#include "cache.h"
+#include "repository.h"
+#include "config.h"
#include "dir.h"
#include "string-list.h"
+#include "chdir-notify.h"
+#include "promisor-remote.h"
static int inside_git_dir = -1;
static int inside_work_tree = -1;
static int work_tree_config_is_bogus;
+static struct startup_info the_startup_info;
+struct startup_info *startup_info = &the_startup_info;
+
/*
* The input parameter must contain an absolute path, and it must already be
* normalized.
off = offset_1st_component(path);
/* check if work tree is already the prefix */
- if (wtlen <= len && !strncmp(path, work_tree, wtlen)) {
+ if (wtlen <= len && !fspathncmp(path, work_tree, wtlen)) {
if (path[wtlen] == '/') {
memmove(path, path + wtlen + 1, len - wtlen);
return 0;
path++;
if (*path == '/') {
*path = '\0';
- if (strcmp(real_path(path0), work_tree) == 0) {
+ if (fspathcmp(real_path(path0), work_tree) == 0) {
memmove(path0, path + 1, len - (path - path0));
return 0;
}
}
/* check whole path */
- if (strcmp(real_path(path0), work_tree) == 0) {
+ if (fspathcmp(real_path(path0), work_tree) == 0) {
*path0 = '\0';
return 0;
}
const char *orig = path;
char *sanitized;
if (is_absolute_path(orig)) {
- sanitized = xmalloc(strlen(path) + 1);
+ sanitized = xmallocz(strlen(path));
if (remaining_prefix)
*remaining_prefix = 0;
if (normalize_path_copy_len(sanitized, path, remaining_prefix)) {
return NULL;
}
} else {
- sanitized = xmalloc(len + strlen(path) + 1);
- if (len)
- memcpy(sanitized, prefix, len);
- strcpy(sanitized + len, path);
+ sanitized = xstrfmt("%.*s%s", len, len ? prefix : "", path);
if (remaining_prefix)
*remaining_prefix = len;
if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) {
{
char *r = prefix_path_gently(prefix, len, NULL, path);
if (!r)
- die("'%s' is outside repository", path);
+ die(_("'%s' is outside repository"), path);
return r;
}
int check_filename(const char *prefix, const char *arg)
{
- const char *name;
+ char *to_free = NULL;
struct stat st;
- if (starts_with(arg, ":/")) {
- if (arg[2] == '\0') /* ":/" is root dir, always exists */
+ if (skip_prefix(arg, ":/", &arg)) {
+ if (!*arg) /* ":/" is root dir, always exists */
return 1;
- name = arg + 2;
- } else if (prefix)
- name = prefix_filename(prefix, strlen(prefix), arg);
- else
- name = arg;
- if (!lstat(name, &st))
+ prefix = NULL;
+ } else if (skip_prefix(arg, ":!", &arg) ||
+ skip_prefix(arg, ":^", &arg)) {
+ if (!*arg) /* excluding everything is silly, but allowed */
+ return 1;
+ }
+
+ if (prefix)
+ arg = to_free = prefix_filename(prefix, arg);
+
+ if (!lstat(arg, &st)) {
+ free(to_free);
return 1; /* file exists */
- if (errno == ENOENT || errno == ENOTDIR)
+ }
+ if (is_missing_file_error(errno)) {
+ free(to_free);
return 0; /* file does not exist */
- die_errno("failed to stat '%s'", arg);
+ }
+ die_errno(_("failed to stat '%s'"), arg);
}
-static void NORETURN die_verify_filename(const char *prefix,
+static void NORETURN die_verify_filename(struct repository *r,
+ const char *prefix,
const char *arg,
int diagnose_misspelt_rev)
{
if (!diagnose_misspelt_rev)
- die("%s: no such path in the working tree.\n"
- "Use 'git <command> -- <path>...' to specify paths that do not exist locally.",
+ die(_("%s: no such path in the working tree.\n"
+ "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
arg);
/*
* Saying "'(icase)foo' does not exist in the index" when the
* let maybe_die_on_misspelt_object_name() even trigger.
*/
if (!(arg[0] == ':' && !isalnum(arg[1])))
- maybe_die_on_misspelt_object_name(arg, prefix);
+ maybe_die_on_misspelt_object_name(r, arg, prefix);
/* ... or fall back the most general message. */
- die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
- "Use '--' to separate paths from revisions, like this:\n"
- "'git <command> [<revision>...] -- [<file>...]'", arg);
+ die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
+ "Use '--' to separate paths from revisions, like this:\n"
+ "'git <command> [<revision>...] -- [<file>...]'"), arg);
+
+}
+
+/*
+ * Check for arguments that don't resolve as actual files,
+ * but which look sufficiently like pathspecs that we'll consider
+ * them such for the purposes of rev/pathspec DWIM parsing.
+ */
+static int looks_like_pathspec(const char *arg)
+{
+ /* anything with a wildcard character */
+ if (!no_wildcard(arg))
+ return 1;
+
+ /* long-form pathspec magic */
+ if (starts_with(arg, ":("))
+ return 1;
+ return 0;
}
/*
int diagnose_misspelt_rev)
{
if (*arg == '-')
- die("bad flag '%s' used after filename", arg);
- if (check_filename(prefix, arg))
+ die(_("option '%s' must come before non-option arguments"), arg);
+ if (looks_like_pathspec(arg) || check_filename(prefix, arg))
return;
- die_verify_filename(prefix, arg, diagnose_misspelt_rev);
+ die_verify_filename(the_repository, prefix, arg, diagnose_misspelt_rev);
}
/*
return; /* flag */
if (!check_filename(prefix, arg))
return;
- die("ambiguous argument '%s': both revision and filename\n"
- "Use '--' to separate paths from revisions, like this:\n"
- "'git <command> [<revision>...] -- [<file>...]'", arg);
+ die(_("ambiguous argument '%s': both revision and filename\n"
+ "Use '--' to separate paths from revisions, like this:\n"
+ "'git <command> [<revision>...] -- [<file>...]'"), arg);
+}
+
+int get_common_dir(struct strbuf *sb, const char *gitdir)
+{
+ const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
+ if (git_env_common_dir) {
+ strbuf_addstr(sb, git_env_common_dir);
+ return 1;
+ } else {
+ return get_common_dir_noenv(sb, gitdir);
+ }
}
+int get_common_dir_noenv(struct strbuf *sb, const char *gitdir)
+{
+ struct strbuf data = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ int ret = 0;
+
+ 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_add_real_path(sb, 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;
+
+ /* Check worktree-related signatures */
+ strbuf_addstr(&path, suspect);
+ strbuf_complete(&path, '/');
+ strbuf_addstr(&path, "HEAD");
+ if (validate_headref(path.buf))
+ goto done;
- if (PATH_MAX <= len + strlen("/objects"))
- die("Too long path: %.*s", 60, suspect);
- strcpy(path, suspect);
+ 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;
+ ret = 1;
+done:
+ strbuf_release(&path);
+ return ret;
+}
- return 1;
+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;
}
int is_inside_git_dir(void)
void setup_work_tree(void)
{
- const char *work_tree, *git_dir;
+ const char *work_tree;
static int initialized = 0;
if (initialized)
return;
if (work_tree_config_is_bogus)
- die("unable to set up work tree using invalid config");
+ die(_("unable to set up work tree using invalid config"));
work_tree = get_git_work_tree();
- git_dir = get_git_dir();
- if (!is_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");
+ if (!work_tree || chdir_notify(work_tree))
+ die(_("this operation must be run in a work tree"));
/*
* Make sure subsequent git processes find correct worktree
if (getenv(GIT_WORK_TREE_ENVIRONMENT))
setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
- set_git_dir(remove_leading_path(git_dir, work_tree));
initialized = 1;
}
-static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
+static int read_worktree_config(const char *var, const char *value, void *vdata)
+{
+ struct repository_format *data = vdata;
+
+ if (strcmp(var, "core.bare") == 0) {
+ data->is_bare = git_config_bool(var, value);
+ } else if (strcmp(var, "core.worktree") == 0) {
+ if (!value)
+ return config_error_nonbool(var);
+ free(data->work_tree);
+ data->work_tree = xstrdup(value);
+ }
+ return 0;
+}
+
+static int check_repo_format(const char *var, const char *value, void *vdata)
+{
+ struct repository_format *data = vdata;
+ const char *ext;
+
+ if (strcmp(var, "core.repositoryformatversion") == 0)
+ data->version = git_config_int(var, value);
+ else if (skip_prefix(var, "extensions.", &ext)) {
+ /*
+ * record any known extensions here; otherwise,
+ * we fall through to recording it as unknown, and
+ * check_repository_format will complain
+ */
+ if (!strcmp(ext, "noop"))
+ ;
+ else if (!strcmp(ext, "preciousobjects"))
+ data->precious_objects = git_config_bool(var, value);
+ else if (!strcmp(ext, "partialclone")) {
+ if (!value)
+ return config_error_nonbool(var);
+ data->partial_clone = xstrdup(value);
+ } else if (!strcmp(ext, "worktreeconfig"))
+ data->worktree_config = git_config_bool(var, value);
+ else
+ string_list_append(&data->unknown_extensions, ext);
+ }
+
+ return read_worktree_config(var, value, vdata);
+}
+
+static int check_repository_format_gently(const char *gitdir, struct repository_format *candidate, int *nongit_ok)
{
- char repo_config[PATH_MAX+1];
+ struct strbuf sb = STRBUF_INIT;
+ struct strbuf err = STRBUF_INIT;
+ int has_common;
+
+ has_common = get_common_dir(&sb, gitdir);
+ strbuf_addstr(&sb, "/config");
+ read_repository_format(candidate, sb.buf);
+ strbuf_release(&sb);
/*
- * 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.
+ * For historical use of check_repository_format() in git-init,
+ * we treat a missing config as a silent "ok", even when nongit_ok
+ * is unset.
*/
- 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",
- GIT_REPO_VERSION, repository_format_version);
- warning("Expected git repo version <= %d, found %d",
- GIT_REPO_VERSION, repository_format_version);
- warning("Please upgrade Git");
- *nongit_ok = -1;
+ if (candidate->version < 0)
+ return 0;
+
+ if (verify_repository_format(candidate, &err) < 0) {
+ if (nongit_ok) {
+ warning("%s", err.buf);
+ strbuf_release(&err);
+ *nongit_ok = -1;
+ return -1;
+ }
+ die("%s", err.buf);
+ }
+
+ repository_format_precious_objects = candidate->precious_objects;
+ set_repository_format_partial_clone(candidate->partial_clone);
+ repository_format_worktree_config = candidate->worktree_config;
+ string_list_clear(&candidate->unknown_extensions, 0);
+
+ if (repository_format_worktree_config) {
+ /*
+ * pick up core.bare and core.worktree from per-worktree
+ * config if present
+ */
+ strbuf_addf(&sb, "%s/config.worktree", gitdir);
+ git_config_from_file(read_worktree_config, sb.buf, candidate);
+ strbuf_release(&sb);
+ has_common = 0;
+ }
+
+ if (!has_common) {
+ if (candidate->is_bare != -1) {
+ is_bare_repository_cfg = candidate->is_bare;
+ if (is_bare_repository_cfg == 1)
+ inside_work_tree = -1;
+ }
+ if (candidate->work_tree) {
+ free(git_work_tree_cfg);
+ git_work_tree_cfg = xstrdup(candidate->work_tree);
+ inside_work_tree = -1;
+ }
+ }
+
+ return 0;
+}
+
+static void init_repository_format(struct repository_format *format)
+{
+ const struct repository_format fresh = REPOSITORY_FORMAT_INIT;
+
+ memcpy(format, &fresh, sizeof(fresh));
+}
+
+int read_repository_format(struct repository_format *format, const char *path)
+{
+ clear_repository_format(format);
+ git_config_from_file(check_repo_format, path, format);
+ if (format->version == -1)
+ clear_repository_format(format);
+ return format->version;
+}
+
+void clear_repository_format(struct repository_format *format)
+{
+ string_list_clear(&format->unknown_extensions, 0);
+ free(format->work_tree);
+ free(format->partial_clone);
+ init_repository_format(format);
+}
+
+int verify_repository_format(const struct repository_format *format,
+ struct strbuf *err)
+{
+ if (GIT_REPO_VERSION_READ < format->version) {
+ strbuf_addf(err, _("Expected git repo version <= %d, found %d"),
+ GIT_REPO_VERSION_READ, format->version);
+ return -1;
+ }
+
+ if (format->version >= 1 && format->unknown_extensions.nr) {
+ int i;
+
+ strbuf_addstr(err, _("unknown repository extensions found:"));
+
+ for (i = 0; i < format->unknown_extensions.nr; i++)
+ strbuf_addf(err, "\n\t%s",
+ format->unknown_extensions.items[i].string);
return -1;
}
+
return 0;
}
+void read_gitfile_error_die(int error_code, const char *path, const char *dir)
+{
+ switch (error_code) {
+ case READ_GITFILE_ERR_STAT_FAILED:
+ case READ_GITFILE_ERR_NOT_A_FILE:
+ /* non-fatal; follow return path */
+ break;
+ case READ_GITFILE_ERR_OPEN_FAILED:
+ die_errno(_("error opening '%s'"), path);
+ case READ_GITFILE_ERR_TOO_LARGE:
+ die(_("too large to be a .git file: '%s'"), path);
+ case READ_GITFILE_ERR_READ_FAILED:
+ die(_("error reading %s"), path);
+ case READ_GITFILE_ERR_INVALID_FORMAT:
+ die(_("invalid gitfile format: %s"), path);
+ case READ_GITFILE_ERR_NO_PATH:
+ die(_("no path in gitfile: %s"), path);
+ case READ_GITFILE_ERR_NOT_A_REPO:
+ die(_("not a git repository: %s"), dir);
+ default:
+ BUG("unknown error code");
+ }
+}
+
/*
* Try to read the location of the git directory from the .git file,
- * return path to git directory if found.
+ * return path to git directory if found. The return value comes from
+ * a shared buffer.
+ *
+ * On failure, if return_error_code is not NULL, return_error_code
+ * will be set to an error code and NULL will be returned. If
+ * return_error_code is NULL the function will die instead (for most
+ * cases).
*/
-const char *read_gitfile(const char *path)
+const char *read_gitfile_gently(const char *path, int *return_error_code)
{
- char *buf;
- char *dir;
+ const int max_file_size = 1 << 20; /* 1MB */
+ int error_code = 0;
+ char *buf = NULL;
+ char *dir = NULL;
const char *slash;
struct stat st;
int fd;
ssize_t len;
- if (stat(path, &st))
- return NULL;
- if (!S_ISREG(st.st_mode))
- return NULL;
+ if (stat(path, &st)) {
+ /* NEEDSWORK: discern between ENOENT vs other errors */
+ error_code = READ_GITFILE_ERR_STAT_FAILED;
+ goto cleanup_return;
+ }
+ if (!S_ISREG(st.st_mode)) {
+ error_code = READ_GITFILE_ERR_NOT_A_FILE;
+ goto cleanup_return;
+ }
+ if (st.st_size > max_file_size) {
+ error_code = READ_GITFILE_ERR_TOO_LARGE;
+ goto cleanup_return;
+ }
fd = open(path, O_RDONLY);
- if (fd < 0)
- die_errno("Error opening '%s'", path);
- buf = xmalloc(st.st_size + 1);
+ if (fd < 0) {
+ error_code = READ_GITFILE_ERR_OPEN_FAILED;
+ goto cleanup_return;
+ }
+ buf = xmallocz(st.st_size);
len = read_in_full(fd, buf, st.st_size);
close(fd);
- if (len != st.st_size)
- die("Error reading %s", path);
- buf[len] = '\0';
- if (!starts_with(buf, "gitdir: "))
- die("Invalid gitfile format: %s", path);
+ if (len != st.st_size) {
+ error_code = READ_GITFILE_ERR_READ_FAILED;
+ goto cleanup_return;
+ }
+ if (!starts_with(buf, "gitdir: ")) {
+ error_code = READ_GITFILE_ERR_INVALID_FORMAT;
+ goto cleanup_return;
+ }
while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
len--;
- if (len < 9)
- die("No path in gitfile: %s", path);
+ if (len < 9) {
+ error_code = READ_GITFILE_ERR_NO_PATH;
+ goto cleanup_return;
+ }
buf[len] = '\0';
dir = buf + 8;
if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
size_t pathlen = slash+1 - path;
- size_t dirlen = pathlen + len - 8;
- dir = xmalloc(dirlen + 1);
- strncpy(dir, path, pathlen);
- strncpy(dir + pathlen, buf + 8, len - 8);
- dir[dirlen] = '\0';
+ dir = xstrfmt("%.*s%.*s", (int)pathlen, path,
+ (int)(len - 8), buf + 8);
free(buf);
buf = dir;
}
-
- if (!is_git_directory(dir))
- die("Not a git repository: %s", dir);
+ if (!is_git_directory(dir)) {
+ error_code = READ_GITFILE_ERR_NOT_A_REPO;
+ goto cleanup_return;
+ }
path = real_path(dir);
+cleanup_return:
+ if (return_error_code)
+ *return_error_code = error_code;
+ else if (error_code)
+ read_gitfile_error_die(error_code, path, dir);
+
free(buf);
- return path;
+ return error_code ? NULL : path;
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
struct strbuf *cwd,
+ struct repository_format *repo_fmt,
int *nongit_ok)
{
const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
int offset;
if (PATH_MAX - 40 < strlen(gitdirenv))
- die("'$%s' too big", GIT_DIR_ENVIRONMENT);
+ die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT);
gitfile = (char*)read_gitfile(gitdirenv);
if (gitfile) {
free(gitfile);
return NULL;
}
- die("Not a git repository: '%s'", gitdirenv);
+ die(_("not a git repository: '%s'"), gitdirenv);
}
- if (check_repository_format_gently(gitdirenv, nongit_ok)) {
+ if (check_repository_format_gently(gitdirenv, repo_fmt, nongit_ok)) {
free(gitfile);
return NULL;
}
else {
char *core_worktree;
if (chdir(gitdirenv))
- die_errno("Could not chdir to '%s'", gitdirenv);
+ die_errno(_("cannot chdir to '%s'"), gitdirenv);
if (chdir(git_work_tree_cfg))
- die_errno("Could not chdir to '%s'", git_work_tree_cfg);
+ die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg);
core_worktree = xgetcwd();
if (chdir(cwd->buf))
- die_errno("Could not come back to cwd");
+ die_errno(_("cannot come back to cwd"));
set_git_work_tree(core_worktree);
free(core_worktree);
}
if (offset >= 0) { /* cwd inside worktree? */
set_git_dir(real_path(gitdirenv));
if (chdir(worktree))
- die_errno("Could not chdir to '%s'", worktree);
+ die_errno(_("cannot chdir to '%s'"), worktree);
strbuf_addch(cwd, '/');
free(gitfile);
return cwd->buf + offset;
static const char *setup_discovered_git_dir(const char *gitdir,
struct strbuf *cwd, int offset,
+ struct repository_format *repo_fmt,
int *nongit_ok)
{
- if (check_repository_format_gently(gitdir, nongit_ok))
+ if (check_repository_format_gently(gitdir, repo_fmt, nongit_ok))
return NULL;
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
+ char *to_free = NULL;
+ const char *ret;
+
if (offset != cwd->len && !is_absolute_path(gitdir))
- gitdir = xstrdup(real_path(gitdir));
+ gitdir = to_free = real_pathdup(gitdir, 1);
if (chdir(cwd->buf))
- die_errno("Could not come back to cwd");
- return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
+ die_errno(_("cannot come back to cwd"));
+ ret = setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok);
+ free(to_free);
+ return ret;
}
/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
if (is_bare_repository_cfg > 0) {
set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
if (chdir(cwd->buf))
- die_errno("Could not come back to cwd");
+ die_errno(_("cannot come back to cwd"));
return NULL;
}
set_git_dir(gitdir);
inside_git_dir = 0;
inside_work_tree = 1;
- if (offset == cwd->len)
+ if (offset >= cwd->len)
return NULL;
- /* Make "offset" point to past the '/', and add a '/' at the end */
- offset++;
+ /* Make "offset" point past the '/' (already the case for root dirs) */
+ if (offset != offset_1st_component(cwd->buf))
+ offset++;
+ /* Add a '/' at the end */
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(struct strbuf *cwd, int offset,
+ struct repository_format *repo_fmt,
int *nongit_ok)
{
int root_len;
- if (check_repository_format_gently(".", nongit_ok))
+ if (check_repository_format_gently(".", repo_fmt, nongit_ok))
return NULL;
setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
- const char *gitdir;
+ static const char *gitdir;
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, nongit_ok);
+ die_errno(_("cannot come back to cwd"));
+ return setup_explicit_git_dir(gitdir, cwd, repo_fmt, nongit_ok);
}
inside_git_dir = 1;
inside_work_tree = 0;
if (offset != cwd->len) {
if (chdir(cwd->buf))
- die_errno("Cannot come back to cwd");
+ die_errno(_("cannot come back to cwd"));
root_len = offset_1st_component(cwd->buf);
strbuf_setlen(cwd, offset > root_len ? offset : root_len);
set_git_dir(cwd->buf);
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, int prefix_len)
{
struct stat buf;
if (stat(path, &buf)) {
- die_errno("failed to stat '%*s%s%s'",
+ die_errno(_("failed to stat '%*s%s%s'"),
prefix_len,
prefix ? prefix : "",
prefix ? "/" : "", path);
/* Keep entry but do not canonicalize it */
return 1;
} else {
- const char *real_path = real_path_if_valid(ceil);
- if (!real_path)
+ char *real_path = real_pathdup(ceil, 0);
+ if (!real_path) {
return 0;
+ }
free(item->string);
- item->string = xstrdup(real_path);
+ item->string = real_path;
return 1;
}
}
+enum discovery_result {
+ GIT_DIR_NONE = 0,
+ GIT_DIR_EXPLICIT,
+ GIT_DIR_DISCOVERED,
+ GIT_DIR_BARE,
+ /* these are errors */
+ GIT_DIR_HIT_CEILING = -1,
+ GIT_DIR_HIT_MOUNT_POINT = -2,
+ GIT_DIR_INVALID_GITFILE = -3
+};
+
/*
* 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.
+ *
+ * Also, we avoid changing any global state (such as the current working
+ * directory) to allow early callers.
+ *
+ * The directory where the search should start needs to be passed in via the
+ * `dir` parameter; upon return, the `dir` buffer will contain the path of
+ * the directory where the search ended, and `gitdir` will contain the path of
+ * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
+ * is relative to `dir` (i.e. *not* necessarily the cwd).
*/
-static const char *setup_git_directory_gently_1(int *nongit_ok)
+static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir,
+ struct strbuf *gitdir,
+ int die_on_error)
{
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
- static struct strbuf cwd = STRBUF_INIT;
- const char *gitdirenv, *ret;
- char *gitfile;
- int offset, offset_parent, ceil_offset = -1;
+ const char *gitdirenv;
+ int ceil_offset = -1, min_offset = offset_1st_component(dir->buf);
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
- * updated accordingly.
- */
- if (nongit_ok)
- *nongit_ok = 0;
-
- if (strbuf_getcwd(&cwd))
- die_errno("Unable to read current working directory");
- offset = cwd.len;
-
- /*
* 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, nongit_ok);
+ if (gitdirenv) {
+ strbuf_addstr(gitdir, gitdirenv);
+ return GIT_DIR_EXPLICIT;
+ }
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.buf, &ceiling_dirs);
+ ceil_offset = longest_ancestor_length(dir->buf, &ceiling_dirs);
string_list_clear(&ceiling_dirs, 0);
}
- if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
- ceil_offset = 1;
+ if (ceil_offset < 0)
+ ceil_offset = min_offset - 2;
+
+ if (min_offset && min_offset == dir->len &&
+ !is_dir_sep(dir->buf[min_offset - 1])) {
+ strbuf_addch(dir, '/');
+ min_offset++;
+ }
/*
- * Test in the following order (relative to the cwd):
+ * Test in the following order (relative to the dir):
* - .git (file containing "gitdir: <path>")
* - .git/
* - ./ (bare)
* - ../.git
* - ../.git/
* - ../ (bare)
- * - ../../.git/
+ * - ../../.git
* etc.
*/
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
if (one_filesystem)
- current_device = get_device_or_die(".", NULL, 0);
+ current_device = get_device_or_die(dir->buf, NULL, 0);
for (;;) {
- gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
- if (gitfile)
- gitdirenv = gitfile = xstrdup(gitfile);
- else {
- if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
- gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
+ int offset = dir->len, error_code = 0;
+
+ if (offset > min_offset)
+ strbuf_addch(dir, '/');
+ strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT);
+ gitdirenv = read_gitfile_gently(dir->buf, die_on_error ?
+ NULL : &error_code);
+ if (!gitdirenv) {
+ if (die_on_error ||
+ error_code == READ_GITFILE_ERR_NOT_A_FILE) {
+ /* NEEDSWORK: fail if .git is not file nor dir */
+ if (is_git_directory(dir->buf))
+ gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
+ } else if (error_code != READ_GITFILE_ERR_STAT_FAILED)
+ return GIT_DIR_INVALID_GITFILE;
}
-
+ strbuf_setlen(dir, offset);
if (gitdirenv) {
- ret = setup_discovered_git_dir(gitdirenv,
- &cwd, offset,
- nongit_ok);
- free(gitfile);
- return ret;
+ strbuf_addstr(gitdir, gitdirenv);
+ return GIT_DIR_DISCOVERED;
}
- free(gitfile);
- if (is_git_directory("."))
- return setup_bare_git_dir(&cwd, offset, nongit_ok);
-
- offset_parent = offset;
- while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
- if (offset_parent <= ceil_offset)
- return setup_nongit(cwd.buf, nongit_ok);
- if (one_filesystem) {
- dev_t parent_device = get_device_or_die("..", cwd.buf,
- offset);
- if (parent_device != current_device) {
- if (nongit_ok) {
- if (chdir(cwd.buf))
- die_errno("Cannot come back to cwd");
- *nongit_ok = 1;
- return NULL;
- }
- 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.buf);
- }
- }
- if (chdir("..")) {
- strbuf_setlen(&cwd, offset);
- die_errno("Cannot change to '%s/..'", cwd.buf);
+ if (is_git_directory(dir->buf)) {
+ strbuf_addstr(gitdir, ".");
+ return GIT_DIR_BARE;
}
- offset = offset_parent;
+
+ if (offset <= min_offset)
+ return GIT_DIR_HIT_CEILING;
+
+ while (--offset > ceil_offset && !is_dir_sep(dir->buf[offset]))
+ ; /* continue */
+ if (offset <= ceil_offset)
+ return GIT_DIR_HIT_CEILING;
+
+ strbuf_setlen(dir, offset > min_offset ? offset : min_offset);
+ if (one_filesystem &&
+ current_device != get_device_or_die(dir->buf, NULL, offset))
+ return GIT_DIR_HIT_MOUNT_POINT;
}
}
+int discover_git_directory(struct strbuf *commondir,
+ struct strbuf *gitdir)
+{
+ struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT;
+ size_t gitdir_offset = gitdir->len, cwd_len;
+ size_t commondir_offset = commondir->len;
+ struct repository_format candidate = REPOSITORY_FORMAT_INIT;
+
+ if (strbuf_getcwd(&dir))
+ return -1;
+
+ cwd_len = dir.len;
+ if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) {
+ strbuf_release(&dir);
+ return -1;
+ }
+
+ /*
+ * The returned gitdir is relative to dir, and if dir does not reflect
+ * the current working directory, we simply make the gitdir absolute.
+ */
+ if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) {
+ /* Avoid a trailing "/." */
+ if (!strcmp(".", gitdir->buf + gitdir_offset))
+ strbuf_setlen(gitdir, gitdir_offset);
+ else
+ strbuf_addch(&dir, '/');
+ strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len);
+ }
+
+ get_common_dir(commondir, gitdir->buf + gitdir_offset);
+
+ strbuf_reset(&dir);
+ strbuf_addf(&dir, "%s/config", commondir->buf + commondir_offset);
+ read_repository_format(&candidate, dir.buf);
+ strbuf_release(&dir);
+
+ if (verify_repository_format(&candidate, &err) < 0) {
+ warning("ignoring git dir '%s': %s",
+ gitdir->buf + gitdir_offset, err.buf);
+ strbuf_release(&err);
+ strbuf_setlen(commondir, commondir_offset);
+ strbuf_setlen(gitdir, gitdir_offset);
+ clear_repository_format(&candidate);
+ return -1;
+ }
+
+ clear_repository_format(&candidate);
+ return 0;
+}
+
const char *setup_git_directory_gently(int *nongit_ok)
{
- const char *prefix;
+ static struct strbuf cwd = STRBUF_INIT;
+ struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT;
+ const char *prefix = NULL;
+ struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT;
- prefix = setup_git_directory_gently_1(nongit_ok);
- if (prefix)
- setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
- else
- setenv(GIT_PREFIX_ENVIRONMENT, "", 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
+ * updated accordingly.
+ */
+ if (nongit_ok)
+ *nongit_ok = 0;
+
+ if (strbuf_getcwd(&cwd))
+ die_errno(_("Unable to read current working directory"));
+ strbuf_addbuf(&dir, &cwd);
+
+ switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) {
+ case GIT_DIR_EXPLICIT:
+ prefix = setup_explicit_git_dir(gitdir.buf, &cwd, &repo_fmt, nongit_ok);
+ break;
+ case GIT_DIR_DISCOVERED:
+ if (dir.len < cwd.len && chdir(dir.buf))
+ die(_("cannot change to '%s'"), dir.buf);
+ prefix = setup_discovered_git_dir(gitdir.buf, &cwd, dir.len,
+ &repo_fmt, nongit_ok);
+ break;
+ case GIT_DIR_BARE:
+ if (dir.len < cwd.len && chdir(dir.buf))
+ die(_("cannot change to '%s'"), dir.buf);
+ prefix = setup_bare_git_dir(&cwd, dir.len, &repo_fmt, nongit_ok);
+ break;
+ case GIT_DIR_HIT_CEILING:
+ if (!nongit_ok)
+ die(_("not a git repository (or any of the parent directories): %s"),
+ DEFAULT_GIT_DIR_ENVIRONMENT);
+ *nongit_ok = 1;
+ break;
+ case GIT_DIR_HIT_MOUNT_POINT:
+ if (!nongit_ok)
+ die(_("not a git repository (or any parent up to mount point %s)\n"
+ "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
+ dir.buf);
+ *nongit_ok = 1;
+ break;
+ case GIT_DIR_NONE:
+ /*
+ * As a safeguard against setup_git_directory_gently_1 returning
+ * this value, fallthrough to BUG. Otherwise it is possible to
+ * set startup_info->have_repository to 1 when we did nothing to
+ * find a repository.
+ */
+ default:
+ BUG("unhandled setup_git_directory_1() result");
+ }
- if (startup_info) {
- startup_info->have_repository = !nongit_ok || !*nongit_ok;
+ /*
+ * At this point, nongit_ok is stable. If it is non-NULL and points
+ * to a non-zero value, then this means that we haven't found a
+ * repository and that the caller expects startup_info to reflect
+ * this.
+ *
+ * Regardless of the state of nongit_ok, startup_info->prefix and
+ * the GIT_PREFIX environment variable must always match. For details
+ * see Documentation/config/alias.txt.
+ */
+ if (nongit_ok && *nongit_ok) {
+ startup_info->have_repository = 0;
+ startup_info->prefix = NULL;
+ setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
+ } else {
+ startup_info->have_repository = 1;
startup_info->prefix = prefix;
+ if (prefix)
+ setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
+ else
+ setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
}
+
+ /*
+ * Not all paths through the setup code will call 'set_git_dir()' (which
+ * directly sets up the environment) so in order to guarantee that the
+ * environment is in a consistent state after setup, explicitly setup
+ * the environment if we have a repository.
+ *
+ * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some
+ * code paths so we also need to explicitly setup the environment if
+ * the user has set GIT_DIR. It may be beneficial to disallow bogus
+ * GIT_DIR values at some point in the future.
+ */
+ if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */
+ startup_info->have_repository ||
+ /* GIT_DIR_EXPLICIT */
+ getenv(GIT_DIR_ENVIRONMENT)) {
+ if (!the_repository->gitdir) {
+ const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
+ if (!gitdir)
+ gitdir = DEFAULT_GIT_DIR_ENVIRONMENT;
+ setup_git_env(gitdir);
+ }
+ if (startup_info->have_repository)
+ repo_set_hash_algo(the_repository, repo_fmt.hash_algo);
+ }
+
+ strbuf_release(&dir);
+ strbuf_release(&gitdir);
+ clear_repository_format(&repo_fmt);
+
return prefix;
}
/* A filemode value was given: 0xxx */
if ((i & 0600) != 0600)
- die("Problem with core.sharedRepository filemode value "
+ die(_("problem with core.sharedRepository filemode value "
"(0%.3o).\nThe owner of files must always have "
- "read and write permissions.", i);
+ "read and write permissions."), i);
/*
* Mask filemode value. Others can not get write permission.
return -(i & 0666);
}
-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) {
- is_bare_repository_cfg = git_config_bool(var, value);
- if (is_bare_repository_cfg == 1)
- inside_work_tree = -1;
- } else if (strcmp(var, "core.worktree") == 0) {
- if (!value)
- return config_error_nonbool(var);
- free(git_work_tree_cfg);
- git_work_tree_cfg = xstrdup(value);
- inside_work_tree = -1;
- }
- return 0;
-}
-
-int check_repository_format(void)
+void check_repository_format(void)
{
- return check_repository_format_gently(get_git_dir(), NULL);
+ struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT;
+ check_repository_format_gently(get_git_dir(), &repo_fmt, NULL);
+ startup_info->have_repository = 1;
+ clear_repository_format(&repo_fmt);
}
/*
return setup_git_directory_gently(NULL);
}
-const char *resolve_gitdir(const char *suspect)
+const char *resolve_gitdir_gently(const char *suspect, int *return_error_code)
{
if (is_git_directory(suspect))
return suspect;
- return read_gitfile(suspect);
+ return read_gitfile_gently(suspect, return_error_code);
}
/* if any standard file descriptor is missing open it to /dev/null */
while (fd != -1 && fd < 2)
fd = dup(fd);
if (fd == -1)
- die_errno("open /dev/null or dup failed");
+ die_errno(_("open /dev/null or dup failed"));
if (fd > 2)
close(fd);
}
case 0:
break;
case -1:
- die_errno("fork failed");
+ die_errno(_("fork failed"));
default:
exit(0);
}
if (setsid() == -1)
- die_errno("setsid failed");
+ die_errno(_("setsid failed"));
close(0);
close(1);
close(2);
projects / platform / upstream / git.git / blobdiff