#include "alloc.h"
#include "hashmap.h"
#include "replace-object.h"
+#include "progress.h"
#define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
#define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
#define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */
#define GRAPH_CHUNKID_LARGEEDGES 0x45444745 /* "EDGE" */
-#define GRAPH_DATA_WIDTH 36
+#define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16)
#define GRAPH_VERSION_1 0x1
#define GRAPH_VERSION GRAPH_VERSION_1
-#define GRAPH_OID_VERSION_SHA1 1
-#define GRAPH_OID_LEN_SHA1 GIT_SHA1_RAWSZ
-#define GRAPH_OID_VERSION GRAPH_OID_VERSION_SHA1
-#define GRAPH_OID_LEN GRAPH_OID_LEN_SHA1
-
#define GRAPH_OCTOPUS_EDGES_NEEDED 0x80000000
-#define GRAPH_PARENT_MISSING 0x7fffffff
#define GRAPH_EDGE_LAST_MASK 0x7fffffff
#define GRAPH_PARENT_NONE 0x70000000
#define GRAPH_FANOUT_SIZE (4 * 256)
#define GRAPH_CHUNKLOOKUP_WIDTH 12
#define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \
- + GRAPH_FANOUT_SIZE + GRAPH_OID_LEN)
+ + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz)
char *get_commit_graph_filename(const char *obj_dir)
{
return xstrfmt("%s/info/commit-graph", obj_dir);
}
+static uint8_t oid_version(void)
+{
+ return 1;
+}
+
static struct commit_graph *alloc_commit_graph(void)
{
struct commit_graph *g = xcalloc(1, sizeof(*g));
}
hash_version = *(unsigned char*)(data + 5);
- if (hash_version != GRAPH_OID_VERSION) {
+ if (hash_version != oid_version()) {
error(_("hash version %X does not match version %X"),
- hash_version, GRAPH_OID_VERSION);
+ hash_version, oid_version());
goto cleanup_fail;
}
graph = alloc_commit_graph();
- graph->hash_len = GRAPH_OID_LEN;
+ graph->hash_len = the_hash_algo->rawsz;
graph->num_chunks = *(unsigned char*)(data + 6);
graph->graph_fd = fd;
graph->data = graph_map;
chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH;
- if (chunk_offset > graph_size - GIT_MAX_RAWSZ) {
+ if (chunk_offset > graph_size - the_hash_algo->rawsz) {
error(_("improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32),
(uint32_t)chunk_offset);
goto cleanup_fail;
*/
static int prepare_commit_graph(struct repository *r)
{
- struct alternate_object_database *alt;
- char *obj_dir;
+ struct object_directory *odb;
int config_value;
if (r->objects->commit_graph_attempted)
return !!r->objects->commit_graph;
r->objects->commit_graph_attempted = 1;
- if (repo_config_get_bool(r, "core.commitgraph", &config_value) ||
- !config_value)
+ if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) &&
+ (repo_config_get_bool(r, "core.commitgraph", &config_value) ||
+ !config_value))
/*
* This repository is not configured to use commit graphs, so
* do not load one. (But report commit_graph_attempted anyway
if (!commit_graph_compatible(r))
return 0;
- obj_dir = r->objects->objectdir;
- prepare_commit_graph_one(r, obj_dir);
prepare_alt_odb(r);
- for (alt = r->objects->alt_odb_list;
- !r->objects->commit_graph && alt;
- alt = alt->next)
- prepare_commit_graph_one(r, alt->path);
+ for (odb = r->objects->odb;
+ !r->objects->commit_graph && odb;
+ odb = odb->next)
+ prepare_commit_graph_one(r, odb->path);
return !!r->objects->commit_graph;
}
+int generation_numbers_enabled(struct repository *r)
+{
+ uint32_t first_generation;
+ struct commit_graph *g;
+ if (!prepare_commit_graph(r))
+ return 0;
+
+ g = r->objects->commit_graph;
+
+ if (!g->num_commits)
+ return 0;
+
+ first_generation = get_be32(g->chunk_commit_data +
+ g->hash_len + 8) >> 2;
+
+ return !!first_generation;
+}
+
void close_commit_graph(struct repository *r)
{
free_commit_graph(r->objects->commit_graph);
g->chunk_oid_lookup, g->hash_len, pos);
}
-static struct commit_list **insert_parent_or_die(struct commit_graph *g,
+static struct commit_list **insert_parent_or_die(struct repository *r,
+ struct commit_graph *g,
uint64_t pos,
struct commit_list **pptr)
{
die("invalid parent position %"PRIu64, pos);
hashcpy(oid.hash, g->chunk_oid_lookup + g->hash_len * pos);
- c = lookup_commit(the_repository, &oid);
+ c = lookup_commit(r, &oid);
if (!c)
die(_("could not find commit %s"), oid_to_hex(&oid));
c->graph_pos = pos;
item->generation = get_be32(commit_data + g->hash_len + 8) >> 2;
}
-static int fill_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t pos)
+static int fill_commit_in_graph(struct repository *r,
+ struct commit *item,
+ struct commit_graph *g, uint32_t pos)
{
uint32_t edge_value;
uint32_t *parent_data_ptr;
edge_value = get_be32(commit_data + g->hash_len);
if (edge_value == GRAPH_PARENT_NONE)
return 1;
- pptr = insert_parent_or_die(g, edge_value, pptr);
+ pptr = insert_parent_or_die(r, g, edge_value, pptr);
edge_value = get_be32(commit_data + g->hash_len + 4);
if (edge_value == GRAPH_PARENT_NONE)
return 1;
if (!(edge_value & GRAPH_OCTOPUS_EDGES_NEEDED)) {
- pptr = insert_parent_or_die(g, edge_value, pptr);
+ pptr = insert_parent_or_die(r, g, edge_value, pptr);
return 1;
}
4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK));
do {
edge_value = get_be32(parent_data_ptr);
- pptr = insert_parent_or_die(g,
+ pptr = insert_parent_or_die(r, g,
edge_value & GRAPH_EDGE_LAST_MASK,
pptr);
parent_data_ptr++;
}
}
-static int parse_commit_in_graph_one(struct commit_graph *g, struct commit *item)
+static int parse_commit_in_graph_one(struct repository *r,
+ struct commit_graph *g,
+ struct commit *item)
{
uint32_t pos;
return 1;
if (find_commit_in_graph(item, g, &pos))
- return fill_commit_in_graph(item, g, pos);
+ return fill_commit_in_graph(r, item, g, pos);
return 0;
}
{
if (!prepare_commit_graph(r))
return 0;
- return parse_commit_in_graph_one(r->objects->commit_graph, item);
+ return parse_commit_in_graph_one(r, r->objects->commit_graph, item);
}
void load_commit_graph_info(struct repository *r, struct commit *item)
fill_commit_graph_info(item, r->objects->commit_graph, pos);
}
-static struct tree *load_tree_for_commit(struct commit_graph *g, struct commit *c)
+static struct tree *load_tree_for_commit(struct repository *r,
+ struct commit_graph *g,
+ struct commit *c)
{
struct object_id oid;
const unsigned char *commit_data = g->chunk_commit_data +
GRAPH_DATA_WIDTH * (c->graph_pos);
hashcpy(oid.hash, commit_data);
- c->maybe_tree = lookup_tree(the_repository, &oid);
+ c->maybe_tree = lookup_tree(r, &oid);
return c->maybe_tree;
}
-static struct tree *get_commit_tree_in_graph_one(struct commit_graph *g,
+static struct tree *get_commit_tree_in_graph_one(struct repository *r,
+ struct commit_graph *g,
const struct commit *c)
{
if (c->maybe_tree)
if (c->graph_pos == COMMIT_NOT_FROM_GRAPH)
BUG("get_commit_tree_in_graph_one called from non-commit-graph commit");
- return load_tree_for_commit(g, (struct commit *)c);
+ return load_tree_for_commit(r, g, (struct commit *)c);
}
struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c)
{
- return get_commit_tree_in_graph_one(r->objects->commit_graph, c);
+ return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c);
}
static void write_graph_chunk_fanout(struct hashfile *f,
commit_to_sha1);
if (edge_value < 0)
- edge_value = GRAPH_PARENT_MISSING;
+ BUG("missing parent %s for commit %s",
+ oid_to_hex(&parent->item->object.oid),
+ oid_to_hex(&(*list)->object.oid));
}
hashwrite_be32(f, edge_value);
nr_commits,
commit_to_sha1);
if (edge_value < 0)
- edge_value = GRAPH_PARENT_MISSING;
+ BUG("missing parent %s for commit %s",
+ oid_to_hex(&parent->item->object.oid),
+ oid_to_hex(&(*list)->object.oid));
}
hashwrite_be32(f, edge_value);
commit_to_sha1);
if (edge_value < 0)
- edge_value = GRAPH_PARENT_MISSING;
+ BUG("missing parent %s for commit %s",
+ oid_to_hex(&parent->item->object.oid),
+ oid_to_hex(&(*list)->object.oid));
else if (!parent->next)
edge_value |= GRAPH_LAST_EDGE;
struct object_id *list;
int nr;
int alloc;
+ struct progress *progress;
+ int progress_done;
};
static int add_packed_commits(const struct object_id *oid,
off_t offset = nth_packed_object_offset(pack, pos);
struct object_info oi = OBJECT_INFO_INIT;
+ if (list->progress)
+ display_progress(list->progress, ++list->progress_done);
+
oi.typep = &type;
if (packed_object_info(the_repository, pack, offset, &oi) < 0)
die(_("unable to get type of object %s"), oid_to_hex(oid));
}
}
-static void close_reachable(struct packed_oid_list *oids)
+static void close_reachable(struct packed_oid_list *oids, int report_progress)
{
- int i;
+ int i, j;
struct commit *commit;
+ struct progress *progress = NULL;
+ if (report_progress)
+ progress = start_delayed_progress(
+ _("Loading known commits in commit graph"), j = 0);
for (i = 0; i < oids->nr; i++) {
+ display_progress(progress, ++j);
commit = lookup_commit(the_repository, &oids->list[i]);
if (commit)
commit->object.flags |= UNINTERESTING;
}
+ stop_progress(&progress);
/*
* As this loop runs, oids->nr may grow, but not more
* than the number of missing commits in the reachable
* closure.
*/
+ if (report_progress)
+ progress = start_delayed_progress(
+ _("Expanding reachable commits in commit graph"), j = 0);
for (i = 0; i < oids->nr; i++) {
+ display_progress(progress, ++j);
commit = lookup_commit(the_repository, &oids->list[i]);
if (commit && !parse_commit(commit))
add_missing_parents(oids, commit);
}
+ stop_progress(&progress);
+ if (report_progress)
+ progress = start_delayed_progress(
+ _("Clearing commit marks in commit graph"), j = 0);
for (i = 0; i < oids->nr; i++) {
+ display_progress(progress, ++j);
commit = lookup_commit(the_repository, &oids->list[i]);
if (commit)
commit->object.flags &= ~UNINTERESTING;
}
+ stop_progress(&progress);
}
-static void compute_generation_numbers(struct packed_commit_list* commits)
+static void compute_generation_numbers(struct packed_commit_list* commits,
+ int report_progress)
{
int i;
struct commit_list *list = NULL;
+ struct progress *progress = NULL;
+ if (report_progress)
+ progress = start_progress(
+ _("Computing commit graph generation numbers"),
+ commits->nr);
for (i = 0; i < commits->nr; i++) {
+ display_progress(progress, i + 1);
if (commits->list[i]->generation != GENERATION_NUMBER_INFINITY &&
commits->list[i]->generation != GENERATION_NUMBER_ZERO)
continue;
}
}
}
+ stop_progress(&progress);
}
static int add_ref_to_list(const char *refname,
return 0;
}
-void write_commit_graph_reachable(const char *obj_dir, int append)
+void write_commit_graph_reachable(const char *obj_dir, int append,
+ int report_progress)
{
- struct string_list list;
+ struct string_list list = STRING_LIST_INIT_DUP;
- string_list_init(&list, 1);
for_each_ref(add_ref_to_list, &list);
- write_commit_graph(obj_dir, NULL, &list, append);
+ write_commit_graph(obj_dir, NULL, &list, append, report_progress);
+
+ string_list_clear(&list, 0);
}
void write_commit_graph(const char *obj_dir,
struct string_list *pack_indexes,
struct string_list *commit_hex,
- int append)
+ int append, int report_progress)
{
struct packed_oid_list oids;
struct packed_commit_list commits;
int num_chunks;
int num_extra_edges;
struct commit_list *parent;
+ struct progress *progress = NULL;
+ const unsigned hashsz = the_hash_algo->rawsz;
if (!commit_graph_compatible(the_repository))
return;
oids.nr = 0;
- oids.alloc = approximate_object_count() / 4;
+ oids.alloc = approximate_object_count() / 32;
+ oids.progress = NULL;
+ oids.progress_done = 0;
if (append) {
prepare_commit_graph_one(the_repository, obj_dir);
int dirlen;
strbuf_addf(&packname, "%s/pack/", obj_dir);
dirlen = packname.len;
+ if (report_progress) {
+ oids.progress = start_delayed_progress(
+ _("Finding commits for commit graph"), 0);
+ oids.progress_done = 0;
+ }
for (i = 0; i < pack_indexes->nr; i++) {
struct packed_git *p;
strbuf_setlen(&packname, dirlen);
die(_("error opening index for %s"), packname.buf);
for_each_object_in_pack(p, add_packed_commits, &oids, 0);
close_pack(p);
+ free(p);
}
+ stop_progress(&oids.progress);
strbuf_release(&packname);
}
if (commit_hex) {
+ if (report_progress)
+ progress = start_delayed_progress(
+ _("Finding commits for commit graph"),
+ commit_hex->nr);
for (i = 0; i < commit_hex->nr; i++) {
const char *end;
struct object_id oid;
struct commit *result;
+ display_progress(progress, i + 1);
if (commit_hex->items[i].string &&
parse_oid_hex(commit_hex->items[i].string, &oid, &end))
continue;
oids.nr++;
}
}
+ stop_progress(&progress);
}
- if (!pack_indexes && !commit_hex)
+ if (!pack_indexes && !commit_hex) {
+ if (report_progress)
+ oids.progress = start_delayed_progress(
+ _("Finding commits for commit graph"), 0);
for_each_packed_object(add_packed_commits, &oids, 0);
+ stop_progress(&oids.progress);
+ }
- close_reachable(&oids);
+ close_reachable(&oids, report_progress);
QSORT(oids.list, oids.nr, commit_compare);
count_distinct = 1;
for (i = 1; i < oids.nr; i++) {
- if (oidcmp(&oids.list[i-1], &oids.list[i]))
+ if (!oideq(&oids.list[i - 1], &oids.list[i]))
count_distinct++;
}
- if (count_distinct >= GRAPH_PARENT_MISSING)
+ if (count_distinct >= GRAPH_EDGE_LAST_MASK)
die(_("the commit graph format cannot write %d commits"), count_distinct);
commits.nr = 0;
num_extra_edges = 0;
for (i = 0; i < oids.nr; i++) {
int num_parents = 0;
- if (i > 0 && !oidcmp(&oids.list[i-1], &oids.list[i]))
+ if (i > 0 && oideq(&oids.list[i - 1], &oids.list[i]))
continue;
commits.list[commits.nr] = lookup_commit(the_repository, &oids.list[i]);
}
num_chunks = num_extra_edges ? 4 : 3;
- if (commits.nr >= GRAPH_PARENT_MISSING)
+ if (commits.nr >= GRAPH_EDGE_LAST_MASK)
die(_("too many commits to write graph"));
- compute_generation_numbers(&commits);
+ compute_generation_numbers(&commits, report_progress);
graph_name = get_commit_graph_filename(obj_dir);
- if (safe_create_leading_directories(graph_name))
+ if (safe_create_leading_directories(graph_name)) {
+ UNLEAK(graph_name);
die_errno(_("unable to create leading directories of %s"),
graph_name);
+ }
hold_lock_file_for_update(&lk, graph_name, LOCK_DIE_ON_ERROR);
f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf);
hashwrite_be32(f, GRAPH_SIGNATURE);
hashwrite_u8(f, GRAPH_VERSION);
- hashwrite_u8(f, GRAPH_OID_VERSION);
+ hashwrite_u8(f, oid_version());
hashwrite_u8(f, num_chunks);
hashwrite_u8(f, 0); /* unused padding byte */
chunk_offsets[0] = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH;
chunk_offsets[1] = chunk_offsets[0] + GRAPH_FANOUT_SIZE;
- chunk_offsets[2] = chunk_offsets[1] + GRAPH_OID_LEN * commits.nr;
- chunk_offsets[3] = chunk_offsets[2] + (GRAPH_OID_LEN + 16) * commits.nr;
+ chunk_offsets[2] = chunk_offsets[1] + hashsz * commits.nr;
+ chunk_offsets[3] = chunk_offsets[2] + (hashsz + 16) * commits.nr;
chunk_offsets[4] = chunk_offsets[3] + 4 * num_extra_edges;
for (i = 0; i <= num_chunks; i++) {
}
write_graph_chunk_fanout(f, commits.list, commits.nr);
- write_graph_chunk_oids(f, GRAPH_OID_LEN, commits.list, commits.nr);
- write_graph_chunk_data(f, GRAPH_OID_LEN, commits.list, commits.nr);
+ write_graph_chunk_oids(f, hashsz, commits.list, commits.nr);
+ write_graph_chunk_data(f, hashsz, commits.list, commits.nr);
write_graph_chunk_large_edges(f, commits.list, commits.nr);
close_commit_graph(the_repository);
finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC);
commit_lock_file(&lk);
+ free(graph_name);
+ free(commits.list);
free(oids.list);
- oids.alloc = 0;
- oids.nr = 0;
}
#define VERIFY_COMMIT_GRAPH_ERROR_HASH 2
int generation_zero = 0;
struct hashfile *f;
int devnull;
+ struct progress *progress = NULL;
if (!g) {
graph_report("no commit-graph file loaded");
f = hashfd(devnull, NULL);
hashwrite(f, g->data, g->data_len - g->hash_len);
finalize_hashfile(f, checksum.hash, CSUM_CLOSE);
- if (hashcmp(checksum.hash, g->data + g->data_len - g->hash_len)) {
+ if (!hasheq(checksum.hash, g->data + g->data_len - g->hash_len)) {
graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt"));
verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH;
}
}
graph_commit = lookup_commit(r, &cur_oid);
- if (!parse_commit_in_graph_one(g, graph_commit))
+ if (!parse_commit_in_graph_one(r, g, graph_commit))
graph_report("failed to parse %s from commit-graph",
oid_to_hex(&cur_oid));
}
if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH)
return verify_commit_graph_error;
+ progress = start_progress(_("Verifying commits in commit graph"),
+ g->num_commits);
for (i = 0; i < g->num_commits; i++) {
struct commit *graph_commit, *odb_commit;
struct commit_list *graph_parents, *odb_parents;
uint32_t max_generation = 0;
+ display_progress(progress, i + 1);
hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i);
graph_commit = lookup_commit(r, &cur_oid);
continue;
}
- if (oidcmp(&get_commit_tree_in_graph_one(g, graph_commit)->object.oid,
+ if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid,
get_commit_tree_oid(odb_commit)))
graph_report("root tree OID for commit %s in commit-graph is %s != %s",
oid_to_hex(&cur_oid),
break;
}
- if (oidcmp(&graph_parents->item->object.oid, &odb_parents->item->object.oid))
+ if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid))
graph_report("commit-graph parent for %s is %s != %s",
oid_to_hex(&cur_oid),
oid_to_hex(&graph_parents->item->object.oid),
graph_commit->date,
odb_commit->date);
}
+ stop_progress(&progress);
return verify_commit_graph_error;
}