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100 lines
3.3 KiB
Fish
100 lines
3.3 KiB
Fish
#
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# Find files that complete $argv[1], has the suffix $argv[2], and
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# output them as completions with the optional description $argv[3] Both
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# $argv[1] and $argv[3] are optional, if only one is specified, it is
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# assumed to be the argument to complete. If $argv[4] is present, it is
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# treated as a prefix for the path, i.e. in lieu of $PWD.
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#
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function __fish_complete_suffix -d "Complete using files"
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# Variable declarations
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set -l comp
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set -l suff
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set -l desc
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set -l files
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set -l prefix ""
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switch (count $argv)
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case 1
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set comp (commandline -ct)
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set suff $argv
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set desc ""
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case 2
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set comp $argv[1]
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set suff $argv[2]
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set desc ""
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case 3
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set comp $argv[1]
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set suff $argv[2]
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set desc $argv[3]
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case 4
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set comp $argv[1]
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set suff $argv[2]
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set desc $argv[3]
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set prefix $argv[4]
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# Only directories are supported as prefixes, and to use the same logic
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# for both absolute prefixed paths and relative non-prefixed paths, $prefix
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# must terminate in a `/` if it is present, so it can be unconditionally
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# prefixed to any path to get the desired result.
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if not string match -qr '/$' $prefix
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set prefix $prefix/
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end
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end
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# Strip leading ./ as it confuses the detection of base and suffix
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# It is conditionally re-added below.
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set base $prefix(string replace -r '^("\')?\\./' '' -- $comp | string trim -c '\'"') # " make emacs syntax highlighting happy
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set -l all
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set -l dirs
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# If $comp is "./ma" and the file is "main.py", we'll catch that case here,
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# but complete.cpp will not consider it a match, so we have to output the
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# correct form.
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# Also do directory completion, since there might be files with the correct
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# suffix in a subdirectory.
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set all $base*
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set all (string match -r -- ".*"(string escape --style=regex -- $suff) $all)
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if not string match -qr '/$' -- $suff
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set dirs $base*/
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# The problem is that we now have each directory included twice in the output,
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# once as `dir` and once as `dir/`. The runtime here is O(n) for n directories
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# in the output, but hopefully since we have only one level (no nested results)
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# it should be fast. The alternative is to shell out to `sort` and remove any
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# duplicate results, but it would have to be a huge `n` to make up for the fork
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# overhead.
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for dir in $dirs
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set all (string match -v (string match -r '(.*)/$' -- $dir)[2] -- $all)
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end
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end
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set files $all $dirs
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if string match -qr '^\\./' -- $comp
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set files ./$files
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else
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# "Escape" files starting with a literal dash `-` with a `./`
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set files (string replace -r -- "^-" "./-" $files)
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end
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if set -q files[1]
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if string match -qr -- . "$desc"
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set desc "\t$desc"
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end
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if string match -qr -- . "$prefix"
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# Ideally, only replace in the beginning of the string, but we have no
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# way of doing a pcre2 escape so we can use a regex replace instead
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set files (string replace $prefix "" $files)
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end
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printf "%s$desc\n" $files
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end
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end
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