commit-graph: add 'verify' subcommand
If the commit-graph file becomes corrupt, we need a way to verify
that its contents match the object database. In the manner of
'git fsck' we will implement a 'git commit-graph verify' subcommand
to report all issues with the file.
Add the 'verify' subcommand to the 'commit-graph' builtin and its
documentation. The subcommand is currently a no-op except for
loading the commit-graph into memory, which may trigger run-time
errors that would be caught by normal use. Add a simple test that
ensures the command returns a zero error code.
If no commit-graph file exists, this is an acceptable state. Do
not report any errors.
Helped-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index f0875b8..9d108f4 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -3,15 +3,22 @@
#include "dir.h"
#include "lockfile.h"
#include "parse-options.h"
+#include "repository.h"
#include "commit-graph.h"
static char const * const builtin_commit_graph_usage[] = {
N_("git commit-graph [--object-dir <objdir>]"),
N_("git commit-graph read [--object-dir <objdir>]"),
+ N_("git commit-graph verify [--object-dir <objdir>]"),
N_("git commit-graph write [--object-dir <objdir>] [--append] [--stdin-packs|--stdin-commits]"),
NULL
};
+static const char * const builtin_commit_graph_verify_usage[] = {
+ N_("git commit-graph verify [--object-dir <objdir>]"),
+ NULL
+};
+
static const char * const builtin_commit_graph_read_usage[] = {
N_("git commit-graph read [--object-dir <objdir>]"),
NULL
@@ -29,6 +36,36 @@ static struct opts_commit_graph {
int append;
} opts;
+
+static int graph_verify(int argc, const char **argv)
+{
+ struct commit_graph *graph = NULL;
+ char *graph_name;
+
+ static struct option builtin_commit_graph_verify_options[] = {
+ OPT_STRING(0, "object-dir", &opts.obj_dir,
+ N_("dir"),
+ N_("The object directory to store the graph")),
+ OPT_END(),
+ };
+
+ argc = parse_options(argc, argv, NULL,
+ builtin_commit_graph_verify_options,
+ builtin_commit_graph_verify_usage, 0);
+
+ if (!opts.obj_dir)
+ opts.obj_dir = get_object_directory();
+
+ graph_name = get_commit_graph_filename(opts.obj_dir);
+ graph = load_commit_graph_one(graph_name);
+ FREE_AND_NULL(graph_name);
+
+ if (!graph)
+ return 0;
+
+ return verify_commit_graph(the_repository, graph);
+}
+
static int graph_read(int argc, const char **argv)
{
struct commit_graph *graph = NULL;
@@ -165,6 +202,8 @@ int cmd_commit_graph(int argc, const char **argv, const char *prefix)
if (argc > 0) {
if (!strcmp(argv[0], "read"))
return graph_read(argc, argv);
+ if (!strcmp(argv[0], "verify"))
+ return graph_verify(argc, argv);
if (!strcmp(argv[0], "write"))
return graph_write(argc, argv);
}
