diff options
Diffstat (limited to 'commit-graph.c')
| -rw-r--r-- | commit-graph.c | 156 |
1 files changed, 98 insertions, 58 deletions
diff --git a/commit-graph.c b/commit-graph.c index 0aa1640d15..1a56efcf69 100644 --- a/commit-graph.c +++ b/commit-graph.c @@ -128,6 +128,16 @@ timestamp_t commit_graph_generation(const struct commit *c) return GENERATION_NUMBER_INFINITY; } +static timestamp_t commit_graph_generation_from_graph(const struct commit *c) +{ + struct commit_graph_data *data = + commit_graph_data_slab_peek(&commit_graph_data_slab, c); + + if (!data || data->graph_pos == COMMIT_NOT_FROM_GRAPH) + return GENERATION_NUMBER_INFINITY; + return data->generation; +} + static struct commit_graph_data *commit_graph_data_at(const struct commit *c) { unsigned int i, nth_slab; @@ -463,6 +473,31 @@ static struct commit_graph *load_commit_graph_v1(struct repository *r, return g; } +/* + * returns 1 if and only if all graphs in the chain have + * corrected commit dates stored in the generation_data chunk. + */ +static int validate_mixed_generation_chain(struct commit_graph *g) +{ + int read_generation_data = 1; + struct commit_graph *p = g; + + while (read_generation_data && p) { + read_generation_data = p->read_generation_data; + p = p->base_graph; + } + + if (read_generation_data) + return 1; + + while (g) { + g->read_generation_data = 0; + g = g->base_graph; + } + + return 0; +} + static int add_graph_to_chain(struct commit_graph *g, struct commit_graph *chain, struct object_id *oids, @@ -503,31 +538,41 @@ static int add_graph_to_chain(struct commit_graph *g, return 1; } -static struct commit_graph *load_commit_graph_chain(struct repository *r, - struct object_directory *odb) +int open_commit_graph_chain(const char *chain_file, + int *fd, struct stat *st) +{ + *fd = git_open(chain_file); + if (*fd < 0) + return 0; + if (fstat(*fd, st)) { + close(*fd); + return 0; + } + if (st->st_size < the_hash_algo->hexsz) { + close(*fd); + if (!st->st_size) { + /* treat empty files the same as missing */ + errno = ENOENT; + } else { + warning("commit-graph chain file too small"); + errno = EINVAL; + } + return 0; + } + return 1; +} + +struct commit_graph *load_commit_graph_chain_fd_st(struct repository *r, + int fd, struct stat *st, + int *incomplete_chain) { struct commit_graph *graph_chain = NULL; struct strbuf line = STRBUF_INIT; - struct stat st; struct object_id *oids; int i = 0, valid = 1, count; - char *chain_name = get_commit_graph_chain_filename(odb); - FILE *fp; - int stat_res; - - fp = fopen(chain_name, "r"); - stat_res = stat(chain_name, &st); - free(chain_name); + FILE *fp = xfdopen(fd, "r"); - if (!fp) - return NULL; - if (stat_res || - st.st_size <= the_hash_algo->hexsz) { - fclose(fp); - return NULL; - } - - count = st.st_size / (the_hash_algo->hexsz + 1); + count = st->st_size / (the_hash_algo->hexsz + 1); CALLOC_ARRAY(oids, count); prepare_alt_odb(r); @@ -568,36 +613,32 @@ static struct commit_graph *load_commit_graph_chain(struct repository *r, } } + validate_mixed_generation_chain(graph_chain); + free(oids); fclose(fp); strbuf_release(&line); + *incomplete_chain = !valid; return graph_chain; } -/* - * returns 1 if and only if all graphs in the chain have - * corrected commit dates stored in the generation_data chunk. - */ -static int validate_mixed_generation_chain(struct commit_graph *g) +static struct commit_graph *load_commit_graph_chain(struct repository *r, + struct object_directory *odb) { - int read_generation_data = 1; - struct commit_graph *p = g; - - while (read_generation_data && p) { - read_generation_data = p->read_generation_data; - p = p->base_graph; - } - - if (read_generation_data) - return 1; + char *chain_file = get_commit_graph_chain_filename(odb); + struct stat st; + int fd; + struct commit_graph *g = NULL; - while (g) { - g->read_generation_data = 0; - g = g->base_graph; + if (open_commit_graph_chain(chain_file, &fd, &st)) { + int incomplete; + /* ownership of fd is taken over by load function */ + g = load_commit_graph_chain_fd_st(r, fd, &st, &incomplete); } - return 0; + free(chain_file); + return g; } struct commit_graph *read_commit_graph_one(struct repository *r, @@ -608,8 +649,6 @@ struct commit_graph *read_commit_graph_one(struct repository *r, if (!g) g = load_commit_graph_chain(r, odb); - validate_mixed_generation_chain(g); - return g; } @@ -1568,12 +1607,14 @@ static void compute_topological_levels(struct write_commit_graph_context *ctx) stop_progress(&ctx->progress); } -static timestamp_t get_generation_from_graph_data(struct commit *c, void *data) +static timestamp_t get_generation_from_graph_data(struct commit *c, + void *data UNUSED) { return commit_graph_data_at(c)->generation; } -static void set_generation_v2(struct commit *c, timestamp_t t, void *data) +static void set_generation_v2(struct commit *c, timestamp_t t, + void *data UNUSED) { struct commit_graph_data *g = commit_graph_data_at(c); g->generation = t; @@ -1587,7 +1628,6 @@ static void compute_generation_numbers(struct write_commit_graph_context *ctx) .commits = &ctx->commits, .get_generation = get_generation_from_graph_data, .set_generation = set_generation_v2, - .data = ctx, }; if (ctx->report_progress) @@ -1616,7 +1656,7 @@ static void compute_generation_numbers(struct write_commit_graph_context *ctx) } static void set_generation_in_graph_data(struct commit *c, timestamp_t t, - void *data) + void *data UNUSED) { commit_graph_data_at(c)->generation = t; } @@ -2550,9 +2590,6 @@ static void graph_report(const char *fmt, ...) va_end(ap); } -#define GENERATION_ZERO_EXISTS 1 -#define GENERATION_NUMBER_EXISTS 2 - static int commit_graph_checksum_valid(struct commit_graph *g) { return hashfile_checksum_valid(g->data, g->data_len); @@ -2565,7 +2602,8 @@ static int verify_one_commit_graph(struct repository *r, { uint32_t i, cur_fanout_pos = 0; struct object_id prev_oid, cur_oid; - int generation_zero = 0; + struct commit *seen_gen_zero = NULL; + struct commit *seen_gen_non_zero = NULL; verify_commit_graph_error = verify_commit_graph_lite(g); if (verify_commit_graph_error) @@ -2659,7 +2697,7 @@ static int verify_one_commit_graph(struct repository *r, oid_to_hex(&graph_parents->item->object.oid), oid_to_hex(&odb_parents->item->object.oid)); - generation = commit_graph_generation(graph_parents->item); + generation = commit_graph_generation_from_graph(graph_parents->item); if (generation > max_generation) max_generation = generation; @@ -2671,16 +2709,12 @@ static int verify_one_commit_graph(struct repository *r, graph_report(_("commit-graph parent list for commit %s terminates early"), oid_to_hex(&cur_oid)); - if (!commit_graph_generation(graph_commit)) { - 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 (commit_graph_generation_from_graph(graph_commit)) + seen_gen_non_zero = graph_commit; + else + seen_gen_zero = graph_commit; - if (generation_zero == GENERATION_ZERO_EXISTS) + if (seen_gen_zero) continue; /* @@ -2706,6 +2740,12 @@ static int verify_one_commit_graph(struct repository *r, odb_commit->date); } + if (seen_gen_zero && seen_gen_non_zero) + graph_report(_("commit-graph has both zero and non-zero " + "generations (e.g., commits '%s' and '%s')"), + oid_to_hex(&seen_gen_zero->object.oid), + oid_to_hex(&seen_gen_non_zero->object.oid)); + return verify_commit_graph_error; } |