Merge branch 'as/doc-for-devs'

diff --git a/attr.c b/attr.c
index 303751f6c2bd4d558cffbb928c636581efb2b310..097ae87f3c2b4093fffe6586f036918367fa672e 100644 (file)
--- a/attr.c
+++ b/attr.c
@@ -115,6 +115,13 @@ struct attr_state {
        const char *setto;
 };
 
+struct pattern {
+       const char *pattern;
+       int patternlen;
+       int nowildcardlen;
+       int flags;              /* EXC_FLAG_* */
+};
+
 /*
  * One rule, as from a .gitattributes file.
  *
@@ -131,7 +138,7 @@ struct attr_state {
  */
 struct match_attr {
        union {
-               char *pattern;
+               struct pattern pat;
                struct git_attr *attr;
        } u;
        char is_macro;
@@ -241,9 +248,16 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
        if (is_macro)
                res->u.attr = git_attr_internal(name, namelen);
        else {
-               res->u.pattern = (char *)&(res->state[num_attr]);
-               memcpy(res->u.pattern, name, namelen);
-               res->u.pattern[namelen] = 0;
+               char *p = (char *)&(res->state[num_attr]);
+               memcpy(p, name, namelen);
+               res->u.pat.pattern = p;
+               parse_exclude_pattern(&res->u.pat.pattern,
+                                     &res->u.pat.patternlen,
+                                     &res->u.pat.flags,
+                                     &res->u.pat.nowildcardlen);
+               if (res->u.pat.flags & EXC_FLAG_NEGATIVE)
+                       die(_("Negative patterns are forbidden in git attributes\n"
+                             "Use '\\!' for literal leading exclamation."));
        }
        res->is_macro = is_macro;
        res->num_attr = num_attr;
@@ -277,6 +291,7 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
 static struct attr_stack {
        struct attr_stack *prev;
        char *origin;
+       size_t originlen;
        unsigned num_matches;
        unsigned alloc;
        struct match_attr **attrs;
@@ -306,7 +321,7 @@ static void free_attr_elem(struct attr_stack *e)
 }
 
 static const char *builtin_attr[] = {
-       "[attr]binary -diff -text",
+       "[attr]binary -diff -merge -text",
        NULL,
 };
 
@@ -352,8 +367,11 @@ static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
        char buf[2048];
        int lineno = 0;
 
-       if (!fp)
+       if (!fp) {
+               if (errno != ENOENT && errno != ENOTDIR)
+                       warn_on_inaccessible(path);
                return NULL;
+       }
        res = xcalloc(1, sizeof(*res));
        while (fgets(buf, sizeof(buf), fp))
                handle_attr_line(res, buf, path, ++lineno, macro_ok);
@@ -497,6 +515,7 @@ static int git_attr_system(void)
 static void bootstrap_attr_stack(void)
 {
        struct attr_stack *elem;
+       char *xdg_attributes_file;
 
        if (attr_stack)
                return;
@@ -515,6 +534,10 @@ static void bootstrap_attr_stack(void)
                }
        }
 
+       if (!git_attributes_file) {
+               home_config_paths(NULL, &xdg_attributes_file, "attributes");
+               git_attributes_file = xdg_attributes_file;
+       }
        if (git_attributes_file) {
                elem = read_attr_from_file(git_attributes_file, 1);
                if (elem) {
@@ -527,6 +550,7 @@ static void bootstrap_attr_stack(void)
        if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
                elem = read_attr(GITATTRIBUTES_FILE, 1);
                elem->origin = xstrdup("");
+               elem->originlen = 0;
                elem->prev = attr_stack;
                attr_stack = elem;
                debug_push(elem);
@@ -620,7 +644,7 @@ static void prepare_attr_stack(const char *path)
                        strbuf_addstr(&pathbuf, GITATTRIBUTES_FILE);
                        elem = read_attr(pathbuf.buf, 0);
                        strbuf_setlen(&pathbuf, cp - path);
-                       elem->origin = strbuf_detach(&pathbuf, NULL);
+                       elem->origin = strbuf_detach(&pathbuf, &elem->originlen);
                        elem->prev = attr_stack;
                        attr_stack = elem;
                        debug_push(elem);
@@ -637,28 +661,22 @@ static void prepare_attr_stack(const char *path)
 }
 
 static int path_matches(const char *pathname, int pathlen,
-                       const char *pattern,
+                       const char *basename,
+                       const struct pattern *pat,
                        const char *base, int baselen)
 {
-       if (!strchr(pattern, '/')) {
-               /* match basename */
-               const char *basename = strrchr(pathname, '/');
-               basename = basename ? basename + 1 : pathname;
-               return (fnmatch_icase(pattern, basename, 0) == 0);
+       const char *pattern = pat->pattern;
+       int prefix = pat->nowildcardlen;
+
+       if (pat->flags & EXC_FLAG_NODIR) {
+               return match_basename(basename,
+                                     pathlen - (basename - pathname),
+                                     pattern, prefix,
+                                     pat->patternlen, pat->flags);
        }
-       /*
-        * match with FNM_PATHNAME; the pattern has base implicitly
-        * in front of it.
-        */
-       if (*pattern == '/')
-               pattern++;
-       if (pathlen < baselen ||
-           (baselen && pathname[baselen] != '/') ||
-           strncmp(pathname, base, baselen))
-               return 0;
-       if (baselen != 0)
-               baselen++;
-       return fnmatch_icase(pattern, pathname + baselen, FNM_PATHNAME) == 0;
+       return match_pathname(pathname, pathlen,
+                             base, baselen,
+                             pattern, prefix, pat->patternlen, pat->flags);
 }
 
 static int macroexpand_one(int attr_nr, int rem);
@@ -685,7 +703,8 @@ static int fill_one(const char *what, struct match_attr *a, int rem)
        return rem;
 }
 
-static int fill(const char *path, int pathlen, struct attr_stack *stk, int rem)
+static int fill(const char *path, int pathlen, const char *basename,
+               struct attr_stack *stk, int rem)
 {
        int i;
        const char *base = stk->origin ? stk->origin : "";
@@ -694,8 +713,8 @@ static int fill(const char *path, int pathlen, struct attr_stack *stk, int rem)
                struct match_attr *a = stk->attrs[i];
                if (a->is_macro)
                        continue;
-               if (path_matches(path, pathlen,
-                                a->u.pattern, base, strlen(base)))
+               if (path_matches(path, pathlen, basename,
+                                &a->u.pat, base, stk->originlen))
                        rem = fill_one("fill", a, rem);
        }
        return rem;
@@ -733,15 +752,19 @@ static void collect_all_attrs(const char *path)
 {
        struct attr_stack *stk;
        int i, pathlen, rem;
+       const char *basename;
 
        prepare_attr_stack(path);
        for (i = 0; i < attr_nr; i++)
                check_all_attr[i].value = ATTR__UNKNOWN;
 
+       basename = strrchr(path, '/');
+       basename = basename ? basename + 1 : path;
+
        pathlen = strlen(path);
        rem = attr_nr;
        for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
-               rem = fill(path, pathlen, stk, rem);
+               rem = fill(path, pathlen, basename, stk, rem);
 }
 
 int git_check_attr(const char *path, int num, struct git_attr_check *check)