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