1 files changed, 272 insertions, 0 deletions
diff --git a/builtin/rm.c b/builtin/rm.c
new file mode 100644
index 000000000..f3772c84d
--- /dev/null
+++ b/builtin/rm.c
@@ -0,0 +1,272 @@
+/*
+ * "git rm" builtin command
+ *
+ * Copyright (C) Linus Torvalds 2006
+ */
+#include "cache.h"
+#include "builtin.h"
+#include "dir.h"
+#include "cache-tree.h"
+#include "tree-walk.h"
+#include "parse-options.h"
+
+static const char * const builtin_rm_usage[] = {
+	"git rm [options] [--] <file>...",
+	NULL
+};
+
+static struct {
+	int nr, alloc;
+	const char **name;
+} list;
+
+static void add_list(const char *name)
+{
+	if (list.nr >= list.alloc) {
+		list.alloc = alloc_nr(list.alloc);
+		list.name = xrealloc(list.name, list.alloc * sizeof(const char *));
+	}
+	list.name[list.nr++] = name;
+}
+
+static int check_local_mod(unsigned char *head, int index_only)
+{
+	/*
+	 * 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
+	 * slower than the theoretical maximum speed?
+	 */
+	int i, no_head;
+	int errs = 0;
+
+	no_head = is_null_sha1(head);
+	for (i = 0; i < list.nr; i++) {
+		struct stat st;
+		int pos;
+		struct cache_entry *ce;
+		const char *name = list.name[i];
+		unsigned char sha1[20];
+		unsigned mode;
+		int local_changes = 0;
+		int staged_changes = 0;
+
+		pos = cache_name_pos(name, strlen(name));
+		if (pos < 0)
+			continue; /* removing unmerged entry */
+		ce = active_cache[pos];
+
+		if (lstat(ce->name, &st) < 0) {
+			if (errno != ENOENT)
+				warning("'%s': %s", ce->name, strerror(errno));
+			/* It already vanished from the working tree */
+			continue;
+		}
+		else if (S_ISDIR(st.st_mode)) {
+			/* if a file was removed and it is now a
+			 * directory, that is the same as ENOENT as
+			 * far as git is concerned; we do not track
+			 * directories.
+			 */
+			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 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) {
+			if (staged_changes)
+				errs = error("'%s' has changes staged in the index\n"
+					     "(use --cached to keep the file, "
+					     "or -f to force removal)", name);
+			if (local_changes)
+				errs = error("'%s' has local modifications\n"
+					     "(use --cached to keep the file, "
+					     "or -f to force removal)", name);
+		}
+	}
+	return errs;
+}
+
+static struct lock_file lock_file;
+
+static int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
+static int ignore_unmatch = 0;
+
+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', "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"),
+	OPT_END(),
+};
+
+int cmd_rm(int argc, const char **argv, const char *prefix)
+{
+	int i, newfd;
+	const char **pathspec;
+	char *seen;
+
+	git_config(git_default_config, NULL);
+
+	argc = parse_options(argc, argv, prefix, builtin_rm_options,
+			     builtin_rm_usage, 0);
+	if (!argc)
+		usage_with_options(builtin_rm_usage, builtin_rm_options);
+
+	if (!index_only)
+		setup_work_tree();
+
+	newfd = hold_locked_index(&lock_file, 1);
+
+	if (read_cache() < 0)
+		die("index file corrupt");
+
+	pathspec = get_pathspec(prefix, argv);
+	refresh_index(&the_index, REFRESH_QUIET, pathspec, NULL, NULL);
+
+	seen = NULL;
+	for (i = 0; pathspec[i] ; i++)
+		/* nothing */;
+	seen = xcalloc(i, 1);
+
+	for (i = 0; i < active_nr; i++) {
+		struct cache_entry *ce = active_cache[i];
+		if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
+			continue;
+		add_list(ce->name);
+	}
+
+	if (pathspec) {
+		const char *match;
+		int seen_any = 0;
+		for (i = 0; (match = pathspec[i]) != NULL ; i++) {
+			if (!seen[i]) {
+				if (!ignore_unmatch) {
+					die("pathspec '%s' did not match any files",
+					    match);
+				}
+			}
+			else {
+				seen_any = 1;
+			}
+			if (!recursive && seen[i] == MATCHED_RECURSIVELY)
+				die("not removing '%s' recursively without -r",
+				    *match ? match : ".");
+		}
+
+		if (! seen_any)
+			exit(0);
+	}
+
+	/*
+	 * If not forced, the file, the index and the HEAD (if exists)
+	 * must match; but the file can already been removed, since
+	 * this sequence is a natural "novice" way:
+	 *
+	 *	rm F; git rm F
+	 *
+	 * Further, if HEAD commit exists, "diff-index --cached" must
+	 * report no changes unless forced.
+	 */
+	if (!force) {
+		unsigned char sha1[20];
+		if (get_sha1("HEAD", sha1))
+			hashclr(sha1);
+		if (check_local_mod(sha1, index_only))
+			exit(1);
+	}
+
+	/*
+	 * First remove the names from the index: we won't commit
+	 * the index unless all of them succeed.
+	 */
+	for (i = 0; i < list.nr; i++) {
+		const char *path = list.name[i];
+		if (!quiet)
+			printf("rm '%s'\n", path);
+
+		if (remove_file_from_cache(path))
+			die("git rm: unable to remove %s", path);
+	}
+
+	if (show_only)
+		return 0;
+
+	/*
+	 * Then, unless we used "--cached", remove the filenames from
+	 * the workspace. If we fail to remove the first one, we
+	 * abort the "git rm" (but once we've successfully removed
+	 * any file at all, we'll go ahead and commit to it all:
+	 * by then we've already committed ourselves and can't fail
+	 * in the middle)
+	 */
+	if (!index_only) {
+		int removed = 0;
+		for (i = 0; i < list.nr; i++) {
+			const char *path = list.name[i];
+			if (!remove_path(path)) {
+				removed = 1;
+				continue;
+			}
+			if (!removed)
+				die_errno("git rm: '%s'", path);
+		}
+	}
+
+	if (active_cache_changed) {
+		if (write_cache(newfd, active_cache, active_nr) ||
+		    commit_locked_index(&lock_file))
+			die("Unable to write new index file");
+	}
+
+	return 0;
+}