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__fish_complete_suffix: Remove eval

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This use of eval is unsafe, not really all that useful and can spew
errors that can't be suppressed. So let's remove it, and in future add
a thing that can do expansions in a safe manner

Fixes #6456.
This commit is contained in:
Fabian Homborg 2019-12-28 17:02:31 +01:00
parent 0866013280
commit b0e3cc4b5c
1 changed files with 4 additions and 16 deletions
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20
share/functions/__fish_complete_suffix.fish
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@ -51,8 +51,6 @@ function __fish_complete_suffix -d "Complete using files"
# Strip leading ./ as it confuses the detection of base and suffix
# It is conditionally re-added below.
set base $prefix(string replace -r '^("\')?\\./' '' -- $comp | string trim -c '\'"') # " make emacs syntax highlighting happy
# echo "base: $base" > /dev/tty
# echo "suffix: $suff" > /dev/tty
set -l all
set -l dirs
@ -61,11 +59,10 @@ function __fish_complete_suffix -d "Complete using files"
# correct form.
# Also do directory completion, since there might be files with the correct
# suffix in a subdirectory. `eval` is used since $suff may be passed in
# as {.foo,.bar} and we want to expand that.
eval "set all $base*$suff"
# suffix in a subdirectory.
set all $base*$suff
if not string match -qr '/$' -- $suff
eval "set dirs $base*/"
set dirs $base*/
# The problem is that we now have each directory included twice in the output,
# once as `dir` and once as `dir/`. The runtime here is O(n) for n directories
@ -86,15 +83,6 @@ function __fish_complete_suffix -d "Complete using files"
set files (string replace -r -- "^-" "./-" $files)
end
# Another problem is that expanded paths are not matched, either.
# So an expression like $HOME/foo*.zip will expand to /home/rdahl/foo-bar.zip
# but that no longer matches the expression at the command line.
if string match -qr '[${}*~]' -- $comp
set -l expanded
eval "set expanded $comp"
set files (string replace -- $expanded $comp $files)
end
if set -q files[1]
if string match -qr -- . "$desc"
set desc "\t$desc"
@ -104,7 +92,7 @@ function __fish_complete_suffix -d "Complete using files"
# way of doing a pcre2 escape so we can use a regex replace instead
set files (string replace $prefix "" $files)
end
printf "%s$desc\n" $files #| sort -u
printf "%s$desc\n" $files
end
end