gsu: Avoid duplication of command regex.
[gsu.git] / funcs / gsu
index 3f7d379..63e0acf 100644 (file)
--- a/funcs/gsu
+++ b/funcs/gsu
@@ -1,6 +1,6 @@
 #!/bin/bash
 # gsu -- the global subcommand utility
-# (C) 2006-2010 Andre Noll
+# (C) 2006-2011 Andre Noll
 
 _gsu_init_errors()
 {
@@ -137,13 +137,16 @@ _gsu_usage()
 }
 export -f _gsu_usage
 
+# Each line matching this is recognized as a subcommand. The name
+# of the subcommand is the first subexpression.
+export gsu_command_regex='^com_\([a-zA-Z_0-9]\+\)()'
+
 _gsu_available_commands()
 {
-       result="$( (printf "help\nman\nprefs\n"; grep "^com_[a-z_]\+()" $0) \
-               | sed -e 's/^com_//' -e 's/()//' \
-               | sort \
-               | tr '\n' ' ')"
-       ret=$GSU_SUCCESS
+       result="$({
+               printf "help\nman\nprefs\n"
+               sed -ne "s/$gsu_command_regex/\1/g;T;p" $0
+               } | sort | tr '\n' ' ')"
 }
 export -f _gsu_available_commands
 
@@ -281,13 +284,13 @@ _com_help()
                        printf "com_help()\n$gsu_help_txt" | head -n 4; echo "--"
                        printf "com_man()\n$gsu_man_txt" | head -n 4; echo "--"
                        printf "com_prefs()\n$gsu_prefs_txt" | head -n 4; echo "--"
-                       grep -A 2 "^com_\([a-zA-Z_0-9]\+\)()" $0
+                       grep -A 2 "$gsu_command_regex" $0
                } | grep -v -- '--' \
-                       | sed -e '/^com_\([a-zA-Z_0-9]\+\)()/bs' \
+                       | sed -e "/$gsu_command_regex/bs" \
                                -e 'H;$!d;x;s/\n//g;b' \
                                -e :s \
                                -e 'x;s/\n//g;${p;x;}' \
-                       | sed -e 's/^com_\([a-zA-Z_0-9]\+\)()#*/\1\t/' \
+                       | sed -e "s/${gsu_command_regex}#*/\1\t/" \
                        | sort \
                        | while read a b; do
                                printf "$a\t"