/*
* "check_good_are_ancestors_of_bad" checks that all "good" revs are
* ancestor of the "bad" rev.
*
* If that's not the case, we need to check the merge bases.
* If a merge base must be tested by the user, its source code will be
* checked out to be tested by the user and we will exit.
*/
static void check_good_are_ancestors_of_bad(const char *prefix, int no_checkout)
{
char *filename = git_pathdup("BISECT_ANCESTORS_OK");
struct stat st;
int fd;
if (!current_bad_oid)
die("a %s revision is needed", term_bad);
/* Check if file BISECT_ANCESTORS_OK exists. */
if (!stat(filename, &st) && S_ISREG(st.st_mode))
goto done;
/* Bisecting with no good rev is ok. */
if (good_revs.nr == 0)
goto done;
/* Check if all good revs are ancestor of the bad rev. */
if (check_ancestors(prefix))
check_merge_bases(no_checkout);
/* Create file BISECT_ANCESTORS_OK. */
fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600);
if (fd < 0)
warning_errno("could not create file '%s'",
filename);
else
close(fd);
done:
free(filename);
}
static int serve_cache_loop(int fd)
{
struct pollfd pfd;
timestamp_t wakeup;
wakeup = check_expirations();
if (!wakeup)
return 0;
pfd.fd = fd;
pfd.events = POLLIN;
if (poll(&pfd, 1, 1000 * wakeup) < 0) {
if (errno != EINTR)
die_errno("poll failed");
return 1;
}
if (pfd.revents & POLLIN) {
int client, client2;
FILE *in, *out;
client = accept(fd, NULL, NULL);
if (client < 0) {
warning_errno("accept failed");
return 1;
}
client2 = dup(client);
if (client2 < 0) {
warning_errno("dup failed");
close(client);
return 1;
}
in = xfdopen(client, "r");
out = xfdopen(client2, "w");
serve_one_client(in, out);
fclose(in);
fclose(out);
}
return 1;
}
static int add_mailname_host(struct strbuf *buf)
{
FILE *mailname;
struct strbuf mailnamebuf = STRBUF_INIT;
mailname = fopen("/etc/mailname", "r");
if (!mailname) {
if (errno != ENOENT)
warning_errno("cannot open /etc/mailname");
return -1;
}
if (strbuf_getline(&mailnamebuf, mailname) == EOF) {
if (ferror(mailname))
warning_errno("cannot read /etc/mailname");
strbuf_release(&mailnamebuf);
fclose(mailname);
return -1;
}
/* success! */
strbuf_addbuf(buf, &mailnamebuf);
strbuf_release(&mailnamebuf);
fclose(mailname);
return 0;
}
static void add_domainname(struct strbuf *out, int *is_bogus)
{
char buf[1024];
if (gethostname(buf, sizeof(buf))) {
warning_errno("cannot get host name");
strbuf_addstr(out, "(none)");
*is_bogus = 1;
return;
}
if (strchr(buf, '.'))
strbuf_addstr(out, buf);
else if (canonical_name(buf, out) < 0) {
strbuf_addf(out, "%s.(none)", buf);
*is_bogus = 1;
}
}
/*
* Find the conflict identified by "id"; the change between its
* "preimage" (i.e. a previous contents with conflict markers) and its
* "postimage" (i.e. the corresponding contents with conflicts
* resolved) may apply cleanly to the contents stored in "path", i.e.
* the conflict this time around.
*
* Returns 0 for successful replay of recorded resolution, or non-zero
* for failure.
*/
static int merge(const struct rerere_id *id, const char *path)
{
FILE *f;
int ret;
mmfile_t cur = {NULL, 0};
mmbuffer_t result = {NULL, 0};
/*
* Normalize the conflicts in path and write it out to
* "thisimage" temporary file.
*/
if ((handle_file(path, NULL, rerere_path(id, "thisimage")) < 0) ||
read_mmfile(&cur, rerere_path(id, "thisimage"))) {
ret = 1;
goto out;
}
ret = try_merge(id, path, &cur, &result);
if (ret)
goto out;
/*
* A successful replay of recorded resolution.
* Mark that "postimage" was used to help gc.
*/
if (utime(rerere_path(id, "postimage"), NULL) < 0)
warning_errno(_("failed utime() on '%s'"),
rerere_path(id, "postimage"));
/* Update "path" with the resolution */
f = fopen(path, "w");
if (!f)
return error_errno(_("could not open '%s'"), path);
if (fwrite(result.ptr, result.size, 1, f) != 1)
error_errno(_("could not write '%s'"), path);
if (fclose(f))
return error_errno(_("writing '%s' failed"), path);
out:
free(cur.ptr);
free(result.ptr);
return ret;
}
/*
* Reads a file that was presumably written by a shell script, i.e. with an
* end-of-line marker that needs to be stripped.
*
* Note that only the last end-of-line marker is stripped, consistent with the
* behavior of "$(cat path)" in a shell script.
*
* Returns 1 if the file was read, 0 if it could not be read or does not exist.
*/
static int read_oneliner(struct strbuf *buf,
const char *path, int skip_if_empty)
{
int orig_len = buf->len;
if (!file_exists(path))
return 0;
if (strbuf_read_file(buf, path, 0) < 0) {
warning_errno(_("could not read '%s'"), path);
return 0;
}
if (buf->len > orig_len && buf->buf[buf->len - 1] == '\n') {
if (--buf->len > orig_len && buf->buf[buf->len - 1] == '\r')
--buf->len;
buf->buf[buf->len] = '\0';
}
if (skip_if_empty && buf->len == orig_len)
return 0;
return 1;
}
static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
int argc, const char **argv)
{
char tmpdir[PATH_MAX];
struct strbuf info = STRBUF_INIT, lpath = STRBUF_INIT;
struct strbuf rpath = STRBUF_INIT, buf = STRBUF_INIT;
struct strbuf ldir = STRBUF_INIT, rdir = STRBUF_INIT;
struct strbuf wtdir = STRBUF_INIT;
char *lbase_dir, *rbase_dir;
size_t ldir_len, rdir_len, wtdir_len;
const char *workdir, *tmp;
int ret = 0, i;
FILE *fp;
struct hashmap working_tree_dups, submodules, symlinks2;
struct hashmap_iter iter;
struct pair_entry *entry;
struct index_state wtindex;
struct checkout lstate, rstate;
int rc, flags = RUN_GIT_CMD, err = 0;
struct child_process child = CHILD_PROCESS_INIT;
const char *helper_argv[] = { "difftool--helper", NULL, NULL, NULL };
struct hashmap wt_modified, tmp_modified;
int indices_loaded = 0;
workdir = get_git_work_tree();
/* Setup temp directories */
tmp = getenv("TMPDIR");
xsnprintf(tmpdir, sizeof(tmpdir), "%s/git-difftool.XXXXXX", tmp ? tmp : "/tmp");
if (!mkdtemp(tmpdir))
return error("could not create '%s'", tmpdir);
strbuf_addf(&ldir, "%s/left/", tmpdir);
strbuf_addf(&rdir, "%s/right/", tmpdir);
strbuf_addstr(&wtdir, workdir);
if (!wtdir.len || !is_dir_sep(wtdir.buf[wtdir.len - 1]))
strbuf_addch(&wtdir, '/');
mkdir(ldir.buf, 0700);
mkdir(rdir.buf, 0700);
memset(&wtindex, 0, sizeof(wtindex));
memset(&lstate, 0, sizeof(lstate));
lstate.base_dir = lbase_dir = xstrdup(ldir.buf);
lstate.base_dir_len = ldir.len;
lstate.force = 1;
memset(&rstate, 0, sizeof(rstate));
rstate.base_dir = rbase_dir = xstrdup(rdir.buf);
rstate.base_dir_len = rdir.len;
rstate.force = 1;
ldir_len = ldir.len;
rdir_len = rdir.len;
wtdir_len = wtdir.len;
hashmap_init(&working_tree_dups,
(hashmap_cmp_fn)working_tree_entry_cmp, NULL, 0);
hashmap_init(&submodules, (hashmap_cmp_fn)pair_cmp, NULL, 0);
hashmap_init(&symlinks2, (hashmap_cmp_fn)pair_cmp, NULL, 0);
child.no_stdin = 1;
child.git_cmd = 1;
child.use_shell = 0;
child.clean_on_exit = 1;
child.dir = prefix;
child.out = -1;
argv_array_pushl(&child.args, "diff", "--raw", "--no-abbrev", "-z",
NULL);
for (i = 0; i < argc; i++)
argv_array_push(&child.args, argv[i]);
if (start_command(&child))
die("could not obtain raw diff");
fp = xfdopen(child.out, "r");
/* Build index info for left and right sides of the diff */
i = 0;
while (!strbuf_getline_nul(&info, fp)) {
int lmode, rmode;
struct object_id loid, roid;
char status;
const char *src_path, *dst_path;
if (starts_with(info.buf, "::"))
die(N_("combined diff formats('-c' and '--cc') are "
"not supported in\n"
"directory diff mode('-d' and '--dir-diff')."));
if (parse_index_info(info.buf, &lmode, &rmode, &loid, &roid,
&status))
break;
if (strbuf_getline_nul(&lpath, fp))
break;
src_path = lpath.buf;
i++;
if (status != 'C' && status != 'R') {
dst_path = src_path;
} else {
if (strbuf_getline_nul(&rpath, fp))
break;
dst_path = rpath.buf;
}
if (S_ISGITLINK(lmode) || S_ISGITLINK(rmode)) {
strbuf_reset(&buf);
strbuf_addf(&buf, "Subproject commit %s",
oid_to_hex(&loid));
add_left_or_right(&submodules, src_path, buf.buf, 0);
strbuf_reset(&buf);
strbuf_addf(&buf, "Subproject commit %s",
oid_to_hex(&roid));
if (!oidcmp(&loid, &roid))
strbuf_addstr(&buf, "-dirty");
add_left_or_right(&submodules, dst_path, buf.buf, 1);
continue;
}
if (S_ISLNK(lmode)) {
char *content = get_symlink(&loid, src_path);
add_left_or_right(&symlinks2, src_path, content, 0);
free(content);
}
if (S_ISLNK(rmode)) {
char *content = get_symlink(&roid, dst_path);
add_left_or_right(&symlinks2, dst_path, content, 1);
free(content);
}
if (lmode && status != 'C') {
if (checkout_path(lmode, &loid, src_path, &lstate)) {
ret = error("could not write '%s'", src_path);
goto finish;
}
}
if (rmode && !S_ISLNK(rmode)) {
struct working_tree_entry *entry;
/* Avoid duplicate working_tree entries */
FLEX_ALLOC_STR(entry, path, dst_path);
hashmap_entry_init(entry, strhash(dst_path));
if (hashmap_get(&working_tree_dups, entry, NULL)) {
free(entry);
continue;
}
hashmap_add(&working_tree_dups, entry);
if (!use_wt_file(workdir, dst_path, &roid)) {
if (checkout_path(rmode, &roid, dst_path,
&rstate)) {
ret = error("could not write '%s'",
dst_path);
goto finish;
}
} else if (!is_null_oid(&roid)) {
/*
* Changes in the working tree need special
* treatment since they are not part of the
* index.
*/
struct cache_entry *ce2 =
make_cache_entry(rmode, roid.hash,
dst_path, 0, 0);
add_index_entry(&wtindex, ce2,
ADD_CACHE_JUST_APPEND);
add_path(&rdir, rdir_len, dst_path);
if (ensure_leading_directories(rdir.buf)) {
ret = error("could not create "
"directory for '%s'",
dst_path);
goto finish;
}
add_path(&wtdir, wtdir_len, dst_path);
if (symlinks) {
if (symlink(wtdir.buf, rdir.buf)) {
ret = error_errno("could not symlink '%s' to '%s'", wtdir.buf, rdir.buf);
goto finish;
}
} else {
struct stat st;
if (stat(wtdir.buf, &st))
st.st_mode = 0644;
if (copy_file(rdir.buf, wtdir.buf,
st.st_mode)) {
ret = error("could not copy '%s' to '%s'", wtdir.buf, rdir.buf);
goto finish;
}
}
}
}
}
fclose(fp);
fp = NULL;
if (finish_command(&child)) {
ret = error("error occurred running diff --raw");
goto finish;
}
if (!i)
goto finish;
/*
* Changes to submodules require special treatment.This loop writes a
* temporary file to both the left and right directories to show the
* change in the recorded SHA1 for the submodule.
*/
hashmap_iter_init(&submodules, &iter);
while ((entry = hashmap_iter_next(&iter))) {
if (*entry->left) {
add_path(&ldir, ldir_len, entry->path);
ensure_leading_directories(ldir.buf);
write_file(ldir.buf, "%s", entry->left);
}
if (*entry->right) {
add_path(&rdir, rdir_len, entry->path);
ensure_leading_directories(rdir.buf);
write_file(rdir.buf, "%s", entry->right);
}
}
/*
* Symbolic links require special treatment.The standard "git diff"
* shows only the link itself, not the contents of the link target.
* This loop replicates that behavior.
*/
hashmap_iter_init(&symlinks2, &iter);
while ((entry = hashmap_iter_next(&iter))) {
if (*entry->left) {
add_path(&ldir, ldir_len, entry->path);
ensure_leading_directories(ldir.buf);
write_file(ldir.buf, "%s", entry->left);
}
if (*entry->right) {
add_path(&rdir, rdir_len, entry->path);
ensure_leading_directories(rdir.buf);
write_file(rdir.buf, "%s", entry->right);
}
}
strbuf_release(&buf);
strbuf_setlen(&ldir, ldir_len);
helper_argv[1] = ldir.buf;
strbuf_setlen(&rdir, rdir_len);
helper_argv[2] = rdir.buf;
if (extcmd) {
helper_argv[0] = extcmd;
flags = 0;
} else
setenv("GIT_DIFFTOOL_DIRDIFF", "true", 1);
rc = run_command_v_opt(helper_argv, flags);
/*
* If the diff includes working copy files and those
* files were modified during the diff, then the changes
* should be copied back to the working tree.
* Do not copy back files when symlinks are used and the
* external tool did not replace the original link with a file.
*
* These hashes are loaded lazily since they aren't needed
* in the common case of --symlinks and the difftool updating
* files through the symlink.
*/
hashmap_init(&wt_modified, (hashmap_cmp_fn)path_entry_cmp,
NULL, wtindex.cache_nr);
hashmap_init(&tmp_modified, (hashmap_cmp_fn)path_entry_cmp,
NULL, wtindex.cache_nr);
for (i = 0; i < wtindex.cache_nr; i++) {
struct hashmap_entry dummy;
const char *name = wtindex.cache[i]->name;
struct stat st;
add_path(&rdir, rdir_len, name);
if (lstat(rdir.buf, &st))
continue;
if ((symlinks && S_ISLNK(st.st_mode)) || !S_ISREG(st.st_mode))
continue;
if (!indices_loaded) {
static struct lock_file lock;
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/wtindex", tmpdir);
if (hold_lock_file_for_update(&lock, buf.buf, 0) < 0 ||
write_locked_index(&wtindex, &lock, COMMIT_LOCK)) {
ret = error("could not write %s", buf.buf);
rollback_lock_file(&lock);
goto finish;
}
changed_files(&wt_modified, buf.buf, workdir);
strbuf_setlen(&rdir, rdir_len);
changed_files(&tmp_modified, buf.buf, rdir.buf);
add_path(&rdir, rdir_len, name);
indices_loaded = 1;
}
hashmap_entry_init(&dummy, strhash(name));
if (hashmap_get(&tmp_modified, &dummy, name)) {
add_path(&wtdir, wtdir_len, name);
if (hashmap_get(&wt_modified, &dummy, name)) {
warning(_("both files modified: '%s' and '%s'."),
wtdir.buf, rdir.buf);
warning(_("working tree file has been left."));
warning("%s", "");
err = 1;
} else if (unlink(wtdir.buf) ||
copy_file(wtdir.buf, rdir.buf, st.st_mode))
warning_errno(_("could not copy '%s' to '%s'"),
rdir.buf, wtdir.buf);
}
}
if (err) {
warning(_("temporary files exist in '%s'."), tmpdir);
warning(_("you may want to cleanup or recover these."));
exit(1);
} else
exit_cleanup(tmpdir, rc);
finish:
if (fp)
fclose(fp);
free(lbase_dir);
free(rbase_dir);
strbuf_release(&ldir);
strbuf_release(&rdir);
strbuf_release(&wtdir);
strbuf_release(&buf);
return ret;
}
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;
struct string_list files_staged = STRING_LIST_INIT_NODUP;
struct string_list files_cached = STRING_LIST_INIT_NODUP;
struct string_list files_submodule = STRING_LIST_INIT_NODUP;
struct string_list files_local = STRING_LIST_INIT_NODUP;
no_head = is_null_sha1(head);
for (i = 0; i < list.nr; i++) {
struct stat st;
int pos;
const struct cache_entry *ce;
const char *name = list.entry[i].name;
unsigned char sha1[20];
unsigned mode;
int local_changes = 0;
int staged_changes = 0;
pos = cache_name_pos(name, strlen(name));
if (pos < 0) {
/*
* Skip unmerged entries except for populated submodules
* that could lose history when removed.
*/
pos = get_ours_cache_pos(name, pos);
if (pos < 0)
continue;
if (!S_ISGITLINK(active_cache[pos]->ce_mode) ||
is_empty_dir(name))
continue;
}
ce = active_cache[pos];
if (lstat(ce->name, &st) < 0) {
if (errno != ENOENT && errno != ENOTDIR)
warning_errno(_("failed to stat '%s'"), ce->name);
/* 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 unless they are submodules.
*/
if (!S_ISGITLINK(ce->ce_mode))
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 it's a submodule, is its work tree modified?
*/
if (ce_match_stat(ce, &st, 0) ||
(S_ISGITLINK(ce->ce_mode) &&
!ok_to_remove_submodule(ce->name)))
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_intent_to_add(ce))
string_list_append(&files_staged, name);
}
else if (!index_only) {
if (staged_changes)
string_list_append(&files_cached, name);
if (local_changes) {
if (S_ISGITLINK(ce->ce_mode) &&
!submodule_uses_gitfile(name))
string_list_append(&files_submodule, name);
else
string_list_append(&files_local, name);
}
}
}
print_error_files(&files_staged,
Q_("the following file has staged content different "
"from both the\nfile and the HEAD:",
"the following files have staged content different"
" from both the\nfile and the HEAD:",
files_staged.nr),
_("\n(use -f to force removal)"),
&errs);
string_list_clear(&files_staged, 0);
print_error_files(&files_cached,
Q_("the following file has changes "
"staged in the index:",
"the following files have changes "
"staged in the index:", files_cached.nr),
_("\n(use --cached to keep the file,"
" or -f to force removal)"),
&errs);
string_list_clear(&files_cached, 0);
error_removing_concrete_submodules(&files_submodule, &errs);
print_error_files(&files_local,
Q_("the following file has local modifications:",
"the following files have local modifications:",
files_local.nr),
_("\n(use --cached to keep the file,"
" or -f to force removal)"),
&errs);
string_list_clear(&files_local, 0);
return errs;
}
