Add "git-sh-setup-script" for common git shell script setup
It sets up the normal git environment variables and a few helper
functions (currently just "die()"), and returns ok if it all looks like
a git archive. So use it something like
. git-sh-setup-script || die "Not a git archive"
to make the rest of the git scripts more careful and readable.
diff --git a/git-sh-setup-script b/git-sh-setup-script
new file mode 100644
index 0000000..660c524
--- /dev/null
+++ b/git-sh-setup-script
@@ -0,0 +1,17 @@
+#!/bin/sh
+#
+# Set up GIT_DIR and GIT_OBJECT_DIRECTORY
+# and return true if everything looks ok
+#
+: ${GIT_DIR=.git}
+: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
+
+die() {
+ echo "$@" >&2
+ exit 1
+}
+
+[ -d "$GIT_DIR" ] &&
+[ -d "$GIT_DIR/refs" ]
+[ -d "$GIT_OBJECT_DIRECTORY" ] &&
+[ -d "$GIT_OBJECT_DIRECTORY/00" ]
