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tag: v1.5.2.1
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/*
* "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"

static const char builtin_rm_usage[] =
"git-rm [-f] [-n] [-r] [--cached] [--ignore-unmatch] [--quiet] [--] <file>...";

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 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)
{
/* 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;

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)
fprintf(stderr, "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;
}
if (ce_match_stat(ce, &st, 0))
errs = error("'%s' has local modifications "
"(hint: try -f)", ce->name);
if (no_head
|| get_tree_entry(head, name, sha1, &mode)
|| ce->ce_mode != create_ce_mode(mode)
|| hashcmp(ce->sha1, sha1))
errs = error("'%s' has changes staged in the index "
"(hint: try -f)", name);
}
return errs;
}

static struct lock_file lock_file;

int cmd_rm(int argc, const char **argv, const char *prefix)
{
int i, newfd;
int show_only = 0, force = 0, index_only = 0, recursive = 0, quiet = 0;
int ignore_unmatch = 0;
const char **pathspec;
char *seen;

git_config(git_default_config);

newfd = hold_locked_index(&lock_file, 1);

if (read_cache() < 0)
die("index file corrupt");

for (i = 1 ; i < argc ; i++) {
const char *arg = argv[i];

if (*arg != '-')
break;
else if (!strcmp(arg, "--")) {
i++;
break;
}
else if (!strcmp(arg, "-n"))
show_only = 1;
else if (!strcmp(arg, "--cached"))
index_only = 1;
else if (!strcmp(arg, "-f"))
force = 1;
else if (!strcmp(arg, "-r"))
recursive = 1;
else if (!strcmp(arg, "--quiet"))
quiet = 1;
else if (!strcmp(arg, "--ignore-unmatch"))
ignore_unmatch = 1;
else
usage(builtin_rm_usage);
}
if (argc <= i)
usage(builtin_rm_usage);

pathspec = get_pathspec(prefix, argv + i);
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))
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);
cache_tree_invalidate_path(active_cache_tree, 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_file(path)) {
removed = 1;
continue;
}
if (!removed)
die("git-rm: %s: %s", path, strerror(errno));
}
}

if (active_cache_changed) {
if (write_cache(newfd, active_cache, active_nr) ||
close(newfd) || commit_locked_index(&lock_file))
die("Unable to write new index file");
}

return 0;
}
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