4 static int inside_git_dir = -1;
5 static int inside_work_tree = -1;
7 const char *prefix_path(const char *prefix, int len, const char *path)
9 const char *orig = path;
35 /* Remove last component of the prefix */
38 die("'%s' is outside repository", orig);
40 } while (len && prefix[len-1] != '/');
44 int speclen = strlen(path);
45 char *n = xmalloc(speclen + len + 1);
47 memcpy(n, prefix, len);
48 memcpy(n + len, path, speclen+1);
55 * Unlike prefix_path, this should be used if the named file does
56 * not have to interact with index entry; i.e. name of a random file
59 const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
61 static char path[PATH_MAX];
62 if (!pfx || !*pfx || arg[0] == '/')
64 memcpy(path, pfx, pfx_len);
65 strcpy(path + pfx_len, arg);
70 * Verify a filename that we got as an argument for a pathspec
71 * entry. Note that a filename that begins with "-" never verifies
72 * as true, because even if such a filename were to exist, we want
73 * it to be preceded by the "--" marker (or we want the user to
74 * use a format like "./-filename")
76 void verify_filename(const char *prefix, const char *arg)
82 die("bad flag '%s' used after filename", arg);
83 name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
84 if (!lstat(name, &st))
87 die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
88 "Use '--' to separate paths from revisions", arg);
89 die("'%s': %s", arg, strerror(errno));
93 * Opposite of the above: the command line did not have -- marker
94 * and we parsed the arg as a refname. It should not be interpretable
97 void verify_non_filename(const char *prefix, const char *arg)
102 if (!is_inside_work_tree() || is_inside_git_dir())
106 name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
107 if (!lstat(name, &st))
108 die("ambiguous argument '%s': both revision and filename\n"
109 "Use '--' to separate filenames from revisions", arg);
110 if (errno != ENOENT && errno != ENOTDIR)
111 die("'%s': %s", arg, strerror(errno));
114 const char **get_pathspec(const char *prefix, const char **pathspec)
116 const char *entry = *pathspec;
120 if (!prefix && !entry)
124 static const char *spec[2];
130 /* Otherwise we have to re-write the entries.. */
132 prefixlen = prefix ? strlen(prefix) : 0;
134 *p = prefix_path(prefix, prefixlen, entry);
135 } while ((entry = *++p) != NULL);
136 return (const char **) pathspec;
140 * Test if it looks like we're at a git directory.
143 * - either a objects/ directory _or_ the proper
144 * GIT_OBJECT_DIRECTORY environment variable
145 * - a refs/ directory
146 * - either a HEAD symlink or a HEAD file that is formatted as
147 * a proper "ref:", or a regular file HEAD that has a properly
148 * formatted sha1 object name.
150 static int is_git_directory(const char *suspect)
153 size_t len = strlen(suspect);
155 strcpy(path, suspect);
156 if (getenv(DB_ENVIRONMENT)) {
157 if (access(getenv(DB_ENVIRONMENT), X_OK))
161 strcpy(path + len, "/objects");
162 if (access(path, X_OK))
166 strcpy(path + len, "/refs");
167 if (access(path, X_OK))
170 strcpy(path + len, "/HEAD");
171 if (validate_headref(path))
177 int is_inside_git_dir(void)
179 if (inside_git_dir < 0)
180 inside_git_dir = is_inside_dir(get_git_dir());
181 return inside_git_dir;
184 int is_inside_work_tree(void)
186 if (inside_work_tree < 0)
187 inside_work_tree = is_inside_dir(get_git_work_tree());
188 return inside_work_tree;
192 * set_work_tree() is only ever called if you set GIT_DIR explicitely.
193 * The old behaviour (which we retain here) is to set the work tree root
194 * to the cwd, unless overridden by the config, the command line, or
197 static const char *set_work_tree(const char *dir)
199 char buffer[PATH_MAX + 1];
201 if (!getcwd(buffer, sizeof(buffer)))
202 die ("Could not get the current working directory");
203 git_work_tree_cfg = xstrdup(buffer);
204 inside_work_tree = 1;
209 void setup_work_tree(void)
211 const char *work_tree = get_git_work_tree();
212 const char *git_dir = get_git_dir();
213 if (!is_absolute_path(git_dir))
214 set_git_dir(make_absolute_path(git_dir));
215 if (!work_tree || chdir(work_tree))
216 die("This operation must be run in a work tree");
220 * We cannot decide in this function whether we are in the work tree or
221 * not, since the config can only be read _after_ this function was called.
223 const char *setup_git_directory_gently(int *nongit_ok)
225 const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
226 static char cwd[PATH_MAX+1];
227 const char *gitdirenv;
231 * If GIT_DIR is set explicitly, we're not going
232 * to do any discovery, but we still do repository
235 gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
237 if (PATH_MAX - 40 < strlen(gitdirenv))
238 die("'$%s' too big", GIT_DIR_ENVIRONMENT);
239 if (is_git_directory(gitdirenv)) {
240 static char buffer[1024 + 1];
244 return set_work_tree(gitdirenv);
245 retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
246 get_git_work_tree());
247 if (!retval || !*retval)
249 set_git_dir(make_absolute_path(gitdirenv));
250 if (chdir(work_tree_env) < 0)
251 die ("Could not chdir to %s", work_tree_env);
259 die("Not a git repository: '%s'", gitdirenv);
262 if (!getcwd(cwd, sizeof(cwd)-1))
263 die("Unable to read current working directory");
266 * Test in the following order (relative to the cwd):
274 offset = len = strlen(cwd);
276 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
278 if (is_git_directory(".")) {
281 inside_work_tree = 0;
282 setenv(GIT_DIR_ENVIRONMENT, ".", 1);
290 die("Cannot come back to cwd");
294 die("Not a git repository");
296 } while (cwd[--offset] != '/');
301 inside_work_tree = 1;
302 git_work_tree_cfg = xstrndup(cwd, offset);
306 /* Make "offset" point to past the '/', and add a '/' at the end */
313 int git_config_perm(const char *var, const char *value)
317 if (!strcmp(value, "umask"))
319 if (!strcmp(value, "group"))
321 if (!strcmp(value, "all") ||
322 !strcmp(value, "world") ||
323 !strcmp(value, "everybody"))
324 return PERM_EVERYBODY;
329 return git_config_bool(var, value);
332 int check_repository_format_version(const char *var, const char *value)
334 if (strcmp(var, "core.repositoryformatversion") == 0)
335 repository_format_version = git_config_int(var, value);
336 else if (strcmp(var, "core.sharedrepository") == 0)
337 shared_repository = git_config_perm(var, value);
338 else if (strcmp(var, "core.bare") == 0) {
339 is_bare_repository_cfg = git_config_bool(var, value);
340 if (is_bare_repository_cfg == 1)
341 inside_work_tree = -1;
342 } else if (strcmp(var, "core.worktree") == 0) {
343 if (git_work_tree_cfg)
344 free(git_work_tree_cfg);
345 git_work_tree_cfg = xstrdup(value);
346 inside_work_tree = -1;
351 int check_repository_format(void)
353 git_config(check_repository_format_version);
354 if (GIT_REPO_VERSION < repository_format_version)
355 die ("Expected git repo version <= %d, found %d",
356 GIT_REPO_VERSION, repository_format_version);
360 const char *setup_git_directory(void)
362 const char *retval = setup_git_directory_gently(NULL);
363 check_repository_format();
365 /* If the work tree is not the default one, recompute prefix */
366 if (inside_work_tree < 0) {
367 static char buffer[PATH_MAX + 1];
369 if (retval && chdir(retval))
370 die ("Could not jump back into original cwd");
371 rel = get_relative_cwd(buffer, PATH_MAX, get_git_work_tree());
372 return rel && *rel ? strcat(rel, "/") : NULL;