Merge branch 'sb/submodule-recursive-absorb'

When a submodule "A", which has another submodule "B" nested within
it, is "absorbed" into the top-level superproject, the inner
submodule "B" used to be left in a strange state.  The logic to
adjust the .git pointers in these submodules has been corrected.

* sb/submodule-recursive-absorb:
submodule absorbing: fix worktree/gitdir pointers recursively for non-moves
cache.h: expose the dying procedure for reading gitlinks
setup: add gentle version of resolve_git_dir

diff --git a/cache.h b/cache.h
index 8c77b8c543269a3f2c0b3e4149830f79176fccde..e26566a8ec3f9aae6547da4303ad62c013146208 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -507,9 +507,12 @@ extern int is_nonbare_repository_dir(struct strbuf *path);
 #define READ_GITFILE_ERR_NO_PATH 6
 #define READ_GITFILE_ERR_NOT_A_REPO 7
 #define READ_GITFILE_ERR_TOO_LARGE 8
+extern void read_gitfile_error_die(int error_code, const char *path, const char *dir);
 extern const char *read_gitfile_gently(const char *path, int *return_error_code);
 #define read_gitfile(path) read_gitfile_gently((path), NULL)
-extern const char *resolve_gitdir(const char *suspect);
+extern const char *resolve_gitdir_gently(const char *suspect, int *return_error_code);
+#define resolve_gitdir(path) resolve_gitdir_gently((path), NULL)
+
 extern void set_git_work_tree(const char *tree);
 
 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"

diff --git a/setup.c b/setup.c
index 1b534a750810f3773ba9c21a5ec221f54857349b..967f289f1ef07d78f4b680e1d880e2fa86215371 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -486,6 +486,30 @@ int verify_repository_format(const struct repository_format *format,
        return 0;
 }
 
+void read_gitfile_error_die(int error_code, const char *path, const char *dir)
+{
+       switch (error_code) {
+       case READ_GITFILE_ERR_STAT_FAILED:
+       case READ_GITFILE_ERR_NOT_A_FILE:
+               /* non-fatal; follow return path */
+               break;
+       case READ_GITFILE_ERR_OPEN_FAILED:
+               die_errno("Error opening '%s'", path);
+       case READ_GITFILE_ERR_TOO_LARGE:
+               die("Too large to be a .git file: '%s'", path);
+       case READ_GITFILE_ERR_READ_FAILED:
+               die("Error reading %s", path);
+       case READ_GITFILE_ERR_INVALID_FORMAT:
+               die("Invalid gitfile format: %s", path);
+       case READ_GITFILE_ERR_NO_PATH:
+               die("No path in gitfile: %s", path);
+       case READ_GITFILE_ERR_NOT_A_REPO:
+               die("Not a git repository: %s", dir);
+       default:
+               die("BUG: unknown error code");
+       }
+}
+
 /*
  * Try to read the location of the git directory from the .git file,
  * return path to git directory if found.
@@ -559,28 +583,8 @@ const char *read_gitfile_gently(const char *path, int *return_error_code)
 cleanup_return:
        if (return_error_code)
                *return_error_code = error_code;
-       else if (error_code) {
-               switch (error_code) {
-               case READ_GITFILE_ERR_STAT_FAILED:
-               case READ_GITFILE_ERR_NOT_A_FILE:
-                       /* non-fatal; follow return path */
-                       break;
-               case READ_GITFILE_ERR_OPEN_FAILED:
-                       die_errno("Error opening '%s'", path);
-               case READ_GITFILE_ERR_TOO_LARGE:
-                       die("Too large to be a .git file: '%s'", path);
-               case READ_GITFILE_ERR_READ_FAILED:
-                       die("Error reading %s", path);
-               case READ_GITFILE_ERR_INVALID_FORMAT:
-                       die("Invalid gitfile format: %s", path);
-               case READ_GITFILE_ERR_NO_PATH:
-                       die("No path in gitfile: %s", path);
-               case READ_GITFILE_ERR_NOT_A_REPO:
-                       die("Not a git repository: %s", dir);
-               default:
-                       assert(0);
-               }
-       }
+       else if (error_code)
+               read_gitfile_error_die(error_code, path, dir);
 
        free(buf);
        return error_code ? NULL : path;
@@ -1017,11 +1021,11 @@ const char *setup_git_directory(void)
        return setup_git_directory_gently(NULL);
 }
 
-const char *resolve_gitdir(const char *suspect)
+const char *resolve_gitdir_gently(const char *suspect, int *return_error_code)
 {
        if (is_git_directory(suspect))
                return suspect;
-       return read_gitfile(suspect);
+       return read_gitfile_gently(suspect, return_error_code);
 }
 
 /* if any standard file descriptor is missing open it to /dev/null */

diff --git a/submodule.c b/submodule.c
index 4c4f033e8a0f9f23e759949209c323875cd119fc..3b98766a6bcfe983e5f94e84edd6fcec7ce74f8d 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -1437,22 +1437,57 @@ void absorb_git_dir_into_superproject(const char *prefix,
                                      const char *path,
                                      unsigned flags)
 {
-       const char *sub_git_dir, *v;
-       char *real_sub_git_dir = NULL, *real_common_git_dir = NULL;
+       int err_code;
+       const char *sub_git_dir;
        struct strbuf gitdir = STRBUF_INIT;
-
        strbuf_addf(&gitdir, "%s/.git", path);
-       sub_git_dir = resolve_gitdir(gitdir.buf);
+       sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code);
 
        /* Not populated? */
-       if (!sub_git_dir)
-               goto out;
+       if (!sub_git_dir) {
+               char *real_new_git_dir;
+               const char *new_git_dir;
+               const struct submodule *sub;
+
+               if (err_code == READ_GITFILE_ERR_STAT_FAILED) {
+                       /* unpopulated as expected */
+                       strbuf_release(&gitdir);
+                       return;
+               }
+
+               if (err_code != READ_GITFILE_ERR_NOT_A_REPO)
+                       /* We don't know what broke here. */
+                       read_gitfile_error_die(err_code, path, NULL);
+
+               /*
+               * Maybe populated, but no git directory was found?
+               * This can happen if the superproject is a submodule
+               * itself and was just absorbed. The absorption of the
+               * superproject did not rewrite the git file links yet,
+               * fix it now.
+               */
+               sub = submodule_from_path(null_sha1, path);
+               if (!sub)
+                       die(_("could not lookup name for submodule '%s'"), path);
+               new_git_dir = git_path("modules/%s", sub->name);
+               if (safe_create_leading_directories_const(new_git_dir) < 0)
+                       die(_("could not create directory '%s'"), new_git_dir);
+               real_new_git_dir = real_pathdup(new_git_dir);
+               connect_work_tree_and_git_dir(path, real_new_git_dir);
+
+               free(real_new_git_dir);
+       } else {
+               /* Is it already absorbed into the superprojects git dir? */
+               char *real_sub_git_dir = real_pathdup(sub_git_dir);
+               char *real_common_git_dir = real_pathdup(get_git_common_dir());
 
-       /* Is it already absorbed into the superprojects git dir? */
-       real_sub_git_dir = real_pathdup(sub_git_dir);
-       real_common_git_dir = real_pathdup(get_git_common_dir());
-       if (!skip_prefix(real_sub_git_dir, real_common_git_dir, &v))
-               relocate_single_git_dir_into_superproject(prefix, path);
+               if (!starts_with(real_sub_git_dir, real_common_git_dir))
+                       relocate_single_git_dir_into_superproject(prefix, path);
+
+               free(real_sub_git_dir);
+               free(real_common_git_dir);
+       }
+       strbuf_release(&gitdir);
 
        if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) {
                struct child_process cp = CHILD_PROCESS_INIT;
@@ -1478,9 +1513,4 @@ void absorb_git_dir_into_superproject(const char *prefix,
 
                strbuf_release(&sb);
        }
-
-out:
-       strbuf_release(&gitdir);
-       free(real_sub_git_dir);
-       free(real_common_git_dir);
 }

diff --git a/t/t7412-submodule-absorbgitdirs.sh b/t/t7412-submodule-absorbgitdirs.sh
index 1c47780e2bf1bccaef7176e1440946331ecaac6e..e2bbb449b6a175c6dbb9f43b08f2fa7061d5d9f5 100755 (executable)
--- a/t/t7412-submodule-absorbgitdirs.sh
+++ b/t/t7412-submodule-absorbgitdirs.sh
@@ -64,6 +64,33 @@ test_expect_success 'absorb the git dir in a nested submodule' '
        test_cmp expect.2 actual.2
 '
 
+test_expect_success 're-setup nested submodule' '
+       # un-absorb the direct submodule, to test if the nested submodule
+       # is still correct (needs a rewrite of the gitfile only)
+       rm -rf sub1/.git &&
+       mv .git/modules/sub1 sub1/.git &&
+       GIT_WORK_TREE=. git -C sub1 config --unset core.worktree &&
+       # fixup the nested submodule
+       echo "gitdir: ../.git/modules/nested" >sub1/nested/.git &&
+       GIT_WORK_TREE=../../../nested git -C sub1/.git/modules/nested config \
+               core.worktree "../../../nested" &&
+       # make sure this re-setup is correct
+       git status --ignore-submodules=none
+'
+
+test_expect_success 'absorb the git dir in a nested submodule' '
+       git status >expect.1 &&
+       git -C sub1/nested rev-parse HEAD >expect.2 &&
+       git submodule absorbgitdirs &&
+       test -f sub1/.git &&
+       test -f sub1/nested/.git &&
+       test -d .git/modules/sub1/modules/nested &&
+       git status >actual.1 &&
+       git -C sub1/nested rev-parse HEAD >actual.2 &&
+       test_cmp expect.1 actual.1 &&
+       test_cmp expect.2 actual.2
+'
+
 test_expect_success 'setup a gitlink with missing .gitmodules entry' '
        git init sub2 &&
        test_commit -C sub2 first &&