tg.sh: Runtime tg-* command check

[topgit.git] / tg.sh

diff --git a/tg.sh b/tg.sh
index 03a392b7ad2703e6975297c85c7290fdcf5433e6..179f0de21bdfc37893afa4d3f90f43460d330b6c 100644 (file)
--- a/tg.sh
+++ b/tg.sh
@@ -152,8 +152,21 @@ switch_to_base()
 do_help()
 {
        if [ -z "$1" ] ; then
+               ## Build available commands list for help output
+
+               cmds=
+               sep=
+               for cmd in "@cmddir@"/tg-*; do
+                       ! [ -r "$cmd" ] && continue
+                       # strip directory part and "tg-" prefix
+                       cmd="$(basename "$cmd")"
+                       cmd="${cmd#tg-}"
+                       cmds="$cmds$sep$cmd"
+                       sep="|"
+               done
+
                echo "TopGit v0.1 - A different patch queue manager"
-               echo "Usage: tg (create|delete|info|patch|summary|update|help) ..."
+               echo "Usage: tg ($cmds|help) ..."
        elif [ -f "@sharedir@/tg-$1.txt" ] ; then
                cat "@sharedir@/tg-$1.txt"
        else
@@ -171,6 +184,8 @@ root_dir="$(git rev-parse --show-cdup)"; root_dir="${root_dir:-.}"
 setup_ours
 setup_hook "pre-commit"
 
+[ -d "@cmddir@" ] ||
+       die "No command directory: '@cmddir@'"
 
 ## Dispatch
 
@@ -186,12 +201,13 @@ case "$cmd" in
 help)
        do_help "$1"
        exit 1;;
-create|delete|info|patch|summary|update)
-       . "@cmddir@"/tg-$cmd;;
 --hooks-path)
        # Internal command
        echo "@hooksdir@";;
 *)
-       echo "Unknown subcommand: $cmd" >&2
-       exit 1;;
+       [ -r "@cmddir@"/tg-$cmd ] || {
+               echo "Unknown subcommand: $cmd" >&2
+               exit 1
+       }
+       . "@cmddir@"/tg-$cmd;;
 esac