apply: force matching at the beginning.
[gitweb.git] / update-index.c
index 9fa3d2bb96a6e01a6d28fa80efc60871ca32dbf9..7d6de821e23fc02b19b970df94200edd31bc864f 100644 (file)
@@ -18,9 +18,6 @@
 static int allow_add;
 static int allow_remove;
 static int allow_replace;
-static int allow_unmerged; /* --refresh needing merge is not error */
-static int not_new; /* --refresh not having working tree files is not error */
-static int quiet; /* --refresh needing update is not error */
 static int info_only;
 static int force_remove;
 static int verbose;
@@ -28,23 +25,6 @@ static int mark_valid_only = 0;
 #define MARK_VALID 1
 #define UNMARK_VALID 2
 
-
-/* Three functions to allow overloaded pointer return; see linux/err.h */
-static inline void *ERR_PTR(long error)
-{
-       return (void *) error;
-}
-
-static inline long PTR_ERR(const void *ptr)
-{
-       return (long) ptr;
-}
-
-static inline long IS_ERR(const void *ptr)
-{
-       return (unsigned long)ptr > (unsigned long)-1000L;
-}
-
 static void report(const char *fmt, ...)
 {
        va_list vp;
@@ -140,103 +120,6 @@ static int add_file_to_cache(const char *path)
        return 0;
 }
 
-/*
- * "refresh" does not calculate a new sha1 file or bring the
- * cache up-to-date for mode/content changes. But what it
- * _does_ do is to "re-match" the stat information of a file
- * with the cache, so that you can refresh the cache for a
- * file that hasn't been changed but where the stat entry is
- * out of date.
- *
- * For example, you'd want to do this after doing a "git-read-tree",
- * to link up the stat cache details with the proper files.
- */
-static struct cache_entry *refresh_entry(struct cache_entry *ce, int really)
-{
-       struct stat st;
-       struct cache_entry *updated;
-       int changed, size;
-
-       if (lstat(ce->name, &st) < 0)
-               return ERR_PTR(-errno);
-
-       changed = ce_match_stat(ce, &st, really);
-       if (!changed) {
-               if (really && assume_unchanged &&
-                   !(ce->ce_flags & htons(CE_VALID)))
-                       ; /* mark this one VALID again */
-               else
-                       return NULL;
-       }
-
-       if (ce_modified(ce, &st, really))
-               return ERR_PTR(-EINVAL);
-
-       size = ce_size(ce);
-       updated = xmalloc(size);
-       memcpy(updated, ce, size);
-       fill_stat_cache_info(updated, &st);
-
-       /* In this case, if really is not set, we should leave
-        * CE_VALID bit alone.  Otherwise, paths marked with
-        * --no-assume-unchanged (i.e. things to be edited) will
-        * reacquire CE_VALID bit automatically, which is not
-        * really what we want.
-        */
-       if (!really && assume_unchanged && !(ce->ce_flags & htons(CE_VALID)))
-               updated->ce_flags &= ~htons(CE_VALID);
-
-       return updated;
-}
-
-static int refresh_cache(int really)
-{
-       int i;
-       int has_errors = 0;
-
-       for (i = 0; i < active_nr; i++) {
-               struct cache_entry *ce, *new;
-               ce = active_cache[i];
-               if (ce_stage(ce)) {
-                       while ((i < active_nr) &&
-                              ! strcmp(active_cache[i]->name, ce->name))
-                               i++;
-                       i--;
-                       if (allow_unmerged)
-                               continue;
-                       printf("%s: needs merge\n", ce->name);
-                       has_errors = 1;
-                       continue;
-               }
-
-               new = refresh_entry(ce, really);
-               if (!new)
-                       continue;
-               if (IS_ERR(new)) {
-                       if (not_new && PTR_ERR(new) == -ENOENT)
-                               continue;
-                       if (really && PTR_ERR(new) == -EINVAL) {
-                               /* If we are doing --really-refresh that
-                                * means the index is not valid anymore.
-                                */
-                               ce->ce_flags &= ~htons(CE_VALID);
-                               active_cache_changed = 1;
-                       }
-                       if (quiet)
-                               continue;
-                       printf("%s: needs update\n", ce->name);
-                       has_errors = 1;
-                       continue;
-               }
-               active_cache_changed = 1;
-               /* You can NOT just free active_cache[i] here, since it
-                * might not be necessarily malloc()ed but can also come
-                * from mmap(). */
-               active_cache[i] = new;
-       }
-       return has_errors;
-}
-
 /*
  * We fundamentally don't like some paths: we don't want
  * dot or dot-dot anywhere, and for obvious reasons don't
@@ -364,23 +247,26 @@ static void update_one(const char *path, const char *prefix, int prefix_length)
        const char *p = prefix_path(prefix, prefix_length, path);
        if (!verify_path(p)) {
                fprintf(stderr, "Ignoring path %s\n", path);
-               return;
+               goto free_return;
        }
        if (mark_valid_only) {
                if (mark_valid(p))
                        die("Unable to mark file %s", path);
-               return;
+               goto free_return;
        }
 
        if (force_remove) {
                if (remove_file_from_cache(p))
                        die("git-update-index: unable to remove %s", path);
                report("remove '%s'", path);
-               return;
+               goto free_return;
        }
        if (add_file_to_cache(p))
                die("Unable to process file %s", path);
        report("add '%s'", path);
+ free_return:
+       if (p < path || p > path + strlen(path))
+               free((char*)p);
 }
 
 static void read_index_info(int line_termination)
@@ -473,7 +359,7 @@ static void read_index_info(int line_termination)
 }
 
 static const char update_index_usage[] =
-"git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--ignore-missing] [-z] [--verbose] [--] <file>...";
+"git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again] [--ignore-missing] [-z] [--verbose] [--] <file>...";
 
 static unsigned char head_sha1[20];
 static unsigned char merge_head_sha1[20];
@@ -488,11 +374,13 @@ static struct cache_entry *read_one_ent(const char *which,
        struct cache_entry *ce;
 
        if (get_tree_entry(ent, path, sha1, &mode)) {
-               error("%s: not in %s branch.", path, which);
+               if (which)
+                       error("%s: not in %s branch.", path, which);
                return NULL;
        }
        if (mode == S_IFDIR) {
-               error("%s: not a blob in %s branch.", path, which);
+               if (which)
+                       error("%s: not a blob in %s branch.", path, which);
                return NULL;
        }
        size = cache_entry_size(namelen);
@@ -576,7 +464,8 @@ static void read_head_pointers(void)
        }
 }
 
-static int do_unresolve(int ac, const char **av)
+static int do_unresolve(int ac, const char **av,
+                       const char *prefix, int prefix_length)
 {
        int i;
        int err = 0;
@@ -588,11 +477,57 @@ static int do_unresolve(int ac, const char **av)
 
        for (i = 1; i < ac; i++) {
                const char *arg = av[i];
-               err |= unresolve_one(arg);
+               const char *p = prefix_path(prefix, prefix_length, arg);
+               err |= unresolve_one(p);
+               if (p < arg || p > arg + strlen(arg))
+                       free((char*)p);
        }
        return err;
 }
 
+static int do_reupdate(int ac, const char **av,
+                      const char *prefix, int prefix_length)
+{
+       /* Read HEAD and run update-index on paths that are
+        * merged and already different between index and HEAD.
+        */
+       int pos;
+       int has_head = 1;
+       const char **pathspec = get_pathspec(prefix, av + 1);
+
+       if (read_ref(git_path("HEAD"), head_sha1))
+               /* If there is no HEAD, that means it is an initial
+                * commit.  Update everything in the index.
+                */
+               has_head = 0;
+ redo:
+       for (pos = 0; pos < active_nr; pos++) {
+               struct cache_entry *ce = active_cache[pos];
+               struct cache_entry *old = NULL;
+               int save_nr;
+
+               if (ce_stage(ce) || !ce_path_match(ce, pathspec))
+                       continue;
+               if (has_head)
+                       old = read_one_ent(NULL, head_sha1,
+                                          ce->name, ce_namelen(ce), 0);
+               if (old && ce->ce_mode == old->ce_mode &&
+                   !memcmp(ce->sha1, old->sha1, 20)) {
+                       free(old);
+                       continue; /* unchanged */
+               }
+               /* Be careful.  The working tree may not have the
+                * path anymore, in which case, under 'allow_remove',
+                * or worse yet 'allow_replace', active_nr may decrease.
+                */
+               save_nr = active_nr;
+               update_one(ce->name + prefix_length, prefix, prefix_length);
+               if (save_nr != active_nr)
+                       goto redo;
+       }
+       return 0;
+}
+
 int main(int argc, const char **argv)
 {
        int i, newfd, entries, has_errors = 0, line_termination = '\n';
@@ -601,6 +536,7 @@ int main(int argc, const char **argv)
        const char *prefix = setup_git_directory();
        int prefix_length = prefix ? strlen(prefix) : 0;
        char set_executable_bit = 0;
+       unsigned int refresh_flags = 0;
 
        git_config(git_default_config);
 
@@ -621,7 +557,7 @@ int main(int argc, const char **argv)
                                continue;
                        }
                        if (!strcmp(path, "-q")) {
-                               quiet = 1;
+                               refresh_flags |= REFRESH_QUIET;
                                continue;
                        }
                        if (!strcmp(path, "--add")) {
@@ -637,15 +573,15 @@ int main(int argc, const char **argv)
                                continue;
                        }
                        if (!strcmp(path, "--unmerged")) {
-                               allow_unmerged = 1;
+                               refresh_flags |= REFRESH_UNMERGED;
                                continue;
                        }
                        if (!strcmp(path, "--refresh")) {
-                               has_errors |= refresh_cache(0);
+                               has_errors |= refresh_cache(refresh_flags);
                                continue;
                        }
                        if (!strcmp(path, "--really-refresh")) {
-                               has_errors |= refresh_cache(1);
+                               has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
                                continue;
                        }
                        if (!strcmp(path, "--cacheinfo")) {
@@ -704,13 +640,21 @@ int main(int argc, const char **argv)
                                break;
                        }
                        if (!strcmp(path, "--unresolve")) {
-                               has_errors = do_unresolve(argc - i, argv + i);
+                               has_errors = do_unresolve(argc - i, argv + i,
+                                                         prefix, prefix_length);
+                               if (has_errors)
+                                       active_cache_changed = 0;
+                               goto finish;
+                       }
+                       if (!strcmp(path, "--again")) {
+                               has_errors = do_reupdate(argc - i, argv + i,
+                                                        prefix, prefix_length);
                                if (has_errors)
                                        active_cache_changed = 0;
                                goto finish;
                        }
                        if (!strcmp(path, "--ignore-missing")) {
-                               not_new = 1;
+                               refresh_flags |= REFRESH_IGNORE_MISSING;
                                continue;
                        }
                        if (!strcmp(path, "--verbose")) {
@@ -730,6 +674,7 @@ int main(int argc, const char **argv)
                strbuf_init(&buf);
                while (1) {
                        char *path_name;
+                       const char *p;
                        read_line(&buf, stdin, line_termination);
                        if (buf.eof)
                                break;
@@ -737,11 +682,12 @@ int main(int argc, const char **argv)
                                path_name = unquote_c_style(buf.buf, NULL);
                        else
                                path_name = buf.buf;
-                       update_one(path_name, prefix, prefix_length);
-                       if (set_executable_bit) {
-                               const char *p = prefix_path(prefix, prefix_length, path_name);
+                       p = prefix_path(prefix, prefix_length, path_name);
+                       update_one(p, NULL, 0);
+                       if (set_executable_bit)
                                chmod_path(set_executable_bit, p);
-                       }
+                       if (p < path_name || p > path_name + strlen(path_name))
+                               free((char*) p);
                        if (path_name != buf.buf)
                                free(path_name);
                }