LLTSV(1)

💖 LLTSV(1) 💖

okay bestie, sit down, hydrate, and let me tell you about lltsv from the User Commands section of the manual. this one's a little legend and you're gonna be obsessed. 🫶

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✨ NAME ✨

lltsv — List specified keys of LTSV (Labeled Tab Separated Values)

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🌸 SYNOPSIS 🌸

lltsv [global options] command [command options] [arguments...]

lltsv [--key value] [-k value] [--no-key] [-K] [--ignore-key value] [-i
value] [--filter value] [-f value] [--expr value] [-e value] [--help]
[-h] [--version] [-v]

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💅 DESCRIPTION 💅

so lltsv is a command line tool that lists the keys you asked for out of LTSV (Labeled Tab Separated Values) text, and it gives you colorized output when you're on a terminal. iconic behavior, honestly.

it also supports filtering with a bunch of comparing operators — either arithmetic expressions or regular expressions. it's giving Swiss Army knife but make it cute. 🔥

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👑 OPTIONS 👑

• --key value — the keys you wanna output (if you want multiple, separate them with ,)
• --no-key, -K — output without keys (and, fair warning, without color either)
• --ignore-key value, -i value — keys to leave out of the output (multiple keys separated by ,)
• --filter value, -f value — filter expression for what gets output
• --expr value, -e value — evaluate a value by expression and output it
• --help, -h — show help
• --version, -v — print the version

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🌈 EXAMPLES 🌈

Example1 ✨

$ echo "foo:aaa\tbar:bbb" | lltsv -k foo,bar

foo:aaa   bar:bbb

the output is colorized by default when you're outputting to a terminal. the coloring is disabled if you pipe or redirect the outputs — so don't be confused when the colors ghost you, that's just how it works. 💀

Example2 ✨

$ echo "foo:aaa\tbar:bbb" | lltsv -k foo,bar -K

aaa       bbb

the -K option eliminates the labels. bye labels, you did nothing wrong but you gotta go. 🙈

Example3 ✨

$ lltsv -k foo,bar -K file*.log

you can specify input files as arguments. yes, globs, she eats. 🍓

Example4 ✨

$ lltsv -k resptime,status,uri -f 'resptime > 6' access_log

$ lltsv -k resptime,status,uri -f 'resptime > 6' -f 'uri =~
^/foo' access_log

filter the output with the -f option. the available comparing operators are:

• >= > == < <= — arithmetic (float64)
• == ==* != !=* — string comparison (string)
• =~ !~ =~* !~* — regular expression (string)

the comparing operators that end in * behave case-insensitive. and yes, you can stack multiple -f options — that's an AND condition, so every filter has to agree. no cap. 💜

Example5 ✨

$ lltsv -k resptime,upstream_resptime,diff -f 'diff = resptime -
upstream_resptime' access_log

$ lltsv -k resptime,upstream_resptime,diff_ms -e 'diff_ms =
(resptime - upstream_resptime) * 1000' access_log

evaluate a value with the -e option. the available operators are: + - * / — arithmetic (float64). math class but it actually serves. 🧚

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🎀 AUTHOR 🎀

sonots <sonots@gmail.com> — the main character who made all of this happen. 👑

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🦋 SEE ALSO 🦋

https://github.com/sonots/lltsv

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and that's the whole vibe check bestie! this page came from the lltsv manual, dated September 2020, and it's literally just LLTSV(1) — go forth and tab-separate your little heart out. slay, periodt. 💖✨🎀