diff options
Diffstat (limited to 'submodule.c')
| -rw-r--r-- | submodule.c | 267 |
1 files changed, 223 insertions, 44 deletions
diff --git a/submodule.c b/submodule.c index ece17315d6..0a2831d846 100644 --- a/submodule.c +++ b/submodule.c @@ -14,6 +14,7 @@ #include "blob.h" #include "thread-utils.h" #include "quote.h" +#include "worktree.h" static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND; static int parallel_jobs = 1; @@ -198,6 +199,56 @@ void gitmodules_config(void) } } +void gitmodules_config_sha1(const unsigned char *commit_sha1) +{ + struct strbuf rev = STRBUF_INIT; + unsigned char sha1[20]; + + if (gitmodule_sha1_from_commit(commit_sha1, sha1, &rev)) { + git_config_from_blob_sha1(submodule_config, rev.buf, + sha1, NULL); + } + strbuf_release(&rev); +} + +/* + * Determine if a submodule has been initialized at a given 'path' + */ +int is_submodule_initialized(const char *path) +{ + int ret = 0; + const struct submodule *module = NULL; + + module = submodule_from_path(null_sha1, path); + + if (module) { + char *key = xstrfmt("submodule.%s.url", module->name); + char *value = NULL; + + ret = !git_config_get_string(key, &value); + + free(value); + free(key); + } + + return ret; +} + +/* + * Determine if a submodule has been populated at a given 'path' + */ +int is_submodule_populated(const char *path) +{ + int ret = 0; + char *gitdir = xstrfmt("%s/.git", path); + + if (resolve_gitdir(gitdir)) + ret = 1; + + free(gitdir); + return ret; +} + int parse_submodule_update_strategy(const char *value, struct submodule_update_strategy *dst) { @@ -1092,45 +1143,64 @@ int submodule_uses_gitfile(const char *path) return 1; } -int ok_to_remove_submodule(const char *path) +/* + * Check if it is a bad idea to remove a submodule, i.e. if we'd lose data + * when doing so. + * + * Return 1 if we'd lose data, return 0 if the removal is fine, + * and negative values for errors. + */ +int bad_to_remove_submodule(const char *path, unsigned flags) { ssize_t len; struct child_process cp = CHILD_PROCESS_INIT; - const char *argv[] = { - "status", - "--porcelain", - "-u", - "--ignore-submodules=none", - NULL, - }; struct strbuf buf = STRBUF_INIT; - int ok_to_remove = 1; + int ret = 0; if (!file_exists(path) || is_empty_dir(path)) - return 1; + return 0; if (!submodule_uses_gitfile(path)) - return 0; + return 1; + + argv_array_pushl(&cp.args, "status", "--porcelain", + "--ignore-submodules=none", NULL); + + if (flags & SUBMODULE_REMOVAL_IGNORE_UNTRACKED) + argv_array_push(&cp.args, "-uno"); + else + argv_array_push(&cp.args, "-uall"); + + if (!(flags & SUBMODULE_REMOVAL_IGNORE_IGNORED_UNTRACKED)) + argv_array_push(&cp.args, "--ignored"); - cp.argv = argv; prepare_submodule_repo_env(&cp.env_array); cp.git_cmd = 1; cp.no_stdin = 1; cp.out = -1; cp.dir = path; - if (start_command(&cp)) - die("Could not run 'git status --porcelain -uall --ignore-submodules=none' in submodule %s", path); + if (start_command(&cp)) { + if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR) + die(_("could not start 'git status in submodule '%s'"), + path); + ret = -1; + goto out; + } len = strbuf_read(&buf, cp.out, 1024); if (len > 2) - ok_to_remove = 0; + ret = 1; close(cp.out); - if (finish_command(&cp)) - die("'git status --porcelain -uall --ignore-submodules=none' failed in submodule %s", path); - + if (finish_command(&cp)) { + if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR) + die(_("could not run 'git status in submodule '%s'"), + path); + ret = -1; + } +out: strbuf_release(&buf); - return ok_to_remove; + return ret; } static int find_first_merges(struct object_array *result, const char *path, @@ -1296,30 +1366,6 @@ int merge_submodule(unsigned char result[20], const char *path, return 0; } -/* Update gitfile and core.worktree setting to connect work tree and git dir */ -void connect_work_tree_and_git_dir(const char *work_tree, const char *git_dir) -{ - struct strbuf file_name = STRBUF_INIT; - struct strbuf rel_path = STRBUF_INIT; - const char *real_work_tree = xstrdup(real_path(work_tree)); - - /* Update gitfile */ - strbuf_addf(&file_name, "%s/.git", work_tree); - write_file(file_name.buf, "gitdir: %s", - relative_path(git_dir, real_work_tree, &rel_path)); - - /* Update core.worktree setting */ - strbuf_reset(&file_name); - strbuf_addf(&file_name, "%s/config", git_dir); - git_config_set_in_file(file_name.buf, "core.worktree", - relative_path(real_work_tree, git_dir, - &rel_path)); - - strbuf_release(&file_name); - strbuf_release(&rel_path); - free((void *)real_work_tree); -} - int parallel_submodules(void) { return parallel_jobs; @@ -1333,5 +1379,138 @@ void prepare_submodule_repo_env(struct argv_array *out) if (strcmp(*var, CONFIG_DATA_ENVIRONMENT)) argv_array_push(out, *var); } - argv_array_push(out, "GIT_DIR=.git"); + argv_array_pushf(out, "%s=%s", GIT_DIR_ENVIRONMENT, + DEFAULT_GIT_DIR_ENVIRONMENT); +} + +/* + * Embeds a single submodules git directory into the superprojects git dir, + * non recursively. + */ +static void relocate_single_git_dir_into_superproject(const char *prefix, + const char *path) +{ + char *old_git_dir = NULL, *real_old_git_dir = NULL, *real_new_git_dir = NULL; + const char *new_git_dir; + const struct submodule *sub; + + if (submodule_uses_worktrees(path)) + die(_("relocate_gitdir for submodule '%s' with " + "more than one worktree not supported"), path); + + old_git_dir = xstrfmt("%s/.git", path); + if (read_gitfile(old_git_dir)) + /* If it is an actual gitfile, it doesn't need migration. */ + return; + + real_old_git_dir = real_pathdup(old_git_dir, 1); + + sub = submodule_from_path(null_sha1, path); + if (!sub) + die(_("could not lookup name for submodule '%s'"), path); + + new_git_dir = git_path("modules/%s", sub->name); + if (safe_create_leading_directories_const(new_git_dir) < 0) + die(_("could not create directory '%s'"), new_git_dir); + real_new_git_dir = real_pathdup(new_git_dir, 1); + + if (!prefix) + prefix = get_super_prefix(); + + fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"), + prefix ? prefix : "", path, + real_old_git_dir, real_new_git_dir); + + relocate_gitdir(path, real_old_git_dir, real_new_git_dir); + + free(old_git_dir); + free(real_old_git_dir); + free(real_new_git_dir); +} + +/* + * Migrate the git directory of the submodule given by path from + * having its git directory within the working tree to the git dir nested + * in its superprojects git dir under modules/. + */ +void absorb_git_dir_into_superproject(const char *prefix, + const char *path, + unsigned flags) +{ + int err_code; + const char *sub_git_dir; + struct strbuf gitdir = STRBUF_INIT; + strbuf_addf(&gitdir, "%s/.git", path); + sub_git_dir = resolve_gitdir_gently(gitdir.buf, &err_code); + + /* Not populated? */ + if (!sub_git_dir) { + char *real_new_git_dir; + const char *new_git_dir; + const struct submodule *sub; + + if (err_code == READ_GITFILE_ERR_STAT_FAILED) { + /* unpopulated as expected */ + strbuf_release(&gitdir); + return; + } + + if (err_code != READ_GITFILE_ERR_NOT_A_REPO) + /* We don't know what broke here. */ + read_gitfile_error_die(err_code, path, NULL); + + /* + * Maybe populated, but no git directory was found? + * This can happen if the superproject is a submodule + * itself and was just absorbed. The absorption of the + * superproject did not rewrite the git file links yet, + * fix it now. + */ + sub = submodule_from_path(null_sha1, path); + if (!sub) + die(_("could not lookup name for submodule '%s'"), path); + new_git_dir = git_path("modules/%s", sub->name); + if (safe_create_leading_directories_const(new_git_dir) < 0) + die(_("could not create directory '%s'"), new_git_dir); + real_new_git_dir = real_pathdup(new_git_dir, 1); + connect_work_tree_and_git_dir(path, real_new_git_dir); + + free(real_new_git_dir); + } else { + /* Is it already absorbed into the superprojects git dir? */ + char *real_sub_git_dir = real_pathdup(sub_git_dir, 1); + char *real_common_git_dir = real_pathdup(get_git_common_dir(), 1); + + if (!starts_with(real_sub_git_dir, real_common_git_dir)) + relocate_single_git_dir_into_superproject(prefix, path); + + free(real_sub_git_dir); + free(real_common_git_dir); + } + strbuf_release(&gitdir); + + if (flags & ABSORB_GITDIR_RECURSE_SUBMODULES) { + struct child_process cp = CHILD_PROCESS_INIT; + struct strbuf sb = STRBUF_INIT; + + if (flags & ~ABSORB_GITDIR_RECURSE_SUBMODULES) + die("BUG: we don't know how to pass the flags down?"); + + if (get_super_prefix()) + strbuf_addstr(&sb, get_super_prefix()); + strbuf_addstr(&sb, path); + strbuf_addch(&sb, '/'); + + cp.dir = path; + cp.git_cmd = 1; + cp.no_stdin = 1; + argv_array_pushl(&cp.args, "--super-prefix", sb.buf, + "submodule--helper", + "absorb-git-dirs", NULL); + prepare_submodule_repo_env(&cp.env_array); + if (run_command(&cp)) + die(_("could not recurse into submodule '%s'"), path); + + strbuf_release(&sb); + } } |