1 files changed, 82 insertions, 0 deletions
diff --git a/t/helper/test-read-cache.c b/t/helper/test-read-cache.c
new file mode 100644
index 0000000000..b52c174acc
--- /dev/null
+++ b/t/helper/test-read-cache.c
@@ -0,0 +1,82 @@
+#include "test-tool.h"
+#include "cache.h"
+#include "config.h"
+#include "blob.h"
+#include "commit.h"
+#include "tree.h"
+#include "sparse-index.h"
+
+static void print_cache_entry(struct cache_entry *ce)
+{
+	const char *type;
+	printf("%06o ", ce->ce_mode & 0177777);
+
+	if (S_ISSPARSEDIR(ce->ce_mode))
+		type = tree_type;
+	else if (S_ISGITLINK(ce->ce_mode))
+		type = commit_type;
+	else
+		type = blob_type;
+
+	printf("%s %s\t%s\n",
+	       type,
+	       oid_to_hex(&ce->oid),
+	       ce->name);
+}
+
+static void print_cache(struct index_state *istate)
+{
+	int i;
+	for (i = 0; i < istate->cache_nr; i++)
+		print_cache_entry(istate->cache[i]);
+}
+
+int cmd__read_cache(int argc, const char **argv)
+{
+	struct repository *r = the_repository;
+	int i, cnt = 1;
+	const char *name = NULL;
+	int table = 0, expand = 0;
+
+	initialize_the_repository();
+	prepare_repo_settings(r);
+	r->settings.command_requires_full_index = 0;
+
+	for (++argv, --argc; *argv && starts_with(*argv, "--"); ++argv, --argc) {
+		if (skip_prefix(*argv, "--print-and-refresh=", &name))
+			continue;
+		if (!strcmp(*argv, "--table"))
+			table = 1;
+		else if (!strcmp(*argv, "--expand"))
+			expand = 1;
+	}
+
+	if (argc == 1)
+		cnt = strtol(argv[0], NULL, 0);
+	setup_git_directory();
+	git_config(git_default_config, NULL);
+
+	for (i = 0; i < cnt; i++) {
+		repo_read_index(r);
+
+		if (expand)
+			ensure_full_index(r->index);
+
+		if (name) {
+			int pos;
+
+			refresh_index(r->index, REFRESH_QUIET,
+				      NULL, NULL, NULL);
+			pos = index_name_pos(r->index, name, strlen(name));
+			if (pos < 0)
+				die("%s not in index", name);
+			printf("%s is%s up to date\n", name,
+			       ce_uptodate(r->index->cache[pos]) ? "" : " not");
+			write_file(name, "%d\n", i);
+		}
+		if (table)
+			print_cache(r->index);
+		discard_index(r->index);
+	}
+	return 0;
+}