walken command

Makefile

@@ -1175,6 +1175,7 @@ BUILTIN_OBJS += builtin/var.o
 BUILTIN_OBJS += builtin/verify-commit.o
 BUILTIN_OBJS += builtin/verify-pack.o
 BUILTIN_OBJS += builtin/verify-tag.o
+BUILTIN_OBJS += builtin/walken.o
 BUILTIN_OBJS += builtin/worktree.o
 BUILTIN_OBJS += builtin/write-tree.o
 

builtin.h

@@ -237,6 +237,7 @@ int cmd_var(int argc, const char **argv, const char *prefix);
 int cmd_verify_commit(int argc, const char **argv, const char *prefix);
 int cmd_verify_tag(int argc, const char **argv, const char *prefix);
 int cmd_version(int argc, const char **argv, const char *prefix);
+int cmd_walken(int argc, const char **argv, const char *prefix);
 int cmd_whatchanged(int argc, const char **argv, const char *prefix);
 int cmd_worktree(int argc, const char **argv, const char *prefix);
 int cmd_write_tree(int argc, const char **argv, const char *prefix);

builtin/walken.c

@@ -0,0 +1,158 @@
+/*
+ * "git walken"
+ *
+ * Part of the "My First Object Walk" tutorial.
+ */
+#include "builtin.h"
+#include "parse-options.h"
+#include "config.h"
+#include "revision.h"
+#include "list-objects.h"
+#include "list-objects-filter-options.h"
+
+static int commit_count;
+static int tag_count;
+static int blob_count;
+static int tree_count;
+
+static void walken_show_commit(struct commit *cmt, void *buf)
+{
+	commit_count++;
+}
+
+static void walken_show_object(struct object *obj, const char *str, void *buf)
+{
+	switch (obj->type) {
+	case OBJ_TREE:
+		tree_count++;
+		break;
+	case OBJ_BLOB:
+		blob_count++;
+		break;
+	case OBJ_TAG:
+		tag_count++;
+		break;
+	case OBJ_COMMIT:
+		BUG("unexpected commit object in walken_show_object\n");
+	default:
+		BUG("unexpected object type %s in walken_show_object\n",
+				type_name(obj->type));
+	}
+}
+
+static void final_rev_info_setup(struct rev_info *rev)
+{
+//	append_header_grep_pattern(&rev->grep_filter, GREP_HEADER_AUTHOR, "gmail");
+//	compile_grep_patterns(&rev->grep_filter);
+	get_commit_format("oneline", rev);
+	rev->topo_order = 1;
+	rev->sort_order = REV_SORT_BY_AUTHOR_DATE;
+	rev->reverse = 1;
+
+	add_head_to_pending(rev);
+}
+
+static int git_walken_config(const char *var, const char *value, void *cb)
+{
+	grep_config(var, value, cb);
+	return git_default_config(var, value, cb);
+}
+
+static void walken_object_walk(struct rev_info *rev)
+{
+	struct oidset omitted = OIDSET_INIT;
+	struct list_objects_filter_options filter_options;
+
+	rev->tree_objects = 1;
+	rev->blob_objects = 1;
+	rev->tag_objects = 1;
+	rev->tree_blobs_in_commit_order = 1;
+
+	if (prepare_revision_walk(rev))
+		die(_("revision walk setup failed"));
+
+	struct oidset_iter oit;
+	struct object_id *oid = NULL;
+	int omitted_count = 0;
+	oidset_init(&omitted, 0);
+
+	commit_count = 0;
+	tag_count = 0;
+	blob_count = 0;
+	tree_count = 0;
+
+	if (0) {
+		trace_printf(_("Unfiltered object walk.\n"));
+		traverse_commit_list(rev, walken_show_commit, walken_show_object, NULL);
+	} else {
+		trace_printf(
+			_("Filtered object walk with filterspec 'tree:1'.\n"));
+
+		puts("about to parse list objects filter");
+		parse_list_objects_filter(&filter_options, "blob:none");
+		puts("finished parsing list objects filter");
+
+		puts("about to do the traversal");
+		traverse_commit_list_filtered(&filter_options, rev,
+				walken_show_commit, walken_show_object, NULL, &omitted);
+	}
+
+	oidset_iter_init(&omitted, &oit);
+
+	while ((oid = oidset_iter_next(&oit)))
+		omitted_count++;
+
+	printf("commits %d\nblobs %d\ntags: %d\ntrees %d\nomitted %d\n", commit_count, blob_count, tag_count, tree_count, omitted_count);
+//	printf("commits %d\nblobs %d\ntags: %d\ntrees %d\n", commit_count, blob_count, tag_count, tree_count);
+}
+
+static void walken_commit_walk(struct rev_info *rev)
+{
+	struct commit *commit;
+	struct strbuf prettybuf = STRBUF_INIT;
+
+	if (prepare_revision_walk(rev))
+		die(_("revision walk setup failed"));
+
+	while ((commit = get_revision(rev))) {
+		strbuf_reset(&prettybuf);
+		pp_commit_easy(CMIT_FMT_ONELINE, commit, &prettybuf);
+		puts(prettybuf.buf);
+	}
+
+	strbuf_release(&prettybuf);
+}
+
+int cmd_walken(int argc, const char **argv, const char *prefix)
+{
+	static const char * const walken_usage[] = {
+		N_("git walken"),
+		NULL,
+	};
+
+	struct option options[] = {
+		OPT_END()
+	};
+
+	struct rev_info rev;
+
+	argc = parse_options(argc, argv, prefix, options, walken_usage, 0);
+
+	git_config(git_walken_config, NULL);
+
+	repo_init_revisions(the_repository, &rev, prefix);
+
+	if (1) {
+		add_head_to_pending(&rev);
+		walken_object_walk(&rev);
+	} else {
+		final_rev_info_setup(&rev);
+		walken_commit_walk(&rev);
+	}
+
+
+	trace_printf(_("cmd_walken incoming...\n"));
+
+	return 0;
+}
+