builtin-add: warn on unmatched pathspecs

This is in the same spirit as what bba319b5 and 45e48120 tried
to do to help users.  A command such as "git add Documentaiton"
with misspelled pathspecs would give a friendly reminder with
this.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-add.c b/builtin-add.c
index d225988..089c7a8 100644 (file)
--- a/builtin-add.c
+++ b/builtin-add.c
@@ -44,50 +44,89 @@ static int common_prefix(const char **pathspec)
        return prefix;
 }
 
-static int match(const char **pathspec, const char *name, int namelen, int prefix)
+static int match_one(const char *match, const char *name, int namelen)
 {
+       int matchlen;
+
+       /* If the match was just the prefix, we matched */
+       matchlen = strlen(match);
+       if (!matchlen)
+               return 1;
+
+       /*
+        * If we don't match the matchstring exactly,
+        * we need to match by fnmatch
+        */
+       if (strncmp(match, name, matchlen))
+               return !fnmatch(match, name, 0);
+
+       /*
+        * If we did match the string exactly, we still
+        * need to make sure that it happened on a path
+        * component boundary (ie either the last character
+        * of the match was '/', or the next character of
+        * the name was '/' or the terminating NUL.
+        */
+       return  match[matchlen-1] == '/' ||
+               name[matchlen] == '/' ||
+               !name[matchlen];
+}
+
+static int match(const char **pathspec, const char *name, int namelen, int prefix, char *seen)
+{
+       int retval;
        const char *match;
 
        name += prefix;
        namelen -= prefix;
 
-       while ((match = *pathspec++) != NULL) {
-               int matchlen;
-
+       for (retval = 0; (match = *pathspec++) != NULL; seen++) {
+               if (retval & *seen)
+                       continue;
                match += prefix;
-               matchlen = strlen(match);
-               if (!matchlen)
-                       return 1;
-               if (!strncmp(match, name, matchlen)) {
-                       if (match[matchlen-1] == '/')
-                               return 1;
-                       switch (name[matchlen]) {
-                       case '/': case '\0':
-                               return 1;
-                       }
+               if (match_one(match, name, namelen)) {
+                       retval = 1;
+                       *seen = 1;
                }
-               if (!fnmatch(match, name, 0))
-                       return 1;
        }
-       return 0;
+       return retval;
 }
 
 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
 {
-       int i;
+       char *seen;
+       int i, specs;
        struct dir_entry **src, **dst;
 
+       for (specs = 0; pathspec[specs];  specs++)
+               /* nothing */;
+       seen = xmalloc(specs);
+       memset(seen, 0, specs);
+
        src = dst = dir->entries;
        i = dir->nr;
        while (--i >= 0) {
                struct dir_entry *entry = *src++;
-               if (!match(pathspec, entry->name, entry->len, prefix)) {
+               if (!match(pathspec, entry->name, entry->len, prefix, seen)) {
                        free(entry);
                        continue;
                }
                *dst++ = entry;
        }
        dir->nr = dst - dir->entries;
+
+       for (i = 0; i < specs; i++) {
+               struct stat st;
+               const char *match;
+               if (seen[i])
+                       continue;
+
+               /* Existing file? We must have ignored it */
+               match = pathspec[i];
+               if (!lstat(match, &st))
+                       continue;
+               die("pathspec '%s' did not match any files", match);
+       }
 }
 
 static void fill_directory(struct dir_struct *dir, const char **pathspec)