various changes:

- added copying in every file
- disasembled rootCmd into separate wrapper func
- print usage if no file and no stdin

Makefile

@@ -1,18 +1,46 @@
+
+# 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
+# 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/>.
+
+
 #
 # no need to modify anything below
 tool    = tablizer
 version = $(shell egrep "^var version = " cmd/root.go | cut -d'=' -f2 | cut -d'"' -f 2)
 archs   = android darwin freebsd linux netbsd openbsd windows
+PREFIX = /usr/local
+UID    = root
+GID    = 0
 
-all:
-	@echo "Type 'make install' to install $(tool)"
+all: buildlocal man
 
-install:
-	install -m 755 -d $(bindir)
-	install -m 755 -d $(linkdir)
-	install -m 755 $(tool) $(bindir)/$(tool)-$(version)
-	ln -sf $(bindir)/$(tool)-$(version) $(linkdir)/$(tool)
+man:
+	pod2man -c "User Commands" -r 1 -s 1 $(tool).pod > $(tool).1
+
+buildlocal:
+	go build
 
 release:
 	mkdir -p releases
 	$(foreach arch,$(archs), GOOS=$(arch) GOARCH=amd64 go build -x -o releases/$(tool)-$(arch)-amd64-$(version); sha256sum releases/$(tool)-$(arch)-amd64-$(version) | cut -d' ' -f1 > releases/$(tool)-$(arch)-amd64-$(version).sha256sum;)
+
+install: buildlocal
+	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/
+
+clean:
+	rm -f $(tool) $(tool).1

README.md

@@ -68,12 +68,45 @@ repldepl-7bcd8d5b64-q2bf4    1/1      Running    1 (69m ago)    5h26m
 
 ## Installation
 
-Download the latest release file for your architecture and put it into
-a directory within your `$PATH`.
+There are multiple ways to install **tablizer**:
+
+- Go to the [latest release page](https://github.com/muesli/mango/releases/latest),
+  locate the binary for your operating system and platform.
+  
+  Download it and put it into some directory within your `$PATH` variable.
+  
+- The release page also contains a tarball for every supported platform. Unpack it
+  to some temporary directory, extract it and execute the following command inside:
+  ```
+  sudo make install
+  ```
+  
+- You can also install from source. Issue the following commands in your shell:
+  ```
+  git clone https://github.com/TLINDEN/tablizer.git
+  cd tablizer
+  make
+  sudo make install
+  ```
+
+If you  do not find a  binary release for your  platform, please don't
+hesitate to ask me about it, I'll add it.
+
+## Documentation
+
+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://github.com/TLINDEN/tablizer/blob/main/tablizer.pod
+
+Or if you cloned  the repository you can read it  this way (perl needs
+to be installed though): `perldoc tablizer.pod`.
+
 
 ## Getting help
 
-Although I'm happy to hear from udpxd users in private email,
+Although I'm happy to hear from tablizer users in private email,
 that's the best way for me to forget to do something.
 
 In order to report a bug, unexpected behavior, feature requests

TODO

@@ -2,3 +2,5 @@ Add a mode like FreeBSD stat(1):
 
 stat -s dead.letter 
 st_dev=170671546954750497 st_ino=159667 st_mode=0100644 st_nlink=1 st_uid=1001 st_gid=1001 st_rdev=18446744073709551615 st_size=573 st_atime=1661994007 st_mtime=1661961878 st_ctime=1661961878 st_birthtime=1658394900 st_blksize=4096 st_blocks=3 st_flags=2048
+
+Add reasoning about non-csv output of kubectl

cmd/parser.go

@@ -1,3 +1,20 @@
+/*
+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
+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 (

cmd/printer.go

@@ -1,3 +1,20 @@
+/*
+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
+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 (

cmd/processinput.go

@@ -0,0 +1,79 @@
+/*
+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
+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 (
+	"errors"
+	"github.com/alecthomas/repr"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func process(args []string) error {
+	var pattern string
+	havefiles := false
+
+	if len(Columns) > 0 {
+		for _, use := range strings.Split(Columns, ",") {
+			usenum, err := strconv.Atoi(use)
+			if err != nil {
+				die(err)
+			}
+			UseColumns = append(UseColumns, usenum)
+		}
+	}
+
+	if len(args) > 0 {
+		if _, err := os.Stat(args[0]); err != nil {
+			pattern = args[0]
+			args = args[1:]
+		}
+
+		if len(args) > 0 {
+			for _, file := range args {
+				fd, err := os.OpenFile(file, os.O_RDONLY, 0755)
+				if err != nil {
+					die(err)
+				}
+
+				data := parseFile(fd, pattern)
+				if Debug {
+					repr.Print(data)
+				}
+				printTable(data)
+			}
+			havefiles = true
+		}
+	}
+
+	if !havefiles {
+		stat, _ := os.Stdin.Stat()
+		if (stat.Mode() & os.ModeCharDevice) == 0 {
+			data := parseFile(os.Stdin, pattern)
+			if Debug {
+				repr.Print(data)
+			}
+			printTable(data)
+		} else {
+			return errors.New("No file specified and nothing to read on stdin!")
+		}
+	}
+
+	return nil
+}

cmd/root.go

@@ -18,68 +18,23 @@ package cmd
 
 import (
 	"fmt"
-	"github.com/alecthomas/repr"
 	"github.com/spf13/cobra"
 	"os"
-	"strconv"
-	"strings"
 )
 
-var version = "v1.0.0"
+var version = "v1.0.1"
 
 var rootCmd = &cobra.Command{
 	Use:   "tablizer [regex] [file, ...]",
 	Short: "[Re-]tabularize tabular data",
 	Long:  `Manipulate tabular output of other programs`,
-	Run: func(cmd *cobra.Command, args []string) {
+	RunE: func(cmd *cobra.Command, args []string) error {
 		if Version {
 			fmt.Printf("This is tablizer version %s\n", version)
-			return
+			return nil
 		}
 
-		var pattern string
-		havefiles := false
-
-		if len(Columns) > 0 {
-			for _, use := range strings.Split(Columns, ",") {
-				usenum, err := strconv.Atoi(use)
-				if err != nil {
-					die(err)
-				}
-				UseColumns = append(UseColumns, usenum)
-			}
-		}
-
-		if len(args) > 0 {
-			if _, err := os.Stat(args[0]); err != nil {
-				pattern = args[0]
-				args = args[1:]
-			}
-
-			if len(args) > 0 {
-				for _, file := range args {
-					fd, err := os.OpenFile(file, os.O_RDONLY, 0755)
-					if err != nil {
-						die(err)
-					}
-
-					data := parseFile(fd, pattern)
-					if Debug {
-						repr.Print(data)
-					}
-					printTable(data)
-				}
-				havefiles = true
-			}
-		}
-
-		if !havefiles {
-			data := parseFile(os.Stdin, pattern)
-			if Debug {
-				repr.Print(data)
-			}
-			printTable(data)
-		}
+		return process(args)
 	},
 }
 

main.go

@@ -1,3 +1,20 @@
+/*
+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
+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 main
 
 import (

mkrel.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# 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
+# 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"
+
+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 -o ${binfile}
+    mkdir -p ${tardir}
+    cp ${binfile} README.md LICENSE ${tardir}/
+    echo 'tool = tablizer
+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
+

tablizer.pod

@@ -0,0 +1,122 @@
+=head1 NAME
+
+tablizer - Manipulate tabular output of other programs
+
+=head1 SYNOPSIS
+
+    Usage:
+      tablizer [regex] [file, ...] [flags]
+    
+    Flags:
+      -c, --columns string     Only show the speficied columns (separated by ,)
+      -d, --debug              Enable debugging
+      -x, --extended           Enable extended output
+      -h, --help               help for tablizer
+      -n, --no-numbering       Disable header numbering
+      -s, --separator string   Custom field separator
+      -v, --version            Print program version
+
+
+=head1 DESCRIPTION
+
+Many  programs generate  tabular  output.  But  sometimes  you need  to
+post-process these tables, you may need  to remove one or more columns
+or you may want to filter for  some pattern or you may need the output
+in another program and need to  parse it somehow.  Standard unix tools
+such as  awk(1), grep(1) or column(1)  may help, but sometimes  it's a
+tedious business.
+
+Let's take  the output of  the tool  kubectl.  It contains  cells with
+withespace and they do not separate columns by TAB characters. This is
+not easy to process.
+
+You can use B<tablizer> to do these and more things.
+
+B<tablizer> analyses the header fiels of a table, registers the column
+positions  of  each  header  field  and  separates  columns  by  those
+positions.
+
+Without any options it reads its input from C<STDIN>, but you can also
+specify a  file as a  parameter. If you want  to reduce the  output by
+some   regular   expression,   just    specify   it   as   its   first
+parameters. Hence:
+
+   # read from STDIN
+   kubectl get pods | tablizer
+
+   # read a file
+   tablizer filename
+
+   # search for pattern in a file (works like grep)
+   tablizer regex filename
+
+   # search for pattern in STDIN
+   kubectl get pods | tablizer regex
+
+The output  looks like the  original one  but every header  field will
+have a numer associated with it, e.g.:
+
+   NAME(1) READY(2) STATUS(3) RESTARTS(4) AGE(5)
+
+These numbers denote the column and  you can use them to specify which
+columns you want to have in your output:
+
+   kubectl get pods | tablizer -c1,3
+
+You can specify the numbers in any order but output will always follow
+the original order.
+
+The numbering can be suppressed by using the B<-n> option.
+
+There might be cases  when the tabular output of a  program is way too
+large  for your  current  terminal but  you still  need  to see  every
+column.  In such  cases the B<-x> option can be  usefull which enables
+I<extended mode>. In  this mode, each row will  be printed vertically,
+header  left, value  right, aligned  by  the field  widths. Here's  an
+example:
+
+    kubectl get pods | ./tablizer -x    
+        NAME: repldepl-7bcd8d5b64-7zq4l  
+       READY: 1/1    
+      STATUS: Running  
+    RESTARTS: 1 (71m ago)  
+         AGE: 5h28m
+
+You can  of course  still use  a regex  to reduce  the number  of rows
+displayed.
+
+Finally the  B<-d> option  enables debugging  output which  is mostly
+usefull for the developer.
+
+=head1 BUGS
+
+In order to report a bug, unexpected behavior, feature requests
+or to submit a patch, please open an issue on github:
+L<https://github.com/TLINDEN/tablizer/issues>.
+
+=head1 LICENSE
+
+This software is licensed under the GNU GENERAL PUBLIC LICENSE version 3.
+
+Copyright (c) 2022 by Thomas von Dein
+
+This software uses the following GO libraries:
+
+=over 4
+
+=item repr (https://github.com/alecthomas/repr)
+
+Released under the MIT License, Copyright (c) 2016 Alec Thomas
+
+=item cobra (https://github.com/spf13/cobra)
+
+Released under the Apache 2.0 license, Copyright 2013-2022 The Cobra Authors
+
+=back
+
+=head1 AUTHORS
+
+Thomas von Dein B<tom AT vondein DOT org>
+
+=cut
+