git/dir.h

#ifndef DIR_H
#define DIR_H

#include "hash.h"
#include "hashmap.h"
#include "pathspec.h"
#include "statinfo.h"
#include "strbuf.h"

struct repository;

/**
 * The directory listing API is used to enumerate paths in the work tree,
 * optionally taking `.git/info/exclude` and `.gitignore` files per directory
 * into account.
 */

/**
 * Calling sequence
 * ----------------
 *
 * Note: The index may be checked for .gitignore files that are
 * CE_SKIP_WORKTREE marked. If you want to exclude files, make sure you have
 * loaded the index first.
 *
 * - Prepare `struct dir_struct dir` using `dir_init()` function.
 *
 * - To add single exclude pattern, call `add_pattern_list()` and then
 *   `add_pattern()`.
 *
 * - To add patterns from a file (e.g. `.git/info/exclude`), call
 *   `add_patterns_from_file()` , and/or set `dir.exclude_per_dir`.
 *
 * - A short-hand function `setup_standard_excludes()` can be used to set
 *   up the standard set of exclude settings, instead of manually calling
 *   the add_pattern*() family of functions.
 *
 * - Call `fill_directory()`.
 *
 * - Use `dir.entries[]` and `dir.ignored[]`.
 *
 * - Call `dir_clear()` when the contained elements are no longer in use.
 *
 */

struct repository;

struct dir_entry { … };

#define PATTERN_FLAG_NODIR …
#define PATTERN_FLAG_ENDSWITH …
#define PATTERN_FLAG_MUSTBEDIR …
#define PATTERN_FLAG_NEGATIVE …

struct path_pattern { … };

/* used for hashmaps for cone patterns */
struct pattern_entry { … };

/*
 * 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 pattern_list { … };

/*
 * 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_list_group { … };

struct oid_stat { … };

/*
 *  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 { … };

/**
 * structure is used to pass directory traversal options to the library and to
 * record the paths discovered. A single `struct dir_struct` is used regardless
 * of whether or not the traversal recursively descends into subdirectories.
 */
struct dir_struct { … };

#define DIR_INIT …

struct dirent *readdir_skip_dot_and_dotdot(DIR *dirp);

/*
 * Get the d_type of a dirent. If the d_type is unknown, derive it from
 * stat.st_mode using the path to the dirent's containing directory (path) and
 * the name of the dirent itself.
 *
 * If 'follow_symlink' is 1, this function will attempt to follow DT_LNK types
 * using 'stat'. Links are *not* followed recursively, so a symlink pointing
 * to another symlink will still resolve to 'DT_LNK'.
 *
 * Note that 'path' is assumed to have a trailing slash. It is also modified
 * in-place during the execution of the function, but is then reverted to its
 * original value before returning.
 */
unsigned char get_dtype(struct dirent *e, struct strbuf *path,
			int follow_symlink);

/*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 …
#define MATCHED_RECURSIVELY_LEADING_PATHSPEC …
#define MATCHED_FNMATCH …
#define MATCHED_EXACTLY …
int simple_length(const char *match);
int no_wildcard(const char *string);
char *common_prefix(const struct pathspec *pathspec);
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);

enum pattern_match_result { … };

/*
 * Scan the list of patterns to determine if the ordered list
 * of patterns matches on 'pathname'.
 *
 * Return 1 for a match, 0 for not matched and -1 for undecided.
 */
enum pattern_match_result path_matches_pattern_list(const char *pathname,
				int pathlen,
				const char *basename, int *dtype,
				struct pattern_list *pl,
				struct index_state *istate);

int init_sparse_checkout_patterns(struct index_state *state);

int path_in_sparse_checkout(const char *path,
			    struct index_state *istate);
int path_in_cone_mode_sparse_checkout(const char *path,
				      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);

struct path_pattern *last_matching_pattern(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);

int pl_hashmap_cmp(const void *unused_cmp_data,
		   const struct hashmap_entry *a,
		   const struct hashmap_entry *b,
		   const void *key);
int hashmap_contains_parent(struct hashmap *map,
			    const char *path,
			    struct strbuf *buffer);
struct pattern_list *add_pattern_list(struct dir_struct *dir,
				      int group_type, const char *src);
int add_patterns_from_file_to_list(const char *fname, const char *base, int baselen,
				   struct pattern_list *pl, struct index_state *istate,
				   unsigned flags);
void add_patterns_from_file(struct dir_struct *, const char *fname);
int add_patterns_from_blob_to_list(struct object_id *oid,
				   const char *base, int baselen,
				   struct pattern_list *pl);
void parse_path_pattern(const char **string, int *patternlen, unsigned *flags, int *nowildcardlen);
void add_pattern(const char *string, const char *base,
		 int baselen, struct pattern_list *pl, int srcpos);
void clear_pattern_list(struct pattern_list *pl);
void dir_clear(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)
{ … }

int is_empty_dir(const char *dir);

/*
 * Retrieve the "humanish" basename of the given Git URL.
 *
 * For example:
 * 	/path/to/repo.git => "repo"
 * 	host.xz:foo/.git => "foo"
 * 	http://example.com/user/bar.baz => "bar.baz"
 */
char *git_url_basename(const char *repo, int is_bundle, int is_bare);
void strip_dir_trailing_slashes(char *dir);

void setup_standard_excludes(struct dir_struct *dir);

char *get_sparse_checkout_filename(void);
int get_sparse_checkout_patterns(struct pattern_list *pl);

/* 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 …

/*
 * If any Git work trees are found within path, skip them without
 * considering it an error.
 */
#define REMOVE_DIR_KEEP_NESTED_GIT …

/* Remove the contents of path, but leave path itself. */
#define REMOVE_DIR_KEEP_TOPLEVEL …

/* Remove the_original_cwd too */
#define REMOVE_DIR_PURGE_ORIGINAL_CWD …

/*
 * 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, along with leading empty directories so long as
 * those empty directories are not startup_info->original_cwd.  Ignores
 * ENOENT.
 */
int remove_path(const char *path);

int git_fspathcmp(const char *a, const char *b);
int fspatheq(const char *a, const char *b);
int git_fspathncmp(const char *a, const char *b, size_t count);
unsigned int fspathhash(const char *str);

/*
 * Reports whether paths collide. This may be because the paths differ only in
 * case on a case-sensitive filesystem, or that one path refers to a symlink
 * that collides with one of the parent directories of the other.
 */
int paths_collide(const char *a, const char *b);

/*
 * 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(struct index_state *istate,
			 const struct pathspec *ps,
			 const char *submodule_name,
			 char *seen);

static inline int dir_path_match(struct index_state *istate,
				 const struct dir_entry *ent,
				 const struct pathspec *pathspec,
				 int prefix, char *seen)
{ … }

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);
/*
 * Invalidate the untracked-cache for this path, but first strip
 * off a trailing slash, if present.
 */
void untracked_cache_invalidate_trimmed_path(struct index_state *,
					     const char *path,
					     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);

/**
 * The "enum path_matches_kind" determines how path_match_flags() will
 * behave. The flags come in sets, and one (and only one) must be
 * provided out of each "set":
 *
 * PATH_MATCH_NATIVE:
 *	Path separator is is_dir_sep()
 * PATH_MATCH_XPLATFORM:
 *	Path separator is is_xplatform_dir_sep()
 *
 * Do we use is_dir_sep() to check for a directory separator
 * (*_NATIVE), or do we always check for '/' or '\' (*_XPLATFORM). The
 * "*_NATIVE" version on Windows is the same as "*_XPLATFORM",
 * everywhere else "*_NATIVE" means "only /".
 *
 * PATH_MATCH_STARTS_WITH_DOT_SLASH:
 *	Match a path starting with "./"
 * PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH:
 *	Match a path starting with "../"
 *
 * The "/" in the above is adjusted based on the "*_NATIVE" and
 * "*_XPLATFORM" flags.
 */
enum path_match_flags { … };
#define PATH_MATCH_KINDS_MASK …
#define PATH_MATCH_PLATFORM_MASK …

/**
 * path_match_flags() checks if a given "path" matches a given "enum
 * path_match_flags" criteria.
 */
int path_match_flags(const char *const path, const enum path_match_flags f);

/**
 * starts_with_dot_slash_native(): convenience wrapper for
 * path_match_flags() with PATH_MATCH_STARTS_WITH_DOT_SLASH and
 * PATH_MATCH_NATIVE.
 */
static inline int starts_with_dot_slash_native(const char *const path)
{ … }

/**
 * starts_with_dot_slash_native(): convenience wrapper for
 * path_match_flags() with PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH and
 * PATH_MATCH_NATIVE.
 */
static inline int starts_with_dot_dot_slash_native(const char *const path)
{ … }

#endif