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Merge branch 'bc/hash-algo'
[git-core/git.git] / submodule.c
index 63e7094..fa25888 100644 (file)
@@ -21,7 +21,7 @@
 #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 struct string_list changed_submodule_names = 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;
@@ -62,7 +62,7 @@ int is_staging_gitmodules_ok(const struct index_state *istate)
        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)
+                   ce_match_stat(istate->cache[pos], &st, CE_MATCH_IGNORE_FSMONITOR) & DATA_CHANGED)
                        return 0;
        }
 
@@ -183,7 +183,7 @@ void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
                if (ignore)
                        handle_ignore_submodules_arg(diffopt, ignore);
                else if (is_gitmodules_unmerged(&the_index))
-                       DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
+                       diffopt->flags.ignore_submodules = 1;
        }
 }
 
@@ -402,16 +402,16 @@ const char *submodule_strategy_to_string(const struct submodule_update_strategy
 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);
 }
@@ -587,7 +587,7 @@ 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;
+       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;
@@ -616,7 +616,7 @@ void show_submodule_inline_diff(struct diff_options *o, const char *path,
        argv_array_pushf(&cp.args, "--color=%s", want_color(o->use_color) ?
                         "always" : "never");
 
-       if (DIFF_OPT_TST(o, REVERSE_DIFF)) {
+       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/",
@@ -674,11 +674,11 @@ const struct submodule *submodule_from_ce(const struct cache_entry *ce)
 }
 
 static struct oid_array *submodule_commits(struct string_list *submodules,
-                                          const char *path)
+                                          const char *name)
 {
        struct string_list_item *item;
 
-       item = string_list_insert(submodules, path);
+       item = string_list_insert(submodules, name);
        if (item->util)
                return (struct oid_array *) item->util;
 
@@ -687,39 +687,67 @@ static struct oid_array *submodule_commits(struct string_list *submodules,
        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;
-       struct string_list *changed = data;
 
        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;
 
-               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;
+               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);
        }
 }
 
@@ -742,11 +770,14 @@ 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.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 = changed;
+               diff_rev.diffopt.format_callback_data = &data;
                diff_tree_combined_merge(commit, 1, &diff_rev);
        }
 
@@ -894,7 +925,7 @@ 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 string_list_item *name;
        struct argv_array argv = ARGV_ARRAY_INIT;
 
        /* argv.argv[0] will be ignored by setup_revisions */
@@ -905,9 +936,19 @@ int find_unpushed_submodules(struct oid_array *commits,
 
        collect_changed_submodules(&submodules, &argv);
 
-       for_each_string_list_item(submodule, &submodules) {
-               struct oid_array *commits = submodule->util;
-               const char *path = submodule->string;
+       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(&null_oid, name->string);
+               if (submodule)
+                       path = submodule->path;
+               else
+                       path = default_name_or_path(name->string);
+
+               if (!path)
+                       continue;
 
                if (submodule_needs_pushing(path, commits))
                        string_list_insert(needs_pushing, path);
@@ -1016,7 +1057,7 @@ int push_unpushed_submodules(struct oid_array *commits,
                char *head;
                struct object_id head_oid;
 
-               head = resolve_refdup("HEAD", 0, head_oid.hash, NULL);
+               head = resolve_refdup("HEAD", 0, &head_oid, NULL);
                if (!head)
                        die(_("Failed to resolve HEAD as a valid ref."));
 
@@ -1065,7 +1106,7 @@ 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;
+       const struct string_list_item *name;
 
        /* No need to check if there are no submodules configured */
        if (!submodule_from_path(NULL, NULL))
@@ -1080,16 +1121,26 @@ 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_paths".
+        * commits have been recorded upstream in "changed_submodule_names".
         */
        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;
+       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_paths, path);
+                       string_list_append(&changed_submodule_names, name->string);
        }
 
        free_submodules_oids(&changed_submodules);
@@ -1136,6 +1187,31 @@ struct submodule_parallel_fetch {
 };
 #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)
 {
@@ -1149,49 +1225,35 @@ static int get_next_submodule(struct child_process *cp,
                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;
 
                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 (!submodule) {
+                       const char *name = default_name_or_path(ce->name);
+                       if (name) {
+                               default_submodule.path = default_submodule.name = name;
+                               submodule = &default_submodule;
                        }
+               }
 
-                       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))
+               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", spf->work_tree, ce->name);
@@ -1282,7 +1344,7 @@ int fetch_populated_submodules(const struct argv_array *options,
 
        argv_array_clear(&spf.args);
 out:
-       string_list_clear(&changed_submodule_paths, 1);
+       string_list_clear(&changed_submodule_names, 1);
        return spf.result;
 }
 
@@ -1608,7 +1670,8 @@ int submodule_move_head(const char *path,
                        cp.dir = path;
 
                        prepare_submodule_repo_env(&cp.env_array);
-                       argv_array_pushl(&cp.args, "update-ref", "HEAD", new, NULL);
+                       argv_array_pushl(&cp.args, "update-ref", "HEAD",
+                                        "--no-deref", new, NULL);
 
                        if (run_command(&cp)) {
                                ret = -1;