"'git <command> [<revision>...] -- [<file>...]'", arg);
}
+int get_common_dir(struct strbuf *sb, const char *gitdir)
+{
+ struct strbuf data = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ const char *git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
+ int ret = 0;
+ if (git_common_dir) {
+ strbuf_addstr(sb, git_common_dir);
+ return 1;
+ }
+ strbuf_addf(&path, "%s/commondir", gitdir);
+ if (file_exists(path.buf)) {
+ if (strbuf_read_file(&data, path.buf, 0) <= 0)
+ die_errno(_("failed to read %s"), path.buf);
+ while (data.len && (data.buf[data.len - 1] == '\n' ||
+ data.buf[data.len - 1] == '\r'))
+ data.len--;
+ data.buf[data.len] = '\0';
+ strbuf_reset(&path);
+ if (!is_absolute_path(data.buf))
+ strbuf_addf(&path, "%s/", gitdir);
+ strbuf_addbuf(&path, &data);
+ strbuf_addstr(sb, real_path(path.buf));
+ ret = 1;
+ } else
+ strbuf_addstr(sb, gitdir);
+ strbuf_release(&data);
+ strbuf_release(&path);
+ return ret;
+}
/*
* Test if it looks like we're at a git directory.
*/
int is_git_directory(const char *suspect)
{
- char path[PATH_MAX];
- size_t len = strlen(suspect);
+ struct strbuf path = STRBUF_INIT;
+ int ret = 0;
+ size_t len;
- if (PATH_MAX <= len + strlen("/objects"))
- die("Too long path: %.*s", 60, suspect);
- strcpy(path, suspect);
+ /* Check worktree-related signatures */
+ strbuf_addf(&path, "%s/HEAD", suspect);
+ if (validate_headref(path.buf))
+ goto done;
+
+ strbuf_reset(&path);
+ get_common_dir(&path, suspect);
+ len = path.len;
+
+ /* Check non-worktree-related signatures */
if (getenv(DB_ENVIRONMENT)) {
if (access(getenv(DB_ENVIRONMENT), X_OK))
- return 0;
+ goto done;
}
else {
- strcpy(path + len, "/objects");
- if (access(path, X_OK))
- return 0;
+ strbuf_setlen(&path, len);
+ strbuf_addstr(&path, "/objects");
+ if (access(path.buf, X_OK))
+ goto done;
}
- strcpy(path + len, "/refs");
- if (access(path, X_OK))
- return 0;
+ strbuf_setlen(&path, len);
+ strbuf_addstr(&path, "/refs");
+ if (access(path.buf, X_OK))
+ goto done;
- strcpy(path + len, "/HEAD");
- if (validate_headref(path))
- return 0;
-
- return 1;
+ ret = 1;
+done:
+ strbuf_release(&path);
+ return ret;
}
int is_inside_git_dir(void)
initialized = 1;
}
+static int check_repo_format(const char *var, const char *value, void *cb)
+{
+ if (strcmp(var, "core.repositoryformatversion") == 0)
+ repository_format_version = git_config_int(var, value);
+ else if (strcmp(var, "core.sharedrepository") == 0)
+ shared_repository = git_config_perm(var, value);
+ return 0;
+}
+
static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
{
- char repo_config[PATH_MAX+1];
+ struct strbuf sb = STRBUF_INIT;
+ const char *repo_config;
+ config_fn_t fn;
+ int ret = 0;
+
+ if (get_common_dir(&sb, gitdir))
+ fn = check_repo_format;
+ else
+ fn = check_repository_format_version;
+ strbuf_addstr(&sb, "/config");
+ repo_config = sb.buf;
/*
* git_config() can't be used here because it calls git_pathdup()
* Use a gentler version of git_config() to check if this repo
* is a good one.
*/
- snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
- git_config_early(check_repository_format_version, NULL, repo_config);
+ git_config_early(fn, NULL, repo_config);
if (GIT_REPO_VERSION < repository_format_version) {
if (!nongit_ok)
die ("Expected git repo version <= %d, found %d",
GIT_REPO_VERSION, repository_format_version);
warning("Please upgrade Git");
*nongit_ok = -1;
- return -1;
+ ret = -1;
}
- return 0;
+ strbuf_release(&sb);
+ return ret;
+}
+
+static void update_linked_gitdir(const char *gitfile, const char *gitdir)
+{
+ struct strbuf path = STRBUF_INIT;
+ struct stat st;
+
+ strbuf_addf(&path, "%s/gitfile", gitdir);
+ if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL))
+ write_file(path.buf, 0, "%s\n", gitfile);
+ strbuf_release(&path);
}
/*
if (!is_git_directory(dir))
die("Not a git repository: %s", dir);
+
+ update_linked_gitdir(path, dir);
path = real_path(dir);
free(buf);
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
- char *cwd, int len,
+ struct strbuf *cwd,
int *nongit_ok)
{
const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
if (is_absolute_path(git_work_tree_cfg))
set_git_work_tree(git_work_tree_cfg);
else {
- char core_worktree[PATH_MAX];
+ char *core_worktree;
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))
+ core_worktree = xgetcwd();
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
set_git_work_tree(core_worktree);
+ free(core_worktree);
}
}
else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) {
worktree = get_git_work_tree();
/* both get_git_work_tree() and cwd are already normalized */
- if (!strcmp(cwd, worktree)) { /* cwd == worktree */
+ if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
- offset = dir_inside_of(cwd, worktree);
+ offset = dir_inside_of(cwd->buf, worktree);
if (offset >= 0) { /* 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';
+ strbuf_addch(cwd, '/');
free(gitfile);
- return cwd + offset;
+ return cwd->buf + offset;
}
/* cwd outside worktree */
}
static const char *setup_discovered_git_dir(const char *gitdir,
- char *cwd, int offset, int len,
+ struct strbuf *cwd, int offset,
int *nongit_ok)
{
if (check_repository_format_gently(gitdir, nongit_ok))
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
- if (offset != len && !is_absolute_path(gitdir))
+ if (offset != cwd->len && !is_absolute_path(gitdir))
gitdir = xstrdup(real_path(gitdir));
- if (chdir(cwd))
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
- return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+ return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
}
/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
if (is_bare_repository_cfg > 0) {
- set_git_dir(offset == len ? gitdir : real_path(gitdir));
- if (chdir(cwd))
+ set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
return NULL;
}
set_git_dir(gitdir);
inside_git_dir = 0;
inside_work_tree = 1;
- if (offset == len)
+ if (offset == cwd->len)
return NULL;
/* Make "offset" point to past the '/', and add a '/' at the end */
offset++;
- cwd[len++] = '/';
- cwd[len] = 0;
- return cwd + offset;
+ strbuf_addch(cwd, '/');
+ return cwd->buf + offset;
}
/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
-static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
+static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
+ int *nongit_ok)
{
int root_len;
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
const char *gitdir;
- gitdir = offset == len ? "." : xmemdupz(cwd, offset);
- if (chdir(cwd))
+ gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
- return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+ return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
}
inside_git_dir = 1;
inside_work_tree = 0;
- if (offset != len) {
- if (chdir(cwd))
+ if (offset != cwd->len) {
+ if (chdir(cwd->buf))
die_errno("Cannot come back to cwd");
- root_len = offset_1st_component(cwd);
- cwd[offset > root_len ? offset : root_len] = '\0';
- set_git_dir(cwd);
+ root_len = offset_1st_component(cwd->buf);
+ strbuf_setlen(cwd, offset > root_len ? offset : root_len);
+ set_git_dir(cwd->buf);
}
else
set_git_dir(".");
{
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
- static char cwd[PATH_MAX + 1];
+ static struct strbuf cwd = STRBUF_INIT;
const char *gitdirenv, *ret;
char *gitfile;
- int len, offset, offset_parent, ceil_offset = -1;
+ int offset, offset_parent, ceil_offset = -1;
dev_t current_device = 0;
int one_filesystem = 1;
+ /*
+ * We may have read an incomplete configuration before
+ * setting-up the git directory. If so, clear the cache so
+ * that the next queries to the configuration reload complete
+ * configuration (including the per-repo config file that we
+ * ignored previously).
+ */
+ git_config_clear();
+
/*
* Let's assume that we are in a git repository.
* If it turns out later that we are somewhere else, the value will be
if (nongit_ok)
*nongit_ok = 0;
- if (!getcwd(cwd, sizeof(cwd) - 1))
+ if (strbuf_getcwd(&cwd))
die_errno("Unable to read current working directory");
- offset = len = strlen(cwd);
+ offset = cwd.len;
/*
* If GIT_DIR is set explicitly, we're not going
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv)
- return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
+ return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok);
if (env_ceiling_dirs) {
int empty_entry_found = 0;
string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
filter_string_list(&ceiling_dirs, 0,
canonicalize_ceiling_entry, &empty_entry_found);
- ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
+ ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs);
string_list_clear(&ceiling_dirs, 0);
}
- if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
+ if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
ceil_offset = 1;
/*
if (gitdirenv) {
ret = setup_discovered_git_dir(gitdirenv,
- cwd, offset, len,
+ &cwd, offset,
nongit_ok);
free(gitfile);
return ret;
free(gitfile);
if (is_git_directory("."))
- return setup_bare_git_dir(cwd, offset, len, nongit_ok);
+ return setup_bare_git_dir(&cwd, offset, nongit_ok);
offset_parent = offset;
- while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
+ while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
if (offset_parent <= ceil_offset)
- return setup_nongit(cwd, nongit_ok);
+ return setup_nongit(cwd.buf, nongit_ok);
if (one_filesystem) {
- dev_t parent_device = get_device_or_die("..", cwd, offset);
+ dev_t parent_device = get_device_or_die("..", cwd.buf,
+ offset);
if (parent_device != current_device) {
if (nongit_ok) {
- if (chdir(cwd))
+ if (chdir(cwd.buf))
die_errno("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
- cwd[offset] = '\0';
+ strbuf_setlen(&cwd, offset);
die("Not a git repository (or any parent up to mount point %s)\n"
- "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
+ "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).",
+ cwd.buf);
}
}
if (chdir("..")) {
- cwd[offset] = '\0';
- die_errno("Cannot change to '%s/..'", cwd);
+ strbuf_setlen(&cwd, offset);
+ die_errno("Cannot change to '%s/..'", cwd.buf);
}
offset = offset_parent;
}
int check_repository_format_version(const char *var, const char *value, void *cb)
{
- if (strcmp(var, "core.repositoryformatversion") == 0)
- repository_format_version = git_config_int(var, value);
- else if (strcmp(var, "core.sharedrepository") == 0)
- shared_repository = git_config_perm(var, value);
- else if (strcmp(var, "core.bare") == 0) {
+ int ret = check_repo_format(var, value, cb);
+ if (ret)
+ return ret;
+ if (strcmp(var, "core.bare") == 0) {
is_bare_repository_cfg = git_config_bool(var, value);
if (is_bare_repository_cfg == 1)
inside_work_tree = -1;