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index 346ef2eb2d678b742280c0816a09b8ca174ca799..61c22e6becc1e49f1e92c916a4b8badd30a9cb2f 100644 (file)
--- a/setup.c
+++ b/setup.c
static int inside_git_dir = -1;
static int inside_work_tree = -1;
-const char *prefix_path(const char *prefix, int len, const char *path)
+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 {
+ char *sanitized;
+ if (is_absolute_path(orig)) {
+ const char *temp = real_path(path);
+ sanitized = xmalloc(len + strlen(temp) + 1);
+ strcpy(sanitized, temp);
+ } else {
+ sanitized = xmalloc(len + strlen(path) + 1);
if (len)
memcpy(sanitized, prefix, len);
strcpy(sanitized + len, path);
return sanitized;
}
-/*
- * Unlike prefix_path, this should be used if the named file does
- * not have to interact with index entry; i.e. name of a random file
- * on the filesystem.
- */
-const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
-{
- static char path[PATH_MAX];
-#ifndef WIN32
- if (!pfx_len || is_absolute_path(arg))
- return arg;
- memcpy(path, pfx, pfx_len);
- strcpy(path + pfx_len, arg);
-#else
- char *p;
- /* don't add prefix to absolute paths, but still replace '\' by '/' */
- if (is_absolute_path(arg))
- pfx_len = 0;
- else if (pfx_len)
- memcpy(path, pfx, pfx_len);
- strcpy(path + pfx_len, arg);
- for (p = path + pfx_len; *p; p++)
- if (*p == '\\')
- *p = '/';
-#endif
- return path;
-}
-
int check_filename(const char *prefix, const char *arg)
{
const char *name;
{
unsigned char sha1[20];
unsigned mode;
- /* try a detailed diagnostic ... */
- get_sha1_with_mode_1(arg, sha1, &mode, 0, prefix);
+
+ /*
+ * Saying "'(icase)foo' does not exist in the index" when the
+ * user gave us ":(icase)foo" is just stupid. A magic pathspec
+ * begins with a colon and is followed by a non-alnum; do not
+ * let get_sha1_with_mode_1(only_to_die=1) to even trigger.
+ */
+ if (!(arg[0] == ':' && !isalnum(arg[1])))
+ /* try a detailed diagnostic ... */
+ get_sha1_with_mode_1(arg, sha1, &mode, 1, 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", arg);
"Use '--' to separate filenames from revisions", arg);
}
+/*
+ * Magic pathspec
+ *
+ * NEEDSWORK: These need to be moved to dir.h or even to a new
+ * pathspec.h when we restructure get_pathspec() users to use the
+ * "struct pathspec" interface.
+ *
+ * Possible future magic semantics include stuff like:
+ *
+ * { PATHSPEC_NOGLOB, '!', "noglob" },
+ * { PATHSPEC_ICASE, '\0', "icase" },
+ * { PATHSPEC_RECURSIVE, '*', "recursive" },
+ * { PATHSPEC_REGEXP, '\0', "regexp" },
+ *
+ */
+#define PATHSPEC_FROMTOP (1<<0)
+
+static struct pathspec_magic {
+ unsigned bit;
+ char mnemonic; /* this cannot be ':'! */
+ const char *name;
+} pathspec_magic[] = {
+ { PATHSPEC_FROMTOP, '/', "top" },
+};
+
+/*
+ * Take an element of a pathspec and check for magic signatures.
+ * Append the result to the prefix.
+ *
+ * For now, we only parse the syntax and throw out anything other than
+ * "top" magic.
+ *
+ * NEEDSWORK: This needs to be rewritten when we start migrating
+ * get_pathspec() users to use the "struct pathspec" interface. For
+ * example, a pathspec element may be marked as case-insensitive, but
+ * the prefix part must always match literally, and a single stupid
+ * string cannot express such a case.
+ */
+static const char *prefix_pathspec(const char *prefix, int prefixlen, const char *elt)
+{
+ unsigned magic = 0;
+ const char *copyfrom = elt;
+ int i;
+
+ if (elt[0] != ':') {
+ ; /* nothing to do */
+ } else if (elt[1] == '(') {
+ /* longhand */
+ const char *nextat;
+ for (copyfrom = elt + 2;
+ *copyfrom && *copyfrom != ')';
+ copyfrom = nextat) {
+ size_t len = strcspn(copyfrom, ",)");
+ if (copyfrom[len] == ')')
+ nextat = copyfrom + len;
+ else
+ nextat = copyfrom + len + 1;
+ if (!len)
+ continue;
+ for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
+ if (strlen(pathspec_magic[i].name) == len &&
+ !strncmp(pathspec_magic[i].name, copyfrom, len)) {
+ magic |= pathspec_magic[i].bit;
+ break;
+ }
+ if (ARRAY_SIZE(pathspec_magic) <= i)
+ die("Invalid pathspec magic '%.*s' in '%s'",
+ (int) len, copyfrom, elt);
+ }
+ if (*copyfrom == ')')
+ copyfrom++;
+ } else {
+ /* shorthand */
+ for (copyfrom = elt + 1;
+ *copyfrom && *copyfrom != ':';
+ copyfrom++) {
+ char ch = *copyfrom;
+
+ if (!is_pathspec_magic(ch))
+ break;
+ for (i = 0; i < ARRAY_SIZE(pathspec_magic); i++)
+ if (pathspec_magic[i].mnemonic == ch) {
+ magic |= pathspec_magic[i].bit;
+ break;
+ }
+ if (ARRAY_SIZE(pathspec_magic) <= i)
+ die("Unimplemented pathspec magic '%c' in '%s'",
+ ch, elt);
+ }
+ if (*copyfrom == ':')
+ copyfrom++;
+ }
+
+ if (magic & PATHSPEC_FROMTOP)
+ return xstrdup(copyfrom);
+ else
+ return prefix_path(prefix, prefixlen, copyfrom);
+}
+
const char **get_pathspec(const char *prefix, const char **pathspec)
{
const char *entry = *pathspec;
dst = pathspec;
prefixlen = prefix ? strlen(prefix) : 0;
while (*src) {
- const char *p = prefix_path(prefix, prefixlen, *src);
- *(dst++) = p;
+ *(dst++) = prefix_pathspec(prefix, prefixlen, *src);
src++;
}
*dst = NULL;
return inside_work_tree;
}
-/*
- * set_work_tree() is only ever called if you set GIT_DIR explicitly.
- * The old behaviour (which we retain here) is to set the work tree root
- * to the cwd, unless overridden by the config, the command line, or
- * GIT_WORK_TREE.
- */
-static const char *set_work_tree(const char *dir)
-{
- char buffer[PATH_MAX + 1];
-
- if (!getcwd(buffer, sizeof(buffer)))
- die ("Could not get the current working directory");
- git_work_tree_cfg = xstrdup(buffer);
- inside_work_tree = 1;
-
- return NULL;
-}
-
void setup_work_tree(void)
{
const char *work_tree, *git_dir;
work_tree = get_git_work_tree();
git_dir = get_git_dir();
if (!is_absolute_path(git_dir))
- git_dir = make_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");
- set_git_dir(make_relative_path(git_dir, work_tree));
+
+ /*
+ * Make sure subsequent git processes find correct worktree
+ * if $GIT_WORK_TREE is set relative
+ */
+ if (getenv(GIT_WORK_TREE_ENVIRONMENT))
+ setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
+
+ set_git_dir(relative_path(git_dir, work_tree));
initialized = 1;
}
-static int check_repository_format_gently(int *nongit_ok)
+static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
{
- git_config(check_repository_format_version, NULL);
+ char repo_config[PATH_MAX+1];
+
+ /*
+ * git_config() can't be used here because it calls git_pathdup()
+ * to get $GIT_CONFIG/config. That call will make setup_git_env()
+ * set git_dir to ".git".
+ *
+ * We are in gitdir setup, no git dir has been found useable yet.
+ * Use a gentler version of git_config() to check if this repo
+ * is a good one.
+ */
+ snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
+ git_config_early(check_repository_format_version, NULL, repo_config);
if (GIT_REPO_VERSION < repository_format_version) {
if (!nongit_ok)
die ("Expected git repo version <= %d, found %d",
* Try to read the location of the git directory from the .git file,
* return path to git directory if found.
*/
-const char *read_gitfile_gently(const char *path)
+const char *read_gitfile(const char *path)
{
char *buf;
char *dir;
const char *slash;
struct stat st;
int fd;
- size_t len;
+ ssize_t len;
if (stat(path, &st))
return NULL;
if (!is_git_directory(dir))
die("Not a git repository: %s", dir);
- path = make_absolute_path(dir);
+ path = real_path(dir);
free(buf);
return path;
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
- const char *work_tree_env, int *nongit_ok)
+ char *cwd, int len,
+ int *nongit_ok)
{
- static char buffer[1024 + 1];
- const char *retval;
+ const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
+ const char *worktree;
+ char *gitfile;
+ int offset;
if (PATH_MAX - 40 < strlen(gitdirenv))
die("'$%s' too big", GIT_DIR_ENVIRONMENT);
+
+ gitfile = (char*)read_gitfile(gitdirenv);
+ if (gitfile) {
+ gitfile = xstrdup(gitfile);
+ gitdirenv = gitfile;
+ }
+
if (!is_git_directory(gitdirenv)) {
if (nongit_ok) {
*nongit_ok = 1;
+ free(gitfile);
return NULL;
}
die("Not a git repository: '%s'", gitdirenv);
}
- if (!work_tree_env) {
- retval = set_work_tree(gitdirenv);
- /* config may override worktree */
- if (check_repository_format_gently(nongit_ok))
- return NULL;
- return retval;
+
+ if (check_repository_format_gently(gitdirenv, nongit_ok)) {
+ free(gitfile);
+ return NULL;
}
- if (check_repository_format_gently(nongit_ok))
+
+ /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
+ if (work_tree_env)
+ set_git_work_tree(work_tree_env);
+ else if (is_bare_repository_cfg > 0) {
+ if (git_work_tree_cfg) /* #22.2, #30 */
+ die("core.bare and core.worktree do not make sense");
+
+ /* #18, #26 */
+ set_git_dir(gitdirenv);
+ free(gitfile);
return NULL;
- retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
- get_git_work_tree());
- if (!retval || !*retval)
+ }
+ else if (git_work_tree_cfg) { /* #6, #14 */
+ if (is_absolute_path(git_work_tree_cfg))
+ set_git_work_tree(git_work_tree_cfg);
+ else {
+ char core_worktree[PATH_MAX];
+ if (chdir(gitdirenv))
+ die_errno("Could not chdir to '%s'", gitdirenv);
+ if (chdir(git_work_tree_cfg))
+ die_errno("Could not chdir to '%s'", git_work_tree_cfg);
+ if (!getcwd(core_worktree, PATH_MAX))
+ die_errno("Could not get directory '%s'", git_work_tree_cfg);
+ if (chdir(cwd))
+ die_errno("Could not come back to cwd");
+ set_git_work_tree(core_worktree);
+ }
+ }
+ else /* #2, #10 */
+ set_git_work_tree(".");
+
+ /* set_git_work_tree() must have been called by now */
+ worktree = get_git_work_tree();
+
+ /* both get_git_work_tree() and cwd are already normalized */
+ if (!strcmp(cwd, worktree)) { /* cwd == worktree */
+ set_git_dir(gitdirenv);
+ free(gitfile);
return NULL;
- set_git_dir(make_absolute_path(gitdirenv));
- if (chdir(work_tree_env) < 0)
- die_errno ("Could not chdir to '%s'", work_tree_env);
- strcat(buffer, "/");
- return retval;
-}
+ }
-static int cwd_contains_git_dir(const char **gitfile_dirp)
-{
- const char *gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
- *gitfile_dirp = gitfile_dir;
- if (gitfile_dir) {
- if (set_git_dir(gitfile_dir))
- die("Repository setup failed");
- return 1;
+ offset = dir_inside_of(cwd, worktree);
+ if (offset >= 0) { /* cwd inside worktree? */
+ set_git_dir(real_path(gitdirenv));
+ if (chdir(worktree))
+ die_errno("Could not chdir to '%s'", worktree);
+ cwd[len++] = '/';
+ cwd[len] = '\0';
+ free(gitfile);
+ return cwd + offset;
}
- return is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT);
+
+ /* cwd outside worktree */
+ set_git_dir(gitdirenv);
+ free(gitfile);
+ return NULL;
}
-static const char *setup_discovered_git_dir(const char *work_tree_env,
- int offset, int len, char *cwd, int *nongit_ok)
+static const char *setup_discovered_git_dir(const char *gitdir,
+ char *cwd, int offset, int len,
+ int *nongit_ok)
{
- int root_len;
+ if (check_repository_format_gently(gitdir, nongit_ok))
+ return NULL;
- inside_git_dir = 0;
- if (!work_tree_env)
- inside_work_tree = 1;
- root_len = offset_1st_component(cwd);
- git_work_tree_cfg = xstrndup(cwd, offset > root_len ? offset : root_len);
- if (check_repository_format_gently(nongit_ok))
+ /* --work-tree is set without --git-dir; use discovered one */
+ if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
+ if (offset != len && !is_absolute_path(gitdir))
+ gitdir = xstrdup(real_path(gitdir));
+ if (chdir(cwd))
+ die_errno("Could not come back to cwd");
+ return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+ }
+
+ /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
+ if (is_bare_repository_cfg > 0) {
+ set_git_dir(offset == len ? gitdir : real_path(gitdir));
+ if (chdir(cwd))
+ die_errno("Could not come back to cwd");
return NULL;
+ }
+
+ /* #0, #1, #5, #8, #9, #12, #13 */
+ set_git_work_tree(".");
+ if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
+ set_git_dir(gitdir);
+ inside_git_dir = 0;
+ inside_work_tree = 1;
if (offset == len)
return NULL;
return cwd + offset;
}
-static const char *setup_bare_git_dir(const char *work_tree_env,
- int offset, int len, char *cwd, int *nongit_ok)
+/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
+static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
{
int root_len;
+ if (check_repository_format_gently(".", nongit_ok))
+ return NULL;
+
+ /* --work-tree is set without --git-dir; use discovered one */
+ if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
+ const char *gitdir;
+
+ gitdir = offset == len ? "." : xmemdupz(cwd, offset);
+ if (chdir(cwd))
+ die_errno("Could not come back to cwd");
+ return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+ }
+
inside_git_dir = 1;
- if (!work_tree_env)
- inside_work_tree = 0;
+ inside_work_tree = 0;
if (offset != len) {
if (chdir(cwd))
die_errno("Cannot come back to cwd");
root_len = offset_1st_component(cwd);
cwd[offset > root_len ? offset : root_len] = '\0';
set_git_dir(cwd);
- } else
+ }
+ else
set_git_dir(".");
- check_repository_format_gently(nongit_ok);
return NULL;
}
*/
static const char *setup_git_directory_gently_1(int *nongit_ok)
{
- const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
static char cwd[PATH_MAX+1];
- const char *gitdirenv;
- const char *gitfile_dir;
+ const char *gitdirenv, *ret;
+ char *gitfile;
int len, offset, ceil_offset;
dev_t current_device = 0;
int one_filesystem = 1;
if (nongit_ok)
*nongit_ok = 0;
+ if (!getcwd(cwd, sizeof(cwd)-1))
+ die_errno("Unable to read current working directory");
+ offset = len = strlen(cwd);
+
/*
* If GIT_DIR is set explicitly, we're not going
* to do any discovery, but we still do repository
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv)
- return setup_explicit_git_dir(gitdirenv, work_tree_env, nongit_ok);
-
- if (!getcwd(cwd, sizeof(cwd)-1))
- die_errno("Unable to read current working directory");
+ return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
* - ../../.git/
* etc.
*/
- offset = len = strlen(cwd);
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
if (one_filesystem)
current_device = get_device_or_die(".", NULL);
for (;;) {
- if (cwd_contains_git_dir(&gitfile_dir))
- return setup_discovered_git_dir(work_tree_env, offset,
- len, cwd, nongit_ok);
+ 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;
+ }
+
+ if (gitdirenv) {
+ ret = setup_discovered_git_dir(gitdirenv,
+ cwd, offset, len,
+ nongit_ok);
+ free(gitfile);
+ return ret;
+ }
+ free(gitfile);
+
if (is_git_directory("."))
- return setup_bare_git_dir(work_tree_env, offset,
- len, cwd, nongit_ok);
+ return setup_bare_git_dir(cwd, offset, len, nongit_ok);
+
while (--offset > ceil_offset && cwd[offset] != '/');
if (offset <= ceil_offset)
return setup_nongit(cwd, nongit_ok);
const char *prefix;
prefix = setup_git_directory_gently_1(nongit_ok);
- if (startup_info)
+ if (prefix)
+ setenv("GIT_PREFIX", prefix, 1);
+ else
+ setenv("GIT_PREFIX", "", 1);
+
+ if (startup_info) {
startup_info->have_repository = !nongit_ok || !*nongit_ok;
+ startup_info->prefix = prefix;
+ }
return prefix;
}
@@ -590,7 +767,7 @@ int check_repository_format_version(const char *var, const char *value, void *cb
int check_repository_format(void)
{
- return check_repository_format_gently(NULL);
+ return check_repository_format_gently(get_git_dir(), NULL);
}
/*
*/
const char *setup_git_directory(void)
{
- const char *retval = setup_git_directory_gently(NULL);
-
- /* If the work tree is not the default one, recompute prefix */
- if (inside_work_tree < 0) {
- static char buffer[PATH_MAX + 1];
- char *rel;
- if (retval && chdir(retval))
- die_errno ("Could not jump back into original cwd");
- rel = get_relative_cwd(buffer, PATH_MAX, get_git_work_tree());
- if (rel && *rel && chdir(get_git_work_tree()))
- die_errno ("Could not jump to working directory");
- return rel && *rel ? strcat(rel, "/") : NULL;
- }
+ return setup_git_directory_gently(NULL);
+}
- return retval;
+const char *resolve_gitdir(const char *suspect)
+{
+ if (is_git_directory(suspect))
+ return suspect;
+ return read_gitfile(suspect);
}