]> git.ipfire.org Git - thirdparty/git.git/blobdiff - submodule.c
submodule: improve submodule_has_commits()
[thirdparty/git.git] / submodule.c
index c52d6634c528d79ddedf069b7e09e955d283ed64..057695e645342bedef3195f14e33a7a708baae69 100644 (file)
 #include "blob.h"
 #include "thread-utils.h"
 #include "quote.h"
+#include "remote.h"
 #include "worktree.h"
 
 static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND;
 static int config_update_recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
 static int parallel_jobs = 1;
-static struct string_list changed_submodule_paths = STRING_LIST_INIT_NODUP;
+static struct string_list changed_submodule_paths = 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
@@ -576,6 +577,7 @@ void show_submodule_inline_diff(FILE *f, const char *path,
        if (!(dirty_submodule & DIRTY_SUBMODULE_MODIFIED))
                argv_array_push(&cp.args, oid_to_hex(new));
 
+       prepare_submodule_repo_env(&cp.env_array);
        if (run_command(&cp))
                fprintf(f, "(diff failed)\n");
 
@@ -621,35 +623,69 @@ static int has_remote(const char *refname, const struct object_id *oid,
        return 1;
 }
 
-static int append_sha1_to_argv(const unsigned char sha1[20], void *data)
+static int append_oid_to_argv(const struct object_id *oid, void *data)
 {
        struct argv_array *argv = data;
-       argv_array_push(argv, sha1_to_hex(sha1));
+       argv_array_push(argv, oid_to_hex(oid));
        return 0;
 }
 
-static int check_has_commit(const unsigned char sha1[20], void *data)
+static int check_has_commit(const struct object_id *oid, void *data)
 {
        int *has_commit = data;
 
-       if (!lookup_commit_reference(sha1))
+       if (!lookup_commit_reference(oid->hash))
                *has_commit = 0;
 
        return 0;
 }
 
-static int submodule_has_commits(const char *path, struct sha1_array *commits)
+static int submodule_has_commits(const char *path, struct oid_array *commits)
 {
        int has_commit = 1;
 
+       /*
+        * Perform a cheap, but incorrect check for the existance 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 existance.  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;
 
-       sha1_array_for_each_unique(commits, check_has_commit, &has_commit);
+       oid_array_for_each_unique(commits, check_has_commit, &has_commit);
+
+       if (has_commit) {
+               /*
+                * 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 = 0;
+
+               strbuf_release(&out);
+       }
+
        return has_commit;
 }
 
-static int submodule_needs_pushing(const char *path, struct sha1_array *commits)
+static int submodule_needs_pushing(const char *path, struct oid_array *commits)
 {
        if (!submodule_has_commits(path, commits))
                /*
@@ -671,7 +707,7 @@ static int submodule_needs_pushing(const char *path, struct sha1_array *commits)
                int needs_pushing = 0;
 
                argv_array_push(&cp.args, "rev-list");
-               sha1_array_for_each_unique(commits, append_sha1_to_argv, &cp.args);
+               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);
@@ -693,18 +729,18 @@ static int submodule_needs_pushing(const char *path, struct sha1_array *commits)
        return 0;
 }
 
-static struct sha1_array *submodule_commits(struct string_list *submodules,
+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 sha1_array *) item->util;
+               return (struct oid_array *) item->util;
 
-       /* NEEDSWORK: should we have sha1_array_init()? */
-       item->util = xcalloc(1, sizeof(struct sha1_array));
-       return (struct sha1_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_submodules_from_diff(struct diff_queue_struct *q,
@@ -716,11 +752,11 @@ static void collect_submodules_from_diff(struct diff_queue_struct *q,
 
        for (i = 0; i < q->nr; i++) {
                struct diff_filepair *p = q->queue[i];
-               struct sha1_array *commits;
+               struct oid_array *commits;
                if (!S_ISGITLINK(p->two->mode))
                        continue;
                commits = submodule_commits(submodules, p->two->path);
-               sha1_array_append(commits, p->two->oid.hash);
+               oid_array_append(commits, &p->two->oid);
        }
 }
 
@@ -736,15 +772,15 @@ static void find_unpushed_submodule_commits(struct commit *commit,
        diff_tree_combined_merge(commit, 1, &rev);
 }
 
-static void free_submodules_sha1s(struct string_list *submodules)
+static void free_submodules_oids(struct string_list *submodules)
 {
        struct string_list_item *item;
        for_each_string_list_item(item, submodules)
-               sha1_array_clear((struct sha1_array *) item->util);
+               oid_array_clear((struct oid_array *) item->util);
        string_list_clear(submodules, 1);
 }
 
-int find_unpushed_submodules(struct sha1_array *commits,
+int find_unpushed_submodules(struct oid_array *commits,
                const char *remotes_name, struct string_list *needs_pushing)
 {
        struct rev_info rev;
@@ -757,7 +793,7 @@ int find_unpushed_submodules(struct sha1_array *commits,
 
        /* argv.argv[0] will be ignored by setup_revisions */
        argv_array_push(&argv, "find_unpushed_submodules");
-       sha1_array_for_each_unique(commits, append_sha1_to_argv, &argv);
+       oid_array_for_each_unique(commits, append_oid_to_argv, &argv);
        argv_array_push(&argv, "--not");
        argv_array_pushf(&argv, "--remotes=%s", remotes_name);
 
@@ -772,17 +808,22 @@ int find_unpushed_submodules(struct sha1_array *commits,
        argv_array_clear(&argv);
 
        for_each_string_list_item(submodule, &submodules) {
-               struct sha1_array *commits = (struct sha1_array *) submodule->util;
+               struct oid_array *commits = (struct oid_array *) submodule->util;
 
                if (submodule_needs_pushing(submodule->string, commits))
                        string_list_insert(needs_pushing, submodule->string);
        }
-       free_submodules_sha1s(&submodules);
+
+       free_submodules_oids(&submodules);
 
        return needs_pushing->nr;
 }
 
-static int push_submodule(const char *path, int dry_run)
+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;
@@ -793,6 +834,20 @@ static int push_submodule(const char *path, int dry_run)
                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;
@@ -805,20 +860,67 @@ static int push_submodule(const char *path, int dry_run)
        return 1;
 }
 
-int push_unpushed_submodules(struct sha1_array *commits,
-                            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 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, 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, 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)
+               for (i = 0; i < needs_pushing.nr; i++)
+                       submodule_push_check(needs_pushing.items[i].string,
+                                            remote, refspec, refspec_nr);
+
+       /* 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, dry_run)) {
+               if (!push_submodule(path, remote, refspec, refspec_nr,
+                                   push_options, dry_run)) {
                        fprintf(stderr, "Unable to push submodule '%s'\n", path);
                        ret = 0;
                }
@@ -871,7 +973,7 @@ static void submodule_collect_changed_cb(struct diff_queue_struct *q,
                        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->oid.hash))
-                               string_list_append(&changed_submodule_paths, xstrdup(p->two->path));
+                               string_list_append(&changed_submodule_paths, p->two->path);
                } else {
                        /* Submodule is new or was moved here */
                        /* NEEDSWORK: When the .git directories of submodules
@@ -884,27 +986,22 @@ static void submodule_collect_changed_cb(struct diff_queue_struct *q,
        }
 }
 
-static int add_sha1_to_array(const char *ref, const struct object_id *oid,
-                            int flags, void *data)
+static int append_oid_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 int add_sha1_to_argv(const unsigned char sha1[20], void *data)
-{
-       argv_array_push(data, sha1_to_hex(sha1));
-       return 0;
+       oid_array_append(&ref_tips_after_fetch, oid);
 }
 
 static void calculate_changed_submodule_paths(void)
@@ -919,11 +1016,11 @@ static void calculate_changed_submodule_paths(void)
 
        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);
+       oid_array_for_each_unique(&ref_tips_before_fetch,
+                                  append_oid_to_argv, &argv);
        setup_revisions(argv.argc, argv.argv, &rev, NULL);
        if (prepare_revision_walk(&rev))
                die("revision walk setup failed");
@@ -949,8 +1046,8 @@ static void calculate_changed_submodule_paths(void)
        }
 
        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;
 }
 
@@ -1111,67 +1208,78 @@ out:
 
 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;
        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;
@@ -1251,7 +1359,7 @@ int bad_to_remove_submodule(const char *path, unsigned flags)
        cp.dir = path;
        if (start_command(&cp)) {
                if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
-                       die(_("could not start 'git status in submodule '%s'"),
+                       die(_("could not start 'git status' in submodule '%s'"),
                                path);
                ret = -1;
                goto out;
@@ -1264,7 +1372,7 @@ int bad_to_remove_submodule(const char *path, unsigned flags)
 
        if (finish_command(&cp)) {
                if (flags & SUBMODULE_REMOVAL_DIE_ON_ERROR)
-                       die(_("could not run 'git status in submodule '%s'"),
+                       die(_("could not run 'git status' in submodule '%s'"),
                                path);
                ret = -1;
        }
@@ -1396,8 +1504,7 @@ int submodule_move_head(const char *path,
                        cp1.no_stdin = 1;
                        cp1.dir = path;
 
-                       argv_array_pushl(&cp1.args, "update-ref", "HEAD",
-                                        new ? new : EMPTY_TREE_SHA1_HEX, NULL);
+                       argv_array_pushl(&cp1.args, "update-ref", "HEAD", new, NULL);
 
                        if (run_command(&cp1)) {
                                ret = -1;
@@ -1436,7 +1543,7 @@ 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",
+       xsnprintf(merged_revision, sizeof(merged_revision), "^%s",
                        oid_to_hex(&a->object.oid));
        init_revisions(&revs, NULL);
        rev_opts.submodule = path;
@@ -1788,3 +1895,34 @@ const char *get_superproject_working_tree(void)
 
        return ret;
 }
+
+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)) {
+               gitmodules_config();
+               sub = submodule_from_path(null_sha1, submodule);
+               if (!sub) {
+                       ret = -1;
+                       goto cleanup;
+               }
+               strbuf_reset(buf);
+               strbuf_git_path(buf, "%s/%s", "modules", sub->name);
+       }
+
+cleanup:
+       return ret;
+}