static int inside_git_dir = -1;
static int inside_work_tree = -1;
-const char *prefix_path(const char *prefix, int len, const char *path)
+static int sanitary_path_copy(char *dst, const char *src)
{
- const char *orig = path;
+ char *dst0 = dst;
+
+ if (*src == '/') {
+ *dst++ = '/';
+ while (*src == '/')
+ src++;
+ }
+
for (;;) {
- char c;
- if (*path != '.')
- break;
- c = path[1];
- /* "." */
- if (!c) {
- path++;
- break;
+ char c = *src;
+
+ /*
+ * A path component that begins with . could be
+ * special:
+ * (1) "." and ends -- ignore and terminate.
+ * (2) "./" -- ignore them, eat slash and continue.
+ * (3) ".." and ends -- strip one and terminate.
+ * (4) "../" -- strip one, eat slash and continue.
+ */
+ if (c == '.') {
+ switch (src[1]) {
+ case '\0':
+ /* (1) */
+ src++;
+ break;
+ case '/':
+ /* (2) */
+ src += 2;
+ while (*src == '/')
+ src++;
+ continue;
+ case '.':
+ switch (src[2]) {
+ case '\0':
+ /* (3) */
+ src += 2;
+ goto up_one;
+ case '/':
+ /* (4) */
+ src += 3;
+ while (*src == '/')
+ src++;
+ goto up_one;
+ }
+ }
}
- /* "./" */
+
+ /* copy up to the next '/', and eat all '/' */
+ while ((c = *src++) != '\0' && c != '/')
+ *dst++ = c;
if (c == '/') {
- path += 2;
- continue;
- }
- if (c != '.')
- break;
- c = path[2];
- if (!c)
- path += 2;
- else if (c == '/')
- path += 3;
- else
+ *dst++ = c;
+ while (c == '/')
+ c = *src++;
+ src--;
+ } else if (!c)
break;
- /* ".." and "../" */
- /* Remove last component of the prefix */
- do {
- if (!len)
- die("'%s' is outside repository", orig);
- len--;
- } while (len && prefix[len-1] != '/');
continue;
+
+ up_one:
+ /*
+ * dst0..dst is prefix portion, and dst[-1] is '/';
+ * go up one level.
+ */
+ dst -= 2; /* go past trailing '/' if any */
+ if (dst < dst0)
+ return -1;
+ while (1) {
+ if (dst <= dst0)
+ break;
+ c = *dst--;
+ if (c == '/') {
+ dst += 2;
+ break;
+ }
+ }
}
- if (len) {
- int speclen = strlen(path);
- char *n = xmalloc(speclen + len + 1);
+ *dst = '\0';
+ return 0;
+}
- memcpy(n, prefix, len);
- memcpy(n + len, path, speclen+1);
- path = n;
+const 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 {
+ if (len)
+ memcpy(sanitized, prefix, len);
+ strcpy(sanitized + len, path);
}
- return path;
+ if (sanitary_path_copy(sanitized, sanitized))
+ goto error_out;
+ if (is_absolute_path(orig)) {
+ const char *work_tree = get_git_work_tree();
+ size_t len = strlen(work_tree);
+ size_t total = strlen(sanitized) + 1;
+ if (strncmp(sanitized, work_tree, len) ||
+ (sanitized[len] != '\0' && sanitized[len] != '/')) {
+ error_out:
+ error("'%s' is outside repository", orig);
+ free(sanitized);
+ return NULL;
+ }
+ if (sanitized[len] == '/')
+ len++;
+ memmove(sanitized, sanitized + len, total - len);
+ }
+ return sanitized;
}
/*
const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
{
static char path[PATH_MAX];
- if (!pfx || !*pfx || arg[0] == '/')
+ if (!pfx || !*pfx || is_absolute_path(arg))
return arg;
memcpy(path, pfx, pfx_len);
strcpy(path + pfx_len, arg);
const char **get_pathspec(const char *prefix, const char **pathspec)
{
const char *entry = *pathspec;
- const char **p;
+ const char **src, **dst;
int prefixlen;
if (!prefix && !entry)
}
/* Otherwise we have to re-write the entries.. */
- p = pathspec;
+ src = pathspec;
+ dst = pathspec;
prefixlen = prefix ? strlen(prefix) : 0;
- do {
- *p = prefix_path(prefix, prefixlen, entry);
- } while ((entry = *++p) != NULL);
- return (const char **) pathspec;
+ while (*src) {
+ const char *p = prefix_path(prefix, prefixlen, *src);
+ if (p)
+ *(dst++) = p;
+ else
+ exit(128); /* error message already given */
+ src++;
+ }
+ *dst = NULL;
+ if (!*pathspec)
+ return NULL;
+ return pathspec;
}
/*
* Test if it looks like we're at a git directory.
* We want to see:
*
- * - either a objects/ directory _or_ the proper
+ * - either an objects/ directory _or_ the proper
* GIT_OBJECT_DIRECTORY environment variable
* - a refs/ directory
* - either a HEAD symlink or a HEAD file that is formatted as
return NULL;
}
+void setup_work_tree(void)
+{
+ const char *work_tree, *git_dir;
+ static int initialized = 0;
+
+ if (initialized)
+ return;
+ work_tree = get_git_work_tree();
+ git_dir = get_git_dir();
+ if (!is_absolute_path(git_dir))
+ set_git_dir(make_absolute_path(git_dir));
+ if (!work_tree || chdir(work_tree))
+ die("This operation must be run in a work tree");
+ initialized = 1;
+}
+
+static int check_repository_format_gently(int *nongit_ok)
+{
+ git_config(check_repository_format_version);
+ 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;
+ return -1;
+ }
+ return 0;
+}
+
/*
* 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 *gitdirenv;
int len, 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
if (!work_tree_env) {
retval = set_work_tree(gitdirenv);
- /* config may override worktree
- * see set_work_tree comment */
- check_repository_format();
+ /* config may override worktree */
+ if (check_repository_format_gently(nongit_ok))
+ return NULL;
return retval;
}
- check_repository_format();
+ if (check_repository_format_gently(nongit_ok))
+ return NULL;
retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
get_git_work_tree());
if (!retval || !*retval)
if (chdir(work_tree_env) < 0)
die ("Could not chdir to %s", work_tree_env);
strcat(buffer, "/");
- inside_work_tree = 1;
return retval;
}
if (nongit_ok) {
if (!work_tree_env)
inside_work_tree = 0;
setenv(GIT_DIR_ENVIRONMENT, ".", 1);
- check_repository_format();
+ check_repository_format_gently(nongit_ok);
return NULL;
}
chdir("..");
if (!work_tree_env)
inside_work_tree = 1;
git_work_tree_cfg = xstrndup(cwd, offset);
- check_repository_format();
+ if (check_repository_format_gently(nongit_ok))
+ return NULL;
if (offset == len)
return NULL;
if (is_bare_repository_cfg == 1)
inside_work_tree = -1;
} else if (strcmp(var, "core.worktree") == 0) {
- if (git_work_tree_cfg)
- free(git_work_tree_cfg);
+ if (!value)
+ return config_error_nonbool(var);
+ free(git_work_tree_cfg);
git_work_tree_cfg = xstrdup(value);
inside_work_tree = -1;
}
int check_repository_format(void)
{
- git_config(check_repository_format_version);
- if (GIT_REPO_VERSION < repository_format_version)
- die ("Expected git repo version <= %d, found %d",
- GIT_REPO_VERSION, repository_format_version);
- return 0;
+ return check_repository_format_gently(NULL);
}
const char *setup_git_directory(void)