Sync with Git 2.20.1
[gitweb.git] / submodule.c
index a2b266fbfae2cd89b00a11008fbcd28bf09777e2..6415cc55807c7ed9ee4cbcaa57f41a5804b6e854 100644 (file)
@@ -22,6 +22,7 @@
 #include "worktree.h"
 #include "parse-options.h"
 #include "object-store.h"
+#include "commit-reach.h"
 
 static int config_update_recurse_submodules = RECURSE_SUBMODULES_OFF;
 static struct string_list changed_submodule_names = STRING_LIST_INIT_DUP;
@@ -50,6 +51,24 @@ int is_gitmodules_unmerged(const struct index_state *istate)
        return 0;
 }
 
+/*
+ * Check if the .gitmodules file is safe to write.
+ *
+ * Writing to the .gitmodules file requires that the file exists in the
+ * working tree or, if it doesn't, that a brand new .gitmodules file is going
+ * to be created (i.e. it's neither in the index nor in the current branch).
+ *
+ * It is not safe to write to .gitmodules if it's not in the working tree but
+ * it is in the index or in the current branch, because writing new values
+ * (and staging them) would blindly overwrite ALL the old content.
+ */
+int is_writing_gitmodules_ok(void)
+{
+       struct object_id oid;
+       return file_exists(GITMODULES_FILE) ||
+               (get_oid(GITMODULES_INDEX, &oid) < 0 && get_oid(GITMODULES_HEAD, &oid) < 0);
+}
+
 /*
  * Check if the .gitmodules file has unstaged modifications.  This must be
  * checked before allowing modifications to the .gitmodules file with the
@@ -65,8 +84,7 @@ int is_staging_gitmodules_ok(struct index_state *istate)
        if ((pos >= 0) && (pos < istate->cache_nr)) {
                struct stat st;
                if (lstat(GITMODULES_FILE, &st) == 0 &&
-                   ie_match_stat(istate, istate->cache[pos], &st,
-                                 CE_MATCH_IGNORE_FSMONITOR) & DATA_CHANGED)
+                   ie_match_stat(istate, istate->cache[pos], &st, 0) & DATA_CHANGED)
                        return 0;
        }
 
@@ -89,6 +107,7 @@ int update_path_in_gitmodules(const char *oldpath, const char *newpath)
 {
        struct strbuf entry = STRBUF_INIT;
        const struct submodule *submodule;
+       int ret;
 
        if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
                return -1;
@@ -104,14 +123,9 @@ int update_path_in_gitmodules(const char *oldpath, const char *newpath)
        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;
-       }
+       ret = config_set_in_gitmodules_file_gently(entry.buf, newpath);
        strbuf_release(&entry);
-       return 0;
+       return ret;
 }
 
 /*
@@ -428,7 +442,7 @@ static int prepare_submodule_summary(struct rev_info *rev, const char *path,
 {
        struct commit_list *list;
 
-       init_revisions(rev, NULL);
+       repo_init_revisions(the_repository, rev, NULL);
        setup_revisions(0, NULL, rev, NULL);
        rev->left_right = 1;
        rev->first_parent_only = 1;
@@ -536,7 +550,7 @@ static void show_submodule_header(struct diff_options *o, const char *path,
                        fast_backward = 1;
        }
 
-       if (!oidcmp(one, two)) {
+       if (oideq(one, two)) {
                strbuf_release(&sb);
                return;
        }
@@ -694,6 +708,7 @@ static struct oid_array *submodule_commits(struct string_list *submodules,
 }
 
 struct collect_changed_submodules_cb_data {
+       struct repository *repo;
        struct string_list *changed;
        const struct object_id *commit_oid;
 };
@@ -733,7 +748,7 @@ static void collect_changed_submodules_cb(struct diff_queue_struct *q,
                if (!S_ISGITLINK(p->two->mode))
                        continue;
 
-               submodule = submodule_from_path(the_repository,
+               submodule = submodule_from_path(me->repo,
                                                commit_oid, p->two->path);
                if (submodule)
                        name = submodule->name;
@@ -741,7 +756,7 @@ static void collect_changed_submodules_cb(struct diff_queue_struct *q,
                        name = default_name_or_path(p->two->path);
                        /* make sure name does not collide with existing one */
                        if (name)
-                               submodule = submodule_from_name(the_repository,
+                               submodule = submodule_from_name(me->repo,
                                                                commit_oid, name);
                        if (submodule) {
                                warning("Submodule in commit %s at path: "
@@ -766,13 +781,14 @@ static void collect_changed_submodules_cb(struct diff_queue_struct *q,
  * 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,
+static void collect_changed_submodules(struct repository *r,
+                                      struct string_list *changed,
                                       struct argv_array *argv)
 {
        struct rev_info rev;
        const struct commit *commit;
 
-       init_revisions(&rev, NULL);
+       repo_init_revisions(r, &rev, NULL);
        setup_revisions(argv->argc, argv->argv, &rev, NULL);
        if (prepare_revision_walk(&rev))
                die("revision walk setup failed");
@@ -780,10 +796,11 @@ static void collect_changed_submodules(struct string_list *changed,
        while ((commit = get_revision(&rev))) {
                struct rev_info diff_rev;
                struct collect_changed_submodules_cb_data data;
+               data.repo = r;
                data.changed = changed;
                data.commit_oid = &commit->object.oid;
 
-               init_revisions(&diff_rev, NULL);
+               repo_init_revisions(r, &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;
@@ -815,6 +832,7 @@ static int append_oid_to_argv(const struct object_id *oid, void *data)
 }
 
 struct has_commit_data {
+       struct repository *repo;
        int result;
        const char *path;
 };
@@ -823,7 +841,7 @@ static int check_has_commit(const struct object_id *oid, void *data)
 {
        struct has_commit_data *cb = data;
 
-       enum object_type type = oid_object_info(the_repository, oid, NULL);
+       enum object_type type = oid_object_info(cb->repo, oid, NULL);
 
        switch (type) {
        case OBJ_COMMIT:
@@ -841,9 +859,11 @@ static int check_has_commit(const struct object_id *oid, void *data)
        }
 }
 
-static int submodule_has_commits(const char *path, struct oid_array *commits)
+static int submodule_has_commits(struct repository *r,
+                                const char *path,
+                                struct oid_array *commits)
 {
-       struct has_commit_data has_commit = { 1, path };
+       struct has_commit_data has_commit = { r, 1, path };
 
        /*
         * Perform a cheap, but incorrect check for the existence of 'commits'.
@@ -886,9 +906,11 @@ static int submodule_has_commits(const char *path, struct oid_array *commits)
        return has_commit.result;
 }
 
-static int submodule_needs_pushing(const char *path, struct oid_array *commits)
+static int submodule_needs_pushing(struct repository *r,
+                                  const char *path,
+                                  struct oid_array *commits)
 {
-       if (!submodule_has_commits(path, commits))
+       if (!submodule_has_commits(r, path, commits))
                /*
                 * NOTE: We do consider it safe to return "no" here. The
                 * correct answer would be "We do not know" instead of
@@ -930,8 +952,10 @@ static int submodule_needs_pushing(const char *path, struct oid_array *commits)
        return 0;
 }
 
-int find_unpushed_submodules(struct oid_array *commits,
-               const char *remotes_name, struct string_list *needs_pushing)
+int find_unpushed_submodules(struct repository *r,
+                            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 *name;
@@ -943,14 +967,14 @@ int find_unpushed_submodules(struct oid_array *commits,
        argv_array_push(&argv, "--not");
        argv_array_pushf(&argv, "--remotes=%s", remotes_name);
 
-       collect_changed_submodules(&submodules, &argv);
+       collect_changed_submodules(r, &submodules, &argv);
 
        for_each_string_list_item(name, &submodules) {
                struct oid_array *commits = name->util;
                const struct submodule *submodule;
                const char *path = NULL;
 
-               submodule = submodule_from_name(the_repository, &null_oid, name->string);
+               submodule = submodule_from_name(r, &null_oid, name->string);
                if (submodule)
                        path = submodule->path;
                else
@@ -959,7 +983,7 @@ int find_unpushed_submodules(struct oid_array *commits,
                if (!path)
                        continue;
 
-               if (submodule_needs_pushing(path, commits))
+               if (submodule_needs_pushing(r, path, commits))
                        string_list_insert(needs_pushing, path);
        }
 
@@ -1044,7 +1068,8 @@ static void submodule_push_check(const char *path, const char *head,
                die("process for submodule '%s' failed", path);
 }
 
-int push_unpushed_submodules(struct oid_array *commits,
+int push_unpushed_submodules(struct repository *r,
+                            struct oid_array *commits,
                             const struct remote *remote,
                             const struct refspec *rs,
                             const struct string_list *push_options,
@@ -1053,7 +1078,8 @@ int push_unpushed_submodules(struct oid_array *commits,
        int i, ret = 1;
        struct string_list needs_pushing = STRING_LIST_INIT_DUP;
 
-       if (!find_unpushed_submodules(commits, remote->name, &needs_pushing))
+       if (!find_unpushed_submodules(r, commits,
+                                     remote->name, &needs_pushing))
                return 1;
 
        /*
@@ -1110,14 +1136,14 @@ void check_for_new_submodule_commits(struct object_id *oid)
        oid_array_append(&ref_tips_after_fetch, oid);
 }
 
-static void calculate_changed_submodule_paths(void)
+static void calculate_changed_submodule_paths(struct repository *r)
 {
        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 (!submodule_from_path(the_repository, NULL, NULL))
+       if (!submodule_from_path(r, NULL, NULL))
                return;
 
        argv_array_push(&argv, "--"); /* argv[0] program name */
@@ -1131,14 +1157,14 @@ static void calculate_changed_submodule_paths(void)
         * Collect all submodules (whether checked out or not) for which new
         * commits have been recorded upstream in "changed_submodule_names".
         */
-       collect_changed_submodules(&changed_submodules, &argv);
+       collect_changed_submodules(r, &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(the_repository, &null_oid, name->string);
+               submodule = submodule_from_name(r, &null_oid, name->string);
                if (submodule)
                        path = submodule->path;
                else
@@ -1147,7 +1173,7 @@ static void calculate_changed_submodule_paths(void)
                if (!path)
                        continue;
 
-               if (!submodule_has_commits(path, commits))
+               if (!submodule_has_commits(r, path, commits))
                        string_list_append(&changed_submodule_names, name->string);
        }
 
@@ -1158,7 +1184,8 @@ static void calculate_changed_submodule_paths(void)
        initialized_fetch_ref_tips = 0;
 }
 
-int submodule_touches_in_range(struct object_id *excl_oid,
+int submodule_touches_in_range(struct repository *r,
+                              struct object_id *excl_oid,
                               struct object_id *incl_oid)
 {
        struct string_list subs = STRING_LIST_INIT_DUP;
@@ -1166,7 +1193,7 @@ int submodule_touches_in_range(struct object_id *excl_oid,
        int ret;
 
        /* No need to check if there are no submodules configured */
-       if (!submodule_from_path(the_repository, NULL, NULL))
+       if (!submodule_from_path(r, NULL, NULL))
                return 0;
 
        argv_array_push(&args, "--"); /* args[0] program name */
@@ -1176,7 +1203,7 @@ int submodule_touches_in_range(struct object_id *excl_oid,
                argv_array_push(&args, oid_to_hex(excl_oid));
        }
 
-       collect_changed_submodules(&subs, &args);
+       collect_changed_submodules(r, &subs, &args);
        ret = subs.nr;
 
        argv_array_clear(&args);
@@ -1346,7 +1373,7 @@ int fetch_populated_submodules(struct repository *r,
        argv_array_push(&spf.args, "--recurse-submodules-default");
        /* default value, "--submodule-prefix" and its value are added later */
 
-       calculate_changed_submodule_paths();
+       calculate_changed_submodule_paths(r);
        run_processes_parallel(max_parallel_jobs,
                               get_next_submodule,
                               fetch_start_failure,
@@ -1880,7 +1907,7 @@ const char *get_superproject_working_tree(void)
                 * 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;
+               super_sub_len = strlen(super_sub);
 
                if (super_sub_len > cwd_len ||
                    strcmp(&cwd[cwd_len - super_sub_len], super_sub))