Merge branch 'bw/push-options-recursively-to-submodules' into maint

"git push --recurse-submodules $there HEAD:$target" was not
propagated down to the submodules, but now it is.

* bw/push-options-recursively-to-submodules:
  submodule--helper: teach push-check to handle HEAD

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 3a3c9ca..895555c 100644 (file)
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1108,9 +1108,28 @@ static int resolve_remote_submodule_branch(int argc, const char **argv,
 static int push_check(int argc, const char **argv, const char *prefix)
 {
        struct remote *remote;
+       const char *superproject_head;
+       char *head;
+       int detached_head = 0;
+       struct object_id head_oid;
 
-       if (argc < 2)
-               die("submodule--helper push-check requires at least 1 argument");
+       if (argc < 3)
+               die("submodule--helper push-check requires at least 2 arguments");
+
+       /*
+        * superproject's resolved head ref.
+        * if HEAD then the superproject is in a detached head state, otherwise
+        * it will be the resolved head ref.
+        */
+       superproject_head = argv[1];
+       argv++;
+       argc--;
+       /* Get the submodule's head ref and determine if it is detached */
+       head = resolve_refdup("HEAD", 0, head_oid.hash, NULL);
+       if (!head)
+               die(_("Failed to resolve HEAD as a valid ref."));
+       if (!strcmp(head, "HEAD"))
+               detached_head = 1;
 
        /*
         * The remote must be configured.
@@ -1133,18 +1152,30 @@ static int push_check(int argc, const char **argv, const char *prefix)
                        if (rs->pattern || rs->matching)
                                continue;
 
-                       /*
-                        * LHS must match a single ref
-                        * NEEDSWORK: add logic to special case 'HEAD' once
-                        * working with submodules in a detached head state
-                        * ceases to be the norm.
-                        */
-                       if (count_refspec_match(rs->src, local_refs, NULL) != 1)
+                       /* LHS must match a single ref */
+                       switch (count_refspec_match(rs->src, local_refs, NULL)) {
+                       case 1:
+                               break;
+                       case 0:
+                               /*
+                                * If LHS matches 'HEAD' then we need to ensure
+                                * that it matches the same named branch
+                                * checked out in the superproject.
+                                */
+                               if (!strcmp(rs->src, "HEAD")) {
+                                       if (!detached_head &&
+                                           !strcmp(head, superproject_head))
+                                               break;
+                                       die("HEAD does not match the named branch in the superproject");
+                               }
+                       default:
                                die("src refspec '%s' must name a ref",
                                    rs->src);
+                       }
                }
                free_refspec(refspec_nr, refspec);
        }
+       free(head);
 
        return 0;
 }

diff --git a/submodule.c b/submodule.c
index 6531c5d..36f45f5 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -1015,7 +1015,8 @@ static int push_submodule(const char *path,
  * Perform a check in the submodule to see if the remote and refspec work.
  * Die if the submodule can't be pushed.
  */
-static void submodule_push_check(const char *path, const struct remote *remote,
+static void submodule_push_check(const char *path, const char *head,
+                                const struct remote *remote,
                                 const char **refspec, int refspec_nr)
 {
        struct child_process cp = CHILD_PROCESS_INIT;
@@ -1023,6 +1024,7 @@ static void submodule_push_check(const char *path, const struct remote *remote,
 
        argv_array_push(&cp.args, "submodule--helper");
        argv_array_push(&cp.args, "push-check");
+       argv_array_push(&cp.args, head);
        argv_array_push(&cp.args, remote->name);
 
        for (i = 0; i < refspec_nr; i++)
@@ -1061,10 +1063,20 @@ int push_unpushed_submodules(struct oid_array *commits,
         * won't be propagated due to the remote being unconfigured (e.g. a URL
         * instead of a remote name).
         */
-       if (remote->origin != REMOTE_UNCONFIGURED)
+       if (remote->origin != REMOTE_UNCONFIGURED) {
+               char *head;
+               struct object_id head_oid;
+
+               head = resolve_refdup("HEAD", 0, head_oid.hash, NULL);
+               if (!head)
+                       die(_("Failed to resolve HEAD as a valid ref."));
+
                for (i = 0; i < needs_pushing.nr; i++)
                        submodule_push_check(needs_pushing.items[i].string,
-                                            remote, refspec, refspec_nr);
+                                            head, remote,
+                                            refspec, refspec_nr);
+               free(head);
+       }
 
        /* Actually push the submodules */
        for (i = 0; i < needs_pushing.nr; i++) {

diff --git a/t/t5531-deep-submodule-push.sh b/t/t5531-deep-submodule-push.sh
index beff65b..0f84a53 100755 (executable)
--- a/t/t5531-deep-submodule-push.sh
+++ b/t/t5531-deep-submodule-push.sh
@@ -533,7 +533,8 @@ test_expect_success 'push propagating refspec to a submodule' '
        # Fails when refspec includes an object id
        test_must_fail git -C work push --recurse-submodules=on-demand origin \
                "$(git -C work rev-parse branch2):refs/heads/branch2" &&
-       # Fails when refspec includes 'HEAD' as it is unsupported at this time
+       # Fails when refspec includes HEAD and parent and submodule do not
+       # have the same named branch checked out
        test_must_fail git -C work push --recurse-submodules=on-demand origin \
                HEAD:refs/heads/branch2 &&
 
@@ -548,4 +549,26 @@ test_expect_success 'push propagating refspec to a submodule' '
        test_cmp expected_pub actual_pub
 '
 
+test_expect_success 'push propagating HEAD refspec to a submodule' '
+       git -C work/gar/bage checkout branch2 &&
+       > work/gar/bage/junk12 &&
+       git -C work/gar/bage add junk12 &&
+       git -C work/gar/bage commit -m "Twelfth junk" &&
+
+       git -C work checkout branch2 &&
+       git -C work add gar/bage &&
+       git -C work commit -m "updating gar/bage in branch2" &&
+
+       # Passes since the superproject and submodules HEAD are both on branch2
+       git -C work push --recurse-submodules=on-demand origin \
+               HEAD:refs/heads/branch2 &&
+
+       git -C submodule.git rev-parse branch2 >actual_submodule &&
+       git -C pub.git rev-parse branch2 >actual_pub &&
+       git -C work/gar/bage rev-parse branch2 >expected_submodule &&
+       git -C work rev-parse branch2 >expected_pub &&
+       test_cmp expected_submodule actual_submodule &&
+       test_cmp expected_pub actual_pub
+'
+
 test_done