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-rw-r--r--builtin/commit-graph.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
new file mode 100644
index 0000000000..37420ae0fd
--- /dev/null
+++ b/builtin/commit-graph.c
@@ -0,0 +1,171 @@
+#include "builtin.h"
+#include "config.h"
+#include "dir.h"
+#include "lockfile.h"
+#include "parse-options.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 write [--object-dir <objdir>] [--append] [--stdin-packs|--stdin-commits]"),
+ 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>] [--append] [--stdin-packs|--stdin-commits]"),
+ NULL
+};
+
+static struct opts_commit_graph {
+ const char *obj_dir;
+ int stdin_packs;
+ int stdin_commits;
+ int append;
+} 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)
+{
+ const char **pack_indexes = NULL;
+ int packs_nr = 0;
+ const char **commit_hex = NULL;
+ int commits_nr = 0;
+ const char **lines = NULL;
+ int lines_nr = 0;
+ int lines_alloc = 0;
+
+ static struct option builtin_commit_graph_write_options[] = {
+ OPT_STRING(0, "object-dir", &opts.obj_dir,
+ N_("dir"),
+ N_("The object directory to store the graph")),
+ OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
+ N_("scan pack-indexes listed by stdin for commits")),
+ OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
+ N_("start walk at commits listed by stdin")),
+ OPT_BOOL(0, "append", &opts.append,
+ N_("include all commits already in the commit-graph file")),
+ OPT_END(),
+ };
+
+ argc = parse_options(argc, argv, NULL,
+ builtin_commit_graph_write_options,
+ builtin_commit_graph_write_usage, 0);
+
+ if (opts.stdin_packs && opts.stdin_commits)
+ die(_("cannot use both --stdin-commits and --stdin-packs"));
+ if (!opts.obj_dir)
+ opts.obj_dir = get_object_directory();
+
+ if (opts.stdin_packs || opts.stdin_commits) {
+ struct strbuf buf = STRBUF_INIT;
+ lines_nr = 0;
+ lines_alloc = 128;
+ ALLOC_ARRAY(lines, lines_alloc);
+
+ while (strbuf_getline(&buf, stdin) != EOF) {
+ ALLOC_GROW(lines, lines_nr + 1, lines_alloc);
+ lines[lines_nr++] = strbuf_detach(&buf, NULL);
+ }
+
+ if (opts.stdin_packs) {
+ pack_indexes = lines;
+ packs_nr = lines_nr;
+ }
+ if (opts.stdin_commits) {
+ commit_hex = lines;
+ commits_nr = lines_nr;
+ }
+ }
+
+ write_commit_graph(opts.obj_dir,
+ pack_indexes,
+ packs_nr,
+ commit_hex,
+ commits_nr,
+ opts.append);
+
+ return 0;
+}
+
+int cmd_commit_graph(int argc, const char **argv, const char *prefix)
+{
+ static struct option builtin_commit_graph_options[] = {
+ OPT_STRING(0, "object-dir", &opts.obj_dir,
+ N_("dir"),
+ N_("The object directory to store the graph")),
+ OPT_END(),
+ };
+
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage_with_options(builtin_commit_graph_usage,
+ builtin_commit_graph_options);
+
+ git_config(git_default_config, NULL);
+ argc = parse_options(argc, argv, prefix,
+ builtin_commit_graph_options,
+ builtin_commit_graph_usage,
+ 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);
+ }
+
+ usage_with_options(builtin_commit_graph_usage,
+ builtin_commit_graph_options);
+}