package cmd var manpage = ` NAME tablizer - Manipulate tabular output of other programs SYNOPSIS Usage: tablizer [regex] [file, ...] [flags] Flags: -c, --columns string Only show the speficied columns (separated by ,) -d, --debug Enable debugging -h, --help help for tablizer -v, --invert-match select non-matching rows -m, --man Display manual page -n, --no-numbering Disable header numbering -N, --no-color Disable pattern highlighting -o, --output string Output mode - one of: orgtbl, markdown, extended, ascii(default) -X, --extended Enable extended output -M, --markdown Enable markdown table output -O, --orgtbl Enable org-mode table output -s, --separator string Custom field separator -v, --version Print program version 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 (See PATTERNS) 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 tablizer to do these and more things. 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 "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 parameter. You may also use the -v option to exclude all rows which match the pattern. 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 -n option. By default, if a pattern has been speficied, matches will be highlighted. You can disable this behavior with the -N option. Finally the -d option enables debugging output which is mostly usefull for the developer. 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: . If you want to read a more comprehensive documentation about the topic and have perl installed you can read it with: perldoc perlre Or read it online: . A note on modifiers: the regexp engine used in tablizer uses another modifier syntax: (?MODIFIER) The most important modifiers are: "i" ignore case "m" multiline mode "s" single line mode Example for a case insensitve search: kubectl get pods -A | tablizer "(?i)account" OUTPUT MODES 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 -o extended or -X option can be usefull which enables *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 -o extended 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. The option -o shell can be used if the output has to be processed by the shell, it prints variable assignments for each cell, one line per row: kubectl get pods | ./tablizer -o extended ./tablizer -o shell NAME="repldepl-7bcd8d5b64-7zq4l" READY="1/1" STATUS="Running" RESTARTS="9 (47m ago)" AGE="4d23h" NAME="repldepl-7bcd8d5b64-m48n8" READY="1/1" STATUS="Running" RESTARTS="9 (47m ago)" AGE="4d23h" NAME="repldepl-7bcd8d5b64-q2bf4" READY="1/1" STATUS="Running" RESTARTS="9 (47m ago)" AGE="4d23h" You can use this in an eval loop. Beside normal ascii mode (the default) and extended mode there are more output modes available: orgtbl which prints an Emacs org-mode table and markdown which prints a Markdown table. BUGS In order to report a bug, unexpected behavior, feature requests or to submit a patch, please open an issue on github: . 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: repr (https://github.com/alecthomas/repr) Released under the MIT License, Copyright (c) 2016 Alec Thomas cobra (https://github.com/spf13/cobra) Released under the Apache 2.0 license, Copyright 2013-2022 The Cobra Authors AUTHORS Thomas von Dein tom AT vondein DOT org `