X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=tg.sh;h=ffc120a9bedc18b0bde6501f4264c58fd1c92465;hb=8cf11543aebd8cf79555a1668f718e8950e3e4a8;hp=30217e9369ab56bdd84290531bb2e7dd7c82f196;hpb=ced323f9e0c5d7e3f009aa33d53f6fb514143bed;p=topgit.git

diff --git a/tg.sh b/tg.sh
index 30217e9..ffc120a 100644
--- a/tg.sh
+++ b/tg.sh
@@ -18,6 +18,20 @@ die()
 	exit 1
 }
 
+# Make sure we are in the worktree, not under .git; die otherwise
+ensure_git_repo_or_die()
+{
+	local is_inside_repo is_inside_git_dir
+	is_inside_repo=1
+	is_inside_git_dir=$(git rev-parse --is-inside-git-dir 2>/dev/null) ||
+		is_inside_repo=0
+
+	case "$is_inside_repo/$is_inside_git_dir" in
+	0*) die "Cannot run outside of a Git repository.";;
+	1/true) die "Cannot run from inside \`.git\` hierarchy, please switch to work-tree.";;
+	esac
+}
+
 # cat_file TOPIC:PATH [FROM]
 # cat the file PATH from branch TOPIC when FROM is empty.
 # FROM can be -i or -w, than the file will be from the index or worktree,
@@ -427,6 +441,8 @@ get_temp()
 [ -d "@cmddir@" ] ||
 	die "No command directory: '@cmddir@'"
 
+ensure_git_repo_or_die
+
 ## Initial setup
 
 set -e