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 #pragma warning(push)
  25 #pragma warning(disable: 4100 4018 4127 4244 4267)
  26 #include "git-compat-util.h"
  27 #include "gitdll.h"
  28 #include "cache.h"
  29 #include "commit.h"
  30 #include "diff.h"
  31 #include "revision.h"
  32 #include "diffcore.h"
  33 #include "dir.h"
  34 #include "builtin.h"
  35 #include "exec_cmd.h"
  36 #include "cache.h"
  37 #include "quote.h"
  38 #include "run-command.h"
  39 #include "mailmap.h"
  40 #pragma warning(pop)
  41
  42 extern char g_last_error[];
  43 const char * g_prefix;
  44
  45 extern void die_dll(const char *err, va_list params);
  46 extern int die_is_recursing_dll(void);
  47
  48 extern void free_all_pack();
  49 extern void reset_git_env();
  50 extern void invalidate_ref_cache(const char* submodule);
  51 extern void cmd_log_init(int argc, const char** argv, const char* prefix, struct rev_info* rev, struct setup_revision_opt* opt);
  52 extern int estimate_commit_count(struct rev_info* rev, struct commit_list* list);
  53 extern int log_tree_commit(struct rev_info*, struct commit*);
  54 extern int write_entry(struct cache_entry* ce, char* path, const struct checkout* state, int to_tempfile);
  55 extern struct object* deref_tag(struct object* o, const char* warn, int warnlen);
  56 extern void diff_flush_stat(struct diff_filepair* p, struct diff_options* o, struct diffstat_t* diffstat);
  57 extern void free_diffstat_info(struct diffstat_t* diffstat);
  58 extern int for_each_reflog_ent(const char* refname, each_reflog_ent_fn fn, void* cb_data);
  59 extern int for_each_ref_in(const char* prefix, each_ref_fn fn, void* cb_data);
  60
  61 void dll_entry()
  62 {
  63         set_die_routine(die_dll);
  64         set_die_is_recursing_routine(die_is_recursing_dll);
  65 }
  66
  67 int git_get_sha1(const char *name, GIT_HASH sha1)
  68 {
  69         return get_sha1(name,sha1);
  70 }
  71
  72 static int convert_slash(char * path)
  73 {
  74         while(*path)
  75         {
  76                 if(*path == '\\' )
  77                         *path = '/';
  78                 path++;
  79         }
  80         return 0;
  81 }
  82
  83 int git_init()
  84 {
  85         char path[MAX_PATH+1];
  86         int ret;
  87         size_t homesize;
  88
  89         _fmode = _O_BINARY;
  90         _setmode(_fileno(stdin), _O_BINARY);
  91         _setmode(_fileno(stdout), _O_BINARY);
  92         _setmode(_fileno(stderr), _O_BINARY);
  93
  94         // set HOME if not set already
  95         getenv_s(&homesize, NULL, 0, "HOME");
  96         if (!homesize)
  97         {
  98                 _wputenv_s(L"HOME", wget_windows_home_directory());
  99         }
 100         GetModuleFileName(NULL, path, MAX_PATH);
 101         convert_slash(path);
 102
 103         git_extract_argv0_path(path);
 104         reset_git_env();
 105         g_prefix = setup_git_directory();
 106         ret = git_config(git_default_config, NULL);
 107
 108         if (!homesize)
 109         {
 110                 _putenv_s("HOME","");/* clear home evironment to avoid affact third part software*/
 111         }
 112
 113         return ret;
 114 }
 115
 116 static int git_parse_commit_author(struct GIT_COMMIT_AUTHOR *author, char *pbuff)
 117 {
 118         char *end;
 119
 120         author->Name=pbuff;
 121         end=strchr(pbuff,'<');
 122         if( end == 0)
 123         {
 124                 return -1;
 125         }
 126         author->NameSize = (int)(end - pbuff - 1);
 127
 128         pbuff = end +1;
 129         end = strchr(pbuff, '>');
 130         if( end == 0)
 131                 return -1;
 132
 133         author->Email = pbuff ;
 134         author->EmailSize = (int)(end - pbuff);
 135
 136         pbuff = end + 2;
 137
 138         author->Date = atol(pbuff);
 139         end =  strchr(pbuff, ' ');
 140         if( end == 0 )
 141                 return -1;
 142
 143         pbuff=end;
 144         author->TimeZone = atol(pbuff);
 145
 146         return 0;
 147 }
 148
 149 int git_parse_commit(GIT_COMMIT *commit)
 150 {
 151         int ret = 0;
 152         char *pbuf;
 153         char *end;
 154         struct commit *p;
 155
 156         p= (struct commit *)commit->m_pGitCommit;
 157
 158         memcpy(commit->m_hash,p->object.sha1,GIT_HASH_SIZE);
 159
 160         commit->m_Encode = NULL;
 161         commit->m_EncodeSize = 0;
 162
 163         if(p->buffer == NULL)
 164                 return -3;
 165
 166         pbuf = p->buffer;
 167         while(pbuf)
 168         {
 169                 if (strncmp(pbuf, "author", 6) == 0)
 170                 {
 171                         ret = git_parse_commit_author(&commit->m_Author,pbuf + 7);
 172                         if(ret)
 173                                 return -4;
 174                 }
 175                 else if (strncmp(pbuf, "committer", 9) == 0)
 176                 {
 177                         ret =  git_parse_commit_author(&commit->m_Committer,pbuf + 10);
 178                         if(ret)
 179                                 return -5;
 180
 181                         pbuf = strchr(pbuf,'\n');
 182                         if(pbuf == NULL)
 183                                 return -6;
 184                 }
 185                 else if (strncmp(pbuf, "encoding", 8) == 0)
 186                 {
 187                         pbuf += 9;
 188                         commit->m_Encode=pbuf;
 189                         end = strchr(pbuf,'\n');
 190                         commit->m_EncodeSize= (int)(end -pbuf);
 191                 }
 192
 193                 // the headers end after the first empty line
 194                 else if (*pbuf == '\n')
 195                 {
 196                         pbuf++;
 197
 198                         commit->m_Subject=pbuf;
 199                         end = strchr(pbuf,'\n');
 200                         if( end == 0)
 201                                 commit->m_SubjectSize = (int)strlen(pbuf);
 202                         else
 203                         {
 204                                 commit->m_SubjectSize = (int)(end - pbuf);
 205                                 pbuf = end +1;
 206                                 commit->m_Body = pbuf;
 207                                 commit->m_BodySize = (int)strlen(pbuf);
 208                                 return 0;
 209                         }
 210                 }
 211
 212                 pbuf = strchr(pbuf,'\n');
 213                 if(pbuf)
 214                         pbuf ++;
 215         }
 216         return 0;
 217 }
 218
 219 int git_get_commit_from_hash(GIT_COMMIT *commit, GIT_HASH hash)
 220 {
 221         int ret = 0;
 222
 223         struct commit *p;
 224
 225         if (commit == NULL)
 226                 return -1;
 227
 228         memset(commit,0,sizeof(GIT_COMMIT));
 229
 230         commit->m_pGitCommit = p = lookup_commit(hash);
 231
 232         if(p == NULL)
 233                 return -1;
 234
 235         ret = parse_commit(p);
 236         if( ret )
 237                 return ret;
 238
 239         return git_parse_commit(commit);
 240 }
 241
 242 int git_get_commit_first_parent(GIT_COMMIT *commit,GIT_COMMIT_LIST *list)
 243 {
 244         struct commit *p = commit->m_pGitCommit;
 245
 246         if(list == NULL)
 247                 return -1;
 248
 249         *list = (GIT_COMMIT_LIST*)p->parents;
 250         return 0;
 251 }
 252 int git_get_commit_next_parent(GIT_COMMIT_LIST *list, GIT_HASH hash)
 253 {
 254         struct commit_list *l;
 255         if (list == NULL)
 256                 return -1;
 257
 258         l = *(struct commit_list **)list;
 259         if (l == NULL)
 260                 return -1;
 261
 262         if(hash)
 263                 memcpy(hash, l->item->object.sha1, GIT_HASH_SIZE);
 264
 265         *list = (GIT_COMMIT_LIST *)l->next;
 266         return 0;
 267
 268 }
 269
 270
 271 int git_free_commit(GIT_COMMIT *commit)
 272 {
 273         struct commit *p = commit->m_pGitCommit;
 274
 275         if( p->parents)
 276                 free_commit_list(p->parents);
 277
 278         if( p->buffer )
 279         {
 280                 free(p->buffer);
 281                 p->buffer=NULL;
 282                 p->object.parsed=0;
 283                 p->parents=0;
 284                 p->tree=0;
 285         }
 286         memset(commit,0,sizeof(GIT_COMMIT));
 287         return 0;
 288 }
 289
 290 char **strtoargv(char *arg, int *size)
 291 {
 292         int count=0;
 293         char *p=arg;
 294         char **argv;
 295
 296         int i=0;
 297         while(*p)
 298         {
 299                 if(*p == '\\')
 300                         *p='/';
 301                 p++;
 302         }
 303         p=arg;
 304
 305         while(*p)
 306         {
 307                 if(*p == ' ')
 308                         count ++;
 309                 p++;
 310         }
 311
 312         argv=malloc(strlen(arg)+1 + (count +2)*sizeof(void*));
 313         p=(char*)(argv+count+2);
 314
 315         while(*arg)
 316         {
 317                 if(*arg != ' ')
 318                 {
 319                         char space=' ';
 320                         argv[i]=p;
 321
 322                         while(*arg)
 323                         {
 324                                 if(*arg == '"')
 325                                 {
 326                                         arg++;
 327                                         if(space == ' ')
 328                                                 space = '"';
 329                                         else
 330                                                 space = ' ';
 331                                 }
 332                                 if((*arg == space) || (*arg == 0))
 333                                         break;
 334
 335                                 *p++ = *arg++;
 336                         }
 337                         i++;
 338                         *p++=0;
 339                 }
 340                 if(*arg == 0)
 341                         break;
 342                 arg++;
 343         }
 344         argv[i]=NULL;
 345         *size = i;
 346         return argv;
 347 }
 348 int git_open_log(GIT_LOG * handle, char * arg)
 349 {
 350         struct rev_info *p_Rev;
 351         char ** argv=0;
 352         int argc=0;
 353         unsigned int i=0;
 354         struct setup_revision_opt opt;
 355
 356         /* clear flags */
 357         unsigned int obj_size = get_max_object_index();
 358         for(i =0; i<obj_size; i++)
 359         {
 360                 struct object *ob= get_indexed_object(i);
 361                 if(ob)
 362                         ob->flags=0;
 363         }
 364
 365         if(arg != NULL)
 366                 argv = strtoargv(arg,&argc);
 367
 368         if (!argv)
 369                 return -1;
 370
 371         p_Rev = malloc(sizeof(struct rev_info));
 372         if (p_Rev == NULL)
 373         {
 374                 free(argv);
 375                 return -1;
 376         }
 377
 378         memset(p_Rev,0,sizeof(struct rev_info));
 379
 380         invalidate_ref_cache(NULL);
 381
 382         init_revisions(p_Rev, g_prefix);
 383         p_Rev->diff = 1;
 384
 385         memset(&opt, 0, sizeof(opt));
 386         opt.def = "HEAD";
 387
 388         cmd_log_init(argc, argv, g_prefix,p_Rev,&opt);
 389
 390         p_Rev->pPrivate = argv;
 391         *handle = p_Rev;
 392         return 0;
 393
 394 }
 395 int git_get_log_firstcommit(GIT_LOG handle)
 396 {
 397         return prepare_revision_walk(handle);
 398 }
 399
 400 int git_get_log_estimate_commit_count(GIT_LOG handle)
 401 {
 402         struct rev_info *p_Rev;
 403         p_Rev=(struct rev_info *)handle;
 404
 405         return estimate_commit_count(p_Rev, p_Rev->commits);
 406 }
 407
 408 int git_get_log_nextcommit(GIT_LOG handle, GIT_COMMIT *commit, int follow)
 409 {
 410         int ret =0;
 411
 412         if(commit == NULL)
 413                 return -1;
 414
 415         memset(commit, 0, sizeof(GIT_COMMIT));
 416
 417         commit->m_pGitCommit = get_revision(handle);
 418         if( commit->m_pGitCommit == NULL)
 419                 return -2;
 420
 421         if (follow && !log_tree_commit(handle, commit->m_pGitCommit))
 422         {
 423                 commit->m_ignore = 1;
 424                 return 0;
 425         }
 426         commit->m_ignore = 0;
 427
 428         ret=git_parse_commit(commit);
 429         if(ret)
 430                 return ret;
 431
 432         return 0;
 433 }
 434
 435 struct notes_tree **display_notes_trees;
 436 int git_close_log(GIT_LOG handle)
 437 {
 438         if(handle)
 439         {
 440                 struct rev_info *p_Rev;
 441                 p_Rev=(struct rev_info *)handle;
 442                 if(p_Rev->pPrivate)
 443                         free(p_Rev->pPrivate);
 444                 free(handle);
 445         }
 446         free_all_pack();
 447
 448         if (display_notes_trees)
 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_do_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         assert(newname && oldname && status);
 597
 598         *newname = q->queue[i]->two->path;
 599         *oldname = q->queue[i]->one->path;
 600         *status = q->queue[i]->status;
 601
 602         if(p_Rev->diffstat.files)
 603         {
 604                 int j;
 605                 for(j=0;j<p_Rev->diffstat.nr;j++)
 606                 {
 607                         if(strcmp(*newname,p_Rev->diffstat.files[j]->name)==0)
 608                                 break;
 609                 }
 610                 if( j== p_Rev->diffstat.nr)
 611                 {
 612                         *IsBin=1;
 613                         *inc=0;
 614                         *dec=0;
 615                         return 0;
 616                 }
 617                 if(IsBin)
 618                         *IsBin = p_Rev->diffstat.files[j]->is_binary;
 619                 if(inc)
 620                         *inc = (int)p_Rev->diffstat.files[j]->added;
 621                 if(dec)
 622                         *dec = (int)p_Rev->diffstat.files[j]->deleted;
 623         }else
 624         {
 625                 *IsBin=1;
 626                 *inc=0;
 627                 *dec=0;
 628         }
 629
 630         return 0;
 631 }
 632
 633 int git_read_tree(GIT_HASH hash,read_tree_fn_t fn, void *context)
 634 {
 635         struct tree * root;
 636         int ret;
 637         reprepare_packed_git();
 638         root = parse_tree_indirect(hash);
 639
 640         if (!root)
 641         {
 642                 free_all_pack();
 643                 return -1;
 644         }
 645         ret = read_tree_recursive(root, NULL, 0, 0, NULL, fn, context);
 646         free_all_pack();
 647         return ret;
 648 }
 649
 650 int git_add_exclude(const char *string, const char *base,
 651                                         int baselen, struct exclude_list *which, int lineno)
 652 {
 653         add_exclude(string, base, baselen, which, lineno);
 654         return 0;
 655 }
 656
 657 int git_create_exclude_list(EXCLUDE_LIST *which)
 658 {
 659         *which = malloc(sizeof(struct exclude_list));
 660         memset(*which,0,sizeof(struct exclude_list));
 661         return 0;
 662 }
 663
 664 int git_free_exclude_list(EXCLUDE_LIST which)
 665 {
 666         int i=0;
 667         struct exclude_list *p = (struct exclude_list *) which;
 668
 669         for(i=0; i<p->nr;i++)
 670         {
 671                 free(p->excludes[i]);
 672         }
 673         free(p->excludes);
 674         free(p);
 675         return 0;
 676 }
 677
 678 int git_check_excluded_1(const char *pathname,
 679                                                         int pathlen, const char *basename, int *dtype,
 680                                                         EXCLUDE_LIST el)
 681 {
 682         return is_excluded_from_list(pathname, pathlen, basename, dtype, el);
 683 }
 684
 685 int git_get_notes(GIT_HASH hash, char **p_note)
 686 {
 687         struct strbuf sb;
 688         size_t size;
 689         strbuf_init(&sb,0);
 690         format_display_notes(hash, &sb, "utf-8", 1);
 691         *p_note = strbuf_detach(&sb,&size);
 692
 693         return 0;
 694 }
 695
 696 struct cmd_struct {
 697         const char *cmd;
 698         int (*fn)(int, const char **, const char *);
 699         int option;
 700 };
 701
 702 #define RUN_SETUP       (1<<0)
 703 #define USE_PAGER       (1<<1)
 704 /*
 705  * require working tree to be present -- anything uses this needs
 706  * RUN_SETUP for reading from the configuration file.
 707  */
 708 #define NEED_WORK_TREE  (1<<2)
 709
 710 const char git_usage_string[] =
 711         "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
 712         "           [-p|--paginate|--no-pager] [--no-replace-objects]\n"
 713         "           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
 714         "           [-c name=value] [--help]\n"
 715         "           COMMAND [ARGS]";
 716
 717 const char git_more_info_string[] =
 718         "See 'git help COMMAND' for more information on a specific command.";
 719
 720 static struct cmd_struct commands[] = {
 721                 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 722                 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 723                 { "annotate", cmd_annotate, RUN_SETUP },
 724                 { "apply", cmd_apply },
 725                 { "archive", cmd_archive },
 726                 { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
 727                 { "blame", cmd_blame, RUN_SETUP },
 728                 { "branch", cmd_branch, RUN_SETUP },
 729                 { "bundle", cmd_bundle },
 730                 { "cat-file", cmd_cat_file, RUN_SETUP },
 731                 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
 732                 { "checkout-index", cmd_checkout_index,
 733                         RUN_SETUP | NEED_WORK_TREE},
 734                 { "check-ref-format", cmd_check_ref_format },
 735                 { "check-attr", cmd_check_attr, RUN_SETUP },
 736                 { "cherry", cmd_cherry, RUN_SETUP },
 737                 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
 738                 { "clone", cmd_clone },
 739                 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
 740                 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
 741                 { "commit-tree", cmd_commit_tree, RUN_SETUP },
 742                 { "config", cmd_config },
 743                 { "count-objects", cmd_count_objects, RUN_SETUP },
 744                 { "describe", cmd_describe, RUN_SETUP },
 745                 { "diff", cmd_diff },
 746                 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
 747                 { "diff-index", cmd_diff_index, RUN_SETUP },
 748                 { "diff-tree", cmd_diff_tree, RUN_SETUP },
 749                 { "fast-export", cmd_fast_export, RUN_SETUP },
 750                 { "fetch", cmd_fetch, RUN_SETUP },
 751                 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
 752                 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
 753                 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
 754                 { "format-patch", cmd_format_patch, RUN_SETUP },
 755                 { "fsck", cmd_fsck, RUN_SETUP },
 756                 { "fsck-objects", cmd_fsck, RUN_SETUP },
 757                 { "gc", cmd_gc, RUN_SETUP },
 758                 { "get-tar-commit-id", cmd_get_tar_commit_id },
 759                 { "grep", cmd_grep },
 760                 { "hash-object", cmd_hash_object },
 761                 { "help", cmd_help },
 762                 { "index-pack", cmd_index_pack },
 763                 { "init", cmd_init_db },
 764                 { "init-db", cmd_init_db },
 765                 { "log", cmd_log, RUN_SETUP },
 766                 { "ls-files", cmd_ls_files, RUN_SETUP },
 767                 { "ls-tree", cmd_ls_tree, RUN_SETUP },
 768                 { "ls-remote", cmd_ls_remote },
 769                 { "mailinfo", cmd_mailinfo },
 770                 { "mailsplit", cmd_mailsplit },
 771                 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
 772                 { "merge-base", cmd_merge_base, RUN_SETUP },
 773                 { "merge-file", cmd_merge_file },
 774                 { "merge-index", cmd_merge_index, RUN_SETUP },
 775                 { "merge-ours", cmd_merge_ours, RUN_SETUP },
 776                 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 777                 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 778                 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 779                 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 780                 { "merge-tree", cmd_merge_tree, RUN_SETUP },
 781                 { "mktag", cmd_mktag, RUN_SETUP },
 782                 { "mktree", cmd_mktree, RUN_SETUP },
 783                 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
 784                 { "name-rev", cmd_name_rev, RUN_SETUP },
 785                 { "notes", cmd_notes, RUN_SETUP },
 786                 { "pack-objects", cmd_pack_objects, RUN_SETUP },
 787                 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
 788                 { "patch-id", cmd_patch_id },
 789                 { "pickaxe", cmd_blame, RUN_SETUP },
 790                 { "prune", cmd_prune, RUN_SETUP },
 791                 { "prune-packed", cmd_prune_packed, RUN_SETUP },
 792                 { "push", cmd_push, RUN_SETUP },
 793                 { "read-tree", cmd_read_tree, RUN_SETUP },
 794                 { "receive-pack", cmd_receive_pack },
 795                 { "reflog", cmd_reflog, RUN_SETUP },
 796                 { "remote", cmd_remote, RUN_SETUP },
 797                 { "replace", cmd_replace, RUN_SETUP },
 798                 { "rerere", cmd_rerere, RUN_SETUP },
 799                 { "reset", cmd_reset, RUN_SETUP },
 800                 { "rev-list", cmd_rev_list, RUN_SETUP },
 801                 { "rev-parse", cmd_rev_parse },
 802                 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
 803                 { "rm", cmd_rm, RUN_SETUP },
 804                 { "send-pack", cmd_send_pack, RUN_SETUP },
 805                 { "shortlog", cmd_shortlog, USE_PAGER },
 806                 { "show-branch", cmd_show_branch, RUN_SETUP },
 807                 { "show", cmd_show, RUN_SETUP },
 808                 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
 809                 { "stripspace", cmd_stripspace },
 810                 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
 811                 { "tag", cmd_tag, RUN_SETUP },
 812                 { "unpack-file", cmd_unpack_file, RUN_SETUP },
 813                 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
 814                 { "update-index", cmd_update_index, RUN_SETUP },
 815                 { "update-ref", cmd_update_ref, RUN_SETUP },
 816                 { "update-server-info", cmd_update_server_info, RUN_SETUP },
 817                 { "upload-archive", cmd_upload_archive },
 818                 { "var", cmd_var },
 819                 { "verify-tag", cmd_verify_tag, RUN_SETUP },
 820                 { "version", cmd_version },
 821                 { "whatchanged", cmd_whatchanged, RUN_SETUP },
 822                 { "write-tree", cmd_write_tree, RUN_SETUP },
 823                 { "verify-pack", cmd_verify_pack },
 824                 { "show-ref", cmd_show_ref, RUN_SETUP },
 825                 { "pack-refs", cmd_pack_refs, RUN_SETUP },
 826         };
 827
 828 int is_builtin(const char *s)
 829 {
 830         int i;
 831         for (i = 0; i < ARRAY_SIZE(commands); i++) {
 832                 struct cmd_struct *p = commands+i;
 833                 if (!strcmp(s, p->cmd))
 834                         return 1;
 835         }
 836         return 0;
 837 }
 838
 839 int git_run_cmd(char *cmd, char *arg)
 840 {
 841
 842         int i=0;
 843         char ** argv=0;
 844         int argc=0;
 845
 846         git_init();
 847
 848         for(i=0;i<      sizeof(commands) / sizeof(struct cmd_struct);i++)
 849         {
 850                 if(strcmp(cmd,commands[i].cmd)==0)
 851                 {
 852                         int ret;
 853                         if(arg != NULL)
 854                                 argv = strtoargv(arg,&argc);
 855
 856                         ret = commands[i].fn(argc, argv, NULL);
 857
 858                         if(argv)
 859                                 free(argv);
 860
 861                         discard_cache();
 862                         free_all_pack();
 863
 864                         return ret;
 865
 866
 867                 }
 868         }
 869         return -1;
 870 }
 871
 872 int git_for_each_ref_in(const char * refname, each_ref_fn fn, void * data)
 873 {
 874         int ret;
 875         invalidate_ref_cache(NULL);
 876         ret = for_each_ref_in(refname, fn, data);
 877         free_all_pack();
 878         return ret;
 879 }
 880
 881 const char *git_resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
 882 {
 883         invalidate_ref_cache(NULL);
 884         return resolve_ref_unsafe(ref,sha1,reading, flag);
 885 }
 886 int git_for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
 887 {
 888         return for_each_reflog_ent(ref,fn,cb_data);
 889 }
 890
 891 int git_deref_tag(const unsigned char *tagsha1, GIT_HASH refhash)
 892 {
 893         struct object *obj = NULL;
 894         obj = parse_object(tagsha1);
 895         if (!obj)
 896                 return -1;
 897
 898         if (obj->type == OBJ_TAG)
 899         {
 900                         obj = deref_tag(obj, "", 0);
 901                         if (!obj)
 902                                 return -1;
 903
 904                         memcpy(refhash, obj->sha1, sizeof(GIT_HASH));
 905                         return 0;
 906         }
 907
 908         return -1;
 909 }
 910
 911 static int update_some(const unsigned char *sha1, const char *base, int baselen,
 912                 const char *pathname, unsigned mode, int stage, void *context)
 913 {
 914         struct cache_entry *ce;
 915         UNREFERENCED_PARAMETER(stage);
 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((unsigned int)strlen(pathname) + baselen);
 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, 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 *matchbuf[1];
 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         matchbuf[0] = NULL;
 956         parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC, PATHSPEC_PREFER_CWD, path, matchbuf);
 957         pathspec.items[0].nowildcard_len = pathspec.items[0].len;
 958         ret = read_tree_recursive(root, "", 0, 0, &pathspec, update_some, ce);
 959         free_pathspec(&pathspec);
 960
 961         if(ret)
 962         {
 963                 free_all_pack();
 964                 free(ce);
 965                 return ret;
 966         }
 967         memset(&state, 0, sizeof(state));
 968         state.force = 1;
 969         state.refresh_cache = 0;
 970
 971         ret = write_entry(ce, outputpath, &state, 0);
 972         free_all_pack();
 973         free(ce);
 974         return ret;
 975 }
 976 struct config_buf
 977 {
 978         char *buf;
 979         const char *key;
 980         size_t size;
 981         int seen;
 982 };
 983
 984 static int get_config(const char *key_, const char *value_, void *cb)
 985 {
 986         struct config_buf *buf;
 987         buf=(struct config_buf*)cb;
 988         if(strcmp(key_, buf->key))
 989                 return 0;
 990
 991         if (value_)
 992                 strncpy(buf->buf,value_,buf->size);
 993         else
 994         {
 995                 buf->buf[0] = 't';
 996                 buf->buf[1] = 'r';
 997                 buf->buf[2] = 'u';
 998                 buf->buf[3] = 'e';
 999                 buf->buf[4] = 0;
1000         }
1001         buf->seen = 1;
1002         return 0;
1003
1004 }
1005
1006 // wchar_t wrapper for git_etc_gitconfig()
1007 const wchar_t *wget_msysgit_etc(void)
1008 {
1009         static const wchar_t *etc_gitconfig = NULL;
1010         wchar_t wpointer[MAX_PATH];
1011
1012         if (etc_gitconfig)
1013                 return etc_gitconfig;
1014
1015         if (xutftowcs_path(wpointer, git_etc_gitconfig()) < 0)
1016                 return NULL;
1017
1018         etc_gitconfig = _wcsdup(wpointer);
1019
1020         return etc_gitconfig;
1021 }
1022
1023 int git_get_config(const char *key, char *buffer, int size)
1024 {
1025         char *local, *global, *globalxdg;
1026         const char *home, *system;
1027         struct config_buf buf;
1028
1029         buf.buf=buffer;
1030         buf.size=size;
1031         buf.seen = 0;
1032         buf.key = key;
1033
1034         home = get_windows_home_directory();
1035         if (home)
1036         {
1037                 global = xstrdup(mkpath("%s/.gitconfig", home));
1038                 globalxdg = xstrdup(mkpath("%s/.config/git/config", home));
1039         }
1040         else
1041         {
1042                 global = NULL;
1043                 globalxdg = NULL;
1044         }
1045
1046         system = git_etc_gitconfig();
1047
1048         local = git_pathdup("config");
1049
1050         if ( !buf.seen)
1051                 git_config_with_options(get_config, &buf, local, NULL, 1);
1052         if (!buf.seen && global)
1053                 git_config_with_options(get_config, &buf, global, NULL, 1);
1054         if (!buf.seen && globalxdg)
1055                 git_config_with_options(get_config, &buf, globalxdg, NULL, 1);
1056         if (!buf.seen && system)
1057                 git_config_with_options(get_config, &buf, system, NULL, 1);
1058
1059         if(local)
1060                 free(local);
1061         if(global)
1062                 free(global);
1063         if (globalxdg)
1064                 free(globalxdg);
1065
1066         return !buf.seen;
1067 }
1068
1069 // taken from msysgit: compat/mingw.c
1070 const char *get_windows_home_directory(void)
1071 {
1072         static const char *home_directory = NULL;
1073         struct strbuf buf = STRBUF_INIT;
1074
1075         if (home_directory)
1076                 return home_directory;
1077
1078         home_directory = getenv("HOME");
1079         if (home_directory && *home_directory)
1080                 return home_directory;
1081
1082         strbuf_addf(&buf, "%s%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1083         home_directory = strbuf_detach(&buf, NULL);
1084
1085         return home_directory;
1086 }
1087
1088 // wchar_t wrapper for get_windows_home_directory()
1089 const wchar_t *wget_windows_home_directory(void)
1090 {
1091         static const wchar_t *home_directory = NULL;
1092         wchar_t wpointer[MAX_PATH];
1093
1094         if (home_directory)
1095                 return home_directory;
1096
1097         if (xutftowcs_path(wpointer, get_windows_home_directory()) < 0)
1098                 return NULL;
1099
1100         home_directory = _wcsdup(wpointer);
1101
1102         return home_directory;
1103 }
1104
1105 int get_set_config(const char *key, const char *value, CONFIG_TYPE type)
1106 {
1107         char * config_exclusive_filename = NULL;
1108
1109         switch(type)
1110         {
1111         case CONFIG_LOCAL:
1112                 config_exclusive_filename  = git_pathdup("config");
1113                 break;
1114         case CONFIG_GLOBAL:
1115         case CONFIG_XDGGLOBAL:
1116                 {
1117                         const char *home = get_windows_home_directory();
1118                         if (home)
1119                         {
1120                                 if (type == CONFIG_GLOBAL)
1121                                         config_exclusive_filename = xstrdup(mkpath("%s/.gitconfig", home));
1122                                 else
1123                                         config_exclusive_filename = xstrdup(mkpath("%s/.config/git/config", home));
1124                         }
1125                 }
1126                 break;
1127         }
1128
1129         if(!config_exclusive_filename)
1130                 return -1;
1131
1132         return git_config_set_multivar_in_file(config_exclusive_filename, key, value, NULL, 0);
1133 }
1134
1135 struct mailmap_info {
1136         char *name;
1137         char *email;
1138 };
1139
1140 struct mailmap_entry {
1141         /* name and email for the simple mail-only case */
1142         char *name;
1143         char *email;
1144
1145         /* name and email for the complex mail and name matching case */
1146         struct string_list namemap;
1147 };
1148
1149 int git_read_mailmap(GIT_MAILMAP *mailmap)
1150 {
1151         struct string_list *map;
1152         int result;
1153
1154         if (!mailmap)
1155                 return -1;
1156
1157         *mailmap = NULL;
1158         if ((map = (struct string_list *)calloc(1, sizeof(struct string_list))) == NULL)
1159                 return -1;
1160
1161         if ((result = read_mailmap(map, NULL)) != 0)
1162                 return result;
1163
1164         *mailmap = map;
1165         return 0;
1166 }
1167
1168 const char * git_get_mailmap_author(GIT_MAILMAP mailmap, const char *email2, void *payload, const char *(*author2_cb)(void *))
1169 {
1170         struct string_list *map;
1171         int imax, imin = 0;
1172
1173         if (!mailmap)
1174                 return NULL;
1175
1176         map = (struct string_list *)mailmap;
1177         imax = map->nr - 1;
1178         while (imax >= imin)
1179         {
1180                 int i = imin + ((imax - imin) / 2);
1181                 struct string_list_item *si = (struct string_list_item *)&map->items[i];
1182                 struct mailmap_entry *me = (struct mailmap_entry *)si->util;
1183                 int comp = strcmp(si->string, email2);
1184
1185                 if (!comp)
1186                 {
1187                         if (me->namemap.nr)
1188                         {
1189                                 const char *author2 = author2_cb(payload);
1190                                 unsigned int j;
1191                                 for (j = 0; j < me->namemap.nr; ++j)
1192                                 {
1193                                         struct string_list_item *sj = (struct string_list_item *)&me->namemap.items[j];
1194                                         struct mailmap_info *mi = (struct mailmap_info *)sj->util;
1195
1196                                         if (!strcmp(sj->string, author2))
1197                                                 return mi->name;
1198                                 }
1199                         }
1200
1201                         return me->name;
1202                 }
1203                 else if (comp < 0)
1204                         imin = i + 1;
1205                 else
1206                         imax = i - 1;
1207         }
1208
1209         return NULL;
1210 }
1211
1212 void git_free_mailmap(GIT_MAILMAP mailmap)
1213 {
1214         if (!mailmap)
1215                 return;
1216
1217         clear_mailmap((struct string_list *)mailmap);
1218         free(mailmap);
1219 }
1220