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authorDerrick Stolee <dstolee@microsoft.com>2018-04-10 12:56:02 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-04-11 01:43:01 (GMT)
commit2a2e32bdc5a80221981939e77643cec3462b4793 (patch)
treeae0344a998a46747dec3fbaf443e852ae4f71db4 /builtin/commit-graph.c
parentf237c8b6feaa3bad352bd27c14f0d83d0a1c061a (diff)
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commit-graph: implement git commit-graph read
Teach git-commit-graph to read commit graph files and summarize their contents. Use the read subcommand to verify the contents of a commit graph file in the tests. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/commit-graph.c')
-rw-r--r--builtin/commit-graph.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 26b6360..efd3933 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -7,10 +7,16 @@
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 write [--object-dir <objdir>]"),
NULL
};
+static const char * const builtin_commit_graph_read_usage[] = {
+ N_("git commit-graph read [--object-dir <objdir>]"),
+ NULL
+};
+
static const char * const builtin_commit_graph_write_usage[] = {
N_("git commit-graph write [--object-dir <objdir>]"),
NULL
@@ -20,6 +26,54 @@ static struct opts_commit_graph {
const char *obj_dir;
} opts;
+static int graph_read(int argc, const char **argv)
+{
+ struct commit_graph *graph = NULL;
+ char *graph_name;
+
+ static struct option builtin_commit_graph_read_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_read_options,
+ builtin_commit_graph_read_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);
+
+ if (!graph)
+ die("graph file %s does not exist", graph_name);
+ FREE_AND_NULL(graph_name);
+
+ printf("header: %08x %d %d %d %d\n",
+ ntohl(*(uint32_t*)graph->data),
+ *(unsigned char*)(graph->data + 4),
+ *(unsigned char*)(graph->data + 5),
+ *(unsigned char*)(graph->data + 6),
+ *(unsigned char*)(graph->data + 7));
+ printf("num_commits: %u\n", graph->num_commits);
+ printf("chunks:");
+
+ if (graph->chunk_oid_fanout)
+ printf(" oid_fanout");
+ if (graph->chunk_oid_lookup)
+ printf(" oid_lookup");
+ if (graph->chunk_commit_data)
+ printf(" commit_metadata");
+ if (graph->chunk_large_edges)
+ printf(" large_edges");
+ printf("\n");
+
+ return 0;
+}
+
static int graph_write(int argc, const char **argv)
{
static struct option builtin_commit_graph_write_options[] = {
@@ -60,6 +114,8 @@ int cmd_commit_graph(int argc, const char **argv, const char *prefix)
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc > 0) {
+ if (!strcmp(argv[0], "read"))
+ return graph_read(argc, argv);
if (!strcmp(argv[0], "write"))
return graph_write(argc, argv);
}