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;
210 * We cannot decide in this function whether we are in the work tree or
211 * not, since the config can only be read _after_ this function was called.
213 const char *setup_git_directory_gently(int *nongit_ok
)
215 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
216 static char cwd
[PATH_MAX
+1];
217 const char *gitdirenv
;
221 * If GIT_DIR is set explicitly, we're not going
222 * to do any discovery, but we still do repository
225 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
227 if (PATH_MAX
- 40 < strlen(gitdirenv
))
228 die("'$%s' too big", GIT_DIR_ENVIRONMENT
);
229 if (is_git_directory(gitdirenv
)) {
230 static char buffer
[1024 + 1];
234 return set_work_tree(gitdirenv
);
235 retval
= get_relative_cwd(buffer
, sizeof(buffer
) - 1,
236 get_git_work_tree());
237 if (!retval
|| !*retval
)
239 set_git_dir(make_absolute_path(gitdirenv
));
240 if (chdir(work_tree_env
) < 0)
241 die ("Could not chdir to %s", work_tree_env
);
243 inside_work_tree
= 1;
250 die("Not a git repository: '%s'", gitdirenv
);
253 if (!getcwd(cwd
, sizeof(cwd
)-1))
254 die("Unable to read current working directory");
257 * Test in the following order (relative to the cwd):
265 offset
= len
= strlen(cwd
);
267 if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT
))
269 if (is_git_directory(".")) {
272 inside_work_tree
= 0;
273 setenv(GIT_DIR_ENVIRONMENT
, ".", 1);
281 die("Cannot come back to cwd");
285 die("Not a git repository");
287 } while (cwd
[--offset
] != '/');
292 inside_work_tree
= 1;
293 git_work_tree_cfg
= xstrndup(cwd
, offset
);
297 /* Make "offset" point to past the '/', and add a '/' at the end */
304 int git_config_perm(const char *var
, const char *value
)
308 if (!strcmp(value
, "umask"))
310 if (!strcmp(value
, "group"))
312 if (!strcmp(value
, "all") ||
313 !strcmp(value
, "world") ||
314 !strcmp(value
, "everybody"))
315 return PERM_EVERYBODY
;
320 return git_config_bool(var
, value
);
323 int check_repository_format_version(const char *var
, const char *value
)
325 if (strcmp(var
, "core.repositoryformatversion") == 0)
326 repository_format_version
= git_config_int(var
, value
);
327 else if (strcmp(var
, "core.sharedrepository") == 0)
328 shared_repository
= git_config_perm(var
, value
);
329 else if (strcmp(var
, "core.bare") == 0) {
330 is_bare_repository_cfg
= git_config_bool(var
, value
);
331 if (is_bare_repository_cfg
== 1)
332 inside_work_tree
= -1;
333 } else if (strcmp(var
, "core.worktree") == 0) {
334 if (git_work_tree_cfg
)
335 free(git_work_tree_cfg
);
336 git_work_tree_cfg
= xstrdup(value
);
337 inside_work_tree
= -1;
342 int check_repository_format(void)
344 git_config(check_repository_format_version
);
345 if (GIT_REPO_VERSION
< repository_format_version
)
346 die ("Expected git repo version <= %d, found %d",
347 GIT_REPO_VERSION
, repository_format_version
);
351 const char *setup_git_directory(void)
353 const char *retval
= setup_git_directory_gently(NULL
);
354 check_repository_format();
356 /* If the work tree is not the default one, recompute prefix */
357 if (inside_work_tree
< 0) {
358 static char buffer
[PATH_MAX
+ 1];
360 if (retval
&& chdir(retval
))
361 die ("Could not jump back into original cwd");
362 rel
= get_relative_cwd(buffer
, PATH_MAX
, get_git_work_tree());
363 return rel
&& *rel
? strcat(rel
, "/") : NULL
;