add shortcut -H to --no-headers, it's too cumbersome to type

2025-12-18 21:11:03 +01:00 · 2023-05-03 12:54:50 +02:00
34 changed files with 475 additions and 1831 deletions
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -7,7 +7,7 @@ assignees: TLINDEN

 ---

-**Description**
+**Describtion**
 <!-- Please provide a clear and concise description of the issue: -->


--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -7,7 +7,7 @@ assignees: TLINDEN

 ---

-**Description**
+**Describtion**
 <!-- Please provide a clear and concise description of the feature you desire: -->


--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,10 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "gomod"
-    directory: "/"
-    schedule:
-      interval: "monthly"
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-        interval: "monthly"
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -4,7 +4,7 @@ jobs:
  build:
    strategy:
      matrix:
-        version: [1.18, 1.19]
+        version: [1.17, 1.18, 1.19]
        os: [ubuntu-latest, windows-latest, macos-latest]
    name: Build
    runs-on: ${{ matrix.os }}
@@ -30,9 +30,29 @@ jobs:
    steps:
      - uses: actions/setup-go@v3
        with:
-          go-version: 1.18
+          go-version: 1.17
      - uses: actions/checkout@v3
      - name: golangci-lint
        uses: golangci/golangci-lint-action@v3
-        with:
-          skip-cache: true
+        #with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          # version: v1.29
+
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true
+
+          # Optional: if set to true then the all caching functionality will be complete disabled,
+          #           takes precedence over all other caching options.
+          # skip-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/go/pkg.
+          # skip-pkg-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/.cache/go-build.
+          # skip-build-cache: true
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +0,0 @@
-releases
-tablizer
--- a/8
+++ b/8
@@ -91,11 +91,3 @@ show-versions: buildlocal

 goupdate:
 	go get -t -u=patch ./...
-
-lint:
-	golangci-lint run
-
-# keep til ireturn
-lint-full:
-	golangci-lint run --enable-all --exclude-use-default --disable exhaustivestruct,exhaustruct,depguard,interfacer,deadcode,golint,structcheck,scopelint,varcheck,ifshort,maligned,nosnakecase,godot,funlen,gofumpt,cyclop,noctx,gochecknoglobals,paralleltest,forbidigo,gci,godox,goimports,ireturn,stylecheck,testpackage,mirror,nestif,revive,goerr113,gomnd
-	gocritic check -enableAll *.go
--- a/README.md
+++ b/README.md
@@ -70,17 +70,6 @@ NAME(1)                      READY(2) STATUS(3)  RESTARTS(4)    AGE(5)
 repldepl-7bcd8d5b64-q2bf4    1/1      Running    1 (69m ago)    5h26m
 ```

-Sometimes a filter regex is to broad  and you wish to filter only on a
-particular column. This is possible using `-F`:
-```
-% kubectl get pods | tablizer -n -Fname=2
-NAME                            READY   STATUS  RESTARTS        AGE
-repldepl-7bcd8d5b64-q2bf4       1/1     Running 1 (69m ago)     5h26m
-```
-
-Here we filtered  the `NAME` column for `2`, which  would have matched
-otherwise on all rows.
-
 There are more output modes like org-mode (orgtbl) and markdown.

 ## Demo
--- a/TODO.md
+++ b/TODO.md
@@ -6,13 +6,4 @@

 - add --no-headers option

-### Lisp Plugin Infrastructure using zygo

-Hooks:
-
-| Filter    | Purpose                                                     | Args                | Return |
-|-----------|-------------------------------------------------------------|---------------------|--------|
-| filter    | include or exclude lines                                    | row as hash         | bool   |
-| process   | do calculations with data, store results in global lisp env | whole dataset       | nil    |
-| transpose | modify a cell                                               | headername and cell | cell   |
-| append    | add one or more rows to the dataset (use this to add stats) | nil                 | rows   |
--- a/cfg/config.go
+++ b/cfg/config.go
@@ -1,5 +1,5 @@
 /*
-Copyright © 2022-2024 Thomas von Dein
+Copyright © 2022 Thomas von Dein

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -19,50 +19,27 @@ package cfg
 import (
 	"errors"
 	"fmt"
+	"github.com/gookit/color"
 	"os"
 	"regexp"
-	"strings"
-
-	"github.com/glycerine/zygomys/zygo"
-	"github.com/gookit/color"
-	"github.com/hashicorp/hcl/v2/hclsimple"
 )

 const DefaultSeparator string = `(\s\s+|\t)`
-const Version string = "v1.2.0"
-const MAXPARTS = 2
-
-var DefaultLoadPath = os.Getenv("HOME") + "/.config/tablizer/lisp"
-var DefaultConfigfile = os.Getenv("HOME") + "/.config/tablizer/config"
+const Version string = "v1.0.15"

 var VERSION string // maintained by -x

-// public config, set via config file or using defaults
-type Settings struct {
-	FG             string `hcl:"FG"`
-	BG             string `hcl:"BG"`
-	HighlightFG    string `hcl:"HighlightFG"`
-	HighlightBG    string `hcl:"HighlightBG"`
-	NoHighlightFG  string `hcl:"NoHighlightFG"`
-	NoHighlightBG  string `hcl:"NoHighlightBG"`
-	HighlightHdrFG string `hcl:"HighlightHdrFG"`
-	HighlightHdrBG string `hcl:"HighlightHdrBG"`
-}
-
-// internal config
 type Config struct {
-	Debug          bool
-	NoNumbering    bool
-	NoHeaders      bool
-	Columns        string
-	UseColumns     []int
-	Separator      string
-	OutputMode     int
-	InvertMatch    bool
-	Pattern        string
-	PatternR       *regexp.Regexp
-	UseFuzzySearch bool
-	UseHighlight   bool
+	Debug       bool
+	NoNumbering bool
+	NoHeaders   bool
+	Columns     string
+	UseColumns  []int
+	Separator   string
+	OutputMode  int
+	InvertMatch bool
+	Pattern     string
+	PatternR    *regexp.Regexp

 	SortMode       string
 	SortDescending bool
@@ -72,28 +49,9 @@ type Config struct {
 	 FIXME: make configurable somehow, config file or ENV
 	 see https://github.com/gookit/color.
 	*/
-	ColorStyle        color.Style
-	HighlightStyle    color.Style
-	NoHighlightStyle  color.Style
-	HighlightHdrStyle color.Style
+	ColorStyle color.Style

 	NoColor bool
-
-	// special  case: we use the  config struct to transport  the lisp
-	// env trough the program
-	Lisp *zygo.Zlisp
-
-	// a path containing lisp scripts to be loaded on startup
-	LispLoadPath string
-
-	// config file, optional
-	Configfile string
-
-	Settings Settings
-
-	// used for field filtering
-	Rawfilters []string
-	Filters    map[string]*regexp.Regexp
 }

 // maps outputmode short flags to output mode, ie. -O => -o orgtbl
@@ -115,7 +73,7 @@ const (
 	Shell
 	Yaml
 	CSV
-	ASCII
+	Ascii
 )

 // various sort types
@@ -125,108 +83,50 @@ type Sortmode struct {
 	Age     bool
 }

-// valid lisp hooks
-var ValidHooks []string
-
 // default color schemes
-func (conf *Config) Colors() map[color.Level]map[string]color.Color {
-	colors := map[color.Level]map[string]color.Color{
+func Colors() map[color.Level]map[string]color.Color {
+	return map[color.Level]map[string]color.Color{
 		color.Level16: {
-			"bg": color.BgGreen, "fg": color.FgWhite,
-			"hlbg": color.BgGray, "hlfg": color.FgWhite,
+			"bg": color.BgGreen, "fg": color.FgBlack,
 		},
 		color.Level256: {
-			"bg": color.BgLightGreen, "fg": color.FgWhite,
-			"hlbg": color.BgLightBlue, "hlfg": color.FgWhite,
+			"bg": color.BgLightGreen, "fg": color.FgBlack,
 		},
 		color.LevelRgb: {
-			"bg": color.BgLightGreen, "fg": color.FgWhite,
-			"hlbg": color.BgHiGreen, "hlfg": color.FgWhite,
-			"nohlbg": color.BgWhite, "nohlfg": color.FgLightGreen,
-			"hdrbg": color.BgBlue, "hdrfg": color.FgWhite,
+			// FIXME: maybe use something nicer
+			"bg": color.BgLightGreen, "fg": color.FgBlack,
 		},
 	}
-
-	if len(conf.Settings.BG) > 0 {
-		colors[color.Level16]["bg"] = ColorStringToBGColor(conf.Settings.BG)
-		colors[color.Level256]["bg"] = ColorStringToBGColor(conf.Settings.BG)
-		colors[color.LevelRgb]["bg"] = ColorStringToBGColor(conf.Settings.BG)
-	}
-
-	if len(conf.Settings.FG) > 0 {
-		colors[color.Level16]["fg"] = ColorStringToColor(conf.Settings.FG)
-		colors[color.Level256]["fg"] = ColorStringToColor(conf.Settings.FG)
-		colors[color.LevelRgb]["fg"] = ColorStringToColor(conf.Settings.FG)
-	}
-
-	if len(conf.Settings.HighlightBG) > 0 {
-		colors[color.Level16]["hlbg"] = ColorStringToBGColor(conf.Settings.HighlightBG)
-		colors[color.Level256]["hlbg"] = ColorStringToBGColor(conf.Settings.HighlightBG)
-		colors[color.LevelRgb]["hlbg"] = ColorStringToBGColor(conf.Settings.HighlightBG)
-	}
-
-	if len(conf.Settings.HighlightFG) > 0 {
-		colors[color.Level16]["hlfg"] = ColorStringToColor(conf.Settings.HighlightFG)
-		colors[color.Level256]["hlfg"] = ColorStringToColor(conf.Settings.HighlightFG)
-		colors[color.LevelRgb]["hlfg"] = ColorStringToColor(conf.Settings.HighlightFG)
-	}
-
-	if len(conf.Settings.NoHighlightBG) > 0 {
-		colors[color.Level16]["nohlbg"] = ColorStringToBGColor(conf.Settings.NoHighlightBG)
-		colors[color.Level256]["nohlbg"] = ColorStringToBGColor(conf.Settings.NoHighlightBG)
-		colors[color.LevelRgb]["nohlbg"] = ColorStringToBGColor(conf.Settings.NoHighlightBG)
-	}
-
-	if len(conf.Settings.NoHighlightFG) > 0 {
-		colors[color.Level16]["nohlfg"] = ColorStringToColor(conf.Settings.NoHighlightFG)
-		colors[color.Level256]["nohlfg"] = ColorStringToColor(conf.Settings.NoHighlightFG)
-		colors[color.LevelRgb]["nohlfg"] = ColorStringToColor(conf.Settings.NoHighlightFG)
-	}
-
-	if len(conf.Settings.HighlightHdrBG) > 0 {
-		colors[color.Level16]["hdrbg"] = ColorStringToBGColor(conf.Settings.HighlightHdrBG)
-		colors[color.Level256]["hdrbg"] = ColorStringToBGColor(conf.Settings.HighlightHdrBG)
-		colors[color.LevelRgb]["hdrbg"] = ColorStringToBGColor(conf.Settings.HighlightHdrBG)
-	}
-
-	if len(conf.Settings.HighlightHdrFG) > 0 {
-		colors[color.Level16]["hdrfg"] = ColorStringToColor(conf.Settings.HighlightHdrFG)
-		colors[color.Level256]["hdrfg"] = ColorStringToColor(conf.Settings.HighlightHdrFG)
-		colors[color.LevelRgb]["hdrfg"] = ColorStringToColor(conf.Settings.HighlightHdrFG)
-	}
-
-	return colors
 }

 // find supported color mode, modifies config based on constants
-func (conf *Config) DetermineColormode() {
+func (c *Config) DetermineColormode() {
 	if !isTerminal(os.Stdout) {
 		color.Disable()
 	} else {
 		level := color.TermColorLevel()
-		colors := conf.Colors()
-
-		conf.ColorStyle = color.New(colors[level]["bg"], colors[level]["fg"])
-		conf.HighlightStyle = color.New(colors[level]["hlbg"], colors[level]["hlfg"])
-		conf.NoHighlightStyle = color.New(colors[level]["nohlbg"], colors[level]["nohlfg"])
-		conf.HighlightHdrStyle = color.New(colors[level]["hdrbg"], colors[level]["hdrfg"])
+		colors := Colors()
+		c.ColorStyle = color.New(colors[level]["bg"], colors[level]["fg"])
 	}
 }

 // Return true if current terminal is interactive
 func isTerminal(f *os.File) bool {
 	o, _ := f.Stat()
-
-	return (o.Mode() & os.ModeCharDevice) == os.ModeCharDevice
+	if (o.Mode() & os.ModeCharDevice) == os.ModeCharDevice {
+		return true
+	} else {
+		return false
+	}
 }

-// main program version
-// generated  version string, used  by -v contains  lib.Version on
-//
-//	main branch, and lib.Version-$branch-$lastcommit-$date on
-//
-// development branch
 func Getversion() string {
+	// main program version
+
+	// generated  version string, used  by -v contains  lib.Version on
+	//  main  branch,   and  lib.Version-$branch-$lastcommit-$date  on
+	// development branch
+
 	return fmt.Sprintf("This is tablizer version %s", VERSION)
 }

@@ -258,129 +158,44 @@ func (conf *Config) PrepareModeFlags(flag Modeflag) {
 	case flag.C:
 		conf.OutputMode = CSV
 	default:
-		conf.OutputMode = ASCII
+		conf.OutputMode = Ascii
 	}
 }

-func (conf *Config) PrepareFilters() error {
-	conf.Filters = make(map[string]*regexp.Regexp, len(conf.Rawfilters))
-
-	for _, filter := range conf.Rawfilters {
-		parts := strings.Split(filter, "=")
-		if len(parts) != MAXPARTS {
-			return errors.New("filter field and value must be separated by =")
-		}
-
-		reg, err := regexp.Compile(parts[1])
-		if err != nil {
-			return fmt.Errorf("failed to compile filter regex for field %s: %w",
-				parts[0], err)
-		}
-
-		conf.Filters[strings.ToLower(parts[0])] = reg
-	}
-
-	return nil
-}
-
-func (conf *Config) CheckEnv() {
+func (c *Config) CheckEnv() {
 	// check for environment vars, command line flags have precedence,
 	// NO_COLOR is being checked by the color module itself.
-	if !conf.NoNumbering {
+	if !c.NoNumbering {
 		_, set := os.LookupEnv("T_NO_HEADER_NUMBERING")
 		if set {
-			conf.NoNumbering = true
+			c.NoNumbering = true
 		}
 	}

-	if len(conf.Columns) == 0 {
+	if len(c.Columns) == 0 {
 		cols := os.Getenv("T_COLUMNS")
 		if len(cols) > 1 {
-			conf.Columns = cols
+			c.Columns = cols
 		}
 	}
 }

-func (conf *Config) ApplyDefaults() {
+func (c *Config) ApplyDefaults() {
 	// mode specific defaults
-	if conf.OutputMode == Yaml || conf.OutputMode == CSV {
-		conf.NoNumbering = true
+	if c.OutputMode == Yaml || c.OutputMode == CSV {
+		c.NoNumbering = true
 	}
-
-	ValidHooks = []string{"filter", "process", "transpose", "append"}
 }

-func (conf *Config) PreparePattern(pattern string) error {
+func (c *Config) PreparePattern(pattern string) error {
 	PatternR, err := regexp.Compile(pattern)

 	if err != nil {
-		return fmt.Errorf("regexp pattern %s is invalid: %w", conf.Pattern, err)
+		return errors.Unwrap(fmt.Errorf("Regexp pattern %s is invalid: %w", c.Pattern, err))
 	}

-	conf.PatternR = PatternR
-	conf.Pattern = pattern
+	c.PatternR = PatternR
+	c.Pattern = pattern

 	return nil
 }
-
-// Parse config file.  Ignore if the file doesn't exist  but return an
-// error if it exists but fails to read or parse
-func (conf *Config) ParseConfigfile() error {
-	path, err := os.Stat(conf.Configfile)
-
-	if os.IsNotExist(err) || path.IsDir() {
-		// ignore non-existent or dirs
-		return nil
-	}
-
-	configstring, err := os.ReadFile(path.Name())
-	if err != nil {
-		return fmt.Errorf("failed to read config file %s: %w", path.Name(), err)
-	}
-
-	err = hclsimple.Decode(
-		path.Name(),
-		configstring,
-		nil,
-		&conf.Settings)
-	if err != nil {
-		return fmt.Errorf("failed to load configuration file %s: %w",
-			path.Name(), err)
-	}
-
-	return nil
-}
-
-// translate color string to internal color value
-func ColorStringToColor(colorname string) color.Color {
-	for name, color := range color.FgColors {
-		if name == colorname {
-			return color
-		}
-	}
-
-	for name, color := range color.ExFgColors {
-		if name == colorname {
-			return color
-		}
-	}
-
-	return color.Normal
-}
-
-// same, for background colors
-func ColorStringToBGColor(colorname string) color.Color {
-	for name, color := range color.BgColors {
-		if name == colorname {
-			return color
-		}
-	}
-
-	for name, color := range color.ExBgColors {
-		if name == colorname {
-			return color
-		}
-	}
-
-	return color.Normal
-}
--- a/cfg/config_test.go
+++ b/cfg/config_test.go
@@ -34,18 +34,18 @@ func TestPrepareModeFlags(t *testing.T) {
 		{Modeflag{O: true}, Orgtbl},
 		{Modeflag{Y: true}, Yaml},
 		{Modeflag{M: true}, Markdown},
-		{Modeflag{}, ASCII},
+		{Modeflag{}, Ascii},
 	}

 	// FIXME: use a map for easier printing
-	for _, testdata := range tests {
-		testname := fmt.Sprintf("PrepareModeFlags-expect-%d", testdata.expect)
+	for _, tt := range tests {
+		testname := fmt.Sprintf("PrepareModeFlags-expect-%d", tt.expect)
 		t.Run(testname, func(t *testing.T) {
-			conf := Config{}
+			c := Config{}

-			conf.PrepareModeFlags(testdata.flag)
-			if conf.OutputMode != testdata.expect {
-				t.Errorf("got: %d, expect: %d", conf.OutputMode, testdata.expect)
+			c.PrepareModeFlags(tt.flag)
+			if c.OutputMode != tt.expect {
+				t.Errorf("got: %d, expect: %d", c.OutputMode, tt.expect)
 			}
 		})
 	}
@@ -63,15 +63,15 @@ func TestPrepareSortFlags(t *testing.T) {
 		{Sortmode{}, "string"},
 	}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("PrepareSortFlags-expect-%s", testdata.expect)
+	for _, tt := range tests {
+		testname := fmt.Sprintf("PrepareSortFlags-expect-%s", tt.expect)
 		t.Run(testname, func(t *testing.T) {
-			conf := Config{}
+			c := Config{}

-			conf.PrepareSortFlags(testdata.flag)
+			c.PrepareSortFlags(tt.flag)

-			if conf.SortMode != testdata.expect {
-				t.Errorf("got: %s, expect: %s", conf.SortMode, testdata.expect)
+			if c.SortMode != tt.expect {
+				t.Errorf("got: %s, expect: %s", c.SortMode, tt.expect)
 			}
 		})
 	}
@@ -86,16 +86,15 @@ func TestPreparePattern(t *testing.T) {
 		{"[a-z", true},
 	}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("PreparePattern-pattern-%s-wanterr-%t",
-			testdata.pattern, testdata.wanterr)
+	for _, tt := range tests {
+		testname := fmt.Sprintf("PreparePattern-pattern-%s-wanterr-%t", tt.pattern, tt.wanterr)
 		t.Run(testname, func(t *testing.T) {
-			conf := Config{}
+			c := Config{}

-			err := conf.PreparePattern(testdata.pattern)
+			err := c.PreparePattern(tt.pattern)

 			if err != nil {
-				if !testdata.wanterr {
+				if !tt.wanterr {
 					t.Errorf("PreparePattern returned error: %s", err)
 				}
 			}
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -1,5 +1,5 @@
 /*
-Copyright © 2022-2024 Thomas von Dein
+Copyright © 2022 Thomas von Dein

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -33,12 +33,11 @@ import (
 func man() {
 	man := exec.Command("less", "-")

-	var buffer bytes.Buffer
-
-	buffer.Write([]byte(manpage))
+	var b bytes.Buffer
+	b.Write([]byte(manpage))

 	man.Stdout = os.Stdout
-	man.Stdin = &buffer
+	man.Stdin = &b
 	man.Stderr = os.Stderr

 	err := man.Run()
@@ -59,7 +58,7 @@ func completion(cmd *cobra.Command, mode string) error {
 	case "powershell":
 		return cmd.Root().GenPowerShellCompletionWithDesc(os.Stdout)
 	default:
-		return errors.New("invalid shell parameter! Valid ones: bash|zsh|fish|powershell")
+		return errors.New("Invalid shell parameter! Valid ones: bash|zsh|fish|powershell")
 	}
 }

@@ -80,13 +79,11 @@ func Execute() {
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if ShowVersion {
 				fmt.Println(cfg.Getversion())
-
 				return nil
 			}

 			if ShowManual {
 				man()
-
 				return nil
 			}

@@ -95,103 +92,48 @@ func Execute() {
 			}

 			// Setup
-			err := conf.ParseConfigfile()
-			if err != nil {
-				return err
-			}
-
 			conf.CheckEnv()
 			conf.PrepareModeFlags(modeflag)
 			conf.PrepareSortFlags(sortmode)
-
-			if err = conf.PrepareFilters(); err != nil {
-				return err
-			}
-
 			conf.DetermineColormode()
 			conf.ApplyDefaults()

-			// setup lisp env, load plugins etc
-			err = lib.SetupLisp(&conf)
-			if err != nil {
-				return err
-			}
-
 			// actual execution starts here
 			return lib.ProcessFiles(&conf, args)
 		},
 	}

 	// options
-	rootCmd.PersistentFlags().BoolVarP(&conf.Debug, "debug", "d", false,
-		"Enable debugging")
-	rootCmd.PersistentFlags().BoolVarP(&conf.NoNumbering, "no-numbering", "n", false,
-		"Disable header numbering")
-	rootCmd.PersistentFlags().BoolVarP(&conf.NoHeaders, "no-headers", "H", false,
-		"Disable header display")
-	rootCmd.PersistentFlags().BoolVarP(&conf.NoColor, "no-color", "N", false,
-		"Disable pattern highlighting")
-	rootCmd.PersistentFlags().BoolVarP(&ShowVersion, "version", "V", false,
-		"Print program version")
-	rootCmd.PersistentFlags().BoolVarP(&conf.InvertMatch, "invert-match", "v", false,
-		"select non-matching rows")
-	rootCmd.PersistentFlags().BoolVarP(&ShowManual, "man", "m", false,
-		"Display manual page")
-	rootCmd.PersistentFlags().BoolVarP(&conf.UseFuzzySearch, "fuzzy", "z", false,
-		"Use fuzzy searching")
-	rootCmd.PersistentFlags().BoolVarP(&conf.UseHighlight, "highlight-lines", "L", false,
-		"Use alternating background colors")
-	rootCmd.PersistentFlags().StringVarP(&ShowCompletion, "completion", "", "",
-		"Display completion code")
-	rootCmd.PersistentFlags().StringVarP(&conf.Separator, "separator", "s", cfg.DefaultSeparator,
-		"Custom field separator")
-	rootCmd.PersistentFlags().StringVarP(&conf.Columns, "columns", "c", "",
-		"Only show the speficied columns (separated by ,)")
+	rootCmd.PersistentFlags().BoolVarP(&conf.Debug, "debug", "d", false, "Enable debugging")
+	rootCmd.PersistentFlags().BoolVarP(&conf.NoNumbering, "no-numbering", "n", false, "Disable header numbering")
+	rootCmd.PersistentFlags().BoolVarP(&conf.NoHeaders, "no-headers", "H", false, "Disable header display")
+	rootCmd.PersistentFlags().BoolVarP(&conf.NoColor, "no-color", "N", false, "Disable pattern highlighting")
+	rootCmd.PersistentFlags().BoolVarP(&ShowVersion, "version", "V", false, "Print program version")
+	rootCmd.PersistentFlags().BoolVarP(&conf.InvertMatch, "invert-match", "v", false, "select non-matching rows")
+	rootCmd.PersistentFlags().BoolVarP(&ShowManual, "man", "m", false, "Display manual page")
+	rootCmd.PersistentFlags().StringVarP(&ShowCompletion, "completion", "", "", "Display completion code")
+	rootCmd.PersistentFlags().StringVarP(&conf.Separator, "separator", "s", cfg.DefaultSeparator, "Custom field separator")
+	rootCmd.PersistentFlags().StringVarP(&conf.Columns, "columns", "c", "", "Only show the speficied columns (separated by ,)")

 	// sort options
-	rootCmd.PersistentFlags().IntVarP(&conf.SortByColumn, "sort-by", "k", 0,
-		"Sort by column (default: 1)")
+	rootCmd.PersistentFlags().IntVarP(&conf.SortByColumn, "sort-by", "k", 0, "Sort by column (default: 1)")

 	// sort mode, only 1 allowed
-	rootCmd.PersistentFlags().BoolVarP(&conf.SortDescending, "sort-desc", "D", false,
-		"Sort in descending order (default: ascending)")
-	rootCmd.PersistentFlags().BoolVarP(&sortmode.Numeric, "sort-numeric", "i", false,
-		"sort according to string numerical value")
-	rootCmd.PersistentFlags().BoolVarP(&sortmode.Time, "sort-time", "t", false,
-		"sort according to time string")
-	rootCmd.PersistentFlags().BoolVarP(&sortmode.Age, "sort-age", "a", false,
-		"sort according to age (duration) string")
-	rootCmd.MarkFlagsMutuallyExclusive("sort-numeric", "sort-time",
-		"sort-age")
+	rootCmd.PersistentFlags().BoolVarP(&conf.SortDescending, "sort-desc", "D", false, "Sort in descending order (default: ascending)")
+	rootCmd.PersistentFlags().BoolVarP(&sortmode.Numeric, "sort-numeric", "i", false, "sort according to string numerical value")
+	rootCmd.PersistentFlags().BoolVarP(&sortmode.Time, "sort-time", "t", false, "sort according to time string")
+	rootCmd.PersistentFlags().BoolVarP(&sortmode.Age, "sort-age", "a", false, "sort according to age (duration) string")
+	rootCmd.MarkFlagsMutuallyExclusive("sort-numeric", "sort-time", "sort-age")

 	// output flags, only 1 allowed
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.X, "extended", "X", false,
-		"Enable extended output")
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.M, "markdown", "M", false,
-		"Enable markdown table output")
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.O, "orgtbl", "O", false,
-		"Enable org-mode table output")
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.S, "shell", "S", false,
-		"Enable shell mode output")
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.Y, "yaml", "Y", false,
-		"Enable yaml output")
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.C, "csv", "C", false,
-		"Enable CSV output")
-	rootCmd.PersistentFlags().BoolVarP(&modeflag.A, "ascii", "A", false,
-		"Enable ASCII output (default)")
-	rootCmd.MarkFlagsMutuallyExclusive("extended", "markdown", "orgtbl",
-		"shell", "yaml", "csv")
-
-	// lisp options
-	rootCmd.PersistentFlags().StringVarP(&conf.LispLoadPath, "load-path", "l", cfg.DefaultLoadPath,
-		"Load path for lisp plugins (expects *.zy files)")
-
-	// config file
-	rootCmd.PersistentFlags().StringVarP(&conf.Configfile, "config", "f", cfg.DefaultConfigfile,
-		"config file (default: ~/.config/tablizer/config)")
-
-	// filters
-	rootCmd.PersistentFlags().StringArrayVarP(&conf.Rawfilters, "filter", "F", nil, "Filter by field (field=regexp)")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.X, "extended", "X", false, "Enable extended output")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.M, "markdown", "M", false, "Enable markdown table output")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.O, "orgtbl", "O", false, "Enable org-mode table output")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.S, "shell", "S", false, "Enable shell mode output")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.Y, "yaml", "Y", false, "Enable yaml output")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.C, "csv", "C", false, "Enable CSV output")
+	rootCmd.PersistentFlags().BoolVarP(&modeflag.A, "ascii", "A", false, "Enable ASCII output (default)")
+	rootCmd.MarkFlagsMutuallyExclusive("extended", "markdown", "orgtbl", "shell", "yaml", "csv")

 	rootCmd.SetUsageTemplate(strings.TrimSpace(usage) + "\n")

--- a/cmd/tablizer.go
+++ b/cmd/tablizer.go
@@ -13,21 +13,18 @@ SYNOPSIS
          -v, --invert-match       select non-matching rows
          -n, --no-numbering       Disable header numbering
          -N, --no-color           Disable pattern highlighting
-          -H, --no-headers         Disable headers display
+              --no-headers         Disable headers display
          -s, --separator string   Custom field separator
          -k, --sort-by int        Sort by column (default: 1)
-          -z, --fuzzy              Use fuzzy search [experimental]
-          -F, --filter field=reg   Filter given field with regex, can be used multiple times

        Output Flags (mutually exclusive):
          -X, --extended           Enable extended output
          -M, --markdown           Enable markdown table output
          -O, --orgtbl             Enable org-mode table output
-          -S, --shell              Enable shell evaluable output
+          -S, --shell              Enable shell evaluable ouput
          -Y, --yaml               Enable yaml output
          -C, --csv                Enable CSV output
          -A, --ascii              Default output mode, ascii tabular
-          -L, --hightlight-lines   Use alternating background colors for tables

        Sort Mode Flags (mutually exclusive):
          -a, --sort-age           sort according to age (duration) string
@@ -37,11 +34,10 @@ SYNOPSIS

        Other Flags:
              --completion <shell> Generate the autocompletion script for <shell>
-          -f, --config <file>      Configuration file (default: ~/.config/tablizer/config)
          -d, --debug              Enable debugging
          -h, --help               help for tablizer
          -m, --man                Display manual page
-          -V, --version            Print program version
+          -v, --version            Print program version

 DESCRIPTION
    Many programs generate tabular output. But sometimes you need to
@@ -93,9 +89,9 @@ DESCRIPTION
    The numbering can be suppressed by using the -n option.

    By default tablizer shows a header containing the names of each column.
-    This can be disabled using the -H option. Be aware that this only
-    affects tabular output modes. Shell, Extended, Yaml and CSV output modes
-    always use the column names.
+    This can be disabled using the --no-headers option. Be aware that this
+    only affects tabular output modes. Shell, Extended, Yaml and CSV output
+    modes always use the column names.

    By default, if a pattern has been speficied, matches will be
    highlighted. You can disable this behavior with the -N option.
@@ -118,7 +114,7 @@ DESCRIPTION
    Finally the -d option enables debugging output which is mostly useful
    for the developer.

-  PATTERNS AND FILTERING
+  PATTERNS
    You can reduce the rows being displayed by using a regular expression
    pattern. The regexp is PCRE compatible, refer to the syntax cheat sheet
    here: <https://github.com/google/re2/wiki/Syntax>. If you want to read a
@@ -142,23 +138,6 @@ DESCRIPTION

        kubectl get pods -A | tablizer "(?i)account"

-    You can use the experimental fuzzy search feature by providing the
-    option -z, in which case the pattern is regarded as a fuzzy search term,
-    not a regexp.
-
-    Sometimes you want to filter by one or more columns. You can do that
-    using the -F option. The option can be specified multiple times and has
-    the following format:
-
-        fieldname=regexp
-
-    Fieldnames (== columns headers) are case insensitive.
-
-    If you specify more than one filter, both filters have to match (AND
-    operation).
-
-    If the option -v is specified, the filtering is inverted.
-
  COLUMNS
    The parameter -c can be used to specify, which columns to display. By
    default tablizer numerizes the header names and these numbers can be
@@ -273,36 +252,6 @@ DESCRIPTION

        and source this file from your PowerShell profile.

-CONFIGURATION AND COLORS
-    YOu can put certain configuration values into a configuration file in
-    HCL format. By default tablizer looks for
-    "$HOME/.config/tablizer/config", but you can provide one using the
-    parameter "-f".
-
-    In the configuration the following variables can be defined:
-
-        BG             = "lightGreen"
-        FG             = "white"
-        HighlightBG    = "lightGreen"
-        HighlightFG    = "white"
-        NoHighlightBG  = "white"
-        NoHighlightFG  = "lightGreen"
-        HighlightHdrBG = "red"
-        HighlightHdrFG = "white"
-
-    The following color definitions are available:
-
-    black, blue, cyan, darkGray, default, green, lightBlue, lightCyan,
-    lightGreen, lightMagenta, lightRed, lightWhite, lightYellow, magenta,
-    red, white, yellow
-
-    The Variables FG and BG are being used to highlight matches. The other
-    *FG and *BG variables are for colored table output (enabled with the
-    "-L" parameter).
-
-    Colorization can be turned off completely either by setting the
-    parameter "-N" or the environment variable NO_COLOR to a true value.
-
 BUGS
    In order to report a bug, unexpected behavior, feature requests or to
    submit a patch, please open an issue on github:
@@ -312,7 +261,7 @@ LICENSE
    This software is licensed under the GNU GENERAL PUBLIC LICENSE version
    3.

-    Copyright (c) 2022-2024 by Thomas von Dein
+    Copyright (c) 2023 by Thomas von Dein

    This software uses the following GO modules:

@@ -350,21 +299,18 @@ Operational Flags:
  -v, --invert-match       select non-matching rows
  -n, --no-numbering       Disable header numbering
  -N, --no-color           Disable pattern highlighting
-  -H, --no-headers         Disable headers display
+      --no-headers         Disable headers display
  -s, --separator string   Custom field separator
  -k, --sort-by int        Sort by column (default: 1)
-  -z, --fuzzy              Use fuzzy search [experimental]
-  -F, --filter field=reg   Filter given field with regex, can be used multiple times

 Output Flags (mutually exclusive):
  -X, --extended           Enable extended output
  -M, --markdown           Enable markdown table output
  -O, --orgtbl             Enable org-mode table output
-  -S, --shell              Enable shell evaluable output
+  -S, --shell              Enable shell evaluable ouput
  -Y, --yaml               Enable yaml output
  -C, --csv                Enable CSV output
  -A, --ascii              Default output mode, ascii tabular
-  -L, --hightlight-lines   Use alternating background colors for tables

 Sort Mode Flags (mutually exclusive):
  -a, --sort-age           sort according to age (duration) string
@@ -374,11 +320,10 @@ Sort Mode Flags (mutually exclusive):

 Other Flags:
      --completion <shell> Generate the autocompletion script for <shell>
-  -f, --config <file>      Configuration file (default: ~/.config/tablizer/config)
  -d, --debug              Enable debugging
  -h, --help               help for tablizer
  -m, --man                Display manual page
-  -V, --version            Print program version
+  -v, --version            Print program version


 `
--- a/config.hcl
+++ b/config.hcl
@@ -1,12 +0,0 @@
-# supported  colors:
-# black, blue,  cyan, darkGray, default, green,  lightBlue, lightCyan,
-# lightGreen,   lightMagenta,   lightRed,   lightWhite,   lightYellow,
-# magenta, red, white, yellow
-BG             = "lightGreen"
-FG             = "white"
-HighlightBG    = "lightGreen"
-HighlightFG    = "white"
-NoHighlightBG  = "white"
-NoHighlightFG  = "lightGreen"
-HighlightHdrBG = "red"
-HighlightHdrFG = "white"
--- a/go.mod
+++ b/go.mod
@@ -5,39 +5,20 @@ go 1.18
 require (
 	github.com/alecthomas/repr v0.1.1
 	github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de
-	github.com/glycerine/zygomys v5.1.2+incompatible
 	github.com/gookit/color v1.5.2
-	github.com/hashicorp/hcl/v2 v2.19.1
-	github.com/lithammer/fuzzysearch v1.1.7
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/spf13/cobra v1.6.1
 	gopkg.in/yaml.v3 v3.0.1
 )

 require (
-	github.com/agext/levenshtein v1.2.1 // indirect
-	github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect
-	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
-	github.com/glycerine/blake2b v0.0.0-20151022103502-3c8c640cd7be // indirect
-	github.com/glycerine/goconvey v0.0.0-20190410193231-58a59202ab31 // indirect
-	github.com/glycerine/greenpack v5.1.1+incompatible // indirect
-	github.com/glycerine/liner v0.0.0-20160121172638-72909af234e0 // indirect
-	github.com/google/go-cmp v0.5.6 // indirect
-	github.com/gopherjs/gopherjs v1.17.2 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
-	github.com/jtolds/gls v4.20.0+incompatible // indirect
-	github.com/mattn/go-runewidth v0.0.10 // indirect
-	github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7 // indirect
-	github.com/philhofer/fwd v1.1.2 // indirect
-	github.com/rivo/uniseg v0.1.0 // indirect
-	github.com/shurcooL/go v0.0.0-20200502201357-93f07166e636 // indirect
-	github.com/shurcooL/go-goon v1.0.0 // indirect
+	github.com/mattn/go-runewidth v0.0.14 // indirect
+
+    // force release. > 0.4. doesnt build everywhere, see:
+    // https://github.com/TLINDEN/tablizer/actions/runs/3396457307/jobs/5647544615
+    github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/tinylib/msgp v1.1.9 // indirect
-	github.com/ugorji/go/codec v1.2.11 // indirect
-	github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 // indirect
-	github.com/zclconf/go-cty v1.13.0 // indirect
-	golang.org/x/sys v0.13.0 // indirect
-	golang.org/x/text v0.11.0 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	golang.org/x/sys v0.1.0 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,65 +1,28 @@
-github.com/agext/levenshtein v1.2.1 h1:QmvMAjj2aEICytGiWzmxoE0x2KZvE0fvmqMOfy2tjT8=
-github.com/agext/levenshtein v1.2.1/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=
 github.com/alecthomas/repr v0.1.1 h1:87P60cSmareLAxMc4Hro0r2RBY4ROm0dYwkJNpS4pPs=
 github.com/alecthomas/repr v0.1.1/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
-github.com/apparentlymart/go-textseg/v13 v13.0.0 h1:Y+KvPE1NYz0xl601PVImeQfFyEy6iT90AvPUL1NNfNw=
-github.com/apparentlymart/go-textseg/v13 v13.0.0/go.mod h1:ZK2fH7c4NqDTLtiYLvIkEghdlcqw7yxLeM89kiTRPUo=
-github.com/apparentlymart/go-textseg/v15 v15.0.0 h1:uYvfpb3DyLSCGWnctWKGj857c6ew1u1fNQOlOtuGxQY=
-github.com/apparentlymart/go-textseg/v15 v15.0.0/go.mod h1:K8XmNZdhEBkdlyDdvbmmsvpAG721bKi0joRfFdHIWJ4=
 github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de h1:FxWPpzIjnTlhPwqqXc4/vE0f7GvRjuAsbW+HOIe8KnA=
 github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de/go.mod h1:DCaWoUhZrYW9p1lxo/cm8EmUOOzAPSEZNGF2DK1dJgw=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/glycerine/blake2b v0.0.0-20151022103502-3c8c640cd7be h1:XBJdPGgA3qqhW+p9CANCAVdF7ZIXdu3pZAkypMkKAjE=
-github.com/glycerine/blake2b v0.0.0-20151022103502-3c8c640cd7be/go.mod h1:OSCrScrFAjcBObrulk6BEQlytA462OkG1UGB5NYj9kE=
-github.com/glycerine/goconvey v0.0.0-20190410193231-58a59202ab31 h1:gclg6gY70GLy3PbkQ1AERPfmLMMagS60DKF78eWwLn8=
-github.com/glycerine/goconvey v0.0.0-20190410193231-58a59202ab31/go.mod h1:Ogl1Tioa0aV7gstGFO7KhffUsb9M4ydbEbbxpcEDc24=
-github.com/glycerine/greenpack v5.1.1+incompatible h1:fDr9i6MkSGZmAy4VXPfJhW+SyK2/LNnzIp5nHyDiaIM=
-github.com/glycerine/greenpack v5.1.1+incompatible/go.mod h1:us0jVISAESGjsEuLlAfCd5nkZm6W6WQF18HPuOecIg4=
-github.com/glycerine/liner v0.0.0-20160121172638-72909af234e0 h1:4ZegphJXBTc4uFQ08UVoWYmQXorGa+ipXetUj83sMBc=
-github.com/glycerine/liner v0.0.0-20160121172638-72909af234e0/go.mod h1:AqJLs6UeoC65dnHxyCQ6MO31P5STpjcmgaANAU+No8Q=
-github.com/glycerine/zygomys v5.1.2+incompatible h1:jmcdmA3XPxgfOunAXFpipE9LQoUL6eX6d2mhYyjV4GE=
-github.com/glycerine/zygomys v5.1.2+incompatible/go.mod h1:i3SPKZpmy9dwF/3iWrXJ/ZLyzZucegwypwOmqRkUUaQ=
-github.com/go-test/deep v1.0.3 h1:ZrJSEWsXzPOxaZnFteGEfooLba+ju3FYIbOrS+rQd68=
-github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
-github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/gookit/color v1.5.2 h1:uLnfXcaFjlrDnQDT+NCBcfhrXqYTx/rcCa6xn01Y8yI=
 github.com/gookit/color v1.5.2/go.mod h1:w8h4bGiHeeBpvQVePTutdbERIUf3oJE5lZ8HM0UgXyg=
-github.com/gopherjs/gopherjs v1.17.2 h1:fQnZVsXk8uxXIStYb0N4bGk7jeyTalG/wsZjQ25dO0g=
-github.com/gopherjs/gopherjs v1.17.2/go.mod h1:pRRIvn/QzFLrKfvEz3qUuEhtE/zLCWfreZ6J5gM2i+k=
-github.com/hashicorp/hcl/v2 v2.19.1 h1://i05Jqznmb2EXqa39Nsvyan2o5XyMowW5fnCKW5RPI=
-github.com/hashicorp/hcl/v2 v2.19.1/go.mod h1:ThLC89FV4p9MPW804KVbe/cEXoQ8NZEh+JtMeeGErHE=
 github.com/inconshreveable/mousetrap v1.0.1 h1:U3uMjPSQEBMNp1lFxmllqCPM6P5u/Xq7Pgzkat/bFNc=
 github.com/inconshreveable/mousetrap v1.0.1/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
-github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
-github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
-github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348 h1:MtvEpTB6LX3vkb4ax0b5D2DHbNAUsen0Gx5wZoq3lV4=
-github.com/lithammer/fuzzysearch v1.1.7 h1:q8rZNmBIUkqxsxb/IlwsXVbCoPIH/0juxjFHY0UIwhU=
-github.com/lithammer/fuzzysearch v1.1.7/go.mod h1:ZhIlfRGxnD8qa9car/yplC6GmnM14CS07BYAKJJBK2I=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-runewidth v0.0.10 h1:CoZ3S2P7pvtP45xOtBw+/mDL2z0RKI576gSkzRRpdGg=
 github.com/mattn/go-runewidth v0.0.10/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
-github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7 h1:DpOJ2HYzCv8LZP15IdmG+YdwD2luVPHITV96TkirNBM=
-github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7/go.mod h1:ZXFpozHsX6DPmq2I0TCekCxypsnAUbP2oI0UX1GXzOo=
+github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
+github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
 github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
-github.com/philhofer/fwd v1.1.2 h1:bnDivRJ1EWPjUIRXV5KfORO897HTbpFAQddBdE8t7Gw=
-github.com/philhofer/fwd v1.1.2/go.mod h1:qkPdfjR2SIEbspLqpe1tO4n5yICnr2DY7mqEx2tUTP0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rivo/uniseg v0.1.0 h1:+2KBaVoUmb9XzDsrx/Ct0W/EYOSFf/nWTauy++DprtY=
 github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/scylladb/termtables v0.0.0-20191203121021-c4c0b6d42ff4/go.mod h1:C1a7PQSMz9NShzorzCiG2fk9+xuCgLkPeCvMHYR2OWg=
-github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ=
-github.com/shurcooL/go v0.0.0-20200502201357-93f07166e636 h1:aSISeOcal5irEhJd1M+IrApc0PdcN7e7Aj4yuEnOrfQ=
-github.com/shurcooL/go v0.0.0-20200502201357-93f07166e636/go.mod h1:TDJrrUr11Vxrven61rcy3hJMUqaf/CLWYhHNPmT14Lk=
-github.com/shurcooL/go-goon v1.0.0 h1:BCQPvxGkHHJ4WpBO4m/9FXbITVIsvAm/T66cCcCGI7E=
-github.com/shurcooL/go-goon v1.0.0/go.mod h1:2wTHMsGo7qnpmqA8ADYZtP4I1DD94JpXGQ3Dxq2YQ5w=
 github.com/spf13/cobra v1.6.1 h1:o94oiPyS4KD1mPy2fmcYYHHfCxLqYjJOhGsCHFZtEzA=
 github.com/spf13/cobra v1.6.1/go.mod h1:IOw/AERYS7UzyrGinqmz6HLUo219MORXGxhbaJUqzrY=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
@@ -70,53 +33,13 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/tinylib/msgp v1.1.9 h1:SHf3yoO2sGA0veCJeCBYLHuttAVFHGm2RHgNodW7wQU=
-github.com/tinylib/msgp v1.1.9/go.mod h1:BCXGB54lDD8qUEPmiG0cQQUANC4IUQyB2ItS2UDlO/k=
-github.com/ugorji/go/codec v1.2.11 h1:BMaWp1Bb6fHwEtbplGBGJ498wD+LKlNSl25MjdZY4dU=
-github.com/ugorji/go/codec v1.2.11/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
-github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 h1:QldyIu/L63oPpyvQmHgvgickp1Yw510KJOqX7H24mg8=
 github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778/go.mod h1:2MuV+tbUrU1zIOPMxZ5EncGwgmMJsa+9ucAQZXxsObs=
-github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/zclconf/go-cty v1.13.0 h1:It5dfKTTZHe9aeppbNOda3mN7Ag7sg6QkBNm6TkyFa0=
-github.com/zclconf/go-cty v1.13.0/go.mod h1:YKQzy/7pZ7iq2jNFzy5go57xdxdWoLLpaEp4u238AE0=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
+github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
+golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
-golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
-golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
-golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/lib/common.go
+++ b/lib/common.go
@@ -1,5 +1,5 @@
 /*
-Copyright © 2022-2024 Thomas von Dein
+Copyright © 2022 Thomas von Dein

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -24,13 +24,3 @@ type Tabdata struct {
 	headers        []string // [ "ID", "NAME", ...]
 	entries        [][]string
 }
-
-func (data *Tabdata) CloneEmpty() Tabdata {
-	newdata := Tabdata{
-		maxwidthHeader: data.maxwidthHeader,
-		columns:        data.columns,
-		headers:        data.headers,
-	}
-
-	return newdata
-}
--- a/lib/filter.go
+++ b/lib/filter.go
@@ -1,130 +0,0 @@
-/*
-Copyright © 2022-2024 Thomas von Dein
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package lib
-
-import (
-	"bufio"
-	"fmt"
-	"io"
-	"strings"
-
-	"github.com/lithammer/fuzzysearch/fuzzy"
-	"github.com/tlinden/tablizer/cfg"
-)
-
-/*
- * [!]Match a  line, use fuzzy  search for normal pattern  strings and
- * regexp otherwise.
- */
-func matchPattern(conf cfg.Config, line string) bool {
-	if conf.UseFuzzySearch {
-		return fuzzy.MatchFold(conf.Pattern, line)
-	}
-
-	return conf.PatternR.MatchString(line)
-}
-
-/*
- * Filter parsed data by fields. The  filter is positive, so if one or
- * more filters match on a row, it  will be kept, otherwise it will be
- * excluded.
- */
-func FilterByFields(conf cfg.Config, data Tabdata) (Tabdata, bool, error) {
-	if len(conf.Filters) == 0 {
-		// no filters, no checking
-		return Tabdata{}, false, nil
-	}
-
-	newdata := data.CloneEmpty()
-
-	for _, row := range data.entries {
-		keep := true
-
-		for idx, header := range data.headers {
-			if !Exists(conf.Filters, strings.ToLower(header)) {
-				// do not filter by unspecified field
-				continue
-			}
-
-			if !conf.Filters[strings.ToLower(header)].MatchString(row[idx]) {
-				// there IS a filter, but it doesn't match
-				keep = false
-
-				break
-			}
-		}
-
-		if keep == !conf.InvertMatch {
-			// also apply -v
-			newdata.entries = append(newdata.entries, row)
-		}
-	}
-
-	return newdata, true, nil
-}
-
-/* generic map.Exists(key) */
-func Exists[K comparable, V any](m map[K]V, v K) bool {
-	if _, ok := m[v]; ok {
-		return true
-	}
-
-	return false
-}
-
-func FilterByPattern(conf cfg.Config, input io.Reader) (io.Reader, error) {
-	if conf.Pattern == "" {
-		return input, nil
-	}
-
-	scanner := bufio.NewScanner(input)
-	lines := []string{}
-	hadFirst := false
-
-	for scanner.Scan() {
-		line := strings.TrimSpace(scanner.Text())
-		if hadFirst {
-			// don't match 1st line, it's the header
-			if conf.Pattern != "" && matchPattern(conf, line) == conf.InvertMatch {
-				// by default  -v is false, so if a  line does NOT
-				// match the pattern, we will ignore it. However,
-				// if the user specified -v, the matching is inverted,
-				// so we ignore all lines, which DO match.
-				continue
-			}
-
-			// apply user defined lisp filters, if any
-			accept, err := RunFilterHooks(conf, line)
-			if err != nil {
-				return input, fmt.Errorf("failed to apply filter hook: %w", err)
-			}
-
-			if !accept {
-				//  IF there  are filter  hook[s] and  IF one  of them
-				// returns false on the current line, reject it
-				continue
-			}
-		}
-
-		lines = append(lines, line)
-
-		hadFirst = true
-	}
-
-	return strings.NewReader(strings.Join(lines, "\n")), nil
-}
--- a/lib/filter_test.go
+++ b/lib/filter_test.go
@@ -1,162 +0,0 @@
-/*
-Copyright © 2024 Thomas von Dein
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package lib
-
-import (
-	"fmt"
-	"reflect"
-	"testing"
-
-	"github.com/tlinden/tablizer/cfg"
-)
-
-func TestMatchPattern(t *testing.T) {
-	var input = []struct {
-		name    string
-		fuzzy   bool
-		pattern string
-		line    string
-	}{
-		{
-			name:    "normal",
-			pattern: "haus",
-			line:    "hausparty",
-		},
-		{
-			name:    "fuzzy",
-			pattern: "hpt",
-			line:    "haus-party-termin",
-			fuzzy:   true,
-		},
-	}
-
-	for _, inputdata := range input {
-		testname := fmt.Sprintf("match-pattern-%s", inputdata.name)
-
-		t.Run(testname, func(t *testing.T) {
-			conf := cfg.Config{}
-
-			if inputdata.fuzzy {
-				conf.UseFuzzySearch = true
-			}
-
-			err := conf.PreparePattern(inputdata.pattern)
-			if err != nil {
-				t.Errorf("PreparePattern returned error: %s", err)
-			}
-
-			if !matchPattern(conf, inputdata.line) {
-				t.Errorf("matchPattern() did not match\nExp: true\nGot: false\n")
-			}
-		})
-	}
-}
-
-func TestFilterByFields(t *testing.T) {
-	data := Tabdata{
-		headers: []string{
-			"ONE", "TWO", "THREE",
-		},
-		entries: [][]string{
-			{"asd", "igig", "cxxxncnc"},
-			{"19191", "EDD 1", "x"},
-			{"8d8", "AN 1", "y"},
-		},
-	}
-
-	var input = []struct {
-		name   string
-		filter []string
-		expect Tabdata
-		invert bool
-	}{
-		{
-			name:   "one-field",
-			filter: []string{"one=19"},
-			expect: Tabdata{
-				headers: []string{
-					"ONE", "TWO", "THREE",
-				},
-				entries: [][]string{
-					{"19191", "EDD 1", "x"},
-				},
-			},
-		},
-
-		{
-			name:   "one-field-inverted",
-			filter: []string{"one=19"},
-			invert: true,
-			expect: Tabdata{
-				headers: []string{
-					"ONE", "TWO", "THREE",
-				},
-				entries: [][]string{
-					{"asd", "igig", "cxxxncnc"},
-					{"8d8", "AN 1", "y"},
-				},
-			},
-		},
-
-		{
-			name:   "many-fields",
-			filter: []string{"one=19", "two=DD"},
-			expect: Tabdata{
-				headers: []string{
-					"ONE", "TWO", "THREE",
-				},
-				entries: [][]string{
-					{"19191", "EDD 1", "x"},
-				},
-			},
-		},
-
-		{
-			name:   "many-fields-inverted",
-			filter: []string{"one=19", "two=DD"},
-			invert: true,
-			expect: Tabdata{
-				headers: []string{
-					"ONE", "TWO", "THREE",
-				},
-				entries: [][]string{
-					{"asd", "igig", "cxxxncnc"},
-					{"8d8", "AN 1", "y"},
-				},
-			},
-		},
-	}
-
-	for _, inputdata := range input {
-		testname := fmt.Sprintf("filter-by-fields-%s", inputdata.name)
-
-		t.Run(testname, func(t *testing.T) {
-			conf := cfg.Config{Rawfilters: inputdata.filter, InvertMatch: inputdata.invert}
-
-			err := conf.PrepareFilters()
-			if err != nil {
-				t.Errorf("PrepareFilters returned error: %s", err)
-			}
-
-			data, _, _ := FilterByFields(conf, data)
-			if !reflect.DeepEqual(data, inputdata.expect) {
-				t.Errorf("Filtered data does not match expected data:\ngot: %+v\nexp: %+v", data, inputdata.expect)
-			}
-		})
-	}
-}
--- a/lib/helpers.go
+++ b/lib/helpers.go
@@ -20,14 +20,13 @@ package lib
 import (
 	"errors"
 	"fmt"
+	"github.com/gookit/color"
+	"github.com/tlinden/tablizer/cfg"
 	"os"
 	"regexp"
 	"sort"
 	"strconv"
 	"strings"
-
-	"github.com/gookit/color"
-	"github.com/tlinden/tablizer/cfg"
 )

 func contains(s []int, e int) bool {
@@ -36,87 +35,79 @@ func contains(s []int, e int) bool {
 			return true
 		}
 	}
-
 	return false
 }

 // parse columns list given  with -c, modifies config.UseColumns based
 // on eventually given regex
-func PrepareColumns(conf *cfg.Config, data *Tabdata) error {
-	if conf.Columns == "" {
-		return nil
-	}
-
-	for _, use := range strings.Split(conf.Columns, ",") {
-		if len(use) == 0 {
-			return fmt.Errorf("could not parse columns list %s: empty column", conf.Columns)
-		}
-
-		usenum, err := strconv.Atoi(use)
-		if err != nil {
-			// might be a regexp
-			colPattern, err := regexp.Compile(use)
-			if err != nil {
-				msg := fmt.Sprintf("Could not parse columns list %s: %v", conf.Columns, err)
-
+func PrepareColumns(c *cfg.Config, data *Tabdata) error {
+	if len(c.Columns) > 0 {
+		for _, use := range strings.Split(c.Columns, ",") {
+			if len(use) == 0 {
+				msg := fmt.Sprintf("Could not parse columns list %s: empty column", c.Columns)
 				return errors.New(msg)
 			}

-			// find matching header fields
-			for i, head := range data.headers {
-				if colPattern.MatchString(head) {
-					conf.UseColumns = append(conf.UseColumns, i+1)
+			usenum, err := strconv.Atoi(use)
+			if err != nil {
+				// might be a regexp
+				colPattern, err := regexp.Compile(use)
+				if err != nil {
+					msg := fmt.Sprintf("Could not parse columns list %s: %v", c.Columns, err)
+					return errors.New(msg)
 				}
+
+				// find matching header fields
+				for i, head := range data.headers {
+					if colPattern.MatchString(head) {
+						c.UseColumns = append(c.UseColumns, i+1)
+					}
+
+				}
+			} else {
+				// we digress from go  best practises here, because if
+				// a colum spec is not a number, we process them above
+				// inside the err handler  for atoi(). so only add the
+				// number, if it's really just a number.
+				c.UseColumns = append(c.UseColumns, usenum)
 			}
-		} else {
-			// we digress from go  best practises here, because if
-			// a colum spec is not a number, we process them above
-			// inside the err handler  for atoi(). so only add the
-			// number, if it's really just a number.
-			conf.UseColumns = append(conf.UseColumns, usenum)
 		}
+
+		// deduplicate: put all values into a map (value gets map key)
+		// thereby  removing duplicates,  extract keys into  new slice
+		// and sort it
+		imap := make(map[int]int, len(c.UseColumns))
+		for _, i := range c.UseColumns {
+			imap[i] = 0
+		}
+		c.UseColumns = nil
+		for k := range imap {
+			c.UseColumns = append(c.UseColumns, k)
+		}
+		sort.Ints(c.UseColumns)
 	}
-
-	// deduplicate: put all values into a map (value gets map key)
-	// thereby  removing duplicates,  extract keys into  new slice
-	// and sort it
-	imap := make(map[int]int, len(conf.UseColumns))
-	for _, i := range conf.UseColumns {
-		imap[i] = 0
-	}
-
-	conf.UseColumns = nil
-
-	for k := range imap {
-		conf.UseColumns = append(conf.UseColumns, k)
-	}
-
-	sort.Ints(conf.UseColumns)
-
 	return nil
 }

 // prepare headers: add numbers to headers
-func numberizeAndReduceHeaders(conf cfg.Config, data *Tabdata) {
+func numberizeAndReduceHeaders(c cfg.Config, data *Tabdata) {
 	numberedHeaders := []string{}
 	maxwidth := 0 // start from scratch, so we only look at displayed column widths

-	for idx, head := range data.headers {
-		var headlen int
-
-		if len(conf.Columns) > 0 {
+	for i, head := range data.headers {
+		headlen := 0
+		if len(c.Columns) > 0 {
 			// -c specified
-			if !contains(conf.UseColumns, idx+1) {
+			if !contains(c.UseColumns, i+1) {
 				// ignore this one
 				continue
 			}
 		}
-
-		if conf.NoNumbering {
+		if c.NoNumbering {
 			numberedHeaders = append(numberedHeaders, head)
 			headlen = len(head)
 		} else {
-			numhead := fmt.Sprintf("%s(%d)", head, idx+1)
+			numhead := fmt.Sprintf("%s(%d)", head, i+1)
 			headlen = len(numhead)
 			numberedHeaders = append(numberedHeaders, numhead)
 		}
@@ -125,94 +116,49 @@ func numberizeAndReduceHeaders(conf cfg.Config, data *Tabdata) {
 			maxwidth = headlen
 		}
 	}
-
 	data.headers = numberedHeaders
-
 	if data.maxwidthHeader != maxwidth && maxwidth > 0 {
 		data.maxwidthHeader = maxwidth
 	}
 }

 // exclude columns, if any
-func reduceColumns(conf cfg.Config, data *Tabdata) {
-	if len(conf.Columns) > 0 {
+func reduceColumns(c cfg.Config, data *Tabdata) {
+	if len(c.Columns) > 0 {
 		reducedEntries := [][]string{}
-
 		var reducedEntry []string
-
 		for _, entry := range data.entries {
 			reducedEntry = nil
-
 			for i, value := range entry {
-				if !contains(conf.UseColumns, i+1) {
+				if !contains(c.UseColumns, i+1) {
 					continue
 				}

 				reducedEntry = append(reducedEntry, value)
 			}
-
 			reducedEntries = append(reducedEntries, reducedEntry)
 		}
-
 		data.entries = reducedEntries
 	}
 }

-// FIXME: remove this when we only use Tablewriter and strip in ParseFile()!
 func trimRow(row []string) []string {
-	var fixedrow = make([]string, len(row))
-
-	for idx, cell := range row {
-		fixedrow[idx] = strings.TrimSpace(cell)
+	// FIXME: remove this when we only use Tablewriter and strip in ParseFile()!
+	var fixedrow []string
+	for _, cell := range row {
+		fixedrow = append(fixedrow, strings.TrimSpace(cell))
 	}

 	return fixedrow
 }

-// FIXME: refactor this beast!
-func colorizeData(conf cfg.Config, output string) string {
-	switch {
-	case conf.UseHighlight && color.IsConsole(os.Stdout):
-		highlight := true
-		colorized := ""
-		first := true
-
-		for _, line := range strings.Split(output, "\n") {
-			if highlight {
-				if first {
-					// we  need to add  two spaces to the  header line
-					//  because tablewriter omits them for some reason
-					//  in pprint mode. This doesn't matter as long as
-					//  we don't use colorization. But with colors the
-					// missing spaces can be seen.
-					if conf.OutputMode == cfg.ASCII {
-						line += "  "
-					}
-
-					line = conf.HighlightHdrStyle.Sprint(line)
-					first = false
-				} else {
-					line = conf.HighlightStyle.Sprint(line)
-				}
-			} else {
-				line = conf.NoHighlightStyle.Sprint(line)
-			}
-
-			highlight = !highlight
-
-			colorized += line + "\n"
-		}
-
-		return colorized
-
-	case len(conf.Pattern) > 0 && !conf.NoColor && color.IsConsole(os.Stdout):
-		r := regexp.MustCompile("(" + conf.Pattern + ")")
-
+func colorizeData(c cfg.Config, output string) string {
+	if len(c.Pattern) > 0 && !c.NoColor && color.IsConsole(os.Stdout) {
+		r := regexp.MustCompile("(" + c.Pattern + ")")
 		return r.ReplaceAllStringFunc(output, func(in string) string {
-			return conf.ColorStyle.Sprint(in)
+			return c.ColorStyle.Sprint(in)
 		})
-
-	default:
+	} else {
 		return output
 	}
 }
--- a/lib/helpers_test.go
+++ b/lib/helpers_test.go
@@ -19,10 +19,9 @@ package lib

 import (
 	"fmt"
+	"github.com/tlinden/tablizer/cfg"
 	"reflect"
 	"testing"
-
-	"github.com/tlinden/tablizer/cfg"
 )

 func TestContains(t *testing.T) {
@@ -72,18 +71,18 @@ func TestPrepareColumns(t *testing.T) {
 		{"[a-z,4,5", []int{4, 5}, true}, // invalid regexp
 	}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("PrepareColumns-%s-%t", testdata.input, testdata.wanterror)
+	for _, tt := range tests {
+		testname := fmt.Sprintf("PrepareColumns-%s-%t", tt.input, tt.wanterror)
 		t.Run(testname, func(t *testing.T) {
-			conf := cfg.Config{Columns: testdata.input}
-			err := PrepareColumns(&conf, &data)
+			c := cfg.Config{Columns: tt.input}
+			err := PrepareColumns(&c, &data)
 			if err != nil {
-				if !testdata.wanterror {
+				if !tt.wanterror {
 					t.Errorf("got error: %v", err)
 				}
 			} else {
-				if !reflect.DeepEqual(conf.UseColumns, testdata.exp) {
-					t.Errorf("got: %v, expected: %v", conf.UseColumns, testdata.exp)
+				if !reflect.DeepEqual(c.UseColumns, tt.exp) {
+					t.Errorf("got: %v, expected: %v", c.UseColumns, tt.exp)
 				}
 			}
 		})
@@ -115,16 +114,14 @@ func TestReduceColumns(t *testing.T) {

 	input := [][]string{{"a", "b", "c"}}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("reduce-columns-by-%+v", testdata.columns)
-
+	for _, tt := range tests {
+		testname := fmt.Sprintf("reduce-columns-by-%+v", tt.columns)
 		t.Run(testname, func(t *testing.T) {
-			c := cfg.Config{Columns: "x", UseColumns: testdata.columns}
+			c := cfg.Config{Columns: "x", UseColumns: tt.columns}
 			data := Tabdata{entries: input}
 			reduceColumns(c, &data)
-			if !reflect.DeepEqual(data.entries, testdata.expect) {
-				t.Errorf("reduceColumns returned invalid data:\ngot: %+v\nexp: %+v",
-					data.entries, testdata.expect)
+			if !reflect.DeepEqual(data.entries, tt.expect) {
+				t.Errorf("reduceColumns returned invalid data:\ngot: %+v\nexp: %+v", data.entries, tt.expect)
 			}
 		})
 	}
@@ -145,17 +142,15 @@ func TestNumberizeHeaders(t *testing.T) {
 		{[]string{"ONE", "TWO"}, []int{1, 2}, true},
 	}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("numberize-headers-columns-%+v-nonum-%t",
-			testdata.columns, testdata.nonum)
-
+	for _, tt := range tests {
+		testname := fmt.Sprintf("numberize-headers-columns-%+v-nonum-%t", tt.columns, tt.nonum)
 		t.Run(testname, func(t *testing.T) {
-			conf := cfg.Config{Columns: "x", UseColumns: testdata.columns, NoNumbering: testdata.nonum}
+			c := cfg.Config{Columns: "x", UseColumns: tt.columns, NoNumbering: tt.nonum}
 			usedata := data
-			numberizeAndReduceHeaders(conf, &usedata)
-			if !reflect.DeepEqual(usedata.headers, testdata.expect) {
+			numberizeAndReduceHeaders(c, &usedata)
+			if !reflect.DeepEqual(usedata.headers, tt.expect) {
 				t.Errorf("numberizeAndReduceHeaders returned invalid data:\ngot: %+v\nexp: %+v",
-					usedata.headers, testdata.expect)
+					usedata.headers, tt.expect)
 			}
 		})
 	}
--- a/lib/io.go
+++ b/lib/io.go
@@ -19,96 +19,91 @@ package lib

 import (
 	"errors"
-	"fmt"
+	"github.com/tlinden/tablizer/cfg"
 	"io"
 	"os"
-
-	"github.com/tlinden/tablizer/cfg"
 )

-const RWRR = 0755
-
-func ProcessFiles(conf *cfg.Config, args []string) error {
-	fds, pattern, err := determineIO(conf, args)
+func ProcessFiles(c *cfg.Config, args []string) error {
+	fds, pattern, err := determineIO(c, args)

 	if err != nil {
 		return err
 	}

-	if err := conf.PreparePattern(pattern); err != nil {
+	if err := c.PreparePattern(pattern); err != nil {
 		return err
 	}

 	for _, fd := range fds {
-		data, err := Parse(*conf, fd)
+		data, err := Parse(*c, fd)
 		if err != nil {
 			return err
 		}

-		err = PrepareColumns(conf, &data)
+		err = PrepareColumns(c, &data)
 		if err != nil {
 			return err
 		}

-		printData(os.Stdout, *conf, &data)
+		printData(os.Stdout, *c, &data)
 	}

 	return nil
 }

-func determineIO(conf *cfg.Config, args []string) ([]io.Reader, string, error) {
-	var filehandles []io.Reader
-
+func determineIO(c *cfg.Config, args []string) ([]io.Reader, string, error) {
 	var pattern string
-
+	var fds []io.Reader
 	var haveio bool

 	stat, _ := os.Stdin.Stat()
 	if (stat.Mode() & os.ModeCharDevice) == 0 {
 		// we're reading from STDIN, which takes precedence over file args
-		filehandles = append(filehandles, os.Stdin)
-
+		fds = append(fds, os.Stdin)
 		if len(args) > 0 {
 			// ignore any args > 1
 			pattern = args[0]
-			conf.Pattern = args[0] // used for colorization by printData()
+			c.Pattern = args[0] // used for colorization by printData()
 		}
-
 		haveio = true
-	} else if len(args) > 0 {
-		// threre were args left, take a look
-		if args[0] == "-" {
-			// in traditional unix programs a dash denotes STDIN (forced)
-			filehandles = append(filehandles, os.Stdin)
-			haveio = true
-		} else {
-			if _, err := os.Stat(args[0]); err != nil {
-				// first  one is  not a  file, consider  it as  regexp and
-				// shift arg list
-				pattern = args[0]
-				conf.Pattern = args[0] // used for colorization by printData()
-				args = args[1:]
-			}
+	} else {
+		if len(args) > 0 {
+			// threre were args left, take a look
+			if args[0] == "-" {
+				// in traditional unix programs a dash denotes STDIN (forced)
+				fds = append(fds, os.Stdin)
+				haveio = true
+			} else {
+				if _, err := os.Stat(args[0]); err != nil {
+					// first  one is  not a  file, consider  it as  regexp and
+					// shift arg list
+					pattern = args[0]
+					c.Pattern = args[0] // used for colorization by printData()
+					args = args[1:]
+				}

-			if len(args) > 0 {
-				// consider any other args as files
-				for _, file := range args {
-					filehandle, err := os.OpenFile(file, os.O_RDONLY, RWRR)
+				if len(args) > 0 {
+					// consider any other args as files
+					for _, file := range args {

-					if err != nil {
-						return nil, "", fmt.Errorf("failed to read input file %s: %w", file, err)
+						fd, err := os.OpenFile(file, os.O_RDONLY, 0755)
+
+						if err != nil {
+							return nil, "", err
+						}
+
+						fds = append(fds, fd)
+						haveio = true
 					}
-
-					filehandles = append(filehandles, filehandle)
-					haveio = true
 				}
 			}
 		}
 	}

 	if !haveio {
-		return nil, "", errors.New("no file specified and nothing to read on stdin")
+		return nil, "", errors.New("No file specified and nothing to read on stdin!")
 	}

-	return filehandles, pattern, nil
+	return fds, pattern, nil
 }
--- a/lib/lisp.go
+++ b/lib/lisp.go
@@ -1,313 +0,0 @@
-/*
-Copyright © 2023 Thomas von Dein
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package lib
-
-import (
-	"errors"
-	"fmt"
-	"log"
-	"os"
-	"strings"
-
-	"github.com/glycerine/zygomys/zygo"
-	"github.com/tlinden/tablizer/cfg"
-)
-
-/*
-needs to be global because we can't feed an cfg object to AddHook()
-which is being called from user lisp code
-*/
-var Hooks map[string][]*zygo.SexpSymbol
-
-/*
-AddHook() (called addhook from lisp code)  can be used by the user to
-add a function to one of the available hooks provided by tablizer.
-*/
-func AddHook(env *zygo.Zlisp, name string, args []zygo.Sexp) (zygo.Sexp, error) {
-	var hookname string
-
-	if len(args) < 2 {
-		return zygo.SexpNull, errors.New("argument of %add-hook should be: %hook-name %your-function")
-	}
-
-	switch sexptype := args[0].(type) {
-	case *zygo.SexpSymbol:
-		if !HookExists(sexptype.Name()) {
-			return zygo.SexpNull, errors.New("Unknown hook " + sexptype.Name())
-		}
-
-		hookname = sexptype.Name()
-
-	default:
-		return zygo.SexpNull, errors.New("hook name must be a symbol ")
-	}
-
-	switch sexptype := args[1].(type) {
-	case *zygo.SexpSymbol:
-		_, exists := Hooks[hookname]
-		if !exists {
-			Hooks[hookname] = []*zygo.SexpSymbol{sexptype}
-		} else {
-			Hooks[hookname] = append(Hooks[hookname], sexptype)
-		}
-
-	default:
-		return zygo.SexpNull, errors.New("hook function must be a symbol ")
-	}
-
-	return zygo.SexpNull, nil
-}
-
-/*
-Check if a hook exists
-*/
-func HookExists(key string) bool {
-	for _, hook := range cfg.ValidHooks {
-		if hook == key {
-			return true
-		}
-	}
-
-	return false
-}
-
-/*
- * Basic sanity checks and load lisp file
- */
-func LoadAndEvalFile(env *zygo.Zlisp, path string) error {
-	if strings.HasSuffix(path, `.zy`) {
-		code, err := os.ReadFile(path)
-		if err != nil {
-			return fmt.Errorf("failed to read lisp file %s: %w", path, err)
-		}
-
-		// FIXME: check what res (_ here) could be and mean
-		_, err = env.EvalString(string(code))
-		if err != nil {
-			log.Fatal(env.GetStackTrace(err))
-		}
-	}
-
-	return nil
-}
-
-/*
- * Setup lisp interpreter environment
- */
-func SetupLisp(conf *cfg.Config) error {
-	// iterate over load-path and evaluate all *.zy files there, if any
-	// we ignore if load-path does not exist, which is the default anyway
-	path, err := os.Stat(conf.LispLoadPath)
-	if os.IsNotExist(err) {
-		return nil
-	}
-
-	// init global hooks
-	Hooks = make(map[string][]*zygo.SexpSymbol)
-
-	// init sandbox
-	env := zygo.NewZlispSandbox()
-	env.AddFunction("addhook", AddHook)
-
-	if !path.IsDir() {
-		// load single lisp file
-		err = LoadAndEvalFile(env, conf.LispLoadPath)
-		if err != nil {
-			return err
-		}
-	} else {
-		// load all lisp file in load dir
-		dir, err := os.ReadDir(conf.LispLoadPath)
-		if err != nil {
-			return fmt.Errorf("failed to read lisp dir %s: %w",
-				conf.LispLoadPath, err)
-		}
-
-		for _, entry := range dir {
-			if !entry.IsDir() {
-				err := LoadAndEvalFile(env, conf.LispLoadPath+"/"+entry.Name())
-				if err != nil {
-					return err
-				}
-			}
-		}
-	}
-
-	RegisterLib(env)
-
-	conf.Lisp = env
-
-	return nil
-}
-
-/*
-Execute every user lisp function registered as filter hook.
-
-Each function is given the current line as argument and is expected to
-return a boolean.   True indicates to keep the line,  false to skip
-it.
-
-If there  are multiple such  functions registered, then the  first one
-returning false wins,  that is if each function returns  true the line
-will  be kept,  if at  least one  of them  returns false,  it will  be
-skipped.
-*/
-func RunFilterHooks(conf cfg.Config, line string) (bool, error) {
-	for _, hook := range Hooks["filter"] {
-		var result bool
-
-		conf.Lisp.Clear()
-
-		res, err := conf.Lisp.EvalString(fmt.Sprintf("(%s `%s`)", hook.Name(), line))
-		if err != nil {
-			return false, fmt.Errorf("failed to evaluate hook loader: %w", err)
-		}
-
-		switch sexptype := res.(type) {
-		case *zygo.SexpBool:
-			result = sexptype.Val
-		default:
-			return false, fmt.Errorf("filter hook shall return bool")
-		}
-
-		if !result {
-			// the first hook which returns false leads to complete false
-			return result, nil
-		}
-	}
-
-	// if no hook returned false, we succeed and accept the given line
-	return true, nil
-}
-
-/*
-These hooks get the data (Tabdata) readily processed by tablizer as
-argument. They are expected to  return a SexpPair containing a boolean
-denoting  if  the data  has  been  modified  and the  actual  modified
-data. Columns must  be the same, rows may differ.  Cells may also have
-been modified.
-
-Replaces the  internal data structure  Tabdata with the  user supplied
-version.
-
-Only one process hook function is supported.
-
-The somewhat complicated code is being  caused by the fact, that we
-need to convert our internal structure  to a lisp variable and vice
-versa afterwards.
-*/
-func RunProcessHooks(conf cfg.Config, data Tabdata) (Tabdata, bool, error) {
-	var userdata Tabdata
-
-	lisplist := []zygo.Sexp{}
-
-	if len(Hooks["process"]) == 0 {
-		return userdata, false, nil
-	}
-
-	if len(Hooks["process"]) > 1 {
-		fmt.Println("Warning: only one process hook is allowed!")
-	}
-
-	// there are hook[s] installed, convert the go data structure 'data to lisp
-	for _, row := range data.entries {
-		var entry zygo.SexpHash
-
-		for idx, cell := range row {
-			err := entry.HashSet(&zygo.SexpStr{S: data.headers[idx]}, &zygo.SexpStr{S: cell})
-			if err != nil {
-				return userdata, false, fmt.Errorf("failed to convert to lisp data: %w", err)
-			}
-		}
-
-		lisplist = append(lisplist, &entry)
-	}
-
-	// we need to add it to the env so that the function can use the struct directly
-	conf.Lisp.AddGlobal("data", &zygo.SexpArray{Val: lisplist, Env: conf.Lisp})
-
-	// execute the actual hook
-	hook := Hooks["process"][0]
-
-	conf.Lisp.Clear()
-
-	var result bool
-
-	res, err := conf.Lisp.EvalString(fmt.Sprintf("(%s data)", hook.Name()))
-	if err != nil {
-		return userdata, false, fmt.Errorf("failed to eval lisp loader: %w", err)
-	}
-
-	// we expect (bool, array(hash)) as return from the function
-	switch sexptype := res.(type) {
-	case *zygo.SexpPair:
-		switch th := sexptype.Head.(type) {
-		case *zygo.SexpBool:
-			result = th.Val
-		default:
-			return userdata, false, errors.New("xpect (bool, array(hash)) as return value")
-		}
-
-		switch sexptailtype := sexptype.Tail.(type) {
-		case *zygo.SexpArray:
-			lisplist = sexptailtype.Val
-		default:
-			return userdata, false, errors.New("expect (bool, array(hash)) as return value ")
-		}
-	default:
-		return userdata, false, errors.New("filter hook shall return array of hashes ")
-	}
-
-	if !result {
-		// no further processing required
-		return userdata, result, nil
-	}
-
-	// finally convert lispdata back to Tabdata
-	for _, item := range lisplist {
-		row := []string{}
-
-		switch hash := item.(type) {
-		case *zygo.SexpHash:
-			for _, header := range data.headers {
-				entry, err := hash.HashGetDefault(
-					conf.Lisp,
-					&zygo.SexpStr{S: header},
-					&zygo.SexpStr{S: ""})
-				if err != nil {
-					return userdata, false, fmt.Errorf("failed to get lisp hash entry: %w", err)
-				}
-
-				switch sexptype := entry.(type) {
-				case *zygo.SexpStr:
-					row = append(row, sexptype.S)
-				default:
-					return userdata, false, errors.New("hsh values should be string ")
-				}
-			}
-		default:
-			return userdata, false, errors.New("rturned array should contain hashes ")
-		}
-
-		userdata.entries = append(userdata.entries, row)
-	}
-
-	userdata.headers = data.headers
-
-	return userdata, result, nil
-}
--- a/lib/lisplib.go
+++ b/lib/lisplib.go
@@ -1,88 +0,0 @@
-/*
-Copyright © 2023 Thomas von Dein
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package lib
-
-import (
-	"errors"
-	"fmt"
-	"regexp"
-	"strconv"
-
-	"github.com/glycerine/zygomys/zygo"
-)
-
-func Splice2SexpList(list []string) zygo.Sexp {
-	slist := []zygo.Sexp{}
-
-	for _, item := range list {
-		slist = append(slist, &zygo.SexpStr{S: item})
-	}
-
-	return zygo.MakeList(slist)
-}
-
-func StringReSplit(env *zygo.Zlisp, name string, args []zygo.Sexp) (zygo.Sexp, error) {
-	if len(args) < 2 {
-		return zygo.SexpNull, errors.New("expecting 2 arguments")
-	}
-
-	var separator, input string
-
-	switch t := args[0].(type) {
-	case *zygo.SexpStr:
-		input = t.S
-	default:
-		return zygo.SexpNull, errors.New("second argument must be a string")
-	}
-
-	switch t := args[1].(type) {
-	case *zygo.SexpStr:
-		separator = t.S
-	default:
-		return zygo.SexpNull, errors.New("first argument must be a string")
-	}
-
-	sep := regexp.MustCompile(separator)
-
-	return Splice2SexpList(sep.Split(input, -1)), nil
-}
-
-func String2Int(env *zygo.Zlisp, name string, args []zygo.Sexp) (zygo.Sexp, error) {
-	var number int
-
-	switch t := args[0].(type) {
-	case *zygo.SexpStr:
-		num, err := strconv.Atoi(t.S)
-
-		if err != nil {
-			return zygo.SexpNull, fmt.Errorf("failed to convert string to number: %w", err)
-		}
-
-		number = num
-
-	default:
-		return zygo.SexpNull, errors.New("argument must be a string")
-	}
-
-	return &zygo.SexpInt{Val: int64(number)}, nil
-}
-
-func RegisterLib(env *zygo.Zlisp) {
-	env.AddFunction("resplit", StringReSplit)
-	env.AddFunction("atoi", String2Int)
-}
--- a/lib/parser.go
+++ b/lib/parser.go
@@ -1,5 +1,5 @@
 /*
-Copyright © 2022-2024 Thomas von Dein
+Copyright © 2022 Thomas von Dein

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -20,44 +20,61 @@ package lib
 import (
 	"bufio"
 	"encoding/csv"
+	"errors"
 	"fmt"
+	"github.com/alecthomas/repr"
+	"github.com/tlinden/tablizer/cfg"
 	"io"
 	"regexp"
 	"strings"
-
-	"github.com/alecthomas/repr"
-	"github.com/tlinden/tablizer/cfg"
 )

 /*
-Parser switch
+   Parser switch
 */
-func Parse(conf cfg.Config, input io.Reader) (Tabdata, error) {
-	if len(conf.Separator) == 1 {
-		return parseCSV(conf, input)
+func Parse(c cfg.Config, input io.Reader) (Tabdata, error) {
+	if len(c.Separator) == 1 {
+		return parseCSV(c, input)
 	}

-	return parseTabular(conf, input)
+	return parseTabular(c, input)
 }

 /*
-Parse CSV input.
+   Parse CSV input.
 */
-func parseCSV(conf cfg.Config, input io.Reader) (Tabdata, error) {
+func parseCSV(c cfg.Config, input io.Reader) (Tabdata, error) {
+	var content io.Reader = input
 	data := Tabdata{}

-	// apply pattern, if any
-	content, err := FilterByPattern(conf, input)
-	if err != nil {
-		return data, err
+	if len(c.Pattern) > 0 {
+		scanner := bufio.NewScanner(input)
+		lines := []string{}
+		hadFirst := false
+		for scanner.Scan() {
+			line := strings.TrimSpace(scanner.Text())
+			if hadFirst {
+				// don't match 1st line, it's the header
+				if c.PatternR.MatchString(line) == c.InvertMatch {
+					// by default  -v is false, so if a  line does NOT
+					// match the pattern, we will ignore it. However,
+					// if the user specified -v, the matching is inverted,
+					// so we ignore all lines, which DO match.
+					continue
+				}
+			}
+			lines = append(lines, line)
+			hadFirst = true
+		}
+		content = strings.NewReader(strings.Join(lines, "\n"))
 	}

 	csvreader := csv.NewReader(content)
-	csvreader.Comma = rune(conf.Separator[0])
+	csvreader.Comma = rune(c.Separator[0])

 	records, err := csvreader.ReadAll()
 	if err != nil {
-		return data, fmt.Errorf("could not parse CSV input: %w", err)
+		return data, errors.Unwrap(fmt.Errorf("Could not parse CSV input: %w", err))
 	}

 	if len(records) >= 1 {
@@ -77,29 +94,19 @@ func parseCSV(conf cfg.Config, input io.Reader) (Tabdata, error) {
 		}
 	}

-	// apply user defined lisp process hooks, if any
-	userdata, changed, err := RunProcessHooks(conf, data)
-	if err != nil {
-		return data, fmt.Errorf("failed to apply filter hook: %w", err)
-	}
-
-	if changed {
-		data = userdata
-	}
-
 	return data, nil
 }

 /*
-Parse tabular input.
+   Parse tabular input.
 */
-func parseTabular(conf cfg.Config, input io.Reader) (Tabdata, error) {
+func parseTabular(c cfg.Config, input io.Reader) (Tabdata, error) {
 	data := Tabdata{}

 	var scanner *bufio.Scanner

 	hadFirst := false
-	separate := regexp.MustCompile(conf.Separator)
+	separate := regexp.MustCompile(c.Separator)

 	scanner = bufio.NewScanner(input)

@@ -116,6 +123,10 @@ func parseTabular(conf cfg.Config, input io.Reader) (Tabdata, error) {

 			// process all header fields
 			for _, part := range parts {
+				// if Debug {
+				// 	fmt.Printf("Part: <%s>\n", string(line[beg:part[0]]))
+				//}
+
 				// register widest header field
 				headerlen := len(part)
 				if headerlen > data.maxwidthHeader {
@@ -130,24 +141,14 @@ func parseTabular(conf cfg.Config, input io.Reader) (Tabdata, error) {
 			}
 		} else {
 			// data processing
-			if conf.Pattern != "" && matchPattern(conf, line) == conf.InvertMatch {
-				// by default  -v is false, so if a  line does NOT
-				// match the pattern, we will ignore it. However,
-				// if the user specified -v, the matching is inverted,
-				// so we ignore all lines, which DO match.
-				continue
-			}
-
-			// apply user defined lisp filters, if any
-			accept, err := RunFilterHooks(conf, line)
-			if err != nil {
-				return data, fmt.Errorf("failed to apply filter hook: %w", err)
-			}
-
-			if !accept {
-				//  IF there  are filter  hook[s] and  IF one  of them
-				// returns false on the current line, reject it
-				continue
+			if len(c.Pattern) > 0 {
+				if c.PatternR.MatchString(line) == c.InvertMatch {
+					// by default  -v is false, so if a  line does NOT
+					// match the pattern, we will ignore it. However,
+					// if the user specified -v, the matching is inverted,
+					// so we ignore all lines, which DO match.
+					continue
+				}
 			}

 			idx := 0 // we cannot use the header index, because we could exclude columns
@@ -171,30 +172,10 @@ func parseTabular(conf cfg.Config, input io.Reader) (Tabdata, error) {
 	}

 	if scanner.Err() != nil {
-		return data, fmt.Errorf("failed to read from io.Reader: %w", scanner.Err())
+		return data, errors.Unwrap(fmt.Errorf("Failed to read from io.Reader: %w", scanner.Err()))
 	}

-	// filter by field filters, if any
-	filtereddata, changed, err := FilterByFields(conf, data)
-	if err != nil {
-		return data, fmt.Errorf("failed to filter fields: %w", err)
-	}
-
-	if changed {
-		data = filtereddata
-	}
-
-	// apply user defined lisp process hooks, if any
-	userdata, changed, err := RunProcessHooks(conf, data)
-	if err != nil {
-		return data, fmt.Errorf("failed to apply filter hook: %w", err)
-	}
-
-	if changed {
-		data = userdata
-	}
-
-	if conf.Debug {
+	if c.Debug {
 		repr.Print(data)
 	}

--- a/lib/parser_test.go
+++ b/lib/parser_test.go
@@ -19,11 +19,10 @@ package lib

 import (
 	"fmt"
+	"github.com/tlinden/tablizer/cfg"
 	"reflect"
 	"strings"
 	"testing"
-
-	"github.com/tlinden/tablizer/cfg"
 )

 var input = []struct {
@@ -62,12 +61,12 @@ func TestParser(t *testing.T) {
 		},
 	}

-	for _, testdata := range input {
-		testname := fmt.Sprintf("parse-%s", testdata.name)
+	for _, in := range input {
+		testname := fmt.Sprintf("parse-%s", in.name)
 		t.Run(testname, func(t *testing.T) {
-			readFd := strings.NewReader(strings.TrimSpace(testdata.text))
-			conf := cfg.Config{Separator: testdata.separator}
-			gotdata, err := Parse(conf, readFd)
+			readFd := strings.NewReader(strings.TrimSpace(in.text))
+			c := cfg.Config{Separator: in.separator}
+			gotdata, err := Parse(c, readFd)

 			if err != nil {
 				t.Errorf("Parser returned error: %s\nData processed so far: %+v", err, gotdata)
@@ -104,28 +103,28 @@ func TestParserPatternmatching(t *testing.T) {
 		},
 	}

-	for _, inputdata := range input {
-		for _, testdata := range tests {
+	for _, in := range input {
+		for _, tt := range tests {
 			testname := fmt.Sprintf("parse-%s-with-pattern-%s-inverted-%t",
-				inputdata.name, testdata.pattern, testdata.invert)
+				in.name, tt.pattern, tt.invert)
 			t.Run(testname, func(t *testing.T) {
-				conf := cfg.Config{InvertMatch: testdata.invert, Pattern: testdata.pattern,
-					Separator: inputdata.separator}
+				c := cfg.Config{InvertMatch: tt.invert, Pattern: tt.pattern,
+					Separator: in.separator}

-				_ = conf.PreparePattern(testdata.pattern)
+				_ = c.PreparePattern(tt.pattern)

-				readFd := strings.NewReader(strings.TrimSpace(inputdata.text))
-				gotdata, err := Parse(conf, readFd)
+				readFd := strings.NewReader(strings.TrimSpace(in.text))
+				gotdata, err := Parse(c, readFd)

 				if err != nil {
-					if !testdata.want {
+					if !tt.want {
 						t.Errorf("Parser returned error: %s\nData processed so far: %+v",
 							err, gotdata)
 					}
 				} else {
-					if !reflect.DeepEqual(testdata.entries, gotdata.entries) {
+					if !reflect.DeepEqual(tt.entries, gotdata.entries) {
 						t.Errorf("Parser returned invalid data (pattern: %s, invert: %t)\nExp: %+v\nGot: %+v\n",
-							testdata.pattern, testdata.invert, testdata.entries, gotdata.entries)
+							tt.pattern, tt.invert, tt.entries, gotdata.entries)
 					}
 				}
 			})
@@ -152,8 +151,8 @@ asd    igig
 19191  EDD 1  X`

 	readFd := strings.NewReader(strings.TrimSpace(table))
-	conf := cfg.Config{Separator: cfg.DefaultSeparator}
-	gotdata, err := Parse(conf, readFd)
+	c := cfg.Config{Separator: cfg.DefaultSeparator}
+	gotdata, err := Parse(c, readFd)

 	if err != nil {
 		t.Errorf("Parser returned error: %s\nData processed so far: %+v", err, gotdata)
@@ -161,6 +160,6 @@ asd    igig

 	if !reflect.DeepEqual(data, gotdata) {
 		t.Errorf("Parser returned invalid data, Regex: %s\nExp: %+v\nGot: %+v\n",
-			conf.Separator, data, gotdata)
+			c.Separator, data, gotdata)
 	}
 }
--- a/lib/printer.go
+++ b/lib/printer.go
@@ -20,60 +20,62 @@ package lib
 import (
 	"encoding/csv"
 	"fmt"
+	"github.com/gookit/color"
+	"github.com/olekukonko/tablewriter"
+	"github.com/tlinden/tablizer/cfg"
+	"gopkg.in/yaml.v3"
 	"io"
 	"log"
 	"regexp"
 	"strconv"
 	"strings"
-
-	"github.com/gookit/color"
-	"github.com/olekukonko/tablewriter"
-	"github.com/tlinden/tablizer/cfg"
-	"gopkg.in/yaml.v3"
 )

-func printData(writer io.Writer, conf cfg.Config, data *Tabdata) {
+func printData(w io.Writer, c cfg.Config, data *Tabdata) {
+	// some output preparations:
+
 	// add numbers to headers and remove this we're not interested in
-	numberizeAndReduceHeaders(conf, data)
+	numberizeAndReduceHeaders(c, data)

 	// remove unwanted columns, if any
-	reduceColumns(conf, data)
+	reduceColumns(c, data)

 	// sort the data
-	sortTable(conf, data)
+	sortTable(c, data)

-	switch conf.OutputMode {
+	switch c.OutputMode {
 	case cfg.Extended:
-		printExtendedData(writer, conf, data)
-	case cfg.ASCII:
-		printASCIIData(writer, conf, data)
+		printExtendedData(w, c, data)
+	case cfg.Ascii:
+		printAsciiData(w, c, data)
 	case cfg.Orgtbl:
-		printOrgmodeData(writer, conf, data)
+		printOrgmodeData(w, c, data)
 	case cfg.Markdown:
-		printMarkdownData(writer, conf, data)
+		printMarkdownData(w, c, data)
 	case cfg.Shell:
-		printShellData(writer, data)
+		printShellData(w, c, data)
 	case cfg.Yaml:
-		printYamlData(writer, data)
+		printYamlData(w, c, data)
 	case cfg.CSV:
-		printCSVData(writer, data)
+		printCSVData(w, c, data)
 	default:
-		printASCIIData(writer, conf, data)
+		printAsciiData(w, c, data)
 	}
+
 }

-func output(writer io.Writer, str string) {
-	fmt.Fprint(writer, str)
+func output(w io.Writer, str string) {
+	fmt.Fprint(w, str)
 }

 /*
 Emacs org-mode compatible table (also orgtbl-mode)
 */
-func printOrgmodeData(writer io.Writer, conf cfg.Config, data *Tabdata) {
+func printOrgmodeData(w io.Writer, c cfg.Config, data *Tabdata) {
 	tableString := &strings.Builder{}
 	table := tablewriter.NewWriter(tableString)

-	if !conf.NoHeaders {
+	if !c.NoHeaders {
 		table.SetHeader(data.headers)
 	}

@@ -97,8 +99,8 @@ func printOrgmodeData(writer io.Writer, conf cfg.Config, data *Tabdata) {
 	leftR := regexp.MustCompile(`(?m)^\\+`)
 	rightR := regexp.MustCompile(`\\+(?m)$`)

-	output(writer, color.Sprint(
-		colorizeData(conf,
+	output(w, color.Sprint(
+		colorizeData(c,
 			rightR.ReplaceAllString(
 				leftR.ReplaceAllString(tableString.String(), "|"), "|"))))
 }
@@ -106,11 +108,11 @@ func printOrgmodeData(writer io.Writer, conf cfg.Config, data *Tabdata) {
 /*
 Markdown table
 */
-func printMarkdownData(writer io.Writer, conf cfg.Config, data *Tabdata) {
+func printMarkdownData(w io.Writer, c cfg.Config, data *Tabdata) {
 	tableString := &strings.Builder{}
 	table := tablewriter.NewWriter(tableString)

-	if !conf.NoHeaders {
+	if !c.NoHeaders {
 		table.SetHeader(data.headers)
 	}

@@ -122,20 +124,19 @@ func printMarkdownData(writer io.Writer, conf cfg.Config, data *Tabdata) {
 	table.SetCenterSeparator("|")

 	table.Render()
-	output(writer, color.Sprint(colorizeData(conf, tableString.String())))
+	output(w, color.Sprint(colorizeData(c, tableString.String())))
 }

 /*
 Simple ASCII table without any borders etc, just like the input we expect
 */
-func printASCIIData(writer io.Writer, conf cfg.Config, data *Tabdata) {
+func printAsciiData(w io.Writer, c cfg.Config, data *Tabdata) {
 	tableString := &strings.Builder{}
 	table := tablewriter.NewWriter(tableString)

-	if !conf.NoHeaders {
+	if !c.NoHeaders {
 		table.SetHeader(data.headers)
 	}
-
 	table.AppendBulk(data.entries)

 	table.SetAutoWrapText(false)
@@ -147,27 +148,20 @@ func printASCIIData(writer io.Writer, conf cfg.Config, data *Tabdata) {
 	table.SetRowSeparator("")
 	table.SetHeaderLine(false)
 	table.SetBorder(false)
+	table.SetTablePadding("\t") // pad with tabs
 	table.SetNoWhiteSpace(true)

-	if !conf.UseHighlight {
-		// the tabs destroy the highlighting
-		table.SetTablePadding("\t") // pad with tabs
-	} else {
-		table.SetTablePadding("   ")
-	}
-
 	table.Render()
-	output(writer, color.Sprint(colorizeData(conf, tableString.String())))
+	output(w, color.Sprint(colorizeData(c, tableString.String())))
 }

 /*
 We simulate the \x command of psql (the PostgreSQL client)
 */
-func printExtendedData(writer io.Writer, conf cfg.Config, data *Tabdata) {
+func printExtendedData(w io.Writer, c cfg.Config, data *Tabdata) {
 	// needed for data output
 	format := fmt.Sprintf("%%%ds: %%s\n", data.maxwidthHeader)
 	out := ""
-
 	if len(data.entries) > 0 {
 		for _, entry := range data.entries {
 			for i, value := range entry {
@@ -178,71 +172,67 @@ func printExtendedData(writer io.Writer, conf cfg.Config, data *Tabdata) {
 		}
 	}

-	output(writer, colorizeData(conf, out))
+	output(w, colorizeData(c, out))
 }

 /*
 Shell output, ready to be eval'd. Just like FreeBSD stat(1)
 */
-func printShellData(writer io.Writer, data *Tabdata) {
+func printShellData(w io.Writer, c cfg.Config, data *Tabdata) {
 	out := ""
-
 	if len(data.entries) > 0 {
 		for _, entry := range data.entries {
 			shentries := []string{}
-
-			for idx, value := range entry {
+			for i, value := range entry {
 				shentries = append(shentries, fmt.Sprintf("%s=\"%s\"",
-					data.headers[idx], value))
+					data.headers[i], value))
 			}
-
-			out += strings.Join(shentries, " ") + "\n"
+			out += fmt.Sprint(strings.Join(shentries, " ")) + "\n"
 		}
 	}

 	// no colorization here
-	output(writer, out)
+	output(w, out)
 }

-func printYamlData(writer io.Writer, data *Tabdata) {
-	type Data struct {
+func printYamlData(w io.Writer, c cfg.Config, data *Tabdata) {
+	type D struct {
 		Entries []map[string]interface{} `yaml:"entries"`
 	}

-	yamlout := Data{}
+	d := D{}

 	for _, entry := range data.entries {
-		yamldata := map[string]interface{}{}
+		ml := map[string]interface{}{}

-		for idx, entry := range entry {
+		for i, entry := range entry {
 			style := yaml.TaggedStyle
-
 			_, err := strconv.Atoi(entry)
 			if err != nil {
 				style = yaml.DoubleQuotedStyle
 			}

-			yamldata[strings.ToLower(data.headers[idx])] =
+			ml[strings.ToLower(data.headers[i])] =
 				&yaml.Node{
 					Kind:  yaml.ScalarNode,
 					Style: style,
 					Value: entry}
 		}

-		yamlout.Entries = append(yamlout.Entries, yamldata)
+		d.Entries = append(d.Entries, ml)
 	}

-	yamlstr, err := yaml.Marshal(&yamlout)
+	yamlstr, err := yaml.Marshal(&d)

 	if err != nil {
 		log.Fatal(err)
 	}

-	output(writer, string(yamlstr))
+	output(w, string(yamlstr))
 }

-func printCSVData(writer io.Writer, data *Tabdata) {
-	csvout := csv.NewWriter(writer)
+func printCSVData(w io.Writer, c cfg.Config, data *Tabdata) {
+	csvout := csv.NewWriter(w)

 	if err := csvout.Write(data.headers); err != nil {
 		log.Fatalln("error writing record to csv:", err)
--- a/lib/printer_test.go
+++ b/lib/printer_test.go
@@ -20,10 +20,10 @@ package lib
 import (
 	"bytes"
 	"fmt"
+	//"github.com/alecthomas/repr"
+	"github.com/tlinden/tablizer/cfg"
 	"strings"
 	"testing"
-
-	"github.com/tlinden/tablizer/cfg"
 )

 func newData() Tabdata {
@@ -73,7 +73,7 @@ var tests = []struct {
 }{
 	// --------------------- Default settings mode tests ``
 	{
-		mode: cfg.ASCII,
+		mode: cfg.Ascii,
 		name: "default",
 		expect: `
 NAME(1)	DURATION(2)	COUNT(3)	WHEN(4)                    
@@ -250,39 +250,39 @@ DURATION(2)	WHEN(4)
 }

 func TestPrinter(t *testing.T) {
-	for _, testdata := range tests {
+	for _, tt := range tests {
 		testname := fmt.Sprintf("print-sortcol-%d-desc-%t-sortby-%s-mode-%d-usecolumns-%s",
-			testdata.column, testdata.desc, testdata.sortby, testdata.mode, testdata.usecolstr)
+			tt.column, tt.desc, tt.sortby, tt.mode, tt.usecolstr)
 		t.Run(testname, func(t *testing.T) {
 			// replaces os.Stdout, but we ignore it
-			var writer bytes.Buffer
+			var w bytes.Buffer

 			// cmd flags
-			conf := cfg.Config{
-				SortByColumn:   testdata.column,
-				SortDescending: testdata.desc,
-				SortMode:       testdata.sortby,
-				OutputMode:     testdata.mode,
-				NoNumbering:    testdata.nonum,
-				UseColumns:     testdata.usecol,
+			c := cfg.Config{
+				SortByColumn:   tt.column,
+				SortDescending: tt.desc,
+				SortMode:       tt.sortby,
+				OutputMode:     tt.mode,
+				NoNumbering:    tt.nonum,
+				UseColumns:     tt.usecol,
 				NoColor:        true,
 			}

-			conf.ApplyDefaults()
+			c.ApplyDefaults()

 			// the test checks the len!
-			if len(testdata.usecol) > 0 {
-				conf.Columns = "yes"
+			if len(tt.usecol) > 0 {
+				c.Columns = "yes"
 			} else {
-				conf.Columns = ""
+				c.Columns = ""
 			}

-			data := newData()
-			exp := strings.TrimSpace(testdata.expect)
+			testdata := newData()
+			exp := strings.TrimSpace(tt.expect)

-			printData(&writer, conf, &data)
+			printData(&w, c, &testdata)

-			got := strings.TrimSpace(writer.String())
+			got := strings.TrimSpace(w.String())

 			if got != exp {
 				t.Errorf("not rendered correctly:\n+++ got:\n%s\n+++ want:\n%s",
--- a/lib/sort.go
+++ b/lib/sort.go
@@ -18,22 +18,21 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package lib

 import (
+	"github.com/araddon/dateparse"
+	"github.com/tlinden/tablizer/cfg"
 	"regexp"
 	"sort"
 	"strconv"
-
-	"github.com/araddon/dateparse"
-	"github.com/tlinden/tablizer/cfg"
 )

-func sortTable(conf cfg.Config, data *Tabdata) {
-	if conf.SortByColumn <= 0 {
+func sortTable(c cfg.Config, data *Tabdata) {
+	if c.SortByColumn <= 0 {
 		// no sorting wanted
 		return
 	}

 	// slightly modified here to match internal array indicies
-	col := conf.SortByColumn
+	col := c.SortByColumn

 	col-- // ui starts counting by 1, but use 0 internally

@@ -49,42 +48,38 @@ func sortTable(conf cfg.Config, data *Tabdata) {

 	// actual sorting
 	sort.SliceStable(data.entries, func(i, j int) bool {
-		return compare(&conf, data.entries[i][col], data.entries[j][col])
+		return compare(&c, data.entries[i][col], data.entries[j][col])
 	})
 }

 // config is not modified here, but it would be inefficient to copy it every loop
-func compare(conf *cfg.Config, left string, right string) bool {
+func compare(c *cfg.Config, a string, b string) bool {
 	var comp bool

-	switch conf.SortMode {
+	switch c.SortMode {
 	case "numeric":
-		left, err := strconv.Atoi(left)
+		left, err := strconv.Atoi(a)
 		if err != nil {
 			left = 0
 		}
-
-		right, err := strconv.Atoi(right)
+		right, err := strconv.Atoi(b)
 		if err != nil {
 			right = 0
 		}
-
 		comp = left < right
 	case "duration":
-		left := duration2int(left)
-		right := duration2int(right)
-
+		left := duration2int(a)
+		right := duration2int(b)
 		comp = left < right
 	case "time":
-		left, _ := dateparse.ParseAny(left)
-		right, _ := dateparse.ParseAny(right)
-
+		left, _ := dateparse.ParseAny(a)
+		right, _ := dateparse.ParseAny(b)
 		comp = left.Unix() < right.Unix()
 	default:
-		comp = left < right
+		comp = a < b
 	}

-	if conf.SortDescending {
+	if c.SortDescending {
 		comp = !comp
 	}

@@ -92,15 +87,15 @@ func compare(conf *cfg.Config, left string, right string) bool {
 }

 /*
-We could use time.ParseDuration(), but this doesn't support days.
+   We could use time.ParseDuration(), but this doesn't support days.

-We  could also  use github.com/xhit/go-str2duration/v2,  which does
-the job,  but it's  just another dependency,  just for  this little
-gem. And  we don't need a  time.Time value. And int  is good enough
-for duration comparison.
+   We  could also  use github.com/xhit/go-str2duration/v2,  which does
+   the job,  but it's  just another dependency,  just for  this little
+   gem. And  we don't need a  time.Time value. And int  is good enough
+   for duration comparision.

-Convert a  duration into  an integer.  Valid  time units  are "s",
-"m", "h" and "d".
+   Convert a  durartion into  an integer.  Valid  time units  are "s",
+   "m", "h" and "d".
 */
 func duration2int(duration string) int {
 	re := regexp.MustCompile(`(\d+)([dhms])`)
@@ -108,17 +103,16 @@ func duration2int(duration string) int {

 	for _, match := range re.FindAllStringSubmatch(duration, -1) {
 		if len(match) == 3 {
-			durationvalue, _ := strconv.Atoi(match[1])
-
+			v, _ := strconv.Atoi(match[1])
 			switch match[2][0] {
 			case 'd':
-				seconds += durationvalue * 86400
+				seconds += v * 86400
 			case 'h':
-				seconds += durationvalue * 3600
+				seconds += v * 3600
 			case 'm':
-				seconds += durationvalue * 60
+				seconds += v * 60
 			case 's':
-				seconds += durationvalue
+				seconds += v
 			}
 		}
 	}
--- a/lib/sort_test.go
+++ b/lib/sort_test.go
@@ -19,9 +19,8 @@ package lib

 import (
 	"fmt"
-	"testing"
-
 	"github.com/tlinden/tablizer/cfg"
+	"testing"
 )

 func TestDuration2Seconds(t *testing.T) {
@@ -37,12 +36,12 @@ func TestDuration2Seconds(t *testing.T) {
 		{"19t77X what?4s", 4},
 	}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("duration-%s", testdata.dur)
+	for _, tt := range tests {
+		testname := fmt.Sprintf("duration-%s", tt.dur)
 		t.Run(testname, func(t *testing.T) {
-			seconds := duration2int(testdata.dur)
-			if seconds != testdata.expect {
-				t.Errorf("got %d, want %d", seconds, testdata.expect)
+			seconds := duration2int(tt.dur)
+			if seconds != tt.expect {
+				t.Errorf("got %d, want %d", seconds, tt.expect)
 			}
 		})
 	}
@@ -67,15 +66,13 @@ func TestCompare(t *testing.T) {
 		{"time", "12/24/2022", "1/1/1970", true, true},
 	}

-	for _, testdata := range tests {
-		testname := fmt.Sprintf("compare-mode-%s-a-%s-b-%s-desc-%t",
-			testdata.mode, testdata.a, testdata.b, testdata.desc)
-
+	for _, tt := range tests {
+		testname := fmt.Sprintf("compare-mode-%s-a-%s-b-%s-desc-%t", tt.mode, tt.a, tt.b, tt.desc)
 		t.Run(testname, func(t *testing.T) {
-			c := cfg.Config{SortMode: testdata.mode, SortDescending: testdata.desc}
-			got := compare(&c, testdata.a, testdata.b)
-			if got != testdata.want {
-				t.Errorf("got %t, want %t", got, testdata.want)
+			c := cfg.Config{SortMode: tt.mode, SortDescending: tt.desc}
+			got := compare(&c, tt.a, tt.b)
+			if got != tt.want {
+				t.Errorf("got %t, want %t", got, tt.want)
 			}
 		})
 	}
--- a/t/plugintest.zy
+++ b/t/plugintest.zy
@@ -1,10 +0,0 @@
-/*
-Simple filter hook function. Splits the argument by whitespace,
-fetches the 2nd element, converts it to an int and returns true
-if it s larger than 5, false otherwise.
-*/
-(defn uselarge [line]
-  (cond (> (atoi (second (resplit line `\s+`))) 5) true false))
-
-/* Register the filter hook */
-(addhook %filter %uselarge)
--- a/t/test.sh
+++ b/t/test.sh
@@ -30,14 +30,14 @@ cd $(dirname $0)
 echo "Executing commandline tests ..."

 # io pattern tests
-ex io-pattern-and-file $t bk7 testtable
-cat testtable | ex io-pattern-and-stdin $t bk7
-cat testtable | ex io-pattern-and-stdin-dash $t bk7 -
+ex io-pattern-and-file $t bk7 testtable.kube
+cat testtable.kube | ex io-pattern-and-stdin $t bk7
+cat testtable.kube | ex io-pattern-and-stdin-dash $t bk7 -

 # same w/o pattern
-ex io-just-file $t testtable
-cat testtable | ex io-just-stdin $t
-cat testtable | ex io-just-stdin-dash $t -
+ex io-just-file $t testtable.kube
+cat testtable.kube | ex io-just-stdin $t
+cat testtable.kube | ex io-just-stdin-dash $t -

 if test $fail -ne 0; then
    echo "!!! Some tests failed !!!"
--- a/t/testtable2
+++ b/t/testtable2
@@ -1,6 +0,0 @@
-NAME  DURATION
-x     10
-a     100
-z     0
-u     4
-k     6
--- a/tablizer.1
+++ b/tablizer.1
@@ -133,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "TABLIZER 1"
-.TH TABLIZER 1 "2024-05-07" "1" "User Commands"
+.TH TABLIZER 1 "2023-04-21" "1" "User Commands"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -151,21 +151,18 @@ tablizer \- Manipulate tabular output of other programs
 \&      \-v, \-\-invert\-match       select non\-matching rows
 \&      \-n, \-\-no\-numbering       Disable header numbering
 \&      \-N, \-\-no\-color           Disable pattern highlighting
-\&      \-H, \-\-no\-headers         Disable headers display
+\&          \-\-no\-headers         Disable headers display
 \&      \-s, \-\-separator string   Custom field separator
 \&      \-k, \-\-sort\-by int        Sort by column (default: 1)
-\&      \-z, \-\-fuzzy              Use fuzzy search [experimental]
-\&      \-F, \-\-filter field=reg   Filter given field with regex, can be used multiple times
 \&
 \&    Output Flags (mutually exclusive):
 \&      \-X, \-\-extended           Enable extended output
 \&      \-M, \-\-markdown           Enable markdown table output
 \&      \-O, \-\-orgtbl             Enable org\-mode table output
-\&      \-S, \-\-shell              Enable shell evaluable output
+\&      \-S, \-\-shell              Enable shell evaluable ouput
 \&      \-Y, \-\-yaml               Enable yaml output
 \&      \-C, \-\-csv                Enable CSV output
 \&      \-A, \-\-ascii              Default output mode, ascii tabular
-\&      \-L, \-\-hightlight\-lines   Use alternating background colors for tables
 \&
 \&    Sort Mode Flags (mutually exclusive):
 \&      \-a, \-\-sort\-age           sort according to age (duration) string
@@ -175,11 +172,10 @@ tablizer \- Manipulate tabular output of other programs
 \&
 \&    Other Flags:
 \&          \-\-completion <shell> Generate the autocompletion script for <shell>
-\&      \-f, \-\-config <file>      Configuration file (default: ~/.config/tablizer/config)
 \&      \-d, \-\-debug              Enable debugging
 \&      \-h, \-\-help               help for tablizer
 \&      \-m, \-\-man                Display manual page
-\&      \-V, \-\-version            Print program version
+\&      \-v, \-\-version            Print program version
 .Ve
 .SH "DESCRIPTION"
 .IX Header "DESCRIPTION"
@@ -240,9 +236,9 @@ the original order.
 The numbering can be suppressed by using the \fB\-n\fR option.
 .PP
 By  default tablizer  shows  a  header containing  the  names of  each
-column.  This can  be disabled using the \fB\-H\fR option.   Be aware that
-this only affects tabular output modes.  Shell, Extended, Yaml and \s-1CSV\s0
-output modes always use the column names.
+column.  This  can be disabled  using the \fB\-\-no\-headers\fR  option.  Be
+aware that  this only affects  tabular output modes.  Shell, Extended,
+Yaml and \s-1CSV\s0 output modes always use the column names.
 .PP
 By  default, if  a  \fBpattern\fR  has been  speficied,  matches will  be
 highlighted. You can disable this behavior with the \fB\-N\fR option.
@@ -265,8 +261,8 @@ Sorts timestamps.
 .PP
 Finally the  \fB\-d\fR option  enables debugging  output which  is mostly
 useful for the developer.
-.SS "\s-1PATTERNS AND FILTERING\s0"
-.IX Subsection "PATTERNS AND FILTERING"
+.SS "\s-1PATTERNS\s0"
+.IX Subsection "PATTERNS"
 You can reduce the rows being  displayed by using a regular expression
 pattern.  The  regexp is  \s-1PCRE\s0 compatible, refer  to the  syntax cheat
 sheet here: <https://github.com/google/re2/wiki/Syntax>.  If you want
@@ -297,25 +293,6 @@ Example for a case insensitive search:
 .Vb 1
 \&    kubectl get pods \-A | tablizer "(?i)account"
 .Ve
-.PP
-You  can use  the experimental  fuzzy search  feature by  providing the
-option \fB\-z\fR, in which case the  pattern is regarded as a fuzzy search
-term, not a regexp.
-.PP
-Sometimes you want to  filter by one or more columns.  You can do that
-using the \fB\-F\fR option. The option can be specified multiple times and
-has the following format:
-.PP
-.Vb 1
-\&    fieldname=regexp
-.Ve
-.PP
-Fieldnames (== columns headers) are case insensitive.
-.PP
-If you specify more than one filter, both filters have to match (\s-1AND\s0
-operation).
-.PP
-If the option \fB\-v\fR is specified, the filtering is inverted.
 .SS "\s-1COLUMNS\s0"
 .IX Subsection "COLUMNS"
 The  parameter  \fB\-c\fR  can  be  used  to  specify,  which  columns  to
@@ -462,38 +439,6 @@ To load completions for every new session, run:
 .Ve
 .Sp
 and source this file from your PowerShell profile.
-.SH "CONFIGURATION AND COLORS"
-.IX Header "CONFIGURATION AND COLORS"
-YOu can put certain configuration values into a configuration file in
-\&\s-1HCL\s0 format. By default tablizer looks for
-\&\f(CW\*(C`$HOME/.config/tablizer/config\*(C'\fR, but you can provide one using the
-parameter \f(CW\*(C`\-f\*(C'\fR.
-.PP
-In the configuration the following variables can be defined:
-.PP
-.Vb 8
-\&    BG             = "lightGreen"
-\&    FG             = "white"
-\&    HighlightBG    = "lightGreen"
-\&    HighlightFG    = "white"
-\&    NoHighlightBG  = "white"
-\&    NoHighlightFG  = "lightGreen"
-\&    HighlightHdrBG = "red"
-\&    HighlightHdrFG = "white"
-.Ve
-.PP
-The following color definitions are available:
-.PP
-black, blue,  cyan, darkGray, default, green,  lightBlue, lightCyan,
-lightGreen,   lightMagenta,   lightRed,   lightWhite,   lightYellow,
-magenta, red, white, yellow
-.PP
-The Variables \fB\s-1FG\s0\fR and \fB\s-1BG\s0\fR are being used to highlight matches. The
-other *FG and *BG variables are for colored table output (enabled with
-the \f(CW\*(C`\-L\*(C'\fR parameter).
-.PP
-Colorization can be turned off completely either by setting the
-parameter \f(CW\*(C`\-N\*(C'\fR or the environment variable \fB\s-1NO_COLOR\s0\fR to a true value.
 .SH "BUGS"
 .IX Header "BUGS"
 In order to report a bug, unexpected behavior, feature requests
@@ -503,7 +448,7 @@ or to submit a patch, please open an issue on github:
 .IX Header "LICENSE"
 This software is licensed under the \s-1GNU GENERAL PUBLIC LICENSE\s0 version 3.
 .PP
-Copyright (c) 2022\-2024 by Thomas von Dein
+Copyright (c) 2023 by Thomas von Dein
 .PP
 This software uses the following \s-1GO\s0 modules:
 .IP "repr (https://github.com/alecthomas/repr)" 4
--- a/tablizer.pod
+++ b/tablizer.pod
@@ -12,21 +12,18 @@ tablizer - Manipulate tabular output of other programs
      -v, --invert-match       select non-matching rows
      -n, --no-numbering       Disable header numbering
      -N, --no-color           Disable pattern highlighting
-      -H, --no-headers         Disable headers display
+          --no-headers         Disable headers display
      -s, --separator string   Custom field separator
      -k, --sort-by int        Sort by column (default: 1)
-      -z, --fuzzy              Use fuzzy search [experimental]
-      -F, --filter field=reg   Filter given field with regex, can be used multiple times

    Output Flags (mutually exclusive):
      -X, --extended           Enable extended output
      -M, --markdown           Enable markdown table output
      -O, --orgtbl             Enable org-mode table output
-      -S, --shell              Enable shell evaluable output
+      -S, --shell              Enable shell evaluable ouput
      -Y, --yaml               Enable yaml output
      -C, --csv                Enable CSV output
      -A, --ascii              Default output mode, ascii tabular
-      -L, --hightlight-lines   Use alternating background colors for tables

    Sort Mode Flags (mutually exclusive):
      -a, --sort-age           sort according to age (duration) string
@@ -36,11 +33,10 @@ tablizer - Manipulate tabular output of other programs

    Other Flags:
          --completion <shell> Generate the autocompletion script for <shell>
-      -f, --config <file>      Configuration file (default: ~/.config/tablizer/config)
      -d, --debug              Enable debugging
      -h, --help               help for tablizer
      -m, --man                Display manual page
-      -V, --version            Print program version
+      -v, --version            Print program version


 =head1 DESCRIPTION
@@ -96,9 +92,9 @@ the original order.
 The numbering can be suppressed by using the B<-n> option.

 By  default tablizer  shows  a  header containing  the  names of  each
-column.  This can  be disabled using the B<-H> option.   Be aware that
-this only affects tabular output modes.  Shell, Extended, Yaml and CSV
-output modes always use the column names.
+column.  This  can be disabled  using the B<--no-headers>  option.  Be
+aware that  this only affects  tabular output modes.  Shell, Extended,
+Yaml and CSV output modes always use the column names.

 By  default, if  a  B<pattern>  has been  speficied,  matches will  be
 highlighted. You can disable this behavior with the B<-N> option.
@@ -129,7 +125,7 @@ Sorts timestamps.
 Finally the  B<-d> option  enables debugging  output which  is mostly
 useful for the developer.

-=head2 PATTERNS AND FILTERING
+=head2 PATTERNS

 You can reduce the rows being  displayed by using a regular expression
 pattern.  The  regexp is  PCRE compatible, refer  to the  syntax cheat
@@ -156,23 +152,6 @@ Example for a case insensitive search:

    kubectl get pods -A | tablizer "(?i)account"

-You  can use  the experimental  fuzzy search  feature by  providing the
-option B<-z>, in which case the  pattern is regarded as a fuzzy search
-term, not a regexp.
-
-Sometimes you want to  filter by one or more columns.  You can do that
-using the B<-F> option. The option can be specified multiple times and
-has the following format:
-
-    fieldname=regexp
-
-Fieldnames (== columns headers) are case insensitive.
-
-If you specify more than one filter, both filters have to match (AND
-operation).
-
-If the option B<-v> is specified, the filtering is inverted.
-

 =head2 COLUMNS

@@ -310,37 +289,6 @@ and source this file from your PowerShell profile.

 =back

-=head1 CONFIGURATION AND COLORS
-
-YOu can put certain configuration values into a configuration file in
-HCL format. By default tablizer looks for
-C<$HOME/.config/tablizer/config>, but you can provide one using the
-parameter C<-f>.
-
-In the configuration the following variables can be defined:
-
-    BG             = "lightGreen"
-    FG             = "white"
-    HighlightBG    = "lightGreen"
-    HighlightFG    = "white"
-    NoHighlightBG  = "white"
-    NoHighlightFG  = "lightGreen"
-    HighlightHdrBG = "red"
-    HighlightHdrFG = "white"
-
-The following color definitions are available:
-
-black, blue,  cyan, darkGray, default, green,  lightBlue, lightCyan,
-lightGreen,   lightMagenta,   lightRed,   lightWhite,   lightYellow,
-magenta, red, white, yellow
-
-The Variables B<FG> and B<BG> are being used to highlight matches. The
-other *FG and *BG variables are for colored table output (enabled with
-the C<-L> parameter).
-
-Colorization can be turned off completely either by setting the
-parameter C<-N> or the environment variable B<NO_COLOR> to a true value.
-
 =head1 BUGS

 In order to report a bug, unexpected behavior, feature requests
@@ -351,7 +299,7 @@ L<https://github.com/TLINDEN/tablizer/issues>.

 This software is licensed under the GNU GENERAL PUBLIC LICENSE version 3.

-Copyright (c) 2022-2024 by Thomas von Dein
+Copyright (c) 2023 by Thomas von Dein

 This software uses the following GO modules: