static int inside_git_dir = -1;
static int inside_work_tree = -1;
-const char *prefix_path(const char *prefix, int len, const char *path)
+char *prefix_path(const char *prefix, int len, const char *path)
{
const char *orig = path;
- char *sanitized = xmalloc(len + strlen(path) + 1);
- if (is_absolute_path(orig))
- strcpy(sanitized, path);
- else {
+ char *sanitized;
+ if (is_absolute_path(orig)) {
+ const char *temp = real_path(path);
+ sanitized = xmalloc(len + strlen(temp) + 1);
+ strcpy(sanitized, temp);
+ } else {
+ sanitized = xmalloc(len + strlen(path) + 1);
if (len)
memcpy(sanitized, prefix, len);
strcpy(sanitized + len, path);
if (normalize_path_copy(sanitized, sanitized))
goto error_out;
if (is_absolute_path(orig)) {
- size_t len, total;
+ size_t root_len, len, total;
const char *work_tree = get_git_work_tree();
if (!work_tree)
goto error_out;
len = strlen(work_tree);
+ root_len = offset_1st_component(work_tree);
total = strlen(sanitized) + 1;
if (strncmp(sanitized, work_tree, len) ||
- (sanitized[len] != '\0' && sanitized[len] != '/')) {
+ (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
error_out:
die("'%s' is outside repository", orig);
}
{
static char path[PATH_MAX];
#ifndef WIN32
- if (!pfx || !*pfx || is_absolute_path(arg))
+ if (!pfx_len || is_absolute_path(arg))
return arg;
memcpy(path, pfx, pfx_len);
strcpy(path + pfx_len, arg);
/* don't add prefix to absolute paths, but still replace '\' by '/' */
if (is_absolute_path(arg))
pfx_len = 0;
- else
+ else if (pfx_len)
memcpy(path, pfx, pfx_len);
strcpy(path + pfx_len, arg);
for (p = path + pfx_len; *p; p++)
char path[PATH_MAX];
size_t len = strlen(suspect);
+ if (PATH_MAX <= len + strlen("/objects"))
+ die("Too long path: %.*s", 60, suspect);
strcpy(path, suspect);
if (getenv(DB_ENVIRONMENT)) {
if (access(getenv(DB_ENVIRONMENT), X_OK))
return inside_work_tree;
}
-/*
- * set_work_tree() is only ever called if you set GIT_DIR explicitly.
- * The old behaviour (which we retain here) is to set the work tree root
- * to the cwd, unless overridden by the config, the command line, or
- * GIT_WORK_TREE.
- */
-static const char *set_work_tree(const char *dir)
-{
- char buffer[PATH_MAX + 1];
-
- if (!getcwd(buffer, sizeof(buffer)))
- die ("Could not get the current working directory");
- git_work_tree_cfg = xstrdup(buffer);
- inside_work_tree = 1;
-
- return NULL;
-}
-
void setup_work_tree(void)
{
const char *work_tree, *git_dir;
work_tree = get_git_work_tree();
git_dir = get_git_dir();
if (!is_absolute_path(git_dir))
- git_dir = make_absolute_path(git_dir);
+ git_dir = real_path(get_git_dir());
if (!work_tree || chdir(work_tree))
die("This operation must be run in a work tree");
- set_git_dir(make_relative_path(git_dir, work_tree));
+
+ /*
+ * Make sure subsequent git processes find correct worktree
+ * if $GIT_WORK_TREE is set relative
+ */
+ if (getenv(GIT_WORK_TREE_ENVIRONMENT))
+ setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
+
+ set_git_dir(relative_path(git_dir, work_tree));
initialized = 1;
}
-static int check_repository_format_gently(int *nongit_ok)
+static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
{
- git_config(check_repository_format_version, NULL);
+ char repo_config[PATH_MAX+1];
+
+ /*
+ * git_config() can't be used here because it calls git_pathdup()
+ * to get $GIT_CONFIG/config. That call will make setup_git_env()
+ * set git_dir to ".git".
+ *
+ * We are in gitdir setup, no git dir has been found useable yet.
+ * Use a gentler version of git_config() to check if this repo
+ * is a good one.
+ */
+ snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
+ git_config_early(check_repository_format_version, NULL, repo_config);
if (GIT_REPO_VERSION < repository_format_version) {
if (!nongit_ok)
die ("Expected git repo version <= %d, found %d",
if (!is_git_directory(dir))
die("Not a git repository: %s", dir);
- path = make_absolute_path(dir);
+ path = real_path(dir);
free(buf);
return path;
}
+static const char *setup_explicit_git_dir(const char *gitdirenv,
+ char *cwd, int len,
+ int *nongit_ok)
+{
+ const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
+ const char *worktree;
+ char *gitfile;
+ int offset;
+
+ if (PATH_MAX - 40 < strlen(gitdirenv))
+ die("'$%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;
+ }
+
+ offset = dir_inside_of(cwd, 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';
+ free(gitfile);
+ return cwd + offset;
+ }
+
+ /* cwd outside worktree */
+ set_git_dir(gitdirenv);
+ free(gitfile);
+ return NULL;
+}
+
+static const char *setup_discovered_git_dir(const char *gitdir,
+ char *cwd, int offset, int len,
+ int *nongit_ok)
+{
+ if (check_repository_format_gently(gitdir, nongit_ok))
+ return NULL;
+
+ /* --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))
+ gitdir = xstrdup(real_path(gitdir));
+ if (chdir(cwd))
+ die_errno("Could not come back to cwd");
+ return setup_explicit_git_dir(gitdir, cwd, len, 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))
+ die_errno("Could not come back to cwd");
+ return NULL;
+ }
+
+ /* #0, #1, #5, #8, #9, #12, #13 */
+ set_git_work_tree(".");
+ if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
+ set_git_dir(gitdir);
+ inside_git_dir = 0;
+ inside_work_tree = 1;
+ 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;
+}
+
+/* #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)
+{
+ int root_len;
+
+ if (check_repository_format_gently(".", nongit_ok))
+ return NULL;
+
+ /* --work-tree is set without --git-dir; use discovered one */
+ if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
+ const char *gitdir;
+
+ gitdir = offset == len ? "." : xmemdupz(cwd, offset);
+ if (chdir(cwd))
+ die_errno("Could not come back to cwd");
+ return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+ }
+
+ inside_git_dir = 1;
+ inside_work_tree = 0;
+ if (offset != len) {
+ if (chdir(cwd))
+ 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);
+ }
+ else
+ set_git_dir(".");
+ return NULL;
+}
+
+static const char *setup_nongit(const char *cwd, int *nongit_ok)
+{
+ if (!nongit_ok)
+ die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
+ if (chdir(cwd))
+ die_errno("Cannot come back to cwd");
+ *nongit_ok = 1;
+ return NULL;
+}
+
+static dev_t get_device_or_die(const char *path, const char *prefix)
+{
+ struct stat buf;
+ if (stat(path, &buf))
+ die_errno("failed to stat '%s%s%s'",
+ prefix ? prefix : "",
+ prefix ? "/" : "", path);
+ return buf.st_dev;
+}
+
/*
* 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)
+static const char *setup_git_directory_gently_1(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;
+ 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 (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) {
- 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");
+ 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))
* - ../../.git/
* etc.
*/
- offset = len = strlen(cwd);
+ one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
+ if (one_filesystem)
+ current_device = get_device_or_die(".", NULL);
for (;;) {
- gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
- if (gitfile_dir) {
- if (set_git_dir(gitfile_dir))
- die("Repository setup failed");
- break;
+ 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 (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';
- set_git_dir(cwd);
- } else
- set_git_dir(".");
- check_repository_format_gently(nongit_ok);
- return NULL;
+
+ 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) {
- if (nongit_ok) {
- if (chdir(cwd))
- die_errno("Cannot come back to cwd");
- *nongit_ok = 1;
- return NULL;
+ 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);
}
- die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
}
- if (chdir(".."))
+ if (chdir("..")) {
+ cwd[offset] = '\0';
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;
+const char *setup_git_directory_gently(int *nongit_ok)
+{
+ const char *prefix;
- /* Make "offset" point to past the '/', and add a '/' at the end */
- offset++;
- cwd[len++] = '/';
- cwd[len] = 0;
- return cwd + offset;
+ prefix = setup_git_directory_gently_1(nongit_ok);
+ if (startup_info) {
+ startup_info->have_repository = !nongit_ok || !*nongit_ok;
+ startup_info->prefix = prefix;
+ }
+ return prefix;
}
int git_config_perm(const char *var, const char *value)
int check_repository_format(void)
{
- return check_repository_format_gently(NULL);
+ return check_repository_format_gently(get_git_dir(), NULL);
}
+/*
+ * Returns the "prefix", a path to the current working directory
+ * relative to the work tree root, or NULL, if the current working
+ * directory is not a strict subdirectory of the work tree root. The
+ * prefix always ends with a '/' character.
+ */
const char *setup_git_directory(void)
{
- const char *retval = setup_git_directory_gently(NULL);
-
- /* If the work tree is not the default one, recompute prefix */
- if (inside_work_tree < 0) {
- static char buffer[PATH_MAX + 1];
- char *rel;
- if (retval && chdir(retval))
- die_errno ("Could not jump back into original cwd");
- rel = get_relative_cwd(buffer, PATH_MAX, get_git_work_tree());
- if (rel && *rel && chdir(get_git_work_tree()))
- die_errno ("Could not jump to working directory");
- return rel && *rel ? strcat(rel, "/") : NULL;
- }
-
- return retval;
+ return setup_git_directory_gently(NULL);
}