3789

I accidentally got rid of git snapshotting of lessons back when I switched
to testable file primitives last December (commit 3705).

>:-(

Bringing it back now, hopefully better. The improvement is that there's
now at most one commit every time we hit F4.

This change adds yet another reason that running `mu` from a different
directory is just not supported.

1 files changed, 11 insertions, 0 deletions

diff --git a/snapshot_lesson b/snapshot_lesson
new file mode 100755
index 00000000..2a943c37
--- /dev/null
+++ b/snapshot_lesson
@@ -0,0 +1,11 @@
+#!/bin/sh
+# Hacky little helper called from edit/ and sandbox/ apps to save a snapshot
+# of lesson/ using git.
+
+test -d lesson/.git || exit 0  # give up if it's not a git repo
+
+cd lesson
+# explicitly say '--all' for git 1.9
+git add --all .
+# bug in git: git diff -q messes up --exit-code
+git diff HEAD --exit-code >/dev/null || git commit -a -m . >/dev/null