#include "cache.h"
#include "config.h"
+#include "dir.h"
#include "git-compat-util.h"
#include "lockfile.h"
#include "pack.h"
#include "revision.h"
#include "sha1-lookup.h"
#include "commit-graph.h"
+#include "object-store.h"
#define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
#define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
#define GRAPH_MIN_SIZE (5 * GRAPH_CHUNKLOOKUP_WIDTH + GRAPH_FANOUT_SIZE + \
GRAPH_OID_LEN + 8)
-
char *get_commit_graph_filename(const char *obj_dir)
{
return xstrfmt("%s/info/commit-graph", obj_dir);
if (graph_size < GRAPH_MIN_SIZE) {
close(fd);
- die("graph file %s is too small", graph_file);
+ die(_("graph file %s is too small"), graph_file);
}
graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0);
data = (const unsigned char *)graph_map;
graph_signature = get_be32(data);
if (graph_signature != GRAPH_SIGNATURE) {
- error("graph signature %X does not match signature %X",
+ error(_("graph signature %X does not match signature %X"),
graph_signature, GRAPH_SIGNATURE);
goto cleanup_fail;
}
graph_version = *(unsigned char*)(data + 4);
if (graph_version != GRAPH_VERSION) {
- error("graph version %X does not match version %X",
+ error(_("graph version %X does not match version %X"),
graph_version, GRAPH_VERSION);
goto cleanup_fail;
}
hash_version = *(unsigned char*)(data + 5);
if (hash_version != GRAPH_OID_VERSION) {
- error("hash version %X does not match version %X",
+ error(_("hash version %X does not match version %X"),
hash_version, GRAPH_OID_VERSION);
goto cleanup_fail;
}
chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH;
if (chunk_offset > graph_size - GIT_MAX_RAWSZ) {
- error("improper chunk offset %08x%08x", (uint32_t)(chunk_offset >> 32),
+ error(_("improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32),
(uint32_t)chunk_offset);
goto cleanup_fail;
}
}
if (chunk_repeated) {
- error("chunk id %08x appears multiple times", chunk_id);
+ error(_("chunk id %08x appears multiple times"), chunk_id);
goto cleanup_fail;
}
exit(1);
}
+/* global storage */
+static struct commit_graph *commit_graph = NULL;
+
+static void prepare_commit_graph_one(const char *obj_dir)
+{
+ char *graph_name;
+
+ if (commit_graph)
+ return;
+
+ graph_name = get_commit_graph_filename(obj_dir);
+ commit_graph = load_commit_graph_one(graph_name);
+
+ FREE_AND_NULL(graph_name);
+}
+
+static int prepare_commit_graph_run_once = 0;
+static void prepare_commit_graph(void)
+{
+ struct alternate_object_database *alt;
+ char *obj_dir;
+
+ if (prepare_commit_graph_run_once)
+ return;
+ prepare_commit_graph_run_once = 1;
+
+ obj_dir = get_object_directory();
+ prepare_commit_graph_one(obj_dir);
+ prepare_alt_odb(the_repository);
+ for (alt = the_repository->objects->alt_odb_list;
+ !commit_graph && alt;
+ alt = alt->next)
+ prepare_commit_graph_one(alt->path);
+}
+
+static void close_commit_graph(void)
+{
+ if (!commit_graph)
+ return;
+
+ if (commit_graph->graph_fd >= 0) {
+ munmap((void *)commit_graph->data, commit_graph->data_len);
+ commit_graph->data = NULL;
+ close(commit_graph->graph_fd);
+ }
+
+ FREE_AND_NULL(commit_graph);
+}
+
+static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos)
+{
+ return bsearch_hash(oid->hash, g->chunk_oid_fanout,
+ g->chunk_oid_lookup, g->hash_len, pos);
+}
+
+static struct commit_list **insert_parent_or_die(struct commit_graph *g,
+ uint64_t pos,
+ struct commit_list **pptr)
+{
+ struct commit *c;
+ struct object_id oid;
+ hashcpy(oid.hash, g->chunk_oid_lookup + g->hash_len * pos);
+ c = lookup_commit(&oid);
+ if (!c)
+ die(_("could not find commit %s"), oid_to_hex(&oid));
+ c->graph_pos = pos;
+ return &commit_list_insert(c, pptr)->next;
+}
+
+static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos)
+{
+ const unsigned char *commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * pos;
+ item->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)
+{
+ uint32_t edge_value;
+ uint32_t *parent_data_ptr;
+ uint64_t date_low, date_high;
+ struct commit_list **pptr;
+ const unsigned char *commit_data = g->chunk_commit_data + (g->hash_len + 16) * pos;
+
+ item->object.parsed = 1;
+ item->graph_pos = pos;
+
+ item->maybe_tree = NULL;
+
+ date_high = get_be32(commit_data + g->hash_len + 8) & 0x3;
+ date_low = get_be32(commit_data + g->hash_len + 12);
+ item->date = (timestamp_t)((date_high << 32) | date_low);
+
+ item->generation = get_be32(commit_data + g->hash_len + 8) >> 2;
+
+ pptr = &item->parents;
+
+ 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);
+
+ 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);
+ return 1;
+ }
+
+ parent_data_ptr = (uint32_t*)(g->chunk_large_edges +
+ 4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK));
+ do {
+ edge_value = get_be32(parent_data_ptr);
+ pptr = insert_parent_or_die(g,
+ edge_value & GRAPH_EDGE_LAST_MASK,
+ pptr);
+ parent_data_ptr++;
+ } while (!(edge_value & GRAPH_LAST_EDGE));
+
+ return 1;
+}
+
+static int find_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos)
+{
+ if (item->graph_pos != COMMIT_NOT_FROM_GRAPH) {
+ *pos = item->graph_pos;
+ return 1;
+ } else {
+ return bsearch_graph(g, &(item->object.oid), pos);
+ }
+}
+
+int parse_commit_in_graph(struct commit *item)
+{
+ uint32_t pos;
+
+ if (!core_commit_graph)
+ return 0;
+ if (item->object.parsed)
+ return 1;
+ prepare_commit_graph();
+ if (commit_graph && find_commit_in_graph(item, commit_graph, &pos))
+ return fill_commit_in_graph(item, commit_graph, pos);
+ return 0;
+}
+
+void load_commit_graph_info(struct commit *item)
+{
+ uint32_t pos;
+ if (!core_commit_graph)
+ return;
+ prepare_commit_graph();
+ if (commit_graph && find_commit_in_graph(item, commit_graph, &pos))
+ fill_commit_graph_info(item, commit_graph, pos);
+}
+
+static struct tree *load_tree_for_commit(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(&oid);
+
+ return c->maybe_tree;
+}
+
+struct tree *get_commit_tree_in_graph(const struct commit *c)
+{
+ if (c->maybe_tree)
+ return c->maybe_tree;
+ if (c->graph_pos == COMMIT_NOT_FROM_GRAPH)
+ BUG("get_commit_tree_in_graph called from non-commit-graph commit");
+
+ return load_tree_for_commit(commit_graph, (struct commit *)c);
+}
+
static void write_graph_chunk_fanout(struct hashfile *f,
struct commit **commits,
int nr_commits)
uint32_t packedDate[2];
parse_commit(*list);
- hashwrite(f, (*list)->tree->object.oid.hash, hash_len);
+ hashwrite(f, get_commit_tree_oid(*list)->hash, hash_len);
parent = (*list)->parents;
else
packedDate[0] = 0;
+ packedDate[0] |= htonl((*list)->generation << 2);
+
packedDate[1] = htonl((*list)->date);
hashwrite(f, packedDate, 8);
struct object_info oi = OBJECT_INFO_INIT;
oi.typep = &type;
- if (packed_object_info(pack, offset, &oi) < 0)
- die("unable to get type of object %s", oid_to_hex(oid));
+ if (packed_object_info(the_repository, pack, offset, &oi) < 0)
+ die(_("unable to get type of object %s"), oid_to_hex(oid));
if (type != OBJ_COMMIT)
return 0;
}
}
-void write_commit_graph(const char *obj_dir)
+static void compute_generation_numbers(struct packed_commit_list* commits)
+{
+ int i;
+ struct commit_list *list = NULL;
+
+ for (i = 0; i < commits->nr; i++) {
+ if (commits->list[i]->generation != GENERATION_NUMBER_INFINITY &&
+ commits->list[i]->generation != GENERATION_NUMBER_ZERO)
+ continue;
+
+ commit_list_insert(commits->list[i], &list);
+ while (list) {
+ struct commit *current = list->item;
+ struct commit_list *parent;
+ int all_parents_computed = 1;
+ uint32_t max_generation = 0;
+
+ for (parent = current->parents; parent; parent = parent->next) {
+ if (parent->item->generation == GENERATION_NUMBER_INFINITY ||
+ parent->item->generation == GENERATION_NUMBER_ZERO) {
+ all_parents_computed = 0;
+ commit_list_insert(parent->item, &list);
+ break;
+ } else if (parent->item->generation > max_generation) {
+ max_generation = parent->item->generation;
+ }
+ }
+
+ if (all_parents_computed) {
+ current->generation = max_generation + 1;
+ pop_commit(&list);
+
+ if (current->generation > GENERATION_NUMBER_MAX)
+ current->generation = GENERATION_NUMBER_MAX;
+ }
+ }
+ }
+}
+
+void write_commit_graph(const char *obj_dir,
+ const char **pack_indexes,
+ int nr_packs,
+ const char **commit_hex,
+ int nr_commits,
+ int append)
{
struct packed_oid_list oids;
struct packed_commit_list commits;
struct hashfile *f;
uint32_t i, count_distinct = 0;
char *graph_name;
- int fd;
struct lock_file lk = LOCK_INIT;
uint32_t chunk_ids[5];
uint64_t chunk_offsets[5];
oids.nr = 0;
oids.alloc = approximate_object_count() / 4;
+ if (append) {
+ prepare_commit_graph_one(obj_dir);
+ if (commit_graph)
+ oids.alloc += commit_graph->num_commits;
+ }
+
if (oids.alloc < 1024)
oids.alloc = 1024;
ALLOC_ARRAY(oids.list, oids.alloc);
- for_each_packed_object(add_packed_commits, &oids, 0);
+ if (append && commit_graph) {
+ for (i = 0; i < commit_graph->num_commits; i++) {
+ const unsigned char *hash = commit_graph->chunk_oid_lookup +
+ commit_graph->hash_len * i;
+ hashcpy(oids.list[oids.nr++].hash, hash);
+ }
+ }
+
+ if (pack_indexes) {
+ struct strbuf packname = STRBUF_INIT;
+ int dirlen;
+ strbuf_addf(&packname, "%s/pack/", obj_dir);
+ dirlen = packname.len;
+ for (i = 0; i < nr_packs; i++) {
+ struct packed_git *p;
+ strbuf_setlen(&packname, dirlen);
+ strbuf_addstr(&packname, pack_indexes[i]);
+ p = add_packed_git(packname.buf, packname.len, 1);
+ if (!p)
+ die(_("error adding pack %s"), packname.buf);
+ if (open_pack_index(p))
+ die(_("error opening index for %s"), packname.buf);
+ for_each_object_in_pack(p, add_packed_commits, &oids);
+ close_pack(p);
+ }
+ strbuf_release(&packname);
+ }
+
+ if (commit_hex) {
+ for (i = 0; i < nr_commits; i++) {
+ const char *end;
+ struct object_id oid;
+ struct commit *result;
+
+ if (commit_hex[i] && parse_oid_hex(commit_hex[i], &oid, &end))
+ continue;
+
+ result = lookup_commit_reference_gently(&oid, 1);
+
+ if (result) {
+ ALLOC_GROW(oids.list, oids.nr + 1, oids.alloc);
+ oidcpy(&oids.list[oids.nr], &(result->object.oid));
+ oids.nr++;
+ }
+ }
+ }
+
+ if (!pack_indexes && !commit_hex)
+ for_each_packed_object(add_packed_commits, &oids, 0);
+
close_reachable(&oids);
QSORT(oids.list, oids.nr, commit_compare);
if (commits.nr >= GRAPH_PARENT_MISSING)
die(_("too many commits to write graph"));
- graph_name = get_commit_graph_filename(obj_dir);
- fd = hold_lock_file_for_update(&lk, graph_name, 0);
+ compute_generation_numbers(&commits);
- if (fd < 0) {
- struct strbuf folder = STRBUF_INIT;
- strbuf_addstr(&folder, graph_name);
- strbuf_setlen(&folder, strrchr(folder.buf, '/') - folder.buf);
-
- if (mkdir(folder.buf, 0777) < 0)
- die_errno(_("cannot mkdir %s"), folder.buf);
- strbuf_release(&folder);
-
- fd = hold_lock_file_for_update(&lk, graph_name, LOCK_DIE_ON_ERROR);
-
- if (fd < 0)
- die_errno("unable to create '%s'", graph_name);
- }
+ graph_name = get_commit_graph_filename(obj_dir);
+ if (safe_create_leading_directories(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);
write_graph_chunk_data(f, GRAPH_OID_LEN, commits.list, commits.nr);
write_graph_chunk_large_edges(f, commits.list, commits.nr);
+ close_commit_graph();
finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC);
commit_lock_file(&lk);