mv: Fix spurious warning when moving a file in presence of submodules

In commit 0656781fa "git mv" learned to update the submodule path in the
.gitmodules file when moving a submodule in the work tree. But since that
commit update_path_in_gitmodules() gets called no matter if we moved a
submodule or a regular file, which is wrong and leads to a bogus warning
when moving a regular file in a repo containing a .gitmodules file:

    warning: Could not find section in .gitmodules where path=<filename>

Fix that by only calling update_path_in_gitmodules() when moving a
submodule. To achieve that, we introduce the special SUBMODULE_WITH_GITDIR
define to distinguish the cases where we also have to connect work tree
and git directory from those where we only need to update the .gitmodules
setting.

A test for submodules using a .git directory together with a .gitmodules
file has been added to t7001. Even though newer git versions will always
use a gitfile when cloning submodules, repositories cloned with older git
versions will still use this layout.

Reported-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>

diff --git a/builtin/mv.c b/builtin/mv.c
index aec79d1..2e0e61b 100644 (file)
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -55,6 +55,7 @@ static const char *add_slash(const char *path)
 }
 
 static struct lock_file lock_file;
+#define SUBMODULE_WITH_GITDIR ((const char *)1)
 
 int cmd_mv(int argc, const char **argv, const char *prefix)
 {
@@ -132,6 +133,8 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
                                submodule_gitfile[i] = read_gitfile(submodule_dotgit.buf);
                                if (submodule_gitfile[i])
                                        submodule_gitfile[i] = xstrdup(submodule_gitfile[i]);
+                               else
+                                       submodule_gitfile[i] = SUBMODULE_WITH_GITDIR;
                                strbuf_release(&submodule_dotgit);
                        } else {
                                const char *src_w_slash = add_slash(src);
@@ -230,10 +233,12 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
                if (!show_only && mode != INDEX) {
                        if (rename(src, dst) < 0 && !ignore_errors)
                                die_errno (_("renaming '%s' failed"), src);
-                       if (submodule_gitfile[i])
-                               connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
-                       if (!update_path_in_gitmodules(src, dst))
-                               gitmodules_modified = 1;
+                       if (submodule_gitfile[i]) {
+                               if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
+                                       connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
+                               if (!update_path_in_gitmodules(src, dst))
+                                       gitmodules_modified = 1;
+                       }
                }
 
                if (mode == WORKING_DIRECTORY)

diff --git a/t/t7001-mv.sh b/t/t7001-mv.sh
index d432f42..b90e985 100755 (executable)
--- a/t/t7001-mv.sh
+++ b/t/t7001-mv.sh
@@ -293,6 +293,32 @@ test_expect_success 'git mv moves a submodule with a .git directory and no .gitm
        git diff-files --quiet
 '
 
+test_expect_success 'git mv moves a submodule with a .git directory and .gitmodules' '
+       rm -rf mod &&
+       git reset --hard &&
+       git submodule update &&
+       entry="$(git ls-files --stage sub | cut -f 1)" &&
+       (
+               cd sub &&
+               rm -f .git &&
+               cp -a ../.git/modules/sub .git &&
+               GIT_WORK_TREE=. git config --unset core.worktree
+       ) &&
+       mkdir mod &&
+       git mv sub mod/sub &&
+       ! test -e sub &&
+       [ "$entry" = "$(git ls-files --stage mod/sub | cut -f 1)" ] &&
+       (
+               cd mod/sub &&
+               git status
+       ) &&
+       echo mod/sub >expected &&
+       git config -f .gitmodules submodule.sub.path >actual &&
+       test_cmp expected actual &&
+       git update-index --refresh &&
+       git diff-files --quiet
+'
+
 test_expect_success 'git mv moves a submodule with gitfile' '
        rm -rf mod/sub &&
        git reset --hard &&