Merge branch 'bk/submodule-in-recursive-merge'

* bk/submodule-in-recursive-merge:
submodule: Search for merges only at end of recursive merge
submodule: Demonstrate known breakage during recursive merge

diff --git a/merge-recursive.c b/merge-recursive.c
index c34a4f148b65cf81f28e2aed6c35e141e175b324..cc664c39b66b0bb499dec13a22880a6096423fa6 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -946,8 +946,10 @@ static struct merge_file_info merge_file_1(struct merge_options *o,
                        free(result_buf.ptr);
                        result.clean = (merge_status == 0);
                } else if (S_ISGITLINK(a->mode)) {
-                       result.clean = merge_submodule(result.sha, one->path, one->sha1,
-                                                      a->sha1, b->sha1);
+                       result.clean = merge_submodule(result.sha,
+                                                      one->path, one->sha1,
+                                                      a->sha1, b->sha1,
+                                                      !o->call_depth);
                } else if (S_ISLNK(a->mode)) {
                        hashcpy(result.sha, a->sha1);
 

diff --git a/submodule.c b/submodule.c
index 0b709bc2914335853e7525076f5e1d026d5dd779..0fd10a0fdbf5d1af10819dea808b43f6b13b98a8 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -794,7 +794,7 @@ static void print_commit(struct commit *commit)
 
 int merge_submodule(unsigned char result[20], const char *path,
                    const unsigned char base[20], const unsigned char a[20],
-                   const unsigned char b[20])
+                   const unsigned char b[20], int search)
 {
        struct commit *commit_base, *commit_a, *commit_b;
        int parent_count;
@@ -849,6 +849,10 @@ int merge_submodule(unsigned char result[20], const char *path,
         * user needs to confirm the resolution.
         */
 
+       /* Skip the search if makes no sense to the calling context.  */
+       if (!search)
+               return 0;
+
        /* find commit which merges them */
        parent_count = find_first_merges(&merges, path, commit_a, commit_b);
        switch (parent_count) {

diff --git a/submodule.h b/submodule.h
index 799c22d6c6a459756983420960bc099da20336b3..80e04f3c8cfe9a49865ef54f61efaa3bc67dca5c 100644 (file)
--- a/submodule.h
+++ b/submodule.h
@@ -28,7 +28,7 @@ int fetch_populated_submodules(int num_options, const char **options,
                               int quiet);
 unsigned is_submodule_modified(const char *path, int ignore_untracked);
 int merge_submodule(unsigned char result[20], const char *path, const unsigned char base[20],
-                   const unsigned char a[20], const unsigned char b[20]);
+                   const unsigned char a[20], const unsigned char b[20], int search);
 int check_submodule_needs_pushing(unsigned char new_sha1[20], const char *remotes_name);
 
 #endif

diff --git a/t/t7405-submodule-merge.sh b/t/t7405-submodule-merge.sh
index a8fb30b7921dd17f910d48e82fbb2374fcb45ac3..0d5b42a25bbe79d3fb7b09ce4bf5107ee55928e5 100755 (executable)
--- a/t/t7405-submodule-merge.sh
+++ b/t/t7405-submodule-merge.sh
@@ -228,4 +228,55 @@ test_expect_success 'merging with a modify/modify conflict between merge bases'
        git merge d
 '
 
+# canonical criss-cross history in top and submodule
+test_expect_success 'setup for recursive merge with submodule' '
+       mkdir merge-recursive &&
+       (cd merge-recursive &&
+        git init &&
+        mkdir sub &&
+        (cd sub &&
+         git init &&
+         test_commit a &&
+         git checkout -b sub-b master &&
+         test_commit b &&
+         git checkout -b sub-c master &&
+         test_commit c &&
+         git checkout -b sub-bc sub-b &&
+         git merge sub-c &&
+         git checkout -b sub-cb sub-c &&
+         git merge sub-b &&
+         git checkout master) &&
+        git add sub &&
+        git commit -m a &&
+        git checkout -b top-b master &&
+        (cd sub && git checkout sub-b) &&
+        git add sub &&
+        git commit -m b &&
+        git checkout -b top-c master &&
+        (cd sub && git checkout sub-c) &&
+        git add sub &&
+        git commit -m c &&
+        git checkout -b top-bc top-b &&
+        git merge -s ours --no-commit top-c &&
+        (cd sub && git checkout sub-bc) &&
+        git add sub &&
+        git commit -m bc &&
+        git checkout -b top-cb top-c &&
+        git merge -s ours --no-commit top-b &&
+        (cd sub && git checkout sub-cb) &&
+        git add sub &&
+        git commit -m cb)
+'
+
+# merge should leave submodule unmerged in index
+test_expect_success 'recursive merge with submodule' '
+       (cd merge-recursive &&
+        test_must_fail git merge top-bc &&
+        echo "160000 $(git rev-parse top-cb:sub) 2     sub" > expect2 &&
+        echo "160000 $(git rev-parse top-bc:sub) 3     sub" > expect3 &&
+        git ls-files -u > actual &&
+        grep "$(cat expect2)" actual > /dev/null &&
+        grep "$(cat expect3)" actual > /dev/null)
+'
+
 test_done