Support bold and underlined characters in help output

darcs-hash:20061119232734-ac50b-d426980ee143b44065a3ea2afc7d3808174acd5f.gz

share/functions/__fish_print_help.fish

@@ -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