Merge branch 'jc/maint-clean-nested-worktree-in-subdir'

"git clean -d -f" (not "-d -f -f") is supposed to protect nested working
trees of independent git repositories that exist in the current project
working tree from getting removed, but the protection applied only to such
working trees that are at the top-level of the current project by mistake.

* jc/maint-clean-nested-worktree-in-subdir:
clean: preserve nested git worktree in subdirectories

diff --git a/dir.c b/dir.c
index 2087d23b6bce5280e54770923cb7b7274361d667..e98760c72deb94d86a911f706f7c6c2beca58e5e 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -1172,23 +1172,27 @@ int is_empty_dir(const char *path)
        return ret;
 }
 
-int remove_dir_recursively(struct strbuf *path, int flag)
+static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
 {
        DIR *dir;
        struct dirent *e;
-       int ret = 0, original_len = path->len, len;
+       int ret = 0, original_len = path->len, len, kept_down = 0;
        int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
        int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
        unsigned char submodule_head[20];
 
        if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
-           !resolve_gitlink_ref(path->buf, "HEAD", submodule_head))
+           !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
                /* Do not descend and nuke a nested git work tree. */
+               if (kept_up)
+                       *kept_up = 1;
                return 0;
+       }
 
-       flag &= ~(REMOVE_DIR_KEEP_TOPLEVEL|REMOVE_DIR_KEEP_NESTED_GIT);
+       flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
        dir = opendir(path->buf);
        if (!dir) {
+               /* an empty dir could be removed even if it is unreadble */
                if (!keep_toplevel)
                        return rmdir(path->buf);
                else
@@ -1208,7 +1212,7 @@ int remove_dir_recursively(struct strbuf *path, int flag)
                if (lstat(path->buf, &st))
                        ; /* fall thru */
                else if (S_ISDIR(st.st_mode)) {
-                       if (!remove_dir_recursively(path, flag))
+                       if (!remove_dir_recurse(path, flag, &kept_down))
                                continue; /* happy */
                } else if (!only_empty && !unlink(path->buf))
                        continue; /* happy, too */
@@ -1220,11 +1224,22 @@ int remove_dir_recursively(struct strbuf *path, int flag)
        closedir(dir);
 
        strbuf_setlen(path, original_len);
-       if (!ret && !keep_toplevel)
+       if (!ret && !keep_toplevel && !kept_down)
                ret = rmdir(path->buf);
+       else if (kept_up)
+               /*
+                * report the uplevel that it is not an error that we
+                * did not rmdir() our directory.
+                */
+               *kept_up = !ret;
        return ret;
 }
 
+int remove_dir_recursively(struct strbuf *path, int flag)
+{
+       return remove_dir_recurse(path, flag, NULL);
+}
+
 void setup_standard_excludes(struct dir_struct *dir)
 {
        const char *path;

diff --git a/t/t7300-clean.sh b/t/t7300-clean.sh
index 800b5368a5248835bb9817c0e0c8409131306b3c..ccfb54de7ad9473221390d019b109bcb010a2c76 100755 (executable)
--- a/t/t7300-clean.sh
+++ b/t/t7300-clean.sh
@@ -399,8 +399,8 @@ test_expect_success SANITY 'removal failure' '
 '
 
 test_expect_success 'nested git work tree' '
-       rm -fr foo bar &&
-       mkdir foo bar &&
+       rm -fr foo bar baz &&
+       mkdir -p foo bar baz/boo &&
        (
                cd foo &&
                git init &&
@@ -412,15 +412,24 @@ test_expect_success 'nested git work tree' '
                cd bar &&
                >goodbye.people
        ) &&
+       (
+               cd baz/boo &&
+               git init &&
+               >deeper.world
+               git add . &&
+               git commit -a -m deeply.nested
+       ) &&
        git clean -f -d &&
        test -f foo/.git/index &&
        test -f foo/hello.world &&
+       test -f baz/boo/.git/index &&
+       test -f baz/boo/deeper.world &&
        ! test -d bar
 '
 
 test_expect_success 'force removal of nested git work tree' '
-       rm -fr foo bar &&
-       mkdir foo bar &&
+       rm -fr foo bar baz &&
+       mkdir -p foo bar baz/boo &&
        (
                cd foo &&
                git init &&
@@ -432,9 +441,17 @@ test_expect_success 'force removal of nested git work tree' '
                cd bar &&
                >goodbye.people
        ) &&
+       (
+               cd baz/boo &&
+               git init &&
+               >deeper.world
+               git add . &&
+               git commit -a -m deeply.nested
+       ) &&
        git clean -f -f -d &&
        ! test -d foo &&
-       ! test -d bar
+       ! test -d bar &&
+       ! test -d baz
 '
 
 test_expect_success 'git clean -e' '