ext/gitdll/gitdll.c

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2015 - TortoiseGit
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 // gitdll.cpp : Defines the exported functions for the DLL application.
  20 //
  21
  22 #include "stdafx.h"
  23 #include "../build/libgit-defines.h"
  24 #include "git-compat-util.h"
  25 #include "gitdll.h"
  26 #include "cache.h"
  27 #include "commit.h"
  28 #include "diff.h"
  29 #include "revision.h"
  30 #include "diffcore.h"
  31 #include "dir.h"
  32 #include "builtin.h"
  33 #include "exec_cmd.h"
  34 #include "cache.h"
  35 #include "quote.h"
  36 #include "run-command.h"
  37 #include "mailmap.h"
  38
  39 extern char g_last_error[];
  40 const char * g_prefix;
  41
  42 extern void die_dll(const char *err, va_list params);
  43 extern int die_is_recursing_dll(void);
  44
  45 extern void free_all_pack();
  46 extern void reset_git_env();
  47 extern void invalidate_ref_cache(const char* submodule);
  48 extern void cmd_log_init(int argc, const char** argv, const char* prefix, struct rev_info* rev, struct setup_revision_opt* opt);
  49 extern int estimate_commit_count(struct rev_info* rev, struct commit_list* list);
  50 extern int log_tree_commit(struct rev_info*, struct commit*);
  51 extern int write_entry(struct cache_entry* ce, char* path, const struct checkout* state, int to_tempfile);
  52 extern struct object* deref_tag(struct object* o, const char* warn, int warnlen);
  53 extern void diff_flush_stat(struct diff_filepair* p, struct diff_options* o, struct diffstat_t* diffstat);
  54 extern void free_diffstat_info(struct diffstat_t* diffstat);
  55 extern int for_each_reflog_ent(const char* refname, each_reflog_ent_fn fn, void* cb_data);
  56 extern int for_each_ref_in(const char* prefix, each_ref_fn fn, void* cb_data);
  57
  58 void dll_entry()
  59 {
  60         set_die_routine(die_dll);
  61         set_die_is_recursing_routine(die_is_recursing_dll);
  62 }
  63
  64 int git_get_sha1(const char *name, GIT_HASH sha1)
  65 {
  66         return get_sha1(name,sha1);
  67 }
  68
  69 static int convert_slash(char * path)
  70 {
  71         while(*path)
  72         {
  73                 if(*path == '\\' )
  74                         *path = '/';
  75                 path++;
  76         }
  77         return 0;
  78 }
  79
  80 int git_init()
  81 {
  82         char path[MAX_PATH+1];
  83         int ret;
  84         size_t homesize;
  85
  86         _fmode = _O_BINARY;
  87         _setmode(_fileno(stdin), _O_BINARY);
  88         _setmode(_fileno(stdout), _O_BINARY);
  89         _setmode(_fileno(stderr), _O_BINARY);
  90
  91         // set HOME if not set already
  92         getenv_s(&homesize, NULL, 0, "HOME");
  93         if (!homesize)
  94         {
  95                 _wputenv_s(L"HOME", wget_windows_home_directory());
  96         }
  97         GetModuleFileName(NULL, path, MAX_PATH);
  98         convert_slash(path);
  99
 100         git_extract_argv0_path(path);
 101         reset_git_env();
 102         g_prefix = setup_git_directory();
 103         ret = git_config(git_default_config, NULL);
 104
 105         if (!homesize)
 106         {
 107                 _putenv_s("HOME","");/* clear home evironment to avoid affact third part software*/
 108         }
 109
 110         return ret;
 111 }
 112
 113 static int git_parse_commit_author(struct GIT_COMMIT_AUTHOR *author, char *pbuff)
 114 {
 115         char *end;
 116
 117         author->Name=pbuff;
 118         end=strchr(pbuff,'<');
 119         if( end == 0)
 120         {
 121                 return -1;
 122         }
 123         author->NameSize = (int)(end - pbuff - 1);
 124
 125         pbuff = end +1;
 126         end = strchr(pbuff, '>');
 127         if( end == 0)
 128                 return -1;
 129
 130         author->Email = pbuff ;
 131         author->EmailSize = (int)(end - pbuff);
 132
 133         pbuff = end + 2;
 134
 135         author->Date = atol(pbuff);
 136         end =  strchr(pbuff, ' ');
 137         if( end == 0 )
 138                 return -1;
 139
 140         pbuff=end;
 141         author->TimeZone = atol(pbuff);
 142
 143         return 0;
 144 }
 145
 146 int git_parse_commit(GIT_COMMIT *commit)
 147 {
 148         int ret = 0;
 149         char *pbuf;
 150         char *end;
 151         struct commit *p;
 152
 153         p= (struct commit *)commit->m_pGitCommit;
 154
 155         memcpy(commit->m_hash,p->object.sha1,GIT_HASH_SIZE);
 156
 157         commit->m_Encode = NULL;
 158         commit->m_EncodeSize = 0;
 159
 160         if(p->buffer == NULL)
 161                 return -3;
 162
 163         pbuf = p->buffer;
 164         while(pbuf)
 165         {
 166                 if (strncmp(pbuf, "author", 6) == 0)
 167                 {
 168                         ret = git_parse_commit_author(&commit->m_Author,pbuf + 7);
 169                         if(ret)
 170                                 return -4;
 171                 }
 172                 else if (strncmp(pbuf, "committer", 9) == 0)
 173                 {
 174                         ret =  git_parse_commit_author(&commit->m_Committer,pbuf + 10);
 175                         if(ret)
 176                                 return -5;
 177
 178                         pbuf = strchr(pbuf,'\n');
 179                         if(pbuf == NULL)
 180                                 return -6;
 181                 }
 182                 else if (strncmp(pbuf, "encoding", 8) == 0)
 183                 {
 184                         pbuf += 9;
 185                         commit->m_Encode=pbuf;
 186                         end = strchr(pbuf,'\n');
 187                         commit->m_EncodeSize= (int)(end -pbuf);
 188                 }
 189
 190                 // the headers end after the first empty line
 191                 else if (*pbuf == '\n')
 192                 {
 193                         pbuf++;
 194
 195                         commit->m_Subject=pbuf;
 196                         end = strchr(pbuf,'\n');
 197                         if( end == 0)
 198                                 commit->m_SubjectSize = strlen(pbuf);
 199                         else
 200                         {
 201                                 commit->m_SubjectSize = (int)(end - pbuf);
 202                                 pbuf = end +1;
 203                                 commit->m_Body = pbuf;
 204                                 commit->m_BodySize = strlen(pbuf);
 205                                 return 0;
 206                         }
 207                 }
 208
 209                 pbuf = strchr(pbuf,'\n');
 210                 if(pbuf)
 211                         pbuf ++;
 212         }
 213         return 0;
 214 }
 215
 216 int git_get_commit_from_hash(GIT_COMMIT *commit, GIT_HASH hash)
 217 {
 218         int ret = 0;
 219
 220         struct commit *p;
 221
 222         if (commit == NULL)
 223                 return -1;
 224
 225         memset(commit,0,sizeof(GIT_COMMIT));
 226
 227         commit->m_pGitCommit = p = lookup_commit(hash);
 228
 229         if(p == NULL)
 230                 return -1;
 231
 232         ret = parse_commit(p);
 233         if( ret )
 234                 return ret;
 235
 236         return git_parse_commit(commit);
 237 }
 238
 239 int git_get_commit_first_parent(GIT_COMMIT *commit,GIT_COMMIT_LIST *list)
 240 {
 241         struct commit *p = commit->m_pGitCommit;
 242
 243         if(list == NULL)
 244                 return -1;
 245
 246         *list = (GIT_COMMIT_LIST*)p->parents;
 247         return 0;
 248 }
 249 int git_get_commit_next_parent(GIT_COMMIT_LIST *list, GIT_HASH hash)
 250 {
 251         struct commit_list *l;
 252         if (list == NULL)
 253                 return -1;
 254
 255         l = *(struct commit_list **)list;
 256         if (l == NULL)
 257                 return -1;
 258
 259         if(hash)
 260                 memcpy(hash, l->item->object.sha1, GIT_HASH_SIZE);
 261
 262         *list = (GIT_COMMIT_LIST *)l->next;
 263         return 0;
 264
 265 }
 266
 267
 268 int git_free_commit(GIT_COMMIT *commit)
 269 {
 270         struct commit *p = commit->m_pGitCommit;
 271
 272         if( p->parents)
 273                 free_commit_list(p->parents);
 274
 275         if( p->buffer )
 276         {
 277                 free(p->buffer);
 278                 p->buffer=NULL;
 279                 p->object.parsed=0;
 280                 p->parents=0;
 281                 p->tree=0;
 282         }
 283         memset(commit,0,sizeof(GIT_COMMIT));
 284         return 0;
 285 }
 286
 287 char **strtoargv(char *arg, int *size)
 288 {
 289         int count=0;
 290         char *p=arg;
 291         char **argv;
 292
 293         int i=0;
 294         while(*p)
 295         {
 296                 if(*p == '\\')
 297                         *p='/';
 298                 p++;
 299         }
 300         p=arg;
 301
 302         while(*p)
 303         {
 304                 if(*p == ' ')
 305                         count ++;
 306                 p++;
 307         }
 308
 309         argv=malloc(strlen(arg)+1 + (count +2)*sizeof(void*));
 310         p=(char*)(argv+count+2);
 311
 312         while(*arg)
 313         {
 314                 if(*arg != ' ')
 315                 {
 316                         char space=' ';
 317                         argv[i]=p;
 318
 319                         while(*arg)
 320                         {
 321                                 if(*arg == '"')
 322                                 {
 323                                         arg++;
 324                                         if(space == ' ')
 325                                                 space = '"';
 326                                         else
 327                                                 space = ' ';
 328                                 }
 329                                 if((*arg == space) || (*arg == 0))
 330                                         break;
 331
 332                                 *p++ = *arg++;
 333                         }
 334                         i++;
 335                         *p++=0;
 336                 }
 337                 if(*arg == 0)
 338                         break;
 339                 arg++;
 340         }
 341         argv[i]=NULL;
 342         *size = i;
 343         return argv;
 344 }
 345 int git_open_log(GIT_LOG * handle, char * arg)
 346 {
 347         struct rev_info *p_Rev;
 348         char ** argv=0;
 349         int argc=0;
 350         unsigned int i=0;
 351         struct setup_revision_opt opt;
 352
 353         /* clear flags */
 354         unsigned int obj_size = get_max_object_index();
 355         for(i =0; i<obj_size; i++)
 356         {
 357                 struct object *ob= get_indexed_object(i);
 358                 if(ob)
 359                         ob->flags=0;
 360         }
 361
 362         if(arg != NULL)
 363                 argv = strtoargv(arg,&argc);
 364
 365         if (!argv)
 366                 return -1;
 367
 368         p_Rev = malloc(sizeof(struct rev_info));
 369         if (p_Rev == NULL)
 370         {
 371                 free(argv);
 372                 return -1;
 373         }
 374
 375         memset(p_Rev,0,sizeof(struct rev_info));
 376
 377         invalidate_ref_cache(NULL);
 378
 379         init_revisions(p_Rev, g_prefix);
 380         p_Rev->diff = 1;
 381
 382         memset(&opt, 0, sizeof(opt));
 383         opt.def = "HEAD";
 384
 385         cmd_log_init(argc, argv, g_prefix,p_Rev,&opt);
 386
 387         p_Rev->pPrivate = argv;
 388         *handle = p_Rev;
 389         return 0;
 390
 391 }
 392 int git_get_log_firstcommit(GIT_LOG handle)
 393 {
 394         return prepare_revision_walk(handle);
 395 }
 396
 397 int git_get_log_estimate_commit_count(GIT_LOG handle)
 398 {
 399         struct rev_info *p_Rev;
 400         p_Rev=(struct rev_info *)handle;
 401
 402         return estimate_commit_count(p_Rev, p_Rev->commits);
 403 }
 404
 405 int git_get_log_nextcommit(GIT_LOG handle, GIT_COMMIT *commit, int follow)
 406 {
 407         int ret =0;
 408
 409         if(commit == NULL)
 410                 return -1;
 411
 412         memset(commit, 0, sizeof(GIT_COMMIT));
 413
 414         commit->m_pGitCommit = get_revision(handle);
 415         if( commit->m_pGitCommit == NULL)
 416                 return -2;
 417
 418         if (follow && !log_tree_commit(handle, commit->m_pGitCommit))
 419         {
 420                 commit->m_ignore = 1;
 421                 return 0;
 422         }
 423         commit->m_ignore = 0;
 424
 425         ret=git_parse_commit(commit);
 426         if(ret)
 427                 return ret;
 428
 429         return 0;
 430 }
 431
 432 struct notes_tree **display_notes_trees;
 433 int git_close_log(GIT_LOG handle)
 434 {
 435         if(handle)
 436         {
 437                 struct rev_info *p_Rev;
 438                 p_Rev=(struct rev_info *)handle;
 439                 if(p_Rev->pPrivate)
 440                         free(p_Rev->pPrivate);
 441                 free(handle);
 442         }
 443         free_all_pack();
 444
 445         if (display_notes_trees)
 446                 free_notes(*display_notes_trees);
 447         display_notes_trees = 0;
 448         return 0;
 449 }
 450
 451 int git_open_diff(GIT_DIFF *diff, char * arg)
 452 {
 453         struct rev_info *p_Rev;
 454         char ** argv=0;
 455         int argc=0;
 456
 457         if(arg != NULL)
 458                 argv = strtoargv(arg,&argc);
 459
 460         p_Rev = malloc(sizeof(struct rev_info));
 461         memset(p_Rev,0,sizeof(struct rev_info));
 462
 463         p_Rev->pPrivate = argv;
 464         *diff = (GIT_DIFF)p_Rev;
 465
 466         init_revisions(p_Rev, g_prefix);
 467         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 468         p_Rev->abbrev = 0;
 469         p_Rev->diff = 1;
 470         argc = setup_revisions(argc, argv, p_Rev, NULL);
 471
 472         return 0;
 473 }
 474 int git_close_diff(GIT_DIFF handle)
 475 {
 476         git_diff_flush(handle);
 477         if(handle)
 478         {
 479                 struct rev_info *p_Rev;
 480                 p_Rev=(struct rev_info *)handle;
 481                 if(p_Rev->pPrivate)
 482                         free(p_Rev->pPrivate);
 483                 free(handle);
 484         }
 485         return 0;
 486 }
 487 int git_diff_flush(GIT_DIFF diff)
 488 {
 489         struct diff_queue_struct *q = &diff_queued_diff;
 490         struct rev_info *p_Rev;
 491         int i;
 492         p_Rev = (struct rev_info *)diff;
 493
 494         if(q->nr == 0)
 495                 return 0;
 496
 497         for (i = 0; i < q->nr; i++)
 498                 diff_free_filepair(q->queue[i]);
 499
 500         if(q->queue)
 501         {
 502                 free(q->queue);
 503                 q->queue = NULL;
 504                 q->nr = q->alloc = 0;
 505         }
 506
 507         if (p_Rev->diffopt.close_file)
 508                 fclose(p_Rev->diffopt.file);
 509
 510         free_diffstat_info(&p_Rev->diffstat);
 511         return 0;
 512 }
 513
 514 int git_root_diff(GIT_DIFF diff, GIT_HASH hash,GIT_FILE *file, int *count, int isstat)
 515 {
 516         int ret;
 517         struct rev_info *p_Rev;
 518         int i;
 519         struct diff_queue_struct *q = &diff_queued_diff;
 520
 521         p_Rev = (struct rev_info *)diff;
 522
 523         ret=diff_root_tree_sha1(hash, "", &p_Rev->diffopt);
 524
 525         if(ret)
 526                 return ret;
 527
 528         if(isstat)
 529         {
 530                 diffcore_std(&p_Rev->diffopt);
 531
 532                 memset(&p_Rev->diffstat, 0, sizeof(struct diffstat_t));
 533                 for (i = 0; i < q->nr; i++) {
 534                         struct diff_filepair *p = q->queue[i];
 535                         //if (check_pair_status(p))
 536                         diff_flush_stat(p, &p_Rev->diffopt, &p_Rev->diffstat);
 537                 }
 538
 539                 if(file)
 540                         *file = q;
 541                 if(count)
 542                         *count = q->nr;
 543         }
 544         return 0;
 545 }
 546
 547 int git_do_diff(GIT_DIFF diff, GIT_HASH hash1, GIT_HASH hash2, GIT_FILE * file, int *count,int isstat)
 548 {
 549         struct rev_info *p_Rev;
 550         int ret;
 551         int i;
 552         struct diff_queue_struct *q = &diff_queued_diff;
 553
 554         p_Rev = (struct rev_info *)diff;
 555
 556         ret = diff_tree_sha1(hash1,hash2,"",&p_Rev->diffopt);
 557         if( ret )
 558         {
 559                 free_all_pack();
 560                 return ret;
 561         }
 562
 563         if(isstat)
 564         {
 565                 diffcore_std(&p_Rev->diffopt);
 566                 memset(&p_Rev->diffstat, 0, sizeof(struct diffstat_t));
 567                 for (i = 0; i < q->nr; i++) {
 568                         struct diff_filepair *p = q->queue[i];
 569                         //if (check_pair_status(p))
 570                         diff_flush_stat(p, &p_Rev->diffopt, &p_Rev->diffstat);
 571                 }
 572         }
 573         free_all_pack();
 574         if(file)
 575                 *file = q;
 576         if(count)
 577                 *count = q->nr;
 578         return 0;
 579 }
 580
 581 int git_get_diff_file(GIT_DIFF diff,GIT_FILE file,int i, char **newname, char ** oldname,  int *status, int *IsBin, int *inc, int *dec)
 582 {
 583         struct diff_queue_struct *q = &diff_queued_diff;
 584         struct rev_info *p_Rev;
 585         p_Rev = (struct rev_info *)diff;
 586
 587         q = (struct diff_queue_struct *)file;
 588         if(file == 0)
 589                 return -1;
 590         if(i>=q->nr)
 591                 return -1;
 592
 593         assert(newname && oldname && status);
 594
 595         *newname = q->queue[i]->two->path;
 596         *oldname = q->queue[i]->one->path;
 597         *status = q->queue[i]->status;
 598
 599         if(p_Rev->diffstat.files)
 600         {
 601                 int j;
 602                 for(j=0;j<p_Rev->diffstat.nr;j++)
 603                 {
 604                         if(strcmp(*newname,p_Rev->diffstat.files[j]->name)==0)
 605                                 break;
 606                 }
 607                 if( j== p_Rev->diffstat.nr)
 608                 {
 609                         *IsBin=1;
 610                         *inc=0;
 611                         *dec=0;
 612                         return 0;
 613                 }
 614                 if(IsBin)
 615                         *IsBin = p_Rev->diffstat.files[j]->is_binary;
 616                 if(inc)
 617                         *inc = (int)p_Rev->diffstat.files[j]->added;
 618                 if(dec)
 619                         *dec = (int)p_Rev->diffstat.files[j]->deleted;
 620         }else
 621         {
 622                 *IsBin=1;
 623                 *inc=0;
 624                 *dec=0;
 625         }
 626
 627         return 0;
 628 }
 629
 630 int git_read_tree(GIT_HASH hash,read_tree_fn_t fn, void *context)
 631 {
 632         struct tree * root;
 633         int ret;
 634         reprepare_packed_git();
 635         root = parse_tree_indirect(hash);
 636
 637         if (!root)
 638         {
 639                 free_all_pack();
 640                 return -1;
 641         }
 642         ret = read_tree_recursive(root, NULL, 0, 0, NULL, fn, context);
 643         free_all_pack();
 644         return ret;
 645 }
 646
 647 int git_add_exclude(const char *string, const char *base,
 648                                         int baselen, struct exclude_list *which, int lineno)
 649 {
 650         add_exclude(string, base, baselen, which, lineno);
 651         return 0;
 652 }
 653
 654 int git_create_exclude_list(EXCLUDE_LIST *which)
 655 {
 656         *which = malloc(sizeof(struct exclude_list));
 657         memset(*which,0,sizeof(struct exclude_list));
 658         return 0;
 659 }
 660
 661 int git_free_exclude_list(EXCLUDE_LIST which)
 662 {
 663         int i=0;
 664         struct exclude_list *p = (struct exclude_list *) which;
 665
 666         for(i=0; i<p->nr;i++)
 667         {
 668                 free(p->excludes[i]);
 669         }
 670         free(p->excludes);
 671         free(p);
 672         return 0;
 673 }
 674
 675 int git_check_excluded_1(const char *pathname,
 676                                                         int pathlen, const char *basename, int *dtype,
 677                                                         EXCLUDE_LIST el)
 678 {
 679         return is_excluded_from_list(pathname, pathlen, basename, dtype, el);
 680 }
 681
 682 int git_get_notes(GIT_HASH hash, char **p_note)
 683 {
 684         struct strbuf sb;
 685         size_t size;
 686         strbuf_init(&sb,0);
 687         format_display_notes(hash, &sb, "utf-8", 1);
 688         *p_note = strbuf_detach(&sb,&size);
 689
 690         return 0;
 691 }
 692
 693 struct cmd_struct {
 694         const char *cmd;
 695         int (*fn)(int, const char **, const char *);
 696         int option;
 697 };
 698
 699 #define RUN_SETUP       (1<<0)
 700 #define USE_PAGER       (1<<1)
 701 /*
 702  * require working tree to be present -- anything uses this needs
 703  * RUN_SETUP for reading from the configuration file.
 704  */
 705 #define NEED_WORK_TREE  (1<<2)
 706
 707 const char git_usage_string[] =
 708         "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
 709         "           [-p|--paginate|--no-pager] [--no-replace-objects]\n"
 710         "           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
 711         "           [-c name=value] [--help]\n"
 712         "           COMMAND [ARGS]";
 713
 714 const char git_more_info_string[] =
 715         "See 'git help COMMAND' for more information on a specific command.";
 716
 717 static struct cmd_struct commands[] = {
 718                 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 719                 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 720                 { "annotate", cmd_annotate, RUN_SETUP },
 721                 { "apply", cmd_apply },
 722                 { "archive", cmd_archive },
 723                 { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
 724                 { "blame", cmd_blame, RUN_SETUP },
 725                 { "branch", cmd_branch, RUN_SETUP },
 726                 { "bundle", cmd_bundle },
 727                 { "cat-file", cmd_cat_file, RUN_SETUP },
 728                 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
 729                 { "checkout-index", cmd_checkout_index,
 730                         RUN_SETUP | NEED_WORK_TREE},
 731                 { "check-ref-format", cmd_check_ref_format },
 732                 { "check-attr", cmd_check_attr, RUN_SETUP },
 733                 { "cherry", cmd_cherry, RUN_SETUP },
 734                 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
 735                 { "clone", cmd_clone },
 736                 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
 737                 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
 738                 { "commit-tree", cmd_commit_tree, RUN_SETUP },
 739                 { "config", cmd_config },
 740                 { "count-objects", cmd_count_objects, RUN_SETUP },
 741                 { "describe", cmd_describe, RUN_SETUP },
 742                 { "diff", cmd_diff },
 743                 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
 744                 { "diff-index", cmd_diff_index, RUN_SETUP },
 745                 { "diff-tree", cmd_diff_tree, RUN_SETUP },
 746                 { "fast-export", cmd_fast_export, RUN_SETUP },
 747                 { "fetch", cmd_fetch, RUN_SETUP },
 748                 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
 749                 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
 750                 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
 751                 { "format-patch", cmd_format_patch, RUN_SETUP },
 752                 { "fsck", cmd_fsck, RUN_SETUP },
 753                 { "fsck-objects", cmd_fsck, RUN_SETUP },
 754                 { "gc", cmd_gc, RUN_SETUP },
 755                 { "get-tar-commit-id", cmd_get_tar_commit_id },
 756                 { "grep", cmd_grep },
 757                 { "hash-object", cmd_hash_object },
 758                 { "help", cmd_help },
 759                 { "index-pack", cmd_index_pack },
 760                 { "init", cmd_init_db },
 761                 { "init-db", cmd_init_db },
 762                 { "log", cmd_log, RUN_SETUP },
 763                 { "ls-files", cmd_ls_files, RUN_SETUP },
 764                 { "ls-tree", cmd_ls_tree, RUN_SETUP },
 765                 { "ls-remote", cmd_ls_remote },
 766                 { "mailinfo", cmd_mailinfo },
 767                 { "mailsplit", cmd_mailsplit },
 768                 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
 769                 { "merge-base", cmd_merge_base, RUN_SETUP },
 770                 { "merge-file", cmd_merge_file },
 771                 { "merge-index", cmd_merge_index, RUN_SETUP },
 772                 { "merge-ours", cmd_merge_ours, RUN_SETUP },
 773                 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 774                 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 775                 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 776                 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 777                 { "merge-tree", cmd_merge_tree, RUN_SETUP },
 778                 { "mktag", cmd_mktag, RUN_SETUP },
 779                 { "mktree", cmd_mktree, RUN_SETUP },
 780                 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
 781                 { "name-rev", cmd_name_rev, RUN_SETUP },
 782                 { "notes", cmd_notes, RUN_SETUP },
 783                 { "pack-objects", cmd_pack_objects, RUN_SETUP },
 784                 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
 785                 { "patch-id", cmd_patch_id },
 786                 { "pickaxe", cmd_blame, RUN_SETUP },
 787                 { "prune", cmd_prune, RUN_SETUP },
 788                 { "prune-packed", cmd_prune_packed, RUN_SETUP },
 789                 { "push", cmd_push, RUN_SETUP },
 790                 { "read-tree", cmd_read_tree, RUN_SETUP },
 791                 { "receive-pack", cmd_receive_pack },
 792                 { "reflog", cmd_reflog, RUN_SETUP },
 793                 { "remote", cmd_remote, RUN_SETUP },
 794                 { "replace", cmd_replace, RUN_SETUP },
 795                 { "rerere", cmd_rerere, RUN_SETUP },
 796                 { "reset", cmd_reset, RUN_SETUP },
 797                 { "rev-list", cmd_rev_list, RUN_SETUP },
 798                 { "rev-parse", cmd_rev_parse },
 799                 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
 800                 { "rm", cmd_rm, RUN_SETUP },
 801                 { "send-pack", cmd_send_pack, RUN_SETUP },
 802                 { "shortlog", cmd_shortlog, USE_PAGER },
 803                 { "show-branch", cmd_show_branch, RUN_SETUP },
 804                 { "show", cmd_show, RUN_SETUP },
 805                 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
 806                 { "stripspace", cmd_stripspace },
 807                 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
 808                 { "tag", cmd_tag, RUN_SETUP },
 809                 { "unpack-file", cmd_unpack_file, RUN_SETUP },
 810                 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
 811                 { "update-index", cmd_update_index, RUN_SETUP },
 812                 { "update-ref", cmd_update_ref, RUN_SETUP },
 813                 { "update-server-info", cmd_update_server_info, RUN_SETUP },
 814                 { "upload-archive", cmd_upload_archive },
 815                 { "var", cmd_var },
 816                 { "verify-tag", cmd_verify_tag, RUN_SETUP },
 817                 { "version", cmd_version },
 818                 { "whatchanged", cmd_whatchanged, RUN_SETUP },
 819                 { "write-tree", cmd_write_tree, RUN_SETUP },
 820                 { "verify-pack", cmd_verify_pack },
 821                 { "show-ref", cmd_show_ref, RUN_SETUP },
 822                 { "pack-refs", cmd_pack_refs, RUN_SETUP },
 823         };
 824
 825 int is_builtin(const char *s)
 826 {
 827         int i;
 828         for (i = 0; i < ARRAY_SIZE(commands); i++) {
 829                 struct cmd_struct *p = commands+i;
 830                 if (!strcmp(s, p->cmd))
 831                         return 1;
 832         }
 833         return 0;
 834 }
 835
 836 int git_run_cmd(char *cmd, char *arg)
 837 {
 838
 839         int i=0;
 840         char ** argv=0;
 841         int argc=0;
 842
 843         git_init();
 844
 845         for(i=0;i<      sizeof(commands) / sizeof(struct cmd_struct);i++)
 846         {
 847                 if(strcmp(cmd,commands[i].cmd)==0)
 848                 {
 849                         int ret;
 850                         if(arg != NULL)
 851                                 argv = strtoargv(arg,&argc);
 852
 853                         ret = commands[i].fn(argc, argv, NULL);
 854
 855                         if(argv)
 856                                 free(argv);
 857
 858                         discard_cache();
 859                         free_all_pack();
 860
 861                         return ret;
 862
 863
 864                 }
 865         }
 866         return -1;
 867 }
 868
 869 int git_for_each_ref_in(const char * refname, each_ref_fn fn, void * data)
 870 {
 871         int ret;
 872         invalidate_ref_cache(NULL);
 873         ret = for_each_ref_in(refname, fn, data);
 874         free_all_pack();
 875         return ret;
 876 }
 877
 878 const char *git_resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
 879 {
 880         invalidate_ref_cache(NULL);
 881         return resolve_ref_unsafe(ref,sha1,reading, flag);
 882 }
 883 int git_for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
 884 {
 885         return for_each_reflog_ent(ref,fn,cb_data);
 886 }
 887
 888 int git_deref_tag(const unsigned char *tagsha1, GIT_HASH refhash)
 889 {
 890         struct object *obj = NULL;
 891         obj = parse_object(tagsha1);
 892         if (!obj)
 893                 return -1;
 894
 895         if (obj->type == OBJ_TAG)
 896         {
 897                         obj = deref_tag(obj, "", 0);
 898                         if (!obj)
 899                                 return -1;
 900
 901                         memcpy(refhash, obj->sha1, sizeof(GIT_HASH));
 902                         return 0;
 903         }
 904
 905         return -1;
 906 }
 907
 908 static int update_some(const unsigned char *sha1, const char *base, int baselen,
 909                 const char *pathname, unsigned mode, int stage, void *context)
 910 {
 911         struct cache_entry *ce;
 912         UNREFERENCED_PARAMETER(stage);
 913
 914         ce = (struct cache_entry *)context;
 915
 916         if (S_ISDIR(mode))
 917                 return READ_TREE_RECURSIVE;
 918
 919         hashcpy(ce->sha1, sha1);
 920         memcpy(ce->name, base, baselen);
 921         memcpy(ce->name + baselen, pathname, strlen(pathname));
 922         ce->ce_flags = create_ce_flags(strlen(pathname) + baselen);
 923         ce->ce_mode = create_ce_mode(mode);
 924
 925         return 0;
 926 }
 927
 928 int git_checkout_file(const char* ref, const char* path, char* outputpath)
 929 {
 930         struct cache_entry *ce;
 931         int ret;
 932         GIT_HASH sha1;
 933         struct tree * root;
 934         struct checkout state;
 935         struct pathspec pathspec;
 936         const char *matchbuf[1];
 937         ret = get_sha1(ref, sha1);
 938         if(ret)
 939                 return ret;
 940
 941         reprepare_packed_git();
 942         root = parse_tree_indirect(sha1);
 943
 944         if(!root)
 945         {
 946                 free_all_pack();
 947                 return -1;
 948         }
 949
 950         ce = xcalloc(1, cache_entry_size(strlen(path)));
 951
 952         matchbuf[0] = NULL;
 953         parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC, PATHSPEC_PREFER_CWD, path, matchbuf);
 954         pathspec.items[0].nowildcard_len = pathspec.items[0].len;
 955         ret = read_tree_recursive(root, "", 0, 0, &pathspec, update_some, ce);
 956         free_pathspec(&pathspec);
 957
 958         if(ret)
 959         {
 960                 free_all_pack();
 961                 free(ce);
 962                 return ret;
 963         }
 964         memset(&state, 0, sizeof(state));
 965         state.force = 1;
 966         state.refresh_cache = 0;
 967
 968         ret = write_entry(ce, outputpath, &state, 0);
 969         free_all_pack();
 970         free(ce);
 971         return ret;
 972 }
 973 struct config_buf
 974 {
 975         char *buf;
 976         const char *key;
 977         size_t size;
 978         int seen;
 979 };
 980
 981 static int get_config(const char *key_, const char *value_, void *cb)
 982 {
 983         struct config_buf *buf;
 984         buf=(struct config_buf*)cb;
 985         if(strcmp(key_, buf->key))
 986                 return 0;
 987
 988         if (value_)
 989                 strncpy(buf->buf,value_,buf->size);
 990         else
 991         {
 992                 buf->buf[0] = 't';
 993                 buf->buf[1] = 'r';
 994                 buf->buf[2] = 'u';
 995                 buf->buf[3] = 'e';
 996                 buf->buf[4] = 0;
 997         }
 998         buf->seen = 1;
 999         return 0;
1000
1001 }
1002
1003 // wchar_t wrapper for git_etc_gitconfig()
1004 const wchar_t *wget_msysgit_etc(void)
1005 {
1006         static const wchar_t *etc_gitconfig = NULL;
1007         wchar_t wpointer[MAX_PATH];
1008
1009         if (etc_gitconfig)
1010                 return etc_gitconfig;
1011
1012         if (xutftowcs_path(wpointer, git_etc_gitconfig()) < 0)
1013                 return NULL;
1014
1015         etc_gitconfig = _wcsdup(wpointer);
1016
1017         return etc_gitconfig;
1018 }
1019
1020 int git_get_config(const char *key, char *buffer, int size)
1021 {
1022         char *local, *global, *globalxdg;
1023         const char *home, *system;
1024         struct config_buf buf;
1025
1026         buf.buf=buffer;
1027         buf.size=size;
1028         buf.seen = 0;
1029         buf.key = key;
1030
1031         home = get_windows_home_directory();
1032         if (home)
1033         {
1034                 global = xstrdup(mkpath("%s/.gitconfig", home));
1035                 globalxdg = xstrdup(mkpath("%s/.config/git/config", home));
1036         }
1037         else
1038         {
1039                 global = NULL;
1040                 globalxdg = NULL;
1041         }
1042
1043         system = git_etc_gitconfig();
1044
1045         local = git_pathdup("config");
1046
1047         if ( !buf.seen)
1048                 git_config_with_options(get_config, &buf, local, NULL, 1);
1049         if (!buf.seen && global)
1050                 git_config_with_options(get_config, &buf, global, NULL, 1);
1051         if (!buf.seen && globalxdg)
1052                 git_config_with_options(get_config, &buf, globalxdg, NULL, 1);
1053         if (!buf.seen && system)
1054                 git_config_with_options(get_config, &buf, system, NULL, 1);
1055
1056         if(local)
1057                 free(local);
1058         if(global)
1059                 free(global);
1060         if (globalxdg)
1061                 free(globalxdg);
1062
1063         return !buf.seen;
1064 }
1065
1066 // taken from msysgit: compat/mingw.c
1067 const char *get_windows_home_directory(void)
1068 {
1069         static const char *home_directory = NULL;
1070         struct strbuf buf = STRBUF_INIT;
1071
1072         if (home_directory)
1073                 return home_directory;
1074
1075         home_directory = getenv("HOME");
1076         if (home_directory && *home_directory)
1077                 return home_directory;
1078
1079         strbuf_addf(&buf, "%s%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1080         home_directory = strbuf_detach(&buf, NULL);
1081
1082         return home_directory;
1083 }
1084
1085 // wchar_t wrapper for get_windows_home_directory()
1086 const wchar_t *wget_windows_home_directory(void)
1087 {
1088         static const wchar_t *home_directory = NULL;
1089         wchar_t wpointer[MAX_PATH];
1090
1091         if (home_directory)
1092                 return home_directory;
1093
1094         if (xutftowcs_path(wpointer, get_windows_home_directory()) < 0)
1095                 return NULL;
1096
1097         home_directory = _wcsdup(wpointer);
1098
1099         return home_directory;
1100 }
1101
1102 int get_set_config(const char *key, const char *value, CONFIG_TYPE type)
1103 {
1104         char * config_exclusive_filename = NULL;
1105
1106         switch(type)
1107         {
1108         case CONFIG_LOCAL:
1109                 config_exclusive_filename  = git_pathdup("config");
1110                 break;
1111         case CONFIG_GLOBAL:
1112         case CONFIG_XDGGLOBAL:
1113                 {
1114                         const char *home = get_windows_home_directory();
1115                         if (home)
1116                         {
1117                                 if (type == CONFIG_GLOBAL)
1118                                         config_exclusive_filename = xstrdup(mkpath("%s/.gitconfig", home));
1119                                 else
1120                                         config_exclusive_filename = xstrdup(mkpath("%s/.config/git/config", home));
1121                         }
1122                 }
1123                 break;
1124         }
1125
1126         if(!config_exclusive_filename)
1127                 return -1;
1128
1129         return git_config_set_multivar_in_file(config_exclusive_filename, key, value, NULL, 0);
1130 }
1131
1132 struct mailmap_info {
1133         char *name;
1134         char *email;
1135 };
1136
1137 struct mailmap_entry {
1138         /* name and email for the simple mail-only case */
1139         char *name;
1140         char *email;
1141
1142         /* name and email for the complex mail and name matching case */
1143         struct string_list namemap;
1144 };
1145
1146 int git_read_mailmap(GIT_MAILMAP *mailmap)
1147 {
1148         struct string_list *map;
1149         int result;
1150
1151         if (!mailmap)
1152                 return -1;
1153
1154         *mailmap = NULL;
1155         if ((map = (struct string_list *)calloc(1, sizeof(struct string_list))) == NULL)
1156                 return -1;
1157
1158         if ((result = read_mailmap(map, NULL)) != 0)
1159                 return result;
1160
1161         *mailmap = map;
1162         return 0;
1163 }
1164
1165 const char * git_get_mailmap_author(GIT_MAILMAP mailmap, const char *email2, void *payload, const char *(*author2_cb)(void *))
1166 {
1167         struct string_list *map;
1168         int imax, imin = 0;
1169
1170         if (!mailmap)
1171                 return NULL;
1172
1173         map = (struct string_list *)mailmap;
1174         imax = map->nr - 1;
1175         while (imax >= imin)
1176         {
1177                 int i = imin + ((imax - imin) / 2);
1178                 struct string_list_item *si = (struct string_list_item *)&map->items[i];
1179                 struct mailmap_entry *me = (struct mailmap_entry *)si->util;
1180                 int comp = strcmp(si->string, email2);
1181
1182                 if (!comp)
1183                 {
1184                         if (me->namemap.nr)
1185                         {
1186                                 const char *author2 = author2_cb(payload);
1187                                 unsigned int j;
1188                                 for (j = 0; j < me->namemap.nr; ++j)
1189                                 {
1190                                         struct string_list_item *sj = (struct string_list_item *)&me->namemap.items[j];
1191                                         struct mailmap_info *mi = (struct mailmap_info *)sj->util;
1192
1193                                         if (!strcmp(sj->string, author2))
1194                                                 return mi->name;
1195                                 }
1196                         }
1197
1198                         return me->name;
1199                 }
1200                 else if (comp < 0)
1201                         imin = i + 1;
1202                 else
1203                         imax = i - 1;
1204         }
1205
1206         return NULL;
1207 }
1208
1209 void git_free_mailmap(GIT_MAILMAP mailmap)
1210 {
1211         if (!mailmap)
1212                 return;
1213
1214         clear_mailmap((struct string_list *)mailmap);
1215         free(mailmap);
1216 }
1217