Re: [PATCH] Allow help/--help/-h to be run outside of a TopGit repo

The user ought to be able to call `tg help` from anywhere in the filesystem,
not just Git repositories, so the help parsing has to happen before the calls
to git git binary.

Debian bug: #501982

Signed-off-by: martin f. krafft <redacted>

---
 tg.sh |   28 +++++++++++++++++++++++++---
 1 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/tg.sh b/tg.sh
index 4dcc15e..258f8ce 100644
--- a/tg.sh
+++ b/tg.sh

@@ -235,12 +235,37 @@ do_help()
 	fi
 }
 
+# Check whether we are supposed to output the help message
+should_do_help()
+{
+	# we are being sourced for utility functions, never run help
+	[ -z "$tg__include" ] || return 1
+
+	local prev
+	while [ -n "$1" ]; do
+		case "$1" in
+		help|--help|-h)
+			shift
+			echo "${1:-$prev}"
+			return 0
+		esac
+		prev="$1"
+		shift
+	done
+
+	# run help when there was no previous topic, meaning that there where
+	# no arguments at all
+	test -z "$prev"
+}
 
 ## Startup
 
 [ -d "@cmddir@" ] ||
 	die "No command directory: '@cmddir@'"
 
+# check if we should run help and get the topic while we're at it
+help_topic="$(should_do_help "$@")" && { do_help "$help_topic"; exit 0; }
+