#include "diff.h"
#include "commit.h"
#include "revision.h"
+#include "run-command.h"
+#include "diffcore.h"
+#include "refs.h"
+#include "string-list.h"
-int add_submodule_odb(const char *path)
+struct string_list config_name_for_path;
+struct string_list config_fetch_recurse_submodules_for_name;
+struct string_list config_ignore_for_name;
+static int config_fetch_recurse_submodules;
+
+static int add_submodule_odb(const char *path)
{
struct strbuf objects_directory = STRBUF_INIT;
struct alternate_object_database *alt_odb;
+ int ret = 0;
+ const char *git_dir;
- strbuf_addf(&objects_directory, "%s/.git/objects/", path);
- if (!is_directory(objects_directory.buf))
- return -1;
-
+ strbuf_addf(&objects_directory, "%s/.git", path);
+ git_dir = read_gitfile_gently(objects_directory.buf);
+ if (git_dir) {
+ strbuf_reset(&objects_directory);
+ strbuf_addstr(&objects_directory, git_dir);
+ }
+ strbuf_addstr(&objects_directory, "/objects/");
+ 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))
- return 0;
+ goto done;
alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
alt_odb->next = alt_odb_list;
alt_odb->name[41] = '\0';
alt_odb_list = alt_odb;
prepare_alt_odb();
+done:
+ strbuf_release(&objects_directory);
+ return ret;
+}
+
+void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
+ const char *path)
+{
+ struct string_list_item *path_option, *ignore_option;
+ path_option = unsorted_string_list_lookup(&config_name_for_path, path);
+ if (path_option) {
+ ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util);
+ if (ignore_option)
+ handle_ignore_submodules_arg(diffopt, ignore_option->util);
+ }
+}
+
+int submodule_config(const char *var, const char *value, void *cb)
+{
+ if (!prefixcmp(var, "submodule."))
+ return parse_submodule_config_option(var, value);
+ else if (!strcmp(var, "fetch.recursesubmodules")) {
+ config_fetch_recurse_submodules = git_config_bool(var, value);
+ return 0;
+ }
+ return 0;
+}
+
+void gitmodules_config(void)
+{
+ const char *work_tree = get_git_work_tree();
+ if (work_tree) {
+ struct strbuf gitmodules_path = STRBUF_INIT;
+ strbuf_addstr(&gitmodules_path, work_tree);
+ strbuf_addstr(&gitmodules_path, "/.gitmodules");
+ git_config_from_file(submodule_config, gitmodules_path.buf, NULL);
+ strbuf_release(&gitmodules_path);
+ }
+}
+
+int parse_submodule_config_option(const char *var, const char *value)
+{
+ int len;
+ struct string_list_item *config;
+ struct strbuf submodname = STRBUF_INIT;
+
+ var += 10; /* Skip "submodule." */
+
+ len = strlen(var);
+ if ((len > 5) && !strcmp(var + len - 5, ".path")) {
+ strbuf_add(&submodname, var, len - 5);
+ config = unsorted_string_list_lookup(&config_name_for_path, value);
+ if (config)
+ free(config->util);
+ else
+ config = string_list_append(&config_name_for_path, xstrdup(value));
+ config->util = strbuf_detach(&submodname, NULL);
+ strbuf_release(&submodname);
+ } else if ((len > 23) && !strcmp(var + len - 23, ".fetchrecursesubmodules")) {
+ strbuf_add(&submodname, var, len - 23);
+ config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, submodname.buf);
+ if (!config)
+ config = string_list_append(&config_fetch_recurse_submodules_for_name,
+ strbuf_detach(&submodname, NULL));
+ config->util = git_config_bool(var, value) ? (void *)1 : NULL;
+ strbuf_release(&submodname);
+ } else if ((len > 7) && !strcmp(var + len - 7, ".ignore")) {
+ if (strcmp(value, "untracked") && strcmp(value, "dirty") &&
+ strcmp(value, "all") && strcmp(value, "none")) {
+ warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var);
+ return 0;
+ }
+
+ strbuf_add(&submodname, var, len - 7);
+ config = unsorted_string_list_lookup(&config_ignore_for_name, submodname.buf);
+ if (config)
+ free(config->util);
+ else
+ config = string_list_append(&config_ignore_for_name,
+ strbuf_detach(&submodname, NULL));
+ strbuf_release(&submodname);
+ config->util = xstrdup(value);
+ return 0;
+ }
return 0;
}
+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);
+}
+
void show_submodule_summary(FILE *f, const char *path,
unsigned char one[20], unsigned char two[20],
+ unsigned dirty_submodule,
const char *del, const char *add, const char *reset)
{
struct rev_info rev;
message = "(revision walker failed)";
}
+ if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
+ fprintf(f, "Submodule %s contains untracked content\n", path);
+ if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
+ fprintf(f, "Submodule %s contains modified content\n", path);
+
+ if (!hashcmp(one, two)) {
+ strbuf_release(&sb);
+ return;
+ }
+
strbuf_addf(&sb, "Submodule %s %s..", path,
find_unique_abbrev(one, DEFAULT_ABBREV));
if (!fast_backward && !fast_forward)
}
strbuf_release(&sb);
}
+
+void set_config_fetch_recurse_submodules(int value)
+{
+ config_fetch_recurse_submodules = value;
+}
+
+int fetch_populated_submodules(int num_options, const char **options,
+ const char *prefix, int ignore_config,
+ int quiet)
+{
+ int i, result = 0, argc = 0;
+ struct child_process cp;
+ const char **argv;
+ struct string_list_item *name_for_path;
+ const char *work_tree = get_git_work_tree();
+ if (!work_tree)
+ return 0;
+
+ if (!the_index.initialized)
+ if (read_cache() < 0)
+ die("index file corrupt");
+
+ /* 4: "fetch" (options) "--submodule-prefix" prefix NULL */
+ argv = xcalloc(num_options + 4, sizeof(const char *));
+ argv[argc++] = "fetch";
+ for (i = 0; i < num_options; i++)
+ argv[argc++] = options[i];
+ argv[argc++] = "--submodule-prefix";
+
+ memset(&cp, 0, sizeof(cp));
+ cp.argv = argv;
+ cp.env = local_repo_env;
+ cp.git_cmd = 1;
+ cp.no_stdin = 1;
+
+ for (i = 0; i < active_nr; i++) {
+ struct strbuf submodule_path = STRBUF_INIT;
+ struct strbuf submodule_git_dir = STRBUF_INIT;
+ struct strbuf submodule_prefix = STRBUF_INIT;
+ struct cache_entry *ce = active_cache[i];
+ const char *git_dir, *name;
+
+ if (!S_ISGITLINK(ce->ce_mode))
+ continue;
+
+ name = ce->name;
+ name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
+ if (name_for_path)
+ name = name_for_path->util;
+
+ if (!ignore_config) {
+ struct string_list_item *fetch_recurse_submodules_option;
+ fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
+ if (fetch_recurse_submodules_option) {
+ if (!fetch_recurse_submodules_option->util)
+ continue;
+ } else {
+ if (!config_fetch_recurse_submodules)
+ continue;
+ }
+ }
+
+ strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
+ strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
+ strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name);
+ git_dir = read_gitfile_gently(submodule_git_dir.buf);
+ if (!git_dir)
+ git_dir = submodule_git_dir.buf;
+ if (is_directory(git_dir)) {
+ if (!quiet)
+ printf("Fetching submodule %s%s\n", prefix, ce->name);
+ cp.dir = submodule_path.buf;
+ argv[argc] = submodule_prefix.buf;
+ if (run_command(&cp))
+ result = 1;
+ }
+ strbuf_release(&submodule_path);
+ strbuf_release(&submodule_git_dir);
+ strbuf_release(&submodule_prefix);
+ }
+ free(argv);
+ return result;
+}
+
+unsigned is_submodule_modified(const char *path, int ignore_untracked)
+{
+ ssize_t len;
+ struct child_process cp;
+ const char *argv[] = {
+ "status",
+ "--porcelain",
+ NULL,
+ NULL,
+ };
+ struct strbuf buf = STRBUF_INIT;
+ unsigned dirty_submodule = 0;
+ const char *line, *next_line;
+ const char *git_dir;
+
+ strbuf_addf(&buf, "%s/.git", path);
+ git_dir = read_gitfile_gently(buf.buf);
+ if (!git_dir)
+ git_dir = buf.buf;
+ if (!is_directory(git_dir)) {
+ strbuf_release(&buf);
+ /* The submodule is not checked out, so it is not modified */
+ return 0;
+
+ }
+ strbuf_reset(&buf);
+
+ if (ignore_untracked)
+ argv[2] = "-uno";
+
+ memset(&cp, 0, sizeof(cp));
+ cp.argv = argv;
+ cp.env = local_repo_env;
+ 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");
+
+ len = strbuf_read(&buf, cp.out, 1024);
+ line = buf.buf;
+ while (len > 2) {
+ if ((line[0] == '?') && (line[1] == '?')) {
+ 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;
+ }
+ next_line = strchr(line, '\n');
+ if (!next_line)
+ break;
+ next_line++;
+ len -= (next_line - line);
+ line = next_line;
+ }
+ close(cp.out);
+
+ if (finish_command(&cp))
+ die("git status --porcelain failed");
+
+ strbuf_release(&buf);
+ return dirty_submodule;
+}
+
+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;
+ 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(&merges, 0, sizeof(merges));
+ memset(result, 0, sizeof(struct object_array));
+ memset(&rev_opts, 0, sizeof(rev_opts));
+
+ /* get all revisions that merge commit a */
+ snprintf(merged_revision, sizeof(merged_revision), "^%s",
+ sha1_to_hex(a->object.sha1));
+ init_revisions(&revs, NULL);
+ rev_opts.submodule = path;
+ setup_revisions(sizeof(rev_args)/sizeof(char *)-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, 1))
+ add_object_array(o, NULL, &merges);
+ }
+
+ /* 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, 1)) {
+ contains_another = 1;
+ break;
+ }
+ }
+
+ if (!contains_another)
+ add_object_array(merges.objects[i].item,
+ merges.objects[i].name, result);
+ }
+
+ free(merges.objects);
+ return result->nr;
+}
+
+static void print_commit(struct commit *commit)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct pretty_print_context ctx = {0};
+ ctx.date_mode = 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(unsigned char result[20], const char *path,
+ const unsigned char base[20], const unsigned char a[20],
+ const unsigned char b[20])
+{
+ 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 */
+ hashcpy(result, a);
+
+ /* we can not handle deletion conflicts */
+ if (is_null_sha1(base))
+ return 0;
+ if (is_null_sha1(a))
+ return 0;
+ if (is_null_sha1(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, 1) ||
+ !in_merge_bases(commit_base, &commit_b, 1)) {
+ 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, 1)) {
+ hashcpy(result, b);
+ return 1;
+ }
+ if (in_merge_bases(commit_b, &commit_a, 1)) {
+ hashcpy(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.
+ */
+
+ /* 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",
+ sha1_to_hex(merges.objects[0].item->sha1), path);
+ break;
+
+ default:
+ MERGE_WARNING(path, "multiple merges found");
+ for (i = 0; i < merges.nr; i++)
+ print_commit((struct commit *) merges.objects[i].item);
+ }
+
+ free(merges.objects);
+ return 0;
+}