Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 644 insertions, 0 deletions

diff --git a/dir.h b/dir.h
new file mode 100644
index 0000000..674747d
--- /dev/null
+++ b/dir.h
@@ -0,0 +1,644 @@
+#ifndef DIR_H
+#define DIR_H
+
+#include "cache.h"
+#include "hashmap.h"
+#include "strbuf.h"
+
+/**
+ * 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 dir_entry {
+	unsigned int len;
+	char name[FLEX_ARRAY]; /* more */
+};
+
+#define PATTERN_FLAG_NODIR 1
+#define PATTERN_FLAG_ENDSWITH 4
+#define PATTERN_FLAG_MUSTBEDIR 8
+#define PATTERN_FLAG_NEGATIVE 16
+
+struct path_pattern {
+	/*
+	 * This allows callers of last_matching_pattern() etc.
+	 * to determine the origin of the matching pattern.
+	 */
+	struct pattern_list *pl;
+
+	const char *pattern;
+	int patternlen;
+	int nowildcardlen;
+	const char *base;
+	int baselen;
+	unsigned flags;		/* PATTERN_FLAG_* */
+
+	/*
+	 * Counting starts from 1 for line numbers in ignore files,
+	 * and from -1 decrementing for patterns from CLI args.
+	 */
+	int srcpos;
+};
+
+/* used for hashmaps for cone patterns */
+struct pattern_entry {
+	struct hashmap_entry ent;
+	char *pattern;
+	size_t patternlen;
+};
+
+/*
+ * 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 {
+	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 path_pattern **patterns;
+
+	/*
+	 * While scanning the excludes, we attempt to match the patterns
+	 * with a more restricted set that allows us to use hashsets for
+	 * matching logic, which is faster than the linear lookup in the
+	 * excludes array above. If non-zero, that check succeeded.
+	 */
+	unsigned use_cone_patterns;
+	unsigned full_cone;
+
+	/*
+	 * Stores paths where everything starting with those paths
+	 * is included.
+	 */
+	struct hashmap recursive_hashmap;
+
+	/*
+	 * Used to check single-level parents of blobs.
+	 */
+	struct hashmap parent_hashmap;
+};
+
+/*
+ * 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 pattern_list *pl;
+};
+
+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;
+};
+
+/**
+ * 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 {
+
+	/* The number of members in `entries[]` array. */
+	int nr;
+
+	/* Internal use; keeps track of allocation of `entries[]` array.*/
+	int alloc;
+
+	/* The number of members in `ignored[]` array. */
+	int ignored_nr;
+
+	int ignored_alloc;
+
+	/* bit-field of options */
+	enum {
+
+		/**
+		 * Return just ignored files in `entries[]`, not untracked files.
+		 * This flag is mutually exclusive with `DIR_SHOW_IGNORED_TOO`.
+		 */
+		DIR_SHOW_IGNORED = 1<<0,
+
+		/* Include a directory that is not tracked. */
+		DIR_SHOW_OTHER_DIRECTORIES = 1<<1,
+
+		/* Do not include a directory that is not tracked and is empty. */
+		DIR_HIDE_EMPTY_DIRECTORIES = 1<<2,
+
+		/**
+		 * If set, recurse into a directory that looks like a Git directory.
+		 * Otherwise it is shown as a directory.
+		 */
+		DIR_NO_GITLINKS = 1<<3,
+
+		/**
+		 * Special mode for git-add. Return ignored files in `ignored[]` and
+		 * untracked files in `entries[]`. Only returns ignored files that match
+		 * pathspec exactly (no wildcards). Does not recurse into ignored
+		 * directories.
+		 */
+		DIR_COLLECT_IGNORED = 1<<4,
+
+		/**
+		 * Similar to `DIR_SHOW_IGNORED`, but return ignored files in
+		 * `ignored[]` in addition to untracked files in `entries[]`.
+		 * This flag is mutually exclusive with `DIR_SHOW_IGNORED`.
+		 */
+		DIR_SHOW_IGNORED_TOO = 1<<5,
+
+		DIR_COLLECT_KILLED_ONLY = 1<<6,
+
+		/**
+		 * Only has meaning if `DIR_SHOW_IGNORED_TOO` is also set; if this is
+		 * set, the untracked contents of untracked directories are also
+		 * returned in `entries[]`.
+		 */
+		DIR_KEEP_UNTRACKED_CONTENTS = 1<<7,
+
+		/**
+		 * Only has meaning if `DIR_SHOW_IGNORED_TOO` is also set; if this is
+		 * set, returns ignored files and directories that match an exclude
+		 * pattern. If a directory matches an exclude pattern, then the
+		 * directory is returned and the contained paths are not. A directory
+		 * that does not match an exclude pattern will not be returned even if
+		 * all of its contents are ignored. In this case, the contents are
+		 * returned as individual entries.
+		 *
+		 * If this is set, files and directories that explicitly match an ignore
+		 * pattern are reported. Implicitly ignored directories (directories that
+		 * do not match an ignore pattern, but whose contents are all ignored)
+		 * are not reported, instead all of the contents are reported.
+		 */
+		DIR_SHOW_IGNORED_TOO_MODE_MATCHING = 1<<8,
+
+		DIR_SKIP_NESTED_GIT = 1<<9
+	} flags;
+
+	/* An array of `struct dir_entry`, each element of which describes a path. */
+	struct dir_entry **entries;
+
+	/**
+	 * used for ignored paths with the `DIR_SHOW_IGNORED_TOO` and
+	 * `DIR_COLLECT_IGNORED` flags.
+	 */
+	struct dir_entry **ignored;
+
+	/**
+	 * The name of the file to be read in each directory for excluded files
+	 * (typically `.gitignore`).
+	 */
+	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 path_pattern *pattern;
+	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;
+
+	/* Stats about the traversal */
+	unsigned visited_paths;
+	unsigned visited_directories;
+};
+
+#define DIR_INIT { 0 }
+
+struct dirent *readdir_skip_dot_and_dotdot(DIR *dirp);
+
+/*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_RECURSIVELY_LEADING_PATHSPEC 2
+#define MATCHED_FNMATCH 3
+#define MATCHED_EXACTLY 4
+int simple_length(const char *match);
+int no_wildcard(const char *string);
+char *common_prefix(const struct pathspec *pathspec);
+int match_pathspec(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);
+
+enum pattern_match_result {
+	UNDECIDED = -1,
+	NOT_MATCHED = 0,
+	MATCHED = 1,
+	MATCHED_RECURSIVE = 2,
+};
+
+/*
+ * 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)
+{
+	return (name[0] == '.' &&
+		(name[1] == '\0' ||
+		 (name[1] == '.' && name[2] == '\0')));
+}
+
+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 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 the_original_cwd too */
+#define REMOVE_DIR_PURGE_ORIGINAL_CWD 0x08
+
+/*
+ * 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 fspathcmp(const char *a, const char *b);
+int fspatheq(const char *a, const char *b);
+int fspathncmp(const char *a, const char *b, size_t count);
+unsigned int fspathhash(const char *str);
+
+/*
+ * 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 ce_path_match(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(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);
+
+/**
+ * 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 {
+	PATH_MATCH_NATIVE = 1 << 0,
+	PATH_MATCH_XPLATFORM = 1 << 1,
+	PATH_MATCH_STARTS_WITH_DOT_SLASH = 1 << 2,
+	PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH = 1 << 3,
+};
+#define PATH_MATCH_KINDS_MASK (PATH_MATCH_STARTS_WITH_DOT_SLASH | \
+	PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH)
+#define PATH_MATCH_PLATFORM_MASK (PATH_MATCH_NATIVE | PATH_MATCH_XPLATFORM)
+
+/**
+ * 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)
+{
+	const enum path_match_flags what = PATH_MATCH_STARTS_WITH_DOT_SLASH;
+
+	return path_match_flags(path, what | PATH_MATCH_NATIVE);
+}
+
+/**
+ * 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)
+{
+	const enum path_match_flags what = PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH;
+
+	return path_match_flags(path, what | PATH_MATCH_NATIVE);
+}
+#endif