diff options
Diffstat (limited to 'submodule.c')
| -rw-r--r-- | submodule.c | 2046 |
1 files changed, 1510 insertions, 536 deletions
diff --git a/submodule.c b/submodule.c index 700bbf4fcb..fa25888783 100644 --- a/submodule.c +++ b/submodule.c @@ -1,4 +1,7 @@ #include "cache.h" +#include "repository.h" +#include "config.h" +#include "submodule-config.h" #include "submodule.h" #include "dir.h" #include "diff.h" @@ -11,40 +14,66 @@ #include "sha1-array.h" #include "argv-array.h" #include "blob.h" - -static struct string_list config_name_for_path; -static struct string_list config_fetch_recurse_submodules_for_name; -static struct string_list config_ignore_for_name; -static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND; -static struct string_list changed_submodule_paths; +#include "thread-utils.h" +#include "quote.h" +#include "remote.h" +#include "worktree.h" +#include "parse-options.h" + +static int config_update_recurse_submodules = RECURSE_SUBMODULES_OFF; +static struct string_list changed_submodule_names = STRING_LIST_INIT_DUP; static int initialized_fetch_ref_tips; -static struct sha1_array ref_tips_before_fetch; -static struct sha1_array ref_tips_after_fetch; +static struct oid_array ref_tips_before_fetch; +static struct oid_array ref_tips_after_fetch; /* - * The following flag is set if the .gitmodules file is unmerged. We then - * disable recursion for all submodules where .git/config doesn't have a - * matching config entry because we can't guess what might be configured in - * .gitmodules unless the user resolves the conflict. When a command line - * option is given (which always overrides configuration) this flag will be - * ignored. + * Check if the .gitmodules file is unmerged. Parsing of the .gitmodules file + * will be disabled because we can't guess what might be configured in + * .gitmodules unless the user resolves the conflict. */ -static int gitmodules_is_unmerged; +int is_gitmodules_unmerged(const struct index_state *istate) +{ + int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE)); + if (pos < 0) { /* .gitmodules not found or isn't merged */ + pos = -1 - pos; + if (istate->cache_nr > pos) { /* there is a .gitmodules */ + const struct cache_entry *ce = istate->cache[pos]; + if (ce_namelen(ce) == strlen(GITMODULES_FILE) && + !strcmp(ce->name, GITMODULES_FILE)) + return 1; + } + } + + return 0; +} /* - * This flag is set if the .gitmodules file had unstaged modifications on - * startup. This must be checked before allowing modifications to the - * .gitmodules file with the intention to stage them later, because when - * continuing we would stage the modifications the user didn't stage herself - * too. That might change in a future version when we learn to stage the - * changes we do ourselves without staging any previous modifications. + * Check if the .gitmodules file has unstaged modifications. This must be + * checked before allowing modifications to the .gitmodules file with the + * intention to stage them later, because when continuing we would stage the + * modifications the user didn't stage herself too. That might change in a + * future version when we learn to stage the changes we do ourselves without + * staging any previous modifications. */ -static int gitmodules_is_modified; +int is_staging_gitmodules_ok(const struct index_state *istate) +{ + int pos = index_name_pos(istate, GITMODULES_FILE, strlen(GITMODULES_FILE)); + + if ((pos >= 0) && (pos < istate->cache_nr)) { + struct stat st; + if (lstat(GITMODULES_FILE, &st) == 0 && + ce_match_stat(istate->cache[pos], &st, CE_MATCH_IGNORE_FSMONITOR) & DATA_CHANGED) + return 0; + } + return 1; +} -int is_staging_gitmodules_ok(void) +static int for_each_remote_ref_submodule(const char *submodule, + each_ref_fn fn, void *cb_data) { - return !gitmodules_is_modified; + return refs_for_each_remote_ref(get_submodule_ref_store(submodule), + fn, cb_data); } /* @@ -55,23 +84,23 @@ int is_staging_gitmodules_ok(void) int update_path_in_gitmodules(const char *oldpath, const char *newpath) { struct strbuf entry = STRBUF_INIT; - struct string_list_item *path_option; + const struct submodule *submodule; - if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */ + if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */ return -1; - if (gitmodules_is_unmerged) + if (is_gitmodules_unmerged(&the_index)) die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first")); - path_option = unsorted_string_list_lookup(&config_name_for_path, oldpath); - if (!path_option) { + submodule = submodule_from_path(&null_oid, oldpath); + if (!submodule || !submodule->name) { warning(_("Could not find section in .gitmodules where path=%s"), oldpath); return -1; } strbuf_addstr(&entry, "submodule."); - strbuf_addstr(&entry, path_option->util); + strbuf_addstr(&entry, submodule->name); strbuf_addstr(&entry, ".path"); - if (git_config_set_in_file(".gitmodules", entry.buf, newpath) < 0) { + if (git_config_set_in_file_gently(GITMODULES_FILE, entry.buf, newpath) < 0) { /* Maybe the user already did that, don't error out here */ warning(_("Could not update .gitmodules entry %s"), entry.buf); strbuf_release(&entry); @@ -89,22 +118,22 @@ int update_path_in_gitmodules(const char *oldpath, const char *newpath) int remove_path_from_gitmodules(const char *path) { struct strbuf sect = STRBUF_INIT; - struct string_list_item *path_option; + const struct submodule *submodule; - if (!file_exists(".gitmodules")) /* Do nothing without .gitmodules */ + if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */ return -1; - if (gitmodules_is_unmerged) + if (is_gitmodules_unmerged(&the_index)) die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first")); - path_option = unsorted_string_list_lookup(&config_name_for_path, path); - if (!path_option) { + submodule = submodule_from_path(&null_oid, path); + if (!submodule || !submodule->name) { warning(_("Could not find section in .gitmodules where path=%s"), path); return -1; } strbuf_addstr(§, "submodule."); - strbuf_addstr(§, path_option->util); - if (git_config_rename_section_in_file(".gitmodules", sect.buf, NULL) < 0) { + strbuf_addstr(§, submodule->name); + if (git_config_rename_section_in_file(GITMODULES_FILE, sect.buf, NULL) < 0) { /* Maybe the user already did that, don't error out here */ warning(_("Could not remove .gitmodules entry for %s"), path); strbuf_release(§); @@ -116,47 +145,23 @@ int remove_path_from_gitmodules(const char *path) void stage_updated_gitmodules(void) { - if (add_file_to_cache(".gitmodules", 0)) + if (add_file_to_cache(GITMODULES_FILE, 0)) die(_("staging updated .gitmodules failed")); } static int add_submodule_odb(const char *path) { struct strbuf objects_directory = STRBUF_INIT; - struct alternate_object_database *alt_odb; int ret = 0; - const char *git_dir; - strbuf_addf(&objects_directory, "%s/.git", path); - git_dir = read_gitfile(objects_directory.buf); - if (git_dir) { - strbuf_reset(&objects_directory); - strbuf_addstr(&objects_directory, git_dir); - } - strbuf_addstr(&objects_directory, "/objects/"); + ret = strbuf_git_path_submodule(&objects_directory, path, "objects/"); + if (ret) + goto done; if (!is_directory(objects_directory.buf)) { ret = -1; goto done; } - /* avoid adding it twice */ - for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next) - if (alt_odb->name - alt_odb->base == objects_directory.len && - !strncmp(alt_odb->base, objects_directory.buf, - objects_directory.len)) - goto done; - - alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb)); - alt_odb->next = alt_odb_list; - strcpy(alt_odb->base, objects_directory.buf); - alt_odb->name = alt_odb->base + objects_directory.len; - alt_odb->name[2] = '/'; - alt_odb->name[40] = '\0'; - alt_odb->name[41] = '\0'; - alt_odb_list = alt_odb; - - /* add possible alternates from the submodule */ - read_info_alternates(objects_directory.buf, 0); - prepare_alt_odb(); + add_to_alternates_memory(objects_directory.buf); done: strbuf_release(&objects_directory); return ret; @@ -165,134 +170,257 @@ done: void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt, const char *path) { - struct string_list_item *path_option, *ignore_option; - path_option = unsorted_string_list_lookup(&config_name_for_path, path); - if (path_option) { - ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util); - if (ignore_option) - handle_ignore_submodules_arg(diffopt, ignore_option->util); - else if (gitmodules_is_unmerged) - DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES); + const struct submodule *submodule = submodule_from_path(&null_oid, path); + if (submodule) { + const char *ignore; + char *key; + + key = xstrfmt("submodule.%s.ignore", submodule->name); + if (repo_config_get_string_const(the_repository, key, &ignore)) + ignore = submodule->ignore; + free(key); + + if (ignore) + handle_ignore_submodules_arg(diffopt, ignore); + else if (is_gitmodules_unmerged(&the_index)) + diffopt->flags.ignore_submodules = 1; } } -int submodule_config(const char *var, const char *value, void *cb) +/* Cheap function that only determines if we're interested in submodules at all */ +int git_default_submodule_config(const char *var, const char *value, void *cb) { - if (starts_with(var, "submodule.")) - return parse_submodule_config_option(var, value); - else if (!strcmp(var, "fetch.recursesubmodules")) { - config_fetch_recurse_submodules = parse_fetch_recurse_submodules_arg(var, value); + if (!strcmp(var, "submodule.recurse")) { + int v = git_config_bool(var, value) ? + RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF; + config_update_recurse_submodules = v; + } + return 0; +} + +int option_parse_recurse_submodules_worktree_updater(const struct option *opt, + const char *arg, int unset) +{ + if (unset) { + config_update_recurse_submodules = RECURSE_SUBMODULES_OFF; return 0; } + if (arg) + config_update_recurse_submodules = + parse_update_recurse_submodules_arg(opt->long_name, + arg); + else + config_update_recurse_submodules = RECURSE_SUBMODULES_ON; + return 0; } -void gitmodules_config(void) -{ - const char *work_tree = get_git_work_tree(); - if (work_tree) { - struct strbuf gitmodules_path = STRBUF_INIT; - int pos; - strbuf_addstr(&gitmodules_path, work_tree); - strbuf_addstr(&gitmodules_path, "/.gitmodules"); - if (read_cache() < 0) - die("index file corrupt"); - pos = cache_name_pos(".gitmodules", 11); - if (pos < 0) { /* .gitmodules not found or isn't merged */ - pos = -1 - pos; - if (active_nr > pos) { /* there is a .gitmodules */ - const struct cache_entry *ce = active_cache[pos]; - if (ce_namelen(ce) == 11 && - !memcmp(ce->name, ".gitmodules", 11)) - gitmodules_is_unmerged = 1; - } - } else if (pos < active_nr) { - struct stat st; - if (lstat(".gitmodules", &st) == 0 && - ce_match_stat(active_cache[pos], &st, 0) & DATA_CHANGED) - gitmodules_is_modified = 1; +/* + * Determine if a submodule has been initialized at a given 'path' + */ +int is_submodule_active(struct repository *repo, const char *path) +{ + int ret = 0; + char *key = NULL; + char *value = NULL; + const struct string_list *sl; + const struct submodule *module; + + module = submodule_from_cache(repo, &null_oid, path); + + /* early return if there isn't a path->module mapping */ + if (!module) + return 0; + + /* submodule.<name>.active is set */ + key = xstrfmt("submodule.%s.active", module->name); + if (!repo_config_get_bool(repo, key, &ret)) { + free(key); + return ret; + } + free(key); + + /* submodule.active is set */ + sl = repo_config_get_value_multi(repo, "submodule.active"); + if (sl) { + struct pathspec ps; + struct argv_array args = ARGV_ARRAY_INIT; + const struct string_list_item *item; + + for_each_string_list_item(item, sl) { + argv_array_push(&args, item->string); } - if (!gitmodules_is_unmerged) - git_config_from_file(submodule_config, gitmodules_path.buf, NULL); - strbuf_release(&gitmodules_path); + parse_pathspec(&ps, 0, 0, NULL, args.argv); + ret = match_pathspec(&ps, path, strlen(path), 0, NULL, 1); + + argv_array_clear(&args); + clear_pathspec(&ps); + return ret; } + + /* fallback to checking if the URL is set */ + key = xstrfmt("submodule.%s.url", module->name); + ret = !repo_config_get_string(repo, key, &value); + + free(value); + free(key); + return ret; } -int parse_submodule_config_option(const char *var, const char *value) +int is_submodule_populated_gently(const char *path, int *return_error_code) { - struct string_list_item *config; - const char *name, *key; - int namelen; + int ret = 0; + char *gitdir = xstrfmt("%s/.git", path); - if (parse_config_key(var, "submodule", &name, &namelen, &key) < 0 || !name) - return 0; + if (resolve_gitdir_gently(gitdir, return_error_code)) + ret = 1; - if (!strcmp(key, "path")) { - if (!value) - return config_error_nonbool(var); + free(gitdir); + return ret; +} - config = unsorted_string_list_lookup(&config_name_for_path, value); - if (config) - free(config->util); - else - config = string_list_append(&config_name_for_path, xstrdup(value)); - config->util = xmemdupz(name, namelen); - } else if (!strcmp(key, "fetchrecursesubmodules")) { - char *name_cstr = xmemdupz(name, namelen); - config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name_cstr); - if (!config) - config = string_list_append(&config_fetch_recurse_submodules_for_name, name_cstr); - else - free(name_cstr); - config->util = (void *)(intptr_t)parse_fetch_recurse_submodules_arg(var, value); - } else if (!strcmp(key, "ignore")) { - char *name_cstr; +/* + * Dies if the provided 'prefix' corresponds to an unpopulated submodule + */ +void die_in_unpopulated_submodule(const struct index_state *istate, + const char *prefix) +{ + int i, prefixlen; - if (!value) - return config_error_nonbool(var); + if (!prefix) + return; - if (strcmp(value, "untracked") && strcmp(value, "dirty") && - strcmp(value, "all") && strcmp(value, "none")) { - warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var); - return 0; - } + prefixlen = strlen(prefix); - name_cstr = xmemdupz(name, namelen); - config = unsorted_string_list_lookup(&config_ignore_for_name, name_cstr); - if (config) { - free(config->util); - free(name_cstr); - } else - config = string_list_append(&config_ignore_for_name, name_cstr); - config->util = xstrdup(value); - return 0; + for (i = 0; i < istate->cache_nr; i++) { + struct cache_entry *ce = istate->cache[i]; + int ce_len = ce_namelen(ce); + + if (!S_ISGITLINK(ce->ce_mode)) + continue; + if (prefixlen <= ce_len) + continue; + if (strncmp(ce->name, prefix, ce_len)) + continue; + if (prefix[ce_len] != '/') + continue; + + die(_("in unpopulated submodule '%s'"), ce->name); } +} + +/* + * Dies if any paths in the provided pathspec descends into a submodule + */ +void die_path_inside_submodule(const struct index_state *istate, + const struct pathspec *ps) +{ + int i, j; + + for (i = 0; i < istate->cache_nr; i++) { + struct cache_entry *ce = istate->cache[i]; + int ce_len = ce_namelen(ce); + + if (!S_ISGITLINK(ce->ce_mode)) + continue; + + for (j = 0; j < ps->nr ; j++) { + const struct pathspec_item *item = &ps->items[j]; + + if (item->len <= ce_len) + continue; + if (item->match[ce_len] != '/') + continue; + if (strncmp(ce->name, item->match, ce_len)) + continue; + if (item->len == ce_len + 1) + continue; + + die(_("Pathspec '%s' is in submodule '%.*s'"), + item->original, ce_len, ce->name); + } + } +} + +enum submodule_update_type parse_submodule_update_type(const char *value) +{ + if (!strcmp(value, "none")) + return SM_UPDATE_NONE; + else if (!strcmp(value, "checkout")) + return SM_UPDATE_CHECKOUT; + else if (!strcmp(value, "rebase")) + return SM_UPDATE_REBASE; + else if (!strcmp(value, "merge")) + return SM_UPDATE_MERGE; + else if (*value == '!') + return SM_UPDATE_COMMAND; + else + return SM_UPDATE_UNSPECIFIED; +} + +int parse_submodule_update_strategy(const char *value, + struct submodule_update_strategy *dst) +{ + enum submodule_update_type type; + + free((void*)dst->command); + dst->command = NULL; + + type = parse_submodule_update_type(value); + if (type == SM_UPDATE_UNSPECIFIED) + return -1; + + dst->type = type; + if (type == SM_UPDATE_COMMAND) + dst->command = xstrdup(value + 1); + return 0; } +const char *submodule_strategy_to_string(const struct submodule_update_strategy *s) +{ + struct strbuf sb = STRBUF_INIT; + switch (s->type) { + case SM_UPDATE_CHECKOUT: + return "checkout"; + case SM_UPDATE_MERGE: + return "merge"; + case SM_UPDATE_REBASE: + return "rebase"; + case SM_UPDATE_NONE: + return "none"; + case SM_UPDATE_UNSPECIFIED: + return NULL; + case SM_UPDATE_COMMAND: + strbuf_addf(&sb, "!%s", s->command); + return strbuf_detach(&sb, NULL); + } + return NULL; +} + void handle_ignore_submodules_arg(struct diff_options *diffopt, const char *arg) { - DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES); - DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES); - DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES); + diffopt->flags.ignore_submodules = 0; + diffopt->flags.ignore_untracked_in_submodules = 0; + diffopt->flags.ignore_dirty_submodules = 0; if (!strcmp(arg, "all")) - DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES); + diffopt->flags.ignore_submodules = 1; else if (!strcmp(arg, "untracked")) - DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES); + diffopt->flags.ignore_untracked_in_submodules = 1; else if (!strcmp(arg, "dirty")) - DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES); + diffopt->flags.ignore_dirty_submodules = 1; else if (strcmp(arg, "none")) die("bad --ignore-submodules argument: %s", arg); } static int prepare_submodule_summary(struct rev_info *rev, const char *path, struct commit *left, struct commit *right, - int *fast_forward, int *fast_backward) + struct commit_list *merge_bases) { - struct commit_list *merge_bases, *list; + struct commit_list *list; init_revisions(rev, NULL); setup_revisions(0, NULL, rev, NULL); @@ -301,24 +429,15 @@ static int prepare_submodule_summary(struct rev_info *rev, const char *path, left->object.flags |= SYMMETRIC_LEFT; add_pending_object(rev, &left->object, path); add_pending_object(rev, &right->object, path); - merge_bases = get_merge_bases(left, right); - if (merge_bases) { - if (merge_bases->item == left) - *fast_forward = 1; - else if (merge_bases->item == right) - *fast_backward = 1; - } for (list = merge_bases; list; list = list->next) { list->item->object.flags |= UNINTERESTING; add_pending_object(rev, &list->item->object, - sha1_to_hex(list->item->object.sha1)); + oid_to_hex(&list->item->object.oid)); } return prepare_revision_walk(rev); } -static void print_submodule_summary(struct rev_info *rev, FILE *f, - const char *line_prefix, - const char *del, const char *add, const char *reset) +static void print_submodule_summary(struct rev_info *rev, struct diff_options *o) { static const char format[] = " %m %s"; struct strbuf sb = STRBUF_INIT; @@ -329,97 +448,348 @@ static void print_submodule_summary(struct rev_info *rev, FILE *f, ctx.date_mode = rev->date_mode; ctx.output_encoding = get_log_output_encoding(); strbuf_setlen(&sb, 0); - strbuf_addstr(&sb, line_prefix); - if (commit->object.flags & SYMMETRIC_LEFT) { - if (del) - strbuf_addstr(&sb, del); - } - else if (add) - strbuf_addstr(&sb, add); format_commit_message(commit, format, &sb, &ctx); - if (reset) - strbuf_addstr(&sb, reset); strbuf_addch(&sb, '\n'); - fprintf(f, "%s", sb.buf); + if (commit->object.flags & SYMMETRIC_LEFT) + diff_emit_submodule_del(o, sb.buf); + else + diff_emit_submodule_add(o, sb.buf); } strbuf_release(&sb); } -int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg) +static void prepare_submodule_repo_env_no_git_dir(struct argv_array *out) { - switch (git_config_maybe_bool(opt, arg)) { - case 1: - return RECURSE_SUBMODULES_ON; - case 0: - return RECURSE_SUBMODULES_OFF; - default: - if (!strcmp(arg, "on-demand")) - return RECURSE_SUBMODULES_ON_DEMAND; - die("bad %s argument: %s", opt, arg); + const char * const *var; + + for (var = local_repo_env; *var; var++) { + if (strcmp(*var, CONFIG_DATA_ENVIRONMENT)) + argv_array_push(out, *var); } } -void show_submodule_summary(FILE *f, const char *path, - const char *line_prefix, - unsigned char one[20], unsigned char two[20], - unsigned dirty_submodule, const char *meta, - const char *del, const char *add, const char *reset) +void prepare_submodule_repo_env(struct argv_array *out) +{ + prepare_submodule_repo_env_no_git_dir(out); + argv_array_pushf(out, "%s=%s", GIT_DIR_ENVIRONMENT, + DEFAULT_GIT_DIR_ENVIRONMENT); +} + +/* Helper function to display the submodule header line prior to the full + * summary output. If it can locate the submodule objects directory it will + * attempt to lookup both the left and right commits and put them into the + * left and right pointers. + */ +static void show_submodule_header(struct diff_options *o, const char *path, + struct object_id *one, struct object_id *two, + unsigned dirty_submodule, + struct commit **left, struct commit **right, + struct commit_list **merge_bases) { - struct rev_info rev; - struct commit *left = NULL, *right = NULL; const char *message = NULL; struct strbuf sb = STRBUF_INIT; int fast_forward = 0, fast_backward = 0; - if (is_null_sha1(two)) - message = "(submodule deleted)"; - else if (add_submodule_odb(path)) - message = "(not checked out)"; - else if (is_null_sha1(one)) + if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) + diff_emit_submodule_untracked(o, path); + + if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED) + diff_emit_submodule_modified(o, path); + + if (is_null_oid(one)) message = "(new submodule)"; - else if (!(left = lookup_commit_reference(one)) || - !(right = lookup_commit_reference(two))) + else if (is_null_oid(two)) + message = "(submodule deleted)"; + + if (add_submodule_odb(path)) { + if (!message) + message = "(commits not present)"; + goto output_header; + } + + /* + * Attempt to lookup the commit references, and determine if this is + * a fast forward or fast backwards update. + */ + *left = lookup_commit_reference(one); + *right = lookup_commit_reference(two); + + /* + * Warn about missing commits in the submodule project, but only if + * they aren't null. + */ + if ((!is_null_oid(one) && !*left) || + (!is_null_oid(two) && !*right)) message = "(commits not present)"; - else if (prepare_submodule_summary(&rev, path, left, right, - &fast_forward, &fast_backward)) - message = "(revision walker failed)"; - if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) - fprintf(f, "%sSubmodule %s contains untracked content\n", - line_prefix, path); - if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED) - fprintf(f, "%sSubmodule %s contains modified content\n", - line_prefix, path); + *merge_bases = get_merge_bases(*left, *right); + if (*merge_bases) { + if ((*merge_bases)->item == *left) + fast_forward = 1; + else if ((*merge_bases)->item == *right) + fast_backward = 1; + } - if (!hashcmp(one, two)) { + if (!oidcmp(one, two)) { strbuf_release(&sb); return; } - strbuf_addf(&sb, "%s%sSubmodule %s %s..", line_prefix, meta, path, - find_unique_abbrev(one, DEFAULT_ABBREV)); - if (!fast_backward && !fast_forward) - strbuf_addch(&sb, '.'); - strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV)); +output_header: + strbuf_addf(&sb, "Submodule %s ", path); + strbuf_add_unique_abbrev(&sb, one->hash, DEFAULT_ABBREV); + strbuf_addstr(&sb, (fast_backward || fast_forward) ? ".." : "..."); + strbuf_add_unique_abbrev(&sb, two->hash, DEFAULT_ABBREV); if (message) - strbuf_addf(&sb, " %s%s\n", message, reset); + strbuf_addf(&sb, " %s\n", message); else - strbuf_addf(&sb, "%s:%s\n", fast_backward ? " (rewind)" : "", reset); - fwrite(sb.buf, sb.len, 1, f); + strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : ""); + diff_emit_submodule_header(o, sb.buf); + + strbuf_release(&sb); +} + +void show_submodule_summary(struct diff_options *o, const char *path, + struct object_id *one, struct object_id *two, + unsigned dirty_submodule) +{ + struct rev_info rev; + struct commit *left = NULL, *right = NULL; + struct commit_list *merge_bases = NULL; - if (!message) /* only NULL if we succeeded in setting up the walk */ - print_submodule_summary(&rev, f, line_prefix, del, add, reset); + show_submodule_header(o, path, one, two, dirty_submodule, + &left, &right, &merge_bases); + + /* + * If we don't have both a left and a right pointer, there is no + * reason to try and display a summary. The header line should contain + * all the information the user needs. + */ + if (!left || !right) + goto out; + + /* Treat revision walker failure the same as missing commits */ + if (prepare_submodule_summary(&rev, path, left, right, merge_bases)) { + diff_emit_submodule_error(o, "(revision walker failed)\n"); + goto out; + } + + print_submodule_summary(&rev, o); + +out: + if (merge_bases) + free_commit_list(merge_bases); + clear_commit_marks(left, ~0); + clear_commit_marks(right, ~0); +} + +void show_submodule_inline_diff(struct diff_options *o, const char *path, + struct object_id *one, struct object_id *two, + unsigned dirty_submodule) +{ + const struct object_id *old = the_hash_algo->empty_tree, *new = the_hash_algo->empty_tree; + struct commit *left = NULL, *right = NULL; + struct commit_list *merge_bases = NULL; + struct child_process cp = CHILD_PROCESS_INIT; + struct strbuf sb = STRBUF_INIT; + + show_submodule_header(o, path, one, two, dirty_submodule, + &left, &right, &merge_bases); + + /* We need a valid left and right commit to display a difference */ + if (!(left || is_null_oid(one)) || + !(right || is_null_oid(two))) + goto done; + + if (left) + old = one; + if (right) + new = two; + + cp.git_cmd = 1; + cp.dir = path; + cp.out = -1; + cp.no_stdin = 1; + + /* TODO: other options may need to be passed here. */ + argv_array_pushl(&cp.args, "diff", "--submodule=diff", NULL); + argv_array_pushf(&cp.args, "--color=%s", want_color(o->use_color) ? + "always" : "never"); + + if (o->flags.reverse_diff) { + argv_array_pushf(&cp.args, "--src-prefix=%s%s/", + o->b_prefix, path); + argv_array_pushf(&cp.args, "--dst-prefix=%s%s/", + o->a_prefix, path); + } else { + argv_array_pushf(&cp.args, "--src-prefix=%s%s/", + o->a_prefix, path); + argv_array_pushf(&cp.args, "--dst-prefix=%s%s/", + o->b_prefix, path); + } + argv_array_push(&cp.args, oid_to_hex(old)); + /* + * If the submodule has modified content, we will diff against the + * work tree, under the assumption that the user has asked for the + * diff format and wishes to actually see all differences even if they + * haven't yet been committed to the submodule yet. + */ + if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED)) + argv_array_push(&cp.args, oid_to_hex(new)); + + prepare_submodule_repo_env(&cp.env_array); + if (start_command(&cp)) + diff_emit_submodule_error(o, "(diff failed)\n"); + + while (strbuf_getwholeline_fd(&sb, cp.out, '\n') != EOF) + diff_emit_submodule_pipethrough(o, sb.buf, sb.len); + + if (finish_command(&cp)) + diff_emit_submodule_error(o, "(diff failed)\n"); + +done: + strbuf_release(&sb); + if (merge_bases) + free_commit_list(merge_bases); if (left) clear_commit_marks(left, ~0); if (right) clear_commit_marks(right, ~0); +} - strbuf_release(&sb); +int should_update_submodules(void) +{ + return config_update_recurse_submodules == RECURSE_SUBMODULES_ON; +} + +const struct submodule *submodule_from_ce(const struct cache_entry *ce) +{ + if (!S_ISGITLINK(ce->ce_mode)) + return NULL; + + if (!should_update_submodules()) + return NULL; + + return submodule_from_path(&null_oid, ce->name); +} + +static struct oid_array *submodule_commits(struct string_list *submodules, + const char *name) +{ + struct string_list_item *item; + + item = string_list_insert(submodules, name); + if (item->util) + return (struct oid_array *) item->util; + + /* NEEDSWORK: should we have oid_array_init()? */ + item->util = xcalloc(1, sizeof(struct oid_array)); + return (struct oid_array *) item->util; +} + +struct collect_changed_submodules_cb_data { + struct string_list *changed; + const struct object_id *commit_oid; +}; + +/* + * this would normally be two functions: default_name_from_path() and + * path_from_default_name(). Since the default name is the same as + * the submodule path we can get away with just one function which only + * checks whether there is a submodule in the working directory at that + * location. + */ +static const char *default_name_or_path(const char *path_or_name) +{ + int error_code; + + if (!is_submodule_populated_gently(path_or_name, &error_code)) + return NULL; + + return path_or_name; +} + +static void collect_changed_submodules_cb(struct diff_queue_struct *q, + struct diff_options *options, + void *data) +{ + struct collect_changed_submodules_cb_data *me = data; + struct string_list *changed = me->changed; + const struct object_id *commit_oid = me->commit_oid; + int i; + + for (i = 0; i < q->nr; i++) { + struct diff_filepair *p = q->queue[i]; + struct oid_array *commits; + const struct submodule *submodule; + const char *name; + + if (!S_ISGITLINK(p->two->mode)) + continue; + + submodule = submodule_from_path(commit_oid, p->two->path); + if (submodule) + name = submodule->name; + else { + name = default_name_or_path(p->two->path); + /* make sure name does not collide with existing one */ + submodule = submodule_from_name(commit_oid, name); + if (submodule) { + warning("Submodule in commit %s at path: " + "'%s' collides with a submodule named " + "the same. Skipping it.", + oid_to_hex(commit_oid), name); + name = NULL; + } + } + + if (!name) + continue; + + commits = submodule_commits(changed, name); + oid_array_append(commits, &p->two->oid); + } } -void set_config_fetch_recurse_submodules(int value) +/* + * Collect the paths of submodules in 'changed' which have changed based on + * the revisions as specified in 'argv'. Each entry in 'changed' will also + * have a corresponding 'struct oid_array' (in the 'util' field) which lists + * what the submodule pointers were updated to during the change. + */ +static void collect_changed_submodules(struct string_list *changed, + struct argv_array *argv) { - config_fetch_recurse_submodules = value; + struct rev_info rev; + const struct commit *commit; + + init_revisions(&rev, NULL); + setup_revisions(argv->argc, argv->argv, &rev, NULL); + if (prepare_revision_walk(&rev)) + die("revision walk setup failed"); + + while ((commit = get_revision(&rev))) { + struct rev_info diff_rev; + struct collect_changed_submodules_cb_data data; + data.changed = changed; + data.commit_oid = &commit->object.oid; + + init_revisions(&diff_rev, NULL); + diff_rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK; + diff_rev.diffopt.format_callback = collect_changed_submodules_cb; + diff_rev.diffopt.format_callback_data = &data; + diff_tree_combined_merge(commit, 1, &diff_rev); + } + + reset_revision_walk(); +} + +static void free_submodules_oids(struct string_list *submodules) +{ + struct string_list_item *item; + for_each_string_list_item(item, submodules) + oid_array_clear((struct oid_array *) item->util); + string_list_clear(submodules, 1); } static int has_remote(const char *refname, const struct object_id *oid, @@ -428,27 +798,118 @@ static int has_remote(const char *refname, const struct object_id *oid, return 1; } -static int submodule_needs_pushing(const char *path, const unsigned char sha1[20]) +static int append_oid_to_argv(const struct object_id *oid, void *data) +{ + struct argv_array *argv = data; + argv_array_push(argv, oid_to_hex(oid)); + return 0; +} + +struct has_commit_data { + int result; + const char *path; +}; + +static int check_has_commit(const struct object_id *oid, void *data) +{ + struct has_commit_data *cb = data; + + enum object_type type = sha1_object_info(oid->hash, NULL); + + switch (type) { + case OBJ_COMMIT: + return 0; + case OBJ_BAD: + /* + * Object is missing or invalid. If invalid, an error message + * has already been printed. + */ + cb->result = 0; + return 0; + default: + die(_("submodule entry '%s' (%s) is a %s, not a commit"), + cb->path, oid_to_hex(oid), typename(type)); + } +} + +static int submodule_has_commits(const char *path, struct oid_array *commits) +{ + struct has_commit_data has_commit = { 1, path }; + + /* + * Perform a cheap, but incorrect check for the existence of 'commits'. + * This is done by adding the submodule's object store to the in-core + * object store, and then querying for each commit's existence. If we + * do not have the commit object anywhere, there is no chance we have + * it in the object store of the correct submodule and have it + * reachable from a ref, so we can fail early without spawning rev-list + * which is expensive. + */ + if (add_submodule_odb(path)) + return 0; + + oid_array_for_each_unique(commits, check_has_commit, &has_commit); + + if (has_commit.result) { + /* + * Even if the submodule is checked out and the commit is + * present, make sure it exists in the submodule's object store + * and that it is reachable from a ref. + */ + struct child_process cp = CHILD_PROCESS_INIT; + struct strbuf out = STRBUF_INIT; + + argv_array_pushl(&cp.args, "rev-list", "-n", "1", NULL); + oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args); + argv_array_pushl(&cp.args, "--not", "--all", NULL); + + prepare_submodule_repo_env(&cp.env_array); + cp.git_cmd = 1; + cp.no_stdin = 1; + cp.dir = path; + + if (capture_command(&cp, &out, GIT_MAX_HEXSZ + 1) || out.len) + has_commit.result = 0; + + strbuf_release(&out); + } + + return has_commit.result; +} + +static int submodule_needs_pushing(const char *path, struct oid_array *commits) { - if (add_submodule_odb(path) || !lookup_commit_reference(sha1)) + if (!submodule_has_commits(path, commits)) + /* + * NOTE: We do consider it safe to return "no" here. The + * correct answer would be "We do not know" instead of + * "No push needed", but it is quite hard to change + * the submodule pointer without having the submodule + * around. If a user did however change the submodules + * without having the submodule around, this indicates + * an expert who knows what they are doing or a + * maintainer integrating work from other people. In + * both cases it should be safe to skip this check. + */ return 0; if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) { struct child_process cp = CHILD_PROCESS_INIT; - const char *argv[] = {"rev-list", NULL, "--not", "--remotes", "-n", "1" , NULL}; struct strbuf buf = STRBUF_INIT; int needs_pushing = 0; - argv[1] = sha1_to_hex(sha1); - cp.argv = argv; - cp.env = local_repo_env; + argv_array_push(&cp.args, "rev-list"); + oid_array_for_each_unique(commits, append_oid_to_argv, &cp.args); + argv_array_pushl(&cp.args, "--not", "--remotes", "-n", "1" , NULL); + + 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 rev-list %s --not --remotes -n 1' command in submodule %s", - sha1_to_hex(sha1), path); + die("Could not run 'git rev-list <commits> --not --remotes -n 1' command in submodule %s", + path); if (strbuf_read(&buf, cp.out, 41)) needs_pushing = 1; finish_command(&cp); @@ -460,75 +921,75 @@ static int submodule_needs_pushing(const char *path, const unsigned char sha1[20 return 0; } -static void collect_submodules_from_diff(struct diff_queue_struct *q, - struct diff_options *options, - void *data) +int find_unpushed_submodules(struct oid_array *commits, + const char *remotes_name, struct string_list *needs_pushing) { - int i; - struct string_list *needs_pushing = data; - - for (i = 0; i < q->nr; i++) { - struct diff_filepair *p = q->queue[i]; - if (!S_ISGITLINK(p->two->mode)) - continue; - if (submodule_needs_pushing(p->two->path, p->two->sha1)) - string_list_insert(needs_pushing, p->two->path); - } -} + struct string_list submodules = STRING_LIST_INIT_DUP; + struct string_list_item *name; + struct argv_array argv = ARGV_ARRAY_INIT; -static void find_unpushed_submodule_commits(struct commit *commit, - struct string_list *needs_pushing) -{ - struct rev_info rev; + /* argv.argv[0] will be ignored by setup_revisions */ + argv_array_push(&argv, "find_unpushed_submodules"); + oid_array_for_each_unique(commits, append_oid_to_argv, &argv); + argv_array_push(&argv, "--not"); + argv_array_pushf(&argv, "--remotes=%s", remotes_name); - init_revisions(&rev, NULL); - rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK; - rev.diffopt.format_callback = collect_submodules_from_diff; - rev.diffopt.format_callback_data = needs_pushing; - diff_tree_combined_merge(commit, 1, &rev); -} + collect_changed_submodules(&submodules, &argv); -int find_unpushed_submodules(unsigned char new_sha1[20], - const char *remotes_name, struct string_list *needs_pushing) -{ - struct rev_info rev; - struct commit *commit; - const char *argv[] = {NULL, NULL, "--not", "NULL", NULL}; - int argc = ARRAY_SIZE(argv) - 1; - char *sha1_copy; + for_each_string_list_item(name, &submodules) { + struct oid_array *commits = name->util; + const struct submodule *submodule; + const char *path = NULL; - struct strbuf remotes_arg = STRBUF_INIT; + submodule = submodule_from_name(&null_oid, name->string); + if (submodule) + path = submodule->path; + else + path = default_name_or_path(name->string); - strbuf_addf(&remotes_arg, "--remotes=%s", remotes_name); - init_revisions(&rev, NULL); - sha1_copy = xstrdup(sha1_to_hex(new_sha1)); - argv[1] = sha1_copy; - argv[3] = remotes_arg.buf; - setup_revisions(argc, argv, &rev, NULL); - if (prepare_revision_walk(&rev)) - die("revision walk setup failed"); + if (!path) + continue; - while ((commit = get_revision(&rev)) != NULL) - find_unpushed_submodule_commits(commit, needs_pushing); + if (submodule_needs_pushing(path, commits)) + string_list_insert(needs_pushing, path); + } - reset_revision_walk(); - free(sha1_copy); - strbuf_release(&remotes_arg); + free_submodules_oids(&submodules); + argv_array_clear(&argv); return needs_pushing->nr; } -static int push_submodule(const char *path) +static int push_submodule(const char *path, + const struct remote *remote, + const char **refspec, int refspec_nr, + const struct string_list *push_options, + int dry_run) { if (add_submodule_odb(path)) return 1; if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) { struct child_process cp = CHILD_PROCESS_INIT; - const char *argv[] = {"push", NULL}; + argv_array_push(&cp.args, "push"); + if (dry_run) + argv_array_push(&cp.args, "--dry-run"); + + if (push_options && push_options->nr) { + const struct string_list_item *item; + for_each_string_list_item(item, push_options) + argv_array_pushf(&cp.args, "--push-option=%s", + item->string); + } + + if (remote->origin != REMOTE_UNCONFIGURED) { + int i; + argv_array_push(&cp.args, remote->name); + for (i = 0; i < refspec_nr; i++) + argv_array_push(&cp.args, refspec[i]); + } - cp.argv = argv; - cp.env = local_repo_env; + prepare_submodule_repo_env(&cp.env_array); cp.git_cmd = 1; cp.no_stdin = 1; cp.dir = path; @@ -540,18 +1001,79 @@ static int push_submodule(const char *path) return 1; } -int push_unpushed_submodules(unsigned char new_sha1[20], const char *remotes_name) +/* + * Perform a check in the submodule to see if the remote and refspec work. + * Die if the submodule can't be pushed. + */ +static void submodule_push_check(const char *path, const char *head, + const struct remote *remote, + const char **refspec, int refspec_nr) +{ + struct child_process cp = CHILD_PROCESS_INIT; + int i; + + argv_array_push(&cp.args, "submodule--helper"); + argv_array_push(&cp.args, "push-check"); + argv_array_push(&cp.args, head); + argv_array_push(&cp.args, remote->name); + + for (i = 0; i < refspec_nr; i++) + argv_array_push(&cp.args, refspec[i]); + + prepare_submodule_repo_env(&cp.env_array); + cp.git_cmd = 1; + cp.no_stdin = 1; + cp.no_stdout = 1; + cp.dir = path; + + /* + * Simply indicate if 'submodule--helper push-check' failed. + * More detailed error information will be provided by the + * child process. + */ + if (run_command(&cp)) + die("process for submodule '%s' failed", path); +} + +int push_unpushed_submodules(struct oid_array *commits, + const struct remote *remote, + const char **refspec, int refspec_nr, + const struct string_list *push_options, + int dry_run) { int i, ret = 1; struct string_list needs_pushing = STRING_LIST_INIT_DUP; - if (!find_unpushed_submodules(new_sha1, remotes_name, &needs_pushing)) + if (!find_unpushed_submodules(commits, remote->name, &needs_pushing)) return 1; + /* + * Verify that the remote and refspec can be propagated to all + * submodules. This check can be skipped if the remote and refspec + * won't be propagated due to the remote being unconfigured (e.g. a URL + * instead of a remote name). + */ + if (remote->origin != REMOTE_UNCONFIGURED) { + char *head; + struct object_id head_oid; + + head = resolve_refdup("HEAD", 0, &head_oid, NULL); + if (!head) + die(_("Failed to resolve HEAD as a valid ref.")); + + for (i = 0; i < needs_pushing.nr; i++) + submodule_push_check(needs_pushing.items[i].string, + head, remote, + refspec, refspec_nr); + free(head); + } + + /* Actually push the submodules */ for (i = 0; i < needs_pushing.nr; i++) { const char *path = needs_pushing.items[i].string; fprintf(stderr, "Pushing submodule '%s'\n", path); - if (!push_submodule(path)) { + if (!push_submodule(path, remote, refspec, refspec_nr, + push_options, dry_run)) { fprintf(stderr, "Unable to push submodule '%s'\n", path); ret = 0; } @@ -562,293 +1084,344 @@ int push_unpushed_submodules(unsigned char new_sha1[20], const char *remotes_nam return ret; } -static int is_submodule_commit_present(const char *path, unsigned char sha1[20]) -{ - int is_present = 0; - if (!add_submodule_odb(path) && lookup_commit_reference(sha1)) { - /* Even if the submodule is checked out and the commit is - * present, make sure it is reachable from a ref. */ - struct child_process cp = CHILD_PROCESS_INIT; - const char *argv[] = {"rev-list", "-n", "1", NULL, "--not", "--all", NULL}; - struct strbuf buf = STRBUF_INIT; - - argv[3] = sha1_to_hex(sha1); - cp.argv = argv; - cp.env = local_repo_env; - cp.git_cmd = 1; - cp.no_stdin = 1; - cp.dir = path; - if (!capture_command(&cp, &buf, 1024) && !buf.len) - is_present = 1; - - strbuf_release(&buf); - } - return is_present; -} - -static void submodule_collect_changed_cb(struct diff_queue_struct *q, - struct diff_options *options, - void *data) +static int append_oid_to_array(const char *ref, const struct object_id *oid, + int flags, void *data) { - int i; - for (i = 0; i < q->nr; i++) { - struct diff_filepair *p = q->queue[i]; - if (!S_ISGITLINK(p->two->mode)) - continue; - - if (S_ISGITLINK(p->one->mode)) { - /* NEEDSWORK: We should honor the name configured in - * the .gitmodules file of the commit we are examining - * here to be able to correctly follow submodules - * being moved around. */ - struct string_list_item *path; - path = unsorted_string_list_lookup(&changed_submodule_paths, p->two->path); - if (!path && !is_submodule_commit_present(p->two->path, p->two->sha1)) - string_list_append(&changed_submodule_paths, xstrdup(p->two->path)); - } else { - /* Submodule is new or was moved here */ - /* NEEDSWORK: When the .git directories of submodules - * live inside the superprojects .git directory some - * day we should fetch new submodules directly into - * that location too when config or options request - * that so they can be checked out from there. */ - continue; - } - } -} - -static int add_sha1_to_array(const char *ref, const struct object_id *oid, - int flags, void *data) -{ - sha1_array_append(data, oid->hash); + struct oid_array *array = data; + oid_array_append(array, oid); return 0; } -void check_for_new_submodule_commits(unsigned char new_sha1[20]) +void check_for_new_submodule_commits(struct object_id *oid) { if (!initialized_fetch_ref_tips) { - for_each_ref(add_sha1_to_array, &ref_tips_before_fetch); + for_each_ref(append_oid_to_array, &ref_tips_before_fetch); initialized_fetch_ref_tips = 1; } - sha1_array_append(&ref_tips_after_fetch, new_sha1); -} - -static void add_sha1_to_argv(const unsigned char sha1[20], void *data) -{ - argv_array_push(data, sha1_to_hex(sha1)); + oid_array_append(&ref_tips_after_fetch, oid); } static void calculate_changed_submodule_paths(void) { - struct rev_info rev; - struct commit *commit; struct argv_array argv = ARGV_ARRAY_INIT; + struct string_list changed_submodules = STRING_LIST_INIT_DUP; + const struct string_list_item *name; /* No need to check if there are no submodules configured */ - if (!config_name_for_path.nr) + if (!submodule_from_path(NULL, NULL)) return; - init_revisions(&rev, NULL); argv_array_push(&argv, "--"); /* argv[0] program name */ - sha1_array_for_each_unique(&ref_tips_after_fetch, - add_sha1_to_argv, &argv); + oid_array_for_each_unique(&ref_tips_after_fetch, + append_oid_to_argv, &argv); argv_array_push(&argv, "--not"); - sha1_array_for_each_unique(&ref_tips_before_fetch, - add_sha1_to_argv, &argv); - setup_revisions(argv.argc, argv.argv, &rev, NULL); - if (prepare_revision_walk(&rev)) - die("revision walk setup failed"); + oid_array_for_each_unique(&ref_tips_before_fetch, + append_oid_to_argv, &argv); /* * Collect all submodules (whether checked out or not) for which new - * commits have been recorded upstream in "changed_submodule_paths". + * commits have been recorded upstream in "changed_submodule_names". */ - while ((commit = get_revision(&rev))) { - struct commit_list *parent = commit->parents; - while (parent) { - struct diff_options diff_opts; - diff_setup(&diff_opts); - DIFF_OPT_SET(&diff_opts, RECURSIVE); - diff_opts.output_format |= DIFF_FORMAT_CALLBACK; - diff_opts.format_callback = submodule_collect_changed_cb; - diff_setup_done(&diff_opts); - diff_tree_sha1(parent->item->object.sha1, commit->object.sha1, "", &diff_opts); - diffcore_std(&diff_opts); - diff_flush(&diff_opts); - parent = parent->next; - } + collect_changed_submodules(&changed_submodules, &argv); + + for_each_string_list_item(name, &changed_submodules) { + struct oid_array *commits = name->util; + const struct submodule *submodule; + const char *path = NULL; + + submodule = submodule_from_name(&null_oid, name->string); + if (submodule) + path = submodule->path; + else + path = default_name_or_path(name->string); + + if (!path) + continue; + + if (!submodule_has_commits(path, commits)) + string_list_append(&changed_submodule_names, name->string); } + free_submodules_oids(&changed_submodules); argv_array_clear(&argv); - sha1_array_clear(&ref_tips_before_fetch); - sha1_array_clear(&ref_tips_after_fetch); + oid_array_clear(&ref_tips_before_fetch); + oid_array_clear(&ref_tips_after_fetch); initialized_fetch_ref_tips = 0; } -int fetch_populated_submodules(const struct argv_array *options, - const char *prefix, int command_line_option, - int quiet) +int submodule_touches_in_range(struct object_id *excl_oid, + struct object_id *incl_oid) { - int i, result = 0; - struct child_process cp = CHILD_PROCESS_INIT; - struct argv_array argv = ARGV_ARRAY_INIT; - struct string_list_item *name_for_path; - const char *work_tree = get_git_work_tree(); - if (!work_tree) - goto out; + struct string_list subs = STRING_LIST_INIT_DUP; + struct argv_array args = ARGV_ARRAY_INIT; + int ret; - if (read_cache() < 0) - die("index file corrupt"); + /* No need to check if there are no submodules configured */ + if (!submodule_from_path(NULL, NULL)) + return 0; - argv_array_push(&argv, "fetch"); - for (i = 0; i < options->argc; i++) - argv_array_push(&argv, options->argv[i]); - argv_array_push(&argv, "--recurse-submodules-default"); - /* default value, "--submodule-prefix" and its value are added later */ + argv_array_push(&args, "--"); /* args[0] program name */ + argv_array_push(&args, oid_to_hex(incl_oid)); + argv_array_push(&args, "--not"); + argv_array_push(&args, oid_to_hex(excl_oid)); - cp.env = local_repo_env; - cp.git_cmd = 1; - cp.no_stdin = 1; + collect_changed_submodules(&subs, &args); + ret = subs.nr; - calculate_changed_submodule_paths(); + argv_array_clear(&args); + + free_submodules_oids(&subs); + return ret; +} + +struct submodule_parallel_fetch { + int count; + struct argv_array args; + const char *work_tree; + const char *prefix; + int command_line_option; + int default_option; + int quiet; + int result; +}; +#define SPF_INIT {0, ARGV_ARRAY_INIT, NULL, NULL, 0, 0, 0, 0} + +static int get_fetch_recurse_config(const struct submodule *submodule, + struct submodule_parallel_fetch *spf) +{ + if (spf->command_line_option != RECURSE_SUBMODULES_DEFAULT) + return spf->command_line_option; + + if (submodule) { + char *key; + const char *value; + + int fetch_recurse = submodule->fetch_recurse; + key = xstrfmt("submodule.%s.fetchRecurseSubmodules", submodule->name); + if (!repo_config_get_string_const(the_repository, key, &value)) { + fetch_recurse = parse_fetch_recurse_submodules_arg(key, value); + } + free(key); + + if (fetch_recurse != RECURSE_SUBMODULES_NONE) + /* local config overrules everything except commandline */ + return fetch_recurse; + } + + return spf->default_option; +} + +static int get_next_submodule(struct child_process *cp, + struct strbuf *err, void *data, void **task_cb) +{ + int ret = 0; + struct submodule_parallel_fetch *spf = data; - for (i = 0; i < active_nr; i++) { + for (; spf->count < active_nr; spf->count++) { struct strbuf submodule_path = STRBUF_INIT; struct strbuf submodule_git_dir = STRBUF_INIT; struct strbuf submodule_prefix = STRBUF_INIT; - const struct cache_entry *ce = active_cache[i]; - const char *git_dir, *name, *default_argv; + const struct cache_entry *ce = active_cache[spf->count]; + const char *git_dir, *default_argv; + const struct submodule *submodule; + struct submodule default_submodule = SUBMODULE_INIT; if (!S_ISGITLINK(ce->ce_mode)) continue; - name = ce->name; - name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name); - if (name_for_path) - name = name_for_path->util; - - default_argv = "yes"; - if (command_line_option == RECURSE_SUBMODULES_DEFAULT) { - struct string_list_item *fetch_recurse_submodules_option; - fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name); - if (fetch_recurse_submodules_option) { - if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_OFF) - continue; - if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_ON_DEMAND) { - if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name)) - continue; - default_argv = "on-demand"; - } - } else { - if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) || - gitmodules_is_unmerged) - continue; - if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) { - if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name)) - continue; - default_argv = "on-demand"; - } + submodule = submodule_from_path(&null_oid, ce->name); + if (!submodule) { + const char *name = default_name_or_path(ce->name); + if (name) { + default_submodule.path = default_submodule.name = name; + submodule = &default_submodule; } - } else if (command_line_option == RECURSE_SUBMODULES_ON_DEMAND) { - if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name)) + } + + switch (get_fetch_recurse_config(submodule, spf)) + { + default: + case RECURSE_SUBMODULES_DEFAULT: + case RECURSE_SUBMODULES_ON_DEMAND: + if (!submodule || !unsorted_string_list_lookup(&changed_submodule_names, + submodule->name)) continue; default_argv = "on-demand"; + break; + case RECURSE_SUBMODULES_ON: + default_argv = "yes"; + break; + case RECURSE_SUBMODULES_OFF: + continue; } - strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name); + strbuf_addf(&submodule_path, "%s/%s", spf->work_tree, ce->name); strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf); - strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name); + strbuf_addf(&submodule_prefix, "%s%s/", spf->prefix, ce->name); git_dir = read_gitfile(submodule_git_dir.buf); if (!git_dir) git_dir = submodule_git_dir.buf; if (is_directory(git_dir)) { - if (!quiet) - printf("Fetching submodule %s%s\n", prefix, ce->name); - cp.dir = submodule_path.buf; - argv_array_push(&argv, default_argv); - argv_array_push(&argv, "--submodule-prefix"); - argv_array_push(&argv, submodule_prefix.buf); - cp.argv = argv.argv; - if (run_command(&cp)) - result = 1; - argv_array_pop(&argv); - argv_array_pop(&argv); - argv_array_pop(&argv); + child_process_init(cp); + cp->dir = strbuf_detach(&submodule_path, NULL); + prepare_submodule_repo_env(&cp->env_array); + cp->git_cmd = 1; + if (!spf->quiet) + strbuf_addf(err, "Fetching submodule %s%s\n", + spf->prefix, ce->name); + argv_array_init(&cp->args); + argv_array_pushv(&cp->args, spf->args.argv); + argv_array_push(&cp->args, default_argv); + argv_array_push(&cp->args, "--submodule-prefix"); + argv_array_push(&cp->args, submodule_prefix.buf); + ret = 1; } strbuf_release(&submodule_path); strbuf_release(&submodule_git_dir); strbuf_release(&submodule_prefix); + if (ret) { + spf->count++; + return 1; + } } - argv_array_clear(&argv); + return 0; +} + +static int fetch_start_failure(struct strbuf *err, + void *cb, void *task_cb) +{ + struct submodule_parallel_fetch *spf = cb; + + spf->result = 1; + + return 0; +} + +static int fetch_finish(int retvalue, struct strbuf *err, + void *cb, void *task_cb) +{ + struct submodule_parallel_fetch *spf = cb; + + if (retvalue) + spf->result = 1; + + return 0; +} + +int fetch_populated_submodules(const struct argv_array *options, + const char *prefix, int command_line_option, + int default_option, + int quiet, int max_parallel_jobs) +{ + int i; + struct submodule_parallel_fetch spf = SPF_INIT; + + spf.work_tree = get_git_work_tree(); + spf.command_line_option = command_line_option; + spf.default_option = default_option; + spf.quiet = quiet; + spf.prefix = prefix; + + if (!spf.work_tree) + goto out; + + if (read_cache() < 0) + die("index file corrupt"); + + argv_array_push(&spf.args, "fetch"); + for (i = 0; i < options->argc; i++) + argv_array_push(&spf.args, options->argv[i]); + argv_array_push(&spf.args, "--recurse-submodules-default"); + /* default value, "--submodule-prefix" and its value are added later */ + + calculate_changed_submodule_paths(); + run_processes_parallel(max_parallel_jobs, + get_next_submodule, + fetch_start_failure, + fetch_finish, + &spf); + + argv_array_clear(&spf.args); out: - string_list_clear(&changed_submodule_paths, 1); - return result; + string_list_clear(&changed_submodule_names, 1); + return spf.result; } unsigned is_submodule_modified(const char *path, int ignore_untracked) { - ssize_t len; struct child_process cp = CHILD_PROCESS_INIT; - const char *argv[] = { - "status", - "--porcelain", - NULL, - NULL, - }; struct strbuf buf = STRBUF_INIT; + FILE *fp; unsigned dirty_submodule = 0; - const char *line, *next_line; const char *git_dir; + int ignore_cp_exit_code = 0; strbuf_addf(&buf, "%s/.git", path); git_dir = read_gitfile(buf.buf); if (!git_dir) git_dir = buf.buf; - if (!is_directory(git_dir)) { + if (!is_git_directory(git_dir)) { + if (is_directory(git_dir)) + die(_("'%s' not recognized as a git repository"), git_dir); strbuf_release(&buf); /* The submodule is not checked out, so it is not modified */ return 0; - } strbuf_reset(&buf); + argv_array_pushl(&cp.args, "status", "--porcelain=2", NULL); if (ignore_untracked) - argv[2] = "-uno"; + argv_array_push(&cp.args, "-uno"); - cp.argv = argv; - cp.env = local_repo_env; + 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' in submodule %s", path); + die("Could not run 'git status --porcelain=2' in submodule %s", path); - len = strbuf_read(&buf, cp.out, 1024); - line = buf.buf; - while (len > 2) { - if ((line[0] == '?') && (line[1] == '?')) { + fp = xfdopen(cp.out, "r"); + while (strbuf_getwholeline(&buf, fp, '\n') != EOF) { + /* regular untracked files */ + if (buf.buf[0] == '?') dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED; - if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED) - break; - } else { - dirty_submodule |= DIRTY_SUBMODULE_MODIFIED; - if (ignore_untracked || - (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)) - break; + + if (buf.buf[0] == 'u' || + buf.buf[0] == '1' || + buf.buf[0] == '2') { + /* T = line type, XY = status, SSSS = submodule state */ + if (buf.len < strlen("T XY SSSS")) + die("BUG: invalid status --porcelain=2 line %s", + buf.buf); + + if (buf.buf[5] == 'S' && buf.buf[8] == 'U') + /* nested untracked file */ + dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED; + + if (buf.buf[0] == 'u' || + buf.buf[0] == '2' || + memcmp(buf.buf + 5, "S..U", 4)) + /* other change */ + dirty_submodule |= DIRTY_SUBMODULE_MODIFIED; } - next_line = strchr(line, '\n'); - if (!next_line) + + if ((dirty_submodule & DIRTY_SUBMODULE_MODIFIED) && + ((dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) || + ignore_untracked)) { + /* + * We're not interested in any further information from + * the child any more, neither output nor its exit code. + */ + ignore_cp_exit_code = 1; break; - next_line++; - len -= (next_line - line); - line = next_line; + } } - close(cp.out); + fclose(fp); - if (finish_command(&cp)) - die("'git status --porcelain' failed in submodule %s", path); + if (finish_command(&cp) && !ignore_cp_exit_code) + die("'git status --porcelain=2' failed in submodule %s", path); strbuf_release(&buf); return dirty_submodule; @@ -878,7 +1451,7 @@ int submodule_uses_gitfile(const char *path) /* Now test that all nested submodules use a gitfile too */ cp.argv = argv; - cp.env = local_repo_env; + prepare_submodule_repo_env(&cp.env_array); cp.git_cmd = 1; cp.no_stdin = 1; cp.no_stderr = 1; @@ -890,45 +1463,233 @@ 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; - cp.argv = argv; - cp.env = local_repo_env; + 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"); + + 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 const char *get_super_prefix_or_empty(void) +{ + const char *s = get_super_prefix(); + if (!s) + s = ""; + return s; +} + +static int submodule_has_dirty_index(const struct submodule *sub) +{ + struct child_process cp = CHILD_PROCESS_INIT; + + prepare_submodule_repo_env(&cp.env_array); + + cp.git_cmd = 1; + argv_array_pushl(&cp.args, "diff-index", "--quiet", + "--cached", "HEAD", NULL); + cp.no_stdin = 1; + cp.no_stdout = 1; + cp.dir = sub->path; + if (start_command(&cp)) + die("could not recurse into submodule '%s'", sub->path); + + return finish_command(&cp); +} + +static void submodule_reset_index(const char *path) +{ + struct child_process cp = CHILD_PROCESS_INIT; + prepare_submodule_repo_env(&cp.env_array); + + cp.git_cmd = 1; + cp.no_stdin = 1; + cp.dir = path; + + argv_array_pushf(&cp.args, "--super-prefix=%s%s/", + get_super_prefix_or_empty(), path); + argv_array_pushl(&cp.args, "read-tree", "-u", "--reset", NULL); + + argv_array_push(&cp.args, EMPTY_TREE_SHA1_HEX); + + if (run_command(&cp)) + die("could not reset submodule index"); +} + +/** + * Moves a submodule at a given path from a given head to another new head. + * For edge cases (a submodule coming into existence or removing a submodule) + * pass NULL for old or new respectively. + */ +int submodule_move_head(const char *path, + const char *old, + const char *new, + unsigned flags) +{ + int ret = 0; + struct child_process cp = CHILD_PROCESS_INIT; + const struct submodule *sub; + int *error_code_ptr, error_code; + + if (!is_submodule_active(the_repository, path)) + return 0; + + if (flags & SUBMODULE_MOVE_HEAD_FORCE) + /* + * Pass non NULL pointer to is_submodule_populated_gently + * to prevent die()-ing. We'll use connect_work_tree_and_git_dir + * to fixup the submodule in the force case later. + */ + error_code_ptr = &error_code; + else + error_code_ptr = NULL; + + if (old && !is_submodule_populated_gently(path, error_code_ptr)) + return 0; + + sub = submodule_from_path(&null_oid, path); + + if (!sub) + die("BUG: could not get submodule information for '%s'", path); + + if (old && !(flags & SUBMODULE_MOVE_HEAD_FORCE)) { + /* Check if the submodule has a dirty index. */ + if (submodule_has_dirty_index(sub)) + return error(_("submodule '%s' has dirty index"), path); + } + + if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) { + if (old) { + if (!submodule_uses_gitfile(path)) + absorb_git_dir_into_superproject("", path, + ABSORB_GITDIR_RECURSE_SUBMODULES); + } else { + char *gitdir = xstrfmt("%s/modules/%s", + get_git_common_dir(), sub->name); + connect_work_tree_and_git_dir(path, gitdir); + free(gitdir); + + /* make sure the index is clean as well */ + submodule_reset_index(path); + } + + if (old && (flags & SUBMODULE_MOVE_HEAD_FORCE)) { + char *gitdir = xstrfmt("%s/modules/%s", + get_git_common_dir(), sub->name); + connect_work_tree_and_git_dir(path, gitdir); + free(gitdir); + } + } + + prepare_submodule_repo_env(&cp.env_array); + + cp.git_cmd = 1; + cp.no_stdin = 1; + cp.dir = path; + + argv_array_pushf(&cp.args, "--super-prefix=%s%s/", + get_super_prefix_or_empty(), path); + argv_array_pushl(&cp.args, "read-tree", "--recurse-submodules", NULL); + + if (flags & SUBMODULE_MOVE_HEAD_DRY_RUN) + argv_array_push(&cp.args, "-n"); + else + argv_array_push(&cp.args, "-u"); + + if (flags & SUBMODULE_MOVE_HEAD_FORCE) + argv_array_push(&cp.args, "--reset"); + else + argv_array_push(&cp.args, "-m"); + + argv_array_push(&cp.args, old ? old : EMPTY_TREE_SHA1_HEX); + argv_array_push(&cp.args, new ? new : EMPTY_TREE_SHA1_HEX); + + if (run_command(&cp)) { + ret = -1; + goto out; + } + + if (!(flags & SUBMODULE_MOVE_HEAD_DRY_RUN)) { + if (new) { + child_process_init(&cp); + /* also set the HEAD accordingly */ + cp.git_cmd = 1; + cp.no_stdin = 1; + cp.dir = path; + + prepare_submodule_repo_env(&cp.env_array); + argv_array_pushl(&cp.args, "update-ref", "HEAD", + "--no-deref", new, NULL); + + if (run_command(&cp)) { + ret = -1; + goto out; + } + } else { + struct strbuf sb = STRBUF_INIT; + + strbuf_addf(&sb, "%s/.git", path); + unlink_or_warn(sb.buf); + strbuf_release(&sb); + + if (is_empty_dir(path)) + rmdir_or_warn(path); + } + } +out: + return ret; } static int find_first_merges(struct object_array *result, const char *path, @@ -949,10 +1710,12 @@ static int find_first_merges(struct object_array *result, const char *path, memset(&rev_opts, 0, sizeof(rev_opts)); /* get all revisions that merge commit a */ - snprintf(merged_revision, sizeof(merged_revision), "^%s", - sha1_to_hex(a->object.sha1)); + xsnprintf(merged_revision, sizeof(merged_revision), "^%s", + oid_to_hex(&a->object.oid)); init_revisions(&revs, NULL); rev_opts.submodule = path; + /* FIXME: can't handle linked worktrees in submodules yet */ + revs.single_worktree = path != NULL; setup_revisions(ARRAY_SIZE(rev_args)-1, rev_args, &revs, &rev_opts); /* save all revisions from the above list that contain b */ @@ -985,7 +1748,7 @@ static int find_first_merges(struct object_array *result, const char *path, add_object_array(merges.objects[i].item, NULL, result); } - free(merges.objects); + object_array_clear(&merges); return result->nr; } @@ -1002,9 +1765,9 @@ static void print_commit(struct commit *commit) #define MERGE_WARNING(path, msg) \ warning("Failed to merge submodule %s (%s)", path, msg); -int merge_submodule(unsigned char result[20], const char *path, - const unsigned char base[20], const unsigned char a[20], - const unsigned char b[20], int search) +int merge_submodule(struct object_id *result, const char *path, + const struct object_id *base, const struct object_id *a, + const struct object_id *b, int search) { struct commit *commit_base, *commit_a, *commit_b; int parent_count; @@ -1013,14 +1776,14 @@ int merge_submodule(unsigned char result[20], const char *path, int i; /* store a in result in case we fail */ - hashcpy(result, a); + oidcpy(result, a); /* we can not handle deletion conflicts */ - if (is_null_sha1(base)) + if (is_null_oid(base)) return 0; - if (is_null_sha1(a)) + if (is_null_oid(a)) return 0; - if (is_null_sha1(b)) + if (is_null_oid(b)) return 0; if (add_submodule_odb(path)) { @@ -1044,11 +1807,11 @@ int merge_submodule(unsigned char result[20], const char *path, /* Case #1: a is contained in b or vice versa */ if (in_merge_bases(commit_a, commit_b)) { - hashcpy(result, b); + oidcpy(result, b); return 1; } if (in_merge_bases(commit_b, commit_a)) { - hashcpy(result, a); + oidcpy(result, a); return 1; } @@ -1081,7 +1844,7 @@ int merge_submodule(unsigned char result[20], const char *path, "by using:\n\n" " git update-index --cacheinfo 160000 %s \"%s\"\n\n" "which will accept this suggestion.\n", - sha1_to_hex(merges.objects[0].item->sha1), path); + oid_to_hex(&merges.objects[0].item->oid), path); break; default: @@ -1090,32 +1853,243 @@ int merge_submodule(unsigned char result[20], const char *path, print_commit((struct commit *) merges.objects[i].item); } - free(merges.objects); + object_array_clear(&merges); 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) +/* + * 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_oid, 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); + + fprintf(stderr, _("Migrating git directory of '%s%s' from\n'%s' to\n'%s'\n"), + get_super_prefix_or_empty(), 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) { + 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_oid, path); + if (!sub) + die(_("could not lookup name for submodule '%s'"), path); + connect_work_tree_and_git_dir(path, + git_path("modules/%s", sub->name)); + } 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?"); + + strbuf_addstr(&sb, get_super_prefix_or_empty()); + 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); + } +} + +const char *get_superproject_working_tree(void) +{ + struct child_process cp = CHILD_PROCESS_INIT; + struct strbuf sb = STRBUF_INIT; + const char *one_up = real_path_if_valid("../"); + const char *cwd = xgetcwd(); + const char *ret = NULL; + const char *subpath; + int code; + ssize_t len; + + if (!is_inside_work_tree()) + /* + * FIXME: + * We might have a superproject, but it is harder + * to determine. + */ + return NULL; + + if (!one_up) + return NULL; + + subpath = relative_path(cwd, one_up, &sb); + + prepare_submodule_repo_env(&cp.env_array); + argv_array_pop(&cp.env_array); + + argv_array_pushl(&cp.args, "--literal-pathspecs", "-C", "..", + "ls-files", "-z", "--stage", "--full-name", "--", + subpath, NULL); + strbuf_reset(&sb); + + cp.no_stdin = 1; + cp.no_stderr = 1; + cp.out = -1; + cp.git_cmd = 1; + + if (start_command(&cp)) + die(_("could not start ls-files in ..")); + + len = strbuf_read(&sb, cp.out, PATH_MAX); + close(cp.out); + + if (starts_with(sb.buf, "160000")) { + int super_sub_len; + int cwd_len = strlen(cwd); + char *super_sub, *super_wt; + + /* + * There is a superproject having this repo as a submodule. + * The format is <mode> SP <hash> SP <stage> TAB <full name> \0, + * We're only interested in the name after the tab. + */ + super_sub = strchr(sb.buf, '\t') + 1; + super_sub_len = sb.buf + sb.len - super_sub - 1; + + if (super_sub_len > cwd_len || + strcmp(&cwd[cwd_len - super_sub_len], super_sub)) + die (_("BUG: returned path string doesn't match cwd?")); + + super_wt = xstrdup(cwd); + super_wt[cwd_len - super_sub_len] = '\0'; + + ret = real_path(super_wt); + free(super_wt); + } + strbuf_release(&sb); + + code = finish_command(&cp); + + if (code == 128) + /* '../' is not a git repository */ + return NULL; + if (code == 0 && len == 0) + /* There is an unrelated git repository at '../' */ + return NULL; + if (code) + die(_("ls-tree returned unexpected return code %d"), code); + + return ret; +} + +/* + * Put the gitdir for a submodule (given relative to the main + * repository worktree) into `buf`, or return -1 on error. + */ +int submodule_to_gitdir(struct strbuf *buf, const char *submodule) { - struct strbuf file_name = STRBUF_INIT; - struct strbuf rel_path = STRBUF_INIT; - const char *real_work_tree = xstrdup(real_path(work_tree)); + const struct submodule *sub; + const char *git_dir; + int ret = 0; - /* Update gitfile */ - strbuf_addf(&file_name, "%s/.git", work_tree); - write_file(file_name.buf, 1, "gitdir: %s\n", - relative_path(git_dir, real_work_tree, &rel_path)); + strbuf_reset(buf); + strbuf_addstr(buf, submodule); + strbuf_complete(buf, '/'); + strbuf_addstr(buf, ".git"); - /* Update core.worktree setting */ - strbuf_reset(&file_name); - strbuf_addf(&file_name, "%s/config", git_dir); - if (git_config_set_in_file(file_name.buf, "core.worktree", - relative_path(real_work_tree, git_dir, - &rel_path))) - die(_("Could not set core.worktree in %s"), - file_name.buf); + git_dir = read_gitfile(buf->buf); + if (git_dir) { + strbuf_reset(buf); + strbuf_addstr(buf, git_dir); + } + if (!is_git_directory(buf->buf)) { + sub = submodule_from_path(&null_oid, submodule); + if (!sub) { + ret = -1; + goto cleanup; + } + strbuf_reset(buf); + strbuf_git_path(buf, "%s/%s", "modules", sub->name); + } - strbuf_release(&file_name); - strbuf_release(&rel_path); - free((void *)real_work_tree); +cleanup: + return ret; } |