src/tig.c

   1 /* Copyright (c) 2006-2014 Jonas Fonseca <jonas.fonseca@gmail.com>
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License as
   5  * published by the Free Software Foundation; either version 2 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #define WARN_MISSING_CURSES_CONFIGURATION
  15
  16 #include "tig/tig.h"
  17 #include "tig/types.h"
  18 #include "tig/util.h"
  19 #include "tig/parse.h"
  20 #include "tig/io.h"
  21 #include "tig/argv.h"
  22 #include "tig/refdb.h"
  23 #include "tig/graph.h"
  24 #include "tig/git.h"
  25 #include "tig/request.h"
  26 #include "tig/line.h"
  27 #include "tig/keys.h"
  28 #include "tig/view.h"
  29 #include "tig/repo.h"
  30 #include "tig/options.h"
  31 #include "tig/draw.h"
  32 #include "tig/display.h"
  33 #include "tig/prompt.h"
  34
  35 /* Views. */
  36 #include "tig/blame.h"
  37 #include "tig/blob.h"
  38 #include "tig/diff.h"
  39 #include "tig/grep.h"
  40 #include "tig/help.h"
  41 #include "tig/log.h"
  42 #include "tig/main.h"
  43 #include "tig/pager.h"
  44 #include "tig/refs.h"
  45 #include "tig/stage.h"
  46 #include "tig/stash.h"
  47 #include "tig/status.h"
  48 #include "tig/tree.h"
  49
  50 static bool
  51 forward_request_to_child(struct view *child, enum request request)
  52 {
  53         return displayed_views() == 2 && view_is_displayed(child) &&
  54                 !strcmp(child->vid, child->ops->id);
  55 }
  56
  57 static enum request
  58 view_request(struct view *view, enum request request)
  59 {
  60         if (!view || !view->lines)
  61                 return request;
  62
  63         if (request == REQ_ENTER && !opt_focus_child &&
  64             view_has_flags(view, VIEW_SEND_CHILD_ENTER)) {
  65                 struct view *child = display[1];
  66
  67                 if (forward_request_to_child(child, request)) {
  68                         view_request(child, request);
  69                         return REQ_NONE;
  70                 }
  71         }
  72
  73         if (request == REQ_REFRESH && !view_can_refresh(view)) {
  74                 report("This view can not be refreshed");
  75                 return REQ_NONE;
  76         }
  77
  78         return view->ops->request(view, request, &view->line[view->pos.lineno]);
  79 }
  80
  81 /*
  82  * Option management
  83  */
  84
  85 #define TOGGLE_MENU_INFO(_) \
  86         _('.', "line numbers",                  "line-number"), \
  87         _('D', "dates",                         "date"), \
  88         _('A', "author",                        "author"), \
  89         _('~', "graphics",                      "line-graphics"), \
  90         _('g', "revision graph",                "commit-title-graph"), \
  91         _('#', "file names",                    "file-name"), \
  92         _('*', "file sizes",                    "file-size"), \
  93         _('W', "space changes",                 "ignore-space"), \
  94         _('l', "commit order",                  "commit-order"), \
  95         _('F', "reference display",             "commit-title-refs"), \
  96         _('C', "local change display",          "show-changes"), \
  97         _('X', "commit ID display",             "id"), \
  98         _('%', "file filtering",                "file-filter"), \
  99         _('$', "commit title overflow display", "commit-title-overflow"), \
 100         _('d', "untracked directory info",      "status-untracked-dirs"), \
 101         _('|', "view split",                    "vertical-split"), \
 102
 103 static void
 104 toggle_option(struct view *view)
 105 {
 106         const struct menu_item menu[] = {
 107 #define DEFINE_TOGGLE_MENU(key, help, name) { key, help, name }
 108                 TOGGLE_MENU_INFO(DEFINE_TOGGLE_MENU)
 109                 { 0 }
 110         };
 111         const char *toggle_argv[] = { "toggle", NULL, NULL };
 112         int i = 0;
 113
 114         if (!prompt_menu("Toggle option", menu, &i))
 115                 return;
 116
 117         toggle_argv[1] = menu[i].data;
 118         run_prompt_command(view, toggle_argv);
 119 }
 120
 121
 122 /*
 123  * View opening
 124  */
 125
 126 static enum request
 127 open_run_request(struct view *view, enum request request)
 128 {
 129         struct run_request *req = get_run_request(request);
 130         const char **argv = NULL;
 131         bool confirmed = FALSE;
 132
 133         request = REQ_NONE;
 134
 135         if (!req) {
 136                 report("Unknown run request");
 137                 return request;
 138         }
 139
 140         if (!argv_format(view->env, &argv, req->argv, FALSE, TRUE)) {
 141                 report("Failed to format arguments");
 142                 return REQ_NONE;
 143         }
 144
 145         if (req->flags.internal) {
 146                 request = run_prompt_command(view, argv);
 147
 148         } else {
 149                 confirmed = !req->flags.confirm;
 150
 151                 if (req->flags.confirm) {
 152                         char cmd[SIZEOF_STR], prompt[SIZEOF_STR];
 153                         const char *and_exit = req->flags.exit ? " and exit" : "";
 154
 155                         if (argv_to_string(argv, cmd, sizeof(cmd), " ") &&
 156                             string_format(prompt, "Run `%s`%s?", cmd, and_exit) &&
 157                             prompt_yesno(prompt)) {
 158                                 confirmed = TRUE;
 159                         }
 160                 }
 161
 162                 if (confirmed && argv_remove_quotes(argv)) {
 163                         if (req->flags.silent)
 164                                 io_run_bg(argv);
 165                         else
 166                                 open_external_viewer(argv, NULL, !req->flags.exit, "");
 167                 }
 168         }
 169
 170         if (argv)
 171                 argv_free(argv);
 172         free(argv);
 173
 174         if (request == REQ_NONE) {
 175                 if (req->flags.confirm && !confirmed)
 176                         request = REQ_NONE;
 177
 178                 else if (req->flags.exit)
 179                         request = REQ_QUIT;
 180
 181                 else if (!req->flags.internal && view_has_flags(view, VIEW_REFRESH) && !view->unrefreshable)
 182                         request = REQ_REFRESH;
 183         }
 184         return request;
 185 }
 186
 187 /*
 188  * User request switch noodle
 189  */
 190
 191 static int
 192 view_driver(struct view *view, enum request request)
 193 {
 194         int i;
 195
 196         if (request == REQ_NONE)
 197                 return TRUE;
 198
 199         if (request >= REQ_RUN_REQUESTS) {
 200                 request = open_run_request(view, request);
 201
 202                 // exit quickly rather than going through view_request and back
 203                 if (request == REQ_QUIT)
 204                         return FALSE;
 205         }
 206
 207         request = view_request(view, request);
 208         if (request == REQ_NONE)
 209                 return TRUE;
 210
 211         switch (request) {
 212         case REQ_MOVE_UP:
 213         case REQ_MOVE_DOWN:
 214         case REQ_MOVE_PAGE_UP:
 215         case REQ_MOVE_PAGE_DOWN:
 216         case REQ_MOVE_FIRST_LINE:
 217         case REQ_MOVE_LAST_LINE:
 218                 move_view(view, request);
 219                 break;
 220
 221         case REQ_SCROLL_FIRST_COL:
 222         case REQ_SCROLL_LEFT:
 223         case REQ_SCROLL_RIGHT:
 224         case REQ_SCROLL_LINE_DOWN:
 225         case REQ_SCROLL_LINE_UP:
 226         case REQ_SCROLL_PAGE_DOWN:
 227         case REQ_SCROLL_PAGE_UP:
 228         case REQ_SCROLL_WHEEL_DOWN:
 229         case REQ_SCROLL_WHEEL_UP:
 230                 scroll_view(view, request);
 231                 break;
 232
 233         case REQ_VIEW_GREP:
 234                 open_grep_view(view);
 235                 break;
 236
 237         case REQ_VIEW_MAIN:
 238                 open_main_view(view, OPEN_DEFAULT);
 239                 break;
 240         case REQ_VIEW_DIFF:
 241                 open_diff_view(view, OPEN_DEFAULT);
 242                 break;
 243         case REQ_VIEW_LOG:
 244                 open_log_view(view, OPEN_DEFAULT);
 245                 break;
 246         case REQ_VIEW_TREE:
 247                 open_tree_view(view, OPEN_DEFAULT);
 248                 break;
 249         case REQ_VIEW_HELP:
 250                 open_help_view(view, OPEN_DEFAULT);
 251                 break;
 252         case REQ_VIEW_REFS:
 253                 open_refs_view(view, OPEN_DEFAULT);
 254                 break;
 255         case REQ_VIEW_BLAME:
 256                 open_blame_view(view, OPEN_DEFAULT);
 257                 break;
 258         case REQ_VIEW_BLOB:
 259                 open_blob_view(view, OPEN_DEFAULT);
 260                 break;
 261         case REQ_VIEW_STATUS:
 262                 open_status_view(view, OPEN_DEFAULT);
 263                 break;
 264         case REQ_VIEW_STAGE:
 265                 open_stage_view(view, NULL, 0, OPEN_DEFAULT);
 266                 break;
 267         case REQ_VIEW_PAGER:
 268                 open_pager_view(view, OPEN_DEFAULT);
 269                 break;
 270         case REQ_VIEW_STASH:
 271                 open_stash_view(view, OPEN_DEFAULT);
 272                 break;
 273
 274         case REQ_NEXT:
 275         case REQ_PREVIOUS:
 276                 if (view->parent) {
 277                         int line;
 278
 279                         view = view->parent;
 280                         line = view->pos.lineno;
 281                         view_request(view, request);
 282                         move_view(view, request);
 283                         if (view_is_displayed(view))
 284                                 update_view_title(view);
 285                         if (line != view->pos.lineno)
 286                                 view_request(view, REQ_ENTER);
 287                 } else {
 288                         move_view(view, request);
 289                 }
 290                 break;
 291
 292         case REQ_VIEW_NEXT:
 293         {
 294                 int nviews = displayed_views();
 295                 int next_view = (current_view + 1) % nviews;
 296
 297                 if (next_view == current_view) {
 298                         report("Only one view is displayed");
 299                         break;
 300                 }
 301
 302                 current_view = next_view;
 303                 /* Blur out the title of the previous view. */
 304                 update_view_title(view);
 305                 report_clear();
 306                 break;
 307         }
 308         case REQ_REFRESH:
 309                 report("Refreshing is not supported by the %s view", view->name);
 310                 break;
 311
 312         case REQ_PARENT:
 313                 report("Moving to parent is not supported by the the %s view", view->name);
 314                 break;
 315
 316         case REQ_BACK:
 317                 report("Going back is not supported for by %s view", view->name);
 318                 break;
 319
 320         case REQ_MAXIMIZE:
 321                 if (displayed_views() == 2)
 322                         maximize_view(view, TRUE);
 323                 break;
 324
 325         case REQ_OPTIONS:
 326                 toggle_option(view);
 327                 break;
 328
 329         case REQ_SEARCH:
 330         case REQ_SEARCH_BACK:
 331                 search_view(view, request);
 332                 break;
 333
 334         case REQ_FIND_NEXT:
 335         case REQ_FIND_PREV:
 336                 find_next(view, request);
 337                 break;
 338
 339         case REQ_STOP_LOADING:
 340                 foreach_view(view, i) {
 341                         if (view->pipe)
 342                                 report("Stopped loading the %s view", view->name),
 343                         end_update(view, TRUE);
 344                 }
 345                 break;
 346
 347         case REQ_SHOW_VERSION:
 348                 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
 349                 return TRUE;
 350
 351         case REQ_SCREEN_REDRAW:
 352                 redraw_display(TRUE);
 353                 break;
 354
 355         case REQ_EDIT:
 356                 report("Nothing to edit");
 357                 break;
 358
 359         case REQ_ENTER:
 360                 report("Nothing to enter");
 361                 break;
 362
 363         case REQ_VIEW_CLOSE:
 364                 /* XXX: Mark closed views by letting view->prev point to the
 365                  * view itself. Parents to closed view should never be
 366                  * followed. */
 367                 if (view->prev && view->prev != view) {
 368                         maximize_view(view->prev, TRUE);
 369                         view->prev = view;
 370                         break;
 371                 }
 372                 /* Fall-through */
 373         case REQ_QUIT:
 374                 return FALSE;
 375
 376         default:
 377                 report("Unknown key, press %s for help",
 378                        get_view_key(view, REQ_VIEW_HELP));
 379                 return TRUE;
 380         }
 381
 382         return TRUE;
 383 }
 384
 385 /*
 386  * Main
 387  */
 388
 389 static const char usage_string[] =
 390 "tig " TIG_VERSION " (" __DATE__ ")\n"
 391 "\n"
 392 "Usage: tig        [options] [revs] [--] [paths]\n"
 393 "   or: tig log    [options] [revs] [--] [paths]\n"
 394 "   or: tig show   [options] [revs] [--] [paths]\n"
 395 "   or: tig blame  [options] [rev] [--] path\n"
 396 "   or: tig grep   [options] [pattern]\n"
 397 "   or: tig stash\n"
 398 "   or: tig status\n"
 399 "   or: tig <      [git command output]\n"
 400 "\n"
 401 "Options:\n"
 402 "  +<number>       Select line <number> in the first view\n"
 403 "  -v, --version   Show version and exit\n"
 404 "  -h, --help      Show help message and exit";
 405
 406 void
 407 usage(const char *message)
 408 {
 409         die("%s\n\n%s", message, usage_string);
 410 }
 411
 412 static int
 413 read_filter_args(char *name, size_t namelen, char *value, size_t valuelen, void *data)
 414 {
 415         const char ***filter_args = data;
 416
 417         return argv_append(filter_args, name) ? OK : ERR;
 418 }
 419
 420 static void
 421 filter_rev_parse(const char ***args, const char *arg1, const char *arg2, const char *argv[])
 422 {
 423         const char *rev_parse_argv[SIZEOF_ARG] = { "git", "rev-parse", arg1, arg2 };
 424         const char **all_argv = NULL;
 425
 426         if (!argv_append_array(&all_argv, rev_parse_argv) ||
 427             !argv_append_array(&all_argv, argv) ||
 428             io_run_load(all_argv, "\n", read_filter_args, args) == ERR)
 429                 die("Failed to split arguments");
 430         argv_free(all_argv);
 431         free(all_argv);
 432 }
 433
 434 static void
 435 filter_options(const char *argv[], bool rev_parse)
 436 {
 437         const char **flags = NULL;
 438         int next, flags_pos;
 439
 440         update_options_from_argv(argv);
 441
 442         if (!rev_parse) {
 443                 opt_cmdline_argv = argv;
 444                 return;
 445         }
 446
 447         filter_rev_parse(&opt_file_argv, "--no-revs", "--no-flags", argv);
 448         filter_rev_parse(&flags, "--flags", "--no-revs", argv);
 449
 450         if (flags) {
 451                 for (next = flags_pos = 0; flags && flags[next]; next++) {
 452                         const char *flag = flags[next];
 453
 454                         if (argv_parse_rev_flag(flag, NULL))
 455                                 argv_append(&opt_rev_argv, flag);
 456                         else
 457                                 flags[flags_pos++] = flag;
 458                 }
 459
 460                 flags[flags_pos] = NULL;
 461
 462                 opt_cmdline_argv = flags;
 463         }
 464
 465         filter_rev_parse(&opt_rev_argv, "--symbolic", "--revs-only", argv);
 466 }
 467
 468 static enum request
 469 parse_options(int argc, const char *argv[], bool pager_mode)
 470 {
 471         enum request request;
 472         const char *subcommand;
 473         bool seen_dashdash = FALSE;
 474         bool rev_parse = TRUE;
 475         const char **filter_argv = NULL;
 476         int i;
 477
 478         request = pager_mode ? REQ_VIEW_PAGER : REQ_VIEW_MAIN;
 479
 480         if (argc <= 1)
 481                 return request;
 482
 483         subcommand = argv[1];
 484         if (!strcmp(subcommand, "status")) {
 485                 request = REQ_VIEW_STATUS;
 486
 487         } else if (!strcmp(subcommand, "blame")) {
 488                 request = REQ_VIEW_BLAME;
 489
 490         } else if (!strcmp(subcommand, "grep")) {
 491                 request = REQ_VIEW_GREP;
 492                 rev_parse = FALSE;
 493
 494         } else if (!strcmp(subcommand, "show")) {
 495                 request = REQ_VIEW_DIFF;
 496
 497         } else if (!strcmp(subcommand, "log")) {
 498                 request = REQ_VIEW_LOG;
 499
 500         } else if (!strcmp(subcommand, "stash")) {
 501                 request = REQ_VIEW_STASH;
 502
 503         } else {
 504                 subcommand = NULL;
 505         }
 506
 507         for (i = 1 + !!subcommand; i < argc; i++) {
 508                 const char *opt = argv[i];
 509
 510                 // stop parsing our options after -- and let rev-parse handle the rest
 511                 if (!seen_dashdash) {
 512                         if (!strcmp(opt, "--")) {
 513                                 seen_dashdash = TRUE;
 514                                 continue;
 515
 516                         } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
 517                                 printf("tig version %s\n", TIG_VERSION);
 518                                 exit(EXIT_SUCCESS);
 519
 520                         } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
 521                                 printf("%s\n", usage_string);
 522                                 exit(EXIT_SUCCESS);
 523
 524                         } else if (strlen(opt) >= 2 && *opt == '+' && string_isnumber(opt + 1)) {
 525                                 int lineno = atoi(opt + 1);
 526
 527                                 argv_env.lineno = lineno > 0 ? lineno - 1 : 0;
 528                                 continue;
 529
 530                         }
 531                 }
 532
 533                 if (!argv_append(&filter_argv, opt))
 534                         die("command too long");
 535         }
 536
 537         if (filter_argv)
 538                 filter_options(filter_argv, rev_parse);
 539
 540         return request;
 541 }
 542
 543 static enum request
 544 open_pager_mode(enum request request)
 545 {
 546         if (request == REQ_VIEW_PAGER) {
 547                 /* Detect if the user requested the main view. */
 548                 if (argv_contains(opt_rev_argv, "--stdin")) {
 549                         open_main_view(NULL, OPEN_FORWARD_STDIN);
 550                 } else if (argv_contains(opt_cmdline_argv, "--pretty=raw")) {
 551                         open_main_view(NULL, OPEN_STDIN);
 552                 } else {
 553                         open_pager_view(NULL, OPEN_STDIN);
 554                 }
 555
 556         } else if (request == REQ_VIEW_DIFF) {
 557                 if (argv_contains(opt_rev_argv, "--stdin"))
 558                         open_diff_view(NULL, OPEN_FORWARD_STDIN);
 559                 else
 560                         open_diff_view(NULL, OPEN_STDIN);
 561
 562         } else {
 563                 close(STDIN_FILENO);
 564                 report("Ignoring stdin.");
 565                 return request;
 566         }
 567
 568         return REQ_NONE;
 569 }
 570
 571 #ifdef NCURSES_MOUSE_VERSION
 572 static struct view *
 573 find_clicked_view(MEVENT *event)
 574 {
 575         struct view *view;
 576         int i;
 577
 578         foreach_displayed_view (view, i) {
 579                 int beg_y = 0, beg_x = 0;
 580
 581                 getbegyx(view->win, beg_y, beg_x);
 582
 583                 if (beg_y <= event->y && event->y < beg_y + view->height
 584                     && beg_x <= event->x && event->x < beg_x + view->width) {
 585                         if (i != current_view) {
 586                                 current_view = i;
 587                         }
 588                         return view;
 589                 }
 590         }
 591
 592         return NULL;
 593 }
 594
 595 static enum request
 596 handle_mouse_event(void)
 597 {
 598         MEVENT event;
 599         struct view *view;
 600
 601         if (getmouse(&event) != OK)
 602                 return REQ_NONE;
 603
 604         view = find_clicked_view(&event);
 605         if (!view)
 606                 return REQ_NONE;
 607
 608         if (event.bstate & BUTTON2_PRESSED)
 609                 return REQ_SCROLL_WHEEL_DOWN;
 610
 611         if (event.bstate & BUTTON4_PRESSED)
 612                 return REQ_SCROLL_WHEEL_UP;
 613
 614         if (event.bstate & BUTTON1_PRESSED) {
 615                 if (event.y == view->pos.lineno - view->pos.offset) {
 616                         /* Click is on the same line, perform an "ENTER" */
 617                         return REQ_ENTER;
 618
 619                 } else {
 620                         int y = getbegy(view->win);
 621                         unsigned long lineno = (event.y - y) + view->pos.offset;
 622
 623                         select_view_line(view, lineno);
 624                         update_view_title(view);
 625                         report_clear();
 626                 }
 627         }
 628
 629         return REQ_NONE;
 630 }
 631 #endif
 632
 633 int
 634 main(int argc, const char *argv[])
 635 {
 636         const char *codeset = ENCODING_UTF8;
 637         bool pager_mode = !isatty(STDIN_FILENO);
 638         enum request request = parse_options(argc, argv, pager_mode);
 639         struct view *view;
 640
 641         prompt_init();
 642
 643         if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
 644                 die("Failed to setup signal handler");
 645
 646         if (setlocale(LC_ALL, "")) {
 647                 codeset = nl_langinfo(CODESET);
 648         }
 649
 650         if (load_repo_info() == ERR)
 651                 die("Failed to load repo info.");
 652
 653         if (load_options() == ERR)
 654                 die("Failed to load user config.");
 655
 656         if (load_git_config() == ERR)
 657                 die("Failed to load repo config.");
 658
 659         /* Require a git repository unless when running in pager mode. */
 660         if (!repo.git_dir[0] && request != REQ_VIEW_PAGER)
 661                 die("Not a git repository");
 662
 663         if (codeset && strcmp(codeset, ENCODING_UTF8)) {
 664                 char translit[SIZEOF_STR];
 665
 666                 if (string_format(translit, "%s%s", codeset, ICONV_TRANSLIT))
 667                         opt_iconv_out = iconv_open(translit, ENCODING_UTF8);
 668                 else
 669                         opt_iconv_out = iconv_open(codeset, ENCODING_UTF8);
 670                 if (opt_iconv_out == ICONV_NONE)
 671                         die("Failed to initialize character set conversion");
 672         }
 673
 674         if (load_refs(FALSE) == ERR)
 675                 die("Failed to load refs.");
 676
 677         init_display();
 678
 679         if (pager_mode)
 680                 request = open_pager_mode(request);
 681
 682         while (view_driver(display[current_view], request)) {
 683                 struct key key;
 684                 int key_value = get_input(0, &key, TRUE);
 685
 686 #ifdef NCURSES_MOUSE_VERSION
 687                 if (key_value == KEY_MOUSE) {
 688                         request = handle_mouse_event();
 689                         continue;
 690                 }
 691 #endif
 692
 693                 view = display[current_view];
 694                 request = get_keybinding(view->keymap, &key, 1);
 695
 696                 /* Some low-level request handling. This keeps access to
 697                  * status_win restricted. */
 698                 switch (request) {
 699                 case REQ_NONE:
 700                         report("Unknown key, press %s for help",
 701                                get_view_key(view, REQ_VIEW_HELP));
 702                         break;
 703                 case REQ_PROMPT:
 704                         request = open_prompt(view);
 705                         break;
 706                 case REQ_SEARCH:
 707                 case REQ_SEARCH_BACK:
 708                 {
 709                         const char *prompt = request == REQ_SEARCH ? "/" : "?";
 710                         char *search = read_prompt(prompt);
 711
 712                         if (search)
 713                                 string_ncopy(argv_env.search, search, strlen(search));
 714                         else if (*argv_env.search)
 715                                 request = request == REQ_SEARCH ?
 716                                         REQ_FIND_NEXT :
 717                                         REQ_FIND_PREV;
 718                         else
 719                                 request = REQ_NONE;
 720                         break;
 721                 }
 722                 default:
 723                         break;
 724                 }
 725         }
 726
 727         exit(EXIT_SUCCESS);
 728
 729         return 0;
 730 }
 731
 732 /* vim: set ts=8 sw=8 noexpandtab: */