If the work tree contains an untracked file x, and
unpack-trees wants to checkout a path x/*, the
file x is removed unconditionally.
Instead, apply the same checks that are normally
used for untracked files, and abort if the file
cannot be removed.
Signed-off-by: Clemens Buchacher <drizzd@xxxxxx>
---
It's not exactly pretty. But it's the best solution I could find
without major refactoring.
Clemens
cache.h | 2 +-
symlinks.c | 21 ++++++++++++++++-----
t/t7607-merge-overwrite.sh | 2 +-
unpack-trees.c | 16 +++++++++++++---
4 files changed, 31 insertions(+), 10 deletions(-)
diff --git a/cache.h b/cache.h
index 2ef2fa3..f65d6f9 100644
--- a/cache.h
+++ b/cache.h
@@ -852,7 +852,7 @@ struct cache_def {
extern int has_symlink_leading_path(const char *name, int len);
extern int threaded_has_symlink_leading_path(struct cache_def *, const char *, int);
-extern int has_symlink_or_noent_leading_path(const char *name, int len);
+extern int check_leading_path(const char *name, int len);
extern int has_dirs_only_path(const char *name, int len, int prefix_len);
extern void schedule_dir_for_removal(const char *name, int len);
extern void remove_scheduled_dirs(void);
diff --git a/symlinks.c b/symlinks.c
index b7343eb..3cacebd 100644
--- a/symlinks.c
+++ b/symlinks.c
@@ -209,15 +209,26 @@ int has_symlink_leading_path(const char *name, int len)
}
/*
- * Return non-zero if path 'name' has a leading symlink component or
+ * Return zero if path 'name' has a leading symlink component or
* if some leading path component does not exists.
+ *
+ * Return -1 if leading path exists and is a directory.
+ *
+ * Return path length if leading path exists and is neither a
+ * directory nor a symlink.
*/
-int has_symlink_or_noent_leading_path(const char *name, int len)
+int check_leading_path(const char *name, int len)
{
struct cache_def *cache = &default_cache; /* FIXME */
- return lstat_cache(cache, name, len,
- FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT) &
- (FL_SYMLINK|FL_NOENT);
+ int flags;
+ int match_len = lstat_cache_matchlen(cache, name, len, &flags,
+ FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT);
+ if (flags & (FL_SYMLINK|FL_NOENT))
+ return 0;
+ else if (flags & FL_DIR)
+ return -1;
+ else
+ return match_len;
}
/*
diff --git a/t/t7607-merge-overwrite.sh b/t/t7607-merge-overwrite.sh
index 01b070b..412db15 100755
--- a/t/t7607-merge-overwrite.sh
+++ b/t/t7607-merge-overwrite.sh
@@ -100,7 +100,7 @@ test_expect_success 'will not overwrite untracked subtree' '
test_cmp important sub/f/important
'
-test_expect_failure 'will not overwrite untracked file in leading path' '
+test_expect_success 'will not overwrite untracked file in leading path' '
git reset --hard c0 &&
rm -rf sub &&
cp important sub &&
diff --git a/unpack-trees.c b/unpack-trees.c
index df1c920..6816113 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -182,7 +182,7 @@ static void display_error_msgs(struct unpack_trees_options *o)
*/
static void unlink_entry(struct cache_entry *ce)
{
- if (has_symlink_or_noent_leading_path(ce->name, ce_namelen(ce)))
+ if (!check_leading_path(ce->name, ce_namelen(ce)))
return;
if (remove_or_warn(ce->ce_mode, ce->name))
return;
@@ -1194,18 +1194,28 @@ static int verify_absent_1(struct cache_entry *ce,
enum unpack_trees_error_types error_type,
struct unpack_trees_options *o)
{
+ int len;
struct stat st;
if (o->index_only || o->reset || !o->update)
return 0;
- if (has_symlink_or_noent_leading_path(ce->name, ce_namelen(ce)))
+ len = check_leading_path(ce->name, ce_namelen(ce));
+ if (!len)
return 0;
+ else if (len > 0) {
+ char path[PATH_MAX + 1];
+ memcpy(path, ce->name, len);
+ path[len] = 0;
+ lstat(path, &st);
- if (!lstat(ce->name, &st))
+ return check_ok_to_remove(path, len, DT_UNKNOWN, NULL, &st,
+ error_type, o);
+ } else if (!lstat(ce->name, &st))
return check_ok_to_remove(ce->name, ce_namelen(ce),
ce_to_dtype(ce), ce, &st,
error_type, o);
+
return 0;
}
--
1.7.1.571.gba4d01
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