path: root/builtin/receive-pack.c
diff options
authorJunio C Hamano <>2015-04-01 06:15:45 (GMT)
committerJunio C Hamano <>2015-04-02 05:40:10 (GMT)
commit1a51b52422e055e433dec9a496621341d70d38ff (patch)
tree771ce6613ff70e626aeaaaf137ba7a8019b7b679 /builtin/receive-pack.c
parent0855331941b723b227e93b33955bbe0b45025659 (diff)
push-to-deploy: allow pushing into an unborn branch and updating it
Setting receive.denycurrentbranch to updateinstead and pushing into the current branch, when the working tree and the index is truly clean, is supposed to reset the working tree and the index to match the tree of the pushed commit. This did not work when pushing into an unborn branch. The code that drives push-to-checkout hook needs no change, as the interface is defined so that hook can decide what to do when the push is coming to an unborn branch and take an appropriate action since the beginning. Acked-by: Johannes Schindelin <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'builtin/receive-pack.c')
1 files changed, 20 insertions, 1 deletions
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index fc8ec9c..0c0a261 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -733,6 +733,22 @@ static int update_shallow_ref(struct command *cmd, struct shallow_info *si)
return 0;
+ * NEEDSWORK: we should consolidate various implementions of "are we
+ * on an unborn branch?" test into one, and make the unified one more
+ * robust. !get_sha1() based check used here and elsewhere would not
+ * allow us to tell an unborn branch from corrupt ref, for example.
+ * For the purpose of fixing "deploy-to-update does not work when
+ * pushing into an empty repository" issue, this should suffice for
+ * now.
+ */
+static int head_has_history(void)
+ unsigned char sha1[20];
+ return !get_sha1("HEAD", sha1);
static const char *push_to_deploy(unsigned char *sha1,
struct argv_array *env,
const char *work_tree)
@@ -745,7 +761,7 @@ static const char *push_to_deploy(unsigned char *sha1,
const char *diff_index[] = {
"diff-index", "--quiet", "--cached", "--ignore-submodules",
- "HEAD", "--", NULL
+ NULL, "--", NULL
const char *read_tree[] = {
"read-tree", "-u", "-m", NULL, NULL
@@ -772,6 +788,9 @@ static const char *push_to_deploy(unsigned char *sha1,
if (run_command(&child))
return "Working directory has unstaged changes";
+ /* diff-index with either HEAD or an empty tree */
+ diff_index[4] = head_has_history() ? "HEAD" : EMPTY_TREE_SHA1_HEX;
child.argv = diff_index;
child.env = env->argv;