merge-recursive: don't segfault while handling rename clashes
[gitweb.git] / builtin-rm.c
index abdab7f001587e819aecb5c5f7e8dcbb10a5dd48..c11f45585825962e61bdee4bdd6df206f0a141c6 100644 (file)
@@ -11,7 +11,7 @@
 #include "parse-options.h"
 
 static const char * const builtin_rm_usage[] = {
-       "git-rm [options] [--] <file>...",
+       "git rm [options] [--] <file>...",
        NULL
 };
 
@@ -29,29 +29,10 @@ static void add_list(const char *name)
        list.name[list.nr++] = name;
 }
 
-static int remove_file(const char *name)
-{
-       int ret;
-       char *slash;
-
-       ret = unlink(name);
-       if (ret && errno == ENOENT)
-               /* The user has removed it from the filesystem by hand */
-               ret = errno = 0;
-
-       if (!ret && (slash = strrchr(name, '/'))) {
-               char *n = xstrdup(name);
-               do {
-                       n[slash - name] = 0;
-                       name = n;
-               } while (!rmdir(name) && (slash = strrchr(name, '/')));
-       }
-       return ret;
-}
-
 static int check_local_mod(unsigned char *head, int index_only)
 {
-       /* items in list are already sorted in the cache order,
+       /*
+        * Items in list are already sorted in the cache order,
         * so we could do this a lot more efficiently by using
         * tree_desc based traversal if we wanted to, but I am
         * lazy, and who cares if removal of files is a tad
@@ -91,24 +72,55 @@ static int check_local_mod(unsigned char *head, int index_only)
                         */
                        continue;
                }
+
+               /*
+                * "rm" of a path that has changes need to be treated
+                * carefully not to allow losing local changes
+                * accidentally.  A local change could be (1) file in
+                * work tree is different since the index; and/or (2)
+                * the user staged a content that is different from
+                * the current commit in the index.
+                *
+                * In such a case, you would need to --force the
+                * removal.  However, "rm --cached" (remove only from
+                * the index) is safe if the index matches the file in
+                * the work tree or the HEAD commit, as it means that
+                * the content being removed is available elsewhere.
+                */
+
+               /*
+                * Is the index different from the file in the work tree?
+                */
                if (ce_match_stat(ce, &st, 0))
                        local_changes = 1;
+
+               /*
+                * Is the index different from the HEAD commit?  By
+                * definition, before the very initial commit,
+                * anything staged in the index is treated by the same
+                * way as changed from the HEAD.
+                */
                if (no_head
                     || get_tree_entry(head, name, sha1, &mode)
                     || ce->ce_mode != create_ce_mode(mode)
                     || hashcmp(ce->sha1, sha1))
                        staged_changes = 1;
 
-               if (local_changes && staged_changes)
-                       errs = error("'%s' has staged content different "
-                                    "from both the file and the HEAD\n"
-                                    "(use -f to force removal)", name);
+               /*
+                * If the index does not match the file in the work
+                * tree and if it does not match the HEAD commit
+                * either, (1) "git rm" without --cached definitely
+                * will lose information; (2) "git rm --cached" will
+                * lose information unless it is about removing an
+                * "intent to add" entry.
+                */
+               if (local_changes && staged_changes) {
+                       if (!index_only || !(ce->ce_flags & CE_INTENT_TO_ADD))
+                               errs = error("'%s' has staged content different "
+                                            "from both the file and the HEAD\n"
+                                            "(use -f to force removal)", name);
+               }
                else if (!index_only) {
-                       /* It's not dangerous to git-rm --cached a
-                        * file if the index matches the file or the
-                        * HEAD, since it means the deleted content is
-                        * still available somewhere.
-                        */
                        if (staged_changes)
                                errs = error("'%s' has changes staged in the index\n"
                                             "(use --cached to keep the file, "
@@ -131,7 +143,7 @@ static struct option builtin_rm_options[] = {
        OPT__DRY_RUN(&show_only),
        OPT__QUIET(&quiet),
        OPT_BOOLEAN( 0 , "cached",         &index_only, "only remove from the index"),
-       OPT_BOOLEAN('f', NULL,             &force,      "override the up-to-date check"),
+       OPT_BOOLEAN('f', "force",          &force,      "override the up-to-date check"),
        OPT_BOOLEAN('r', NULL,             &recursive,  "allow recursive removal"),
        OPT_BOOLEAN( 0 , "ignore-unmatch", &ignore_unmatch,
                                "exit with a zero status even if nothing matched"),
@@ -157,6 +169,7 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
 
        if (read_cache() < 0)
                die("index file corrupt");
+       refresh_cache(REFRESH_QUIET);
 
        pathspec = get_pathspec(prefix, argv);
        seen = NULL;
@@ -221,7 +234,7 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
                        printf("rm '%s'\n", path);
 
                if (remove_file_from_cache(path))
-                       die("git-rm: unable to remove %s", path);
+                       die("git rm: unable to remove %s", path);
        }
 
        if (show_only)
@@ -239,12 +252,12 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
                int removed = 0;
                for (i = 0; i < list.nr; i++) {
                        const char *path = list.name[i];
-                       if (!remove_file(path)) {
+                       if (!remove_path(path)) {
                                removed = 1;
                                continue;
                        }
                        if (!removed)
-                               die("git-rm: %s: %s", path, strerror(errno));
+                               die("git rm: %s: %s", path, strerror(errno));
                }
        }