diff options
Diffstat (limited to 'setup.c')
| -rw-r--r-- | setup.c | 263 |
1 files changed, 169 insertions, 94 deletions
@@ -4,7 +4,7 @@ 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); @@ -208,24 +208,6 @@ int is_inside_work_tree(void) 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; @@ -239,13 +221,33 @@ void setup_work_tree(void) git_dir = make_absolute_path(git_dir); if (!work_tree || chdir(work_tree)) die("This operation must be run in a 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(make_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 $GIT_CONFIG/config. That call will make setup_git_env() + * set git_dir to ".git". + * + * We are in gitdir setup, no git dir has been found useable yet. + * Use a gentler version of git_config() to check if this repo + * is a good one. + */ + snprintf(repo_config, PATH_MAX, "%s/config", gitdir); + git_config_early(check_repository_format_version, NULL, repo_config); if (GIT_REPO_VERSION < repository_format_version) { if (!nongit_ok) die ("Expected git repo version <= %d, found %d", @@ -314,64 +316,124 @@ const char *read_gitfile_gently(const char *path) } static const char *setup_explicit_git_dir(const char *gitdirenv, - const char *work_tree_env, int *nongit_ok) + char *cwd, int len, + int *nongit_ok) { - static char buffer[1024 + 1]; - const char *retval; + const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT); + const char *worktree; + char *gitfile; if (PATH_MAX - 40 < strlen(gitdirenv)) die("'$%s' too big", GIT_DIR_ENVIRONMENT); + + gitfile = (char*)read_gitfile_gently(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; + if (!prefixcmp(cwd, worktree) && + cwd[strlen(worktree)] == '/') { /* cwd inside worktree */ + set_git_dir(make_absolute_path(gitdirenv)); + if (chdir(worktree)) + die_errno("Could not chdir to '%s'", worktree); + cwd[len++] = '/'; + cwd[len] = '\0'; + free(gitfile); + return cwd + strlen(worktree) + 1; } - 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(make_absolute_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 : make_absolute_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; @@ -382,23 +444,35 @@ static const char *setup_discovered_git_dir(const char *work_tree_env, 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; } @@ -428,11 +502,10 @@ static dev_t get_device_or_die(const char *path, const char *prefix) */ 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; @@ -445,6 +518,10 @@ static const char *setup_git_directory_gently_1(int *nongit_ok) 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 @@ -452,10 +529,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok) */ 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)) @@ -472,17 +546,30 @@ static const char *setup_git_directory_gently_1(int *nongit_ok) * - ../../.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_gently(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); @@ -512,8 +599,10 @@ const char *setup_git_directory_gently(int *nongit_ok) const char *prefix; prefix = setup_git_directory_gently_1(nongit_ok); - if (startup_info) + if (startup_info) { startup_info->have_repository = !nongit_ok || !*nongit_ok; + startup_info->prefix = prefix; + } return prefix; } @@ -590,7 +679,7 @@ 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); } /* @@ -601,19 +690,5 @@ int check_repository_format(void) */ 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 retval; + return setup_git_directory_gently(NULL); } |