git/commit.c at master · Andres-GC/git · GitHub

History

1821 lines (1581 loc) · 44.7 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

#include "cache.h"

#include "tag.h"

#include "commit.h"

#include "commit-graph.h"

#include "repository.h"

#include "object-store.h"

#include "pkt-line.h"

#include "utf8.h"

#include "diff.h"

#include "revision.h"

#include "notes.h"

#include "alloc.h"

#include "gpg-interface.h"

#include "mergesort.h"

#include "commit-slab.h"

#include "prio-queue.h"

#include "sha1-lookup.h"

#include "wt-status.h"

#include "advice.h"

static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);

int save_commit_buffer = 1;

const char *commit_type = "commit";

struct commit *lookup_commit_reference_gently(struct repository *r,

const struct object_id *oid, int quiet)

{

struct object *obj = deref_tag(r,

parse_object(r, oid),

NULL, 0);

if (!obj)

return NULL;

return object_as_type(r, obj, OBJ_COMMIT, quiet);

}

struct commit *lookup_commit_reference(struct repository *r, const struct object_id *oid)

{

return lookup_commit_reference_gently(r, oid, 0);

}

struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name)

{

struct commit *c = lookup_commit_reference(the_repository, oid);

if (!c)

die(_("could not parse %s"), ref_name);

if (oidcmp(oid, &c->object.oid)) {

warning(_("%s %s is not a commit!"),

ref_name, oid_to_hex(oid));

}

return c;

}

struct commit *lookup_commit(struct repository *r, const struct object_id *oid)

{

struct object *obj = lookup_object(r, oid->hash);

if (!obj)

return create_object(r, oid->hash,

alloc_commit_node(r));

return object_as_type(r, obj, OBJ_COMMIT, 0);

}

struct commit *lookup_commit_reference_by_name(const char *name)

{

struct object_id oid;

struct commit *commit;

if (get_oid_committish(name, &oid))

return NULL;

commit = lookup_commit_reference(the_repository, &oid);

if (parse_commit(commit))

return NULL;

return commit;

}

static timestamp_t parse_commit_date(const char *buf, const char *tail)

{

const char *dateptr;

if (buf + 6 >= tail)

return 0;

if (memcmp(buf, "author", 6))

return 0;

while (buf < tail && *buf++ != '\n')

/* nada */;

if (buf + 9 >= tail)

return 0;

if (memcmp(buf, "committer", 9))

return 0;

while (buf < tail && *buf++ != '>')

/* nada */;

if (buf >= tail)

return 0;

dateptr = buf;

while (buf < tail && *buf++ != '\n')

/* nada */;

if (buf >= tail)

return 0;

/* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */

return parse_timestamp(dateptr, NULL, 10);

}

static const unsigned char *commit_graft_sha1_access(size_t index, void *table)

{

struct commit_graft **commit_graft_table = table;

return commit_graft_table[index]->oid.hash;

}

static int commit_graft_pos(struct repository *r, const unsigned char *sha1)

{

return sha1_pos(sha1, r->parsed_objects->grafts,

r->parsed_objects->grafts_nr,

commit_graft_sha1_access);

}

int register_commit_graft(struct repository *r, struct commit_graft *graft,

int ignore_dups)

{

int pos = commit_graft_pos(r, graft->oid.hash);

if (0 <= pos) {

if (ignore_dups)

free(graft);

else {

free(r->parsed_objects->grafts[pos]);

r->parsed_objects->grafts[pos] = graft;

}

return 1;

}

pos = -pos - 1;

ALLOC_GROW(r->parsed_objects->grafts,

r->parsed_objects->grafts_nr + 1,

r->parsed_objects->grafts_alloc);

r->parsed_objects->grafts_nr++;

if (pos < r->parsed_objects->grafts_nr)

memmove(r->parsed_objects->grafts + pos + 1,

r->parsed_objects->grafts + pos,

(r->parsed_objects->grafts_nr - pos - 1) *

sizeof(*r->parsed_objects->grafts));

r->parsed_objects->grafts[pos] = graft;

return 0;

}

struct commit_graft *read_graft_line(struct strbuf *line)

{

/* The format is just "Commit Parent1 Parent2 ...\n" */

int i, phase;

const char *tail = NULL;

struct commit_graft *graft = NULL;

struct object_id dummy_oid, *oid;

strbuf_rtrim(line);

if (!line->len || line->buf[0] == '#')

return NULL;

* phase 0 verifies line, counts hashes in line and allocates graft

* phase 1 fills graft

for (phase = 0; phase < 2; phase++) {

oid = graft ? &graft->oid : &dummy_oid;

if (parse_oid_hex(line->buf, oid, &tail))

goto bad_graft_data;

for (i = 0; *tail != '\0'; i++) {

oid = graft ? &graft->parent[i] : &dummy_oid;

if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail))

goto bad_graft_data;

}

if (!graft) {

graft = xmalloc(st_add(sizeof(*graft),

st_mult(sizeof(struct object_id), i)));

graft->nr_parent = i;

}

return graft;

bad_graft_data:

error("bad graft data: %s", line->buf);

assert(!graft);

return NULL;

}

static int read_graft_file(struct repository *r, const char *graft_file)

{

FILE *fp = fopen_or_warn(graft_file, "r");

struct strbuf buf = STRBUF_INIT;

if (!fp)

return -1;

if (advice_graft_file_deprecated)

advise(_("Support for <GIT_DIR>/info/grafts is deprecated\n"

"and will be removed in a future Git version.\n"

"\n"

"Please use \"git replace --convert-graft-file\"\n"

"to convert the grafts into replace refs.\n"

"\n"

"Turn this message off by running\n"

"\"git config advice.graftFileDeprecated false\""));

while (!strbuf_getwholeline(&buf, fp, '\n')) {

/* The format is just "Commit Parent1 Parent2 ...\n" */

struct commit_graft *graft = read_graft_line(&buf);

if (!graft)

continue;

if (register_commit_graft(r, graft, 1))

error("duplicate graft data: %s", buf.buf);

}

fclose(fp);

strbuf_release(&buf);

return 0;

}

static void prepare_commit_graft(struct repository *r)

{

char *graft_file;

if (r->parsed_objects->commit_graft_prepared)

return;

if (!startup_info->have_repository)

return;

graft_file = get_graft_file(r);

read_graft_file(r, graft_file);

/* make sure shallows are read */

is_repository_shallow(r);

r->parsed_objects->commit_graft_prepared = 1;

}

struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid)

{

int pos;

prepare_commit_graft(r);

pos = commit_graft_pos(r, oid->hash);

if (pos < 0)

return NULL;

return r->parsed_objects->grafts[pos];

}

int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data)

{

int i, ret;

for (i = ret = 0; i < the_repository->parsed_objects->grafts_nr && !ret; i++)

ret = fn(the_repository->parsed_objects->grafts[i], cb_data);

return ret;

}

int unregister_shallow(const struct object_id *oid)

{

int pos = commit_graft_pos(the_repository, oid->hash);

if (pos < 0)

return -1;

if (pos + 1 < the_repository->parsed_objects->grafts_nr)

MOVE_ARRAY(the_repository->parsed_objects->grafts + pos,

the_repository->parsed_objects->grafts + pos + 1,

the_repository->parsed_objects->grafts_nr - pos - 1);

the_repository->parsed_objects->grafts_nr--;

return 0;

}

struct commit_buffer {

void *buffer;

unsigned long size;

};

define_commit_slab(buffer_slab, struct commit_buffer);

struct buffer_slab *allocate_commit_buffer_slab(void)

{

struct buffer_slab *bs = xmalloc(sizeof(*bs));

init_buffer_slab(bs);

return bs;

}

void free_commit_buffer_slab(struct buffer_slab *bs)

{

clear_buffer_slab(bs);

free(bs);

}

void set_commit_buffer(struct repository *r, struct commit *commit, void *buffer, unsigned long size)

{

struct commit_buffer *v = buffer_slab_at(

r->parsed_objects->buffer_slab, commit);

v->buffer = buffer;

v->size = size;

}

const void *get_cached_commit_buffer(struct repository *r, const struct commit *commit, unsigned long *sizep)

{

struct commit_buffer *v = buffer_slab_peek(

r->parsed_objects->buffer_slab, commit);

if (!v) {

if (sizep)

*sizep = 0;

return NULL;

}

if (sizep)

*sizep = v->size;

return v->buffer;

}

const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep)

{

const void *ret = get_cached_commit_buffer(the_repository, commit, sizep);

if (!ret) {

enum object_type type;

unsigned long size;

ret = read_object_file(&commit->object.oid, &type, &size);

if (!ret)

die("cannot read commit object %s",

oid_to_hex(&commit->object.oid));

if (type != OBJ_COMMIT)

die("expected commit for %s, got %s",

oid_to_hex(&commit->object.oid), type_name(type));

if (sizep)

*sizep = size;

}

return ret;

}

void unuse_commit_buffer(const struct commit *commit, const void *buffer)

{

struct commit_buffer *v = buffer_slab_peek(

the_repository->parsed_objects->buffer_slab, commit);

if (!(v && v->buffer == buffer))

free((void *)buffer);

}

void free_commit_buffer(struct commit *commit)

{

struct commit_buffer *v = buffer_slab_peek(

the_repository->parsed_objects->buffer_slab, commit);

if (v) {

FREE_AND_NULL(v->buffer);

v->size = 0;

}

struct tree *get_commit_tree(const struct commit *commit)

{

if (commit->maybe_tree || !commit->object.parsed)

return commit->maybe_tree;

if (commit->graph_pos == COMMIT_NOT_FROM_GRAPH)

BUG("commit has NULL tree, but was not loaded from commit-graph");

return get_commit_tree_in_graph(the_repository, commit);

}

struct object_id *get_commit_tree_oid(const struct commit *commit)

{

return &get_commit_tree(commit)->object.oid;

}

void release_commit_memory(struct commit *c)

{

c->maybe_tree = NULL;

c->index = 0;

free_commit_buffer(c);

free_commit_list(c->parents);

/* TODO: what about commit->util? */

c->object.parsed = 0;

}

const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep)

{

struct commit_buffer *v = buffer_slab_peek(

the_repository->parsed_objects->buffer_slab, commit);

void *ret;

if (!v) {

if (sizep)

*sizep = 0;

return NULL;

}

ret = v->buffer;

if (sizep)

*sizep = v->size;

v->buffer = NULL;

v->size = 0;

return ret;

}

int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph)

{

const char *tail = buffer;

const char *bufptr = buffer;

struct object_id parent;

struct commit_list **pptr;

struct commit_graft *graft;

const int tree_entry_len = the_hash_algo->hexsz + 5;

const int parent_entry_len = the_hash_algo->hexsz + 7;

if (item->object.parsed)

return 0;

item->object.parsed = 1;

tail += size;

if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) ||

bufptr[tree_entry_len] != '\n')

return error("bogus commit object %s", oid_to_hex(&item->object.oid));

if (get_oid_hex(bufptr + 5, &parent) < 0)

return error("bad tree pointer in commit %s",

oid_to_hex(&item->object.oid));

item->maybe_tree = lookup_tree(r, &parent);

bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */

pptr = &item->parents;

graft = lookup_commit_graft(r, &item->object.oid);

while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) {

struct commit *new_parent;

if (tail <= bufptr + parent_entry_len + 1 ||

get_oid_hex(bufptr + 7, &parent) ||

bufptr[parent_entry_len] != '\n')

return error("bad parents in commit %s", oid_to_hex(&item->object.oid));

bufptr += parent_entry_len + 1;

* The clone is shallow if nr_parent < 0, and we must

* not traverse its real parents even when we unhide them.

if (graft && (graft->nr_parent < 0 || grafts_replace_parents))

continue;

new_parent = lookup_commit(r, &parent);

if (new_parent)

pptr = &commit_list_insert(new_parent, pptr)->next;

}

if (graft) {

int i;

struct commit *new_parent;

for (i = 0; i < graft->nr_parent; i++) {

new_parent = lookup_commit(r,

&graft->parent[i]);

if (!new_parent)

continue;

pptr = &commit_list_insert(new_parent, pptr)->next;

}

item->date = parse_commit_date(bufptr, tail);

if (check_graph)

load_commit_graph_info(the_repository, item);

return 0;

}

int parse_commit_internal(struct commit *item, int quiet_on_missing, int use_commit_graph)

{

enum object_type type;

void *buffer;

unsigned long size;

int ret;

if (!item)

return -1;

if (item->object.parsed)

return 0;

if (use_commit_graph && parse_commit_in_graph(the_repository, item))

return 0;

buffer = read_object_file(&item->object.oid, &type, &size);

if (!buffer)

return quiet_on_missing ? -1 :

error("Could not read %s",

oid_to_hex(&item->object.oid));

if (type != OBJ_COMMIT) {

free(buffer);

return error("Object %s not a commit",

oid_to_hex(&item->object.oid));

}

ret = parse_commit_buffer(the_repository, item, buffer, size, 0);

if (save_commit_buffer && !ret) {

set_commit_buffer(the_repository, item, buffer, size);

return 0;

}

free(buffer);

return ret;

}

int parse_commit_gently(struct commit *item, int quiet_on_missing)

{

return parse_commit_internal(item, quiet_on_missing, 1);

}

void parse_commit_or_die(struct commit *item)

{

if (parse_commit(item))

die("unable to parse commit %s",

item ? oid_to_hex(&item->object.oid) : "(null)");

}

int find_commit_subject(const char *commit_buffer, const char **subject)

{

const char *eol;

const char *p = commit_buffer;

while (*p && (*p != '\n' || p[1] != '\n'))

p++;

if (*p) {

p = skip_blank_lines(p + 2);

eol = strchrnul(p, '\n');

} else

eol = p;

*subject = p;

return eol - p;

}

struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)

{

struct commit_list *new_list = xmalloc(sizeof(struct commit_list));

new_list->item = item;

new_list->next = *list_p;

*list_p = new_list;

return new_list;

}

unsigned commit_list_count(const struct commit_list *l)

{

unsigned c = 0;

for (; l; l = l->next )

c++;

return c;

}

struct commit_list *copy_commit_list(struct commit_list *list)

{

struct commit_list *head = NULL;

struct commit_list **pp = &head;

while (list) {

pp = commit_list_append(list->item, pp);

list = list->next;

}

return head;

}

void free_commit_list(struct commit_list *list)

{

while (list)

pop_commit(&list);

}

struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list)

{

struct commit_list **pp = list;

struct commit_list *p;

while ((p = *pp) != NULL) {

if (p->item->date < item->date) {

break;

}

pp = &p->next;

}

return commit_list_insert(item, pp);

}

static int commit_list_compare_by_date(const void *a, const void *b)

{

timestamp_t a_date = ((const struct commit_list *)a)->item->date;

timestamp_t b_date = ((const struct commit_list *)b)->item->date;

if (a_date < b_date)

return 1;

if (a_date > b_date)

return -1;

return 0;

}

static void *commit_list_get_next(const void *a)

{

return ((const struct commit_list *)a)->next;

}

static void commit_list_set_next(void *a, void *next)

{

((struct commit_list *)a)->next = next;

}

void commit_list_sort_by_date(struct commit_list **list)

{

*list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next,

commit_list_compare_by_date);

}

struct commit *pop_most_recent_commit(struct commit_list **list,

unsigned int mark)

{

struct commit *ret = pop_commit(list);

struct commit_list *parents = ret->parents;

while (parents) {

struct commit *commit = parents->item;

if (!parse_commit(commit) && !(commit->object.flags & mark)) {

commit->object.flags |= mark;

commit_list_insert_by_date(commit, list);

}

parents = parents->next;

}

return ret;

}

static void clear_commit_marks_1(struct commit_list **plist,

struct commit *commit, unsigned int mark)

{

while (commit) {

struct commit_list *parents;

if (!(mark & commit->object.flags))

return;

commit->object.flags &= ~mark;

parents = commit->parents;

if (!parents)

return;

while ((parents = parents->next))

commit_list_insert(parents->item, plist);

commit = commit->parents->item;

}

void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark)

{

struct commit_list *list = NULL;

while (nr--) {

clear_commit_marks_1(&list, *commit, mark);

commit++;

}

while (list)

clear_commit_marks_1(&list, pop_commit(&list), mark);

}

void clear_commit_marks(struct commit *commit, unsigned int mark)

{

clear_commit_marks_many(1, &commit, mark);

}

struct commit *pop_commit(struct commit_list **stack)

{

struct commit_list *top = *stack;

struct commit *item = top ? top->item : NULL;

if (top) {

*stack = top->next;

free(top);

}

return item;

}

* Topological sort support

/* count number of children that have not been emitted */

define_commit_slab(indegree_slab, int);

/* record author-date for each commit object */

define_commit_slab(author_date_slab, unsigned long);

static void record_author_date(struct author_date_slab *author_date,

struct commit *commit)

{

const char *buffer = get_commit_buffer(commit, NULL);

struct ident_split ident;

const char *ident_line;

size_t ident_len;

char *date_end;

timestamp_t date;

ident_line = find_commit_header(buffer, "author", &ident_len);

if (!ident_line)

goto fail_exit; /* no author line */

if (split_ident_line(&ident, ident_line, ident_len) ||

!ident.date_begin || !ident.date_end)

goto fail_exit; /* malformed "author" line */

date = parse_timestamp(ident.date_begin, &date_end, 10);

if (date_end != ident.date_end)

goto fail_exit; /* malformed date */

*(author_date_slab_at(author_date, commit)) = date;

fail_exit:

unuse_commit_buffer(commit, buffer);

}

static int compare_commits_by_author_date(const void *a_, const void *b_,

void *cb_data)

{

const struct commit *a = a_, *b = b_;

struct author_date_slab *author_date = cb_data;

timestamp_t a_date = *(author_date_slab_at(author_date, a));

timestamp_t b_date = *(author_date_slab_at(author_date, b));

/* newer commits with larger date first */

if (a_date < b_date)

return 1;

else if (a_date > b_date)

return -1;

return 0;

}

int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused)

{

const struct commit *a = a_, *b = b_;

/* newer commits first */

if (a->generation < b->generation)

return 1;

else if (a->generation > b->generation)

return -1;

/* use date as a heuristic when generations are equal */

if (a->date < b->date)

return 1;

else if (a->date > b->date)

return -1;

return 0;

}

int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused)

{

const struct commit *a = a_, *b = b_;

/* newer commits with larger date first */

if (a->date < b->date)

return 1;

else if (a->date > b->date)

return -1;

return 0;

}

* Performs an in-place topological sort on the list supplied.

void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order)

{

struct commit_list *next, *orig = *list;

struct commit_list **pptr;

struct indegree_slab indegree;

struct prio_queue queue;

struct commit *commit;

struct author_date_slab author_date;

if (!orig)

return;

*list = NULL;

init_indegree_slab(&indegree);

memset(&queue, '\0', sizeof(queue));

switch (sort_order) {

default: /* REV_SORT_IN_GRAPH_ORDER */

queue.compare = NULL;

break;

case REV_SORT_BY_COMMIT_DATE:

queue.compare = compare_commits_by_commit_date;

break;

case REV_SORT_BY_AUTHOR_DATE:

init_author_date_slab(&author_date);

queue.compare = compare_commits_by_author_date;

queue.cb_data = &author_date;

break;

}

/* Mark them and clear the indegree */

for (next = orig; next; next = next->next) {

struct commit *commit = next->item;

*(indegree_slab_at(&indegree, commit)) = 1;

/* also record the author dates, if needed */

if (sort_order == REV_SORT_BY_AUTHOR_DATE)

record_author_date(&author_date, commit);

}

/* update the indegree */

for (next = orig; next; next = next->next) {

struct commit_list *parents = next->item->parents;

while (parents) {

struct commit *parent = parents->item;

int *pi = indegree_slab_at(&indegree, parent);

if (*pi)

(*pi)++;

parents = parents->next;

}

* find the tips

* tips are nodes not reachable from any other node in the list

* the tips serve as a starting set for the work queue.

for (next = orig; next; next = next->next) {

struct commit *commit = next->item;

if (*(indegree_slab_at(&indegree, commit)) == 1)

prio_queue_put(&queue, commit);

}

* This is unfortunate; the initial tips need to be shown

* in the order given from the revision traversal machinery.

if (sort_order == REV_SORT_IN_GRAPH_ORDER)

prio_queue_reverse(&queue);

/* We no longer need the commit list */

free_commit_list(orig);

pptr = list;

*list = NULL;

while ((commit = prio_queue_get(&queue)) != NULL) {

struct commit_list *parents;

for (parents = commit->parents; parents ; parents = parents->next) {

struct commit *parent = parents->item;

int *pi = indegree_slab_at(&indegree, parent);

if (!*pi)

continue;

* parents are only enqueued for emission

* when all their children have been emitted thereby

* guaranteeing topological order.

if (--(*pi) == 1)

prio_queue_put(&queue, parent);

}

* all children of commit have already been

* emitted. we can emit it now.

*(indegree_slab_at(&indegree, commit)) = 0;

pptr = &commit_list_insert(commit, pptr)->next;

}

clear_indegree_slab(&indegree);

clear_prio_queue(&queue);

if (sort_order == REV_SORT_BY_AUTHOR_DATE)

clear_author_date_slab(&author_date);

}

/* merge-base stuff */

/* Remember to update object flag allocation in object.h */

#define PARENT1 (1u<<16)

#define PARENT2 (1u<<17)

#define STALE (1u<<18)

#define RESULT (1u<<19)

static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);

static int queue_has_nonstale(struct prio_queue *queue)

{

int i;

for (i = 0; i < queue->nr; i++) {

struct commit *commit = queue->array[i].data;

if (!(commit->object.flags & STALE))

return 1;

}

return 0;

}

/* all input commits in one and twos[] must have been parsed! */

static struct commit_list *paint_down_to_common(struct commit *one, int n,

struct commit **twos,

int min_generation)

{

struct prio_queue queue = { compare_commits_by_gen_then_commit_date };

struct commit_list *result = NULL;

int i;

uint32_t last_gen = GENERATION_NUMBER_INFINITY;

one->object.flags |= PARENT1;

if (!n) {

commit_list_append(one, &result);

return result;

}

prio_queue_put(&queue, one);

for (i = 0; i < n; i++) {

twos[i]->object.flags |= PARENT2;

prio_queue_put(&queue, twos[i]);

}

while (queue_has_nonstale(&queue)) {

struct commit *commit = prio_queue_get(&queue);

struct commit_list *parents;

int flags;

if (commit->generation > last_gen)

BUG("bad generation skip %8x > %8x at %s",

commit->generation, last_gen,

oid_to_hex(&commit->object.oid));

last_gen = commit->generation;

if (commit->generation < min_generation)

break;

flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);

if (flags == (PARENT1 | PARENT2)) {

if (!(commit->object.flags & RESULT)) {

commit->object.flags |= RESULT;

commit_list_insert_by_date(commit, &result);

}

/* Mark parents of a found merge stale */

flags |= STALE;

}

parents = commit->parents;

while (parents) {

struct commit *p = parents->item;

parents = parents->next;

if ((p->object.flags & flags) == flags)

continue;

if (parse_commit(p))

return NULL;

p->object.flags |= flags;

prio_queue_put(&queue, p);

}

clear_prio_queue(&queue);

return result;

}

static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos)

{

struct commit_list *list = NULL;

struct commit_list *result = NULL;

int i;

for (i = 0; i < n; i++) {

if (one == twos[i])

* We do not mark this even with RESULT so we do not

* have to clean it up.

return commit_list_insert(one, &result);

}

if (parse_commit(one))

return NULL;

for (i = 0; i < n; i++) {

if (parse_commit(twos[i]))

return NULL;

}

list = paint_down_to_common(one, n, twos, 0);

while (list) {

struct commit *commit = pop_commit(&list);

if (!(commit->object.flags & STALE))

commit_list_insert_by_date(commit, &result);

}

return result;

}

struct commit_list *get_octopus_merge_bases(struct commit_list *in)

{

struct commit_list *i, *j, *k, *ret = NULL;

if (!in)

return ret;

commit_list_insert(in->item, &ret);

for (i = in->next; i; i = i->next) {

struct commit_list *new_commits = NULL, *end = NULL;

for (j = ret; j; j = j->next) {

struct commit_list *bases;

bases = get_merge_bases(i->item, j->item);

if (!new_commits)

new_commits = bases;

else

end->next = bases;

for (k = bases; k; k = k->next)

end = k;

}

ret = new_commits;

}

return ret;

}

static int remove_redundant(struct commit **array, int cnt)

{

* Some commit in the array may be an ancestor of

* another commit. Move such commit to the end of

* the array, and return the number of commits that

* are independent from each other.

struct commit **work;

unsigned char *redundant;

int *filled_index;

int i, j, filled;

View remainder of file in raw view

git/commit.c at master · Andres-GC/git · GitHub

Expand file tree

Breadcrumbs

commit.c

Latest commit

History

Breadcrumbs

commit.c

File metadata and controls