pathspec.h

   1 #ifndef PATHSPEC_H
   2 #define PATHSPEC_H
   3
   4 struct index_state;
   5
   6 /* Pathspec magic */
   7 #define PATHSPEC_FROMTOP        (1<<0)
   8 #define PATHSPEC_MAXDEPTH       (1<<1)
   9 #define PATHSPEC_LITERAL        (1<<2)
  10 #define PATHSPEC_GLOB           (1<<3)
  11 #define PATHSPEC_ICASE          (1<<4)
  12 #define PATHSPEC_EXCLUDE        (1<<5)
  13 #define PATHSPEC_ATTR           (1<<6)
  14 #define PATHSPEC_ALL_MAGIC        \
  15         (PATHSPEC_FROMTOP       | \
  16          PATHSPEC_MAXDEPTH      | \
  17          PATHSPEC_LITERAL       | \
  18          PATHSPEC_GLOB          | \
  19          PATHSPEC_ICASE         | \
  20          PATHSPEC_EXCLUDE       | \
  21          PATHSPEC_ATTR)
  22
  23 #define PATHSPEC_ONESTAR 1      /* the pathspec pattern satisfies GFNM_ONESTAR */
  24
  25 /**
  26  * See glossary-context.txt for the syntax of pathspec.
  27  * In memory, a pathspec set is represented by "struct pathspec" and is
  28  * prepared by parse_pathspec().
  29  */
  30 struct pathspec {
  31         int nr;
  32         unsigned int has_wildcard:1;
  33         unsigned int recursive:1;
  34         unsigned int recurse_submodules:1;
  35         unsigned magic;
  36         int max_depth;
  37         struct pathspec_item {
  38                 char *match;
  39                 char *original;
  40                 unsigned magic;
  41                 int len, prefix;
  42                 int nowildcard_len;
  43                 int flags;
  44                 int attr_match_nr;
  45                 struct attr_match {
  46                         char *value;
  47                         enum attr_match_mode {
  48                                 MATCH_SET,
  49                                 MATCH_UNSET,
  50                                 MATCH_VALUE,
  51                                 MATCH_UNSPECIFIED
  52                         } match_mode;
  53                 } *attr_match;
  54                 struct attr_check *attr_check;
  55         } *items;
  56 };
  57
  58 #define GUARD_PATHSPEC(ps, mask) \
  59         do { \
  60                 if ((ps)->magic & ~(mask))             \
  61                         die("BUG:%s:%d: unsupported magic %x",  \
  62                             __FILE__, __LINE__, (ps)->magic & ~(mask)); \
  63         } while (0)
  64
  65 /* parse_pathspec flags */
  66 #define PATHSPEC_PREFER_CWD (1<<0) /* No args means match cwd */
  67 #define PATHSPEC_PREFER_FULL (1<<1) /* No args means match everything */
  68 #define PATHSPEC_MAXDEPTH_VALID (1<<2) /* max_depth field is valid */
  69 /* die if a symlink is part of the given path's directory */
  70 #define PATHSPEC_SYMLINK_LEADING_PATH (1<<3)
  71 #define PATHSPEC_PREFIX_ORIGIN (1<<4)
  72 #define PATHSPEC_KEEP_ORDER (1<<5)
  73 /*
  74  * For the callers that just need pure paths from somewhere else, not
  75  * from command line. Global --*-pathspecs options are ignored. No
  76  * magic is parsed in each pathspec either. If PATHSPEC_LITERAL is
  77  * allowed, then it will automatically set for every pathspec.
  78  */
  79 #define PATHSPEC_LITERAL_PATH (1<<6)
  80
  81 /**
  82  * Given command line arguments and a prefix, convert the input to
  83  * pathspec. die() if any magic in magic_mask is used.
  84  *
  85  * Any arguments used are copied. It is safe for the caller to modify
  86  * or free 'prefix' and 'args' after calling this function.
  87  *
  88  * - magic_mask specifies what features that are NOT supported by the following
  89  * code. If a user attempts to use such a feature, parse_pathspec() can reject
  90  * it early.
  91  *
  92  * - flags specifies other things that the caller wants parse_pathspec to
  93  * perform.
  94  *
  95  * - prefix and args come from cmd_* functions
  96  *
  97  * parse_pathspec() helps catch unsupported features and reject them politely.
  98  * At a lower level, different pathspec-related functions may not support the
  99  * same set of features. Such pathspec-sensitive functions are guarded with
 100  * GUARD_PATHSPEC(), which will die in an unfriendly way when an unsupported
 101  * feature is requested.
 102  *
 103  * The command designers are supposed to make sure that GUARD_PATHSPEC() never
 104  * dies. They have to make sure all unsupported features are caught by
 105  * parse_pathspec(), not by GUARD_PATHSPEC. grepping GUARD_PATHSPEC() should
 106  * give the designers all pathspec-sensitive codepaths and what features they
 107  * support.
 108  *
 109  * A similar process is applied when a new pathspec magic is added. The designer
 110  * lifts the GUARD_PATHSPEC restriction in the functions that support the new
 111  * magic. At the same time (s)he has to make sure this new feature will be
 112  * caught at parse_pathspec() in commands that cannot handle the new magic in
 113  * some cases. grepping parse_pathspec() should help.
 114  */
 115 void parse_pathspec(struct pathspec *pathspec,
 116                     unsigned magic_mask,
 117                     unsigned flags,
 118                     const char *prefix,
 119                     const char **args);
 120
 121 void copy_pathspec(struct pathspec *dst, const struct pathspec *src);
 122 void clear_pathspec(struct pathspec *);
 123
 124 static inline int ps_strncmp(const struct pathspec_item *item,
 125                              const char *s1, const char *s2, size_t n)
 126 {
 127         if (item->magic & PATHSPEC_ICASE)
 128                 return strncasecmp(s1, s2, n);
 129         else
 130                 return strncmp(s1, s2, n);
 131 }
 132
 133 static inline int ps_strcmp(const struct pathspec_item *item,
 134                             const char *s1, const char *s2)
 135 {
 136         if (item->magic & PATHSPEC_ICASE)
 137                 return strcasecmp(s1, s2);
 138         else
 139                 return strcmp(s1, s2);
 140 }
 141
 142 void add_pathspec_matches_against_index(const struct pathspec *pathspec,
 143                                         const struct index_state *istate,
 144                                         char *seen);
 145 char *find_pathspecs_matching_against_index(const struct pathspec *pathspec,
 146                                             const struct index_state *istate);
 147 int match_pathspec_attrs(const struct index_state *istate,
 148                          const char *name, int namelen,
 149                          const struct pathspec_item *item);
 150
 151 #endif /* PATHSPEC_H */