ext/gitdll/gitdll.c

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2012 - 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 "git-compat-util.h"
  24 #include "msvc.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
  38 const char git_version_string[] = GIT_VERSION;
  39
  40
  41 #if 0
  42
  43 // This is an example of an exported variable
  44 GITDLL_API int ngitdll=0;
  45
  46 // This is an example of an exported function.
  47 GITDLL_API int fngitdll(void)
  48 {
  49         return 42;
  50 }
  51
  52 // This is the constructor of a class that has been exported.
  53 // see gitdll.h for the class definition
  54 Cgitdll::Cgitdll()
  55 {
  56         return;
  57 }
  58 #endif
  59
  60 extern char g_last_error[];
  61 void * g_prefix;
  62
  63 char * get_git_last_error()
  64 {
  65         return g_last_error;
  66 }
  67
  68 extern void die_dll(const char *err, va_list params);
  69
  70 void dll_entry()
  71 {
  72         set_die_routine(die_dll);
  73 }
  74
  75 int git_get_sha1(const char *name, GIT_HASH sha1)
  76 {
  77         return get_sha1(name,sha1);
  78 }
  79
  80 static int convert_slash(char * path)
  81 {
  82         while(*path)
  83         {
  84                 if(*path == '\\' )
  85                         *path = '/';
  86                 path++;
  87         }
  88         return 0;
  89 }
  90
  91 int git_init()
  92 {
  93         char path[MAX_PATH+1];
  94         char *prefix;
  95         int ret;
  96         size_t homesize;
  97
  98         _fmode = _O_BINARY;
  99         _setmode(_fileno(stdin), _O_BINARY);
 100         _setmode(_fileno(stdout), _O_BINARY);
 101         _setmode(_fileno(stderr), _O_BINARY);
 102
 103         // set HOME if not set already
 104         getenv_s(&homesize, NULL, 0, "HOME");
 105         if (!homesize)
 106         {
 107                 _wputenv_s(L"HOME", wget_windows_home_directory());
 108         }
 109         GetModuleFileName(NULL, path, MAX_PATH);
 110         convert_slash(path);
 111
 112         git_extract_argv0_path(path);
 113         g_prefix = prefix = setup_git_directory();
 114         ret = git_config(git_default_config, NULL);
 115
 116         if (!homesize)
 117         {
 118                 _putenv_s("HOME","");/* clear home evironment to avoid affact third part software*/
 119         }
 120
 121         return ret;
 122 }
 123
 124 static int git_parse_commit_author(struct GIT_COMMIT_AUTHOR *author, char *pbuff)
 125 {
 126         char *end;
 127
 128         author->Name=pbuff;
 129         end=strchr(pbuff,'<');
 130         if( end == 0)
 131         {
 132                 return -1;
 133         }
 134         author->NameSize = end - pbuff - 1;
 135
 136         pbuff = end +1;
 137         end = strchr(pbuff, '>');
 138         if( end == 0)
 139                 return -1;
 140
 141         author->Email = pbuff ;
 142         author->EmailSize = end - pbuff;
 143
 144         pbuff = end + 2;
 145
 146         author->Date = atol(pbuff);
 147         end =  strchr(pbuff, ' ');
 148         if( end == 0 )
 149                 return -1;
 150
 151         pbuff=end;
 152         author->TimeZone = atol(pbuff);
 153
 154         return 0;
 155 }
 156
 157 int git_parse_commit(GIT_COMMIT *commit)
 158 {
 159         int ret = 0;
 160         char *pbuf;
 161         char *end;
 162         struct commit *p;
 163
 164         p= (struct commit *)commit->m_pGitCommit;
 165
 166         memcpy(commit->m_hash,p->object.sha1,GIT_HASH_SIZE);
 167
 168         commit->m_Encode = NULL;
 169         commit->m_EncodeSize = 0;
 170
 171         if(p->buffer == NULL)
 172                 return -1;
 173
 174         pbuf = p->buffer;
 175         while(pbuf)
 176         {
 177                 if (strncmp(pbuf, "author", 6) == 0)
 178                 {
 179                         ret = git_parse_commit_author(&commit->m_Author,pbuf + 7);
 180                         if(ret)
 181                                 return ret;
 182                 }
 183                 else if (strncmp(pbuf, "committer", 9) == 0)
 184                 {
 185                         ret =  git_parse_commit_author(&commit->m_Committer,pbuf + 10);
 186                         if(ret)
 187                                 return ret;
 188
 189                         pbuf = strchr(pbuf,'\n');
 190                         if(pbuf == NULL)
 191                                 return -1;
 192                 }
 193                 else if (strncmp(pbuf, "encoding", 8) == 0)
 194                 {
 195                         pbuf += 9;
 196                         commit->m_Encode=pbuf;
 197                         end = strchr(pbuf,'\n');
 198                         commit->m_EncodeSize=end -pbuf;
 199                 }
 200
 201                 // the headers end after the first empty line
 202                 else if (*pbuf == '\n')
 203                 {
 204                         pbuf++;
 205
 206                         commit->m_Subject=pbuf;
 207                         end = strchr(pbuf,'\n');
 208                         if( end == 0)
 209                                 commit->m_SubjectSize = strlen(pbuf);
 210                         else
 211                         {
 212                                 commit->m_SubjectSize = end - pbuf;
 213                                 pbuf = end +1;
 214                                 commit->m_Body = pbuf;
 215                                 commit->m_BodySize = strlen(pbuf);
 216                                 return 0;
 217                         }
 218                 }
 219
 220                 pbuf = strchr(pbuf,'\n');
 221                 if(pbuf)
 222                         pbuf ++;
 223         }
 224         return 0;
 225 }
 226
 227 int git_get_commit_from_hash(GIT_COMMIT *commit, GIT_HASH hash)
 228 {
 229         int ret = 0;
 230
 231         struct commit *p;
 232
 233         memset(commit,0,sizeof(GIT_COMMIT));
 234
 235         commit->m_pGitCommit = p = lookup_commit(hash);
 236
 237         if(commit == NULL)
 238                 return -1;
 239
 240         if(p == NULL)
 241                 return -1;
 242
 243         ret = parse_commit(p);
 244         if( ret )
 245                 return ret;
 246
 247         return git_parse_commit(commit);
 248 }
 249
 250 int git_get_commit_first_parent(GIT_COMMIT *commit,GIT_COMMIT_LIST *list)
 251 {
 252         struct commit *p = commit->m_pGitCommit;
 253
 254         if(list == NULL)
 255                 return -1;
 256
 257         *list = (GIT_COMMIT_LIST*)p->parents;
 258         return 0;
 259 }
 260 int git_get_commit_next_parent(GIT_COMMIT_LIST *list, GIT_HASH hash)
 261 {
 262         struct commit_list *l = *(struct commit_list **)list;
 263         if(list == NULL || l==NULL)
 264                 return -1;
 265
 266         if(hash)
 267                 memcpy(hash, l->item->object.sha1, GIT_HASH_SIZE);
 268
 269         *list = (GIT_COMMIT_LIST *)l->next;
 270         return 0;
 271
 272 }
 273
 274
 275 int git_free_commit(GIT_COMMIT *commit)
 276 {
 277         struct commit *p = commit->m_pGitCommit;
 278
 279         if( p->parents)
 280                 free_commit_list(p->parents);
 281
 282         if( p->buffer )
 283         {
 284                 free(p->buffer);
 285                 p->buffer=NULL;
 286                 p->object.parsed=0;
 287                 p->parents=0;
 288                 p->tree=0;
 289         }
 290         memset(commit,0,sizeof(GIT_COMMIT));
 291         return 0;
 292 }
 293
 294 char **strtoargv(char *arg, int *size)
 295 {
 296         int count=0;
 297         char *p=arg;
 298         char **argv;
 299
 300         int i=0;
 301         while(*p)
 302         {
 303                 if(*p == '\\')
 304                         *p='/';
 305                 p++;
 306         }
 307         p=arg;
 308
 309         while(*p)
 310         {
 311                 if(*p == ' ')
 312                         count ++;
 313                 p++;
 314         }
 315
 316         argv=malloc(strlen(arg)+1 + (count +2)*sizeof(void*));
 317         p=(char*)(argv+count+2);
 318
 319         while(*arg)
 320         {
 321                 if(*arg != ' ')
 322                 {
 323                         char space=' ';
 324                         argv[i]=p;
 325
 326                         while(*arg)
 327                         {
 328                                 if(*arg == '"')
 329                                 {
 330                                         arg++;
 331                                         if(space == ' ')
 332                                                 space = '"';
 333                                         else
 334                                                 space = ' ';
 335                                 }
 336                                 if((*arg == space) || (*arg == 0))
 337                                         break;
 338
 339                                 *p++ = *arg++;
 340                         }
 341                         i++;
 342                         *p++=0;
 343                 }
 344                 if(*arg == 0)
 345                         break;
 346                 arg++;
 347         }
 348         argv[i]=NULL;
 349         *size = i;
 350         return argv;
 351 }
 352 int git_open_log(GIT_LOG * handle, char * arg)
 353 {
 354         struct rev_info *p_Rev;
 355         char ** argv=0;
 356         int argc=0;
 357         unsigned int i=0;
 358         struct setup_revision_opt opt;
 359
 360         /* clear flags */
 361         unsigned int obj_size = get_max_object_index();
 362         for(i =0; i<obj_size; i++)
 363         {
 364                 struct object *ob= get_indexed_object(i);
 365                 if(ob)
 366                         ob->flags=0;
 367         }
 368
 369         if(arg != NULL)
 370                 argv = strtoargv(arg,&argc);
 371
 372         p_Rev = malloc(sizeof(struct rev_info));
 373         memset(p_Rev,0,sizeof(struct rev_info));
 374
 375         if(p_Rev == NULL)
 376                 return -1;
 377
 378         init_revisions(p_Rev, g_prefix);
 379         p_Rev->diff = 1;
 380
 381         memset(&opt, 0, sizeof(opt));
 382         opt.def = "HEAD";
 383
 384         cmd_log_init(argc, argv, g_prefix,p_Rev,&opt);
 385
 386         p_Rev->pPrivate = argv;
 387         *handle = p_Rev;
 388         return 0;
 389
 390 }
 391 int git_get_log_firstcommit(GIT_LOG handle)
 392 {
 393         return prepare_revision_walk(handle);
 394 }
 395
 396 int git_get_log_estimate_commit_count(GIT_LOG handle)
 397 {
 398         struct rev_info *p_Rev;
 399         p_Rev=(struct rev_info *)handle;
 400
 401         return estimate_commit_count(p_Rev, p_Rev->commits);
 402 }
 403
 404 int git_get_log_nextcommit(GIT_LOG handle, GIT_COMMIT *commit, int follow)
 405 {
 406         int ret =0;
 407
 408         if(commit == NULL)
 409                 return -1;
 410
 411         memset(commit, 0, sizeof(GIT_COMMIT));
 412
 413         commit->m_pGitCommit = get_revision(handle);
 414         if( commit->m_pGitCommit == NULL)
 415                 return -2;
 416
 417         if (follow && !log_tree_commit(handle, commit->m_pGitCommit))
 418         {
 419                 commit->m_ignore = 1;
 420                 return 0;
 421         }
 422         commit->m_ignore = 0;
 423
 424         ret=git_parse_commit(commit);
 425         if(ret)
 426                 return ret;
 427
 428         return 0;
 429 }
 430
 431 struct notes_tree **display_notes_trees;
 432 int git_close_log(GIT_LOG handle)
 433 {
 434         if(handle)
 435         {
 436                 struct rev_info *p_Rev;
 437                 p_Rev=(struct rev_info *)handle;
 438                 if(p_Rev->pPrivate)
 439                         free(p_Rev->pPrivate);
 440                 free(handle);
 441         }
 442         free_all_pack();
 443
 444         free_notes(*display_notes_trees);
 445         display_notes_trees = 0;
 446         return 0;
 447 }
 448
 449 int git_open_diff(GIT_DIFF *diff, char * arg)
 450 {
 451         struct rev_info *p_Rev;
 452         char ** argv=0;
 453         int argc=0;
 454
 455         if(arg != NULL)
 456                 argv = strtoargv(arg,&argc);
 457
 458         p_Rev = malloc(sizeof(struct rev_info));
 459         memset(p_Rev,0,sizeof(struct rev_info));
 460
 461         p_Rev->pPrivate = argv;
 462         *diff = (GIT_DIFF)p_Rev;
 463
 464         init_revisions(p_Rev, g_prefix);
 465         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 466         p_Rev->abbrev = 0;
 467         p_Rev->diff = 1;
 468         argc = setup_revisions(argc, argv, p_Rev, NULL);
 469
 470         return 0;
 471 }
 472 int git_close_diff(GIT_DIFF handle)
 473 {
 474         git_diff_flush(handle);
 475         if(handle)
 476         {
 477                 struct rev_info *p_Rev;
 478                 p_Rev=(struct rev_info *)handle;
 479                 if(p_Rev->pPrivate)
 480                         free(p_Rev->pPrivate);
 481                 free(handle);
 482         }
 483         return 0;
 484 }
 485 int git_diff_flush(GIT_DIFF diff)
 486 {
 487         struct diff_queue_struct *q = &diff_queued_diff;
 488         struct rev_info *p_Rev;
 489         int i;
 490         p_Rev = (struct rev_info *)diff;
 491
 492         if(q->nr == 0)
 493                 return 0;
 494
 495         for (i = 0; i < q->nr; i++)
 496                 diff_free_filepair(q->queue[i]);
 497
 498         if(q->queue)
 499         {
 500                 free(q->queue);
 501                 q->queue = NULL;
 502                 q->nr = q->alloc = 0;
 503         }
 504
 505         if (p_Rev->diffopt.close_file)
 506                 fclose(p_Rev->diffopt.file);
 507
 508         free_diffstat_info(&p_Rev->diffstat);
 509         return 0;
 510 }
 511
 512 int git_root_diff(GIT_DIFF diff, GIT_HASH hash,GIT_FILE *file, int *count, int isstat)
 513 {
 514         int ret;
 515         struct rev_info *p_Rev;
 516         int i;
 517         struct diff_queue_struct *q = &diff_queued_diff;
 518
 519         p_Rev = (struct rev_info *)diff;
 520
 521         ret=diff_root_tree_sha1(hash, "", &p_Rev->diffopt);
 522
 523         if(ret)
 524                 return ret;
 525
 526         if(isstat)
 527         {
 528                 diffcore_std(&p_Rev->diffopt);
 529
 530                 memset(&p_Rev->diffstat, 0, sizeof(struct diffstat_t));
 531                 for (i = 0; i < q->nr; i++) {
 532                         struct diff_filepair *p = q->queue[i];
 533                         //if (check_pair_status(p))
 534                         diff_flush_stat(p, &p_Rev->diffopt, &p_Rev->diffstat);
 535                 }
 536
 537                 if(file)
 538                         *file = q;
 539                 if(count)
 540                         *count = q->nr;
 541         }
 542         return 0;
 543 }
 544
 545 int git_diff(GIT_DIFF diff, GIT_HASH hash1, GIT_HASH hash2, GIT_FILE * file, int *count,int isstat)
 546 {
 547         struct rev_info *p_Rev;
 548         int ret;
 549         int i;
 550         struct diff_queue_struct *q = &diff_queued_diff;
 551
 552         p_Rev = (struct rev_info *)diff;
 553
 554         ret = diff_tree_sha1(hash1,hash2,"",&p_Rev->diffopt);
 555         if( ret )
 556         {
 557                 free_all_pack();
 558                 return ret;
 559         }
 560
 561         if(isstat)
 562         {
 563                 diffcore_std(&p_Rev->diffopt);
 564                 memset(&p_Rev->diffstat, 0, sizeof(struct diffstat_t));
 565                 for (i = 0; i < q->nr; i++) {
 566                         struct diff_filepair *p = q->queue[i];
 567                         //if (check_pair_status(p))
 568                         diff_flush_stat(p, &p_Rev->diffopt, &p_Rev->diffstat);
 569                 }
 570         }
 571         free_all_pack();
 572         if(file)
 573                 *file = q;
 574         if(count)
 575                 *count = q->nr;
 576         return 0;
 577 }
 578
 579 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)
 580 {
 581         struct diff_queue_struct *q = &diff_queued_diff;
 582         struct rev_info *p_Rev;
 583         p_Rev = (struct rev_info *)diff;
 584
 585         q = (struct diff_queue_struct *)file;
 586         if(file == 0)
 587                 return -1;
 588         if(i>=q->nr)
 589                 return -1;
 590
 591         if(newname)
 592                 *newname = q->queue[i]->two->path;
 593
 594         if(oldname)
 595                 *oldname = q->queue[i]->one->path;
 596
 597         if(status)
 598                 *status = q->queue[i]->status;
 599
 600         if(p_Rev->diffstat.files)
 601         {
 602                 int j;
 603                 for(j=0;j<p_Rev->diffstat.nr;j++)
 604                 {
 605                         if(strcmp(*newname,p_Rev->diffstat.files[j]->name)==0)
 606                                 break;
 607                 }
 608                 if( j== p_Rev->diffstat.nr)
 609                 {
 610                         *IsBin=1;
 611                         *inc=0;
 612                         *dec=0;
 613                         return 0;
 614                 }
 615                 if(IsBin)
 616                         *IsBin = p_Rev->diffstat.files[j]->is_binary;
 617                 if(inc)
 618                         *inc = p_Rev->diffstat.files[j]->added;
 619                 if(dec)
 620                         *dec = p_Rev->diffstat.files[j]->deleted;
 621         }else
 622         {
 623                 *IsBin=1;
 624                 *inc=0;
 625                 *dec=0;
 626         }
 627
 628         return 0;
 629 }
 630
 631 int git_read_tree(GIT_HASH hash,read_tree_fn_t fn, void *context)
 632 {
 633         struct tree * root;
 634         int ret;
 635         reprepare_packed_git();
 636         root = parse_tree_indirect(hash);
 637
 638         if (!root)
 639         {
 640                 free_all_pack();
 641                 return -1;
 642         }
 643         ret = read_tree_recursive(root,NULL,NULL,0,NULL,fn,context);
 644         free_all_pack();
 645         return ret;
 646 }
 647
 648 int git_add_exclude(const char *string, const char *base,
 649                                         int baselen, struct exclude_list *which)
 650 {
 651         add_exclude(string, base, baselen, which);
 652         return 0;
 653 }
 654
 655 int git_create_exclude_list(EXCLUDE_LIST *which)
 656 {
 657         *which = malloc(sizeof(struct exclude_list));
 658         memset(*which,0,sizeof(struct exclude_list));
 659         return 0;
 660 }
 661
 662 int git_free_exclude_list(EXCLUDE_LIST which)
 663 {
 664         int i=0;
 665         struct exclude_list *p = (struct exclude_list *) which;
 666
 667         for(i=0; i<p->nr;i++)
 668         {
 669                 free(p->excludes[i]);
 670         }
 671         free(p->excludes);
 672         free(p);
 673         return 0;
 674 }
 675
 676 int git_check_excluded_1(const char *pathname,
 677                                                         int pathlen, const char *basename, int *dtype,
 678                                                         EXCLUDE_LIST el)
 679 {
 680         return excluded_from_list(pathname, pathlen, basename,dtype,el);
 681 }
 682
 683 int git_get_notes(GIT_HASH hash, char **p_note)
 684 {
 685         struct strbuf sb;
 686         size_t size;
 687         strbuf_init(&sb,0);
 688         format_display_notes(hash, &sb, "utf-8", 0);
 689         *p_note = strbuf_detach(&sb,&size);
 690
 691         return 0;
 692 }
 693
 694 struct cmd_struct {
 695         const char *cmd;
 696         int (*fn)(int, const char **, const char *);
 697         int option;
 698 };
 699
 700 #define RUN_SETUP       (1<<0)
 701 #define USE_PAGER       (1<<1)
 702 /*
 703  * require working tree to be present -- anything uses this needs
 704  * RUN_SETUP for reading from the configuration file.
 705  */
 706 #define NEED_WORK_TREE  (1<<2)
 707
 708 const char git_usage_string[] =
 709         "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
 710         "           [-p|--paginate|--no-pager] [--no-replace-objects]\n"
 711         "           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
 712         "           [-c name=value] [--help]\n"
 713         "           COMMAND [ARGS]";
 714
 715 const char git_more_info_string[] =
 716         "See 'git help COMMAND' for more information on a specific command.";
 717
 718 /* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
 719 int check_pager_config(const char *cmd)
 720 {
 721         return 0;
 722 }
 723
 724
 725 int git_run_cmd(char *cmd, char *arg)
 726 {
 727
 728         int i=0;
 729         char ** argv=0;
 730         int argc=0;
 731
 732 static struct cmd_struct commands[] = {
 733                 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 734                 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 735                 { "annotate", cmd_annotate, RUN_SETUP },
 736                 { "apply", cmd_apply },
 737                 { "archive", cmd_archive },
 738                 { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
 739                 { "blame", cmd_blame, RUN_SETUP },
 740                 { "branch", cmd_branch, RUN_SETUP },
 741                 { "bundle", cmd_bundle },
 742                 { "cat-file", cmd_cat_file, RUN_SETUP },
 743                 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
 744                 { "checkout-index", cmd_checkout_index,
 745                         RUN_SETUP | NEED_WORK_TREE},
 746                 { "check-ref-format", cmd_check_ref_format },
 747                 { "check-attr", cmd_check_attr, RUN_SETUP },
 748                 { "cherry", cmd_cherry, RUN_SETUP },
 749                 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
 750                 { "clone", cmd_clone },
 751                 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
 752                 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
 753                 { "commit-tree", cmd_commit_tree, RUN_SETUP },
 754                 { "config", cmd_config },
 755                 { "count-objects", cmd_count_objects, RUN_SETUP },
 756                 { "describe", cmd_describe, RUN_SETUP },
 757                 { "diff", cmd_diff },
 758                 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
 759                 { "diff-index", cmd_diff_index, RUN_SETUP },
 760                 { "diff-tree", cmd_diff_tree, RUN_SETUP },
 761                 { "fast-export", cmd_fast_export, RUN_SETUP },
 762                 { "fetch", cmd_fetch, RUN_SETUP },
 763                 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
 764                 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
 765                 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
 766                 { "format-patch", cmd_format_patch, RUN_SETUP },
 767                 { "fsck", cmd_fsck, RUN_SETUP },
 768                 { "fsck-objects", cmd_fsck, RUN_SETUP },
 769                 { "gc", cmd_gc, RUN_SETUP },
 770                 { "get-tar-commit-id", cmd_get_tar_commit_id },
 771                 { "grep", cmd_grep },
 772                 { "hash-object", cmd_hash_object },
 773                 { "help", cmd_help },
 774                 { "index-pack", cmd_index_pack },
 775                 { "init", cmd_init_db },
 776                 { "init-db", cmd_init_db },
 777                 { "log", cmd_log, RUN_SETUP },
 778                 { "ls-files", cmd_ls_files, RUN_SETUP },
 779                 { "ls-tree", cmd_ls_tree, RUN_SETUP },
 780                 { "ls-remote", cmd_ls_remote },
 781                 { "mailinfo", cmd_mailinfo },
 782                 { "mailsplit", cmd_mailsplit },
 783                 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
 784                 { "merge-base", cmd_merge_base, RUN_SETUP },
 785                 { "merge-file", cmd_merge_file },
 786                 { "merge-index", cmd_merge_index, RUN_SETUP },
 787                 { "merge-ours", cmd_merge_ours, RUN_SETUP },
 788                 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 789                 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 790                 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 791                 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 792                 { "merge-tree", cmd_merge_tree, RUN_SETUP },
 793                 { "mktag", cmd_mktag, RUN_SETUP },
 794                 { "mktree", cmd_mktree, RUN_SETUP },
 795                 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
 796                 { "name-rev", cmd_name_rev, RUN_SETUP },
 797                 { "notes", cmd_notes, RUN_SETUP },
 798                 { "pack-objects", cmd_pack_objects, RUN_SETUP },
 799                 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
 800                 { "patch-id", cmd_patch_id },
 801                 { "peek-remote", cmd_ls_remote },
 802                 { "pickaxe", cmd_blame, RUN_SETUP },
 803                 { "prune", cmd_prune, RUN_SETUP },
 804                 { "prune-packed", cmd_prune_packed, RUN_SETUP },
 805                 { "push", cmd_push, RUN_SETUP },
 806                 { "read-tree", cmd_read_tree, RUN_SETUP },
 807                 { "receive-pack", cmd_receive_pack },
 808                 { "reflog", cmd_reflog, RUN_SETUP },
 809                 { "remote", cmd_remote, RUN_SETUP },
 810                 { "replace", cmd_replace, RUN_SETUP },
 811                 { "repo-config", cmd_config },
 812                 { "rerere", cmd_rerere, RUN_SETUP },
 813                 { "reset", cmd_reset, RUN_SETUP },
 814                 { "rev-list", cmd_rev_list, RUN_SETUP },
 815                 { "rev-parse", cmd_rev_parse },
 816                 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
 817                 { "rm", cmd_rm, RUN_SETUP },
 818                 { "send-pack", cmd_send_pack, RUN_SETUP },
 819                 { "shortlog", cmd_shortlog, USE_PAGER },
 820                 { "show-branch", cmd_show_branch, RUN_SETUP },
 821                 { "show", cmd_show, RUN_SETUP },
 822                 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
 823                 { "stripspace", cmd_stripspace },
 824                 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
 825                 { "tag", cmd_tag, RUN_SETUP },
 826                 { "tar-tree", cmd_tar_tree },
 827                 { "unpack-file", cmd_unpack_file, RUN_SETUP },
 828                 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
 829                 { "update-index", cmd_update_index, RUN_SETUP },
 830                 { "update-ref", cmd_update_ref, RUN_SETUP },
 831                 { "update-server-info", cmd_update_server_info, RUN_SETUP },
 832                 { "upload-archive", cmd_upload_archive },
 833                 { "var", cmd_var },
 834                 { "verify-tag", cmd_verify_tag, RUN_SETUP },
 835                 { "version", cmd_version },
 836                 { "whatchanged", cmd_whatchanged, RUN_SETUP },
 837                 { "write-tree", cmd_write_tree, RUN_SETUP },
 838                 { "verify-pack", cmd_verify_pack },
 839                 { "show-ref", cmd_show_ref, RUN_SETUP },
 840                 { "pack-refs", cmd_pack_refs, RUN_SETUP },
 841         };
 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
 913         ce = (struct cache_entry *)context;
 914
 915         if (S_ISDIR(mode))
 916                 return READ_TREE_RECURSIVE;
 917
 918         hashcpy(ce->sha1, sha1);
 919         memcpy(ce->name, base, baselen);
 920         memcpy(ce->name + baselen, pathname, strlen(pathname));
 921         ce->ce_flags = create_ce_flags(strlen(pathname)+baselen, 0);
 922         ce->ce_mode = create_ce_mode(mode);
 923
 924         return 0;
 925 }
 926
 927 int git_checkout_file(const char *ref, const char *path, const char *outputpath)
 928 {
 929         struct cache_entry *ce;
 930         int ret;
 931         GIT_HASH sha1;
 932         struct tree * root;
 933         struct checkout state;
 934         struct pathspec pathspec;
 935         const char *match[2];
 936         ret = get_sha1(ref, sha1);
 937         if(ret)
 938                 return ret;
 939
 940         reprepare_packed_git();
 941         root = parse_tree_indirect(sha1);
 942
 943         if(!root)
 944         {
 945                 free_all_pack();
 946                 return -1;
 947         }
 948
 949         ce = xcalloc(1, cache_entry_size(strlen(path)));
 950
 951         match[0] = path;
 952         match[1] = NULL;
 953
 954         init_pathspec(&pathspec, match);
 955         pathspec.items[0].use_wildcard = 0;
 956         ret = read_tree_recursive(root, "", 0, 0, &pathspec, update_some, ce);
 957         free_pathspec(&pathspec);
 958
 959         if(ret)
 960         {
 961                 free_all_pack();
 962                 free(ce);
 963                 return ret;
 964         }
 965         memset(&state, 0, sizeof(state));
 966         state.force = 1;
 967         state.refresh_cache = 0;
 968
 969         ret = write_entry(ce, outputpath, &state, 0);
 970         free_all_pack();
 971         free(ce);
 972         return ret;
 973 }
 974 struct config_buf
 975 {
 976         char *buf;
 977         char *key;
 978         char *size;
 979         int seen;
 980 };
 981
 982 static int get_config(const char *key_, const char *value_, void *cb)
 983 {
 984         struct config_buf *buf;
 985         buf=(struct config_buf*)cb;
 986         if(strcmp(key_, buf->key))
 987                 return 0;
 988
 989         if (value_)
 990                 strncpy(buf->buf,value_,buf->size);
 991         else
 992         {
 993                 buf->buf[0] = 't';
 994                 buf->buf[1] = 'r';
 995                 buf->buf[2] = 'u';
 996                 buf->buf[3] = 'e';
 997                 buf->buf[4] = 0;
 998         }
 999         buf->seen = 1;
1000         return 0;
1001
1002 }
1003
1004 // wchar_t wrapper for git_etc_gitconfig()
1005 const wchar_t *wget_msysgit_etc(void)
1006 {
1007         static const wchar_t *etc_gitconfig = NULL;
1008         wchar_t wpointer[MAX_PATH];
1009
1010         if (etc_gitconfig)
1011                 return etc_gitconfig;
1012
1013         if (xutftowcs_path(wpointer, git_etc_gitconfig()) < 0)
1014                 return NULL;
1015
1016         etc_gitconfig = _wcsdup(wpointer);
1017
1018         return etc_gitconfig;
1019 }
1020
1021 int git_get_config(const char *key, char *buffer, int size, char *git_path)
1022 {
1023         char *local, *global;
1024         const char *home, *system;
1025         struct config_buf buf;
1026         buf.buf=buffer;
1027         buf.size=size;
1028         buf.seen = 0;
1029         buf.key = key;
1030
1031         local=global=system=NULL;
1032
1033         home = get_windows_home_directory();
1034         if (home)
1035                 global = xstrdup(mkpath("%s/.gitconfig", home));
1036
1037         system = git_etc_gitconfig();
1038
1039         local = git_pathdup("config");
1040
1041         if ( !buf.seen)
1042                 git_config_from_file(get_config, local, &buf);
1043         if (!buf.seen && global)
1044                 git_config_from_file(get_config, global, &buf);
1045         if (!buf.seen && system)
1046                 git_config_from_file(get_config, system, &buf);
1047
1048         if(local)
1049                 free(local);
1050         if(global)
1051                 free(global);
1052
1053         return !buf.seen;
1054 }
1055
1056 // taken from msysgit: compat/mingw.c
1057 const char *get_windows_home_directory(void)
1058 {
1059         static const char *home_directory = NULL;
1060         struct strbuf buf = STRBUF_INIT;
1061
1062         if (home_directory)
1063                 return home_directory;
1064
1065         home_directory = getenv("HOME");
1066         if (home_directory && *home_directory)
1067                 return home_directory;
1068
1069         strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1070         home_directory = strbuf_detach(&buf, NULL);
1071
1072         return home_directory;
1073 }
1074
1075 // wchar_t wrapper for get_windows_home_directory()
1076 const wchar_t *wget_windows_home_directory(void)
1077 {
1078         static const wchar_t *home_directory = NULL;
1079         wchar_t wpointer[MAX_PATH];
1080
1081         if (home_directory)
1082                 return home_directory;
1083
1084         if (xutftowcs_path(wpointer, get_windows_home_directory()) < 0)
1085                 return NULL;
1086
1087         home_directory = _wcsdup(wpointer);
1088
1089         return home_directory;
1090 }
1091
1092 int get_set_config(const char *key, char *value, CONFIG_TYPE type,char *git_path)
1093 {
1094         char * config_exclusive_filename;
1095         switch(type)
1096         {
1097         case CONFIG_LOCAL:
1098                 config_exclusive_filename  = git_pathdup("config");
1099                 break;
1100         case CONFIG_GLOBAL:
1101                 {
1102                         const char *home = get_windows_home_directory();
1103                         if (home)
1104                         {
1105                                 config_exclusive_filename = xstrdup(mkpath("%s/.gitconfig", home));
1106                         }
1107                 }
1108                 break;
1109         default:
1110                 config_exclusive_filename = NULL;
1111                 break;
1112         }
1113
1114         if(!config_exclusive_filename)
1115                 return -1;
1116
1117         return git_config_set_multivar_in_file(config_exclusive_filename, key, value, NULL, 0);
1118 }