Add untested rewrite

1 files changed, 27 insertions, 0 deletions

diff --git a/src/subgit-root b/src/subgit-root
new file mode 100755
index 0000000..1ef9650
--- /dev/null
+++ b/src/subgit-root
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Returns the longest subpath of the given path
+# which includes a .subgitrc file.
+
+usage() { die "Usage: subgit root [PATH]"; }
+
+while [ "$1" ]; do
+	case $1 in
+	-h) usage;;
+	--) shift; break;;
+	-*) die "Invalid option $1";;
+	*) break;;
+	esac
+done
+
+[ $# -gt 1 ] && usage
+path=$(realpath -m "${1:-.}")
+
+root=$path
+while [ 1 ]; do
+	[ -f "$root/.subgitrc" ] && break
+	[ "$root" = "/" ] && die "Not a subgit repository"
+	root=$(dirname "$root")
+done
+
+echo "$root"