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-rw-r--r--setup.c147
1 files changed, 118 insertions, 29 deletions
diff --git a/setup.c b/setup.c
index 465b42a1d7..1a374f2bf4 100644
--- a/setup.c
+++ b/setup.c
@@ -5,6 +5,7 @@
static int inside_git_dir = -1;
static int inside_work_tree = -1;
static int work_tree_config_is_bogus;
+static struct string_list unknown_extensions = STRING_LIST_INIT_DUP;
/*
* The input parameter must contain an absolute path, and it must already be
@@ -229,14 +230,21 @@ void verify_non_filename(const char *prefix, const char *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;
- 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)
@@ -352,10 +360,25 @@ void setup_work_tree(void)
static int check_repo_format(const char *var, const char *value, void *cb)
{
+ const char *ext;
+
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 (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"))
+ repository_format_precious_objects = git_config_bool(var, value);
+ else
+ string_list_append(&unknown_extensions, ext);
+ }
return 0;
}
@@ -366,6 +389,8 @@ static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
config_fn_t fn;
int ret = 0;
+ string_list_clear(&unknown_extensions, 0);
+
if (get_common_dir(&sb, gitdir))
fn = check_repo_format;
else
@@ -383,16 +408,31 @@ static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
* is a good one.
*/
git_config_early(fn, NULL, repo_config);
- if (GIT_REPO_VERSION < repository_format_version) {
+ if (GIT_REPO_VERSION_READ < repository_format_version) {
if (!nongit_ok)
die ("Expected git repo version <= %d, found %d",
- GIT_REPO_VERSION, repository_format_version);
+ GIT_REPO_VERSION_READ, repository_format_version);
warning("Expected git repo version <= %d, found %d",
- GIT_REPO_VERSION, repository_format_version);
+ GIT_REPO_VERSION_READ, repository_format_version);
warning("Please upgrade Git");
*nongit_ok = -1;
ret = -1;
}
+
+ if (repository_format_version >= 1 && unknown_extensions.nr) {
+ int i;
+
+ if (!nongit_ok)
+ die("unknown repository extension: %s",
+ unknown_extensions.items[0].string);
+
+ for (i = 0; i < unknown_extensions.nr; i++)
+ warning("unknown repository extension: %s",
+ unknown_extensions.items[i].string);
+ *nongit_ok = -1;
+ ret = -1;
+ }
+
strbuf_release(&sb);
return ret;
}
@@ -404,42 +444,65 @@ static void update_linked_gitdir(const char *gitfile, const char *gitdir)
strbuf_addf(&path, "%s/gitdir", gitdir);
if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL))
- write_file(path.buf, 1, "%s\n", gitfile);
+ write_file(path.buf, "%s", gitfile);
strbuf_release(&path);
}
/*
* Try to read the location of the git directory from the .git file,
* return path to git directory if found.
+ *
+ * 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)) {
+ 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);
+ if (fd < 0) {
+ error_code = READ_GITFILE_ERR_OPEN_FAILED;
+ goto cleanup_return;
+ }
buf = xmalloc(st.st_size + 1);
len = read_in_full(fd, buf, st.st_size);
close(fd);
- if (len != st.st_size)
- die("Error reading %s", path);
+ if (len != st.st_size) {
+ error_code = READ_GITFILE_ERR_READ_FAILED;
+ goto cleanup_return;
+ }
buf[len] = '\0';
- if (!starts_with(buf, "gitdir: "))
- die("Invalid gitfile format: %s", path);
+ 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;
@@ -453,15 +516,41 @@ const char *read_gitfile(const char *path)
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;
+ }
update_linked_gitdir(path, dir);
path = real_path(dir);
+cleanup_return:
+ if (return_error_code)
+ *return_error_code = error_code;
+ else if (error_code) {
+ 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:
+ assert(0);
+ }
+ }
+
free(buf);
- return path;
+ return error_code ? NULL : path;
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 04:03:07 +0000