fix linter errors

2025-12-17 12:31:04 +01:00 · 2024-01-26 13:08:15 +01:00
48 changed files with 467 additions and 792 deletions
--- a/.gh-dash.yml
+++ b/.gh-dash.yml
@@ -1,96 +0,0 @@
-prSections:
-  - title: Responsible PRs
-    filters: repo:tlinden/rpnc is:open NOT dependabot
-    layout:
-      repoName:
-        hidden: true
-
-  - title: Responsible Dependabot PRs
-    filters: repo:tlinden/rpnc is:open dependabot
-    layout:
-      repoName:
-        hidden: true
-
-issuesSections:
-  - title: Responsible Issues
-    filters: is:open repo:tlinden/rpnc -author:@me
-    layout:
-      repoName:
-        hidden: true
-
-  - title: Note-to-Self Issues
-    filters: is:open repo:tlinden/rpnc author:@me
-    layout:
-      creator:
-        hidden: true
-      repoName:
-        hidden: true
-
-defaults:
-  preview:
-    open: false
-    width: 100
-
-keybindings:
-  universal:
-    - key: "shift+down"
-      builtin: pageDown
-    - key: "shift+up"
-      builtin: pageUp
-  prs:
-    - key: g
-      name: gitu
-      command: >
-        cd {{.RepoPath}} && /home/scip/bin/gitu
-    - key: M
-      name: squash-merge
-      command: gh pr merge --rebase --squash --admin --repo {{.RepoName}} {{.PrNumber}}
-    - key: i
-      name: show ci checks
-      command: gh pr checks --repo {{.RepoName}} {{.PrNumber}} | glow -p
-    - key: e
-      name: edit pr
-      command: ~/.config/gh-dash/edit-gh-pr {{.RepoName}} {{.PrNumber}}
-    - key: E
-      name: open repo in emacs
-      command: emacsclient {{.RepoPath}} &
-  issues:
-    - key: v
-      name: view
-      command: gh issue view --repo {{.RepoName}} {{.IssueNumber}} | glow -p
-    - key: l
-      name: add label
-      command: gh issue --repo {{.RepoName}} edit {{.IssueNumber}} --add-label $(gum choose bug enhancement question dependencies wontfix)
-    - key: L
-      name: remove label
-      command: gh issue --repo {{.RepoName}} edit {{.IssueNumber}} --remove-label $(gum choose bug enhancement question dependencies wontfix)
-    - key: E
-      name: open repo in emacs
-      command: emacsclient {{.RepoPath}} &
-
-theme:
-  ui:
-    sectionsShowCount: true
-    table:
-      compact: false
-      showSeparator: true
-  colors:
-    text:
-      primary: "#E2E1ED"
-      secondary: "#6770cb"
-      inverted: "#242347"
-      faint: "#b0793b"
-      warning: "#E0AF68"
-      success: "#3DF294"
-    background:
-      selected: "#1B1B33"
-    border:
-      primary: "#383B5B"
-      secondary: "#39386B"
-      faint: "#8d3e0b"
-
-repoPaths: 
-    :owner/:repo: ~/dev/:repo
-
-pager:
-  diff: delta
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,31 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[bug-report]"
+labels: bug
+assignees: TLINDEN
+
+---
+
+**Describtion**
+<!-- Please provide a clear and concise description of the issue: -->
+
+
+**Steps To Reproduce**
+<!-- Please detail the steps to reproduce the behavior: -->
+
+
+**Expected behavior**
+<!-- What do you expected to happen instead? -->
+
+
+**Version information**
+<!--
+Please provide as much version information as possible:
+- if you have just installed a binary, provide the output of: rpn -v
+- if you installed from source, provide the output of: make show-version
+- provide additional details: operating system and version and shell environment
+-->
+
+
+**Additional informations**
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: Suggest a feature
+title: "[feature-request]"
+labels: feature-request
+assignees: TLINDEN
+
+---
+
+**Describtion**
+<!-- Please provide a clear and concise description of the feature you desire: -->
+
+
+
+**Version information**
+<!--
+Just in case the feature is already present, please provide as
+much version information as possible:
+- if you have just installed a binary, provide the output of: rpn -v
+- if you installed from source, provide the output of: make show-version
+- provide additional details: operating system and version and shell environment
+-->
+
--- 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
@@ -0,0 +1,36 @@
+name: build-and-test-rpn
+on: [push, pull_request]
+jobs:
+  build:
+    strategy:
+      matrix:
+        version: [1.21]
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    name: Build
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Set up Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: ${{ matrix.version }}
+      id: go
+
+    - name: checkout
+      uses: actions/checkout@v3
+
+    - name: build
+      run: go build
+
+    - name: test
+      run: make test
+
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.21
+      - uses: actions/checkout@v3
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -1,69 +0,0 @@
-# vim: set ts=2 sw=2 tw=0 fo=cnqoj
-
-version: 2
-
-before:
-  hooks:
-    - go mod tidy
-
-gitea_urls:
-  api: https://codeberg.org/api/v1
-  download: https://codeberg.org
-  
-builds:
-  - env:
-      - CGO_ENABLED=0
-    goos:
-      - linux
-      - windows
-      - darwin
-      - freebsd
-
-archives:
-  - formats: [tar.gz]
-    # this name template makes the OS and Arch compatible with the results of `uname`.
-    name_template: >-
-      {{ .ProjectName }}_
-      {{- title .Os }}_
-      {{- if eq .Arch "amd64" }}x86_64
-      {{- else if eq .Arch "386" }}i386
-      {{- else }}{{ .Arch }}{{ end }}
-      {{- if .Arm }}v{{ .Arm }}{{ end }}_{{ .Tag }}
-    # use zip for windows archives
-    format_overrides:
-      - goos: windows
-        formats: [zip]
-      - goos: linux
-        formats: [tar.gz,binary]
-    files:
-      - src: "*.md"
-        strip_parent: true
-      - src: "docs/*"
-        strip_parent: true
-      - src: Makefile.dist
-        dst: Makefile
-    wrap_in_directory: true
-
-changelog:
-  sort: asc
-  filters:
-    exclude:
-      - "^docs:"
-      - "^test:"
-  groups:
-    - title: Improved
-      regexp: '^.*?(feat|add|new)(\([[:word:]]+\))??!?:.+$'
-      order: 0
-    - title: Fixed
-      regexp: '^.*?(bug|fix)(\([[:word:]]+\))??!?:.+$'
-      order: 1
-    - title: Changed
-      order: 999
-
-release:
-  header: "# Release Notes"
-  footer: >-
-
-    ---
-
-    Full Changelog: [{{ .PreviousTag }}...{{ .Tag }}](https://codeberg.org/scip/rpnc/compare/{{ .PreviousTag }}...{{ .Tag }})
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -1,27 +0,0 @@
-matrix:
-  platform:
-    - linux/amd64
-  goversion:
-    - 1.24
-
-labels:
-  platform: ${platform}
-    
-steps:
-  build:
-    when:
-      event: [push]
-    image: golang:${goversion}
-    commands:
-      - go get
-      - go build
-      - go test
-
-  linter:
-    when:
-      event: [push]
-    image: golang:${goversion}
-    commands:
-      - curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.5.0
-      - golangci-lint --version
-      - golangci-lint run ./...
--- a/.woodpecker/release.yaml
+++ b/.woodpecker/release.yaml
@@ -1,15 +0,0 @@
-# build release
-
-labels:
-  platform: linux/amd64
-    
-steps:
-  goreleaser:
-    image: goreleaser/goreleaser
-    when:
-      event: [tag]
-    environment:
-      GITEA_TOKEN:
-        from_secret: DEPLOY_TOKEN
-    commands:
-      - goreleaser release --clean --verbose
--- a/18
+++ b/18
@@ -25,20 +25,20 @@ UID       = root
 GID       = 0
 HAVE_POD := $(shell pod2text -h 2>/dev/null)

-all: $(tool).1 cmd/$(tool).go buildlocal
+all: $(tool).1 $(tool).go buildlocal

 %.1: %.pod
 ifdef HAVE_POD
 	  pod2man -c "User Commands" -r 1 -s 1 $*.pod > $*.1
 endif

-cmd/%.go: %.pod
+%.go: %.pod
 ifdef HAVE_POD
-	  echo "package main" > cmd/$*.go
-	  echo >> cmd/$*.go
-	  echo "var manpage = \`" >> cmd/$*.go
-	  pod2text cmd/$*.pod >> cmd/$*.go
-	  echo "\`" >> cmd/$*.go
+	  echo "package main" > $*.go
+	  echo >> $*.go
+	  echo "var manpage = \`" >> $*.go
+	  pod2text $*.pod >> $*.go
+	  echo "\`" >> $*.go
 endif

 buildlocal:
@@ -81,8 +81,8 @@ goupdate:
 buildall:
 	./mkrel.sh $(tool) $(VERSION)

-release:
-	gh release create v$(VERSION) --generate-notes
+release: buildall
+	gh release create v$(VERSION) --generate-notes releases/*

 show-versions: buildlocal
 	@echo "### rpn version:"
--- a/Makefile.dist
+++ b/Makefile.dist
@@ -1,20 +0,0 @@
-# -*-make-*-
-
-.PHONY: install all
-
-tool   = rpn
-PREFIX = /usr/local
-UID    = root
-GID    = 0
-
-all:
-	@echo "Type 'sudo make install' to install the tool."
-	@echo "To change prefix, type 'sudo make install PREFIX=/opt'"
-
-install:
-	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
-	install -d -o $(UID) -g $(GID) $(PREFIX)/man/man1
-	install -d -o $(UID) -g $(GID) $(PREFIX)/share/doc
-	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
-	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/
-	install -o $(UID) -g $(GID) -m 444 *.md $(PREFIX)/share/doc/
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 ## Programmable command-line calculator using reverse polish notation

-[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://codeberg.org/scip/rpnc/raw/branch/master/LICENSE)
-[![Go Report Card](https://goreportcard.com/badge/codeberg.org/scip/rpnc)](https://goreportcard.com/report/codeberg.org/scip/rpnc) 
+[![Actions](https://github.com/tlinden/rpnc/actions/workflows/ci.yaml/badge.svg)](https://github.com/tlinden/rpnc/actions)
+[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/tlinden/rpnc/blob/master/LICENSE)
+[![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/rpnc)](https://goreportcard.com/report/github.com/tlinden/rpnc) 

 This is a small commandline calculator which takes its input in
 [reverse polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation)
@@ -9,7 +10,6 @@ form.

 Features:

-
 - unlimited stack
 - undo
 - various stack manipulation commands
@@ -23,7 +23,6 @@ Features:
 - history
 - comments (comment character is `#`)
 - variables
- help screen uses comfortable internal pager

 ## Demo

@@ -247,12 +246,7 @@ connection to the outside!**

 There are multiple ways to install **rpn**:

- You can use [stew](https://github.com/marwanhawari/stew) to install rpnc:
-  ```default
-  stew install tlinden/rpnc
-  ```
-
- Go to the [latest release page](https://codeberg.org/scip/rpn/releases/latest),
+- Go to the [latest release page](https://github.com/tlinden/rpn/releases/latest),
  locate the binary for your operating system and platform.
  
  Download it and put it into some directory within your `$PATH` variable.
@@ -265,7 +259,7 @@ There are multiple ways to install **rpn**:
  
 - You can also install from source. Issue the following commands in your shell:
  ```
-  git clone https://codeberg.org/scip/rpn.git
+  git clone https://github.com/TLINDEN/rpn.git
  cd rpn
  make
  sudo make install
@@ -279,7 +273,7 @@ hesitate to ask me about it, I'll add it.

 The  documentation  is  provided  as  a unix  man-page.   It  will  be
 automatically installed if  you install from source.  However, you can
-[read the man-page online](https://codeberg.org/scip/rpnc/raw/branch/master/rpn.pod)
+[read the man-page online](https://github.com/TLINDEN/rpnc/blob/master/rpn.pod)

 Or if you cloned  the repository you can read it  this way (perl needs
 to be installed though): `perldoc rpn.pod`.
@@ -296,7 +290,7 @@ best way for me to forget to do something.

 In order to report a bug,  unexpected behavior, feature requests or to
 submit    a    patch,    please    open   an    issue    on    github:
-https://codeberg.org/scip/rpnc/issues.
+https://github.com/TLINDEN/rpnc/issues.

 ## Copyright and license

@@ -308,4 +302,4 @@ T.v.Dein <tom AT vondein DOT org>

 ## Project homepage

-https://codeberg.org/scip/rpnc
+https://github.com/TLINDEN/rpnc
--- a/cmd/calc.go
+++ b/cmd/calc.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"errors"
@@ -78,12 +78,6 @@ erf erfc  erfcinv erfinv exp  exp2 expm1 floor  gamma ilogb j0  j1 log
 log10 log1p log2 logb pow round roundtoeven sin sinh tan tanh trunc y0
 y1 copysign dim hypot

-Converter functions:
-cm-to-inch              yards-to-meters         bytes-to-kilobytes
-inch-to-cm              meters-to-yards         bytes-to-megabytes
-gallons-to-liters       miles-to-kilometers     bytes-to-gigabytes
-liters-to-gallons       kilometers-to-miles     bytes-to-terabytes
-
 Batch functions:
 sum                  sum of all values (alias: +)
 max                  max of all values
@@ -278,18 +272,9 @@ func (c *Calc) EvalItem(item string) error {
 		return nil
 	}

-	// try time
-	var hour, min int
-	_, err = fmt.Sscanf(item, "%d:%d", &hour, &min)
-	if err == nil {
-		c.stack.Backup()
-		c.stack.Push(float64(hour) + float64(min)/60)
-
-		return nil
-	}
-
 	// try hex
 	var i int
+
 	_, err = fmt.Sscanf(item, "0x%x", &i)
 	if err == nil {
 		c.stack.Backup()
@@ -376,7 +361,9 @@ func (c *Calc) EvalItem(item string) error {
 	}

 	switch item {
-	case "?", "help":
+	case "?":
+		fallthrough
+	case "help":
 		c.PrintHelp()

 	default:
@@ -585,40 +572,46 @@ func sortcommands(hash Commands) []string {
 }

 func (c *Calc) PrintHelp() {
-	output := "Available configuration commands:\n"
+	fmt.Println("Available configuration commands:")

 	for _, name := range sortcommands(c.SettingsCommands) {
-		output += fmt.Sprintf("%-20s %s\n", name, c.SettingsCommands[name].Help)
+		fmt.Printf("%-20s %s\n", name, c.SettingsCommands[name].Help)
 	}

-	output += "\nAvailable show commands:\n"
+	fmt.Println()
+
+	fmt.Println("Available show commands:")

 	for _, name := range sortcommands(c.ShowCommands) {
-		output += fmt.Sprintf("%-20s %s\n", name, c.ShowCommands[name].Help)
+		fmt.Printf("%-20s %s\n", name, c.ShowCommands[name].Help)
 	}

-	output += "\nAvailable stack manipulation commands:\n"
+	fmt.Println()
+
+	fmt.Println("Available stack manipulation commands:")

 	for _, name := range sortcommands(c.StackCommands) {
-		output += fmt.Sprintf("%-20s %s\n", name, c.StackCommands[name].Help)
+		fmt.Printf("%-20s %s\n", name, c.StackCommands[name].Help)
 	}

-	output += "\nOther commands:\n"
+	fmt.Println()
+
+	fmt.Println("Other commands:")

 	for _, name := range sortcommands(c.Commands) {
-		output += fmt.Sprintf("%-20s %s\n", name, c.Commands[name].Help)
+		fmt.Printf("%-20s %s\n", name, c.Commands[name].Help)
 	}

-	output += "\n" + Help
+	fmt.Println()
+
+	fmt.Println(Help)

 	// append lua functions, if any
 	if len(LuaFuncs) > 0 {
-		output += "\nLua functions:\n"
+		fmt.Println("Lua functions:")

 		for name, function := range LuaFuncs {
-			output += fmt.Sprintf("%-20s %s\n", name, function.help)
+			fmt.Printf("%-20s %s\n", name, function.help)
 		}
 	}
-
-	Pager("rpn help overview", output)
 }
--- a/cmd/calc_test.go
+++ b/cmd/calc_test.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"fmt"
@@ -78,7 +78,7 @@ func TestCommentsAndWhitespace(t *testing.T) {
 		t.Run(testname, func(t *testing.T) {
 			for _, line := range test.cmd {
 				if err := calc.Eval(line); err != nil {
-					t.Error(err.Error())
+					t.Errorf(err.Error())
 				}
 			}
 			got := calc.stack.Last()
@@ -292,7 +292,7 @@ func TestCalc(t *testing.T) {
 		t.Run(testname, func(t *testing.T) {
 			calc.batch = test.batch
 			if err := calc.Eval(test.cmd); err != nil {
-				t.Error(err.Error())
+				t.Errorf(err.Error())
 			}
 			got := calc.Result()
 			calc.stack.Clear()
@@ -327,7 +327,7 @@ func TestCalcLua(t *testing.T) {
 	LuaInterpreter = lua.NewState(lua.Options{SkipOpenLibs: true})
 	defer LuaInterpreter.Close()

-	luarunner := NewInterpreter("../example.lua", false)
+	luarunner := NewInterpreter("example.lua", false)
 	luarunner.InitLua()
 	calc.SetInt(luarunner)

@@ -373,8 +373,6 @@ func FuzzEval(f *testing.F) {
 		"b",
 		"#444",
 		"<X",
-		"?",
-		"help",
 	}

 	for _, item := range legal {
@@ -383,21 +381,16 @@ func FuzzEval(f *testing.F) {

 	calc := NewCalc()

-	var hexnum, hour, min int
+	var hexnum int

 	f.Fuzz(func(t *testing.T, line string) {
-		t.Logf("Stack:\n%v\nLine: <%s>\n", calc.stack.All(), line)
-		switch line {
-		case "help", "?":
-			return
-		}
+		t.Logf("Stack:\n%v\n", calc.stack.All())
 		if err := calc.EvalItem(line); err == nil {
 			t.Logf("given: <%s>", line)
 			// not corpus and empty?
 			if !contains(legal, line) && len(line) > 0 {
 				item := strings.TrimSpace(calc.Comment.ReplaceAllString(line, ""))
 				_, hexerr := fmt.Sscanf(item, "0x%x", &hexnum)
-				_, timeerr := fmt.Sscanf(item, "%d:%d", &hour, &min)
 				// no comment?
 				if len(item) > 0 {
 					// no known command or function?
@@ -412,8 +405,7 @@ func FuzzEval(f *testing.F) {
 							!exists(calc.StackCommands, item) &&
 							!calc.Register.MatchString(item) &&
 							item != "?" && item != "help" &&
-							hexerr != nil &&
-							timeerr != nil {
+							hexerr != nil {
 							t.Errorf("Fuzzy input accepted: <%s>", line)
 						}
 					}
--- a/cmd/pager.go
+++ b/cmd/pager.go
@@ -1,120 +0,0 @@
-package cmd
-
-// pager setup using bubbletea
-// file shamlelessly copied from:
-// https://github.com/charmbracelet/bubbletea/tree/main/examples/pager
-
-import (
-	"fmt"
-	"os"
-	"strings"
-
-	"github.com/charmbracelet/bubbles/viewport"
-	tea "github.com/charmbracelet/bubbletea"
-	"github.com/charmbracelet/lipgloss"
-)
-
-var (
-	titleStyle = func() lipgloss.Style {
-		b := lipgloss.RoundedBorder()
-		b.Right = "├"
-		return lipgloss.NewStyle().BorderStyle(b).Padding(0, 1)
-	}()
-
-	infoStyle = func() lipgloss.Style {
-		b := lipgloss.RoundedBorder()
-		b.Left = "┤"
-		return titleStyle.BorderStyle(b)
-	}()
-)
-
-type model struct {
-	content  string
-	title    string
-	ready    bool
-	viewport viewport.Model
-}
-
-func (m model) Init() tea.Cmd {
-	return nil
-}
-
-func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
-	var (
-		cmd  tea.Cmd
-		cmds []tea.Cmd
-	)
-
-	switch msg := msg.(type) {
-	case tea.KeyMsg:
-		if k := msg.String(); k == "ctrl+c" || k == "q" || k == "esc" {
-			return m, tea.Quit
-		}
-
-	case tea.WindowSizeMsg:
-		headerHeight := lipgloss.Height(m.headerView())
-		footerHeight := lipgloss.Height(m.footerView())
-		verticalMarginHeight := headerHeight + footerHeight
-
-		if !m.ready {
-			// Since this program is using the full size of the viewport we
-			// need to wait until we've received the window dimensions before
-			// we can initialize the viewport. The initial dimensions come in
-			// quickly, though asynchronously, which is why we wait for them
-			// here.
-			m.viewport = viewport.New(msg.Width, msg.Height-verticalMarginHeight)
-			m.viewport.YPosition = headerHeight
-			m.viewport.SetContent(m.content)
-			m.ready = true
-		} else {
-			m.viewport.Width = msg.Width
-			m.viewport.Height = msg.Height - verticalMarginHeight
-		}
-	}
-
-	// Handle keyboard and mouse events in the viewport
-	m.viewport, cmd = m.viewport.Update(msg)
-	cmds = append(cmds, cmd)
-
-	return m, tea.Batch(cmds...)
-}
-
-func (m model) View() string {
-	if !m.ready {
-		return "\n  Initializing..."
-	}
-	return fmt.Sprintf("%s\n%s\n%s", m.headerView(), m.viewport.View(), m.footerView())
-}
-
-func (m model) headerView() string {
-	// title := titleStyle.Render("RPN Help Overview")
-	title := titleStyle.Render(m.title)
-	line := strings.Repeat("─", max(0, m.viewport.Width-lipgloss.Width(title)))
-	return lipgloss.JoinHorizontal(lipgloss.Center, title, line)
-}
-
-func (m model) footerView() string {
-	info := infoStyle.Render(fmt.Sprintf("%3.f%%", m.viewport.ScrollPercent()*100))
-	line := strings.Repeat("─", max(0, m.viewport.Width-lipgloss.Width(info)))
-	return lipgloss.JoinHorizontal(lipgloss.Center, line, info)
-}
-
-func max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
-
-func Pager(title, message string) {
-	p := tea.NewProgram(
-		model{content: message, title: title},
-		tea.WithAltScreen(),       // use the full size of the terminal in its "alternate screen buffer"
-		tea.WithMouseCellMotion(), // turn on mouse support so we can track the mouse wheel
-	)
-
-	if _, err := p.Run(); err != nil {
-		fmt.Println("could not run pager:", err)
-		os.Exit(1)
-	}
-}
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -1,195 +0,0 @@
-/*
-Copyright © 2023-2024 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 cmd
-
-import (
-	"fmt"
-	"log"
-	"os"
-	"strings"
-
-	"github.com/chzyer/readline"
-	flag "github.com/spf13/pflag"
-	lua "github.com/yuin/gopher-lua"
-)
-
-const VERSION string = "2.1.7"
-
-const Usage string = `This is rpn, a reverse polish notation calculator cli.
-
-Usage: rpn [-bdvh] [<operator>]
-
-Options:
-  -b, --batchmode       enable batch mode
-  -d, --debug           enable debug mode
-  -s, --stack           show last 5 items of the stack (off by default)
-  -i  --intermediate    print intermediate results
-  -m, --manual          show manual
-  -c, --config <file>   load <file> containing LUA code
-  -p, --precision <int> floating point number precision (default 2)
-  -v, --version         show version
-  -h, --help            show help
-
-When <operator>  is given, batch  mode ist automatically  enabled. Use
-this only when working with stdin. E.g.: echo "2 3 4 5" | rpn +
-
-Copyright (c) 2023-2025 T.v.Dein`
-
-func Main() int {
-	calc := NewCalc()
-
-	showversion := false
-	showhelp := false
-	showmanual := false
-	enabledebug := false
-	configfile := ""
-
-	flag.BoolVarP(&calc.batch, "batchmode", "b", false, "batch mode")
-	flag.BoolVarP(&calc.showstack, "show-stack", "s", false, "show stack")
-	flag.BoolVarP(&calc.intermediate, "showin-termediate", "i", false,
-		"show intermediate results")
-	flag.BoolVarP(&enabledebug, "debug", "d", false, "debug mode")
-	flag.BoolVarP(&showversion, "version", "v", false, "show version")
-	flag.BoolVarP(&showhelp, "help", "h", false, "show usage")
-	flag.BoolVarP(&showmanual, "manual", "m", false, "show manual")
-	flag.StringVarP(&configfile, "config", "c",
-		os.Getenv("HOME")+"/.rpn.lua", "config file (lua format)")
-	flag.IntVarP(&calc.precision, "precision", "p", Precision, "floating point precision")
-
-	flag.Parse()
-
-	if showversion {
-		fmt.Printf("This is rpn version %s\n", VERSION)
-
-		return 0
-	}
-
-	if showhelp {
-		fmt.Println(Usage)
-
-		return 0
-	}
-
-	if enabledebug {
-		calc.ToggleDebug()
-	}
-
-	if showmanual {
-		man()
-
-		return 0
-	}
-
-	// the lua state object is global, instantiate it early
-	LuaInterpreter = lua.NewState(lua.Options{SkipOpenLibs: true})
-	defer LuaInterpreter.Close()
-
-	// our config file is interpreted  as lua code, only functions can
-	// be defined, init() will be called by InitLua().
-	if _, err := os.Stat(configfile); err == nil {
-		luarunner := NewInterpreter(configfile, enabledebug)
-		luarunner.InitLua()
-		calc.SetInt(luarunner)
-
-		if calc.debug {
-			fmt.Println("loaded config")
-		}
-	} else if calc.debug {
-		fmt.Println(err)
-	}
-
-	if len(flag.Args()) > 1 {
-		// commandline calc operation, no readline etc needed
-		// called like rpn 2 2 +
-		calc.stdin = true
-		if err := calc.Eval(strings.Join(flag.Args(), " ")); err != nil {
-			fmt.Println(err)
-
-			return 1
-		}
-
-		return 0
-	}
-
-	// interactive mode, need readline
-	reader, err := readline.NewEx(&readline.Config{
-		Prompt:            calc.Prompt(),
-		HistoryFile:       os.Getenv("HOME") + "/.rpn-history",
-		HistoryLimit:      500,
-		AutoComplete:      calc.completer,
-		InterruptPrompt:   "^C",
-		EOFPrompt:         "exit",
-		HistorySearchFold: true,
-	})
-
-	if err != nil {
-		panic(err)
-	}
-	defer func() {
-		if err := reader.Close(); err != nil {
-			log.Fatal(err)
-		}
-	}()
-
-	reader.CaptureExitSignal()
-
-	if inputIsStdin() {
-		// commands are  coming on stdin, however we  will still enter
-		// the same loop since readline just reads fine from stdin
-		calc.ToggleStdin()
-	}
-
-	for {
-		// primary program repl
-		line, err := reader.Readline()
-		if err != nil {
-			break
-		}
-
-		err = calc.Eval(line)
-		if err != nil {
-			fmt.Println(err)
-		}
-
-		reader.SetPrompt(calc.Prompt())
-	}
-
-	if len(flag.Args()) > 0 {
-		// called like this:
-		// echo 1 2 3 4 | rpn +
-		// batch mode enabled automatically
-		calc.batch = true
-		if err = calc.Eval(flag.Args()[0]); err != nil {
-			fmt.Println(err)
-
-			return 1
-		}
-	}
-
-	return 0
-}
-
-func inputIsStdin() bool {
-	stat, _ := os.Stdin.Stat()
-
-	return (stat.Mode() & os.ModeCharDevice) == 0
-}
-
-func man() {
-	Pager("rpn manual page", manpage)
-}
--- a/cmd/command.go
+++ b/cmd/command.go
@@ -15,12 +15,11 @@ 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 cmd
+package main

 import (
 	"bufio"
 	"fmt"
-	"log"
 	"os"
 	"os/exec"
 	"strconv"
@@ -215,10 +214,6 @@ func (c *Calc) SetCommands() {
 	c.SettingsCommands["b"] = c.SettingsCommands["batch"]
 	c.SettingsCommands["s"] = c.SettingsCommands["showstack"]

-	c.SettingsCommands["togglebatch"] = c.SettingsCommands["batch"]
-	c.SettingsCommands["toggledebug"] = c.SettingsCommands["debug"]
-	c.SettingsCommands["toggleshowstack"] = c.SettingsCommands["showstack"]
-
 	c.ShowCommands["h"] = c.ShowCommands["history"]
 	c.ShowCommands["p"] = c.ShowCommands["dump"]
 	c.ShowCommands["v"] = c.ShowCommands["vars"]
@@ -264,11 +259,7 @@ func CommandEdit(calc *Calc) {
 		return
 	}

-	defer func() {
-		if err := os.Remove(tmp.Name()); err != nil {
-			log.Fatal(err)
-		}
-	}()
+	defer os.Remove(tmp.Name())

 	comment := `# add or remove numbers as you wish.
 # each number must be on its own line.
@@ -291,9 +282,7 @@ func CommandEdit(calc *Calc) {
 		}
 	}

-	if err := tmp.Close(); err != nil {
-		log.Fatal(err)
-	}
+	tmp.Close()

 	// determine which editor to use
 	editor := "vi"
@@ -328,11 +317,7 @@ func CommandEdit(calc *Calc) {

 		return
 	}
-	defer func() {
-		if err := modified.Close(); err != nil {
-			log.Fatal(err)
-		}
-	}()
+	defer modified.Close()

 	// reset the stack
 	calc.stack.Clear()
--- a/cmd/funcs.go
+++ b/cmd/funcs.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"errors"
@@ -437,30 +437,6 @@ func DefineFunctions() Funcalls {
 			},
 			1),

-		"bytes-to-kilobytes": NewFuncall(
-			func(arg Numbers) Result {
-				return NewResult(arg[0]/1024, nil)
-			},
-			1),
-
-		"bytes-to-megabytes": NewFuncall(
-			func(arg Numbers) Result {
-				return NewResult(arg[0]/1024/1024, nil)
-			},
-			1),
-
-		"bytes-to-gigabytes": NewFuncall(
-			func(arg Numbers) Result {
-				return NewResult(arg[0]/1024/1024/1024, nil)
-			},
-			1),
-
-		"bytes-to-terabytes": NewFuncall(
-			func(arg Numbers) Result {
-				return NewResult(arg[0]/1024/1024/1024/1024, nil)
-			},
-			1),
-
 		"or": NewFuncall(
 			func(arg Numbers) Result {
 				return NewResult(float64(int(arg[0])|int(arg[1])), nil)
--- a/go.mod
+++ b/go.mod
@@ -1,34 +1,12 @@
 module rpn

-go 1.24.5
+go 1.20

 require (
-	github.com/charmbracelet/bubbles v0.21.0
-	github.com/charmbracelet/bubbletea v1.3.10
-	github.com/charmbracelet/lipgloss v1.1.0
-	github.com/chzyer/readline v1.5.1
-	github.com/rogpeppe/go-internal v1.14.1
-	github.com/spf13/pflag v1.0.10
-	github.com/yuin/gopher-lua v1.1.1
-)
-
-require (
-	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
-	github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc // indirect
-	github.com/charmbracelet/x/ansi v0.10.1 // indirect
-	github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd // indirect
-	github.com/charmbracelet/x/term v0.2.1 // indirect
-	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
-	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-localereader v0.0.1 // indirect
-	github.com/mattn/go-runewidth v0.0.16 // indirect
-	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
-	github.com/muesli/cancelreader v0.2.2 // indirect
-	github.com/muesli/termenv v0.16.0 // indirect
-	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/sys v0.36.0 // indirect
-	golang.org/x/text v0.3.8 // indirect
-	golang.org/x/tools v0.26.0 // indirect
+	github.com/chzyer/readline v1.5.1 // indirect
+	github.com/rogpeppe/go-internal v1.11.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/yuin/gopher-lua v1.1.0 // indirect
+	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
+	golang.org/x/tools v0.1.12 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,60 +1,16 @@
-github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
-github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
-github.com/charmbracelet/bubbles v0.21.0 h1:9TdC97SdRVg/1aaXNVWfFH3nnLAwOXr8Fn6u6mfQdFs=
-github.com/charmbracelet/bubbles v0.21.0/go.mod h1:HF+v6QUR4HkEpz62dx7ym2xc71/KBHg+zKwJtMw+qtg=
-github.com/charmbracelet/bubbletea v1.3.10 h1:otUDHWMMzQSB0Pkc87rm691KZ3SWa4KUlvF9nRvCICw=
-github.com/charmbracelet/bubbletea v1.3.10/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc h1:4pZI35227imm7yK2bGPcfpFEmuY1gc2YSTShr4iJBfs=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc/go.mod h1:X4/0JoqgTIPSFcRA/P6INZzIuyqdFY5rm8tb41s9okk=
-github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
-github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
-github.com/charmbracelet/x/ansi v0.10.1 h1:rL3Koar5XvX0pHGfovN03f5cxLbCF2YvLeyz7D2jVDQ=
-github.com/charmbracelet/x/ansi v0.10.1/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd h1:vy0GVL4jeHEwG5YOXDmi86oYw2yuYUGqz6a8sLwg0X8=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
-github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
-github.com/charmbracelet/x/term v0.2.1/go.mod h1:oQ4enTYFV7QN4m0i9mzHrViD7TQKvNEEkHUMCmsxdUg=
-github.com/chzyer/logex v1.2.1 h1:XHDu3E6q+gdHgsdTPH6ImJMIp436vR6MPtH8gP05QzM=
 github.com/chzyer/logex v1.2.1/go.mod h1:JLbx6lG2kDbNRFnfkgvh4eRJRPX1QCoOIWomwysCBrQ=
 github.com/chzyer/readline v1.5.1 h1:upd/6fQk4src78LMRzh5vItIt361/o4uq553V8B5sGI=
 github.com/chzyer/readline v1.5.1/go.mod h1:Eh+b79XXUwfKfcPLepksvw2tcLE/Ct21YObkaSkeBlk=
-github.com/chzyer/test v1.0.0 h1:p3BQDXSxOhOG0P9z6/hGnII4LGiEPOYBhs8asl/fC04=
 github.com/chzyer/test v1.0.0/go.mod h1:2JlltgoNkt4TW/z9V/IzDdFaMTM2JPIi26O1pF38GC8=
-github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
-github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
-github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
-github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
-github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
-github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
-github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
-github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
-github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
-github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
-github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
-github.com/muesli/termenv v0.16.0 h1:S5AlUN9dENB57rsbnkPyfdGuWIlkmzJjbFf0Tf5FWUc=
-github.com/muesli/termenv v0.16.0/go.mod h1:ZRfOIKPFDYQoDFF4Olj7/QJbW60Ol/kL1pU3VfY/Cnk=
-github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
-github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
-github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
-github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
-github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
-github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
-github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-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=
-github.com/yuin/gopher-lua v1.1.1 h1:kYKnWBjvbNP4XLT3+bPEwAXJx262OhaHDWDVOPjL46M=
-github.com/yuin/gopher-lua v1.1.1/go.mod h1:GBR0iDaNXjAgGg9zfCvksxSRnQx76gclCIb7kdAd1Pw=
-golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
-golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
-golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
+github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/yuin/gopher-lua v1.1.0 h1:BojcDhfyDWgU2f2TOzYK/g5p2gxMrku8oupLDqlnSqE=
+github.com/yuin/gopher-lua v1.1.0/go.mod h1:GBR0iDaNXjAgGg9zfCvksxSRnQx76gclCIb7kdAd1Pw=
+golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 h1:y/woIyUBFbpQGKS0u1aHF/40WUDnek3fPOyD08H5Vng=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
-golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
-golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
-golang.org/x/tools v0.26.0 h1:v/60pFQmzmT9ExmjDv2gGIfi3OqfKoEP6I5+umXlbnQ=
-golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f h1:v4INt8xihDGvnrfjMDVXGxw9wrfxYyCjk0KbXjhR55s=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/tools v0.1.12 h1:VveCTK38A2rkS8ZqFY25HIDFscX5X9OoEhJd3quQmXU=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
--- a/cmd/interpreter.go
+++ b/cmd/interpreter.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"errors"
@@ -116,7 +116,9 @@ func (i *Interpreter) CallLuaFunc(funcname string, items []float64) (float64, er
 		funcname, LuaFuncs[funcname].numargs))

 	switch LuaFuncs[funcname].numargs {
-	case 0, 1:
+	case 0:
+		fallthrough
+	case 1:
 		// 1 arg variant
 		if err := LuaInterpreter.CallByParam(lua.P{
 			Fn:      LuaInterpreter.GetGlobal(funcname),
--- a/main.go
+++ b/main.go
@@ -18,10 +18,193 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package main

 import (
+	"bytes"
+	"fmt"
+	"log"
 	"os"
-	"rpn/cmd"
+	"os/exec"
+	"strings"
+
+	"github.com/chzyer/readline"
+	flag "github.com/spf13/pflag"
+	lua "github.com/yuin/gopher-lua"
 )

+const VERSION string = "2.1.0"
+
+const Usage string = `This is rpn, a reverse polish notation calculator cli.
+
+Usage: rpn [-bdvh] [<operator>]
+
+Options:
+  -b, --batchmode       enable batch mode
+  -d, --debug           enable debug mode
+  -s, --stack           show last 5 items of the stack (off by default)
+  -i  --intermediate    print intermediate results
+  -m, --manual          show manual
+  -c, --config <file>   load <file> containing LUA code
+  -p, --precision <int> floating point number precision (default 2)
+  -v, --version         show version
+  -h, --help            show help
+
+When <operator>  is given, batch  mode ist automatically  enabled. Use
+this only when working with stdin. E.g.: echo "2 3 4 5" | rpn +
+
+Copyright (c) 2023-2024 T.v.Dein`
+
 func main() {
-	os.Exit(cmd.Main())
+	os.Exit(Main())
+}
+
+func Main() int {
+	calc := NewCalc()
+
+	showversion := false
+	showhelp := false
+	showmanual := false
+	enabledebug := false
+	configfile := ""
+
+	flag.BoolVarP(&calc.batch, "batchmode", "b", false, "batch mode")
+	flag.BoolVarP(&calc.showstack, "show-stack", "s", false, "show stack")
+	flag.BoolVarP(&calc.intermediate, "showin-termediate", "i", false,
+		"show intermediate results")
+	flag.BoolVarP(&enabledebug, "debug", "d", false, "debug mode")
+	flag.BoolVarP(&showversion, "version", "v", false, "show version")
+	flag.BoolVarP(&showhelp, "help", "h", false, "show usage")
+	flag.BoolVarP(&showmanual, "manual", "m", false, "show manual")
+	flag.StringVarP(&configfile, "config", "c",
+		os.Getenv("HOME")+"/.rpn.lua", "config file (lua format)")
+	flag.IntVarP(&calc.precision, "precision", "p", Precision, "floating point precision")
+
+	flag.Parse()
+
+	if showversion {
+		fmt.Printf("This is rpn version %s\n", VERSION)
+
+		return 0
+	}
+
+	if showhelp {
+		fmt.Println(Usage)
+
+		return 0
+	}
+
+	if enabledebug {
+		calc.ToggleDebug()
+	}
+
+	if showmanual {
+		man()
+
+		return 0
+	}
+
+	// the lua state object is global, instantiate it early
+	LuaInterpreter = lua.NewState(lua.Options{SkipOpenLibs: true})
+	defer LuaInterpreter.Close()
+
+	// our config file is interpreted  as lua code, only functions can
+	// be defined, init() will be called by InitLua().
+	if _, err := os.Stat(configfile); err == nil {
+		luarunner := NewInterpreter(configfile, enabledebug)
+		luarunner.InitLua()
+		calc.SetInt(luarunner)
+
+		if calc.debug {
+			fmt.Println("loaded config")
+		}
+	} else if calc.debug {
+		fmt.Println(err)
+	}
+
+	if len(flag.Args()) > 1 {
+		// commandline calc operation, no readline etc needed
+		// called like rpn 2 2 +
+		calc.stdin = true
+		if err := calc.Eval(strings.Join(flag.Args(), " ")); err != nil {
+			fmt.Println(err)
+
+			return 1
+		}
+
+		return 0
+	}
+
+	// interactive mode, need readline
+	reader, err := readline.NewEx(&readline.Config{
+		Prompt:            calc.Prompt(),
+		HistoryFile:       os.Getenv("HOME") + "/.rpn-history",
+		HistoryLimit:      500,
+		AutoComplete:      calc.completer,
+		InterruptPrompt:   "^C",
+		EOFPrompt:         "exit",
+		HistorySearchFold: true,
+	})
+
+	if err != nil {
+		panic(err)
+	}
+	defer reader.Close()
+	reader.CaptureExitSignal()
+
+	if inputIsStdin() {
+		// commands are  coming on stdin, however we  will still enter
+		// the same loop since readline just reads fine from stdin
+		calc.ToggleStdin()
+	}
+
+	for {
+		// primary program repl
+		line, err := reader.Readline()
+		if err != nil {
+			break
+		}
+
+		err = calc.Eval(line)
+		if err != nil {
+			fmt.Println(err)
+		}
+
+		reader.SetPrompt(calc.Prompt())
+	}
+
+	if len(flag.Args()) > 0 {
+		// called like this:
+		// echo 1 2 3 4 | rpn +
+		// batch mode enabled automatically
+		calc.batch = true
+		if err = calc.Eval(flag.Args()[0]); err != nil {
+			fmt.Println(err)
+
+			return 1
+		}
+	}
+
+	return 0
+}
+
+func inputIsStdin() bool {
+	stat, _ := os.Stdin.Stat()
+
+	return (stat.Mode() & os.ModeCharDevice) == 0
+}
+
+func man() {
+	var buf bytes.Buffer
+
+	man := exec.Command("less", "-")
+
+	buf.WriteString(manpage)
+
+	man.Stdout = os.Stdout
+	man.Stdin = &buf
+	man.Stderr = os.Stderr
+
+	err := man.Run()
+
+	if err != nil {
+		log.Fatal(err)
+	}
 }
--- a/main_test.go
+++ b/main_test.go
@@ -1,15 +1,16 @@
 package main

 import (
+	"os"
 	"testing"

 	"github.com/rogpeppe/go-internal/testscript"
 )

 func TestMain(m *testing.M) {
-	testscript.Main(m, map[string]func(){
-		"rpn": main,
-	})
+	os.Exit(testscript.RunMain(m, map[string]func() int{
+		"testrpn": Main,
+	}))
 }

 func TestRpn(t *testing.T) {
--- a/mkrel.sh
+++ b/mkrel.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# 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/>.
+
+
+# get list with: go tool dist list
+DIST="darwin/amd64
+freebsd/amd64
+linux/amd64
+netbsd/amd64
+openbsd/amd64
+windows/amd64"
+
+tool="$1"
+version="$2"
+
+if test -z "$version"; then
+  echo "Usage: $0 <tool name> <release version>"
+  exit 1
+fi
+
+rm -rf releases
+mkdir -p releases
+
+
+for D in $DIST; do
+    os=${D/\/*/}
+    arch=${D/*\//}
+    binfile="releases/${tool}-${os}-${arch}-${version}"
+    tardir="${tool}-${os}-${arch}-${version}"
+    tarfile="releases/${tool}-${os}-${arch}-${version}.tar.gz"
+    set -x
+    GOOS=${os} GOARCH=${arch} go build -tags osusergo,netgo -ldflags "-extldflags=-static" -o ${binfile}
+    mkdir -p ${tardir}
+    cp ${binfile} README.md LICENSE ${tardir}/
+    echo 'tool = rpn
+PREFIX = /usr/local
+UID    = root
+GID    = 0
+
+install:
+	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
+	install -d -o $(UID) -g $(GID) $(PREFIX)/man/man1
+	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
+	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/' > ${tardir}/Makefile
+    tar cpzf ${tarfile} ${tardir}
+    sha256sum ${binfile} | cut -d' ' -f1 > ${binfile}.sha256
+    sha256sum ${tarfile} | cut -d' ' -f1 > ${tarfile}.sha256
+    rm -rf ${tardir}
+    set +x
+done
+
--- a/cmd/rpn.go
+++ b/cmd/rpn.go
@@ -1,4 +1,4 @@
-package cmd
+package main

 var manpage = `
 NAME
@@ -108,8 +108,7 @@ DESCRIPTION
    is enabled automatically, see last example.

    You can enter integers, floating point numbers (positive or negative) or
-    hex numbers (prefixed with 0x). Time values in hh::mm format are
-    possible as well.
+    hex numbers (prefixed with 0x).

  STACK MANIPULATION
    There are lots of stack manipulation commands provided. The most
@@ -166,10 +165,14 @@ DESCRIPTION

    Conversion functions:

-        cm-to-inch          yards-to-meters         bytes-to-kilobytes
-        inch-to-cm          meters-to-yards         bytes-to-megabytes
-        gallons-to-liters   miles-to-kilometers     bytes-to-gigabytes
-        liters-to-gallons   kilometers-to-miles     bytes-to-terabytes
+        cm-to-inch
+        inch-to-cm
+        gallons-to-liters
+        liters-to-gallons
+        yards-to-meters
+        meters-to-yards
+        miles-to-kilometers
+        kilometers-to-miles

    Configuration Commands:

@@ -330,7 +333,7 @@ GETTING HELP
 BUGS
    In order to report a bug, unexpected behavior, feature requests or to
    submit a patch, please open an issue on github:
-    <https://codeberg.org/scip/rpnc/issues>.
+    <https://github.com/TLINDEN/rpnc/issues>.

 LICENSE
    This software is licensed under the GNU GENERAL PUBLIC LICENSE version
--- a/rpn.pod
+++ b/rpn.pod
@@ -112,8 +112,7 @@ If the first parameter to rpn is a math operator or function, batch
 mode is enabled automatically, see last example.

 You can enter integers, floating  point numbers (positive or negative)
-or hex  numbers (prefixed with 0x).  Time values in hh::mm  format are
-possible as well.
+or hex numbers (prefixed with 0x).

 =head2 STACK MANIPULATION

@@ -173,10 +172,14 @@ Math functions:

 Conversion functions:

-    cm-to-inch          yards-to-meters         bytes-to-kilobytes
-    inch-to-cm          meters-to-yards         bytes-to-megabytes
-    gallons-to-liters   miles-to-kilometers     bytes-to-gigabytes
-    liters-to-gallons   kilometers-to-miles     bytes-to-terabytes
+    cm-to-inch
+    inch-to-cm
+    gallons-to-liters
+    liters-to-gallons
+    yards-to-meters
+    meters-to-yards
+    miles-to-kilometers
+    kilometers-to-miles

 Configuration Commands:

@@ -367,7 +370,7 @@ tarball, there will also be a manual page you can read using C<man rpn>.

 In order to report a bug, unexpected behavior, feature requests
 or to submit a patch, please open an issue on github:
-L<https://codeberg.org/scip/rpnc/issues>.
+L<https://github.com/TLINDEN/rpnc/issues>.

 =head1 LICENSE

--- a/rpnc.mp4
+++ b/rpnc.mp4
--- a/cmd/stack.go
+++ b/cmd/stack.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"container/list"
--- a/cmd/stack_test.go
+++ b/cmd/stack_test.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"testing"
--- a/t/cmdline-command.txtar
+++ b/t/cmdline-command.txtar
@@ -1,2 +1,2 @@
-exec rpn 1 2 dump
+exec testrpn 1 2 dump
 stdout 'Stack revision 2 .0x'
--- a/t/cmdline-invalidcommand.txtar
+++ b/t/cmdline-invalidcommand.txtar
@@ -1,2 +1,2 @@
-! exec rpn 1 2 dumb
+! exec testrpn 1 2 dumb
 stdout 'unknown command or operator'
--- a/t/cmdline-precision.txtar
+++ b/t/cmdline-precision.txtar
@@ -1,2 +1,2 @@
-exec rpn -p 4 2 3 /
+exec testrpn -p 4 2 3 /
 stdout '0.6667\n'
--- a/t/cmdline-short-stack.txtar
+++ b/t/cmdline-short-stack.txtar
@@ -1,2 +1,2 @@
-! exec rpn 4 +
+! exec testrpn 4 +
 stdout 'stack doesn''t provide enough arguments'
--- a/t/cmdlinecalc-debug.txtar
+++ b/t/cmdlinecalc-debug.txtar
@@ -1,2 +1,2 @@
-exec rpn -d 44 55 *
+exec testrpn -d 44 55 *
 stdout 'push to stack: 2420.00\n'
--- a/t/cmdlinecalc-divzero.txtar
+++ b/t/cmdlinecalc-divzero.txtar
@@ -1,2 +1,2 @@
-! exec rpn 100 50 50 - /
+! exec testrpn 100 50 50 - /
 stdout 'division by null'
--- a/t/cmdlinecalc-lua.txtar
+++ b/t/cmdlinecalc-lua.txtar
@@ -1,4 +1,4 @@
-exec rpn -d -c test.lua 3 5 lower
+exec testrpn -d -c test.lua 3 5 lower
 stdout '3\n'

 -- test.lua --
--- a/t/cmdlinecalc-time.txtar
+++ b/t/cmdlinecalc-time.txtar
@@ -1,2 +0,0 @@
-exec rpn 09:55 4:15 -
-stdout '5.67\n'
--- a/t/cmdlinecalc.txtar
+++ b/t/cmdlinecalc.txtar
@@ -1,2 +1,2 @@
-exec rpn 44 55 *
+exec testrpn 44 55 *
 stdout '2420\n'
--- a/t/getman.txtar
+++ b/t/getman.txtar
@@ -0,0 +1,2 @@
+exec testrpn -m
+stdout 'This software is licensed under the GNU GENERAL PUBLIC LICENSE'
--- a/t/getusage.txtar
+++ b/t/getusage.txtar
@@ -1,2 +1,2 @@
-exec rpn -h
+exec testrpn -h
 stdout 'This is rpn'
--- a/t/getversion.txtar
+++ b/t/getversion.txtar
@@ -1,2 +1,2 @@
-exec rpn -v
+exec testrpn -v
 stdout 'This is rpn version'
--- a/t/stdin-batch-cmd.txtar
+++ b/t/stdin-batch-cmd.txtar
@@ -1,4 +1,4 @@
 exec echo 1 2 3 4 5 batch median
 stdin stdout
-exec rpn
+exec testrpn
 [unix] stdout '3\n'
--- a/t/stdin-batch.txtar
+++ b/t/stdin-batch.txtar
@@ -1,4 +1,4 @@
 exec echo 1 2 3 4 5
 stdin stdout
-[unix] exec rpn median
+[unix] exec testrpn median
 [unix] stdout '3\n'
--- a/t/stdin-calc.txtar
+++ b/t/stdin-calc.txtar
@@ -1,4 +1,4 @@
 exec echo 10 10 +
 stdin stdout
-exec rpn
+exec testrpn
 [unix] stdout '20\n'
--- a/t/stdin-help.txtar
+++ b/t/stdin-help.txtar
@@ -0,0 +1,6 @@
+stdin input.txt
+exec testrpn
+[unix] stdout 'Available configuration commands'
+
+-- input.txt --
+?
--- a/t/stdin-use-vars.txtar
+++ b/t/stdin-use-vars.txtar
@@ -1,5 +1,5 @@
 stdin input.txt
-exec rpn
+exec testrpn
 [unix] stdout '28\n'

 -- input.txt --
--- a/t/stdint-explicit-batch.txtar
+++ b/t/stdint-explicit-batch.txtar
@@ -1,4 +1,4 @@
 exec echo 1 2 3 4 5 median
 stdin stdout
-exec rpn -b
+exec testrpn -b
 [unix] stdout '3\n'
--- a/cmd/util.go
+++ b/cmd/util.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"fmt"
--- a/cmd/util_test.go
+++ b/cmd/util_test.go
@@ -15,7 +15,7 @@ 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 cmd
+package main

 import (
 	"testing"