1 files changed, 383 insertions, 0 deletions
diff --git a/third_party/git/dir.h b/third_party/git/dir.h
new file mode 100644
index 0000000000..680079bbe3
--- /dev/null
+++ b/third_party/git/dir.h
@@ -0,0 +1,383 @@
+#ifndef DIR_H
+#define DIR_H
+
+/* See Documentation/technical/api-directory-listing.txt */
+
+#include "cache.h"
+#include "strbuf.h"
+
+struct dir_entry {
+	unsigned int len;
+	char name[FLEX_ARRAY]; /* more */
+};
+
+#define EXC_FLAG_NODIR 1
+#define EXC_FLAG_ENDSWITH 4
+#define EXC_FLAG_MUSTBEDIR 8
+#define EXC_FLAG_NEGATIVE 16
+
+struct exclude {
+	/*
+	 * This allows callers of last_exclude_matching() etc.
+	 * to determine the origin of the matching pattern.
+	 */
+	struct exclude_list *el;
+
+	const char *pattern;
+	int patternlen;
+	int nowildcardlen;
+	const char *base;
+	int baselen;
+	unsigned flags;		/* EXC_FLAG_* */
+
+	/*
+	 * Counting starts from 1 for line numbers in ignore files,
+	 * and from -1 decrementing for patterns from CLI args.
+	 */
+	int srcpos;
+};
+
+/*
+ * Each excludes file will be parsed into a fresh exclude_list which
+ * is appended to the relevant exclude_list_group (either EXC_DIRS or
+ * EXC_FILE).  An exclude_list within the EXC_CMDL exclude_list_group
+ * can also be used to represent the list of --exclude values passed
+ * via CLI args.
+ */
+struct exclude_list {
+	int nr;
+	int alloc;
+
+	/* remember pointer to exclude file contents so we can free() */
+	char *filebuf;
+
+	/* origin of list, e.g. path to filename, or descriptive string */
+	const char *src;
+
+	struct exclude **excludes;
+};
+
+/*
+ * The contents of the per-directory exclude files are lazily read on
+ * demand and then cached in memory, one per exclude_stack struct, in
+ * order to avoid opening and parsing each one every time that
+ * directory is traversed.
+ */
+struct exclude_stack {
+	struct exclude_stack *prev; /* the struct exclude_stack for the parent directory */
+	int baselen;
+	int exclude_ix; /* index of exclude_list within EXC_DIRS exclude_list_group */
+	struct untracked_cache_dir *ucd;
+};
+
+struct exclude_list_group {
+	int nr, alloc;
+	struct exclude_list *el;
+};
+
+struct oid_stat {
+	struct stat_data stat;
+	struct object_id oid;
+	int valid;
+};
+
+/*
+ *  Untracked cache
+ *
+ *  The following inputs are sufficient to determine what files in a
+ *  directory are excluded:
+ *
+ *   - The list of files and directories of the directory in question
+ *   - The $GIT_DIR/index
+ *   - dir_struct flags
+ *   - The content of $GIT_DIR/info/exclude
+ *   - The content of core.excludesfile
+ *   - The content (or the lack) of .gitignore of all parent directories
+ *     from $GIT_WORK_TREE
+ *   - The check_only flag in read_directory_recursive (for
+ *     DIR_HIDE_EMPTY_DIRECTORIES)
+ *
+ *  The first input can be checked using directory mtime. In many
+ *  filesystems, directory mtime (stat_data field) is updated when its
+ *  files or direct subdirs are added or removed.
+ *
+ *  The second one can be hooked from cache_tree_invalidate_path().
+ *  Whenever a file (or a submodule) is added or removed from a
+ *  directory, we invalidate that directory.
+ *
+ *  The remaining inputs are easy, their SHA-1 could be used to verify
+ *  their contents (exclude_sha1[], info_exclude_sha1[] and
+ *  excludes_file_sha1[])
+ */
+struct untracked_cache_dir {
+	struct untracked_cache_dir **dirs;
+	char **untracked;
+	struct stat_data stat_data;
+	unsigned int untracked_alloc, dirs_nr, dirs_alloc;
+	unsigned int untracked_nr;
+	unsigned int check_only : 1;
+	/* all data except 'dirs' in this struct are good */
+	unsigned int valid : 1;
+	unsigned int recurse : 1;
+	/* null object ID means this directory does not have .gitignore */
+	struct object_id exclude_oid;
+	char name[FLEX_ARRAY];
+};
+
+struct untracked_cache {
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
+	const char *exclude_per_dir;
+	struct strbuf ident;
+	/*
+	 * dir_struct#flags must match dir_flags or the untracked
+	 * cache is ignored.
+	 */
+	unsigned dir_flags;
+	struct untracked_cache_dir *root;
+	/* Statistics */
+	int dir_created;
+	int gitignore_invalidated;
+	int dir_invalidated;
+	int dir_opened;
+	/* fsmonitor invalidation data */
+	unsigned int use_fsmonitor : 1;
+};
+
+struct dir_struct {
+	int nr, alloc;
+	int ignored_nr, ignored_alloc;
+	enum {
+		DIR_SHOW_IGNORED = 1<<0,
+		DIR_SHOW_OTHER_DIRECTORIES = 1<<1,
+		DIR_HIDE_EMPTY_DIRECTORIES = 1<<2,
+		DIR_NO_GITLINKS = 1<<3,
+		DIR_COLLECT_IGNORED = 1<<4,
+		DIR_SHOW_IGNORED_TOO = 1<<5,
+		DIR_COLLECT_KILLED_ONLY = 1<<6,
+		DIR_KEEP_UNTRACKED_CONTENTS = 1<<7,
+		DIR_SHOW_IGNORED_TOO_MODE_MATCHING = 1<<8
+	} flags;
+	struct dir_entry **entries;
+	struct dir_entry **ignored;
+
+	/* Exclude info */
+	const char *exclude_per_dir;
+
+	/*
+	 * We maintain three groups of exclude pattern lists:
+	 *
+	 * EXC_CMDL lists patterns explicitly given on the command line.
+	 * EXC_DIRS lists patterns obtained from per-directory ignore files.
+	 * EXC_FILE lists patterns from fallback ignore files, e.g.
+	 *   - .git/info/exclude
+	 *   - core.excludesfile
+	 *
+	 * Each group contains multiple exclude lists, a single list
+	 * per source.
+	 */
+#define EXC_CMDL 0
+#define EXC_DIRS 1
+#define EXC_FILE 2
+	struct exclude_list_group exclude_list_group[3];
+
+	/*
+	 * Temporary variables which are used during loading of the
+	 * per-directory exclude lists.
+	 *
+	 * exclude_stack points to the top of the exclude_stack, and
+	 * basebuf contains the full path to the current
+	 * (sub)directory in the traversal. Exclude points to the
+	 * matching exclude struct if the directory is excluded.
+	 */
+	struct exclude_stack *exclude_stack;
+	struct exclude *exclude;
+	struct strbuf basebuf;
+
+	/* Enable untracked file cache if set */
+	struct untracked_cache *untracked;
+	struct oid_stat ss_info_exclude;
+	struct oid_stat ss_excludes_file;
+	unsigned unmanaged_exclude_files;
+};
+
+/*Count the number of slashes for string s*/
+int count_slashes(const char *s);
+
+/*
+ * The ordering of these constants is significant, with
+ * higher-numbered match types signifying "closer" (i.e. more
+ * specific) matches which will override lower-numbered match types
+ * when populating the seen[] array.
+ */
+#define MATCHED_RECURSIVELY 1
+#define MATCHED_FNMATCH 2
+#define MATCHED_EXACTLY 3
+int simple_length(const char *match);
+int no_wildcard(const char *string);
+char *common_prefix(const struct pathspec *pathspec);
+int match_pathspec(const struct index_state *istate,
+		   const struct pathspec *pathspec,
+		   const char *name, int namelen,
+		   int prefix, char *seen, int is_dir);
+int report_path_error(const char *ps_matched, const struct pathspec *pathspec);
+int within_depth(const char *name, int namelen, int depth, int max_depth);
+
+int fill_directory(struct dir_struct *dir,
+		   struct index_state *istate,
+		   const struct pathspec *pathspec);
+int read_directory(struct dir_struct *, struct index_state *istate,
+		   const char *path, int len,
+		   const struct pathspec *pathspec);
+
+int is_excluded_from_list(const char *pathname, int pathlen,
+			  const char *basename, int *dtype,
+			  struct exclude_list *el,
+			  struct index_state *istate);
+struct dir_entry *dir_add_ignored(struct dir_struct *dir,
+				  struct index_state *istate,
+				  const char *pathname, int len);
+
+/*
+ * these implement the matching logic for dir.c:excluded_from_list and
+ * attr.c:path_matches()
+ */
+int match_basename(const char *, int,
+		   const char *, int, int, unsigned);
+int match_pathname(const char *, int,
+		   const char *, int,
+		   const char *, int, int, unsigned);
+
+struct exclude *last_exclude_matching(struct dir_struct *dir,
+				      struct index_state *istate,
+				      const char *name, int *dtype);
+
+int is_excluded(struct dir_struct *dir,
+		struct index_state *istate,
+		const char *name, int *dtype);
+
+struct exclude_list *add_exclude_list(struct dir_struct *dir,
+				      int group_type, const char *src);
+int add_excludes_from_file_to_list(const char *fname, const char *base, int baselen,
+				   struct exclude_list *el, struct  index_state *istate);
+void add_excludes_from_file(struct dir_struct *, const char *fname);
+int add_excludes_from_blob_to_list(struct object_id *oid,
+				   const char *base, int baselen,
+				   struct exclude_list *el);
+void parse_exclude_pattern(const char **string, int *patternlen, unsigned *flags, int *nowildcardlen);
+void add_exclude(const char *string, const char *base,
+		 int baselen, struct exclude_list *el, int srcpos);
+void clear_exclude_list(struct exclude_list *el);
+void clear_directory(struct dir_struct *dir);
+
+int repo_file_exists(struct repository *repo, const char *path);
+int file_exists(const char *);
+
+int is_inside_dir(const char *dir);
+int dir_inside_of(const char *subdir, const char *dir);
+
+static inline int is_dot_or_dotdot(const char *name)
+{
+	return (name[0] == '.' &&
+		(name[1] == '\0' ||
+		 (name[1] == '.' && name[2] == '\0')));
+}
+
+int is_empty_dir(const char *dir);
+
+void setup_standard_excludes(struct dir_struct *dir);
+
+
+/* Constants for remove_dir_recursively: */
+
+/*
+ * If a non-directory is found within path, stop and return an error.
+ * (In this case some empty directories might already have been
+ * removed.)
+ */
+#define REMOVE_DIR_EMPTY_ONLY 01
+
+/*
+ * If any Git work trees are found within path, skip them without
+ * considering it an error.
+ */
+#define REMOVE_DIR_KEEP_NESTED_GIT 02
+
+/* Remove the contents of path, but leave path itself. */
+#define REMOVE_DIR_KEEP_TOPLEVEL 04
+
+/*
+ * Remove path and its contents, recursively. flags is a combination
+ * of the above REMOVE_DIR_* constants. Return 0 on success.
+ *
+ * This function uses path as temporary scratch space, but restores it
+ * before returning.
+ */
+int remove_dir_recursively(struct strbuf *path, int flag);
+
+/* tries to remove the path with empty directories along it, ignores ENOENT */
+int remove_path(const char *path);
+
+int fspathcmp(const char *a, const char *b);
+int fspathncmp(const char *a, const char *b, size_t count);
+
+/*
+ * The prefix part of pattern must not contains wildcards.
+ */
+struct pathspec_item;
+int git_fnmatch(const struct pathspec_item *item,
+		const char *pattern, const char *string,
+		int prefix);
+
+int submodule_path_match(const struct index_state *istate,
+			 const struct pathspec *ps,
+			 const char *submodule_name,
+			 char *seen);
+
+static inline int ce_path_match(const struct index_state *istate,
+				const struct cache_entry *ce,
+				const struct pathspec *pathspec,
+				char *seen)
+{
+	return match_pathspec(istate, pathspec, ce->name, ce_namelen(ce), 0, seen,
+			      S_ISDIR(ce->ce_mode) || S_ISGITLINK(ce->ce_mode));
+}
+
+static inline int dir_path_match(const struct index_state *istate,
+				 const struct dir_entry *ent,
+				 const struct pathspec *pathspec,
+				 int prefix, char *seen)
+{
+	int has_trailing_dir = ent->len && ent->name[ent->len - 1] == '/';
+	int len = has_trailing_dir ? ent->len - 1 : ent->len;
+	return match_pathspec(istate, pathspec, ent->name, len, prefix, seen,
+			      has_trailing_dir);
+}
+
+int cmp_dir_entry(const void *p1, const void *p2);
+int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in);
+
+void untracked_cache_invalidate_path(struct index_state *, const char *, int safe_path);
+void untracked_cache_remove_from_index(struct index_state *, const char *);
+void untracked_cache_add_to_index(struct index_state *, const char *);
+
+void free_untracked_cache(struct untracked_cache *);
+struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz);
+void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked);
+void add_untracked_cache(struct index_state *istate);
+void remove_untracked_cache(struct index_state *istate);
+
+/*
+ * Connect a worktree to a git directory by creating (or overwriting) a
+ * '.git' file containing the location of the git directory. In the git
+ * directory set the core.worktree setting to indicate where the worktree is.
+ * When `recurse_into_nested` is set, recurse into any nested submodules,
+ * connecting them as well.
+ */
+void connect_work_tree_and_git_dir(const char *work_tree,
+				   const char *git_dir,
+				   int recurse_into_nested);
+void relocate_gitdir(const char *path,
+		     const char *old_git_dir,
+		     const char *new_git_dir);
+#endif