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![Junio C Hamano](/assets/img/avatar_default.png)
When defined, this allows plumbing commands that update the index (add, apply, checkout-index, merge-recursive, mv, read-tree, rm, update-index, and write-tree) to write their resulting index to an alternative index file while holding a lock to the original index file. With this, git-commit that jumps the index does not have to make an extra copy of the index file, and more importantly, it can do the update while holding the lock on the index. However, I think the interface to let an environment variable specify the output is a mistake, as shown in the documentation. If a curious user has the environment variable set to something other than the file GIT_INDEX_FILE points at, almost everything will break. This should instead be a command line parameter to tell these plumbing commands to write the result in the named file, to prevent stupid mistakes. Signed-off-by: Junio C Hamano <junkio@cox.net>
229 lines
5.3 KiB
C
229 lines
5.3 KiB
C
/*
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* "git rm" builtin command
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*
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* Copyright (C) Linus Torvalds 2006
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "dir.h"
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#include "cache-tree.h"
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#include "tree-walk.h"
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static const char builtin_rm_usage[] =
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"git-rm [-f] [-n] [-r] [--cached] [--] <file>...";
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static struct {
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int nr, alloc;
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const char **name;
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} list;
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static void add_list(const char *name)
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{
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if (list.nr >= list.alloc) {
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list.alloc = alloc_nr(list.alloc);
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list.name = xrealloc(list.name, list.alloc * sizeof(const char *));
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}
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list.name[list.nr++] = name;
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}
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static int remove_file(const char *name)
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{
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int ret;
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char *slash;
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ret = unlink(name);
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if (ret && errno == ENOENT)
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/* The user has removed it from the filesystem by hand */
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ret = errno = 0;
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if (!ret && (slash = strrchr(name, '/'))) {
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char *n = xstrdup(name);
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do {
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n[slash - name] = 0;
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name = n;
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} while (!rmdir(name) && (slash = strrchr(name, '/')));
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}
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return ret;
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}
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static int check_local_mod(unsigned char *head)
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{
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/* items in list are already sorted in the cache order,
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* so we could do this a lot more efficiently by using
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* tree_desc based traversal if we wanted to, but I am
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* lazy, and who cares if removal of files is a tad
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* slower than the theoretical maximum speed?
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*/
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int i, no_head;
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int errs = 0;
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no_head = is_null_sha1(head);
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for (i = 0; i < list.nr; i++) {
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struct stat st;
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int pos;
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struct cache_entry *ce;
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const char *name = list.name[i];
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unsigned char sha1[20];
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unsigned mode;
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pos = cache_name_pos(name, strlen(name));
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if (pos < 0)
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continue; /* removing unmerged entry */
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ce = active_cache[pos];
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if (lstat(ce->name, &st) < 0) {
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if (errno != ENOENT)
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fprintf(stderr, "warning: '%s': %s",
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ce->name, strerror(errno));
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/* It already vanished from the working tree */
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continue;
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}
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else if (S_ISDIR(st.st_mode)) {
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/* if a file was removed and it is now a
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* directory, that is the same as ENOENT as
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* far as git is concerned; we do not track
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* directories.
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*/
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continue;
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}
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if (ce_match_stat(ce, &st, 0))
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errs = error("'%s' has local modifications "
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"(hint: try -f)", ce->name);
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if (no_head
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|| get_tree_entry(head, name, sha1, &mode)
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|| ce->ce_mode != create_ce_mode(mode)
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|| hashcmp(ce->sha1, sha1))
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errs = error("'%s' has changes staged in the index "
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"(hint: try -f)", name);
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}
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return errs;
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}
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static struct lock_file lock_file;
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int cmd_rm(int argc, const char **argv, const char *prefix)
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{
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int i, newfd;
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int show_only = 0, force = 0, index_only = 0, recursive = 0;
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const char **pathspec;
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char *seen;
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git_config(git_default_config);
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newfd = hold_locked_index(&lock_file, 1);
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if (read_cache() < 0)
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die("index file corrupt");
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for (i = 1 ; i < argc ; i++) {
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const char *arg = argv[i];
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if (*arg != '-')
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break;
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else if (!strcmp(arg, "--")) {
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i++;
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break;
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}
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else if (!strcmp(arg, "-n"))
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show_only = 1;
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else if (!strcmp(arg, "--cached"))
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index_only = 1;
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else if (!strcmp(arg, "-f"))
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force = 1;
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else if (!strcmp(arg, "-r"))
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recursive = 1;
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else
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usage(builtin_rm_usage);
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}
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if (argc <= i)
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usage(builtin_rm_usage);
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pathspec = get_pathspec(prefix, argv + i);
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seen = NULL;
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for (i = 0; pathspec[i] ; i++)
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/* nothing */;
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seen = xcalloc(i, 1);
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for (i = 0; i < active_nr; i++) {
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struct cache_entry *ce = active_cache[i];
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if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
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continue;
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add_list(ce->name);
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}
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if (pathspec) {
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const char *match;
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for (i = 0; (match = pathspec[i]) != NULL ; i++) {
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if (!seen[i])
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die("pathspec '%s' did not match any files",
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match);
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if (!recursive && seen[i] == MATCHED_RECURSIVELY)
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die("not removing '%s' recursively without -r",
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*match ? match : ".");
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}
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}
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/*
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* If not forced, the file, the index and the HEAD (if exists)
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* must match; but the file can already been removed, since
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* this sequence is a natural "novice" way:
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*
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* rm F; git fm F
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*
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* Further, if HEAD commit exists, "diff-index --cached" must
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* report no changes unless forced.
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*/
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if (!force) {
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unsigned char sha1[20];
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if (get_sha1("HEAD", sha1))
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hashclr(sha1);
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if (check_local_mod(sha1))
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exit(1);
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}
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/*
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* First remove the names from the index: we won't commit
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* the index unless all of them succeed.
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*/
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for (i = 0; i < list.nr; i++) {
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const char *path = list.name[i];
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printf("rm '%s'\n", path);
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if (remove_file_from_cache(path))
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die("git-rm: unable to remove %s", path);
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cache_tree_invalidate_path(active_cache_tree, path);
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}
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if (show_only)
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return 0;
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/*
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* Then, unless we used "--cached", remove the filenames from
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* the workspace. If we fail to remove the first one, we
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* abort the "git rm" (but once we've successfully removed
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* any file at all, we'll go ahead and commit to it all:
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* by then we've already committed ourselves and can't fail
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* in the middle)
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*/
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if (!index_only) {
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int removed = 0;
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for (i = 0; i < list.nr; i++) {
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const char *path = list.name[i];
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if (!remove_file(path)) {
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removed = 1;
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continue;
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}
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if (!removed)
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die("git-rm: %s: %s", path, strerror(errno));
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}
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}
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if (active_cache_changed) {
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if (write_cache(newfd, active_cache, active_nr) ||
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close(newfd) || commit_locked_index(&lock_file))
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die("Unable to write new index file");
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}
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return 0;
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}
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