#include "cache.h"
+#include "repository.h"
+#include "config.h"
+#include "submodule-config.h"
#include "submodule.h"
#include "dir.h"
#include "diff.h"
#include "commit.h"
#include "revision.h"
#include "run-command.h"
+#include "diffcore.h"
+#include "refs.h"
+#include "string-list.h"
+#include "sha1-array.h"
+#include "argv-array.h"
+#include "blob.h"
+#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_paths = STRING_LIST_INIT_DUP;
+static int initialized_fetch_ref_tips;
+static struct oid_array ref_tips_before_fetch;
+static struct oid_array ref_tips_after_fetch;
+
+/*
+ * 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.
+ */
+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;
+}
+
+/*
+ * 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.
+ */
+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, 0) & DATA_CHANGED)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int for_each_remote_ref_submodule(const char *submodule,
+ each_ref_fn fn, void *cb_data)
+{
+ return refs_for_each_remote_ref(get_submodule_ref_store(submodule),
+ fn, cb_data);
+}
+
+/*
+ * Try to update the "path" entry in the "submodule.<name>" section of the
+ * .gitmodules file. Return 0 only if a .gitmodules file was found, a section
+ * with the correct path=<oldpath> setting was found and we could update it.
+ */
+int update_path_in_gitmodules(const char *oldpath, const char *newpath)
+{
+ struct strbuf entry = STRBUF_INIT;
+ const struct submodule *submodule;
+
+ if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
+ return -1;
+
+ if (is_gitmodules_unmerged(&the_index))
+ die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
+
+ 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, submodule->name);
+ strbuf_addstr(&entry, ".path");
+ 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);
+ return -1;
+ }
+ strbuf_release(&entry);
+ return 0;
+}
+
+/*
+ * Try to remove the "submodule.<name>" section from .gitmodules where the given
+ * path is configured. Return 0 only if a .gitmodules file was found, a section
+ * with the correct path=<path> setting was found and we could remove it.
+ */
+int remove_path_from_gitmodules(const char *path)
+{
+ struct strbuf sect = STRBUF_INIT;
+ const struct submodule *submodule;
+
+ if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
+ return -1;
+
+ if (is_gitmodules_unmerged(&the_index))
+ die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
+
+ 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(§, 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(§);
+ return -1;
+ }
+ strbuf_release(§);
+ return 0;
+}
+
+void stage_updated_gitmodules(void)
+{
+ 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;
- strbuf_addf(&objects_directory, "%s/.git/objects/", path);
+ 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;
- prepare_alt_odb();
+ add_to_alternates_memory(objects_directory.buf);
done:
strbuf_release(&objects_directory);
return ret;
}
-void show_submodule_summary(FILE *f, const char *path,
- unsigned char one[20], unsigned char two[20],
+void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
+ const char *path)
+{
+ 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))
+ DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
+ }
+}
+
+/* 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 (!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;
+}
+
+/*
+ * 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);
+ }
+
+ 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 is_submodule_populated_gently(const char *path, int *return_error_code)
+{
+ int ret = 0;
+ char *gitdir = xstrfmt("%s/.git", path);
+
+ if (resolve_gitdir_gently(gitdir, return_error_code))
+ ret = 1;
+
+ free(gitdir);
+ return ret;
+}
+
+/*
+ * 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 (!prefix)
+ return;
+
+ prefixlen = strlen(prefix);
+
+ 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);
+
+ if (!strcmp(arg, "all"))
+ DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
+ else if (!strcmp(arg, "untracked"))
+ DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
+ else if (!strcmp(arg, "dirty"))
+ DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
+ 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,
+ struct commit_list *merge_bases)
+{
+ struct commit_list *list;
+
+ init_revisions(rev, NULL);
+ setup_revisions(0, NULL, rev, NULL);
+ rev->left_right = 1;
+ rev->first_parent_only = 1;
+ left->object.flags |= SYMMETRIC_LEFT;
+ add_pending_object(rev, &left->object, path);
+ add_pending_object(rev, &right->object, path);
+ for (list = merge_bases; list; list = list->next) {
+ list->item->object.flags |= UNINTERESTING;
+ add_pending_object(rev, &list->item->object,
+ oid_to_hex(&list->item->object.oid));
+ }
+ return prepare_revision_walk(rev);
+}
+
+static void print_submodule_summary(struct rev_info *rev, struct diff_options *o)
+{
+ static const char format[] = " %m %s";
+ struct strbuf sb = STRBUF_INIT;
+ struct commit *commit;
+
+ while ((commit = get_revision(rev))) {
+ struct pretty_print_context ctx = {0};
+ ctx.date_mode = rev->date_mode;
+ ctx.output_encoding = get_log_output_encoding();
+ strbuf_setlen(&sb, 0);
+ format_commit_message(commit, format, &sb, &ctx);
+ strbuf_addch(&sb, '\n');
+ if (commit->object.flags & SYMMETRIC_LEFT)
+ diff_emit_submodule_del(o, sb.buf);
+ else
+ diff_emit_submodule_add(o, sb.buf);
+ }
+ strbuf_release(&sb);
+}
+
+static void prepare_submodule_repo_env_no_git_dir(struct argv_array *out)
+{
+ const char * const *var;
+
+ for (var = local_repo_env; *var; var++) {
+ if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
+ argv_array_push(out, *var);
+ }
+}
+
+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,
- const char *del, const char *add, const char *reset)
+ struct commit **left, struct commit **right,
+ struct commit_list **merge_bases)
{
- struct rev_info rev;
- struct commit *commit, *left = left, *right = right;
- struct commit_list *merge_bases, *list;
const char *message = NULL;
struct strbuf sb = STRBUF_INIT;
- static const char *format = " %m %s";
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)";
- if (!message) {
- init_revisions(&rev, NULL);
- setup_revisions(0, NULL, &rev, NULL);
- rev.left_right = 1;
- rev.first_parent_only = 1;
- 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, 1);
- 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));
- }
- if (prepare_revision_walk(&rev))
- message = "(revision walker failed)";
- }
-
- strbuf_addf(&sb, "Submodule %s %s..", 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));
- if (dirty_submodule)
- strbuf_add(&sb, "-dirty", 6);
+ *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 (!oidcmp(one, two)) {
+ strbuf_release(&sb);
+ return;
+ }
+
+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\n", message);
else
strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
- fwrite(sb.buf, sb.len, 1, f);
-
- if (!message) {
- while ((commit = get_revision(&rev))) {
- struct pretty_print_context ctx = {0};
- ctx.date_mode = rev.date_mode;
- strbuf_setlen(&sb, 0);
- 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);
- }
- clear_commit_marks(left, ~0);
- clear_commit_marks(right, ~0);
- }
+ diff_emit_submodule_header(o, sb.buf);
+
strbuf_release(&sb);
}
-int is_submodule_modified(const char *path)
+void show_submodule_summary(struct diff_options *o, const char *path,
+ struct object_id *one, struct object_id *two,
+ unsigned dirty_submodule)
{
- int len;
- struct child_process cp;
- const char *argv[] = {
- "status",
- "--porcelain",
- NULL,
- };
- char *env[4];
- struct strbuf buf = STRBUF_INIT;
+ struct rev_info rev;
+ struct commit *left = NULL, *right = NULL;
+ struct commit_list *merge_bases = NULL;
- strbuf_addf(&buf, "%s/.git/", path);
- if (!is_directory(buf.buf)) {
- strbuf_release(&buf);
- /* The submodule is not checked out, so it is not modified */
- return 0;
+ 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;
}
- strbuf_reset(&buf);
- strbuf_addf(&buf, "GIT_WORK_TREE=%s", path);
- env[0] = strbuf_detach(&buf, NULL);
- strbuf_addf(&buf, "GIT_DIR=%s/.git", path);
- env[1] = strbuf_detach(&buf, NULL);
- strbuf_addf(&buf, "GIT_INDEX_FILE");
- env[2] = strbuf_detach(&buf, NULL);
- env[3] = NULL;
+ 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 = &empty_tree_oid, *new = &empty_tree_oid;
+ 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;
- memset(&cp, 0, sizeof(cp));
- cp.argv = argv;
- cp.env = (const char *const *)env;
cp.git_cmd = 1;
- cp.no_stdin = 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 (DIFF_OPT_TST(o, 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))
- die("Could not run git status --porcelain");
+ diff_emit_submodule_error(o, "(diff failed)\n");
- len = strbuf_read(&buf, cp.out, 1024);
- close(cp.out);
+ while (strbuf_getwholeline_fd(&sb, cp.out, '\n') != EOF)
+ diff_emit_submodule_pipethrough(o, sb.buf, sb.len);
if (finish_command(&cp))
- die("git status --porcelain failed");
+ diff_emit_submodule_error(o, "(diff failed)\n");
- free(env[0]);
- free(env[1]);
- free(env[2]);
- strbuf_release(&buf);
- return len != 0;
+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);
+}
+
+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 *path)
+{
+ struct string_list_item *item;
+
+ item = string_list_insert(submodules, path);
+ 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;
+}
+
+static void collect_changed_submodules_cb(struct diff_queue_struct *q,
+ struct diff_options *options,
+ void *data)
+{
+ int i;
+ struct string_list *changed = data;
+
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ struct oid_array *commits;
+ 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.
+ */
+ commits = submodule_commits(changed, p->two->path);
+ oid_array_append(commits, &p->two->oid);
+ } 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;
+ }
+ }
+}
+
+/*
+ * 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)
+{
+ 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;
+
+ 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 = changed;
+ 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,
+ int flags, void *cb_data)
+{
+ return 1;
+}
+
+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 (!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;
+ struct strbuf buf = STRBUF_INIT;
+ int needs_pushing = 0;
+
+ 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 <commits> --not --remotes -n 1' command in submodule %s",
+ path);
+ if (strbuf_read(&buf, cp.out, 41))
+ needs_pushing = 1;
+ finish_command(&cp);
+ close(cp.out);
+ strbuf_release(&buf);
+ return needs_pushing;
+ }
+
+ return 0;
+}
+
+int find_unpushed_submodules(struct oid_array *commits,
+ const char *remotes_name, struct string_list *needs_pushing)
+{
+ struct string_list submodules = STRING_LIST_INIT_DUP;
+ struct string_list_item *submodule;
+ struct argv_array argv = ARGV_ARRAY_INIT;
+
+ /* 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);
+
+ collect_changed_submodules(&submodules, &argv);
+
+ for_each_string_list_item(submodule, &submodules) {
+ struct oid_array *commits = submodule->util;
+ const char *path = submodule->string;
+
+ if (submodule_needs_pushing(path, commits))
+ string_list_insert(needs_pushing, path);
+ }
+
+ free_submodules_oids(&submodules);
+ argv_array_clear(&argv);
+
+ return needs_pushing->nr;
+}
+
+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;
+ 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]);
+ }
+
+ prepare_submodule_repo_env(&cp.env_array);
+ cp.git_cmd = 1;
+ cp.no_stdin = 1;
+ cp.dir = path;
+ if (run_command(&cp))
+ return 0;
+ close(cp.out);
+ }
+
+ return 1;
+}
+
+/*
+ * 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(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.hash, 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, remote, refspec, refspec_nr,
+ push_options, dry_run)) {
+ fprintf(stderr, "Unable to push submodule '%s'\n", path);
+ ret = 0;
+ }
+ }
+
+ string_list_clear(&needs_pushing, 0);
+
+ return ret;
+}
+
+static int append_oid_to_array(const char *ref, const struct object_id *oid,
+ int flags, void *data)
+{
+ struct oid_array *array = data;
+ oid_array_append(array, oid);
+ return 0;
+}
+
+void check_for_new_submodule_commits(struct object_id *oid)
+{
+ if (!initialized_fetch_ref_tips) {
+ for_each_ref(append_oid_to_array, &ref_tips_before_fetch);
+ initialized_fetch_ref_tips = 1;
+ }
+
+ oid_array_append(&ref_tips_after_fetch, oid);
+}
+
+static void calculate_changed_submodule_paths(void)
+{
+ struct argv_array argv = ARGV_ARRAY_INIT;
+ struct string_list changed_submodules = STRING_LIST_INIT_DUP;
+ const struct string_list_item *item;
+
+ /* No need to check if there are no submodules configured */
+ if (!submodule_from_path(NULL, NULL))
+ return;
+
+ argv_array_push(&argv, "--"); /* argv[0] program name */
+ oid_array_for_each_unique(&ref_tips_after_fetch,
+ append_oid_to_argv, &argv);
+ argv_array_push(&argv, "--not");
+ 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".
+ */
+ collect_changed_submodules(&changed_submodules, &argv);
+
+ for_each_string_list_item(item, &changed_submodules) {
+ struct oid_array *commits = item->util;
+ const char *path = item->string;
+
+ if (!submodule_has_commits(path, commits))
+ string_list_append(&changed_submodule_paths, path);
+ }
+
+ free_submodules_oids(&changed_submodules);
+ argv_array_clear(&argv);
+ oid_array_clear(&ref_tips_before_fetch);
+ oid_array_clear(&ref_tips_after_fetch);
+ initialized_fetch_ref_tips = 0;
+}
+
+int submodule_touches_in_range(struct object_id *excl_oid,
+ struct object_id *incl_oid)
+{
+ struct string_list subs = STRING_LIST_INIT_DUP;
+ struct argv_array args = ARGV_ARRAY_INIT;
+ int ret;
+
+ /* No need to check if there are no submodules configured */
+ if (!submodule_from_path(NULL, NULL))
+ return 0;
+
+ 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));
+
+ collect_changed_submodules(&subs, &args);
+ ret = subs.nr;
+
+ 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_next_submodule(struct child_process *cp,
+ struct strbuf *err, void *data, void **task_cb)
+{
+ int ret = 0;
+ struct submodule_parallel_fetch *spf = data;
+
+ 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[spf->count];
+ const char *git_dir, *default_argv;
+ const struct submodule *submodule;
+
+ if (!S_ISGITLINK(ce->ce_mode))
+ continue;
+
+ submodule = submodule_from_path(&null_oid, ce->name);
+
+ default_argv = "yes";
+ if (spf->command_line_option == RECURSE_SUBMODULES_DEFAULT) {
+ int fetch_recurse = RECURSE_SUBMODULES_NONE;
+
+ if (submodule) {
+ char *key;
+ const char *value;
+
+ 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) {
+ if (fetch_recurse == RECURSE_SUBMODULES_OFF)
+ continue;
+ if (fetch_recurse == RECURSE_SUBMODULES_ON_DEMAND) {
+ if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
+ continue;
+ default_argv = "on-demand";
+ }
+ } else {
+ if (spf->default_option == RECURSE_SUBMODULES_OFF)
+ continue;
+ if (spf->default_option == RECURSE_SUBMODULES_ON_DEMAND) {
+ if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
+ continue;
+ default_argv = "on-demand";
+ }
+ }
+ } else if (spf->command_line_option == RECURSE_SUBMODULES_ON_DEMAND) {
+ if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
+ continue;
+ default_argv = "on-demand";
+ }
+
+ 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/", 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)) {
+ 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;
+ }
+ }
+ 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 spf.result;
+}
+
+unsigned is_submodule_modified(const char *path, int ignore_untracked)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+ struct strbuf buf = STRBUF_INIT;
+ FILE *fp;
+ unsigned dirty_submodule = 0;
+ 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_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_array_push(&cp.args, "-uno");
+
+ 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=2' in submodule %s", path);
+
+ 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 (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;
+ }
+
+ 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;
+ }
+ }
+ fclose(fp);
+
+ if (finish_command(&cp) && !ignore_cp_exit_code)
+ die("'git status --porcelain=2' failed in submodule %s", path);
+
+ strbuf_release(&buf);
+ return dirty_submodule;
+}
+
+int submodule_uses_gitfile(const char *path)
+{
+ struct child_process cp = CHILD_PROCESS_INIT;
+ const char *argv[] = {
+ "submodule",
+ "foreach",
+ "--quiet",
+ "--recursive",
+ "test -f .git",
+ NULL,
+ };
+ struct strbuf buf = STRBUF_INIT;
+ const char *git_dir;
+
+ strbuf_addf(&buf, "%s/.git", path);
+ git_dir = read_gitfile(buf.buf);
+ if (!git_dir) {
+ strbuf_release(&buf);
+ return 0;
+ }
+ strbuf_release(&buf);
+
+ /* Now test that all nested submodules use a gitfile too */
+ cp.argv = argv;
+ prepare_submodule_repo_env(&cp.env_array);
+ cp.git_cmd = 1;
+ cp.no_stdin = 1;
+ cp.no_stderr = 1;
+ cp.no_stdout = 1;
+ cp.dir = path;
+ if (run_command(&cp))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * 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;
+ struct strbuf buf = STRBUF_INIT;
+ int ret = 0;
+
+ if (!file_exists(path) || is_empty_dir(path))
+ return 0;
+
+ if (!submodule_uses_gitfile(path))
+ 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");
+
+ 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)) {
+ 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)
+ ret = 1;
+ close(cp.out);
+
+ 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 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", 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,
+ struct commit *a, struct commit *b)
+{
+ int i, j;
+ struct object_array merges = OBJECT_ARRAY_INIT;
+ struct commit *commit;
+ int contains_another;
+
+ char merged_revision[42];
+ const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path",
+ "--all", merged_revision, NULL };
+ struct rev_info revs;
+ struct setup_revision_opt rev_opts;
+
+ memset(result, 0, sizeof(struct object_array));
+ memset(&rev_opts, 0, sizeof(rev_opts));
+
+ /* get all revisions that merge commit a */
+ 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 */
+ if (prepare_revision_walk(&revs))
+ die("revision walk setup failed");
+ while ((commit = get_revision(&revs)) != NULL) {
+ struct object *o = &(commit->object);
+ if (in_merge_bases(b, commit))
+ add_object_array(o, NULL, &merges);
+ }
+ reset_revision_walk();
+
+ /* Now we've got all merges that contain a and b. Prune all
+ * merges that contain another found merge and save them in
+ * result.
+ */
+ for (i = 0; i < merges.nr; i++) {
+ struct commit *m1 = (struct commit *) merges.objects[i].item;
+
+ contains_another = 0;
+ for (j = 0; j < merges.nr; j++) {
+ struct commit *m2 = (struct commit *) merges.objects[j].item;
+ if (i != j && in_merge_bases(m2, m1)) {
+ contains_another = 1;
+ break;
+ }
+ }
+
+ if (!contains_another)
+ add_object_array(merges.objects[i].item, NULL, result);
+ }
+
+ object_array_clear(&merges);
+ return result->nr;
+}
+
+static void print_commit(struct commit *commit)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct pretty_print_context ctx = {0};
+ ctx.date_mode.type = DATE_NORMAL;
+ format_commit_message(commit, " %h: %m %s", &sb, &ctx);
+ fprintf(stderr, "%s\n", sb.buf);
+ strbuf_release(&sb);
+}
+
+#define MERGE_WARNING(path, msg) \
+ warning("Failed to merge submodule %s (%s)", path, msg);
+
+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;
+ struct object_array merges;
+
+ int i;
+
+ /* store a in result in case we fail */
+ oidcpy(result, a);
+
+ /* we can not handle deletion conflicts */
+ if (is_null_oid(base))
+ return 0;
+ if (is_null_oid(a))
+ return 0;
+ if (is_null_oid(b))
+ return 0;
+
+ if (add_submodule_odb(path)) {
+ MERGE_WARNING(path, "not checked out");
+ return 0;
+ }
+
+ if (!(commit_base = lookup_commit_reference(base)) ||
+ !(commit_a = lookup_commit_reference(a)) ||
+ !(commit_b = lookup_commit_reference(b))) {
+ MERGE_WARNING(path, "commits not present");
+ return 0;
+ }
+
+ /* check whether both changes are forward */
+ if (!in_merge_bases(commit_base, commit_a) ||
+ !in_merge_bases(commit_base, commit_b)) {
+ MERGE_WARNING(path, "commits don't follow merge-base");
+ return 0;
+ }
+
+ /* Case #1: a is contained in b or vice versa */
+ if (in_merge_bases(commit_a, commit_b)) {
+ oidcpy(result, b);
+ return 1;
+ }
+ if (in_merge_bases(commit_b, commit_a)) {
+ oidcpy(result, a);
+ return 1;
+ }
+
+ /*
+ * Case #2: There are one or more merges that contain a and b in
+ * the submodule. If there is only one, then present it as a
+ * suggestion to the user, but leave it marked unmerged so the
+ * user needs to confirm the resolution.
+ */
+
+ /* Skip the search if makes no sense to the calling context. */
+ if (!search)
+ return 0;
+
+ /* find commit which merges them */
+ parent_count = find_first_merges(&merges, path, commit_a, commit_b);
+ switch (parent_count) {
+ case 0:
+ MERGE_WARNING(path, "merge following commits not found");
+ break;
+
+ case 1:
+ MERGE_WARNING(path, "not fast-forward");
+ fprintf(stderr, "Found a possible merge resolution "
+ "for the submodule:\n");
+ print_commit((struct commit *) merges.objects[0].item);
+ fprintf(stderr,
+ "If this is correct simply add it to the index "
+ "for example\n"
+ "by using:\n\n"
+ " git update-index --cacheinfo 160000 %s \"%s\"\n\n"
+ "which will accept this suggestion.\n",
+ oid_to_hex(&merges.objects[0].item->oid), path);
+ break;
+
+ default:
+ MERGE_WARNING(path, "multiple merges found");
+ for (i = 0; i < merges.nr; i++)
+ print_commit((struct commit *) merges.objects[i].item);
+ }
+
+ object_array_clear(&merges);
+ return 0;
+}
+
+/*
+ * 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)
+{
+ const struct submodule *sub;
+ const char *git_dir;
+ int ret = 0;
+
+ strbuf_reset(buf);
+ strbuf_addstr(buf, submodule);
+ strbuf_complete(buf, '/');
+ strbuf_addstr(buf, ".git");
+
+ 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);
+ }
+
+cleanup:
+ return ret;
}