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https://github.com/git/git
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896833b268
Code cleanup. * tb/shallow-cleanup: shallow: use struct 'shallow_lock' for additional safety shallow.h: document '{commit,rollback}_shallow_file' shallow: extract a header file for shallow-related functions commit: make 'commit_graft_pos' non-static
2359 lines
61 KiB
C
2359 lines
61 KiB
C
#include "cache.h"
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#include "config.h"
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#include "dir.h"
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#include "git-compat-util.h"
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#include "lockfile.h"
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#include "pack.h"
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#include "packfile.h"
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#include "commit.h"
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#include "object.h"
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#include "refs.h"
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#include "revision.h"
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#include "sha1-lookup.h"
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#include "commit-graph.h"
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#include "object-store.h"
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#include "alloc.h"
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#include "hashmap.h"
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#include "replace-object.h"
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#include "progress.h"
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#include "bloom.h"
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#include "commit-slab.h"
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#include "shallow.h"
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void git_test_write_commit_graph_or_die(void)
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{
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int flags = 0;
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if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0))
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return;
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if (git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0))
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flags = COMMIT_GRAPH_WRITE_BLOOM_FILTERS;
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if (write_commit_graph_reachable(the_repository->objects->odb,
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flags, NULL))
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die("failed to write commit-graph under GIT_TEST_COMMIT_GRAPH");
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}
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#define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
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#define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
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#define GRAPH_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */
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#define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */
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#define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */
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#define GRAPH_CHUNKID_BLOOMINDEXES 0x42494458 /* "BIDX" */
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#define GRAPH_CHUNKID_BLOOMDATA 0x42444154 /* "BDAT" */
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#define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */
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#define MAX_NUM_CHUNKS 7
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#define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16)
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#define GRAPH_VERSION_1 0x1
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#define GRAPH_VERSION GRAPH_VERSION_1
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#define GRAPH_EXTRA_EDGES_NEEDED 0x80000000
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#define GRAPH_EDGE_LAST_MASK 0x7fffffff
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#define GRAPH_PARENT_NONE 0x70000000
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#define GRAPH_LAST_EDGE 0x80000000
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#define GRAPH_HEADER_SIZE 8
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#define GRAPH_FANOUT_SIZE (4 * 256)
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#define GRAPH_CHUNKLOOKUP_WIDTH 12
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#define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \
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+ GRAPH_FANOUT_SIZE + the_hash_algo->rawsz)
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/* Remember to update object flag allocation in object.h */
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#define REACHABLE (1u<<15)
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/* Keep track of the order in which commits are added to our list. */
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define_commit_slab(commit_pos, int);
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static struct commit_pos commit_pos = COMMIT_SLAB_INIT(1, commit_pos);
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static void set_commit_pos(struct repository *r, const struct object_id *oid)
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{
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static int32_t max_pos;
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struct commit *commit = lookup_commit(r, oid);
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if (!commit)
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return; /* should never happen, but be lenient */
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*commit_pos_at(&commit_pos, commit) = max_pos++;
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}
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static int commit_pos_cmp(const void *va, const void *vb)
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{
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const struct commit *a = *(const struct commit **)va;
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const struct commit *b = *(const struct commit **)vb;
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return commit_pos_at(&commit_pos, a) -
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commit_pos_at(&commit_pos, b);
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}
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static int commit_gen_cmp(const void *va, const void *vb)
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{
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const struct commit *a = *(const struct commit **)va;
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const struct commit *b = *(const struct commit **)vb;
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/* lower generation commits first */
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if (a->generation < b->generation)
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return -1;
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else if (a->generation > b->generation)
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return 1;
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/* use date as a heuristic when generations are equal */
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if (a->date < b->date)
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return -1;
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else if (a->date > b->date)
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return 1;
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return 0;
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}
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char *get_commit_graph_filename(struct object_directory *obj_dir)
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{
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return xstrfmt("%s/info/commit-graph", obj_dir->path);
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}
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static char *get_split_graph_filename(struct object_directory *odb,
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const char *oid_hex)
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{
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return xstrfmt("%s/info/commit-graphs/graph-%s.graph", odb->path,
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oid_hex);
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}
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static char *get_chain_filename(struct object_directory *odb)
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{
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return xstrfmt("%s/info/commit-graphs/commit-graph-chain", odb->path);
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}
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static uint8_t oid_version(void)
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{
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return 1;
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}
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static struct commit_graph *alloc_commit_graph(void)
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{
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struct commit_graph *g = xcalloc(1, sizeof(*g));
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return g;
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}
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extern int read_replace_refs;
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static int commit_graph_compatible(struct repository *r)
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{
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if (!r->gitdir)
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return 0;
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if (read_replace_refs) {
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prepare_replace_object(r);
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if (hashmap_get_size(&r->objects->replace_map->map))
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return 0;
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}
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prepare_commit_graft(r);
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if (r->parsed_objects && r->parsed_objects->grafts_nr)
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return 0;
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if (is_repository_shallow(r))
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return 0;
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return 1;
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}
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int open_commit_graph(const char *graph_file, int *fd, struct stat *st)
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{
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*fd = git_open(graph_file);
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if (*fd < 0)
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return 0;
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if (fstat(*fd, st)) {
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close(*fd);
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return 0;
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}
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return 1;
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}
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struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st,
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struct object_directory *odb)
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{
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void *graph_map;
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size_t graph_size;
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struct commit_graph *ret;
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graph_size = xsize_t(st->st_size);
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if (graph_size < GRAPH_MIN_SIZE) {
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close(fd);
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error(_("commit-graph file is too small"));
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return NULL;
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}
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graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0);
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close(fd);
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ret = parse_commit_graph(graph_map, graph_size);
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if (ret)
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ret->odb = odb;
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else
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munmap(graph_map, graph_size);
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return ret;
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}
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static int verify_commit_graph_lite(struct commit_graph *g)
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{
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/*
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* Basic validation shared between parse_commit_graph()
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* which'll be called every time the graph is used, and the
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* much more expensive verify_commit_graph() used by
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* "commit-graph verify".
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*
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* There should only be very basic checks here to ensure that
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* we don't e.g. segfault in fill_commit_in_graph(), but
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* because this is a very hot codepath nothing that e.g. loops
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* over g->num_commits, or runs a checksum on the commit-graph
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* itself.
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*/
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if (!g->chunk_oid_fanout) {
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error("commit-graph is missing the OID Fanout chunk");
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return 1;
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}
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if (!g->chunk_oid_lookup) {
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error("commit-graph is missing the OID Lookup chunk");
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return 1;
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}
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if (!g->chunk_commit_data) {
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error("commit-graph is missing the Commit Data chunk");
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return 1;
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}
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return 0;
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}
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struct commit_graph *parse_commit_graph(void *graph_map, size_t graph_size)
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{
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const unsigned char *data, *chunk_lookup;
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uint32_t i;
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struct commit_graph *graph;
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uint64_t last_chunk_offset;
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uint32_t last_chunk_id;
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uint32_t graph_signature;
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unsigned char graph_version, hash_version;
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if (!graph_map)
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return NULL;
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if (graph_size < GRAPH_MIN_SIZE)
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return NULL;
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data = (const unsigned char *)graph_map;
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graph_signature = get_be32(data);
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if (graph_signature != GRAPH_SIGNATURE) {
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error(_("commit-graph signature %X does not match signature %X"),
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graph_signature, GRAPH_SIGNATURE);
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return NULL;
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}
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graph_version = *(unsigned char*)(data + 4);
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if (graph_version != GRAPH_VERSION) {
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error(_("commit-graph version %X does not match version %X"),
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graph_version, GRAPH_VERSION);
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return NULL;
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}
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hash_version = *(unsigned char*)(data + 5);
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if (hash_version != oid_version()) {
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error(_("commit-graph hash version %X does not match version %X"),
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hash_version, oid_version());
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return NULL;
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}
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graph = alloc_commit_graph();
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graph->hash_len = the_hash_algo->rawsz;
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graph->num_chunks = *(unsigned char*)(data + 6);
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graph->data = graph_map;
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graph->data_len = graph_size;
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last_chunk_id = 0;
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last_chunk_offset = 8;
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chunk_lookup = data + 8;
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for (i = 0; i < graph->num_chunks; i++) {
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uint32_t chunk_id;
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uint64_t chunk_offset;
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int chunk_repeated = 0;
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if (data + graph_size - chunk_lookup <
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GRAPH_CHUNKLOOKUP_WIDTH) {
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error(_("commit-graph chunk lookup table entry missing; file may be incomplete"));
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goto free_and_return;
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}
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chunk_id = get_be32(chunk_lookup + 0);
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chunk_offset = get_be64(chunk_lookup + 4);
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chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH;
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if (chunk_offset > graph_size - the_hash_algo->rawsz) {
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error(_("commit-graph improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32),
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(uint32_t)chunk_offset);
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goto free_and_return;
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}
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switch (chunk_id) {
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case GRAPH_CHUNKID_OIDFANOUT:
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if (graph->chunk_oid_fanout)
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chunk_repeated = 1;
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else
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graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset);
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break;
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case GRAPH_CHUNKID_OIDLOOKUP:
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if (graph->chunk_oid_lookup)
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chunk_repeated = 1;
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else
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graph->chunk_oid_lookup = data + chunk_offset;
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break;
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case GRAPH_CHUNKID_DATA:
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if (graph->chunk_commit_data)
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chunk_repeated = 1;
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else
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graph->chunk_commit_data = data + chunk_offset;
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break;
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case GRAPH_CHUNKID_EXTRAEDGES:
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if (graph->chunk_extra_edges)
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chunk_repeated = 1;
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else
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graph->chunk_extra_edges = data + chunk_offset;
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break;
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case GRAPH_CHUNKID_BASE:
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if (graph->chunk_base_graphs)
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chunk_repeated = 1;
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else
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graph->chunk_base_graphs = data + chunk_offset;
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break;
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case GRAPH_CHUNKID_BLOOMINDEXES:
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if (graph->chunk_bloom_indexes)
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chunk_repeated = 1;
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else
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graph->chunk_bloom_indexes = data + chunk_offset;
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break;
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case GRAPH_CHUNKID_BLOOMDATA:
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if (graph->chunk_bloom_data)
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chunk_repeated = 1;
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else {
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uint32_t hash_version;
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graph->chunk_bloom_data = data + chunk_offset;
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hash_version = get_be32(data + chunk_offset);
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if (hash_version != 1)
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break;
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graph->bloom_filter_settings = xmalloc(sizeof(struct bloom_filter_settings));
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graph->bloom_filter_settings->hash_version = hash_version;
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graph->bloom_filter_settings->num_hashes = get_be32(data + chunk_offset + 4);
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graph->bloom_filter_settings->bits_per_entry = get_be32(data + chunk_offset + 8);
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}
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break;
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}
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if (chunk_repeated) {
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error(_("commit-graph chunk id %08x appears multiple times"), chunk_id);
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goto free_and_return;
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}
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if (last_chunk_id == GRAPH_CHUNKID_OIDLOOKUP)
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{
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graph->num_commits = (chunk_offset - last_chunk_offset)
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/ graph->hash_len;
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}
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last_chunk_id = chunk_id;
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last_chunk_offset = chunk_offset;
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}
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if (graph->chunk_bloom_indexes && graph->chunk_bloom_data) {
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init_bloom_filters();
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} else {
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/* We need both the bloom chunks to exist together. Else ignore the data */
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graph->chunk_bloom_indexes = NULL;
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graph->chunk_bloom_data = NULL;
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FREE_AND_NULL(graph->bloom_filter_settings);
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}
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hashcpy(graph->oid.hash, graph->data + graph->data_len - graph->hash_len);
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if (verify_commit_graph_lite(graph))
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goto free_and_return;
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return graph;
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free_and_return:
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free(graph->bloom_filter_settings);
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free(graph);
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return NULL;
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}
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static struct commit_graph *load_commit_graph_one(const char *graph_file,
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struct object_directory *odb)
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{
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struct stat st;
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int fd;
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struct commit_graph *g;
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int open_ok = open_commit_graph(graph_file, &fd, &st);
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if (!open_ok)
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return NULL;
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g = load_commit_graph_one_fd_st(fd, &st, odb);
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if (g)
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g->filename = xstrdup(graph_file);
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return g;
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}
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static struct commit_graph *load_commit_graph_v1(struct repository *r,
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struct object_directory *odb)
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{
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char *graph_name = get_commit_graph_filename(odb);
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struct commit_graph *g = load_commit_graph_one(graph_name, odb);
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free(graph_name);
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return g;
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}
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static int add_graph_to_chain(struct commit_graph *g,
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struct commit_graph *chain,
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struct object_id *oids,
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int n)
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{
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struct commit_graph *cur_g = chain;
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if (n && !g->chunk_base_graphs) {
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warning(_("commit-graph has no base graphs chunk"));
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return 0;
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}
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while (n) {
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n--;
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if (!cur_g ||
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!oideq(&oids[n], &cur_g->oid) ||
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!hasheq(oids[n].hash, g->chunk_base_graphs + g->hash_len * n)) {
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warning(_("commit-graph chain does not match"));
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return 0;
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}
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cur_g = cur_g->base_graph;
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}
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g->base_graph = chain;
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if (chain)
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g->num_commits_in_base = chain->num_commits + chain->num_commits_in_base;
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return 1;
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}
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static struct commit_graph *load_commit_graph_chain(struct repository *r,
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struct object_directory *odb)
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{
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struct commit_graph *graph_chain = NULL;
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struct strbuf line = STRBUF_INIT;
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struct stat st;
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struct object_id *oids;
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int i = 0, valid = 1, count;
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char *chain_name = get_chain_filename(odb);
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FILE *fp;
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int stat_res;
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fp = fopen(chain_name, "r");
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stat_res = stat(chain_name, &st);
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free(chain_name);
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if (!fp ||
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stat_res ||
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st.st_size <= the_hash_algo->hexsz)
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return NULL;
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count = st.st_size / (the_hash_algo->hexsz + 1);
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oids = xcalloc(count, sizeof(struct object_id));
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prepare_alt_odb(r);
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for (i = 0; i < count; i++) {
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struct object_directory *odb;
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|
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if (strbuf_getline_lf(&line, fp) == EOF)
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break;
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if (get_oid_hex(line.buf, &oids[i])) {
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warning(_("invalid commit-graph chain: line '%s' not a hash"),
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line.buf);
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valid = 0;
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break;
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}
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valid = 0;
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for (odb = r->objects->odb; odb; odb = odb->next) {
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char *graph_name = get_split_graph_filename(odb, line.buf);
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struct commit_graph *g = load_commit_graph_one(graph_name, odb);
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free(graph_name);
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if (g) {
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if (add_graph_to_chain(g, graph_chain, oids, i)) {
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graph_chain = g;
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valid = 1;
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}
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break;
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}
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}
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|
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if (!valid) {
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warning(_("unable to find all commit-graph files"));
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break;
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}
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}
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|
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free(oids);
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fclose(fp);
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strbuf_release(&line);
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return graph_chain;
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}
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|
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struct commit_graph *read_commit_graph_one(struct repository *r,
|
|
struct object_directory *odb)
|
|
{
|
|
struct commit_graph *g = load_commit_graph_v1(r, odb);
|
|
|
|
if (!g)
|
|
g = load_commit_graph_chain(r, odb);
|
|
|
|
return g;
|
|
}
|
|
|
|
static void prepare_commit_graph_one(struct repository *r,
|
|
struct object_directory *odb)
|
|
{
|
|
|
|
if (r->objects->commit_graph)
|
|
return;
|
|
|
|
r->objects->commit_graph = read_commit_graph_one(r, odb);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if commit_graph is non-NULL, and 0 otherwise.
|
|
*
|
|
* On the first invocation, this function attempts to load the commit
|
|
* graph if the_repository is configured to have one.
|
|
*/
|
|
static int prepare_commit_graph(struct repository *r)
|
|
{
|
|
struct object_directory *odb;
|
|
|
|
/*
|
|
* This must come before the "already attempted?" check below, because
|
|
* we want to disable even an already-loaded graph file.
|
|
*/
|
|
if (r->commit_graph_disabled)
|
|
return 0;
|
|
|
|
if (r->objects->commit_graph_attempted)
|
|
return !!r->objects->commit_graph;
|
|
r->objects->commit_graph_attempted = 1;
|
|
|
|
if (git_env_bool(GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD, 0))
|
|
die("dying as requested by the '%s' variable on commit-graph load!",
|
|
GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD);
|
|
|
|
prepare_repo_settings(r);
|
|
|
|
if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) &&
|
|
r->settings.core_commit_graph != 1)
|
|
/*
|
|
* This repository is not configured to use commit graphs, so
|
|
* do not load one. (But report commit_graph_attempted anyway
|
|
* so that commit graph loading is not attempted again for this
|
|
* repository.)
|
|
*/
|
|
return 0;
|
|
|
|
if (!commit_graph_compatible(r))
|
|
return 0;
|
|
|
|
prepare_alt_odb(r);
|
|
for (odb = r->objects->odb;
|
|
!r->objects->commit_graph && odb;
|
|
odb = odb->next)
|
|
prepare_commit_graph_one(r, odb);
|
|
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;
|
|
}
|
|
|
|
static void close_commit_graph_one(struct commit_graph *g)
|
|
{
|
|
if (!g)
|
|
return;
|
|
|
|
close_commit_graph_one(g->base_graph);
|
|
free_commit_graph(g);
|
|
}
|
|
|
|
void close_commit_graph(struct raw_object_store *o)
|
|
{
|
|
close_commit_graph_one(o->commit_graph);
|
|
o->commit_graph = NULL;
|
|
}
|
|
|
|
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 void load_oid_from_graph(struct commit_graph *g,
|
|
uint32_t pos,
|
|
struct object_id *oid)
|
|
{
|
|
uint32_t lex_index;
|
|
|
|
while (g && pos < g->num_commits_in_base)
|
|
g = g->base_graph;
|
|
|
|
if (!g)
|
|
BUG("NULL commit-graph");
|
|
|
|
if (pos >= g->num_commits + g->num_commits_in_base)
|
|
die(_("invalid commit position. commit-graph is likely corrupt"));
|
|
|
|
lex_index = pos - g->num_commits_in_base;
|
|
|
|
hashcpy(oid->hash, g->chunk_oid_lookup + g->hash_len * lex_index);
|
|
}
|
|
|
|
static struct commit_list **insert_parent_or_die(struct repository *r,
|
|
struct commit_graph *g,
|
|
uint32_t pos,
|
|
struct commit_list **pptr)
|
|
{
|
|
struct commit *c;
|
|
struct object_id oid;
|
|
|
|
if (pos >= g->num_commits + g->num_commits_in_base)
|
|
die("invalid parent position %"PRIu32, pos);
|
|
|
|
load_oid_from_graph(g, pos, &oid);
|
|
c = lookup_commit(r, &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;
|
|
uint32_t lex_index;
|
|
|
|
while (pos < g->num_commits_in_base)
|
|
g = g->base_graph;
|
|
|
|
lex_index = pos - g->num_commits_in_base;
|
|
commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * lex_index;
|
|
item->graph_pos = pos;
|
|
item->generation = get_be32(commit_data + g->hash_len + 8) >> 2;
|
|
}
|
|
|
|
static inline void set_commit_tree(struct commit *c, struct tree *t)
|
|
{
|
|
c->maybe_tree = t;
|
|
}
|
|
|
|
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;
|
|
uint64_t date_low, date_high;
|
|
struct commit_list **pptr;
|
|
const unsigned char *commit_data;
|
|
uint32_t lex_index;
|
|
|
|
while (pos < g->num_commits_in_base)
|
|
g = g->base_graph;
|
|
|
|
if (pos >= g->num_commits + g->num_commits_in_base)
|
|
die(_("invalid commit position. commit-graph is likely corrupt"));
|
|
|
|
/*
|
|
* Store the "full" position, but then use the
|
|
* "local" position for the rest of the calculation.
|
|
*/
|
|
item->graph_pos = pos;
|
|
lex_index = pos - g->num_commits_in_base;
|
|
|
|
commit_data = g->chunk_commit_data + (g->hash_len + 16) * lex_index;
|
|
|
|
item->object.parsed = 1;
|
|
|
|
set_commit_tree(item, 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(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_EXTRA_EDGES_NEEDED)) {
|
|
pptr = insert_parent_or_die(r, g, edge_value, pptr);
|
|
return 1;
|
|
}
|
|
|
|
parent_data_ptr = (uint32_t*)(g->chunk_extra_edges +
|
|
4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK));
|
|
do {
|
|
edge_value = get_be32(parent_data_ptr);
|
|
pptr = insert_parent_or_die(r, 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 {
|
|
struct commit_graph *cur_g = g;
|
|
uint32_t lex_index;
|
|
|
|
while (cur_g && !bsearch_graph(cur_g, &(item->object.oid), &lex_index))
|
|
cur_g = cur_g->base_graph;
|
|
|
|
if (cur_g) {
|
|
*pos = lex_index + cur_g->num_commits_in_base;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int parse_commit_in_graph_one(struct repository *r,
|
|
struct commit_graph *g,
|
|
struct commit *item)
|
|
{
|
|
uint32_t pos;
|
|
|
|
if (item->object.parsed)
|
|
return 1;
|
|
|
|
if (find_commit_in_graph(item, g, &pos))
|
|
return fill_commit_in_graph(r, item, g, pos);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int parse_commit_in_graph(struct repository *r, struct commit *item)
|
|
{
|
|
if (!prepare_commit_graph(r))
|
|
return 0;
|
|
return parse_commit_in_graph_one(r, r->objects->commit_graph, item);
|
|
}
|
|
|
|
void load_commit_graph_info(struct repository *r, struct commit *item)
|
|
{
|
|
uint32_t pos;
|
|
if (!prepare_commit_graph(r))
|
|
return;
|
|
if (find_commit_in_graph(item, r->objects->commit_graph, &pos))
|
|
fill_commit_graph_info(item, r->objects->commit_graph, pos);
|
|
}
|
|
|
|
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;
|
|
|
|
while (c->graph_pos < g->num_commits_in_base)
|
|
g = g->base_graph;
|
|
|
|
commit_data = g->chunk_commit_data +
|
|
GRAPH_DATA_WIDTH * (c->graph_pos - g->num_commits_in_base);
|
|
|
|
hashcpy(oid.hash, commit_data);
|
|
set_commit_tree(c, lookup_tree(r, &oid));
|
|
|
|
return c->maybe_tree;
|
|
}
|
|
|
|
static struct tree *get_commit_tree_in_graph_one(struct repository *r,
|
|
struct commit_graph *g,
|
|
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_one called from non-commit-graph commit");
|
|
|
|
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, r->objects->commit_graph, c);
|
|
}
|
|
|
|
struct packed_commit_list {
|
|
struct commit **list;
|
|
int nr;
|
|
int alloc;
|
|
};
|
|
|
|
struct packed_oid_list {
|
|
struct object_id *list;
|
|
int nr;
|
|
int alloc;
|
|
};
|
|
|
|
struct write_commit_graph_context {
|
|
struct repository *r;
|
|
struct object_directory *odb;
|
|
char *graph_name;
|
|
struct packed_oid_list oids;
|
|
struct packed_commit_list commits;
|
|
int num_extra_edges;
|
|
unsigned long approx_nr_objects;
|
|
struct progress *progress;
|
|
int progress_done;
|
|
uint64_t progress_cnt;
|
|
|
|
char *base_graph_name;
|
|
int num_commit_graphs_before;
|
|
int num_commit_graphs_after;
|
|
char **commit_graph_filenames_before;
|
|
char **commit_graph_filenames_after;
|
|
char **commit_graph_hash_after;
|
|
uint32_t new_num_commits_in_base;
|
|
struct commit_graph *new_base_graph;
|
|
|
|
unsigned append:1,
|
|
report_progress:1,
|
|
split:1,
|
|
check_oids:1,
|
|
changed_paths:1,
|
|
order_by_pack:1;
|
|
|
|
const struct split_commit_graph_opts *split_opts;
|
|
size_t total_bloom_filter_data_size;
|
|
};
|
|
|
|
static void write_graph_chunk_fanout(struct hashfile *f,
|
|
struct write_commit_graph_context *ctx)
|
|
{
|
|
int i, count = 0;
|
|
struct commit **list = ctx->commits.list;
|
|
|
|
/*
|
|
* Write the first-level table (the list is sorted,
|
|
* but we use a 256-entry lookup to be able to avoid
|
|
* having to do eight extra binary search iterations).
|
|
*/
|
|
for (i = 0; i < 256; i++) {
|
|
while (count < ctx->commits.nr) {
|
|
if ((*list)->object.oid.hash[0] != i)
|
|
break;
|
|
display_progress(ctx->progress, ++ctx->progress_cnt);
|
|
count++;
|
|
list++;
|
|
}
|
|
|
|
hashwrite_be32(f, count);
|
|
}
|
|
}
|
|
|
|
static void write_graph_chunk_oids(struct hashfile *f, int hash_len,
|
|
struct write_commit_graph_context *ctx)
|
|
{
|
|
struct commit **list = ctx->commits.list;
|
|
int count;
|
|
for (count = 0; count < ctx->commits.nr; count++, list++) {
|
|
display_progress(ctx->progress, ++ctx->progress_cnt);
|
|
hashwrite(f, (*list)->object.oid.hash, (int)hash_len);
|
|
}
|
|
}
|
|
|
|
static const unsigned char *commit_to_sha1(size_t index, void *table)
|
|
{
|
|
struct commit **commits = table;
|
|
return commits[index]->object.oid.hash;
|
|
}
|
|
|
|
static void write_graph_chunk_data(struct hashfile *f, int hash_len,
|
|
struct write_commit_graph_context *ctx)
|
|
{
|
|
struct commit **list = ctx->commits.list;
|
|
struct commit **last = ctx->commits.list + ctx->commits.nr;
|
|
uint32_t num_extra_edges = 0;
|
|
|
|
while (list < last) {
|
|
struct commit_list *parent;
|
|
struct object_id *tree;
|
|
int edge_value;
|
|
uint32_t packedDate[2];
|
|
display_progress(ctx->progress, ++ctx->progress_cnt);
|
|
|
|
if (parse_commit_no_graph(*list))
|
|
die(_("unable to parse commit %s"),
|
|
oid_to_hex(&(*list)->object.oid));
|
|
tree = get_commit_tree_oid(*list);
|
|
hashwrite(f, tree->hash, hash_len);
|
|
|
|
parent = (*list)->parents;
|
|
|
|
if (!parent)
|
|
edge_value = GRAPH_PARENT_NONE;
|
|
else {
|
|
edge_value = sha1_pos(parent->item->object.oid.hash,
|
|
ctx->commits.list,
|
|
ctx->commits.nr,
|
|
commit_to_sha1);
|
|
|
|
if (edge_value >= 0)
|
|
edge_value += ctx->new_num_commits_in_base;
|
|
else if (ctx->new_base_graph) {
|
|
uint32_t pos;
|
|
if (find_commit_in_graph(parent->item,
|
|
ctx->new_base_graph,
|
|
&pos))
|
|
edge_value = pos;
|
|
}
|
|
|
|
if (edge_value < 0)
|
|
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);
|
|
|
|
if (parent)
|
|
parent = parent->next;
|
|
|
|
if (!parent)
|
|
edge_value = GRAPH_PARENT_NONE;
|
|
else if (parent->next)
|
|
edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges;
|
|
else {
|
|
edge_value = sha1_pos(parent->item->object.oid.hash,
|
|
ctx->commits.list,
|
|
ctx->commits.nr,
|
|
commit_to_sha1);
|
|
|
|
if (edge_value >= 0)
|
|
edge_value += ctx->new_num_commits_in_base;
|
|
else if (ctx->new_base_graph) {
|
|
uint32_t pos;
|
|
if (find_commit_in_graph(parent->item,
|
|
ctx->new_base_graph,
|
|
&pos))
|
|
edge_value = pos;
|
|
}
|
|
|
|
if (edge_value < 0)
|
|
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);
|
|
|
|
if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) {
|
|
do {
|
|
num_extra_edges++;
|
|
parent = parent->next;
|
|
} while (parent);
|
|
}
|
|
|
|
if (sizeof((*list)->date) > 4)
|
|
packedDate[0] = htonl(((*list)->date >> 32) & 0x3);
|
|
else
|
|
packedDate[0] = 0;
|
|
|
|
packedDate[0] |= htonl((*list)->generation << 2);
|
|
|
|
packedDate[1] = htonl((*list)->date);
|
|
hashwrite(f, packedDate, 8);
|
|
|
|
list++;
|
|
}
|
|
}
|
|
|
|
static void write_graph_chunk_extra_edges(struct hashfile *f,
|
|
struct write_commit_graph_context *ctx)
|
|
{
|
|
struct commit **list = ctx->commits.list;
|
|
struct commit **last = ctx->commits.list + ctx->commits.nr;
|
|
struct commit_list *parent;
|
|
|
|
while (list < last) {
|
|
int num_parents = 0;
|
|
|
|
display_progress(ctx->progress, ++ctx->progress_cnt);
|
|
|
|
for (parent = (*list)->parents; num_parents < 3 && parent;
|
|
parent = parent->next)
|
|
num_parents++;
|
|
|
|
if (num_parents <= 2) {
|
|
list++;
|
|
continue;
|
|
}
|
|
|
|
/* Since num_parents > 2, this initializer is safe. */
|
|
for (parent = (*list)->parents->next; parent; parent = parent->next) {
|
|
int edge_value = sha1_pos(parent->item->object.oid.hash,
|
|
ctx->commits.list,
|
|
ctx->commits.nr,
|
|
commit_to_sha1);
|
|
|
|
if (edge_value >= 0)
|
|
edge_value += ctx->new_num_commits_in_base;
|
|
else if (ctx->new_base_graph) {
|
|
uint32_t pos;
|
|
if (find_commit_in_graph(parent->item,
|
|
ctx->new_base_graph,
|
|
&pos))
|
|
edge_value = pos;
|
|
}
|
|
|
|
if (edge_value < 0)
|
|
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;
|
|
|
|
hashwrite_be32(f, edge_value);
|
|
}
|
|
|
|
list++;
|
|
}
|
|
}
|
|
|
|
static void write_graph_chunk_bloom_indexes(struct hashfile *f,
|
|
struct write_commit_graph_context *ctx)
|
|
{
|
|
struct commit **list = ctx->commits.list;
|
|
struct commit **last = ctx->commits.list + ctx->commits.nr;
|
|
uint32_t cur_pos = 0;
|
|
struct progress *progress = NULL;
|
|
int i = 0;
|
|
|
|
if (ctx->report_progress)
|
|
progress = start_delayed_progress(
|
|
_("Writing changed paths Bloom filters index"),
|
|
ctx->commits.nr);
|
|
|
|
while (list < last) {
|
|
struct bloom_filter *filter = get_bloom_filter(ctx->r, *list, 0);
|
|
cur_pos += filter->len;
|
|
display_progress(progress, ++i);
|
|
hashwrite_be32(f, cur_pos);
|
|
list++;
|
|
}
|
|
|
|
stop_progress(&progress);
|
|
}
|
|
|
|
static void write_graph_chunk_bloom_data(struct hashfile *f,
|
|
struct write_commit_graph_context *ctx,
|
|
const struct bloom_filter_settings *settings)
|
|
{
|
|
struct commit **list = ctx->commits.list;
|
|
struct commit **last = ctx->commits.list + ctx->commits.nr;
|
|
struct progress *progress = NULL;
|
|
int i = 0;
|
|
|
|
if (ctx->report_progress)
|
|
progress = start_delayed_progress(
|
|
_("Writing changed paths Bloom filters data"),
|
|
ctx->commits.nr);
|
|
|
|
hashwrite_be32(f, settings->hash_version);
|
|
hashwrite_be32(f, settings->num_hashes);
|
|
hashwrite_be32(f, settings->bits_per_entry);
|
|
|
|
while (list < last) {
|
|
struct bloom_filter *filter = get_bloom_filter(ctx->r, *list, 0);
|
|
display_progress(progress, ++i);
|
|
hashwrite(f, filter->data, filter->len * sizeof(unsigned char));
|
|
list++;
|
|
}
|
|
|
|
stop_progress(&progress);
|
|
}
|
|
|
|
static int oid_compare(const void *_a, const void *_b)
|
|
{
|
|
const struct object_id *a = (const struct object_id *)_a;
|
|
const struct object_id *b = (const struct object_id *)_b;
|
|
return oidcmp(a, b);
|
|
}
|
|
|
|
static int add_packed_commits(const struct object_id *oid,
|
|
struct packed_git *pack,
|
|
uint32_t pos,
|
|
void *data)
|
|
{
|
|
struct write_commit_graph_context *ctx = (struct write_commit_graph_context*)data;
|
|
enum object_type type;
|
|
off_t offset = nth_packed_object_offset(pack, pos);
|
|
struct object_info oi = OBJECT_INFO_INIT;
|
|
|
|
if (ctx->progress)
|
|
display_progress(ctx->progress, ++ctx->progress_done);
|
|
|
|
oi.typep = &type;
|
|
if (packed_object_info(ctx->r, pack, offset, &oi) < 0)
|
|
die(_("unable to get type of object %s"), oid_to_hex(oid));
|
|
|
|
if (type != OBJ_COMMIT)
|
|
return 0;
|
|
|
|
ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc);
|
|
oidcpy(&(ctx->oids.list[ctx->oids.nr]), oid);
|
|
ctx->oids.nr++;
|
|
|
|
set_commit_pos(ctx->r, oid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void add_missing_parents(struct write_commit_graph_context *ctx, struct commit *commit)
|
|
{
|
|
struct commit_list *parent;
|
|
for (parent = commit->parents; parent; parent = parent->next) {
|
|
if (!(parent->item->object.flags & REACHABLE)) {
|
|
ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc);
|
|
oidcpy(&ctx->oids.list[ctx->oids.nr], &(parent->item->object.oid));
|
|
ctx->oids.nr++;
|
|
parent->item->object.flags |= REACHABLE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void close_reachable(struct write_commit_graph_context *ctx)
|
|
{
|
|
int i;
|
|
struct commit *commit;
|
|
enum commit_graph_split_flags flags = ctx->split_opts ?
|
|
ctx->split_opts->flags : COMMIT_GRAPH_SPLIT_UNSPECIFIED;
|
|
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Loading known commits in commit graph"),
|
|
ctx->oids.nr);
|
|
for (i = 0; i < ctx->oids.nr; i++) {
|
|
display_progress(ctx->progress, i + 1);
|
|
commit = lookup_commit(ctx->r, &ctx->oids.list[i]);
|
|
if (commit)
|
|
commit->object.flags |= REACHABLE;
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
|
|
/*
|
|
* As this loop runs, ctx->oids.nr may grow, but not more
|
|
* than the number of missing commits in the reachable
|
|
* closure.
|
|
*/
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Expanding reachable commits in commit graph"),
|
|
0);
|
|
for (i = 0; i < ctx->oids.nr; i++) {
|
|
display_progress(ctx->progress, i + 1);
|
|
commit = lookup_commit(ctx->r, &ctx->oids.list[i]);
|
|
|
|
if (!commit)
|
|
continue;
|
|
if (ctx->split) {
|
|
if ((!parse_commit(commit) &&
|
|
commit->graph_pos == COMMIT_NOT_FROM_GRAPH) ||
|
|
flags == COMMIT_GRAPH_SPLIT_REPLACE)
|
|
add_missing_parents(ctx, commit);
|
|
} else if (!parse_commit_no_graph(commit))
|
|
add_missing_parents(ctx, commit);
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Clearing commit marks in commit graph"),
|
|
ctx->oids.nr);
|
|
for (i = 0; i < ctx->oids.nr; i++) {
|
|
display_progress(ctx->progress, i + 1);
|
|
commit = lookup_commit(ctx->r, &ctx->oids.list[i]);
|
|
|
|
if (commit)
|
|
commit->object.flags &= ~REACHABLE;
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
}
|
|
|
|
static void compute_generation_numbers(struct write_commit_graph_context *ctx)
|
|
{
|
|
int i;
|
|
struct commit_list *list = NULL;
|
|
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Computing commit graph generation numbers"),
|
|
ctx->commits.nr);
|
|
for (i = 0; i < ctx->commits.nr; i++) {
|
|
display_progress(ctx->progress, i + 1);
|
|
if (ctx->commits.list[i]->generation != GENERATION_NUMBER_INFINITY &&
|
|
ctx->commits.list[i]->generation != GENERATION_NUMBER_ZERO)
|
|
continue;
|
|
|
|
commit_list_insert(ctx->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;
|
|
}
|
|
}
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
}
|
|
|
|
static void compute_bloom_filters(struct write_commit_graph_context *ctx)
|
|
{
|
|
int i;
|
|
struct progress *progress = NULL;
|
|
struct commit **sorted_commits;
|
|
|
|
init_bloom_filters();
|
|
|
|
if (ctx->report_progress)
|
|
progress = start_delayed_progress(
|
|
_("Computing commit changed paths Bloom filters"),
|
|
ctx->commits.nr);
|
|
|
|
ALLOC_ARRAY(sorted_commits, ctx->commits.nr);
|
|
COPY_ARRAY(sorted_commits, ctx->commits.list, ctx->commits.nr);
|
|
|
|
if (ctx->order_by_pack)
|
|
QSORT(sorted_commits, ctx->commits.nr, commit_pos_cmp);
|
|
else
|
|
QSORT(sorted_commits, ctx->commits.nr, commit_gen_cmp);
|
|
|
|
for (i = 0; i < ctx->commits.nr; i++) {
|
|
struct commit *c = sorted_commits[i];
|
|
struct bloom_filter *filter = get_bloom_filter(ctx->r, c, 1);
|
|
ctx->total_bloom_filter_data_size += sizeof(unsigned char) * filter->len;
|
|
display_progress(progress, i + 1);
|
|
}
|
|
|
|
free(sorted_commits);
|
|
stop_progress(&progress);
|
|
}
|
|
|
|
static int add_ref_to_set(const char *refname,
|
|
const struct object_id *oid,
|
|
int flags, void *cb_data)
|
|
{
|
|
struct oidset *commits = (struct oidset *)cb_data;
|
|
|
|
oidset_insert(commits, oid);
|
|
return 0;
|
|
}
|
|
|
|
int write_commit_graph_reachable(struct object_directory *odb,
|
|
enum commit_graph_write_flags flags,
|
|
const struct split_commit_graph_opts *split_opts)
|
|
{
|
|
struct oidset commits = OIDSET_INIT;
|
|
int result;
|
|
|
|
for_each_ref(add_ref_to_set, &commits);
|
|
result = write_commit_graph(odb, NULL, &commits,
|
|
flags, split_opts);
|
|
|
|
oidset_clear(&commits);
|
|
return result;
|
|
}
|
|
|
|
static int fill_oids_from_packs(struct write_commit_graph_context *ctx,
|
|
struct string_list *pack_indexes)
|
|
{
|
|
uint32_t i;
|
|
struct strbuf progress_title = STRBUF_INIT;
|
|
struct strbuf packname = STRBUF_INIT;
|
|
int dirlen;
|
|
|
|
strbuf_addf(&packname, "%s/pack/", ctx->odb->path);
|
|
dirlen = packname.len;
|
|
if (ctx->report_progress) {
|
|
strbuf_addf(&progress_title,
|
|
Q_("Finding commits for commit graph in %d pack",
|
|
"Finding commits for commit graph in %d packs",
|
|
pack_indexes->nr),
|
|
pack_indexes->nr);
|
|
ctx->progress = start_delayed_progress(progress_title.buf, 0);
|
|
ctx->progress_done = 0;
|
|
}
|
|
for (i = 0; i < pack_indexes->nr; i++) {
|
|
struct packed_git *p;
|
|
strbuf_setlen(&packname, dirlen);
|
|
strbuf_addstr(&packname, pack_indexes->items[i].string);
|
|
p = add_packed_git(packname.buf, packname.len, 1);
|
|
if (!p) {
|
|
error(_("error adding pack %s"), packname.buf);
|
|
return -1;
|
|
}
|
|
if (open_pack_index(p)) {
|
|
error(_("error opening index for %s"), packname.buf);
|
|
return -1;
|
|
}
|
|
for_each_object_in_pack(p, add_packed_commits, ctx,
|
|
FOR_EACH_OBJECT_PACK_ORDER);
|
|
close_pack(p);
|
|
free(p);
|
|
}
|
|
|
|
stop_progress(&ctx->progress);
|
|
strbuf_release(&progress_title);
|
|
strbuf_release(&packname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fill_oids_from_commits(struct write_commit_graph_context *ctx,
|
|
struct oidset *commits)
|
|
{
|
|
uint32_t i = 0;
|
|
struct strbuf progress_title = STRBUF_INIT;
|
|
struct oidset_iter iter;
|
|
struct object_id *oid;
|
|
|
|
if (!oidset_size(commits))
|
|
return 0;
|
|
|
|
if (ctx->report_progress) {
|
|
strbuf_addf(&progress_title,
|
|
Q_("Finding commits for commit graph from %d ref",
|
|
"Finding commits for commit graph from %d refs",
|
|
oidset_size(commits)),
|
|
oidset_size(commits));
|
|
ctx->progress = start_delayed_progress(
|
|
progress_title.buf,
|
|
oidset_size(commits));
|
|
}
|
|
|
|
oidset_iter_init(commits, &iter);
|
|
while ((oid = oidset_iter_next(&iter))) {
|
|
struct commit *result;
|
|
|
|
display_progress(ctx->progress, ++i);
|
|
|
|
result = lookup_commit_reference_gently(ctx->r, oid, 1);
|
|
if (result) {
|
|
ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc);
|
|
oidcpy(&ctx->oids.list[ctx->oids.nr], &(result->object.oid));
|
|
ctx->oids.nr++;
|
|
} else if (ctx->check_oids) {
|
|
error(_("invalid commit object id: %s"),
|
|
oid_to_hex(oid));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
stop_progress(&ctx->progress);
|
|
strbuf_release(&progress_title);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx)
|
|
{
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Finding commits for commit graph among packed objects"),
|
|
ctx->approx_nr_objects);
|
|
for_each_packed_object(add_packed_commits, ctx,
|
|
FOR_EACH_OBJECT_PACK_ORDER);
|
|
if (ctx->progress_done < ctx->approx_nr_objects)
|
|
display_progress(ctx->progress, ctx->approx_nr_objects);
|
|
stop_progress(&ctx->progress);
|
|
}
|
|
|
|
static uint32_t count_distinct_commits(struct write_commit_graph_context *ctx)
|
|
{
|
|
uint32_t i, count_distinct = 1;
|
|
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Counting distinct commits in commit graph"),
|
|
ctx->oids.nr);
|
|
display_progress(ctx->progress, 0); /* TODO: Measure QSORT() progress */
|
|
QSORT(ctx->oids.list, ctx->oids.nr, oid_compare);
|
|
|
|
for (i = 1; i < ctx->oids.nr; i++) {
|
|
display_progress(ctx->progress, i + 1);
|
|
if (!oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) {
|
|
if (ctx->split) {
|
|
struct commit *c = lookup_commit(ctx->r, &ctx->oids.list[i]);
|
|
|
|
if (!c || c->graph_pos != COMMIT_NOT_FROM_GRAPH)
|
|
continue;
|
|
}
|
|
|
|
count_distinct++;
|
|
}
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
|
|
return count_distinct;
|
|
}
|
|
|
|
static void copy_oids_to_commits(struct write_commit_graph_context *ctx)
|
|
{
|
|
uint32_t i;
|
|
enum commit_graph_split_flags flags = ctx->split_opts ?
|
|
ctx->split_opts->flags : COMMIT_GRAPH_SPLIT_UNSPECIFIED;
|
|
|
|
ctx->num_extra_edges = 0;
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Finding extra edges in commit graph"),
|
|
ctx->oids.nr);
|
|
for (i = 0; i < ctx->oids.nr; i++) {
|
|
unsigned int num_parents;
|
|
|
|
display_progress(ctx->progress, i + 1);
|
|
if (i > 0 && oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i]))
|
|
continue;
|
|
|
|
ALLOC_GROW(ctx->commits.list, ctx->commits.nr + 1, ctx->commits.alloc);
|
|
ctx->commits.list[ctx->commits.nr] = lookup_commit(ctx->r, &ctx->oids.list[i]);
|
|
|
|
if (ctx->split && flags != COMMIT_GRAPH_SPLIT_REPLACE &&
|
|
ctx->commits.list[ctx->commits.nr]->graph_pos != COMMIT_NOT_FROM_GRAPH)
|
|
continue;
|
|
|
|
if (ctx->split && flags == COMMIT_GRAPH_SPLIT_REPLACE)
|
|
parse_commit(ctx->commits.list[ctx->commits.nr]);
|
|
else
|
|
parse_commit_no_graph(ctx->commits.list[ctx->commits.nr]);
|
|
|
|
num_parents = commit_list_count(ctx->commits.list[ctx->commits.nr]->parents);
|
|
if (num_parents > 2)
|
|
ctx->num_extra_edges += num_parents - 1;
|
|
|
|
ctx->commits.nr++;
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
}
|
|
|
|
static int write_graph_chunk_base_1(struct hashfile *f,
|
|
struct commit_graph *g)
|
|
{
|
|
int num = 0;
|
|
|
|
if (!g)
|
|
return 0;
|
|
|
|
num = write_graph_chunk_base_1(f, g->base_graph);
|
|
hashwrite(f, g->oid.hash, the_hash_algo->rawsz);
|
|
return num + 1;
|
|
}
|
|
|
|
static int write_graph_chunk_base(struct hashfile *f,
|
|
struct write_commit_graph_context *ctx)
|
|
{
|
|
int num = write_graph_chunk_base_1(f, ctx->new_base_graph);
|
|
|
|
if (num != ctx->num_commit_graphs_after - 1) {
|
|
error(_("failed to write correct number of base graph ids"));
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_commit_graph_file(struct write_commit_graph_context *ctx)
|
|
{
|
|
uint32_t i;
|
|
int fd;
|
|
struct hashfile *f;
|
|
struct lock_file lk = LOCK_INIT;
|
|
uint32_t chunk_ids[MAX_NUM_CHUNKS + 1];
|
|
uint64_t chunk_offsets[MAX_NUM_CHUNKS + 1];
|
|
const unsigned hashsz = the_hash_algo->rawsz;
|
|
struct strbuf progress_title = STRBUF_INIT;
|
|
int num_chunks = 3;
|
|
struct object_id file_hash;
|
|
const struct bloom_filter_settings bloom_settings = DEFAULT_BLOOM_FILTER_SETTINGS;
|
|
|
|
if (ctx->split) {
|
|
struct strbuf tmp_file = STRBUF_INIT;
|
|
|
|
strbuf_addf(&tmp_file,
|
|
"%s/info/commit-graphs/tmp_graph_XXXXXX",
|
|
ctx->odb->path);
|
|
ctx->graph_name = strbuf_detach(&tmp_file, NULL);
|
|
} else {
|
|
ctx->graph_name = get_commit_graph_filename(ctx->odb);
|
|
}
|
|
|
|
if (safe_create_leading_directories(ctx->graph_name)) {
|
|
UNLEAK(ctx->graph_name);
|
|
error(_("unable to create leading directories of %s"),
|
|
ctx->graph_name);
|
|
return -1;
|
|
}
|
|
|
|
if (ctx->split) {
|
|
char *lock_name = get_chain_filename(ctx->odb);
|
|
|
|
hold_lock_file_for_update_mode(&lk, lock_name,
|
|
LOCK_DIE_ON_ERROR, 0444);
|
|
|
|
fd = git_mkstemp_mode(ctx->graph_name, 0444);
|
|
if (fd < 0) {
|
|
error(_("unable to create temporary graph layer"));
|
|
return -1;
|
|
}
|
|
|
|
if (adjust_shared_perm(ctx->graph_name)) {
|
|
error(_("unable to adjust shared permissions for '%s'"),
|
|
ctx->graph_name);
|
|
return -1;
|
|
}
|
|
|
|
f = hashfd(fd, ctx->graph_name);
|
|
} else {
|
|
hold_lock_file_for_update_mode(&lk, ctx->graph_name,
|
|
LOCK_DIE_ON_ERROR, 0444);
|
|
fd = lk.tempfile->fd;
|
|
f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf);
|
|
}
|
|
|
|
chunk_ids[0] = GRAPH_CHUNKID_OIDFANOUT;
|
|
chunk_ids[1] = GRAPH_CHUNKID_OIDLOOKUP;
|
|
chunk_ids[2] = GRAPH_CHUNKID_DATA;
|
|
if (ctx->num_extra_edges) {
|
|
chunk_ids[num_chunks] = GRAPH_CHUNKID_EXTRAEDGES;
|
|
num_chunks++;
|
|
}
|
|
if (ctx->changed_paths) {
|
|
chunk_ids[num_chunks] = GRAPH_CHUNKID_BLOOMINDEXES;
|
|
num_chunks++;
|
|
chunk_ids[num_chunks] = GRAPH_CHUNKID_BLOOMDATA;
|
|
num_chunks++;
|
|
}
|
|
if (ctx->num_commit_graphs_after > 1) {
|
|
chunk_ids[num_chunks] = GRAPH_CHUNKID_BASE;
|
|
num_chunks++;
|
|
}
|
|
|
|
chunk_ids[num_chunks] = 0;
|
|
|
|
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] + hashsz * ctx->commits.nr;
|
|
chunk_offsets[3] = chunk_offsets[2] + (hashsz + 16) * ctx->commits.nr;
|
|
|
|
num_chunks = 3;
|
|
if (ctx->num_extra_edges) {
|
|
chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] +
|
|
4 * ctx->num_extra_edges;
|
|
num_chunks++;
|
|
}
|
|
if (ctx->changed_paths) {
|
|
chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] +
|
|
sizeof(uint32_t) * ctx->commits.nr;
|
|
num_chunks++;
|
|
|
|
chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] +
|
|
sizeof(uint32_t) * 3 + ctx->total_bloom_filter_data_size;
|
|
num_chunks++;
|
|
}
|
|
if (ctx->num_commit_graphs_after > 1) {
|
|
chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] +
|
|
hashsz * (ctx->num_commit_graphs_after - 1);
|
|
num_chunks++;
|
|
}
|
|
|
|
hashwrite_be32(f, GRAPH_SIGNATURE);
|
|
|
|
hashwrite_u8(f, GRAPH_VERSION);
|
|
hashwrite_u8(f, oid_version());
|
|
hashwrite_u8(f, num_chunks);
|
|
hashwrite_u8(f, ctx->num_commit_graphs_after - 1);
|
|
|
|
for (i = 0; i <= num_chunks; i++) {
|
|
uint32_t chunk_write[3];
|
|
|
|
chunk_write[0] = htonl(chunk_ids[i]);
|
|
chunk_write[1] = htonl(chunk_offsets[i] >> 32);
|
|
chunk_write[2] = htonl(chunk_offsets[i] & 0xffffffff);
|
|
hashwrite(f, chunk_write, 12);
|
|
}
|
|
|
|
if (ctx->report_progress) {
|
|
strbuf_addf(&progress_title,
|
|
Q_("Writing out commit graph in %d pass",
|
|
"Writing out commit graph in %d passes",
|
|
num_chunks),
|
|
num_chunks);
|
|
ctx->progress = start_delayed_progress(
|
|
progress_title.buf,
|
|
num_chunks * ctx->commits.nr);
|
|
}
|
|
write_graph_chunk_fanout(f, ctx);
|
|
write_graph_chunk_oids(f, hashsz, ctx);
|
|
write_graph_chunk_data(f, hashsz, ctx);
|
|
if (ctx->num_extra_edges)
|
|
write_graph_chunk_extra_edges(f, ctx);
|
|
if (ctx->changed_paths) {
|
|
write_graph_chunk_bloom_indexes(f, ctx);
|
|
write_graph_chunk_bloom_data(f, ctx, &bloom_settings);
|
|
}
|
|
if (ctx->num_commit_graphs_after > 1 &&
|
|
write_graph_chunk_base(f, ctx)) {
|
|
return -1;
|
|
}
|
|
stop_progress(&ctx->progress);
|
|
strbuf_release(&progress_title);
|
|
|
|
if (ctx->split && ctx->base_graph_name && ctx->num_commit_graphs_after > 1) {
|
|
char *new_base_hash = xstrdup(oid_to_hex(&ctx->new_base_graph->oid));
|
|
char *new_base_name = get_split_graph_filename(ctx->new_base_graph->odb, new_base_hash);
|
|
|
|
free(ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2]);
|
|
free(ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2]);
|
|
ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2] = new_base_name;
|
|
ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2] = new_base_hash;
|
|
}
|
|
|
|
close_commit_graph(ctx->r->objects);
|
|
finalize_hashfile(f, file_hash.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC);
|
|
|
|
if (ctx->split) {
|
|
FILE *chainf = fdopen_lock_file(&lk, "w");
|
|
char *final_graph_name;
|
|
int result;
|
|
|
|
close(fd);
|
|
|
|
if (!chainf) {
|
|
error(_("unable to open commit-graph chain file"));
|
|
return -1;
|
|
}
|
|
|
|
if (ctx->base_graph_name) {
|
|
const char *dest;
|
|
int idx = ctx->num_commit_graphs_after - 1;
|
|
if (ctx->num_commit_graphs_after > 1)
|
|
idx--;
|
|
|
|
dest = ctx->commit_graph_filenames_after[idx];
|
|
|
|
if (strcmp(ctx->base_graph_name, dest)) {
|
|
result = rename(ctx->base_graph_name, dest);
|
|
|
|
if (result) {
|
|
error(_("failed to rename base commit-graph file"));
|
|
return -1;
|
|
}
|
|
}
|
|
} else {
|
|
char *graph_name = get_commit_graph_filename(ctx->odb);
|
|
unlink(graph_name);
|
|
}
|
|
|
|
ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1] = xstrdup(oid_to_hex(&file_hash));
|
|
final_graph_name = get_split_graph_filename(ctx->odb,
|
|
ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1]);
|
|
ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 1] = final_graph_name;
|
|
|
|
result = rename(ctx->graph_name, final_graph_name);
|
|
|
|
for (i = 0; i < ctx->num_commit_graphs_after; i++)
|
|
fprintf(lk.tempfile->fp, "%s\n", ctx->commit_graph_hash_after[i]);
|
|
|
|
if (result) {
|
|
error(_("failed to rename temporary commit-graph file"));
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
commit_lock_file(&lk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void split_graph_merge_strategy(struct write_commit_graph_context *ctx)
|
|
{
|
|
struct commit_graph *g;
|
|
uint32_t num_commits;
|
|
enum commit_graph_split_flags flags = COMMIT_GRAPH_SPLIT_UNSPECIFIED;
|
|
uint32_t i;
|
|
|
|
int max_commits = 0;
|
|
int size_mult = 2;
|
|
|
|
if (ctx->split_opts) {
|
|
max_commits = ctx->split_opts->max_commits;
|
|
|
|
if (ctx->split_opts->size_multiple)
|
|
size_mult = ctx->split_opts->size_multiple;
|
|
|
|
flags = ctx->split_opts->flags;
|
|
}
|
|
|
|
g = ctx->r->objects->commit_graph;
|
|
num_commits = ctx->commits.nr;
|
|
if (flags == COMMIT_GRAPH_SPLIT_REPLACE)
|
|
ctx->num_commit_graphs_after = 1;
|
|
else
|
|
ctx->num_commit_graphs_after = ctx->num_commit_graphs_before + 1;
|
|
|
|
if (flags != COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED &&
|
|
flags != COMMIT_GRAPH_SPLIT_REPLACE) {
|
|
while (g && (g->num_commits <= size_mult * num_commits ||
|
|
(max_commits && num_commits > max_commits))) {
|
|
if (g->odb != ctx->odb)
|
|
break;
|
|
|
|
num_commits += g->num_commits;
|
|
g = g->base_graph;
|
|
|
|
ctx->num_commit_graphs_after--;
|
|
}
|
|
}
|
|
|
|
if (flags != COMMIT_GRAPH_SPLIT_REPLACE)
|
|
ctx->new_base_graph = g;
|
|
else if (ctx->num_commit_graphs_after != 1)
|
|
BUG("split_graph_merge_strategy: num_commit_graphs_after "
|
|
"should be 1 with --split=replace");
|
|
|
|
if (ctx->num_commit_graphs_after == 2) {
|
|
char *old_graph_name = get_commit_graph_filename(g->odb);
|
|
|
|
if (!strcmp(g->filename, old_graph_name) &&
|
|
g->odb != ctx->odb) {
|
|
ctx->num_commit_graphs_after = 1;
|
|
ctx->new_base_graph = NULL;
|
|
}
|
|
|
|
free(old_graph_name);
|
|
}
|
|
|
|
CALLOC_ARRAY(ctx->commit_graph_filenames_after, ctx->num_commit_graphs_after);
|
|
CALLOC_ARRAY(ctx->commit_graph_hash_after, ctx->num_commit_graphs_after);
|
|
|
|
for (i = 0; i < ctx->num_commit_graphs_after &&
|
|
i < ctx->num_commit_graphs_before; i++)
|
|
ctx->commit_graph_filenames_after[i] = xstrdup(ctx->commit_graph_filenames_before[i]);
|
|
|
|
i = ctx->num_commit_graphs_before - 1;
|
|
g = ctx->r->objects->commit_graph;
|
|
|
|
while (g) {
|
|
if (i < ctx->num_commit_graphs_after)
|
|
ctx->commit_graph_hash_after[i] = xstrdup(oid_to_hex(&g->oid));
|
|
|
|
i--;
|
|
g = g->base_graph;
|
|
}
|
|
}
|
|
|
|
static void merge_commit_graph(struct write_commit_graph_context *ctx,
|
|
struct commit_graph *g)
|
|
{
|
|
uint32_t i;
|
|
uint32_t offset = g->num_commits_in_base;
|
|
|
|
ALLOC_GROW(ctx->commits.list, ctx->commits.nr + g->num_commits, ctx->commits.alloc);
|
|
|
|
for (i = 0; i < g->num_commits; i++) {
|
|
struct object_id oid;
|
|
struct commit *result;
|
|
|
|
display_progress(ctx->progress, i + 1);
|
|
|
|
load_oid_from_graph(g, i + offset, &oid);
|
|
|
|
/* only add commits if they still exist in the repo */
|
|
result = lookup_commit_reference_gently(ctx->r, &oid, 1);
|
|
|
|
if (result) {
|
|
ctx->commits.list[ctx->commits.nr] = result;
|
|
ctx->commits.nr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int commit_compare(const void *_a, const void *_b)
|
|
{
|
|
const struct commit *a = *(const struct commit **)_a;
|
|
const struct commit *b = *(const struct commit **)_b;
|
|
return oidcmp(&a->object.oid, &b->object.oid);
|
|
}
|
|
|
|
static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx)
|
|
{
|
|
uint32_t i;
|
|
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(
|
|
_("Scanning merged commits"),
|
|
ctx->commits.nr);
|
|
|
|
QSORT(ctx->commits.list, ctx->commits.nr, commit_compare);
|
|
|
|
ctx->num_extra_edges = 0;
|
|
for (i = 0; i < ctx->commits.nr; i++) {
|
|
display_progress(ctx->progress, i);
|
|
|
|
if (i && oideq(&ctx->commits.list[i - 1]->object.oid,
|
|
&ctx->commits.list[i]->object.oid)) {
|
|
die(_("unexpected duplicate commit id %s"),
|
|
oid_to_hex(&ctx->commits.list[i]->object.oid));
|
|
} else {
|
|
unsigned int num_parents;
|
|
|
|
num_parents = commit_list_count(ctx->commits.list[i]->parents);
|
|
if (num_parents > 2)
|
|
ctx->num_extra_edges += num_parents - 1;
|
|
}
|
|
}
|
|
|
|
stop_progress(&ctx->progress);
|
|
}
|
|
|
|
static void merge_commit_graphs(struct write_commit_graph_context *ctx)
|
|
{
|
|
struct commit_graph *g = ctx->r->objects->commit_graph;
|
|
uint32_t current_graph_number = ctx->num_commit_graphs_before;
|
|
|
|
while (g && current_graph_number >= ctx->num_commit_graphs_after) {
|
|
current_graph_number--;
|
|
|
|
if (ctx->report_progress)
|
|
ctx->progress = start_delayed_progress(_("Merging commit-graph"), 0);
|
|
|
|
merge_commit_graph(ctx, g);
|
|
stop_progress(&ctx->progress);
|
|
|
|
g = g->base_graph;
|
|
}
|
|
|
|
if (g) {
|
|
ctx->new_base_graph = g;
|
|
ctx->new_num_commits_in_base = g->num_commits + g->num_commits_in_base;
|
|
}
|
|
|
|
if (ctx->new_base_graph)
|
|
ctx->base_graph_name = xstrdup(ctx->new_base_graph->filename);
|
|
|
|
sort_and_scan_merged_commits(ctx);
|
|
}
|
|
|
|
static void mark_commit_graphs(struct write_commit_graph_context *ctx)
|
|
{
|
|
uint32_t i;
|
|
time_t now = time(NULL);
|
|
|
|
for (i = ctx->num_commit_graphs_after - 1; i < ctx->num_commit_graphs_before; i++) {
|
|
struct stat st;
|
|
struct utimbuf updated_time;
|
|
|
|
stat(ctx->commit_graph_filenames_before[i], &st);
|
|
|
|
updated_time.actime = st.st_atime;
|
|
updated_time.modtime = now;
|
|
utime(ctx->commit_graph_filenames_before[i], &updated_time);
|
|
}
|
|
}
|
|
|
|
static void expire_commit_graphs(struct write_commit_graph_context *ctx)
|
|
{
|
|
struct strbuf path = STRBUF_INIT;
|
|
DIR *dir;
|
|
struct dirent *de;
|
|
size_t dirnamelen;
|
|
timestamp_t expire_time = time(NULL);
|
|
|
|
if (ctx->split_opts && ctx->split_opts->expire_time)
|
|
expire_time = ctx->split_opts->expire_time;
|
|
if (!ctx->split) {
|
|
char *chain_file_name = get_chain_filename(ctx->odb);
|
|
unlink(chain_file_name);
|
|
free(chain_file_name);
|
|
ctx->num_commit_graphs_after = 0;
|
|
}
|
|
|
|
strbuf_addstr(&path, ctx->odb->path);
|
|
strbuf_addstr(&path, "/info/commit-graphs");
|
|
dir = opendir(path.buf);
|
|
|
|
if (!dir)
|
|
goto out;
|
|
|
|
strbuf_addch(&path, '/');
|
|
dirnamelen = path.len;
|
|
while ((de = readdir(dir)) != NULL) {
|
|
struct stat st;
|
|
uint32_t i, found = 0;
|
|
|
|
strbuf_setlen(&path, dirnamelen);
|
|
strbuf_addstr(&path, de->d_name);
|
|
|
|
stat(path.buf, &st);
|
|
|
|
if (st.st_mtime > expire_time)
|
|
continue;
|
|
if (path.len < 6 || strcmp(path.buf + path.len - 6, ".graph"))
|
|
continue;
|
|
|
|
for (i = 0; i < ctx->num_commit_graphs_after; i++) {
|
|
if (!strcmp(ctx->commit_graph_filenames_after[i],
|
|
path.buf)) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
unlink(path.buf);
|
|
}
|
|
|
|
out:
|
|
strbuf_release(&path);
|
|
}
|
|
|
|
int write_commit_graph(struct object_directory *odb,
|
|
struct string_list *pack_indexes,
|
|
struct oidset *commits,
|
|
enum commit_graph_write_flags flags,
|
|
const struct split_commit_graph_opts *split_opts)
|
|
{
|
|
struct write_commit_graph_context *ctx;
|
|
uint32_t i, count_distinct = 0;
|
|
int res = 0;
|
|
int replace = 0;
|
|
|
|
if (!commit_graph_compatible(the_repository))
|
|
return 0;
|
|
|
|
ctx = xcalloc(1, sizeof(struct write_commit_graph_context));
|
|
ctx->r = the_repository;
|
|
ctx->odb = odb;
|
|
ctx->append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0;
|
|
ctx->report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0;
|
|
ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0;
|
|
ctx->check_oids = flags & COMMIT_GRAPH_WRITE_CHECK_OIDS ? 1 : 0;
|
|
ctx->split_opts = split_opts;
|
|
ctx->changed_paths = flags & COMMIT_GRAPH_WRITE_BLOOM_FILTERS ? 1 : 0;
|
|
ctx->total_bloom_filter_data_size = 0;
|
|
|
|
if (ctx->split) {
|
|
struct commit_graph *g;
|
|
prepare_commit_graph(ctx->r);
|
|
|
|
g = ctx->r->objects->commit_graph;
|
|
|
|
while (g) {
|
|
ctx->num_commit_graphs_before++;
|
|
g = g->base_graph;
|
|
}
|
|
|
|
if (ctx->num_commit_graphs_before) {
|
|
ALLOC_ARRAY(ctx->commit_graph_filenames_before, ctx->num_commit_graphs_before);
|
|
i = ctx->num_commit_graphs_before;
|
|
g = ctx->r->objects->commit_graph;
|
|
|
|
while (g) {
|
|
ctx->commit_graph_filenames_before[--i] = xstrdup(g->filename);
|
|
g = g->base_graph;
|
|
}
|
|
}
|
|
|
|
if (ctx->split_opts)
|
|
replace = ctx->split_opts->flags & COMMIT_GRAPH_SPLIT_REPLACE;
|
|
}
|
|
|
|
ctx->approx_nr_objects = approximate_object_count();
|
|
ctx->oids.alloc = ctx->approx_nr_objects / 32;
|
|
|
|
if (ctx->split && split_opts && ctx->oids.alloc > split_opts->max_commits)
|
|
ctx->oids.alloc = split_opts->max_commits;
|
|
|
|
if (ctx->append) {
|
|
prepare_commit_graph_one(ctx->r, ctx->odb);
|
|
if (ctx->r->objects->commit_graph)
|
|
ctx->oids.alloc += ctx->r->objects->commit_graph->num_commits;
|
|
}
|
|
|
|
if (ctx->oids.alloc < 1024)
|
|
ctx->oids.alloc = 1024;
|
|
ALLOC_ARRAY(ctx->oids.list, ctx->oids.alloc);
|
|
|
|
if (ctx->append && ctx->r->objects->commit_graph) {
|
|
struct commit_graph *g = ctx->r->objects->commit_graph;
|
|
for (i = 0; i < g->num_commits; i++) {
|
|
const unsigned char *hash = g->chunk_oid_lookup + g->hash_len * i;
|
|
hashcpy(ctx->oids.list[ctx->oids.nr++].hash, hash);
|
|
}
|
|
}
|
|
|
|
if (pack_indexes) {
|
|
ctx->order_by_pack = 1;
|
|
if ((res = fill_oids_from_packs(ctx, pack_indexes)))
|
|
goto cleanup;
|
|
}
|
|
|
|
if (commits) {
|
|
if ((res = fill_oids_from_commits(ctx, commits)))
|
|
goto cleanup;
|
|
}
|
|
|
|
if (!pack_indexes && !commits) {
|
|
ctx->order_by_pack = 1;
|
|
fill_oids_from_all_packs(ctx);
|
|
}
|
|
|
|
close_reachable(ctx);
|
|
|
|
count_distinct = count_distinct_commits(ctx);
|
|
|
|
if (count_distinct >= GRAPH_EDGE_LAST_MASK) {
|
|
error(_("the commit graph format cannot write %d commits"), count_distinct);
|
|
res = -1;
|
|
goto cleanup;
|
|
}
|
|
|
|
ctx->commits.alloc = count_distinct;
|
|
ALLOC_ARRAY(ctx->commits.list, ctx->commits.alloc);
|
|
|
|
copy_oids_to_commits(ctx);
|
|
|
|
if (ctx->commits.nr >= GRAPH_EDGE_LAST_MASK) {
|
|
error(_("too many commits to write graph"));
|
|
res = -1;
|
|
goto cleanup;
|
|
}
|
|
|
|
if (!ctx->commits.nr && !replace)
|
|
goto cleanup;
|
|
|
|
if (ctx->split) {
|
|
split_graph_merge_strategy(ctx);
|
|
|
|
if (!replace)
|
|
merge_commit_graphs(ctx);
|
|
} else
|
|
ctx->num_commit_graphs_after = 1;
|
|
|
|
compute_generation_numbers(ctx);
|
|
|
|
if (ctx->changed_paths)
|
|
compute_bloom_filters(ctx);
|
|
|
|
res = write_commit_graph_file(ctx);
|
|
|
|
if (ctx->split)
|
|
mark_commit_graphs(ctx);
|
|
|
|
expire_commit_graphs(ctx);
|
|
|
|
cleanup:
|
|
free(ctx->graph_name);
|
|
free(ctx->commits.list);
|
|
free(ctx->oids.list);
|
|
|
|
if (ctx->commit_graph_filenames_after) {
|
|
for (i = 0; i < ctx->num_commit_graphs_after; i++) {
|
|
free(ctx->commit_graph_filenames_after[i]);
|
|
free(ctx->commit_graph_hash_after[i]);
|
|
}
|
|
|
|
for (i = 0; i < ctx->num_commit_graphs_before; i++)
|
|
free(ctx->commit_graph_filenames_before[i]);
|
|
|
|
free(ctx->commit_graph_filenames_after);
|
|
free(ctx->commit_graph_filenames_before);
|
|
free(ctx->commit_graph_hash_after);
|
|
}
|
|
|
|
free(ctx);
|
|
|
|
return res;
|
|
}
|
|
|
|
#define VERIFY_COMMIT_GRAPH_ERROR_HASH 2
|
|
static int verify_commit_graph_error;
|
|
|
|
static void graph_report(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
verify_commit_graph_error = 1;
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
fprintf(stderr, "\n");
|
|
va_end(ap);
|
|
}
|
|
|
|
#define GENERATION_ZERO_EXISTS 1
|
|
#define GENERATION_NUMBER_EXISTS 2
|
|
|
|
int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags)
|
|
{
|
|
uint32_t i, cur_fanout_pos = 0;
|
|
struct object_id prev_oid, cur_oid, checksum;
|
|
int generation_zero = 0;
|
|
struct hashfile *f;
|
|
int devnull;
|
|
struct progress *progress = NULL;
|
|
int local_error = 0;
|
|
|
|
if (!g) {
|
|
graph_report("no commit-graph file loaded");
|
|
return 1;
|
|
}
|
|
|
|
verify_commit_graph_error = verify_commit_graph_lite(g);
|
|
if (verify_commit_graph_error)
|
|
return verify_commit_graph_error;
|
|
|
|
devnull = open("/dev/null", O_WRONLY);
|
|
f = hashfd(devnull, NULL);
|
|
hashwrite(f, g->data, g->data_len - g->hash_len);
|
|
finalize_hashfile(f, checksum.hash, CSUM_CLOSE);
|
|
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;
|
|
}
|
|
|
|
for (i = 0; i < g->num_commits; i++) {
|
|
struct commit *graph_commit;
|
|
|
|
hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i);
|
|
|
|
if (i && oidcmp(&prev_oid, &cur_oid) >= 0)
|
|
graph_report(_("commit-graph has incorrect OID order: %s then %s"),
|
|
oid_to_hex(&prev_oid),
|
|
oid_to_hex(&cur_oid));
|
|
|
|
oidcpy(&prev_oid, &cur_oid);
|
|
|
|
while (cur_oid.hash[0] > cur_fanout_pos) {
|
|
uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos);
|
|
|
|
if (i != fanout_value)
|
|
graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"),
|
|
cur_fanout_pos, fanout_value, i);
|
|
cur_fanout_pos++;
|
|
}
|
|
|
|
graph_commit = lookup_commit(r, &cur_oid);
|
|
if (!parse_commit_in_graph_one(r, g, graph_commit))
|
|
graph_report(_("failed to parse commit %s from commit-graph"),
|
|
oid_to_hex(&cur_oid));
|
|
}
|
|
|
|
while (cur_fanout_pos < 256) {
|
|
uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos);
|
|
|
|
if (g->num_commits != fanout_value)
|
|
graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"),
|
|
cur_fanout_pos, fanout_value, i);
|
|
|
|
cur_fanout_pos++;
|
|
}
|
|
|
|
if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH)
|
|
return verify_commit_graph_error;
|
|
|
|
if (flags & COMMIT_GRAPH_WRITE_PROGRESS)
|
|
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);
|
|
odb_commit = (struct commit *)create_object(r, &cur_oid, alloc_commit_node(r));
|
|
if (parse_commit_internal(odb_commit, 0, 0)) {
|
|
graph_report(_("failed to parse commit %s from object database for commit-graph"),
|
|
oid_to_hex(&cur_oid));
|
|
continue;
|
|
}
|
|
|
|
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),
|
|
oid_to_hex(get_commit_tree_oid(graph_commit)),
|
|
oid_to_hex(get_commit_tree_oid(odb_commit)));
|
|
|
|
graph_parents = graph_commit->parents;
|
|
odb_parents = odb_commit->parents;
|
|
|
|
while (graph_parents) {
|
|
if (odb_parents == NULL) {
|
|
graph_report(_("commit-graph parent list for commit %s is too long"),
|
|
oid_to_hex(&cur_oid));
|
|
break;
|
|
}
|
|
|
|
/* parse parent in case it is in a base graph */
|
|
parse_commit_in_graph_one(r, g, graph_parents->item);
|
|
|
|
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),
|
|
oid_to_hex(&odb_parents->item->object.oid));
|
|
|
|
if (graph_parents->item->generation > max_generation)
|
|
max_generation = graph_parents->item->generation;
|
|
|
|
graph_parents = graph_parents->next;
|
|
odb_parents = odb_parents->next;
|
|
}
|
|
|
|
if (odb_parents != NULL)
|
|
graph_report(_("commit-graph parent list for commit %s terminates early"),
|
|
oid_to_hex(&cur_oid));
|
|
|
|
if (!graph_commit->generation) {
|
|
if (generation_zero == GENERATION_NUMBER_EXISTS)
|
|
graph_report(_("commit-graph has generation number zero for commit %s, but non-zero elsewhere"),
|
|
oid_to_hex(&cur_oid));
|
|
generation_zero = GENERATION_ZERO_EXISTS;
|
|
} else if (generation_zero == GENERATION_ZERO_EXISTS)
|
|
graph_report(_("commit-graph has non-zero generation number for commit %s, but zero elsewhere"),
|
|
oid_to_hex(&cur_oid));
|
|
|
|
if (generation_zero == GENERATION_ZERO_EXISTS)
|
|
continue;
|
|
|
|
/*
|
|
* If one of our parents has generation GENERATION_NUMBER_MAX, then
|
|
* our generation is also GENERATION_NUMBER_MAX. Decrement to avoid
|
|
* extra logic in the following condition.
|
|
*/
|
|
if (max_generation == GENERATION_NUMBER_MAX)
|
|
max_generation--;
|
|
|
|
if (graph_commit->generation != max_generation + 1)
|
|
graph_report(_("commit-graph generation for commit %s is %u != %u"),
|
|
oid_to_hex(&cur_oid),
|
|
graph_commit->generation,
|
|
max_generation + 1);
|
|
|
|
if (graph_commit->date != odb_commit->date)
|
|
graph_report(_("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime),
|
|
oid_to_hex(&cur_oid),
|
|
graph_commit->date,
|
|
odb_commit->date);
|
|
}
|
|
stop_progress(&progress);
|
|
|
|
local_error = verify_commit_graph_error;
|
|
|
|
if (!(flags & COMMIT_GRAPH_VERIFY_SHALLOW) && g->base_graph)
|
|
local_error |= verify_commit_graph(r, g->base_graph, flags);
|
|
|
|
return local_error;
|
|
}
|
|
|
|
void free_commit_graph(struct commit_graph *g)
|
|
{
|
|
if (!g)
|
|
return;
|
|
if (g->data) {
|
|
munmap((void *)g->data, g->data_len);
|
|
g->data = NULL;
|
|
}
|
|
free(g->filename);
|
|
free(g->bloom_filter_settings);
|
|
free(g);
|
|
}
|
|
|
|
void disable_commit_graph(struct repository *r)
|
|
{
|
|
r->commit_graph_disabled = 1;
|
|
}
|