[PATCH 06/20] untracked cache: initial untracked cache validation
---
dir.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
dir.h | 3 ++
2 files changed, 115 insertions(+), 3 deletions(-)
diff --git a/dir.c b/dir.c
index 34a10b2..a198aa8 100644
--- a/dir.c
+++ b/dir.c
@@ -568,6 +568,22 @@ static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
return d;
}
+static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
+{
+ int i;
+ dir->valid = 0;
+ dir->untracked_nr = 0;
+ for (i = 0; i < dir->dirs_nr; i++)
+ do_invalidate_gitignore(dir->dirs[i]);
+}
+
+static void invalidate_gitignore(struct untracked_cache *uc,
+ struct untracked_cache_dir *dir)
+{
+ uc->gitignore_invalidated++;
+ do_invalidate_gitignore(dir);
+}
+
static int add_excludes(const char *fname,
const char *base,
int baselen,
@@ -685,6 +701,13 @@ void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
const unsigned char *ref_sha1)
{
struct exclude_list *el;
+ /*
+ * catch setup_standard_excludes() that's called before
+ * dir->untracked is assigned. That function behaves
+ * differently when dir->untracked is non-NULL.
+ */
+ if (!dir->untracked)
+ dir->unmanaged_exclude_files++;
el = add_exclude_list(dir, EXC_FILE, fname);
if (add_excludes(fname, "", 0, el, 0, sha1, ref_stat, ref_sha1) < 0)
die("cannot use %s as an exclude file", fname);
@@ -692,6 +715,7 @@ void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
void add_excludes_from_file(struct dir_struct *dir, const char *fname)
{
+ dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
add_excludes_from_file_1(dir, fname, NULL, NULL, NULL);
}
@@ -1570,9 +1594,89 @@ static int treat_leading_path(struct dir_struct *dir,
return rc;
}
+static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
+ int base_len,
+ const struct pathspec *pathspec)
+{
+ struct untracked_cache_dir *root;
+
+ if (!dir->untracked)
+ return NULL;
+
+ /*
+ * We only support $GIT_DIR/info/exclude and core.excludesfile
+ * as the global ignore rule files. Any other additions
+ * (e.g. from command line) invalidate the cache. This
+ * condition also catches running setup_standard_excludes()
+ * before setting dir->untracked!
+ */
+ if (dir->unmanaged_exclude_files)
+ return NULL;
+
+ /*
+ * Optimize for the main use case only: whole-tree git
+ * status. More work involved in treat_leading_path() if we
+ * use cache on just a subset of the worktree. pathspec
+ * support could make the matter even worse.
+ */
+ if (base_len || (pathspec && pathspec->nr))
+ return NULL;
+
+ /* Different set of flags may produce different results */
+ if (dir->flags != dir->untracked->dir_flags ||
+ /*
+ * See treat_directory(), case index_nonexistent. Without
+ * this flag, we may need to also cache .git file content
+ * for the resolve_gitlink_ref() call, which we don't.
+ */
+ !(dir->flags & DIR_SHOW_OTHER_DIRECTORIES) ||
+ /* We don't support collecting ignore files */
+ (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
+ DIR_COLLECT_IGNORED)))
+ return NULL;
+
+ /*
+ * If we use .gitignore in the cache and now you change it to
+ * .gitexclude, everything will go wrong.
+ */
+ if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
+ strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
+ return NULL;
+
+ /*
+ * EXC_CMDL is not considered in the cache. If people set it,
+ * skip the cache.
+ */
+ if (dir->exclude_list_group[EXC_CMDL].nr)
+ return NULL;
+
+ if (!dir->untracked->root) {
+ const int len = sizeof(*dir->untracked->root);
+ dir->untracked->root = xmalloc(len);
+ memset(dir->untracked->root, 0, len);
+ }
+
+ /* Validate $GIT_DIR/info/exclude and core.excludesfile */
+ root = dir->untracked->root;
+ if (hashcmp(dir->info_exclude_sha1,
+ dir->untracked->info_exclude_sha1)) {
+ invalidate_gitignore(dir->untracked, root);
+ hashcpy(dir->untracked->info_exclude_sha1,
+ dir->info_exclude_sha1);
+ }
+ if (hashcmp(dir->excludes_file_sha1,
+ dir->untracked->excludes_file_sha1)) {
+ invalidate_gitignore(dir->untracked, root);
+ hashcpy(dir->untracked->excludes_file_sha1,
+ dir->excludes_file_sha1);
+ }
+ return root;
+}
+
int read_directory(struct dir_struct *dir, const char *path, int len, const struct pathspec *pathspec)
{
struct path_simplify *simplify;
+ struct untracked_cache_dir *untracked;
/*
* Check out create_simplify()
@@ -1596,10 +1700,15 @@ int read_directory(struct dir_struct *dir, const char *path, int len, const stru
* create_simplify().
*/
simplify = create_simplify(pathspec ? pathspec->_raw : NULL);
+ untracked = validate_untracked_cache(dir, len, pathspec);
+ if (!untracked)
+ /*
+ * make sure untracked cache code path is disabled,
+ * e.g. prep_exclude()
+ */
+ dir->untracked = NULL;
if (!len || treat_leading_path(dir, path, len, simplify))
- read_directory_recursive(dir, path, len,
- dir->untracked ? dir->untracked->root : NULL,
- 0, simplify);
+ read_directory_recursive(dir, path, len, untracked, 0, simplify);
free_simplify(simplify);
qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);
qsort(dir->ignored, dir->ignored_nr, sizeof(struct dir_entry *), cmp_name);
diff --git a/dir.h b/dir.h
index bce7055..ded251e 100644
--- a/dir.h
+++ b/dir.h
@@ -109,6 +109,7 @@ struct untracked_cache_dir {
unsigned char exclude_sha1[20];
struct stat_data stat_data;
unsigned int check_only : 1;
+ unsigned int valid : 1;
unsigned int untracked_nr : 29;
unsigned int untracked_alloc, dirs_nr, dirs_alloc;
char name[1];
@@ -128,6 +129,7 @@ struct untracked_cache {
struct untracked_cache_dir *root;
/* Statistics */
int dir_created;
+ int gitignore_invalidated;
};
struct dir_struct {
@@ -180,6 +182,7 @@ struct dir_struct {
/* Enable untracked file cache if set */
struct untracked_cache *untracked;
+ unsigned unmanaged_exclude_files;
struct stat_data info_exclude_stat;
struct stat_data excludes_file_stat;
unsigned char info_exclude_sha1[20];
--
1.9.1.346.ga2b5940
Nguyễn Thái Ngọc Duy <pclouds@gmail.com>