Resolve value supplied for no-colon push refspecs

When pushing a refspec like "HEAD", we used to treat it as
"HEAD:HEAD", which didn't work without rewriting. Instead, we should
resolve the ref. If it's a symref, further require it to point to a
branch, to avoid doing anything especially unexpected. Also remove the
rewriting previously added in builtin-push.

Since the code for "HEAD" uses the regular refspec parsing, it
automatically handles "+HEAD" without anything special.

[jc: added a further test to make sure that "remote.*.push = HEAD" works]

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-push.c b/builtin-push.c
index 9f727c00f689ae23373502c7fb21b2234a1c1748..b68c6813b8c71e0e00790eb422e57f8e219095fb 100644 (file)
--- a/builtin-push.c
+++ b/builtin-push.c
@@ -44,15 +44,6 @@ static void set_refspecs(const char **refs, int nr)
                        strcat(tag, refs[i]);
                        ref = tag;
                }
-               if (!strcmp("HEAD", ref)) {
-                       unsigned char sha1_dummy[20];
-                       ref = resolve_ref(ref, sha1_dummy, 1, NULL);
-                       if (!ref)
-                               die("HEAD cannot be resolved.");
-                       if (prefixcmp(ref, "refs/heads/"))
-                               die("HEAD cannot be resolved to branch.");
-                       ref = xstrdup(ref + 11);
-               }
                add_refspec(ref);
        }
 }

diff --git a/remote.c b/remote.c
index 6b56473f5bb7d8ab2226ed83805f30c9e21ba773..8ee2487ed3af70685e6e30e46373cd3cbc6ff074 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -643,9 +643,17 @@ static int match_explicit(struct ref *src, struct ref *dst,
                errs = 1;
 
        if (!dst_value) {
+               unsigned char sha1[20];
+               int flag;
+
                if (!matched_src)
                        return errs;
-               dst_value = matched_src->name;
+               dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
+               if (!dst_value ||
+                   ((flag & REF_ISSYMREF) &&
+                    prefixcmp(dst_value, "refs/heads/")))
+                       die("%s cannot be resolved to branch.",
+                           matched_src->name);
        }
 
        switch (count_refspec_match(dst_value, dst, &matched_dst)) {

diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh
index 9d2dc33cbd0d1df19b0a9003e545104a982da694..b0d97db71c5ebeaecb019e0443ac10cb2c173361 100755 (executable)
--- a/t/t5516-fetch-push.sh
+++ b/t/t5516-fetch-push.sh
@@ -271,6 +271,49 @@ test_expect_success 'push with HEAD nonexisting at remote' '
        check_push_result $the_commit heads/local
 '
 
+test_expect_success 'push with +HEAD' '
+
+       mk_test heads/master &&
+       git checkout master &&
+       git branch -D local &&
+       git checkout -b local &&
+       git push testrepo master local &&
+       check_push_result $the_commit heads/master &&
+       check_push_result $the_commit heads/local &&
+
+       # Without force rewinding should fail
+       git reset --hard HEAD^ &&
+       ! git push testrepo HEAD &&
+       check_push_result $the_commit heads/local &&
+
+       # With force rewinding should succeed
+       git push testrepo +HEAD &&
+       check_push_result $the_first_commit heads/local
+
+'
+
+test_expect_success 'push with config remote.*.push = HEAD' '
+
+       mk_test heads/local &&
+       git checkout master &&
+       git branch -f local $the_commit &&
+       (
+               cd testrepo &&
+               git checkout local &&
+               git reset --hard $the_first_commit
+       ) &&
+       git config remote.there.url testrepo &&
+       git config remote.there.push HEAD &&
+       git config branch.master.remote there &&
+       git push &&
+       check_push_result $the_commit heads/master &&
+       check_push_result $the_first_commit heads/local
+'
+
+# clean up the cruft left with the previous one
+git config --remove-section remote.there
+git config --remove-section branch.master
+
 test_expect_success 'push with dry-run' '
 
        mk_test heads/master &&