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-rw-r--r--Documentation/hooks.txt14
-rwxr-xr-xgit-checkout.sh12
-rwxr-xr-xt/t5403-post-checkout-hook.sh74
3 files changed, 100 insertions, 0 deletions
diff --git a/Documentation/hooks.txt b/Documentation/hooks.txt
index 58b9547..f110162 100644
--- a/Documentation/hooks.txt
+++ b/Documentation/hooks.txt
@@ -87,6 +87,20 @@ parameter, and is invoked after a commit is made.
This hook is meant primarily for notification, and cannot affect
the outcome of `git-commit`.
+post-checkout
+-----------
+
+This hook is invoked when a `git-checkout` is run after having updated the
+worktree. The hook is given three parameters: the ref of the previous HEAD,
+the ref of the new HEAD (which may or may not have changed), and a flag
+indicating whether the checkout was a branch checkout (changing branches,
+flag=1) or a file checkout (retrieving a file from the index, flag=0).
+This hook cannot affect the outcome of `git-checkout`.
+
+This hook can be used to perform repository validity checks, auto-display
+differences from the previous HEAD if different, or set working dir metadata
+properties.
+
post-merge
-----------
diff --git a/git-checkout.sh b/git-checkout.sh
index 17f4392..8993920 100755
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -137,6 +137,13 @@ Did you intend to checkout '$@' which can not be resolved as commit?"
git ls-files --error-unmatch -- "$@" >/dev/null || exit
git ls-files -- "$@" |
git checkout-index -f -u --stdin
+
+ # Run a post-checkout hook -- the HEAD does not change so the
+ # current HEAD is passed in for both args
+ if test -x "$GIT_DIR"/hooks/post-checkout; then
+ "$GIT_DIR"/hooks/post-checkout $old $old 0
+ fi
+
exit $?
else
# Make sure we did not fall back on $arg^{tree} codepath
@@ -284,3 +291,8 @@ if [ "$?" -eq 0 ]; then
else
exit 1
fi
+
+# Run a post-checkout hook
+if test -x "$GIT_DIR"/hooks/post-checkout; then
+ "$GIT_DIR"/hooks/post-checkout $old $new 1
+fi
diff --git a/t/t5403-post-checkout-hook.sh b/t/t5403-post-checkout-hook.sh
new file mode 100755
index 0000000..487abf3
--- /dev/null
+++ b/t/t5403-post-checkout-hook.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Josh England
+#
+
+test_description='Test the post-checkout hook.'
+. ./test-lib.sh
+
+test_expect_success setup '
+ echo Data for commit0. >a &&
+ echo Data for commit0. >b &&
+ git update-index --add a &&
+ git update-index --add b &&
+ tree0=$(git write-tree) &&
+ commit0=$(echo setup | git commit-tree $tree0) &&
+ git update-ref refs/heads/master $commit0 &&
+ git-clone ./. clone1 &&
+ git-clone ./. clone2 &&
+ GIT_DIR=clone2/.git git branch -a new2 &&
+ echo Data for commit1. >clone2/b &&
+ GIT_DIR=clone2/.git git add clone2/b &&
+ GIT_DIR=clone2/.git git commit -m new2
+'
+
+for clone in 1 2; do
+ cat >clone${clone}/.git/hooks/post-checkout <<'EOF'
+#!/bin/sh
+echo $@ > $GIT_DIR/post-checkout.args
+EOF
+ chmod u+x clone${clone}/.git/hooks/post-checkout
+done
+
+test_expect_success 'post-checkout runs as expected ' '
+ GIT_DIR=clone1/.git git checkout master &&
+ test -e clone1/.git/post-checkout.args
+'
+
+test_expect_success 'post-checkout receives the right arguments with HEAD unchanged ' '
+ old=$(awk "{print \$1}" clone1/.git/post-checkout.args) &&
+ new=$(awk "{print \$2}" clone1/.git/post-checkout.args) &&
+ flag=$(awk "{print \$3}" clone1/.git/post-checkout.args) &&
+ test $old = $new -a $flag == 1
+'
+
+test_expect_success 'post-checkout runs as expected ' '
+ GIT_DIR=clone1/.git git checkout master &&
+ test -e clone1/.git/post-checkout.args
+'
+
+test_expect_success 'post-checkout args are correct with git checkout -b ' '
+ GIT_DIR=clone1/.git git checkout -b new1 &&
+ old=$(awk "{print \$1}" clone1/.git/post-checkout.args) &&
+ new=$(awk "{print \$2}" clone1/.git/post-checkout.args) &&
+ flag=$(awk "{print \$3}" clone1/.git/post-checkout.args) &&
+ test $old = $new -a $flag == 1
+'
+
+test_expect_success 'post-checkout receives the right args with HEAD changed ' '
+ GIT_DIR=clone2/.git git checkout new2 &&
+ old=$(awk "{print \$1}" clone2/.git/post-checkout.args) &&
+ new=$(awk "{print \$2}" clone2/.git/post-checkout.args) &&
+ flag=$(awk "{print \$3}" clone2/.git/post-checkout.args) &&
+ test $old != $new -a $flag == 1
+'
+
+test_expect_success 'post-checkout receives the right args when not switching branches ' '
+ GIT_DIR=clone2/.git git checkout master b &&
+ old=$(awk "{print \$1}" clone2/.git/post-checkout.args) &&
+ new=$(awk "{print \$2}" clone2/.git/post-checkout.args) &&
+ flag=$(awk "{print \$3}" clone2/.git/post-checkout.args) &&
+ test $old == $new -a $flag == 0
+'
+
+test_done