dir.h

   1 #ifndef DIR_H
   2 #define DIR_H
   3
   4 /* See Documentation/technical/api-directory-listing.txt */
   5
   6 #include "strbuf.h"
   7
   8 struct dir_entry {
   9         unsigned int len;
  10         char name[FLEX_ARRAY]; /* more */
  11 };
  12
  13 #define EXC_FLAG_NODIR 1
  14 #define EXC_FLAG_ENDSWITH 4
  15 #define EXC_FLAG_MUSTBEDIR 8
  16 #define EXC_FLAG_NEGATIVE 16
  17
  18 struct exclude {
  19         /*
  20          * This allows callers of last_exclude_matching() etc.
  21          * to determine the origin of the matching pattern.
  22          */
  23         struct exclude_list *el;
  24
  25         const char *pattern;
  26         int patternlen;
  27         int nowildcardlen;
  28         const char *base;
  29         int baselen;
  30         unsigned flags;         /* EXC_FLAG_* */
  31
  32         /*
  33          * Counting starts from 1 for line numbers in ignore files,
  34          * and from -1 decrementing for patterns from CLI args.
  35          */
  36         int srcpos;
  37 };
  38
  39 /*
  40  * Each excludes file will be parsed into a fresh exclude_list which
  41  * is appended to the relevant exclude_list_group (either EXC_DIRS or
  42  * EXC_FILE).  An exclude_list within the EXC_CMDL exclude_list_group
  43  * can also be used to represent the list of --exclude values passed
  44  * via CLI args.
  45  */
  46 struct exclude_list {
  47         int nr;
  48         int alloc;
  49
  50         /* remember pointer to exclude file contents so we can free() */
  51         char *filebuf;
  52
  53         /* origin of list, e.g. path to filename, or descriptive string */
  54         const char *src;
  55
  56         struct exclude **excludes;
  57 };
  58
  59 /*
  60  * The contents of the per-directory exclude files are lazily read on
  61  * demand and then cached in memory, one per exclude_stack struct, in
  62  * order to avoid opening and parsing each one every time that
  63  * directory is traversed.
  64  */
  65 struct exclude_stack {
  66         struct exclude_stack *prev; /* the struct exclude_stack for the parent directory */
  67         int baselen;
  68         int exclude_ix; /* index of exclude_list within EXC_DIRS exclude_list_group */
  69         struct untracked_cache_dir *ucd;
  70 };
  71
  72 struct exclude_list_group {
  73         int nr, alloc;
  74         struct exclude_list *el;
  75 };
  76
  77 struct sha1_stat {
  78         struct stat_data stat;
  79         unsigned char sha1[20];
  80         int valid;
  81 };
  82
  83 /*
  84  *  Untracked cache
  85  *
  86  *  The following inputs are sufficient to determine what files in a
  87  *  directory are excluded:
  88  *
  89  *   - The list of files and directories of the directory in question
  90  *   - The $GIT_DIR/index
  91  *   - dir_struct flags
  92  *   - The content of $GIT_DIR/info/exclude
  93  *   - The content of core.excludesfile
  94  *   - The content (or the lack) of .gitignore of all parent directories
  95  *     from $GIT_WORK_TREE
  96  *   - The check_only flag in read_directory_recursive (for
  97  *     DIR_HIDE_EMPTY_DIRECTORIES)
  98  *
  99  *  The first input can be checked using directory mtime. In many
 100  *  filesystems, directory mtime (stat_data field) is updated when its
 101  *  files or direct subdirs are added or removed.
 102  *
 103  *  The second one can be hooked from cache_tree_invalidate_path().
 104  *  Whenever a file (or a submodule) is added or removed from a
 105  *  directory, we invalidate that directory.
 106  *
 107  *  The remaining inputs are easy, their SHA-1 could be used to verify
 108  *  their contents (exclude_sha1[], info_exclude_sha1[] and
 109  *  excludes_file_sha1[])
 110  */
 111 struct untracked_cache_dir {
 112         struct untracked_cache_dir **dirs;
 113         char **untracked;
 114         struct stat_data stat_data;
 115         unsigned int untracked_alloc, dirs_nr, dirs_alloc;
 116         unsigned int untracked_nr;
 117         unsigned int check_only : 1;
 118         /* all data except 'dirs' in this struct are good */
 119         unsigned int valid : 1;
 120         unsigned int recurse : 1;
 121         /* null SHA-1 means this directory does not have .gitignore */
 122         unsigned char exclude_sha1[20];
 123         char name[FLEX_ARRAY];
 124 };
 125
 126 struct untracked_cache {
 127         struct sha1_stat ss_info_exclude;
 128         struct sha1_stat ss_excludes_file;
 129         const char *exclude_per_dir;
 130         struct strbuf ident;
 131         /*
 132          * dir_struct#flags must match dir_flags or the untracked
 133          * cache is ignored.
 134          */
 135         unsigned dir_flags;
 136         struct untracked_cache_dir *root;
 137         /* Statistics */
 138         int dir_created;
 139         int gitignore_invalidated;
 140         int dir_invalidated;
 141         int dir_opened;
 142 };
 143
 144 struct dir_struct {
 145         int nr, alloc;
 146         int ignored_nr, ignored_alloc;
 147         enum {
 148                 DIR_SHOW_IGNORED = 1<<0,
 149                 DIR_SHOW_OTHER_DIRECTORIES = 1<<1,
 150                 DIR_HIDE_EMPTY_DIRECTORIES = 1<<2,
 151                 DIR_NO_GITLINKS = 1<<3,
 152                 DIR_COLLECT_IGNORED = 1<<4,
 153                 DIR_SHOW_IGNORED_TOO = 1<<5,
 154                 DIR_COLLECT_KILLED_ONLY = 1<<6
 155         } flags;
 156         struct dir_entry **entries;
 157         struct dir_entry **ignored;
 158
 159         /* Exclude info */
 160         const char *exclude_per_dir;
 161
 162         /*
 163          * We maintain three groups of exclude pattern lists:
 164          *
 165          * EXC_CMDL lists patterns explicitly given on the command line.
 166          * EXC_DIRS lists patterns obtained from per-directory ignore files.
 167          * EXC_FILE lists patterns from fallback ignore files, e.g.
 168          *   - .git/info/exclude
 169          *   - core.excludesfile
 170          *
 171          * Each group contains multiple exclude lists, a single list
 172          * per source.
 173          */
 174 #define EXC_CMDL 0
 175 #define EXC_DIRS 1
 176 #define EXC_FILE 2
 177         struct exclude_list_group exclude_list_group[3];
 178
 179         /*
 180          * Temporary variables which are used during loading of the
 181          * per-directory exclude lists.
 182          *
 183          * exclude_stack points to the top of the exclude_stack, and
 184          * basebuf contains the full path to the current
 185          * (sub)directory in the traversal. Exclude points to the
 186          * matching exclude struct if the directory is excluded.
 187          */
 188         struct exclude_stack *exclude_stack;
 189         struct exclude *exclude;
 190         struct strbuf basebuf;
 191
 192         /* Enable untracked file cache if set */
 193         struct untracked_cache *untracked;
 194         struct sha1_stat ss_info_exclude;
 195         struct sha1_stat ss_excludes_file;
 196         unsigned unmanaged_exclude_files;
 197 };
 198
 199 /*
 200  * The ordering of these constants is significant, with
 201  * higher-numbered match types signifying "closer" (i.e. more
 202  * specific) matches which will override lower-numbered match types
 203  * when populating the seen[] array.
 204  */
 205 #define MATCHED_RECURSIVELY 1
 206 #define MATCHED_FNMATCH 2
 207 #define MATCHED_EXACTLY 3
 208 extern int simple_length(const char *match);
 209 extern int no_wildcard(const char *string);
 210 extern char *common_prefix(const struct pathspec *pathspec);
 211 extern int match_pathspec(const struct pathspec *pathspec,
 212                           const char *name, int namelen,
 213                           int prefix, char *seen, int is_dir);
 214 extern int report_path_error(const char *ps_matched, const struct pathspec *pathspec, const char *prefix);
 215 extern int within_depth(const char *name, int namelen, int depth, int max_depth);
 216
 217 extern int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec);
 218 extern int read_directory(struct dir_struct *, const char *path, int len, const struct pathspec *pathspec);
 219
 220 extern int is_excluded_from_list(const char *pathname, int pathlen, const char *basename,
 221                                  int *dtype, struct exclude_list *el);
 222 struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len);
 223
 224 /*
 225  * these implement the matching logic for dir.c:excluded_from_list and
 226  * attr.c:path_matches()
 227  */
 228 extern int match_basename(const char *, int,
 229                           const char *, int, int, unsigned);
 230 extern int match_pathname(const char *, int,
 231                           const char *, int,
 232                           const char *, int, int, unsigned);
 233
 234 extern struct exclude *last_exclude_matching(struct dir_struct *dir,
 235                                              const char *name, int *dtype);
 236
 237 extern int is_excluded(struct dir_struct *dir, const char *name, int *dtype);
 238
 239 extern struct exclude_list *add_exclude_list(struct dir_struct *dir,
 240                                              int group_type, const char *src);
 241 extern int add_excludes_from_file_to_list(const char *fname, const char *base, int baselen,
 242                                           struct exclude_list *el, int check_index);
 243 extern void add_excludes_from_file(struct dir_struct *, const char *fname);
 244 extern void parse_exclude_pattern(const char **string, int *patternlen, unsigned *flags, int *nowildcardlen);
 245 extern void add_exclude(const char *string, const char *base,
 246                         int baselen, struct exclude_list *el, int srcpos);
 247 extern void clear_exclude_list(struct exclude_list *el);
 248 extern void clear_directory(struct dir_struct *dir);
 249 extern int file_exists(const char *);
 250
 251 extern int is_inside_dir(const char *dir);
 252 extern int dir_inside_of(const char *subdir, const char *dir);
 253
 254 static inline int is_dot_or_dotdot(const char *name)
 255 {
 256         return (name[0] == '.' &&
 257                 (name[1] == '\0' ||
 258                  (name[1] == '.' && name[2] == '\0')));
 259 }
 260
 261 extern int is_empty_dir(const char *dir);
 262
 263 extern void setup_standard_excludes(struct dir_struct *dir);
 264
 265 #define REMOVE_DIR_EMPTY_ONLY 01
 266 #define REMOVE_DIR_KEEP_NESTED_GIT 02
 267 #define REMOVE_DIR_KEEP_TOPLEVEL 04
 268 extern int remove_dir_recursively(struct strbuf *path, int flag);
 269
 270 /* tries to remove the path with empty directories along it, ignores ENOENT */
 271 extern int remove_path(const char *path);
 272
 273 extern int fspathcmp(const char *a, const char *b);
 274 extern int fspathncmp(const char *a, const char *b, size_t count);
 275
 276 /*
 277  * The prefix part of pattern must not contains wildcards.
 278  */
 279 struct pathspec_item;
 280 extern int git_fnmatch(const struct pathspec_item *item,
 281                        const char *pattern, const char *string,
 282                        int prefix);
 283
 284 static inline int ce_path_match(const struct cache_entry *ce,
 285                                 const struct pathspec *pathspec,
 286                                 char *seen)
 287 {
 288         return match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen,
 289                               S_ISDIR(ce->ce_mode) || S_ISGITLINK(ce->ce_mode));
 290 }
 291
 292 static inline int dir_path_match(const struct dir_entry *ent,
 293                                  const struct pathspec *pathspec,
 294                                  int prefix, char *seen)
 295 {
 296         int has_trailing_dir = ent->len && ent->name[ent->len - 1] == '/';
 297         int len = has_trailing_dir ? ent->len - 1 : ent->len;
 298         return match_pathspec(pathspec, ent->name, len, prefix, seen,
 299                               has_trailing_dir);
 300 }
 301
 302 void untracked_cache_invalidate_path(struct index_state *, const char *);
 303 void untracked_cache_remove_from_index(struct index_state *, const char *);
 304 void untracked_cache_add_to_index(struct index_state *, const char *);
 305
 306 void free_untracked_cache(struct untracked_cache *);
 307 struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz);
 308 void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked);
 309 void add_untracked_cache(struct index_state *istate);
 310 void remove_untracked_cache(struct index_state *istate);
 311 #endif