YEXPAND(1)

💅 yexpand(1) — General Commands Manual 🎀

okay bestie, welcome to the yexpand(1) page, straight out of the General Commands Manual ✨

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🌸 NAME 🌸

yexpand — a tool to expand environment variables in Nypatchy cradles 🧚

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⭐ SYNOPSIS ⭐

yexpand inputfile [ outputfile ]

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💖 DESCRIPTION 💖

so yexpand is, and I cannot stress this enough, a very simple script 🔥 its whole job is to expand environment variables inside a text file into their current values from the shell environment. that's it, that's the gig 💅

it was written to be used with nypatchy cradles, periodt. and honestly? the author is literally begging you: do not try to use it for anything else 👑 (go look at BUGS below, it's giving cautionary tale 😭).

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🦋 USAGE 🦋

okay so here's the whole vibe:

• yexpand takes inputfile as input 📥
• it replaces all instances of shell variables — written in the form $VARIABLE or ${VARIABLE} — with their current values in the environment 🌈
• and it saves the result to outputfile 💾
• undefined variables? they get replaced with the empty string, no questions asked 💀
• if outputfile isn't given, the result gets saved to the current directory instead, as a file with the same name as inputfile 🙈
• which means... an input file sitting in the current directory will be overwritten 😭

like, actually overwritten. main character energy but make it destructive 🫶

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💀 BUGS 💀

bestie. buckle up. this script is very simple-minded 🧠✨

since it basically just echoes its input file as a here-doc, it will attempt to perform all types of shell substitution (command substitution, etc.) — not just variable substitution 🔥 so yeah, it's likely to fail on anything except the very simplest text files 💅 ngl that's a whole mood.

additionally, this script creates a temporary file 📄 the file is created in the current directory, so there should not be security implications 🌸 but heads up: any existing file named file.yexp (where file is the basename of inputfile) in the current directory will be overwritten and then deleted 😭💀

fr fr, check your directory before you run this, i'm literally begging 🙏

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👑 SEE ALSO 👑

fcasplit(1), nycheck(1), nydiff(1), nyindex(1), nylist(1), nymerge(1), nypatchy(1), nyshell(1), nysynopt(1), nytidy(1)

the reference manual for the Nypatchy suite of programs is available in compressed PostScript format at the following URL:

http://wwwasdoc.web.cern.ch/wwwasdoc/psdir/p5refman.ps.gz

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🎀 AUTHOR 🎀

this manual page was written by Kevin McCarty <kmccarty@debian.org> for the Debian GNU/Linux system (but may be used by others) 🫶 it is licensed under the GNU General Public License, version 2 or later (at your choice) ⭐

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🌈 COPYRIGHT 🌈

Copyright (C) Kevin B. McCarty, 2008.

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and that's the whole page, bestie ✨ written up and dated Mar 12, 2008 — iconic, timeless, lowkey legendary 💜 🦋