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 /*
  19  * Each excludes file will be parsed into a fresh exclude_list which
  20  * is appended to the relevant exclude_list_group (either EXC_DIRS or
  21  * EXC_FILE).  An exclude_list within the EXC_CMDL exclude_list_group
  22  * can also be used to represent the list of --exclude values passed
  23  * via CLI args.
  24  */
  25 struct exclude_list {
  26         int nr;
  27         int alloc;
  28
  29         /* remember pointer to exclude file contents so we can free() */
  30         char *filebuf;
  31
  32         /* origin of list, e.g. path to filename, or descriptive string */
  33         const char *src;
  34
  35         struct exclude {
  36                 /*
  37                  * This allows callers of last_exclude_matching() etc.
  38                  * to determine the origin of the matching pattern.
  39                  */
  40                 struct exclude_list *el;
  41
  42                 const char *pattern;
  43                 int patternlen;
  44                 int nowildcardlen;
  45                 const char *base;
  46                 int baselen;
  47                 int flags;
  48
  49                 /*
  50                  * Counting starts from 1 for line numbers in ignore files,
  51                  * and from -1 decrementing for patterns from CLI args.
  52                  */
  53                 int srcpos;
  54         } **excludes;
  55 };
  56
  57 /*
  58  * The contents of the per-directory exclude files are lazily read on
  59  * demand and then cached in memory, one per exclude_stack struct, in
  60  * order to avoid opening and parsing each one every time that
  61  * directory is traversed.
  62  */
  63 struct exclude_stack {
  64         struct exclude_stack *prev; /* the struct exclude_stack for the parent directory */
  65         int baselen;
  66         int exclude_ix; /* index of exclude_list within EXC_DIRS exclude_list_group */
  67 };
  68
  69 struct exclude_list_group {
  70         int nr, alloc;
  71         struct exclude_list *el;
  72 };
  73
  74 struct dir_struct {
  75         int nr, alloc;
  76         int ignored_nr, ignored_alloc;
  77         enum {
  78                 DIR_SHOW_IGNORED = 1<<0,
  79                 DIR_SHOW_OTHER_DIRECTORIES = 1<<1,
  80                 DIR_HIDE_EMPTY_DIRECTORIES = 1<<2,
  81                 DIR_NO_GITLINKS = 1<<3,
  82                 DIR_COLLECT_IGNORED = 1<<4,
  83                 DIR_SHOW_IGNORED_TOO = 1<<5,
  84                 DIR_COLLECT_KILLED_ONLY = 1<<6
  85         } flags;
  86         struct dir_entry **entries;
  87         struct dir_entry **ignored;
  88
  89         /* Exclude info */
  90         const char *exclude_per_dir;
  91
  92         /*
  93          * We maintain three groups of exclude pattern lists:
  94          *
  95          * EXC_CMDL lists patterns explicitly given on the command line.
  96          * EXC_DIRS lists patterns obtained from per-directory ignore files.
  97          * EXC_FILE lists patterns from fallback ignore files, e.g.
  98          *   - .git/info/exclude
  99          *   - core.excludesfile
 100          *
 101          * Each group contains multiple exclude lists, a single list
 102          * per source.
 103          */
 104 #define EXC_CMDL 0
 105 #define EXC_DIRS 1
 106 #define EXC_FILE 2
 107         struct exclude_list_group exclude_list_group[3];
 108
 109         /*
 110          * Temporary variables which are used during loading of the
 111          * per-directory exclude lists.
 112          *
 113          * exclude_stack points to the top of the exclude_stack, and
 114          * basebuf contains the full path to the current
 115          * (sub)directory in the traversal. Exclude points to the
 116          * matching exclude struct if the directory is excluded.
 117          */
 118         struct exclude_stack *exclude_stack;
 119         struct exclude *exclude;
 120         char basebuf[PATH_MAX];
 121 };
 122
 123 /*
 124  * The ordering of these constants is significant, with
 125  * higher-numbered match types signifying "closer" (i.e. more
 126  * specific) matches which will override lower-numbered match types
 127  * when populating the seen[] array.
 128  */
 129 #define MATCHED_RECURSIVELY 1
 130 #define MATCHED_FNMATCH 2
 131 #define MATCHED_EXACTLY 3
 132 extern int simple_length(const char *match);
 133 extern int no_wildcard(const char *string);
 134 extern char *common_prefix(const struct pathspec *pathspec);
 135 extern int match_pathspec(const struct pathspec *pathspec,
 136                           const char *name, int namelen,
 137                           int prefix, char *seen, int is_dir);
 138 extern int within_depth(const char *name, int namelen, int depth, int max_depth);
 139
 140 extern int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec);
 141 extern int read_directory(struct dir_struct *, const char *path, int len, const struct pathspec *pathspec);
 142
 143 extern int is_excluded_from_list(const char *pathname, int pathlen, const char *basename,
 144                                  int *dtype, struct exclude_list *el);
 145 struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len);
 146
 147 /*
 148  * these implement the matching logic for dir.c:excluded_from_list and
 149  * attr.c:path_matches()
 150  */
 151 extern int match_basename(const char *, int,
 152                           const char *, int, int, int);
 153 extern int match_pathname(const char *, int,
 154                           const char *, int,
 155                           const char *, int, int, int);
 156
 157 extern struct exclude *last_exclude_matching(struct dir_struct *dir,
 158                                              const char *name, int *dtype);
 159
 160 extern int is_excluded(struct dir_struct *dir, const char *name, int *dtype);
 161
 162 extern struct exclude_list *add_exclude_list(struct dir_struct *dir,
 163                                              int group_type, const char *src);
 164 extern int add_excludes_from_file_to_list(const char *fname, const char *base, int baselen,
 165                                           struct exclude_list *el, int check_index);
 166 extern void add_excludes_from_file(struct dir_struct *, const char *fname);
 167 extern void parse_exclude_pattern(const char **string, int *patternlen, int *flags, int *nowildcardlen);
 168 extern void add_exclude(const char *string, const char *base,
 169                         int baselen, struct exclude_list *el, int srcpos);
 170 extern void clear_exclude_list(struct exclude_list *el);
 171 extern void clear_directory(struct dir_struct *dir);
 172 extern int file_exists(const char *);
 173
 174 extern int is_inside_dir(const char *dir);
 175 extern int dir_inside_of(const char *subdir, const char *dir);
 176
 177 static inline int is_dot_or_dotdot(const char *name)
 178 {
 179         return (name[0] == '.' &&
 180                 (name[1] == '\0' ||
 181                  (name[1] == '.' && name[2] == '\0')));
 182 }
 183
 184 extern int is_empty_dir(const char *dir);
 185
 186 extern void setup_standard_excludes(struct dir_struct *dir);
 187
 188 #define REMOVE_DIR_EMPTY_ONLY 01
 189 #define REMOVE_DIR_KEEP_NESTED_GIT 02
 190 #define REMOVE_DIR_KEEP_TOPLEVEL 04
 191 extern int remove_dir_recursively(struct strbuf *path, int flag);
 192
 193 /* tries to remove the path with empty directories along it, ignores ENOENT */
 194 extern int remove_path(const char *path);
 195
 196 extern int strcmp_icase(const char *a, const char *b);
 197 extern int strncmp_icase(const char *a, const char *b, size_t count);
 198 extern int fnmatch_icase(const char *pattern, const char *string, int flags);
 199
 200 /*
 201  * The prefix part of pattern must not contains wildcards.
 202  */
 203 struct pathspec_item;
 204 extern int git_fnmatch(const struct pathspec_item *item,
 205                        const char *pattern, const char *string,
 206                        int prefix);
 207
 208 static inline int ce_path_match(const struct cache_entry *ce,
 209                                 const struct pathspec *pathspec,
 210                                 char *seen)
 211 {
 212         return match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen,
 213                               S_ISDIR(ce->ce_mode) || S_ISGITLINK(ce->ce_mode));
 214 }
 215
 216 static inline int dir_path_match(const struct dir_entry *ent,
 217                                  const struct pathspec *pathspec,
 218                                  int prefix, char *seen)
 219 {
 220         int has_trailing_dir = ent->len && ent->name[ent->len - 1] == '/';
 221         int len = has_trailing_dir ? ent->len - 1 : ent->len;
 222         return match_pathspec(pathspec, ent->name, len, prefix, seen,
 223                               has_trailing_dir);
 224 }
 225
 226 #endif