1/* 2 * Builtin "git am" 3 * 4 * Based on git-am.sh by Junio C Hamano. 5 */ 6#include"cache.h" 7#include"config.h" 8#include"builtin.h" 9#include"exec_cmd.h" 10#include"parse-options.h" 11#include"dir.h" 12#include"run-command.h" 13#include"quote.h" 14#include"tempfile.h" 15#include"lockfile.h" 16#include"cache-tree.h" 17#include"refs.h" 18#include"commit.h" 19#include"diff.h" 20#include"diffcore.h" 21#include"unpack-trees.h" 22#include"branch.h" 23#include"sequencer.h" 24#include"revision.h" 25#include"merge-recursive.h" 26#include"revision.h" 27#include"log-tree.h" 28#include"notes-utils.h" 29#include"rerere.h" 30#include"prompt.h" 31#include"mailinfo.h" 32#include"apply.h" 33#include"string-list.h" 34#include"packfile.h" 35 36/** 37 * Returns 1 if the file is empty or does not exist, 0 otherwise. 38 */ 39static intis_empty_file(const char*filename) 40{ 41struct stat st; 42 43if(stat(filename, &st) <0) { 44if(errno == ENOENT) 45return1; 46die_errno(_("could not stat%s"), filename); 47} 48 49return!st.st_size; 50} 51 52/** 53 * Returns the length of the first line of msg. 54 */ 55static intlinelen(const char*msg) 56{ 57returnstrchrnul(msg,'\n') - msg; 58} 59 60/** 61 * Returns true if `str` consists of only whitespace, false otherwise. 62 */ 63static intstr_isspace(const char*str) 64{ 65for(; *str; str++) 66if(!isspace(*str)) 67return0; 68 69return1; 70} 71 72enum patch_format { 73 PATCH_FORMAT_UNKNOWN =0, 74 PATCH_FORMAT_MBOX, 75 PATCH_FORMAT_STGIT, 76 PATCH_FORMAT_STGIT_SERIES, 77 PATCH_FORMAT_HG, 78 PATCH_FORMAT_MBOXRD 79}; 80 81enum keep_type { 82 KEEP_FALSE =0, 83 KEEP_TRUE,/* pass -k flag to git-mailinfo */ 84 KEEP_NON_PATCH /* pass -b flag to git-mailinfo */ 85}; 86 87enum scissors_type { 88 SCISSORS_UNSET = -1, 89 SCISSORS_FALSE =0,/* pass --no-scissors to git-mailinfo */ 90 SCISSORS_TRUE /* pass --scissors to git-mailinfo */ 91}; 92 93enum signoff_type { 94 SIGNOFF_FALSE =0, 95 SIGNOFF_TRUE =1, 96 SIGNOFF_EXPLICIT /* --signoff was set on the command-line */ 97}; 98 99struct am_state { 100/* state directory path */ 101char*dir; 102 103/* current and last patch numbers, 1-indexed */ 104int cur; 105int last; 106 107/* commit metadata and message */ 108char*author_name; 109char*author_email; 110char*author_date; 111char*msg; 112size_t msg_len; 113 114/* when --rebasing, records the original commit the patch came from */ 115struct object_id orig_commit; 116 117/* number of digits in patch filename */ 118int prec; 119 120/* various operating modes and command line options */ 121int interactive; 122int threeway; 123int quiet; 124int signoff;/* enum signoff_type */ 125int utf8; 126int keep;/* enum keep_type */ 127int message_id; 128int scissors;/* enum scissors_type */ 129struct argv_array git_apply_opts; 130const char*resolvemsg; 131int committer_date_is_author_date; 132int ignore_date; 133int allow_rerere_autoupdate; 134const char*sign_commit; 135int rebasing; 136}; 137 138/** 139 * Initializes am_state with the default values. 140 */ 141static voidam_state_init(struct am_state *state) 142{ 143int gpgsign; 144 145memset(state,0,sizeof(*state)); 146 147 state->dir =git_pathdup("rebase-apply"); 148 149 state->prec =4; 150 151git_config_get_bool("am.threeway", &state->threeway); 152 153 state->utf8 =1; 154 155git_config_get_bool("am.messageid", &state->message_id); 156 157 state->scissors = SCISSORS_UNSET; 158 159argv_array_init(&state->git_apply_opts); 160 161if(!git_config_get_bool("commit.gpgsign", &gpgsign)) 162 state->sign_commit = gpgsign ?"": NULL; 163} 164 165/** 166 * Releases memory allocated by an am_state. 167 */ 168static voidam_state_release(struct am_state *state) 169{ 170free(state->dir); 171free(state->author_name); 172free(state->author_email); 173free(state->author_date); 174free(state->msg); 175argv_array_clear(&state->git_apply_opts); 176} 177 178/** 179 * Returns path relative to the am_state directory. 180 */ 181staticinlineconst char*am_path(const struct am_state *state,const char*path) 182{ 183returnmkpath("%s/%s", state->dir, path); 184} 185 186/** 187 * For convenience to call write_file() 188 */ 189static voidwrite_state_text(const struct am_state *state, 190const char*name,const char*string) 191{ 192write_file(am_path(state, name),"%s", string); 193} 194 195static voidwrite_state_count(const struct am_state *state, 196const char*name,int value) 197{ 198write_file(am_path(state, name),"%d", value); 199} 200 201static voidwrite_state_bool(const struct am_state *state, 202const char*name,int value) 203{ 204write_state_text(state, name, value ?"t":"f"); 205} 206 207/** 208 * If state->quiet is false, calls fprintf(fp, fmt, ...), and appends a newline 209 * at the end. 210 */ 211static voidsay(const struct am_state *state,FILE*fp,const char*fmt, ...) 212{ 213va_list ap; 214 215va_start(ap, fmt); 216if(!state->quiet) { 217vfprintf(fp, fmt, ap); 218putc('\n', fp); 219} 220va_end(ap); 221} 222 223/** 224 * Returns 1 if there is an am session in progress, 0 otherwise. 225 */ 226static intam_in_progress(const struct am_state *state) 227{ 228struct stat st; 229 230if(lstat(state->dir, &st) <0|| !S_ISDIR(st.st_mode)) 231return0; 232if(lstat(am_path(state,"last"), &st) || !S_ISREG(st.st_mode)) 233return0; 234if(lstat(am_path(state,"next"), &st) || !S_ISREG(st.st_mode)) 235return0; 236return1; 237} 238 239/** 240 * Reads the contents of `file` in the `state` directory into `sb`. Returns the 241 * number of bytes read on success, -1 if the file does not exist. If `trim` is 242 * set, trailing whitespace will be removed. 243 */ 244static intread_state_file(struct strbuf *sb,const struct am_state *state, 245const char*file,int trim) 246{ 247strbuf_reset(sb); 248 249if(strbuf_read_file(sb,am_path(state, file),0) >=0) { 250if(trim) 251strbuf_trim(sb); 252 253return sb->len; 254} 255 256if(errno == ENOENT) 257return-1; 258 259die_errno(_("could not read '%s'"),am_path(state, file)); 260} 261 262/** 263 * Take a series of KEY='VALUE' lines where VALUE part is 264 * sq-quoted, and append <KEY, VALUE> at the end of the string list 265 */ 266static intparse_key_value_squoted(char*buf,struct string_list *list) 267{ 268while(*buf) { 269struct string_list_item *item; 270char*np; 271char*cp =strchr(buf,'='); 272if(!cp) 273return-1; 274 np =strchrnul(cp,'\n'); 275*cp++ ='\0'; 276 item =string_list_append(list, buf); 277 278 buf = np + (*np =='\n'); 279*np ='\0'; 280 cp =sq_dequote(cp); 281if(!cp) 282return-1; 283 item->util =xstrdup(cp); 284} 285return0; 286} 287 288/** 289 * Reads and parses the state directory's "author-script" file, and sets 290 * state->author_name, state->author_email and state->author_date accordingly. 291 * Returns 0 on success, -1 if the file could not be parsed. 292 * 293 * The author script is of the format: 294 * 295 * GIT_AUTHOR_NAME='$author_name' 296 * GIT_AUTHOR_EMAIL='$author_email' 297 * GIT_AUTHOR_DATE='$author_date' 298 * 299 * where $author_name, $author_email and $author_date are quoted. We are strict 300 * with our parsing, as the file was meant to be eval'd in the old git-am.sh 301 * script, and thus if the file differs from what this function expects, it is 302 * better to bail out than to do something that the user does not expect. 303 */ 304static intread_author_script(struct am_state *state) 305{ 306const char*filename =am_path(state,"author-script"); 307struct strbuf buf = STRBUF_INIT; 308struct string_list kv = STRING_LIST_INIT_DUP; 309int retval = -1;/* assume failure */ 310int fd; 311 312assert(!state->author_name); 313assert(!state->author_email); 314assert(!state->author_date); 315 316 fd =open(filename, O_RDONLY); 317if(fd <0) { 318if(errno == ENOENT) 319return0; 320die_errno(_("could not open '%s' for reading"), filename); 321} 322strbuf_read(&buf, fd,0); 323close(fd); 324if(parse_key_value_squoted(buf.buf, &kv)) 325goto finish; 326 327if(kv.nr !=3|| 328strcmp(kv.items[0].string,"GIT_AUTHOR_NAME") || 329strcmp(kv.items[1].string,"GIT_AUTHOR_EMAIL") || 330strcmp(kv.items[2].string,"GIT_AUTHOR_DATE")) 331goto finish; 332 state->author_name = kv.items[0].util; 333 state->author_email = kv.items[1].util; 334 state->author_date = kv.items[2].util; 335 retval =0; 336finish: 337string_list_clear(&kv, !!retval); 338strbuf_release(&buf); 339return retval; 340} 341 342/** 343 * Saves state->author_name, state->author_email and state->author_date in the 344 * state directory's "author-script" file. 345 */ 346static voidwrite_author_script(const struct am_state *state) 347{ 348struct strbuf sb = STRBUF_INIT; 349 350strbuf_addstr(&sb,"GIT_AUTHOR_NAME="); 351sq_quote_buf(&sb, state->author_name); 352strbuf_addch(&sb,'\n'); 353 354strbuf_addstr(&sb,"GIT_AUTHOR_EMAIL="); 355sq_quote_buf(&sb, state->author_email); 356strbuf_addch(&sb,'\n'); 357 358strbuf_addstr(&sb,"GIT_AUTHOR_DATE="); 359sq_quote_buf(&sb, state->author_date); 360strbuf_addch(&sb,'\n'); 361 362write_state_text(state,"author-script", sb.buf); 363 364strbuf_release(&sb); 365} 366 367/** 368 * Reads the commit message from the state directory's "final-commit" file, 369 * setting state->msg to its contents and state->msg_len to the length of its 370 * contents in bytes. 371 * 372 * Returns 0 on success, -1 if the file does not exist. 373 */ 374static intread_commit_msg(struct am_state *state) 375{ 376struct strbuf sb = STRBUF_INIT; 377 378assert(!state->msg); 379 380if(read_state_file(&sb, state,"final-commit",0) <0) { 381strbuf_release(&sb); 382return-1; 383} 384 385 state->msg =strbuf_detach(&sb, &state->msg_len); 386return0; 387} 388 389/** 390 * Saves state->msg in the state directory's "final-commit" file. 391 */ 392static voidwrite_commit_msg(const struct am_state *state) 393{ 394const char*filename =am_path(state,"final-commit"); 395write_file_buf(filename, state->msg, state->msg_len); 396} 397 398/** 399 * Loads state from disk. 400 */ 401static voidam_load(struct am_state *state) 402{ 403struct strbuf sb = STRBUF_INIT; 404 405if(read_state_file(&sb, state,"next",1) <0) 406die("BUG: state file 'next' does not exist"); 407 state->cur =strtol(sb.buf, NULL,10); 408 409if(read_state_file(&sb, state,"last",1) <0) 410die("BUG: state file 'last' does not exist"); 411 state->last =strtol(sb.buf, NULL,10); 412 413if(read_author_script(state) <0) 414die(_("could not parse author script")); 415 416read_commit_msg(state); 417 418if(read_state_file(&sb, state,"original-commit",1) <0) 419oidclr(&state->orig_commit); 420else if(get_oid_hex(sb.buf, &state->orig_commit) <0) 421die(_("could not parse%s"),am_path(state,"original-commit")); 422 423read_state_file(&sb, state,"threeway",1); 424 state->threeway = !strcmp(sb.buf,"t"); 425 426read_state_file(&sb, state,"quiet",1); 427 state->quiet = !strcmp(sb.buf,"t"); 428 429read_state_file(&sb, state,"sign",1); 430 state->signoff = !strcmp(sb.buf,"t"); 431 432read_state_file(&sb, state,"utf8",1); 433 state->utf8 = !strcmp(sb.buf,"t"); 434 435if(file_exists(am_path(state,"rerere-autoupdate"))) { 436read_state_file(&sb, state,"rerere-autoupdate",1); 437 state->allow_rerere_autoupdate =strcmp(sb.buf,"t") ? 438 RERERE_NOAUTOUPDATE : RERERE_AUTOUPDATE; 439}else{ 440 state->allow_rerere_autoupdate =0; 441} 442 443read_state_file(&sb, state,"keep",1); 444if(!strcmp(sb.buf,"t")) 445 state->keep = KEEP_TRUE; 446else if(!strcmp(sb.buf,"b")) 447 state->keep = KEEP_NON_PATCH; 448else 449 state->keep = KEEP_FALSE; 450 451read_state_file(&sb, state,"messageid",1); 452 state->message_id = !strcmp(sb.buf,"t"); 453 454read_state_file(&sb, state,"scissors",1); 455if(!strcmp(sb.buf,"t")) 456 state->scissors = SCISSORS_TRUE; 457else if(!strcmp(sb.buf,"f")) 458 state->scissors = SCISSORS_FALSE; 459else 460 state->scissors = SCISSORS_UNSET; 461 462read_state_file(&sb, state,"apply-opt",1); 463argv_array_clear(&state->git_apply_opts); 464if(sq_dequote_to_argv_array(sb.buf, &state->git_apply_opts) <0) 465die(_("could not parse%s"),am_path(state,"apply-opt")); 466 467 state->rebasing = !!file_exists(am_path(state,"rebasing")); 468 469strbuf_release(&sb); 470} 471 472/** 473 * Removes the am_state directory, forcefully terminating the current am 474 * session. 475 */ 476static voidam_destroy(const struct am_state *state) 477{ 478struct strbuf sb = STRBUF_INIT; 479 480strbuf_addstr(&sb, state->dir); 481remove_dir_recursively(&sb,0); 482strbuf_release(&sb); 483} 484 485/** 486 * Runs applypatch-msg hook. Returns its exit code. 487 */ 488static intrun_applypatch_msg_hook(struct am_state *state) 489{ 490int ret; 491 492assert(state->msg); 493 ret =run_hook_le(NULL,"applypatch-msg",am_path(state,"final-commit"), NULL); 494 495if(!ret) { 496FREE_AND_NULL(state->msg); 497if(read_commit_msg(state) <0) 498die(_("'%s' was deleted by the applypatch-msg hook"), 499am_path(state,"final-commit")); 500} 501 502return ret; 503} 504 505/** 506 * Runs post-rewrite hook. Returns it exit code. 507 */ 508static intrun_post_rewrite_hook(const struct am_state *state) 509{ 510struct child_process cp = CHILD_PROCESS_INIT; 511const char*hook =find_hook("post-rewrite"); 512int ret; 513 514if(!hook) 515return0; 516 517argv_array_push(&cp.args, hook); 518argv_array_push(&cp.args,"rebase"); 519 520 cp.in =xopen(am_path(state,"rewritten"), O_RDONLY); 521 cp.stdout_to_stderr =1; 522 523 ret =run_command(&cp); 524 525close(cp.in); 526return ret; 527} 528 529/** 530 * Reads the state directory's "rewritten" file, and copies notes from the old 531 * commits listed in the file to their rewritten commits. 532 * 533 * Returns 0 on success, -1 on failure. 534 */ 535static intcopy_notes_for_rebase(const struct am_state *state) 536{ 537struct notes_rewrite_cfg *c; 538struct strbuf sb = STRBUF_INIT; 539const char*invalid_line =_("Malformed input line: '%s'."); 540const char*msg ="Notes added by 'git rebase'"; 541FILE*fp; 542int ret =0; 543 544assert(state->rebasing); 545 546 c =init_copy_notes_for_rewrite("rebase"); 547if(!c) 548return0; 549 550 fp =xfopen(am_path(state,"rewritten"),"r"); 551 552while(!strbuf_getline_lf(&sb, fp)) { 553struct object_id from_obj, to_obj; 554 555if(sb.len != GIT_SHA1_HEXSZ *2+1) { 556 ret =error(invalid_line, sb.buf); 557goto finish; 558} 559 560if(get_oid_hex(sb.buf, &from_obj)) { 561 ret =error(invalid_line, sb.buf); 562goto finish; 563} 564 565if(sb.buf[GIT_SHA1_HEXSZ] !=' ') { 566 ret =error(invalid_line, sb.buf); 567goto finish; 568} 569 570if(get_oid_hex(sb.buf + GIT_SHA1_HEXSZ +1, &to_obj)) { 571 ret =error(invalid_line, sb.buf); 572goto finish; 573} 574 575if(copy_note_for_rewrite(c, &from_obj, &to_obj)) 576 ret =error(_("Failed to copy notes from '%s' to '%s'"), 577oid_to_hex(&from_obj),oid_to_hex(&to_obj)); 578} 579 580finish: 581finish_copy_notes_for_rewrite(c, msg); 582fclose(fp); 583strbuf_release(&sb); 584return ret; 585} 586 587/** 588 * Determines if the file looks like a piece of RFC2822 mail by grabbing all 589 * non-indented lines and checking if they look like they begin with valid 590 * header field names. 591 * 592 * Returns 1 if the file looks like a piece of mail, 0 otherwise. 593 */ 594static intis_mail(FILE*fp) 595{ 596const char*header_regex ="^[!-9;-~]+:"; 597struct strbuf sb = STRBUF_INIT; 598 regex_t regex; 599int ret =1; 600 601if(fseek(fp,0L, SEEK_SET)) 602die_errno(_("fseek failed")); 603 604if(regcomp(®ex, header_regex, REG_NOSUB | REG_EXTENDED)) 605die("invalid pattern:%s", header_regex); 606 607while(!strbuf_getline(&sb, fp)) { 608if(!sb.len) 609break;/* End of header */ 610 611/* Ignore indented folded lines */ 612if(*sb.buf =='\t'|| *sb.buf ==' ') 613continue; 614 615/* It's a header if it matches header_regex */ 616if(regexec(®ex, sb.buf,0, NULL,0)) { 617 ret =0; 618goto done; 619} 620} 621 622done: 623regfree(®ex); 624strbuf_release(&sb); 625return ret; 626} 627 628/** 629 * Attempts to detect the patch_format of the patches contained in `paths`, 630 * returning the PATCH_FORMAT_* enum value. Returns PATCH_FORMAT_UNKNOWN if 631 * detection fails. 632 */ 633static intdetect_patch_format(const char**paths) 634{ 635enum patch_format ret = PATCH_FORMAT_UNKNOWN; 636struct strbuf l1 = STRBUF_INIT; 637struct strbuf l2 = STRBUF_INIT; 638struct strbuf l3 = STRBUF_INIT; 639FILE*fp; 640 641/* 642 * We default to mbox format if input is from stdin and for directories 643 */ 644if(!*paths || !strcmp(*paths,"-") ||is_directory(*paths)) 645return PATCH_FORMAT_MBOX; 646 647/* 648 * Otherwise, check the first few lines of the first patch, starting 649 * from the first non-blank line, to try to detect its format. 650 */ 651 652 fp =xfopen(*paths,"r"); 653 654while(!strbuf_getline(&l1, fp)) { 655if(l1.len) 656break; 657} 658 659if(starts_with(l1.buf,"From ") ||starts_with(l1.buf,"From: ")) { 660 ret = PATCH_FORMAT_MBOX; 661goto done; 662} 663 664if(starts_with(l1.buf,"# This series applies on GIT commit")) { 665 ret = PATCH_FORMAT_STGIT_SERIES; 666goto done; 667} 668 669if(!strcmp(l1.buf,"# HG changeset patch")) { 670 ret = PATCH_FORMAT_HG; 671goto done; 672} 673 674strbuf_getline(&l2, fp); 675strbuf_getline(&l3, fp); 676 677/* 678 * If the second line is empty and the third is a From, Author or Date 679 * entry, this is likely an StGit patch. 680 */ 681if(l1.len && !l2.len && 682(starts_with(l3.buf,"From:") || 683starts_with(l3.buf,"Author:") || 684starts_with(l3.buf,"Date:"))) { 685 ret = PATCH_FORMAT_STGIT; 686goto done; 687} 688 689if(l1.len &&is_mail(fp)) { 690 ret = PATCH_FORMAT_MBOX; 691goto done; 692} 693 694done: 695fclose(fp); 696strbuf_release(&l1); 697strbuf_release(&l2); 698strbuf_release(&l3); 699return ret; 700} 701 702/** 703 * Splits out individual email patches from `paths`, where each path is either 704 * a mbox file or a Maildir. Returns 0 on success, -1 on failure. 705 */ 706static intsplit_mail_mbox(struct am_state *state,const char**paths, 707int keep_cr,int mboxrd) 708{ 709struct child_process cp = CHILD_PROCESS_INIT; 710struct strbuf last = STRBUF_INIT; 711 712 cp.git_cmd =1; 713argv_array_push(&cp.args,"mailsplit"); 714argv_array_pushf(&cp.args,"-d%d", state->prec); 715argv_array_pushf(&cp.args,"-o%s", state->dir); 716argv_array_push(&cp.args,"-b"); 717if(keep_cr) 718argv_array_push(&cp.args,"--keep-cr"); 719if(mboxrd) 720argv_array_push(&cp.args,"--mboxrd"); 721argv_array_push(&cp.args,"--"); 722argv_array_pushv(&cp.args, paths); 723 724if(capture_command(&cp, &last,8)) 725return-1; 726 727 state->cur =1; 728 state->last =strtol(last.buf, NULL,10); 729 730return0; 731} 732 733/** 734 * Callback signature for split_mail_conv(). The foreign patch should be 735 * read from `in`, and the converted patch (in RFC2822 mail format) should be 736 * written to `out`. Return 0 on success, or -1 on failure. 737 */ 738typedefint(*mail_conv_fn)(FILE*out,FILE*in,int keep_cr); 739 740/** 741 * Calls `fn` for each file in `paths` to convert the foreign patch to the 742 * RFC2822 mail format suitable for parsing with git-mailinfo. 743 * 744 * Returns 0 on success, -1 on failure. 745 */ 746static intsplit_mail_conv(mail_conv_fn fn,struct am_state *state, 747const char**paths,int keep_cr) 748{ 749static const char*stdin_only[] = {"-", NULL}; 750int i; 751 752if(!*paths) 753 paths = stdin_only; 754 755for(i =0; *paths; paths++, i++) { 756FILE*in, *out; 757const char*mail; 758int ret; 759 760if(!strcmp(*paths,"-")) 761 in = stdin; 762else 763 in =fopen(*paths,"r"); 764 765if(!in) 766returnerror_errno(_("could not open '%s' for reading"), 767*paths); 768 769 mail =mkpath("%s/%0*d", state->dir, state->prec, i +1); 770 771 out =fopen(mail,"w"); 772if(!out) { 773if(in != stdin) 774fclose(in); 775returnerror_errno(_("could not open '%s' for writing"), 776 mail); 777} 778 779 ret =fn(out, in, keep_cr); 780 781fclose(out); 782if(in != stdin) 783fclose(in); 784 785if(ret) 786returnerror(_("could not parse patch '%s'"), *paths); 787} 788 789 state->cur =1; 790 state->last = i; 791return0; 792} 793 794/** 795 * A split_mail_conv() callback that converts an StGit patch to an RFC2822 796 * message suitable for parsing with git-mailinfo. 797 */ 798static intstgit_patch_to_mail(FILE*out,FILE*in,int keep_cr) 799{ 800struct strbuf sb = STRBUF_INIT; 801int subject_printed =0; 802 803while(!strbuf_getline_lf(&sb, in)) { 804const char*str; 805 806if(str_isspace(sb.buf)) 807continue; 808else if(skip_prefix(sb.buf,"Author:", &str)) 809fprintf(out,"From:%s\n", str); 810else if(starts_with(sb.buf,"From") ||starts_with(sb.buf,"Date")) 811fprintf(out,"%s\n", sb.buf); 812else if(!subject_printed) { 813fprintf(out,"Subject:%s\n", sb.buf); 814 subject_printed =1; 815}else{ 816fprintf(out,"\n%s\n", sb.buf); 817break; 818} 819} 820 821strbuf_reset(&sb); 822while(strbuf_fread(&sb,8192, in) >0) { 823fwrite(sb.buf,1, sb.len, out); 824strbuf_reset(&sb); 825} 826 827strbuf_release(&sb); 828return0; 829} 830 831/** 832 * This function only supports a single StGit series file in `paths`. 833 * 834 * Given an StGit series file, converts the StGit patches in the series into 835 * RFC2822 messages suitable for parsing with git-mailinfo, and queues them in 836 * the state directory. 837 * 838 * Returns 0 on success, -1 on failure. 839 */ 840static intsplit_mail_stgit_series(struct am_state *state,const char**paths, 841int keep_cr) 842{ 843const char*series_dir; 844char*series_dir_buf; 845FILE*fp; 846struct argv_array patches = ARGV_ARRAY_INIT; 847struct strbuf sb = STRBUF_INIT; 848int ret; 849 850if(!paths[0] || paths[1]) 851returnerror(_("Only one StGIT patch series can be applied at once")); 852 853 series_dir_buf =xstrdup(*paths); 854 series_dir =dirname(series_dir_buf); 855 856 fp =fopen(*paths,"r"); 857if(!fp) 858returnerror_errno(_("could not open '%s' for reading"), *paths); 859 860while(!strbuf_getline_lf(&sb, fp)) { 861if(*sb.buf =='#') 862continue;/* skip comment lines */ 863 864argv_array_push(&patches,mkpath("%s/%s", series_dir, sb.buf)); 865} 866 867fclose(fp); 868strbuf_release(&sb); 869free(series_dir_buf); 870 871 ret =split_mail_conv(stgit_patch_to_mail, state, patches.argv, keep_cr); 872 873argv_array_clear(&patches); 874return ret; 875} 876 877/** 878 * A split_patches_conv() callback that converts a mercurial patch to a RFC2822 879 * message suitable for parsing with git-mailinfo. 880 */ 881static inthg_patch_to_mail(FILE*out,FILE*in,int keep_cr) 882{ 883struct strbuf sb = STRBUF_INIT; 884int rc =0; 885 886while(!strbuf_getline_lf(&sb, in)) { 887const char*str; 888 889if(skip_prefix(sb.buf,"# User ", &str)) 890fprintf(out,"From:%s\n", str); 891else if(skip_prefix(sb.buf,"# Date ", &str)) { 892 timestamp_t timestamp; 893long tz, tz2; 894char*end; 895 896 errno =0; 897 timestamp =parse_timestamp(str, &end,10); 898if(errno) { 899 rc =error(_("invalid timestamp")); 900goto exit; 901} 902 903if(!skip_prefix(end," ", &str)) { 904 rc =error(_("invalid Date line")); 905goto exit; 906} 907 908 errno =0; 909 tz =strtol(str, &end,10); 910if(errno) { 911 rc =error(_("invalid timezone offset")); 912goto exit; 913} 914 915if(*end) { 916 rc =error(_("invalid Date line")); 917goto exit; 918} 919 920/* 921 * mercurial's timezone is in seconds west of UTC, 922 * however git's timezone is in hours + minutes east of 923 * UTC. Convert it. 924 */ 925 tz2 =labs(tz) /3600*100+labs(tz) %3600/60; 926if(tz >0) 927 tz2 = -tz2; 928 929fprintf(out,"Date:%s\n",show_date(timestamp, tz2,DATE_MODE(RFC2822))); 930}else if(starts_with(sb.buf,"# ")) { 931continue; 932}else{ 933fprintf(out,"\n%s\n", sb.buf); 934break; 935} 936} 937 938strbuf_reset(&sb); 939while(strbuf_fread(&sb,8192, in) >0) { 940fwrite(sb.buf,1, sb.len, out); 941strbuf_reset(&sb); 942} 943exit: 944strbuf_release(&sb); 945return rc; 946} 947 948/** 949 * Splits a list of files/directories into individual email patches. Each path 950 * in `paths` must be a file/directory that is formatted according to 951 * `patch_format`. 952 * 953 * Once split out, the individual email patches will be stored in the state 954 * directory, with each patch's filename being its index, padded to state->prec 955 * digits. 956 * 957 * state->cur will be set to the index of the first mail, and state->last will 958 * be set to the index of the last mail. 959 * 960 * Set keep_cr to 0 to convert all lines ending with \r\n to end with \n, 1 961 * to disable this behavior, -1 to use the default configured setting. 962 * 963 * Returns 0 on success, -1 on failure. 964 */ 965static intsplit_mail(struct am_state *state,enum patch_format patch_format, 966const char**paths,int keep_cr) 967{ 968if(keep_cr <0) { 969 keep_cr =0; 970git_config_get_bool("am.keepcr", &keep_cr); 971} 972 973switch(patch_format) { 974case PATCH_FORMAT_MBOX: 975returnsplit_mail_mbox(state, paths, keep_cr,0); 976case PATCH_FORMAT_STGIT: 977returnsplit_mail_conv(stgit_patch_to_mail, state, paths, keep_cr); 978case PATCH_FORMAT_STGIT_SERIES: 979returnsplit_mail_stgit_series(state, paths, keep_cr); 980case PATCH_FORMAT_HG: 981returnsplit_mail_conv(hg_patch_to_mail, state, paths, keep_cr); 982case PATCH_FORMAT_MBOXRD: 983returnsplit_mail_mbox(state, paths, keep_cr,1); 984default: 985die("BUG: invalid patch_format"); 986} 987return-1; 988} 989 990/** 991 * Setup a new am session for applying patches 992 */ 993static voidam_setup(struct am_state *state,enum patch_format patch_format, 994const char**paths,int keep_cr) 995{ 996struct object_id curr_head; 997const char*str; 998struct strbuf sb = STRBUF_INIT; 9991000if(!patch_format)1001 patch_format =detect_patch_format(paths);10021003if(!patch_format) {1004fprintf_ln(stderr,_("Patch format detection failed."));1005exit(128);1006}10071008if(mkdir(state->dir,0777) <0&& errno != EEXIST)1009die_errno(_("failed to create directory '%s'"), state->dir);10101011if(split_mail(state, patch_format, paths, keep_cr) <0) {1012am_destroy(state);1013die(_("Failed to split patches."));1014}10151016if(state->rebasing)1017 state->threeway =1;10181019write_state_bool(state,"threeway", state->threeway);1020write_state_bool(state,"quiet", state->quiet);1021write_state_bool(state,"sign", state->signoff);1022write_state_bool(state,"utf8", state->utf8);10231024if(state->allow_rerere_autoupdate)1025write_state_bool(state,"rerere-autoupdate",1026 state->allow_rerere_autoupdate == RERERE_AUTOUPDATE);10271028switch(state->keep) {1029case KEEP_FALSE:1030 str ="f";1031break;1032case KEEP_TRUE:1033 str ="t";1034break;1035case KEEP_NON_PATCH:1036 str ="b";1037break;1038default:1039die("BUG: invalid value for state->keep");1040}10411042write_state_text(state,"keep", str);1043write_state_bool(state,"messageid", state->message_id);10441045switch(state->scissors) {1046case SCISSORS_UNSET:1047 str ="";1048break;1049case SCISSORS_FALSE:1050 str ="f";1051break;1052case SCISSORS_TRUE:1053 str ="t";1054break;1055default:1056die("BUG: invalid value for state->scissors");1057}1058write_state_text(state,"scissors", str);10591060sq_quote_argv(&sb, state->git_apply_opts.argv,0);1061write_state_text(state,"apply-opt", sb.buf);10621063if(state->rebasing)1064write_state_text(state,"rebasing","");1065else1066write_state_text(state,"applying","");10671068if(!get_oid("HEAD", &curr_head)) {1069write_state_text(state,"abort-safety",oid_to_hex(&curr_head));1070if(!state->rebasing)1071update_ref_oid("am","ORIG_HEAD", &curr_head, NULL,0,1072 UPDATE_REFS_DIE_ON_ERR);1073}else{1074write_state_text(state,"abort-safety","");1075if(!state->rebasing)1076delete_ref(NULL,"ORIG_HEAD", NULL,0);1077}10781079/*1080 * NOTE: Since the "next" and "last" files determine if an am_state1081 * session is in progress, they should be written last.1082 */10831084write_state_count(state,"next", state->cur);1085write_state_count(state,"last", state->last);10861087strbuf_release(&sb);1088}10891090/**1091 * Increments the patch pointer, and cleans am_state for the application of the1092 * next patch.1093 */1094static voidam_next(struct am_state *state)1095{1096struct object_id head;10971098FREE_AND_NULL(state->author_name);1099FREE_AND_NULL(state->author_email);1100FREE_AND_NULL(state->author_date);1101FREE_AND_NULL(state->msg);1102 state->msg_len =0;11031104unlink(am_path(state,"author-script"));1105unlink(am_path(state,"final-commit"));11061107oidclr(&state->orig_commit);1108unlink(am_path(state,"original-commit"));11091110if(!get_oid("HEAD", &head))1111write_state_text(state,"abort-safety",oid_to_hex(&head));1112else1113write_state_text(state,"abort-safety","");11141115 state->cur++;1116write_state_count(state,"next", state->cur);1117}11181119/**1120 * Returns the filename of the current patch email.1121 */1122static const char*msgnum(const struct am_state *state)1123{1124static struct strbuf sb = STRBUF_INIT;11251126strbuf_reset(&sb);1127strbuf_addf(&sb,"%0*d", state->prec, state->cur);11281129return sb.buf;1130}11311132/**1133 * Refresh and write index.1134 */1135static voidrefresh_and_write_cache(void)1136{1137struct lock_file *lock_file =xcalloc(1,sizeof(struct lock_file));11381139hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);1140refresh_cache(REFRESH_QUIET);1141if(write_locked_index(&the_index, lock_file, COMMIT_LOCK))1142die(_("unable to write index file"));1143}11441145/**1146 * Dies with a user-friendly message on how to proceed after resolving the1147 * problem. This message can be overridden with state->resolvemsg.1148 */1149static void NORETURN die_user_resolve(const struct am_state *state)1150{1151if(state->resolvemsg) {1152printf_ln("%s", state->resolvemsg);1153}else{1154const char*cmdline = state->interactive ?"git am -i":"git am";11551156printf_ln(_("When you have resolved this problem, run\"%s--continue\"."), cmdline);1157printf_ln(_("If you prefer to skip this patch, run\"%s--skip\"instead."), cmdline);1158printf_ln(_("To restore the original branch and stop patching, run\"%s--abort\"."), cmdline);1159}11601161exit(128);1162}11631164/**1165 * Appends signoff to the "msg" field of the am_state.1166 */1167static voidam_append_signoff(struct am_state *state)1168{1169struct strbuf sb = STRBUF_INIT;11701171strbuf_attach(&sb, state->msg, state->msg_len, state->msg_len);1172append_signoff(&sb,0,0);1173 state->msg =strbuf_detach(&sb, &state->msg_len);1174}11751176/**1177 * Parses `mail` using git-mailinfo, extracting its patch and authorship info.1178 * state->msg will be set to the patch message. state->author_name,1179 * state->author_email and state->author_date will be set to the patch author's1180 * name, email and date respectively. The patch body will be written to the1181 * state directory's "patch" file.1182 *1183 * Returns 1 if the patch should be skipped, 0 otherwise.1184 */1185static intparse_mail(struct am_state *state,const char*mail)1186{1187FILE*fp;1188struct strbuf sb = STRBUF_INIT;1189struct strbuf msg = STRBUF_INIT;1190struct strbuf author_name = STRBUF_INIT;1191struct strbuf author_date = STRBUF_INIT;1192struct strbuf author_email = STRBUF_INIT;1193int ret =0;1194struct mailinfo mi;11951196setup_mailinfo(&mi);11971198if(state->utf8)1199 mi.metainfo_charset =get_commit_output_encoding();1200else1201 mi.metainfo_charset = NULL;12021203switch(state->keep) {1204case KEEP_FALSE:1205break;1206case KEEP_TRUE:1207 mi.keep_subject =1;1208break;1209case KEEP_NON_PATCH:1210 mi.keep_non_patch_brackets_in_subject =1;1211break;1212default:1213die("BUG: invalid value for state->keep");1214}12151216if(state->message_id)1217 mi.add_message_id =1;12181219switch(state->scissors) {1220case SCISSORS_UNSET:1221break;1222case SCISSORS_FALSE:1223 mi.use_scissors =0;1224break;1225case SCISSORS_TRUE:1226 mi.use_scissors =1;1227break;1228default:1229die("BUG: invalid value for state->scissors");1230}12311232 mi.input =xfopen(mail,"r");1233 mi.output =xfopen(am_path(state,"info"),"w");1234if(mailinfo(&mi,am_path(state,"msg"),am_path(state,"patch")))1235die("could not parse patch");12361237fclose(mi.input);1238fclose(mi.output);12391240/* Extract message and author information */1241 fp =xfopen(am_path(state,"info"),"r");1242while(!strbuf_getline_lf(&sb, fp)) {1243const char*x;12441245if(skip_prefix(sb.buf,"Subject: ", &x)) {1246if(msg.len)1247strbuf_addch(&msg,'\n');1248strbuf_addstr(&msg, x);1249}else if(skip_prefix(sb.buf,"Author: ", &x))1250strbuf_addstr(&author_name, x);1251else if(skip_prefix(sb.buf,"Email: ", &x))1252strbuf_addstr(&author_email, x);1253else if(skip_prefix(sb.buf,"Date: ", &x))1254strbuf_addstr(&author_date, x);1255}1256fclose(fp);12571258/* Skip pine's internal folder data */1259if(!strcmp(author_name.buf,"Mail System Internal Data")) {1260 ret =1;1261goto finish;1262}12631264if(is_empty_file(am_path(state,"patch"))) {1265printf_ln(_("Patch is empty."));1266die_user_resolve(state);1267}12681269strbuf_addstr(&msg,"\n\n");1270strbuf_addbuf(&msg, &mi.log_message);1271strbuf_stripspace(&msg,0);12721273assert(!state->author_name);1274 state->author_name =strbuf_detach(&author_name, NULL);12751276assert(!state->author_email);1277 state->author_email =strbuf_detach(&author_email, NULL);12781279assert(!state->author_date);1280 state->author_date =strbuf_detach(&author_date, NULL);12811282assert(!state->msg);1283 state->msg =strbuf_detach(&msg, &state->msg_len);12841285finish:1286strbuf_release(&msg);1287strbuf_release(&author_date);1288strbuf_release(&author_email);1289strbuf_release(&author_name);1290strbuf_release(&sb);1291clear_mailinfo(&mi);1292return ret;1293}12941295/**1296 * Sets commit_id to the commit hash where the mail was generated from.1297 * Returns 0 on success, -1 on failure.1298 */1299static intget_mail_commit_oid(struct object_id *commit_id,const char*mail)1300{1301struct strbuf sb = STRBUF_INIT;1302FILE*fp =xfopen(mail,"r");1303const char*x;1304int ret =0;13051306if(strbuf_getline_lf(&sb, fp) ||1307!skip_prefix(sb.buf,"From ", &x) ||1308get_oid_hex(x, commit_id) <0)1309 ret = -1;13101311strbuf_release(&sb);1312fclose(fp);1313return ret;1314}13151316/**1317 * Sets state->msg, state->author_name, state->author_email, state->author_date1318 * to the commit's respective info.1319 */1320static voidget_commit_info(struct am_state *state,struct commit *commit)1321{1322const char*buffer, *ident_line, *msg;1323size_t ident_len;1324struct ident_split id;13251326 buffer =logmsg_reencode(commit, NULL,get_commit_output_encoding());13271328 ident_line =find_commit_header(buffer,"author", &ident_len);13291330if(split_ident_line(&id, ident_line, ident_len) <0)1331die(_("invalid ident line: %.*s"), (int)ident_len, ident_line);13321333assert(!state->author_name);1334if(id.name_begin)1335 state->author_name =1336xmemdupz(id.name_begin, id.name_end - id.name_begin);1337else1338 state->author_name =xstrdup("");13391340assert(!state->author_email);1341if(id.mail_begin)1342 state->author_email =1343xmemdupz(id.mail_begin, id.mail_end - id.mail_begin);1344else1345 state->author_email =xstrdup("");13461347assert(!state->author_date);1348 state->author_date =xstrdup(show_ident_date(&id,DATE_MODE(NORMAL)));13491350assert(!state->msg);1351 msg =strstr(buffer,"\n\n");1352if(!msg)1353die(_("unable to parse commit%s"),oid_to_hex(&commit->object.oid));1354 state->msg =xstrdup(msg +2);1355 state->msg_len =strlen(state->msg);1356unuse_commit_buffer(commit, buffer);1357}13581359/**1360 * Writes `commit` as a patch to the state directory's "patch" file.1361 */1362static voidwrite_commit_patch(const struct am_state *state,struct commit *commit)1363{1364struct rev_info rev_info;1365FILE*fp;13661367 fp =xfopen(am_path(state,"patch"),"w");1368init_revisions(&rev_info, NULL);1369 rev_info.diff =1;1370 rev_info.abbrev =0;1371 rev_info.disable_stdin =1;1372 rev_info.show_root_diff =1;1373 rev_info.diffopt.output_format = DIFF_FORMAT_PATCH;1374 rev_info.no_commit_id =1;1375DIFF_OPT_SET(&rev_info.diffopt, BINARY);1376DIFF_OPT_SET(&rev_info.diffopt, FULL_INDEX);1377 rev_info.diffopt.use_color =0;1378 rev_info.diffopt.file = fp;1379 rev_info.diffopt.close_file =1;1380add_pending_object(&rev_info, &commit->object,"");1381diff_setup_done(&rev_info.diffopt);1382log_tree_commit(&rev_info, commit);1383}13841385/**1386 * Writes the diff of the index against HEAD as a patch to the state1387 * directory's "patch" file.1388 */1389static voidwrite_index_patch(const struct am_state *state)1390{1391struct tree *tree;1392struct object_id head;1393struct rev_info rev_info;1394FILE*fp;13951396if(!get_oid_tree("HEAD", &head))1397 tree =lookup_tree(&head);1398else1399 tree =lookup_tree(&empty_tree_oid);14001401 fp =xfopen(am_path(state,"patch"),"w");1402init_revisions(&rev_info, NULL);1403 rev_info.diff =1;1404 rev_info.disable_stdin =1;1405 rev_info.no_commit_id =1;1406 rev_info.diffopt.output_format = DIFF_FORMAT_PATCH;1407 rev_info.diffopt.use_color =0;1408 rev_info.diffopt.file = fp;1409 rev_info.diffopt.close_file =1;1410add_pending_object(&rev_info, &tree->object,"");1411diff_setup_done(&rev_info.diffopt);1412run_diff_index(&rev_info,1);1413}14141415/**1416 * Like parse_mail(), but parses the mail by looking up its commit ID1417 * directly. This is used in --rebasing mode to bypass git-mailinfo's munging1418 * of patches.1419 *1420 * state->orig_commit will be set to the original commit ID.1421 *1422 * Will always return 0 as the patch should never be skipped.1423 */1424static intparse_mail_rebase(struct am_state *state,const char*mail)1425{1426struct commit *commit;1427struct object_id commit_oid;14281429if(get_mail_commit_oid(&commit_oid, mail) <0)1430die(_("could not parse%s"), mail);14311432 commit =lookup_commit_or_die(&commit_oid, mail);14331434get_commit_info(state, commit);14351436write_commit_patch(state, commit);14371438oidcpy(&state->orig_commit, &commit_oid);1439write_state_text(state,"original-commit",oid_to_hex(&commit_oid));14401441return0;1442}14431444/**1445 * Applies current patch with git-apply. Returns 0 on success, -1 otherwise. If1446 * `index_file` is not NULL, the patch will be applied to that index.1447 */1448static intrun_apply(const struct am_state *state,const char*index_file)1449{1450struct argv_array apply_paths = ARGV_ARRAY_INIT;1451struct argv_array apply_opts = ARGV_ARRAY_INIT;1452struct apply_state apply_state;1453int res, opts_left;1454static struct lock_file lock_file;1455int force_apply =0;1456int options =0;14571458if(init_apply_state(&apply_state, NULL, &lock_file))1459die("BUG: init_apply_state() failed");14601461argv_array_push(&apply_opts,"apply");1462argv_array_pushv(&apply_opts, state->git_apply_opts.argv);14631464 opts_left =apply_parse_options(apply_opts.argc, apply_opts.argv,1465&apply_state, &force_apply, &options,1466 NULL);14671468if(opts_left !=0)1469die("unknown option passed through to git apply");14701471if(index_file) {1472 apply_state.index_file = index_file;1473 apply_state.cached =1;1474}else1475 apply_state.check_index =1;14761477/*1478 * If we are allowed to fall back on 3-way merge, don't give false1479 * errors during the initial attempt.1480 */1481if(state->threeway && !index_file)1482 apply_state.apply_verbosity = verbosity_silent;14831484if(check_apply_state(&apply_state, force_apply))1485die("BUG: check_apply_state() failed");14861487argv_array_push(&apply_paths,am_path(state,"patch"));14881489 res =apply_all_patches(&apply_state, apply_paths.argc, apply_paths.argv, options);14901491argv_array_clear(&apply_paths);1492argv_array_clear(&apply_opts);1493clear_apply_state(&apply_state);14941495if(res)1496return res;14971498if(index_file) {1499/* Reload index as apply_all_patches() will have modified it. */1500discard_cache();1501read_cache_from(index_file);1502}15031504return0;1505}15061507/**1508 * Builds an index that contains just the blobs needed for a 3way merge.1509 */1510static intbuild_fake_ancestor(const struct am_state *state,const char*index_file)1511{1512struct child_process cp = CHILD_PROCESS_INIT;15131514 cp.git_cmd =1;1515argv_array_push(&cp.args,"apply");1516argv_array_pushv(&cp.args, state->git_apply_opts.argv);1517argv_array_pushf(&cp.args,"--build-fake-ancestor=%s", index_file);1518argv_array_push(&cp.args,am_path(state,"patch"));15191520if(run_command(&cp))1521return-1;15221523return0;1524}15251526/**1527 * Attempt a threeway merge, using index_path as the temporary index.1528 */1529static intfall_back_threeway(const struct am_state *state,const char*index_path)1530{1531struct object_id orig_tree, their_tree, our_tree;1532const struct object_id *bases[1] = { &orig_tree };1533struct merge_options o;1534struct commit *result;1535char*their_tree_name;15361537if(get_oid("HEAD", &our_tree) <0)1538hashcpy(our_tree.hash, EMPTY_TREE_SHA1_BIN);15391540if(build_fake_ancestor(state, index_path))1541returnerror("could not build fake ancestor");15421543discard_cache();1544read_cache_from(index_path);15451546if(write_index_as_tree(orig_tree.hash, &the_index, index_path,0, NULL))1547returnerror(_("Repository lacks necessary blobs to fall back on 3-way merge."));15481549say(state, stdout,_("Using index info to reconstruct a base tree..."));15501551if(!state->quiet) {1552/*1553 * List paths that needed 3-way fallback, so that the user can1554 * review them with extra care to spot mismerges.1555 */1556struct rev_info rev_info;1557const char*diff_filter_str ="--diff-filter=AM";15581559init_revisions(&rev_info, NULL);1560 rev_info.diffopt.output_format = DIFF_FORMAT_NAME_STATUS;1561diff_opt_parse(&rev_info.diffopt, &diff_filter_str,1, rev_info.prefix);1562add_pending_oid(&rev_info,"HEAD", &our_tree,0);1563diff_setup_done(&rev_info.diffopt);1564run_diff_index(&rev_info,1);1565}15661567if(run_apply(state, index_path))1568returnerror(_("Did you hand edit your patch?\n"1569"It does not apply to blobs recorded in its index."));15701571if(write_index_as_tree(their_tree.hash, &the_index, index_path,0, NULL))1572returnerror("could not write tree");15731574say(state, stdout,_("Falling back to patching base and 3-way merge..."));15751576discard_cache();1577read_cache();15781579/*1580 * This is not so wrong. Depending on which base we picked, orig_tree1581 * may be wildly different from ours, but their_tree has the same set of1582 * wildly different changes in parts the patch did not touch, so1583 * recursive ends up canceling them, saying that we reverted all those1584 * changes.1585 */15861587init_merge_options(&o);15881589 o.branch1 ="HEAD";1590 their_tree_name =xstrfmt("%.*s",linelen(state->msg), state->msg);1591 o.branch2 = their_tree_name;15921593if(state->quiet)1594 o.verbosity =0;15951596if(merge_recursive_generic(&o, &our_tree, &their_tree,1, bases, &result)) {1597rerere(state->allow_rerere_autoupdate);1598free(their_tree_name);1599returnerror(_("Failed to merge in the changes."));1600}16011602free(their_tree_name);1603return0;1604}16051606/**1607 * Commits the current index with state->msg as the commit message and1608 * state->author_name, state->author_email and state->author_date as the author1609 * information.1610 */1611static voiddo_commit(const struct am_state *state)1612{1613struct object_id tree, parent, commit;1614const struct object_id *old_oid;1615struct commit_list *parents = NULL;1616const char*reflog_msg, *author;1617struct strbuf sb = STRBUF_INIT;16181619if(run_hook_le(NULL,"pre-applypatch", NULL))1620exit(1);16211622if(write_cache_as_tree(tree.hash,0, NULL))1623die(_("git write-tree failed to write a tree"));16241625if(!get_oid_commit("HEAD", &parent)) {1626 old_oid = &parent;1627commit_list_insert(lookup_commit(&parent), &parents);1628}else{1629 old_oid = NULL;1630say(state, stderr,_("applying to an empty history"));1631}16321633 author =fmt_ident(state->author_name, state->author_email,1634 state->ignore_date ? NULL : state->author_date,1635 IDENT_STRICT);16361637if(state->committer_date_is_author_date)1638setenv("GIT_COMMITTER_DATE",1639 state->ignore_date ?"": state->author_date,1);16401641if(commit_tree(state->msg, state->msg_len, tree.hash, parents, commit.hash,1642 author, state->sign_commit))1643die(_("failed to write commit object"));16441645 reflog_msg =getenv("GIT_REFLOG_ACTION");1646if(!reflog_msg)1647 reflog_msg ="am";16481649strbuf_addf(&sb,"%s: %.*s", reflog_msg,linelen(state->msg),1650 state->msg);16511652update_ref_oid(sb.buf,"HEAD", &commit, old_oid,0,1653 UPDATE_REFS_DIE_ON_ERR);16541655if(state->rebasing) {1656FILE*fp =xfopen(am_path(state,"rewritten"),"a");16571658assert(!is_null_oid(&state->orig_commit));1659fprintf(fp,"%s",oid_to_hex(&state->orig_commit));1660fprintf(fp,"%s\n",oid_to_hex(&commit));1661fclose(fp);1662}16631664run_hook_le(NULL,"post-applypatch", NULL);16651666strbuf_release(&sb);1667}16681669/**1670 * Validates the am_state for resuming -- the "msg" and authorship fields must1671 * be filled up.1672 */1673static voidvalidate_resume_state(const struct am_state *state)1674{1675if(!state->msg)1676die(_("cannot resume:%sdoes not exist."),1677am_path(state,"final-commit"));16781679if(!state->author_name || !state->author_email || !state->author_date)1680die(_("cannot resume:%sdoes not exist."),1681am_path(state,"author-script"));1682}16831684/**1685 * Interactively prompt the user on whether the current patch should be1686 * applied.1687 *1688 * Returns 0 if the user chooses to apply the patch, 1 if the user chooses to1689 * skip it.1690 */1691static intdo_interactive(struct am_state *state)1692{1693assert(state->msg);16941695if(!isatty(0))1696die(_("cannot be interactive without stdin connected to a terminal."));16971698for(;;) {1699const char*reply;17001701puts(_("Commit Body is:"));1702puts("--------------------------");1703printf("%s", state->msg);1704puts("--------------------------");17051706/*1707 * TRANSLATORS: Make sure to include [y], [n], [e], [v] and [a]1708 * in your translation. The program will only accept English1709 * input at this point.1710 */1711 reply =git_prompt(_("Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all: "), PROMPT_ECHO);17121713if(!reply) {1714continue;1715}else if(*reply =='y'|| *reply =='Y') {1716return0;1717}else if(*reply =='a'|| *reply =='A') {1718 state->interactive =0;1719return0;1720}else if(*reply =='n'|| *reply =='N') {1721return1;1722}else if(*reply =='e'|| *reply =='E') {1723struct strbuf msg = STRBUF_INIT;17241725if(!launch_editor(am_path(state,"final-commit"), &msg, NULL)) {1726free(state->msg);1727 state->msg =strbuf_detach(&msg, &state->msg_len);1728}1729strbuf_release(&msg);1730}else if(*reply =='v'|| *reply =='V') {1731const char*pager =git_pager(1);1732struct child_process cp = CHILD_PROCESS_INIT;17331734if(!pager)1735 pager ="cat";1736prepare_pager_args(&cp, pager);1737argv_array_push(&cp.args,am_path(state,"patch"));1738run_command(&cp);1739}1740}1741}17421743/**1744 * Applies all queued mail.1745 *1746 * If `resume` is true, we are "resuming". The "msg" and authorship fields, as1747 * well as the state directory's "patch" file is used as-is for applying the1748 * patch and committing it.1749 */1750static voidam_run(struct am_state *state,int resume)1751{1752const char*argv_gc_auto[] = {"gc","--auto", NULL};1753struct strbuf sb = STRBUF_INIT;17541755unlink(am_path(state,"dirtyindex"));17561757refresh_and_write_cache();17581759if(index_has_changes(&sb)) {1760write_state_bool(state,"dirtyindex",1);1761die(_("Dirty index: cannot apply patches (dirty:%s)"), sb.buf);1762}17631764strbuf_release(&sb);17651766while(state->cur <= state->last) {1767const char*mail =am_path(state,msgnum(state));1768int apply_status;17691770reset_ident_date();17711772if(!file_exists(mail))1773goto next;17741775if(resume) {1776validate_resume_state(state);1777}else{1778int skip;17791780if(state->rebasing)1781 skip =parse_mail_rebase(state, mail);1782else1783 skip =parse_mail(state, mail);17841785if(skip)1786goto next;/* mail should be skipped */17871788if(state->signoff)1789am_append_signoff(state);17901791write_author_script(state);1792write_commit_msg(state);1793}17941795if(state->interactive &&do_interactive(state))1796goto next;17971798if(run_applypatch_msg_hook(state))1799exit(1);18001801say(state, stdout,_("Applying: %.*s"),linelen(state->msg), state->msg);18021803 apply_status =run_apply(state, NULL);18041805if(apply_status && state->threeway) {1806struct strbuf sb = STRBUF_INIT;18071808strbuf_addstr(&sb,am_path(state,"patch-merge-index"));1809 apply_status =fall_back_threeway(state, sb.buf);1810strbuf_release(&sb);18111812/*1813 * Applying the patch to an earlier tree and merging1814 * the result may have produced the same tree as ours.1815 */1816if(!apply_status && !index_has_changes(NULL)) {1817say(state, stdout,_("No changes -- Patch already applied."));1818goto next;1819}1820}18211822if(apply_status) {1823int advice_amworkdir =1;18241825printf_ln(_("Patch failed at%s%.*s"),msgnum(state),1826linelen(state->msg), state->msg);18271828git_config_get_bool("advice.amworkdir", &advice_amworkdir);18291830if(advice_amworkdir)1831printf_ln(_("The copy of the patch that failed is found in:%s"),1832am_path(state,"patch"));18331834die_user_resolve(state);1835}18361837do_commit(state);18381839next:1840am_next(state);18411842if(resume)1843am_load(state);1844 resume =0;1845}18461847if(!is_empty_file(am_path(state,"rewritten"))) {1848assert(state->rebasing);1849copy_notes_for_rebase(state);1850run_post_rewrite_hook(state);1851}18521853/*1854 * In rebasing mode, it's up to the caller to take care of1855 * housekeeping.1856 */1857if(!state->rebasing) {1858am_destroy(state);1859close_all_packs();1860run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);1861}1862}18631864/**1865 * Resume the current am session after patch application failure. The user did1866 * all the hard work, and we do not have to do any patch application. Just1867 * trust and commit what the user has in the index and working tree.1868 */1869static voidam_resolve(struct am_state *state)1870{1871validate_resume_state(state);18721873say(state, stdout,_("Applying: %.*s"),linelen(state->msg), state->msg);18741875if(!index_has_changes(NULL)) {1876printf_ln(_("No changes - did you forget to use 'git add'?\n"1877"If there is nothing left to stage, chances are that something else\n"1878"already introduced the same changes; you might want to skip this patch."));1879die_user_resolve(state);1880}18811882if(unmerged_cache()) {1883printf_ln(_("You still have unmerged paths in your index.\n"1884"You should 'git add' each file with resolved conflicts to mark them as such.\n"1885"You might run `git rm` on a file to accept\"deleted by them\"for it."));1886die_user_resolve(state);1887}18881889if(state->interactive) {1890write_index_patch(state);1891if(do_interactive(state))1892goto next;1893}18941895rerere(0);18961897do_commit(state);18981899next:1900am_next(state);1901am_load(state);1902am_run(state,0);1903}19041905/**1906 * Performs a checkout fast-forward from `head` to `remote`. If `reset` is1907 * true, any unmerged entries will be discarded. Returns 0 on success, -1 on1908 * failure.1909 */1910static intfast_forward_to(struct tree *head,struct tree *remote,int reset)1911{1912struct lock_file *lock_file;1913struct unpack_trees_options opts;1914struct tree_desc t[2];19151916if(parse_tree(head) ||parse_tree(remote))1917return-1;19181919 lock_file =xcalloc(1,sizeof(struct lock_file));1920hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);19211922refresh_cache(REFRESH_QUIET);19231924memset(&opts,0,sizeof(opts));1925 opts.head_idx =1;1926 opts.src_index = &the_index;1927 opts.dst_index = &the_index;1928 opts.update =1;1929 opts.merge =1;1930 opts.reset = reset;1931 opts.fn = twoway_merge;1932init_tree_desc(&t[0], head->buffer, head->size);1933init_tree_desc(&t[1], remote->buffer, remote->size);19341935if(unpack_trees(2, t, &opts)) {1936rollback_lock_file(lock_file);1937return-1;1938}19391940if(write_locked_index(&the_index, lock_file, COMMIT_LOCK))1941die(_("unable to write new index file"));19421943return0;1944}19451946/**1947 * Merges a tree into the index. The index's stat info will take precedence1948 * over the merged tree's. Returns 0 on success, -1 on failure.1949 */1950static intmerge_tree(struct tree *tree)1951{1952struct lock_file *lock_file;1953struct unpack_trees_options opts;1954struct tree_desc t[1];19551956if(parse_tree(tree))1957return-1;19581959 lock_file =xcalloc(1,sizeof(struct lock_file));1960hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);19611962memset(&opts,0,sizeof(opts));1963 opts.head_idx =1;1964 opts.src_index = &the_index;1965 opts.dst_index = &the_index;1966 opts.merge =1;1967 opts.fn = oneway_merge;1968init_tree_desc(&t[0], tree->buffer, tree->size);19691970if(unpack_trees(1, t, &opts)) {1971rollback_lock_file(lock_file);1972return-1;1973}19741975if(write_locked_index(&the_index, lock_file, COMMIT_LOCK))1976die(_("unable to write new index file"));19771978return0;1979}19801981/**1982 * Clean the index without touching entries that are not modified between1983 * `head` and `remote`.1984 */1985static intclean_index(const struct object_id *head,const struct object_id *remote)1986{1987struct tree *head_tree, *remote_tree, *index_tree;1988struct object_id index;19891990 head_tree =parse_tree_indirect(head);1991if(!head_tree)1992returnerror(_("Could not parse object '%s'."),oid_to_hex(head));19931994 remote_tree =parse_tree_indirect(remote);1995if(!remote_tree)1996returnerror(_("Could not parse object '%s'."),oid_to_hex(remote));19971998read_cache_unmerged();19992000if(fast_forward_to(head_tree, head_tree,1))2001return-1;20022003if(write_cache_as_tree(index.hash,0, NULL))2004return-1;20052006 index_tree =parse_tree_indirect(&index);2007if(!index_tree)2008returnerror(_("Could not parse object '%s'."),oid_to_hex(&index));20092010if(fast_forward_to(index_tree, remote_tree,0))2011return-1;20122013if(merge_tree(remote_tree))2014return-1;20152016remove_branch_state();20172018return0;2019}20202021/**2022 * Resets rerere's merge resolution metadata.2023 */2024static voidam_rerere_clear(void)2025{2026struct string_list merge_rr = STRING_LIST_INIT_DUP;2027rerere_clear(&merge_rr);2028string_list_clear(&merge_rr,1);2029}20302031/**2032 * Resume the current am session by skipping the current patch.2033 */2034static voidam_skip(struct am_state *state)2035{2036struct object_id head;20372038am_rerere_clear();20392040if(get_oid("HEAD", &head))2041hashcpy(head.hash, EMPTY_TREE_SHA1_BIN);20422043if(clean_index(&head, &head))2044die(_("failed to clean index"));20452046am_next(state);2047am_load(state);2048am_run(state,0);2049}20502051/**2052 * Returns true if it is safe to reset HEAD to the ORIG_HEAD, false otherwise.2053 *2054 * It is not safe to reset HEAD when:2055 * 1. git-am previously failed because the index was dirty.2056 * 2. HEAD has moved since git-am previously failed.2057 */2058static intsafe_to_abort(const struct am_state *state)2059{2060struct strbuf sb = STRBUF_INIT;2061struct object_id abort_safety, head;20622063if(file_exists(am_path(state,"dirtyindex")))2064return0;20652066if(read_state_file(&sb, state,"abort-safety",1) >0) {2067if(get_oid_hex(sb.buf, &abort_safety))2068die(_("could not parse%s"),am_path(state,"abort-safety"));2069}else2070oidclr(&abort_safety);2071strbuf_release(&sb);20722073if(get_oid("HEAD", &head))2074oidclr(&head);20752076if(!oidcmp(&head, &abort_safety))2077return1;20782079warning(_("You seem to have moved HEAD since the last 'am' failure.\n"2080"Not rewinding to ORIG_HEAD"));20812082return0;2083}20842085/**2086 * Aborts the current am session if it is safe to do so.2087 */2088static voidam_abort(struct am_state *state)2089{2090struct object_id curr_head, orig_head;2091int has_curr_head, has_orig_head;2092char*curr_branch;20932094if(!safe_to_abort(state)) {2095am_destroy(state);2096return;2097}20982099am_rerere_clear();21002101 curr_branch =resolve_refdup("HEAD",0, curr_head.hash, NULL);2102 has_curr_head = curr_branch && !is_null_oid(&curr_head);2103if(!has_curr_head)2104hashcpy(curr_head.hash, EMPTY_TREE_SHA1_BIN);21052106 has_orig_head = !get_oid("ORIG_HEAD", &orig_head);2107if(!has_orig_head)2108hashcpy(orig_head.hash, EMPTY_TREE_SHA1_BIN);21092110clean_index(&curr_head, &orig_head);21112112if(has_orig_head)2113update_ref_oid("am --abort","HEAD", &orig_head,2114 has_curr_head ? &curr_head : NULL,0,2115 UPDATE_REFS_DIE_ON_ERR);2116else if(curr_branch)2117delete_ref(NULL, curr_branch, NULL, REF_NODEREF);21182119free(curr_branch);2120am_destroy(state);2121}21222123/**2124 * parse_options() callback that validates and sets opt->value to the2125 * PATCH_FORMAT_* enum value corresponding to `arg`.2126 */2127static intparse_opt_patchformat(const struct option *opt,const char*arg,int unset)2128{2129int*opt_value = opt->value;21302131if(!strcmp(arg,"mbox"))2132*opt_value = PATCH_FORMAT_MBOX;2133else if(!strcmp(arg,"stgit"))2134*opt_value = PATCH_FORMAT_STGIT;2135else if(!strcmp(arg,"stgit-series"))2136*opt_value = PATCH_FORMAT_STGIT_SERIES;2137else if(!strcmp(arg,"hg"))2138*opt_value = PATCH_FORMAT_HG;2139else if(!strcmp(arg,"mboxrd"))2140*opt_value = PATCH_FORMAT_MBOXRD;2141else2142returnerror(_("Invalid value for --patch-format:%s"), arg);2143return0;2144}21452146enum resume_mode {2147 RESUME_FALSE =0,2148 RESUME_APPLY,2149 RESUME_RESOLVED,2150 RESUME_SKIP,2151 RESUME_ABORT2152};21532154static intgit_am_config(const char*k,const char*v,void*cb)2155{2156int status;21572158 status =git_gpg_config(k, v, NULL);2159if(status)2160return status;21612162returngit_default_config(k, v, NULL);2163}21642165intcmd_am(int argc,const char**argv,const char*prefix)2166{2167struct am_state state;2168int binary = -1;2169int keep_cr = -1;2170int patch_format = PATCH_FORMAT_UNKNOWN;2171enum resume_mode resume = RESUME_FALSE;2172int in_progress;21732174const char*const usage[] = {2175N_("git am [<options>] [(<mbox> | <Maildir>)...]"),2176N_("git am [<options>] (--continue | --skip | --abort)"),2177 NULL2178};21792180struct option options[] = {2181OPT_BOOL('i',"interactive", &state.interactive,2182N_("run interactively")),2183OPT_HIDDEN_BOOL('b',"binary", &binary,2184N_("historical option -- no-op")),2185OPT_BOOL('3',"3way", &state.threeway,2186N_("allow fall back on 3way merging if needed")),2187OPT__QUIET(&state.quiet,N_("be quiet")),2188OPT_SET_INT('s',"signoff", &state.signoff,2189N_("add a Signed-off-by line to the commit message"),2190 SIGNOFF_EXPLICIT),2191OPT_BOOL('u',"utf8", &state.utf8,2192N_("recode into utf8 (default)")),2193OPT_SET_INT('k',"keep", &state.keep,2194N_("pass -k flag to git-mailinfo"), KEEP_TRUE),2195OPT_SET_INT(0,"keep-non-patch", &state.keep,2196N_("pass -b flag to git-mailinfo"), KEEP_NON_PATCH),2197OPT_BOOL('m',"message-id", &state.message_id,2198N_("pass -m flag to git-mailinfo")),2199{ OPTION_SET_INT,0,"keep-cr", &keep_cr, NULL,2200N_("pass --keep-cr flag to git-mailsplit for mbox format"),2201 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL,1},2202{ OPTION_SET_INT,0,"no-keep-cr", &keep_cr, NULL,2203N_("do not pass --keep-cr flag to git-mailsplit independent of am.keepcr"),2204 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL,0},2205OPT_BOOL('c',"scissors", &state.scissors,2206N_("strip everything before a scissors line")),2207OPT_PASSTHRU_ARGV(0,"whitespace", &state.git_apply_opts,N_("action"),2208N_("pass it through git-apply"),22090),2210OPT_PASSTHRU_ARGV(0,"ignore-space-change", &state.git_apply_opts, NULL,2211N_("pass it through git-apply"),2212 PARSE_OPT_NOARG),2213OPT_PASSTHRU_ARGV(0,"ignore-whitespace", &state.git_apply_opts, NULL,2214N_("pass it through git-apply"),2215 PARSE_OPT_NOARG),2216OPT_PASSTHRU_ARGV(0,"directory", &state.git_apply_opts,N_("root"),2217N_("pass it through git-apply"),22180),2219OPT_PASSTHRU_ARGV(0,"exclude", &state.git_apply_opts,N_("path"),2220N_("pass it through git-apply"),22210),2222OPT_PASSTHRU_ARGV(0,"include", &state.git_apply_opts,N_("path"),2223N_("pass it through git-apply"),22240),2225OPT_PASSTHRU_ARGV('C', NULL, &state.git_apply_opts,N_("n"),2226N_("pass it through git-apply"),22270),2228OPT_PASSTHRU_ARGV('p', NULL, &state.git_apply_opts,N_("num"),2229N_("pass it through git-apply"),22300),2231OPT_CALLBACK(0,"patch-format", &patch_format,N_("format"),2232N_("format the patch(es) are in"),2233 parse_opt_patchformat),2234OPT_PASSTHRU_ARGV(0,"reject", &state.git_apply_opts, NULL,2235N_("pass it through git-apply"),2236 PARSE_OPT_NOARG),2237OPT_STRING(0,"resolvemsg", &state.resolvemsg, NULL,2238N_("override error message when patch failure occurs")),2239OPT_CMDMODE(0,"continue", &resume,2240N_("continue applying patches after resolving a conflict"),2241 RESUME_RESOLVED),2242OPT_CMDMODE('r',"resolved", &resume,2243N_("synonyms for --continue"),2244 RESUME_RESOLVED),2245OPT_CMDMODE(0,"skip", &resume,2246N_("skip the current patch"),2247 RESUME_SKIP),2248OPT_CMDMODE(0,"abort", &resume,2249N_("restore the original branch and abort the patching operation."),2250 RESUME_ABORT),2251OPT_BOOL(0,"committer-date-is-author-date",2252&state.committer_date_is_author_date,2253N_("lie about committer date")),2254OPT_BOOL(0,"ignore-date", &state.ignore_date,2255N_("use current timestamp for author date")),2256OPT_RERERE_AUTOUPDATE(&state.allow_rerere_autoupdate),2257{ OPTION_STRING,'S',"gpg-sign", &state.sign_commit,N_("key-id"),2258N_("GPG-sign commits"),2259 PARSE_OPT_OPTARG, NULL, (intptr_t)""},2260OPT_HIDDEN_BOOL(0,"rebasing", &state.rebasing,2261N_("(internal use for git-rebase)")),2262OPT_END()2263};22642265if(argc ==2&& !strcmp(argv[1],"-h"))2266usage_with_options(usage, options);22672268git_config(git_am_config, NULL);22692270am_state_init(&state);22712272 in_progress =am_in_progress(&state);2273if(in_progress)2274am_load(&state);22752276 argc =parse_options(argc, argv, prefix, options, usage,0);22772278if(binary >=0)2279fprintf_ln(stderr,_("The -b/--binary option has been a no-op for long time, and\n"2280"it will be removed. Please do not use it anymore."));22812282/* Ensure a valid committer ident can be constructed */2283git_committer_info(IDENT_STRICT);22842285if(read_index_preload(&the_index, NULL) <0)2286die(_("failed to read the index"));22872288if(in_progress) {2289/*2290 * Catch user error to feed us patches when there is a session2291 * in progress:2292 *2293 * 1. mbox path(s) are provided on the command-line.2294 * 2. stdin is not a tty: the user is trying to feed us a patch2295 * from standard input. This is somewhat unreliable -- stdin2296 * could be /dev/null for example and the caller did not2297 * intend to feed us a patch but wanted to continue2298 * unattended.2299 */2300if(argc || (resume == RESUME_FALSE && !isatty(0)))2301die(_("previous rebase directory%sstill exists but mbox given."),2302 state.dir);23032304if(resume == RESUME_FALSE)2305 resume = RESUME_APPLY;23062307if(state.signoff == SIGNOFF_EXPLICIT)2308am_append_signoff(&state);2309}else{2310struct argv_array paths = ARGV_ARRAY_INIT;2311int i;23122313/*2314 * Handle stray state directory in the independent-run case. In2315 * the --rebasing case, it is up to the caller to take care of2316 * stray directories.2317 */2318if(file_exists(state.dir) && !state.rebasing) {2319if(resume == RESUME_ABORT) {2320am_destroy(&state);2321am_state_release(&state);2322return0;2323}23242325die(_("Stray%sdirectory found.\n"2326"Use\"git am --abort\"to remove it."),2327 state.dir);2328}23292330if(resume)2331die(_("Resolve operation not in progress, we are not resuming."));23322333for(i =0; i < argc; i++) {2334if(is_absolute_path(argv[i]) || !prefix)2335argv_array_push(&paths, argv[i]);2336else2337argv_array_push(&paths,mkpath("%s/%s", prefix, argv[i]));2338}23392340am_setup(&state, patch_format, paths.argv, keep_cr);23412342argv_array_clear(&paths);2343}23442345switch(resume) {2346case RESUME_FALSE:2347am_run(&state,0);2348break;2349case RESUME_APPLY:2350am_run(&state,1);2351break;2352case RESUME_RESOLVED:2353am_resolve(&state);2354break;2355case RESUME_SKIP:2356am_skip(&state);2357break;2358case RESUME_ABORT:2359am_abort(&state);2360break;2361default:2362die("BUG: invalid resume value");2363}23642365am_state_release(&state);23662367return0;2368}