ext/gitdll/gitdll.c

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2014 - TortoiseGit
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 // gitdll.cpp : Defines the exported functions for the DLL application.
  20 //
  21
  22 #include "stdafx.h"
  23 #include "../build/libgit-defines.h"
  24 #include "git-compat-util.h"
  25 #include "gitdll.h"
  26 #include "cache.h"
  27 #include "commit.h"
  28 #include "diff.h"
  29 #include "revision.h"
  30 #include "diffcore.h"
  31 #include "dir.h"
  32 #include "builtin.h"
  33 #include "exec_cmd.h"
  34 #include "cache.h"
  35 #include "quote.h"
  36 #include "run-command.h"
  37 #include "mailmap.h"
  38
  39 extern char g_last_error[];
  40 const char * g_prefix;
  41
  42 extern void die_dll(const char *err, va_list params);
  43 extern int die_is_recursing_dll();
  44
  45 void dll_entry()
  46 {
  47         set_die_routine(die_dll);
  48         set_die_is_recursing_routine(die_is_recursing_dll);
  49 }
  50
  51 int git_get_sha1(const char *name, GIT_HASH sha1)
  52 {
  53         return get_sha1(name,sha1);
  54 }
  55
  56 static int convert_slash(char * path)
  57 {
  58         while(*path)
  59         {
  60                 if(*path == '\\' )
  61                         *path = '/';
  62                 path++;
  63         }
  64         return 0;
  65 }
  66
  67 int git_init()
  68 {
  69         char path[MAX_PATH+1];
  70         int ret;
  71         size_t homesize;
  72
  73         _fmode = _O_BINARY;
  74         _setmode(_fileno(stdin), _O_BINARY);
  75         _setmode(_fileno(stdout), _O_BINARY);
  76         _setmode(_fileno(stderr), _O_BINARY);
  77
  78         // set HOME if not set already
  79         getenv_s(&homesize, NULL, 0, "HOME");
  80         if (!homesize)
  81         {
  82                 _wputenv_s(L"HOME", wget_windows_home_directory());
  83         }
  84         GetModuleFileName(NULL, path, MAX_PATH);
  85         convert_slash(path);
  86
  87         git_extract_argv0_path(path);
  88         g_prefix = setup_git_directory();
  89         ret = git_config(git_default_config, NULL);
  90
  91         if (!homesize)
  92         {
  93                 _putenv_s("HOME","");/* clear home evironment to avoid affact third part software*/
  94         }
  95
  96         return ret;
  97 }
  98
  99 static int git_parse_commit_author(struct GIT_COMMIT_AUTHOR *author, char *pbuff)
 100 {
 101         char *end;
 102
 103         author->Name=pbuff;
 104         end=strchr(pbuff,'<');
 105         if( end == 0)
 106         {
 107                 return -1;
 108         }
 109         author->NameSize = end - pbuff - 1;
 110
 111         pbuff = end +1;
 112         end = strchr(pbuff, '>');
 113         if( end == 0)
 114                 return -1;
 115
 116         author->Email = pbuff ;
 117         author->EmailSize = end - pbuff;
 118
 119         pbuff = end + 2;
 120
 121         author->Date = atol(pbuff);
 122         end =  strchr(pbuff, ' ');
 123         if( end == 0 )
 124                 return -1;
 125
 126         pbuff=end;
 127         author->TimeZone = atol(pbuff);
 128
 129         return 0;
 130 }
 131
 132 int git_parse_commit(GIT_COMMIT *commit)
 133 {
 134         int ret = 0;
 135         char *pbuf;
 136         char *end;
 137         struct commit *p;
 138
 139         p= (struct commit *)commit->m_pGitCommit;
 140
 141         memcpy(commit->m_hash,p->object.sha1,GIT_HASH_SIZE);
 142
 143         commit->m_Encode = NULL;
 144         commit->m_EncodeSize = 0;
 145
 146         if(p->buffer == NULL)
 147                 return -1;
 148
 149         pbuf = p->buffer;
 150         while(pbuf)
 151         {
 152                 if (strncmp(pbuf, "author", 6) == 0)
 153                 {
 154                         ret = git_parse_commit_author(&commit->m_Author,pbuf + 7);
 155                         if(ret)
 156                                 return ret;
 157                 }
 158                 else if (strncmp(pbuf, "committer", 9) == 0)
 159                 {
 160                         ret =  git_parse_commit_author(&commit->m_Committer,pbuf + 10);
 161                         if(ret)
 162                                 return ret;
 163
 164                         pbuf = strchr(pbuf,'\n');
 165                         if(pbuf == NULL)
 166                                 return -1;
 167                 }
 168                 else if (strncmp(pbuf, "encoding", 8) == 0)
 169                 {
 170                         pbuf += 9;
 171                         commit->m_Encode=pbuf;
 172                         end = strchr(pbuf,'\n');
 173                         commit->m_EncodeSize=end -pbuf;
 174                 }
 175
 176                 // the headers end after the first empty line
 177                 else if (*pbuf == '\n')
 178                 {
 179                         pbuf++;
 180
 181                         commit->m_Subject=pbuf;
 182                         end = strchr(pbuf,'\n');
 183                         if( end == 0)
 184                                 commit->m_SubjectSize = strlen(pbuf);
 185                         else
 186                         {
 187                                 commit->m_SubjectSize = end - pbuf;
 188                                 pbuf = end +1;
 189                                 commit->m_Body = pbuf;
 190                                 commit->m_BodySize = strlen(pbuf);
 191                                 return 0;
 192                         }
 193                 }
 194
 195                 pbuf = strchr(pbuf,'\n');
 196                 if(pbuf)
 197                         pbuf ++;
 198         }
 199         return 0;
 200 }
 201
 202 int git_get_commit_from_hash(GIT_COMMIT *commit, GIT_HASH hash)
 203 {
 204         int ret = 0;
 205
 206         struct commit *p;
 207
 208         if (commit == NULL)
 209                 return -1;
 210
 211         memset(commit,0,sizeof(GIT_COMMIT));
 212
 213         commit->m_pGitCommit = p = lookup_commit(hash);
 214
 215         if(p == NULL)
 216                 return -1;
 217
 218         ret = parse_commit(p);
 219         if( ret )
 220                 return ret;
 221
 222         return git_parse_commit(commit);
 223 }
 224
 225 int git_get_commit_first_parent(GIT_COMMIT *commit,GIT_COMMIT_LIST *list)
 226 {
 227         struct commit *p = commit->m_pGitCommit;
 228
 229         if(list == NULL)
 230                 return -1;
 231
 232         *list = (GIT_COMMIT_LIST*)p->parents;
 233         return 0;
 234 }
 235 int git_get_commit_next_parent(GIT_COMMIT_LIST *list, GIT_HASH hash)
 236 {
 237         struct commit_list *l;
 238         if (list == NULL)
 239                 return -1;
 240
 241         l = *(struct commit_list **)list;
 242         if (l == NULL)
 243                 return -1;
 244
 245         if(hash)
 246                 memcpy(hash, l->item->object.sha1, GIT_HASH_SIZE);
 247
 248         *list = (GIT_COMMIT_LIST *)l->next;
 249         return 0;
 250
 251 }
 252
 253
 254 int git_free_commit(GIT_COMMIT *commit)
 255 {
 256         struct commit *p = commit->m_pGitCommit;
 257
 258         if( p->parents)
 259                 free_commit_list(p->parents);
 260
 261         if( p->buffer )
 262         {
 263                 free(p->buffer);
 264                 p->buffer=NULL;
 265                 p->object.parsed=0;
 266                 p->parents=0;
 267                 p->tree=0;
 268         }
 269         memset(commit,0,sizeof(GIT_COMMIT));
 270         return 0;
 271 }
 272
 273 char **strtoargv(char *arg, int *size)
 274 {
 275         int count=0;
 276         char *p=arg;
 277         char **argv;
 278
 279         int i=0;
 280         while(*p)
 281         {
 282                 if(*p == '\\')
 283                         *p='/';
 284                 p++;
 285         }
 286         p=arg;
 287
 288         while(*p)
 289         {
 290                 if(*p == ' ')
 291                         count ++;
 292                 p++;
 293         }
 294
 295         argv=malloc(strlen(arg)+1 + (count +2)*sizeof(void*));
 296         p=(char*)(argv+count+2);
 297
 298         while(*arg)
 299         {
 300                 if(*arg != ' ')
 301                 {
 302                         char space=' ';
 303                         argv[i]=p;
 304
 305                         while(*arg)
 306                         {
 307                                 if(*arg == '"')
 308                                 {
 309                                         arg++;
 310                                         if(space == ' ')
 311                                                 space = '"';
 312                                         else
 313                                                 space = ' ';
 314                                 }
 315                                 if((*arg == space) || (*arg == 0))
 316                                         break;
 317
 318                                 *p++ = *arg++;
 319                         }
 320                         i++;
 321                         *p++=0;
 322                 }
 323                 if(*arg == 0)
 324                         break;
 325                 arg++;
 326         }
 327         argv[i]=NULL;
 328         *size = i;
 329         return argv;
 330 }
 331 int git_open_log(GIT_LOG * handle, char * arg)
 332 {
 333         struct rev_info *p_Rev;
 334         char ** argv=0;
 335         int argc=0;
 336         unsigned int i=0;
 337         struct setup_revision_opt opt;
 338
 339         /* clear flags */
 340         unsigned int obj_size = get_max_object_index();
 341         for(i =0; i<obj_size; i++)
 342         {
 343                 struct object *ob= get_indexed_object(i);
 344                 if(ob)
 345                         ob->flags=0;
 346         }
 347
 348         if(arg != NULL)
 349                 argv = strtoargv(arg,&argc);
 350
 351         if (!argv)
 352                 return -1;
 353
 354         p_Rev = malloc(sizeof(struct rev_info));
 355         memset(p_Rev,0,sizeof(struct rev_info));
 356
 357         if(p_Rev == NULL)
 358                 return -1;
 359
 360         invalidate_ref_cache(NULL);
 361
 362         init_revisions(p_Rev, g_prefix);
 363         p_Rev->diff = 1;
 364
 365         memset(&opt, 0, sizeof(opt));
 366         opt.def = "HEAD";
 367
 368         cmd_log_init(argc, argv, g_prefix,p_Rev,&opt);
 369
 370         p_Rev->pPrivate = argv;
 371         *handle = p_Rev;
 372         return 0;
 373
 374 }
 375 int git_get_log_firstcommit(GIT_LOG handle)
 376 {
 377         return prepare_revision_walk(handle);
 378 }
 379
 380 int git_get_log_estimate_commit_count(GIT_LOG handle)
 381 {
 382         struct rev_info *p_Rev;
 383         p_Rev=(struct rev_info *)handle;
 384
 385         return estimate_commit_count(p_Rev, p_Rev->commits);
 386 }
 387
 388 int git_get_log_nextcommit(GIT_LOG handle, GIT_COMMIT *commit, int follow)
 389 {
 390         int ret =0;
 391
 392         if(commit == NULL)
 393                 return -1;
 394
 395         memset(commit, 0, sizeof(GIT_COMMIT));
 396
 397         commit->m_pGitCommit = get_revision(handle);
 398         if( commit->m_pGitCommit == NULL)
 399                 return -2;
 400
 401         if (follow && !log_tree_commit(handle, commit->m_pGitCommit))
 402         {
 403                 commit->m_ignore = 1;
 404                 return 0;
 405         }
 406         commit->m_ignore = 0;
 407
 408         ret=git_parse_commit(commit);
 409         if(ret)
 410                 return ret;
 411
 412         return 0;
 413 }
 414
 415 struct notes_tree **display_notes_trees;
 416 int git_close_log(GIT_LOG handle)
 417 {
 418         if(handle)
 419         {
 420                 struct rev_info *p_Rev;
 421                 p_Rev=(struct rev_info *)handle;
 422                 if(p_Rev->pPrivate)
 423                         free(p_Rev->pPrivate);
 424                 free(handle);
 425         }
 426         free_all_pack();
 427
 428         if (display_notes_trees)
 429                 free_notes(*display_notes_trees);
 430         display_notes_trees = 0;
 431         return 0;
 432 }
 433
 434 int git_open_diff(GIT_DIFF *diff, char * arg)
 435 {
 436         struct rev_info *p_Rev;
 437         char ** argv=0;
 438         int argc=0;
 439
 440         if(arg != NULL)
 441                 argv = strtoargv(arg,&argc);
 442
 443         p_Rev = malloc(sizeof(struct rev_info));
 444         memset(p_Rev,0,sizeof(struct rev_info));
 445
 446         p_Rev->pPrivate = argv;
 447         *diff = (GIT_DIFF)p_Rev;
 448
 449         init_revisions(p_Rev, g_prefix);
 450         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 451         p_Rev->abbrev = 0;
 452         p_Rev->diff = 1;
 453         argc = setup_revisions(argc, argv, p_Rev, NULL);
 454
 455         return 0;
 456 }
 457 int git_close_diff(GIT_DIFF handle)
 458 {
 459         git_diff_flush(handle);
 460         if(handle)
 461         {
 462                 struct rev_info *p_Rev;
 463                 p_Rev=(struct rev_info *)handle;
 464                 if(p_Rev->pPrivate)
 465                         free(p_Rev->pPrivate);
 466                 free(handle);
 467         }
 468         return 0;
 469 }
 470 int git_diff_flush(GIT_DIFF diff)
 471 {
 472         struct diff_queue_struct *q = &diff_queued_diff;
 473         struct rev_info *p_Rev;
 474         int i;
 475         p_Rev = (struct rev_info *)diff;
 476
 477         if(q->nr == 0)
 478                 return 0;
 479
 480         for (i = 0; i < q->nr; i++)
 481                 diff_free_filepair(q->queue[i]);
 482
 483         if(q->queue)
 484         {
 485                 free(q->queue);
 486                 q->queue = NULL;
 487                 q->nr = q->alloc = 0;
 488         }
 489
 490         if (p_Rev->diffopt.close_file)
 491                 fclose(p_Rev->diffopt.file);
 492
 493         free_diffstat_info(&p_Rev->diffstat);
 494         return 0;
 495 }
 496
 497 int git_root_diff(GIT_DIFF diff, GIT_HASH hash,GIT_FILE *file, int *count, int isstat)
 498 {
 499         int ret;
 500         struct rev_info *p_Rev;
 501         int i;
 502         struct diff_queue_struct *q = &diff_queued_diff;
 503
 504         p_Rev = (struct rev_info *)diff;
 505
 506         ret=diff_root_tree_sha1(hash, "", &p_Rev->diffopt);
 507
 508         if(ret)
 509                 return ret;
 510
 511         if(isstat)
 512         {
 513                 diffcore_std(&p_Rev->diffopt);
 514
 515                 memset(&p_Rev->diffstat, 0, sizeof(struct diffstat_t));
 516                 for (i = 0; i < q->nr; i++) {
 517                         struct diff_filepair *p = q->queue[i];
 518                         //if (check_pair_status(p))
 519                         diff_flush_stat(p, &p_Rev->diffopt, &p_Rev->diffstat);
 520                 }
 521
 522                 if(file)
 523                         *file = q;
 524                 if(count)
 525                         *count = q->nr;
 526         }
 527         return 0;
 528 }
 529
 530 int git_do_diff(GIT_DIFF diff, GIT_HASH hash1, GIT_HASH hash2, GIT_FILE * file, int *count,int isstat)
 531 {
 532         struct rev_info *p_Rev;
 533         int ret;
 534         int i;
 535         struct diff_queue_struct *q = &diff_queued_diff;
 536
 537         p_Rev = (struct rev_info *)diff;
 538
 539         ret = diff_tree_sha1(hash1,hash2,"",&p_Rev->diffopt);
 540         if( ret )
 541         {
 542                 free_all_pack();
 543                 return ret;
 544         }
 545
 546         if(isstat)
 547         {
 548                 diffcore_std(&p_Rev->diffopt);
 549                 memset(&p_Rev->diffstat, 0, sizeof(struct diffstat_t));
 550                 for (i = 0; i < q->nr; i++) {
 551                         struct diff_filepair *p = q->queue[i];
 552                         //if (check_pair_status(p))
 553                         diff_flush_stat(p, &p_Rev->diffopt, &p_Rev->diffstat);
 554                 }
 555         }
 556         free_all_pack();
 557         if(file)
 558                 *file = q;
 559         if(count)
 560                 *count = q->nr;
 561         return 0;
 562 }
 563
 564 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)
 565 {
 566         struct diff_queue_struct *q = &diff_queued_diff;
 567         struct rev_info *p_Rev;
 568         p_Rev = (struct rev_info *)diff;
 569
 570         q = (struct diff_queue_struct *)file;
 571         if(file == 0)
 572                 return -1;
 573         if(i>=q->nr)
 574                 return -1;
 575
 576         assert(newname && oldname && status);
 577
 578         *newname = q->queue[i]->two->path;
 579         *oldname = q->queue[i]->one->path;
 580         *status = q->queue[i]->status;
 581
 582         if(p_Rev->diffstat.files)
 583         {
 584                 int j;
 585                 for(j=0;j<p_Rev->diffstat.nr;j++)
 586                 {
 587                         if(strcmp(*newname,p_Rev->diffstat.files[j]->name)==0)
 588                                 break;
 589                 }
 590                 if( j== p_Rev->diffstat.nr)
 591                 {
 592                         *IsBin=1;
 593                         *inc=0;
 594                         *dec=0;
 595                         return 0;
 596                 }
 597                 if(IsBin)
 598                         *IsBin = p_Rev->diffstat.files[j]->is_binary;
 599                 if(inc)
 600                         *inc = p_Rev->diffstat.files[j]->added;
 601                 if(dec)
 602                         *dec = p_Rev->diffstat.files[j]->deleted;
 603         }else
 604         {
 605                 *IsBin=1;
 606                 *inc=0;
 607                 *dec=0;
 608         }
 609
 610         return 0;
 611 }
 612
 613 int git_read_tree(GIT_HASH hash,read_tree_fn_t fn, void *context)
 614 {
 615         struct tree * root;
 616         int ret;
 617         reprepare_packed_git();
 618         root = parse_tree_indirect(hash);
 619
 620         if (!root)
 621         {
 622                 free_all_pack();
 623                 return -1;
 624         }
 625         ret = read_tree_recursive(root, NULL, 0, 0, NULL, fn, context);
 626         free_all_pack();
 627         return ret;
 628 }
 629
 630 int git_add_exclude(const char *string, const char *base,
 631                                         int baselen, struct exclude_list *which, int lineno)
 632 {
 633         add_exclude(string, base, baselen, which, lineno);
 634         return 0;
 635 }
 636
 637 int git_create_exclude_list(EXCLUDE_LIST *which)
 638 {
 639         *which = malloc(sizeof(struct exclude_list));
 640         memset(*which,0,sizeof(struct exclude_list));
 641         return 0;
 642 }
 643
 644 int git_free_exclude_list(EXCLUDE_LIST which)
 645 {
 646         int i=0;
 647         struct exclude_list *p = (struct exclude_list *) which;
 648
 649         for(i=0; i<p->nr;i++)
 650         {
 651                 free(p->excludes[i]);
 652         }
 653         free(p->excludes);
 654         free(p);
 655         return 0;
 656 }
 657
 658 int git_check_excluded_1(const char *pathname,
 659                                                         int pathlen, const char *basename, int *dtype,
 660                                                         EXCLUDE_LIST el)
 661 {
 662         return is_excluded_from_list(pathname, pathlen, basename, dtype, el);
 663 }
 664
 665 int git_get_notes(GIT_HASH hash, char **p_note)
 666 {
 667         struct strbuf sb;
 668         size_t size;
 669         strbuf_init(&sb,0);
 670         format_display_notes(hash, &sb, "utf-8", 1);
 671         *p_note = strbuf_detach(&sb,&size);
 672
 673         return 0;
 674 }
 675
 676 struct cmd_struct {
 677         const char *cmd;
 678         int (*fn)(int, const char **, const char *);
 679         int option;
 680 };
 681
 682 #define RUN_SETUP       (1<<0)
 683 #define USE_PAGER       (1<<1)
 684 /*
 685  * require working tree to be present -- anything uses this needs
 686  * RUN_SETUP for reading from the configuration file.
 687  */
 688 #define NEED_WORK_TREE  (1<<2)
 689
 690 const char git_usage_string[] =
 691         "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
 692         "           [-p|--paginate|--no-pager] [--no-replace-objects]\n"
 693         "           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
 694         "           [-c name=value] [--help]\n"
 695         "           COMMAND [ARGS]";
 696
 697 const char git_more_info_string[] =
 698         "See 'git help COMMAND' for more information on a specific command.";
 699
 700 static struct cmd_struct commands[] = {
 701                 { "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 702                 { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 703                 { "annotate", cmd_annotate, RUN_SETUP },
 704                 { "apply", cmd_apply },
 705                 { "archive", cmd_archive },
 706                 { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
 707                 { "blame", cmd_blame, RUN_SETUP },
 708                 { "branch", cmd_branch, RUN_SETUP },
 709                 { "bundle", cmd_bundle },
 710                 { "cat-file", cmd_cat_file, RUN_SETUP },
 711                 { "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
 712                 { "checkout-index", cmd_checkout_index,
 713                         RUN_SETUP | NEED_WORK_TREE},
 714                 { "check-ref-format", cmd_check_ref_format },
 715                 { "check-attr", cmd_check_attr, RUN_SETUP },
 716                 { "cherry", cmd_cherry, RUN_SETUP },
 717                 { "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
 718                 { "clone", cmd_clone },
 719                 { "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
 720                 { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
 721                 { "commit-tree", cmd_commit_tree, RUN_SETUP },
 722                 { "config", cmd_config },
 723                 { "count-objects", cmd_count_objects, RUN_SETUP },
 724                 { "describe", cmd_describe, RUN_SETUP },
 725                 { "diff", cmd_diff },
 726                 { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
 727                 { "diff-index", cmd_diff_index, RUN_SETUP },
 728                 { "diff-tree", cmd_diff_tree, RUN_SETUP },
 729                 { "fast-export", cmd_fast_export, RUN_SETUP },
 730                 { "fetch", cmd_fetch, RUN_SETUP },
 731                 { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
 732                 { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP },
 733                 { "for-each-ref", cmd_for_each_ref, RUN_SETUP },
 734                 { "format-patch", cmd_format_patch, RUN_SETUP },
 735                 { "fsck", cmd_fsck, RUN_SETUP },
 736                 { "fsck-objects", cmd_fsck, RUN_SETUP },
 737                 { "gc", cmd_gc, RUN_SETUP },
 738                 { "get-tar-commit-id", cmd_get_tar_commit_id },
 739                 { "grep", cmd_grep },
 740                 { "hash-object", cmd_hash_object },
 741                 { "help", cmd_help },
 742                 { "index-pack", cmd_index_pack },
 743                 { "init", cmd_init_db },
 744                 { "init-db", cmd_init_db },
 745                 { "log", cmd_log, RUN_SETUP },
 746                 { "ls-files", cmd_ls_files, RUN_SETUP },
 747                 { "ls-tree", cmd_ls_tree, RUN_SETUP },
 748                 { "ls-remote", cmd_ls_remote },
 749                 { "mailinfo", cmd_mailinfo },
 750                 { "mailsplit", cmd_mailsplit },
 751                 { "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
 752                 { "merge-base", cmd_merge_base, RUN_SETUP },
 753                 { "merge-file", cmd_merge_file },
 754                 { "merge-index", cmd_merge_index, RUN_SETUP },
 755                 { "merge-ours", cmd_merge_ours, RUN_SETUP },
 756                 { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 757                 { "merge-recursive-ours", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 758                 { "merge-recursive-theirs", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 759                 { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
 760                 { "merge-tree", cmd_merge_tree, RUN_SETUP },
 761                 { "mktag", cmd_mktag, RUN_SETUP },
 762                 { "mktree", cmd_mktree, RUN_SETUP },
 763                 { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
 764                 { "name-rev", cmd_name_rev, RUN_SETUP },
 765                 { "notes", cmd_notes, RUN_SETUP },
 766                 { "pack-objects", cmd_pack_objects, RUN_SETUP },
 767                 { "pack-redundant", cmd_pack_redundant, RUN_SETUP },
 768                 { "patch-id", cmd_patch_id },
 769                 { "pickaxe", cmd_blame, RUN_SETUP },
 770                 { "prune", cmd_prune, RUN_SETUP },
 771                 { "prune-packed", cmd_prune_packed, RUN_SETUP },
 772                 { "push", cmd_push, RUN_SETUP },
 773                 { "read-tree", cmd_read_tree, RUN_SETUP },
 774                 { "receive-pack", cmd_receive_pack },
 775                 { "reflog", cmd_reflog, RUN_SETUP },
 776                 { "remote", cmd_remote, RUN_SETUP },
 777                 { "replace", cmd_replace, RUN_SETUP },
 778                 { "rerere", cmd_rerere, RUN_SETUP },
 779                 { "reset", cmd_reset, RUN_SETUP },
 780                 { "rev-list", cmd_rev_list, RUN_SETUP },
 781                 { "rev-parse", cmd_rev_parse },
 782                 { "revert", cmd_revert, RUN_SETUP | NEED_WORK_TREE },
 783                 { "rm", cmd_rm, RUN_SETUP },
 784                 { "send-pack", cmd_send_pack, RUN_SETUP },
 785                 { "shortlog", cmd_shortlog, USE_PAGER },
 786                 { "show-branch", cmd_show_branch, RUN_SETUP },
 787                 { "show", cmd_show, RUN_SETUP },
 788                 { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
 789                 { "stripspace", cmd_stripspace },
 790                 { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
 791                 { "tag", cmd_tag, RUN_SETUP },
 792                 { "unpack-file", cmd_unpack_file, RUN_SETUP },
 793                 { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
 794                 { "update-index", cmd_update_index, RUN_SETUP },
 795                 { "update-ref", cmd_update_ref, RUN_SETUP },
 796                 { "update-server-info", cmd_update_server_info, RUN_SETUP },
 797                 { "upload-archive", cmd_upload_archive },
 798                 { "var", cmd_var },
 799                 { "verify-tag", cmd_verify_tag, RUN_SETUP },
 800                 { "version", cmd_version },
 801                 { "whatchanged", cmd_whatchanged, RUN_SETUP },
 802                 { "write-tree", cmd_write_tree, RUN_SETUP },
 803                 { "verify-pack", cmd_verify_pack },
 804                 { "show-ref", cmd_show_ref, RUN_SETUP },
 805                 { "pack-refs", cmd_pack_refs, RUN_SETUP },
 806         };
 807
 808 int is_builtin(const char *s)
 809 {
 810         int i;
 811         for (i = 0; i < ARRAY_SIZE(commands); i++) {
 812                 struct cmd_struct *p = commands+i;
 813                 if (!strcmp(s, p->cmd))
 814                         return 1;
 815         }
 816         return 0;
 817 }
 818
 819 int git_run_cmd(char *cmd, char *arg)
 820 {
 821
 822         int i=0;
 823         char ** argv=0;
 824         int argc=0;
 825
 826         git_init();
 827
 828         for(i=0;i<      sizeof(commands) / sizeof(struct cmd_struct);i++)
 829         {
 830                 if(strcmp(cmd,commands[i].cmd)==0)
 831                 {
 832                         int ret;
 833                         if(arg != NULL)
 834                                 argv = strtoargv(arg,&argc);
 835
 836                         ret = commands[i].fn(argc, argv, NULL);
 837
 838                         if(argv)
 839                                 free(argv);
 840
 841                         discard_cache();
 842                         free_all_pack();
 843
 844                         return ret;
 845
 846
 847                 }
 848         }
 849         return -1;
 850 }
 851
 852 int git_for_each_ref_in(const char * refname, each_ref_fn fn, void * data)
 853 {
 854         int ret;
 855         invalidate_ref_cache(NULL);
 856         ret = for_each_ref_in(refname, fn, data);
 857         free_all_pack();
 858         return ret;
 859 }
 860
 861 const char *git_resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
 862 {
 863         invalidate_ref_cache(NULL);
 864         return resolve_ref_unsafe(ref,sha1,reading, flag);
 865 }
 866 int git_for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
 867 {
 868         return for_each_reflog_ent(ref,fn,cb_data);
 869 }
 870
 871 int git_deref_tag(const unsigned char *tagsha1, GIT_HASH refhash)
 872 {
 873         struct object *obj = NULL;
 874         obj = parse_object(tagsha1);
 875         if (!obj)
 876                 return -1;
 877
 878         if (obj->type == OBJ_TAG)
 879         {
 880                         obj = deref_tag(obj, "", 0);
 881                         if (!obj)
 882                                 return -1;
 883
 884                         memcpy(refhash, obj->sha1, sizeof(GIT_HASH));
 885                         return 0;
 886         }
 887
 888         return -1;
 889 }
 890
 891 static int update_some(const unsigned char *sha1, const char *base, int baselen,
 892                 const char *pathname, unsigned mode, int stage, void *context)
 893 {
 894         struct cache_entry *ce;
 895         UNREFERENCED_PARAMETER(stage);
 896
 897         ce = (struct cache_entry *)context;
 898
 899         if (S_ISDIR(mode))
 900                 return READ_TREE_RECURSIVE;
 901
 902         hashcpy(ce->sha1, sha1);
 903         memcpy(ce->name, base, baselen);
 904         memcpy(ce->name + baselen, pathname, strlen(pathname));
 905         ce->ce_flags = create_ce_flags(strlen(pathname) + baselen);
 906         ce->ce_mode = create_ce_mode(mode);
 907
 908         return 0;
 909 }
 910
 911 int git_checkout_file(const char *ref, const char *path, const char *outputpath)
 912 {
 913         struct cache_entry *ce;
 914         int ret;
 915         GIT_HASH sha1;
 916         struct tree * root;
 917         struct checkout state;
 918         struct pathspec pathspec;
 919         const char *matchbuf[1];
 920         ret = get_sha1(ref, sha1);
 921         if(ret)
 922                 return ret;
 923
 924         reprepare_packed_git();
 925         root = parse_tree_indirect(sha1);
 926
 927         if(!root)
 928         {
 929                 free_all_pack();
 930                 return -1;
 931         }
 932
 933         ce = xcalloc(1, cache_entry_size(strlen(path)));
 934
 935         matchbuf[0] = NULL;
 936         parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC, PATHSPEC_PREFER_CWD, path, matchbuf);
 937         pathspec.items[0].nowildcard_len = pathspec.items[0].len;
 938         ret = read_tree_recursive(root, "", 0, 0, &pathspec, update_some, ce);
 939         free_pathspec(&pathspec);
 940
 941         if(ret)
 942         {
 943                 free_all_pack();
 944                 free(ce);
 945                 return ret;
 946         }
 947         memset(&state, 0, sizeof(state));
 948         state.force = 1;
 949         state.refresh_cache = 0;
 950
 951         ret = write_entry(ce, outputpath, &state, 0);
 952         free_all_pack();
 953         free(ce);
 954         return ret;
 955 }
 956 struct config_buf
 957 {
 958         char *buf;
 959         const char *key;
 960         size_t size;
 961         int seen;
 962 };
 963
 964 static int get_config(const char *key_, const char *value_, void *cb)
 965 {
 966         struct config_buf *buf;
 967         buf=(struct config_buf*)cb;
 968         if(strcmp(key_, buf->key))
 969                 return 0;
 970
 971         if (value_)
 972                 strncpy(buf->buf,value_,buf->size);
 973         else
 974         {
 975                 buf->buf[0] = 't';
 976                 buf->buf[1] = 'r';
 977                 buf->buf[2] = 'u';
 978                 buf->buf[3] = 'e';
 979                 buf->buf[4] = 0;
 980         }
 981         buf->seen = 1;
 982         return 0;
 983
 984 }
 985
 986 // wchar_t wrapper for git_etc_gitconfig()
 987 const wchar_t *wget_msysgit_etc(void)
 988 {
 989         static const wchar_t *etc_gitconfig = NULL;
 990         wchar_t wpointer[MAX_PATH];
 991
 992         if (etc_gitconfig)
 993                 return etc_gitconfig;
 994
 995         if (xutftowcs_path(wpointer, git_etc_gitconfig()) < 0)
 996                 return NULL;
 997
 998         etc_gitconfig = _wcsdup(wpointer);
 999
1000         return etc_gitconfig;
1001 }
1002
1003 int git_get_config(const char *key, char *buffer, int size)
1004 {
1005         char *local, *global, *globalxdg;
1006         const char *home, *system;
1007         struct config_buf buf;
1008
1009         buf.buf=buffer;
1010         buf.size=size;
1011         buf.seen = 0;
1012         buf.key = key;
1013
1014         home = get_windows_home_directory();
1015         if (home)
1016         {
1017                 global = xstrdup(mkpath("%s/.gitconfig", home));
1018                 globalxdg = xstrdup(mkpath("%s/.config/git/config", home));
1019         }
1020         else
1021         {
1022                 global = NULL;
1023                 globalxdg = NULL;
1024         }
1025
1026         system = git_etc_gitconfig();
1027
1028         local = git_pathdup("config");
1029
1030         if ( !buf.seen)
1031                 git_config_with_options(get_config, &buf, local, NULL, 1);
1032         if (!buf.seen && global)
1033                 git_config_with_options(get_config, &buf, global, NULL, 1);
1034         if (!buf.seen && globalxdg)
1035                 git_config_with_options(get_config, &buf, globalxdg, NULL, 1);
1036         if (!buf.seen && system)
1037                 git_config_with_options(get_config, &buf, system, NULL, 1);
1038
1039         if(local)
1040                 free(local);
1041         if(global)
1042                 free(global);
1043         if (globalxdg)
1044                 free(globalxdg);
1045
1046         return !buf.seen;
1047 }
1048
1049 // taken from msysgit: compat/mingw.c
1050 const char *get_windows_home_directory(void)
1051 {
1052         static const char *home_directory = NULL;
1053         struct strbuf buf = STRBUF_INIT;
1054
1055         if (home_directory)
1056                 return home_directory;
1057
1058         home_directory = getenv("HOME");
1059         if (home_directory && *home_directory)
1060                 return home_directory;
1061
1062         strbuf_addf(&buf, "%s%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
1063         home_directory = strbuf_detach(&buf, NULL);
1064
1065         return home_directory;
1066 }
1067
1068 // wchar_t wrapper for get_windows_home_directory()
1069 const wchar_t *wget_windows_home_directory(void)
1070 {
1071         static const wchar_t *home_directory = NULL;
1072         wchar_t wpointer[MAX_PATH];
1073
1074         if (home_directory)
1075                 return home_directory;
1076
1077         if (xutftowcs_path(wpointer, get_windows_home_directory()) < 0)
1078                 return NULL;
1079
1080         home_directory = _wcsdup(wpointer);
1081
1082         return home_directory;
1083 }
1084
1085 int get_set_config(const char *key, const char *value, CONFIG_TYPE type)
1086 {
1087         char * config_exclusive_filename = NULL;
1088
1089         switch(type)
1090         {
1091         case CONFIG_LOCAL:
1092                 config_exclusive_filename  = git_pathdup("config");
1093                 break;
1094         case CONFIG_GLOBAL:
1095         case CONFIG_XDGGLOBAL:
1096                 {
1097                         const char *home = get_windows_home_directory();
1098                         if (home)
1099                         {
1100                                 if (type == CONFIG_GLOBAL)
1101                                         config_exclusive_filename = xstrdup(mkpath("%s/.gitconfig", home));
1102                                 else
1103                                         config_exclusive_filename = xstrdup(mkpath("%s/.config/git/config", home));
1104                         }
1105                 }
1106                 break;
1107         }
1108
1109         if(!config_exclusive_filename)
1110                 return -1;
1111
1112         return git_config_set_multivar_in_file(config_exclusive_filename, key, value, NULL, 0);
1113 }
1114
1115 struct mailmap_info {
1116         char *name;
1117         char *email;
1118 };
1119
1120 struct mailmap_entry {
1121         /* name and email for the simple mail-only case */
1122         char *name;
1123         char *email;
1124
1125         /* name and email for the complex mail and name matching case */
1126         struct string_list namemap;
1127 };
1128
1129 int git_read_mailmap(GIT_MAILMAP *mailmap)
1130 {
1131         struct string_list *map;
1132         int result;
1133
1134         if (!mailmap)
1135                 return -1;
1136
1137         *mailmap = NULL;
1138         if ((map = (struct string_list *)calloc(1, sizeof(struct string_list))) == NULL)
1139                 return -1;
1140
1141         if ((result = read_mailmap(map, NULL)) != 0)
1142                 return result;
1143
1144         *mailmap = map;
1145         return 0;
1146 }
1147
1148 const char * git_get_mailmap_author(GIT_MAILMAP mailmap, const char *email2, void *payload, const char *(*author2_cb)(void *))
1149 {
1150         struct string_list *map;
1151         int imax, imin = 0;
1152
1153         if (!mailmap)
1154                 return NULL;
1155
1156         map = (struct string_list *)mailmap;
1157         imax = map->nr - 1;
1158         while (imax >= imin)
1159         {
1160                 int i = imin + ((imax - imin) / 2);
1161                 struct string_list_item *si = (struct string_list_item *)&map->items[i];
1162                 struct mailmap_entry *me = (struct mailmap_entry *)si->util;
1163                 int comp = strcmp(si->string, email2);
1164
1165                 if (!comp)
1166                 {
1167                         if (me->namemap.nr)
1168                         {
1169                                 const char *author2 = author2_cb(payload);
1170                                 unsigned int j;
1171                                 for (j = 0; j < me->namemap.nr; ++j)
1172                                 {
1173                                         struct string_list_item *sj = (struct string_list_item *)&me->namemap.items[j];
1174                                         struct mailmap_info *mi = (struct mailmap_info *)sj->util;
1175
1176                                         if (!strcmp(sj->string, author2))
1177                                                 return mi->name;
1178                                 }
1179                         }
1180
1181                         return me->name;
1182                 }
1183                 else if (comp < 0)
1184                         imin = i + 1;
1185                 else
1186                         imax = i - 1;
1187         }
1188
1189         return NULL;
1190 }
1191
1192 void git_free_mailmap(GIT_MAILMAP mailmap)
1193 {
1194         if (!mailmap)
1195                 return;
1196
1197         clear_mailmap((struct string_list *)mailmap);
1198         free(mailmap);
1199 }
1200