int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result)
{
int len = strlen(path), retval;
char *gitdir;
const char *tmp;
while (len && path[len-1] == '/')
len--;
if (!len)
return -1;
gitdir = xmalloc(len + MAXREFLEN + 8);
memcpy(gitdir, path, len);
memcpy(gitdir + len, "/.git", 6);
len += 5;
tmp = read_gitfile_gently(gitdir);
if (tmp) {
free(gitdir);
len = strlen(tmp);
gitdir = xmalloc(len + MAXREFLEN + 3);
memcpy(gitdir, tmp, len);
}
gitdir[len] = '/';
gitdir[++len] = '\0';
retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0);
free(gitdir);
return retval;
}
static void setup_git_env(void)
{
git_dir = getenv(GIT_DIR_ENVIRONMENT);
git_dir = git_dir ? xstrdup(git_dir) : NULL;
if (!git_dir) {
git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
git_dir = git_dir ? xstrdup(git_dir) : NULL;
}
if (!git_dir)
git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
git_object_dir = getenv(DB_ENVIRONMENT);
if (!git_object_dir) {
git_object_dir = xmalloc(strlen(git_dir) + 9);
sprintf(git_object_dir, "%s/objects", git_dir);
}
git_index_file = getenv(INDEX_ENVIRONMENT);
if (!git_index_file) {
git_index_file = xmalloc(strlen(git_dir) + 7);
sprintf(git_index_file, "%s/index", git_dir);
}
git_graft_file = getenv(GRAFT_ENVIRONMENT);
if (!git_graft_file)
git_graft_file = git_pathdup("info/grafts");
if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
read_replace_refs = 0;
}
int is_nonbare_repository_dir(struct strbuf *path)
{
int ret = 0;
int gitfile_error;
size_t orig_path_len = path->len;
assert(orig_path_len != 0);
strbuf_complete(path, '/');
strbuf_addstr(path, ".git");
if (read_gitfile_gently(path->buf, &gitfile_error) || is_git_directory(path->buf))
ret = 1;
if (gitfile_error == READ_GITFILE_ERR_OPEN_FAILED ||
gitfile_error == READ_GITFILE_ERR_READ_FAILED)
ret = 1;
strbuf_setlen(path, orig_path_len);
return ret;
}
static int add_submodule_odb(const char *path)
{
struct strbuf objects_directory = STRBUF_INIT;
struct alternate_object_database *alt_odb;
int ret = 0;
const char *git_dir;
strbuf_addf(&objects_directory, "%s/.git", path);
git_dir = read_gitfile_gently(objects_directory.buf);
if (git_dir) {
strbuf_reset(&objects_directory);
strbuf_addstr(&objects_directory, git_dir);
}
strbuf_addstr(&objects_directory, "/objects/");
if (!is_directory(objects_directory.buf)) {
ret = -1;
goto done;
}
/* avoid adding it twice */
for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
if (alt_odb->name - alt_odb->base == objects_directory.len &&
!strncmp(alt_odb->base, objects_directory.buf,
objects_directory.len))
goto done;
alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
alt_odb->next = alt_odb_list;
strcpy(alt_odb->base, objects_directory.buf);
alt_odb->name = alt_odb->base + objects_directory.len;
alt_odb->name[2] = '/';
alt_odb->name[40] = '\0';
alt_odb->name[41] = '\0';
alt_odb_list = alt_odb;
prepare_alt_odb();
done:
strbuf_release(&objects_directory);
return ret;
}
static void setup_git_env(void)
{
git_dir = getenv(GIT_DIR_ENVIRONMENT);
if (!git_dir)
git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
if (!git_dir)
git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
git_object_dir = getenv(DB_ENVIRONMENT);
if (!git_object_dir) {
git_object_dir = xmalloc(strlen(git_dir) + 9);
sprintf(git_object_dir, "%s/objects", git_dir);
}
git_refs_dir = xmalloc(strlen(git_dir) + 6);
sprintf(git_refs_dir, "%s/refs", git_dir);
git_index_file = getenv(INDEX_ENVIRONMENT);
if (!git_index_file) {
git_index_file = xmalloc(strlen(git_dir) + 7);
sprintf(git_index_file, "%s/index", git_dir);
}
git_graft_file = getenv(GRAFT_ENVIRONMENT);
if (!git_graft_file)
git_graft_file = git_pathdup("info/grafts");
}
/*
* We cannot decide in this function whether we are in the work tree or
* not, since the config can only be read _after_ this function was called.
*/
const char *setup_git_directory_gently(int *nongit_ok)
{
const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
static char cwd[PATH_MAX+1];
const char *gitdirenv;
const char *gitfile_dir;
int len, offset, ceil_offset;
/*
* Let's assume that we are in a git repository.
* If it turns out later that we are somewhere else, the value will be
* updated accordingly.
*/
if (nongit_ok)
*nongit_ok = 0;
/*
* If GIT_DIR is set explicitly, we're not going
* to do any discovery, but we still do repository
* validation.
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv) {
if (PATH_MAX - 40 < strlen(gitdirenv))
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
if (is_git_directory(gitdirenv)) {
static char buffer[1024 + 1];
const char *retval;
if (!work_tree_env) {
retval = set_work_tree(gitdirenv);
/* config may override worktree */
if (check_repository_format_gently(nongit_ok))
return NULL;
return retval;
}
if (check_repository_format_gently(nongit_ok))
return NULL;
retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
get_git_work_tree());
if (!retval || !*retval)
return NULL;
set_git_dir(make_absolute_path(gitdirenv));
if (chdir(work_tree_env) < 0)
die_errno ("Could not chdir to '%s'", work_tree_env);
strcat(buffer, "/");
return retval;
}
if (nongit_ok) {
*nongit_ok = 1;
return NULL;
}
die("Not a git repository: '%s'", gitdirenv);
}
if (!getcwd(cwd, sizeof(cwd)-1))
die_errno("Unable to read current working directory");
ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
ceil_offset = 1;
/*
* Test in the following order (relative to the cwd):
* - .git (file containing "gitdir: <path>")
* - .git/
* - ./ (bare)
* - ../.git
* - ../.git/
* - ../ (bare)
* - ../../.git/
* etc.
*/
offset = len = strlen(cwd);
for (;;) {
gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
if (gitfile_dir) {
if (set_git_dir(gitfile_dir))
die("Repository setup failed");
break;
}
if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
break;
if (is_git_directory(".")) {
inside_git_dir = 1;
if (!work_tree_env)
inside_work_tree = 0;
if (offset != len) {
cwd[offset] = '\0';
setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
} else
setenv(GIT_DIR_ENVIRONMENT, ".", 1);
check_repository_format_gently(nongit_ok);
return NULL;
}
while (--offset > ceil_offset && cwd[offset] != '/');
if (offset <= ceil_offset) {
if (nongit_ok) {
if (chdir(cwd))
die_errno("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
}
if (chdir(".."))
die_errno("Cannot change to '%s/..'", cwd);
}
inside_git_dir = 0;
if (!work_tree_env)
inside_work_tree = 1;
git_work_tree_cfg = xstrndup(cwd, offset);
if (check_repository_format_gently(nongit_ok))
return NULL;
if (offset == len)
return NULL;
/* Make "offset" point to past the '/', and add a '/' at the end */
offset++;
cwd[len++] = '/';
cwd[len] = 0;
return cwd + offset;
}
/*
* We cannot decide in this function whether we are in the work tree or
* not, since the config can only be read _after_ this function was called.
*/
static const char *setup_git_directory_gently_1(int *nongit_ok)
{
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
static char cwd[PATH_MAX+1];
const char *gitdirenv, *ret;
char *gitfile;
int len, offset, ceil_offset;
dev_t current_device = 0;
int one_filesystem = 1;
/*
* Let's assume that we are in a git repository.
* If it turns out later that we are somewhere else, the value will be
* updated accordingly.
*/
if (nongit_ok)
*nongit_ok = 0;
if (!getcwd(cwd, sizeof(cwd)-1))
die_errno("Unable to read current working directory");
offset = len = strlen(cwd);
/*
* If GIT_DIR is set explicitly, we're not going
* to do any discovery, but we still do repository
* validation.
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv)
return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
ceil_offset = 1;
/*
* Test in the following order (relative to the cwd):
* - .git (file containing "gitdir: <path>")
* - .git/
* - ./ (bare)
* - ../.git
* - ../.git/
* - ../ (bare)
* - ../../.git/
* etc.
*/
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
if (one_filesystem)
current_device = get_device_or_die(".", NULL);
for (;;) {
gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
if (gitfile)
gitdirenv = gitfile = xstrdup(gitfile);
else {
if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
}
if (gitdirenv) {
ret = setup_discovered_git_dir(gitdirenv,
cwd, offset, len,
nongit_ok);
free(gitfile);
return ret;
}
free(gitfile);
if (is_git_directory("."))
return setup_bare_git_dir(cwd, offset, len, nongit_ok);
while (--offset > ceil_offset && cwd[offset] != '/');
if (offset <= ceil_offset)
return setup_nongit(cwd, nongit_ok);
if (one_filesystem) {
dev_t parent_device = get_device_or_die("..", cwd);
if (parent_device != current_device) {
if (nongit_ok) {
if (chdir(cwd))
die_errno("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
cwd[offset] = '\0';
die("Not a git repository (or any parent up to mount parent %s)\n"
"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
}
}
if (chdir("..")) {
cwd[offset] = '\0';
die_errno("Cannot change to '%s/..'", cwd);
}
}
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
char *cwd, int len,
int *nongit_ok)
{
const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
const char *worktree;
char *gitfile;
if (PATH_MAX - 40 < strlen(gitdirenv))
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
gitfile = (char*)read_gitfile_gently(gitdirenv);
if (gitfile) {
gitfile = xstrdup(gitfile);
gitdirenv = gitfile;
}
if (!is_git_directory(gitdirenv)) {
if (nongit_ok) {
*nongit_ok = 1;
free(gitfile);
return NULL;
}
die("Not a git repository: '%s'", gitdirenv);
}
if (check_repository_format_gently(gitdirenv, nongit_ok)) {
free(gitfile);
return NULL;
}
/* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
if (work_tree_env)
set_git_work_tree(work_tree_env);
else if (is_bare_repository_cfg > 0) {
if (git_work_tree_cfg) /* #22.2, #30 */
die("core.bare and core.worktree do not make sense");
/* #18, #26 */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
else if (git_work_tree_cfg) { /* #6, #14 */
if (is_absolute_path(git_work_tree_cfg))
set_git_work_tree(git_work_tree_cfg);
else {
char core_worktree[PATH_MAX];
if (chdir(gitdirenv))
die_errno("Could not chdir to '%s'", gitdirenv);
if (chdir(git_work_tree_cfg))
die_errno("Could not chdir to '%s'", git_work_tree_cfg);
if (!getcwd(core_worktree, PATH_MAX))
die_errno("Could not get directory '%s'", git_work_tree_cfg);
if (chdir(cwd))
die_errno("Could not come back to cwd");
set_git_work_tree(core_worktree);
}
}
else /* #2, #10 */
set_git_work_tree(".");
/* set_git_work_tree() must have been called by now */
worktree = get_git_work_tree();
/* both get_git_work_tree() and cwd are already normalized */
if (!strcmp(cwd, worktree)) { /* cwd == worktree */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
if (!prefixcmp(cwd, worktree) &&
cwd[strlen(worktree)] == '/') { /* cwd inside worktree */
set_git_dir(real_path(gitdirenv));
if (chdir(worktree))
die_errno("Could not chdir to '%s'", worktree);
cwd[len++] = '/';
cwd[len] = '\0';
free(gitfile);
return cwd + strlen(worktree) + 1;
}
/* cwd outside worktree */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
unsigned flags)
{
struct strbuf wt_path = STRBUF_INIT;
char *path = NULL;
int err, ret = -1;
strbuf_addf(&wt_path, "%s/.git", wt->path);
if (is_main_worktree(wt)) {
if (is_directory(wt_path.buf)) {
ret = 0;
goto done;
}
/*
* Main worktree using .git file to point to the
* repository would make it impossible to know where
* the actual worktree is if this function is executed
* from another worktree. No .git file support for now.
*/
strbuf_addf_gently(errmsg,
_("'%s' at main working tree is not the repository directory"),
wt_path.buf);
goto done;
}
/*
* Make sure "gitdir" file points to a real .git file and that
* file points back here.
*/
if (!is_absolute_path(wt->path)) {
strbuf_addf_gently(errmsg,
_("'%s' file does not contain absolute path to the working tree location"),
git_common_path("worktrees/%s/gitdir", wt->id));
goto done;
}
if (flags & WT_VALIDATE_WORKTREE_MISSING_OK &&
!file_exists(wt->path)) {
ret = 0;
goto done;
}
if (!file_exists(wt_path.buf)) {
strbuf_addf_gently(errmsg, _("'%s' does not exist"), wt_path.buf);
goto done;
}
path = xstrdup_or_null(read_gitfile_gently(wt_path.buf, &err));
if (!path) {
strbuf_addf_gently(errmsg, _("'%s' is not a .git file, error code %d"),
wt_path.buf, err);
goto done;
}
ret = fspathcmp(path, real_path(git_common_path("worktrees/%s", wt->id)));
if (ret)
strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"),
wt->path, git_common_path("worktrees/%s", wt->id));
done:
free(path);
strbuf_release(&wt_path);
return ret;
}
unsigned is_submodule_modified(const char *path, int ignore_untracked)
{
ssize_t len;
struct child_process cp;
const char *argv[] = {
"status",
"--porcelain",
NULL,
NULL,
};
struct strbuf buf = STRBUF_INIT;
unsigned dirty_submodule = 0;
const char *line, *next_line;
const char *git_dir;
strbuf_addf(&buf, "%s/.git", path);
git_dir = read_gitfile_gently(buf.buf);
if (!git_dir)
git_dir = buf.buf;
if (!is_directory(git_dir)) {
strbuf_release(&buf);
/* The submodule is not checked out, so it is not modified */
return 0;
}
strbuf_reset(&buf);
if (ignore_untracked)
argv[2] = "-uno";
memset(&cp, 0, sizeof(cp));
cp.argv = argv;
cp.env = local_repo_env;
cp.git_cmd = 1;
cp.no_stdin = 1;
cp.out = -1;
cp.dir = path;
if (start_command(&cp))
die("Could not run git status --porcelain");
len = strbuf_read(&buf, cp.out, 1024);
line = buf.buf;
while (len > 2) {
if ((line[0] == '?') && (line[1] == '?')) {
dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
break;
} else {
dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
if (ignore_untracked ||
(dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
break;
}
next_line = strchr(line, '\n');
if (!next_line)
break;
next_line++;
len -= (next_line - line);
line = next_line;
}
close(cp.out);
if (finish_command(&cp))
die("git status --porcelain failed");
strbuf_release(&buf);
return dirty_submodule;
}
int fetch_populated_submodules(int num_options, const char **options,
const char *prefix, int command_line_option,
int quiet)
{
int i, result = 0, argc = 0, default_argc;
struct child_process cp;
const char **argv;
struct string_list_item *name_for_path;
const char *work_tree = get_git_work_tree();
if (!work_tree)
goto out;
if (!the_index.initialized)
if (read_cache() < 0)
die("index file corrupt");
/* 6: "fetch" (options) --recurse-submodules-default default "--submodule-prefix" prefix NULL */
argv = xcalloc(num_options + 6, sizeof(const char *));
argv[argc++] = "fetch";
for (i = 0; i < num_options; i++)
argv[argc++] = options[i];
argv[argc++] = "--recurse-submodules-default";
default_argc = argc++;
argv[argc++] = "--submodule-prefix";
memset(&cp, 0, sizeof(cp));
cp.argv = argv;
cp.env = local_repo_env;
cp.git_cmd = 1;
cp.no_stdin = 1;
for (i = 0; i < active_nr; i++) {
struct strbuf submodule_path = STRBUF_INIT;
struct strbuf submodule_git_dir = STRBUF_INIT;
struct strbuf submodule_prefix = STRBUF_INIT;
struct cache_entry *ce = active_cache[i];
const char *git_dir, *name, *default_argv;
if (!S_ISGITLINK(ce->ce_mode))
continue;
name = ce->name;
name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
if (name_for_path)
name = name_for_path->util;
default_argv = "yes";
if (command_line_option == RECURSE_SUBMODULES_DEFAULT) {
struct string_list_item *fetch_recurse_submodules_option;
fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
if (fetch_recurse_submodules_option) {
if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_OFF)
continue;
if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_ON_DEMAND) {
if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
continue;
default_argv = "on-demand";
}
} else {
if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF)
continue;
if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) {
if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
continue;
default_argv = "on-demand";
}
}
} else if (command_line_option == RECURSE_SUBMODULES_ON_DEMAND) {
if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
continue;
default_argv = "on-demand";
}
strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name);
git_dir = read_gitfile_gently(submodule_git_dir.buf);
if (!git_dir)
git_dir = submodule_git_dir.buf;
if (is_directory(git_dir)) {
if (!quiet)
printf("Fetching submodule %s%s\n", prefix, ce->name);
cp.dir = submodule_path.buf;
argv[default_argc] = default_argv;
argv[argc] = submodule_prefix.buf;
if (run_command(&cp))
result = 1;
}
strbuf_release(&submodule_path);
strbuf_release(&submodule_git_dir);
strbuf_release(&submodule_prefix);
}
free(argv);
out:
string_list_clear(&changed_submodule_paths, 1);
return result;
}
int fetch_populated_submodules(int num_options, const char **options,
const char *prefix, int ignore_config,
int quiet)
{
int i, result = 0, argc = 0;
struct child_process cp;
const char **argv;
struct string_list_item *name_for_path;
const char *work_tree = get_git_work_tree();
if (!work_tree)
return 0;
if (!the_index.initialized)
if (read_cache() < 0)
die("index file corrupt");
/* 4: "fetch" (options) "--submodule-prefix" prefix NULL */
argv = xcalloc(num_options + 4, sizeof(const char *));
argv[argc++] = "fetch";
for (i = 0; i < num_options; i++)
argv[argc++] = options[i];
argv[argc++] = "--submodule-prefix";
memset(&cp, 0, sizeof(cp));
cp.argv = argv;
cp.env = local_repo_env;
cp.git_cmd = 1;
cp.no_stdin = 1;
for (i = 0; i < active_nr; i++) {
struct strbuf submodule_path = STRBUF_INIT;
struct strbuf submodule_git_dir = STRBUF_INIT;
struct strbuf submodule_prefix = STRBUF_INIT;
struct cache_entry *ce = active_cache[i];
const char *git_dir, *name;
if (!S_ISGITLINK(ce->ce_mode))
continue;
name = ce->name;
name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
if (name_for_path)
name = name_for_path->util;
if (!ignore_config) {
struct string_list_item *fetch_recurse_submodules_option;
fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
if (fetch_recurse_submodules_option) {
if (!fetch_recurse_submodules_option->util)
continue;
} else {
if (!config_fetch_recurse_submodules)
continue;
}
}
strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name);
git_dir = read_gitfile_gently(submodule_git_dir.buf);
if (!git_dir)
git_dir = submodule_git_dir.buf;
if (is_directory(git_dir)) {
if (!quiet)
printf("Fetching submodule %s%s\n", prefix, ce->name);
cp.dir = submodule_path.buf;
argv[argc] = submodule_prefix.buf;
if (run_command(&cp))
result = 1;
}
strbuf_release(&submodule_path);
strbuf_release(&submodule_git_dir);
strbuf_release(&submodule_prefix);
}
free(argv);
return result;
}
