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Diffstat (limited to 'dir.h')
| -rw-r--r-- | dir.h | 311 |
1 files changed, 311 insertions, 0 deletions
@@ -0,0 +1,311 @@ +#ifndef DIR_H +#define DIR_H + +/* See Documentation/technical/api-directory-listing.txt */ + +#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; + int flags; + + /* + * 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 sha1_stat { + struct stat_data stat; + unsigned char sha1[20]; + 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 SHA-1 means this directory does not have .gitignore */ + unsigned char exclude_sha1[20]; + char name[FLEX_ARRAY]; +}; + +struct untracked_cache { + struct sha1_stat ss_info_exclude; + struct sha1_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; +}; + +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 + } 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 sha1_stat ss_info_exclude; + struct sha1_stat ss_excludes_file; + unsigned unmanaged_exclude_files; +}; + +/* + * 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 +extern int simple_length(const char *match); +extern int no_wildcard(const char *string); +extern char *common_prefix(const struct pathspec *pathspec); +extern int match_pathspec(const struct pathspec *pathspec, + const char *name, int namelen, + int prefix, char *seen, int is_dir); +extern int report_path_error(const char *ps_matched, const struct pathspec *pathspec, const char *prefix); +extern int within_depth(const char *name, int namelen, int depth, int max_depth); + +extern int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec); +extern int read_directory(struct dir_struct *, const char *path, int len, const struct pathspec *pathspec); + +extern int is_excluded_from_list(const char *pathname, int pathlen, const char *basename, + int *dtype, struct exclude_list *el); +struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len); + +/* + * these implement the matching logic for dir.c:excluded_from_list and + * attr.c:path_matches() + */ +extern int match_basename(const char *, int, + const char *, int, int, int); +extern int match_pathname(const char *, int, + const char *, int, + const char *, int, int, int); + +extern struct exclude *last_exclude_matching(struct dir_struct *dir, + const char *name, int *dtype); + +extern int is_excluded(struct dir_struct *dir, const char *name, int *dtype); + +extern struct exclude_list *add_exclude_list(struct dir_struct *dir, + int group_type, const char *src); +extern int add_excludes_from_file_to_list(const char *fname, const char *base, int baselen, + struct exclude_list *el, int check_index); +extern void add_excludes_from_file(struct dir_struct *, const char *fname); +extern void parse_exclude_pattern(const char **string, int *patternlen, int *flags, int *nowildcardlen); +extern void add_exclude(const char *string, const char *base, + int baselen, struct exclude_list *el, int srcpos); +extern void clear_exclude_list(struct exclude_list *el); +extern void clear_directory(struct dir_struct *dir); +extern int file_exists(const char *); + +extern int is_inside_dir(const char *dir); +extern 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'))); +} + +extern int is_empty_dir(const char *dir); + +extern void setup_standard_excludes(struct dir_struct *dir); + +#define REMOVE_DIR_EMPTY_ONLY 01 +#define REMOVE_DIR_KEEP_NESTED_GIT 02 +#define REMOVE_DIR_KEEP_TOPLEVEL 04 +extern int remove_dir_recursively(struct strbuf *path, int flag); + +/* tries to remove the path with empty directories along it, ignores ENOENT */ +extern int remove_path(const char *path); + +extern int strcmp_icase(const char *a, const char *b); +extern int strncmp_icase(const char *a, const char *b, size_t count); +extern int fnmatch_icase(const char *pattern, const char *string, int flags); + +/* + * The prefix part of pattern must not contains wildcards. + */ +struct pathspec_item; +extern int git_fnmatch(const struct pathspec_item *item, + const char *pattern, const char *string, + int prefix); + +static inline int ce_path_match(const struct cache_entry *ce, + const struct pathspec *pathspec, + char *seen) +{ + return match_pathspec(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 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(pathspec, ent->name, len, prefix, seen, + has_trailing_dir); +} + +void untracked_cache_invalidate_path(struct index_state *, const char *); +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_ident(struct untracked_cache *); +#endif |