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https://github.com/fish-shell/fish-shell
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cdfa76221e
The limit has been reduced to 2500 to match the limit on what we actually consume downstream in the actual `complete -c apt ...` rule, as discussed [0]. [0]: https://github.com/fish-shell/fish-shell/commit/b88b2577267c6837886c93c
38 lines
2.2 KiB
Fish
38 lines
2.2 KiB
Fish
function __fish_print_apt_packages
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argparse --name=__fish_print_packages i/installed -- $argv
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or return
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switch (commandline -ct)
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case '-**'
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return
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end
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type -q -f apt-cache || return 1
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if not set -q _flag_installed
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# Do not generate the cache as apparently sometimes this is slow.
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# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=547550
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# (It is safe to use `sed -r` here as we are guaranteed to be on a GNU platform
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# if apt-cache was found.)
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# Uses the UTF-8/ASCII record separator (0x1A) character.
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#
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# Note: This can include "Description:" fields which we need to include,
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# "Description-en_GB" (or another locale code) fields which we need to include
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# as well as "Description-md5" fields which we absolutely do *not* want to include
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# The regex doesn't allow numbers, so unless someone makes a hash algorithm without a number
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# in the name, we're safe. (yes, this should absolutely have a better format).
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#
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# aptitude has options that control the output formatting, but is orders of magnitude slower
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#
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# sed could probably do all of the heavy lifting here, but would be even less readable
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#
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# The `head -n 500` causes us to stop once we have 500 lines. We do it after the `sed` because
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# Debian package descriptions can be extremely long and are hard-wrapped: texlive-latex-extra
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# has about 2700 lines on Debian 11.
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apt-cache --no-generate show '.*'(commandline -ct)'.*' 2>/dev/null | sed -r '/^(Package|Description-?[a-zA-Z_]*):/!d;s/Package: (.*)/\1\t/g;s/Description-?[^:]*: (.*)/\1\x1a\n/g' | head -n 500 | string join "" | string replace --all --regex \x1a+ \n | uniq
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return 0
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else
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set -l packages (dpkg --get-selections | string replace -fr '(\S+)\s+install' "\$1" | string match -e (commandline -ct))
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apt-cache --no-generate show $packages 2>/dev/null | sed -r '/^(Package|Description-?[a-zA-Z_]*):/!d;s/Package: (.*)/\1\t/g;s/Description-?[^:]*: (.*)/\1\x1a\n/g' | head -n 500 | string join "" | string replace --all --regex \x1a+ \n | uniq
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return 0
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end
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end
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