Add post-merge hook, related documentation, and tests.

diff --git a/t/t3700-add.sh b/t/t3700-add.sh
index 213e9249daa5be824f8b6e1efbc754e39f67bde7..a328bf57eb67fd96a88020f02948d380ec699496 100755 (executable)
--- a/t/t3700-add.sh
+++ b/t/t3700-add.sh
@@ -143,4 +143,16 @@ test_expect_success 'git add with filemode=0, symlinks=0 prefers stage 2 over st
        git ls-files --stage | grep "^120000 .* 0       symlink$"
 '
 
+test_expect_success 'git add --refresh' '
+       >foo && git add foo && git commit -a -m "commit all" &&
+       test -z "`git diff-index HEAD -- foo`" &&
+       git read-tree HEAD &&
+       case "`git diff-index HEAD -- foo`" in
+       :100644" "*"M   foo") echo ok;;
+       *) echo fail; (exit 1);;
+       esac &&
+       git add --refresh -- foo &&
+       test -z "`git diff-index HEAD -- foo`"
+'
+
 test_done