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Support bold and underlined characters in help output

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darcs-hash:20061119232734-ac50b-d426980ee143b44065a3ea2afc7d3808174acd5f.gz
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axel 2006-11-20 09:27:34 +10:00
parent dd061b1dda
commit 372c811763
1 changed files with 22 additions and 2 deletions
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24
share/functions/__fish_print_help.fish
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@ -1,7 +1,27 @@
function __fish_print_help
function __fish_print_help -d (N_ "Print help message for the specified fish function or builtin")
# These two expressions take care of underlines (Should be italic)
set -l cmd1 s/_\x08'\(.\)'/(set_color --underline)\\1(set_color normal)/g
set -l cmd2 s/'\(.\)'\x08_/(set_color --underline)\\1(set_color normal)/g
# This expression should take care of bold characters. It's not
# waterproof, since it doesn't check that the same character is
# used both before and after the backspace, since regular
# languages don't allow backreferences.
set -l cmd3 s/.\x08'\(.\)'/(set_color --bold)\\1(set_color normal)/g
# Combine all expressions in a single variable
set -l sed_cmd -e $cmd1 -e $cmd2 -e $cmd3
# Render help output, save output into the variable 'help'
set -l help (nroff -man $__fish_datadir/man/$argv.1)
set -l lines (count $help)
# Print an empty line first
echo
printf "%s\n" $help| tail -n (expr $lines - 5 ) | head -n (expr $lines - 8)
# Filter and print help
printf "%s\n" $help| tail -n (expr $lines - 5 ) | head -n (expr $lines - 8) | sed $sed_cmd
end