ui-log.c

   1 /* ui-log.c: functions for log output
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "ui-log.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13 #include "argv-array.h"
  14
  15 static int files, add_lines, rem_lines, lines_counted;
  16
  17 /*
  18  * The list of available column colors in the commit graph.
  19  */
  20 static const char *column_colors_html[] = {
  21         "<span class='column1'>",
  22         "<span class='column2'>",
  23         "<span class='column3'>",
  24         "<span class='column4'>",
  25         "<span class='column5'>",
  26         "<span class='column6'>",
  27         "</span>",
  28 };
  29
  30 #define COLUMN_COLORS_HTML_MAX (ARRAY_SIZE(column_colors_html) - 1)
  31
  32 static void count_lines(char *line, int size)
  33 {
  34         if (size <= 0)
  35                 return;
  36
  37         if (line[0] == '+')
  38                 add_lines++;
  39
  40         else if (line[0] == '-')
  41                 rem_lines++;
  42 }
  43
  44 static void inspect_files(struct diff_filepair *pair)
  45 {
  46         unsigned long old_size = 0;
  47         unsigned long new_size = 0;
  48         int binary = 0;
  49
  50         files++;
  51         if (ctx.repo->enable_log_linecount)
  52                 cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
  53                                 &new_size, &binary, 0, ctx.qry.ignorews,
  54                                 count_lines);
  55 }
  56
  57 void show_commit_decorations(struct commit *commit)
  58 {
  59         const struct name_decoration *deco;
  60         static char buf[1024];
  61
  62         buf[sizeof(buf) - 1] = 0;
  63         deco = get_name_decoration(&commit->object);
  64         html("<span class='decoration'>");
  65         while (deco) {
  66                 if (starts_with(deco->name, "refs/heads/")) {
  67                         strncpy(buf, deco->name + 11, sizeof(buf) - 1);
  68                         cgit_log_link(buf, NULL, "branch-deco", buf, NULL,
  69                                       ctx.qry.vpath, 0, NULL, NULL,
  70                                       ctx.qry.showmsg, 0);
  71                 }
  72                 else if (starts_with(deco->name, "tag: refs/tags/")) {
  73                         strncpy(buf, deco->name + 15, sizeof(buf) - 1);
  74                         cgit_tag_link(buf, NULL, "tag-deco", buf);
  75                 }
  76                 else if (starts_with(deco->name, "refs/tags/")) {
  77                         strncpy(buf, deco->name + 10, sizeof(buf) - 1);
  78                         cgit_tag_link(buf, NULL, "tag-deco", buf);
  79                 }
  80                 else if (starts_with(deco->name, "refs/remotes/")) {
  81                         if (!ctx.repo->enable_remote_branches)
  82                                 goto next;
  83                         strncpy(buf, deco->name + 13, sizeof(buf) - 1);
  84                         cgit_log_link(buf, NULL, "remote-deco", NULL,
  85                                       oid_to_hex(&commit->object.oid),
  86                                       ctx.qry.vpath, 0, NULL, NULL,
  87                                       ctx.qry.showmsg, 0);
  88                 }
  89                 else {
  90                         strncpy(buf, deco->name, sizeof(buf) - 1);
  91                         cgit_commit_link(buf, NULL, "deco", ctx.qry.head,
  92                                          oid_to_hex(&commit->object.oid),
  93                                          ctx.qry.vpath);
  94                 }
  95 next:
  96                 deco = deco->next;
  97         }
  98         html("</span>");
  99 }
 100
 101 static void handle_rename(struct diff_filepair *pair)
 102 {
 103         /*
 104          * After we have seen a rename, we generate links to the previous
 105          * name of the file so that commit & diff views get fed the path
 106          * that is correct for the commit they are showing, avoiding the
 107          * need to walk the entire history leading back to every commit we
 108          * show in order detect renames.
 109          */
 110         if (0 != strcmp(ctx.qry.vpath, pair->two->path)) {
 111                 free(ctx.qry.vpath);
 112                 ctx.qry.vpath = xstrdup(pair->two->path);
 113         }
 114         inspect_files(pair);
 115 }
 116
 117 static int show_commit(struct commit *commit, struct rev_info *revs)
 118 {
 119         struct commit_list *parents = commit->parents;
 120         struct commit *parent;
 121         int found = 0, saved_fmt;
 122         unsigned saved_flags = revs->diffopt.flags;
 123
 124
 125         /* Always show if we're not in "follow" mode with a single file. */
 126         if (!ctx.qry.follow)
 127                 return 1;
 128
 129         /*
 130          * In "follow" mode, we don't show merges.  This is consistent with
 131          * "git log --follow -- <file>".
 132          */
 133         if (parents && parents->next)
 134                 return 0;
 135
 136         /*
 137          * If this is the root commit, do what rev_info tells us.
 138          */
 139         if (!parents)
 140                 return revs->show_root_diff;
 141
 142         /* When we get here we have precisely one parent. */
 143         parent = parents->item;
 144         /* If we can't parse the commit, let print_commit() report an error. */
 145         if (parse_commit(parent))
 146                 return 1;
 147
 148         files = 0;
 149         add_lines = 0;
 150         rem_lines = 0;
 151
 152         DIFF_OPT_SET(&revs->diffopt, RECURSIVE);
 153         diff_tree_sha1(parent->tree->object.oid.hash,
 154                        commit->tree->object.oid.hash,
 155                        "", &revs->diffopt);
 156         diffcore_std(&revs->diffopt);
 157
 158         found = !diff_queue_is_empty();
 159         saved_fmt = revs->diffopt.output_format;
 160         revs->diffopt.output_format = DIFF_FORMAT_CALLBACK;
 161         revs->diffopt.format_callback = cgit_diff_tree_cb;
 162         revs->diffopt.format_callback_data = handle_rename;
 163         diff_flush(&revs->diffopt);
 164         revs->diffopt.output_format = saved_fmt;
 165         revs->diffopt.flags = saved_flags;
 166
 167         lines_counted = 1;
 168         return found;
 169 }
 170
 171 static void print_commit(struct commit *commit, struct rev_info *revs)
 172 {
 173         struct commitinfo *info;
 174         int columns = revs->graph ? 4 : 3;
 175         struct strbuf graphbuf = STRBUF_INIT;
 176         struct strbuf msgbuf = STRBUF_INIT;
 177
 178         if (ctx.repo->enable_log_filecount)
 179                 columns++;
 180         if (ctx.repo->enable_log_linecount)
 181                 columns++;
 182
 183         if (revs->graph) {
 184                 /* Advance graph until current commit */
 185                 while (!graph_next_line(revs->graph, &graphbuf)) {
 186                         /* Print graph segment in otherwise empty table row */
 187                         html("<tr class='nohover'><td class='commitgraph'>");
 188                         html(graphbuf.buf);
 189                         htmlf("</td><td colspan='%d' /></tr>\n", columns);
 190                         strbuf_setlen(&graphbuf, 0);
 191                 }
 192                 /* Current commit's graph segment is now ready in graphbuf */
 193         }
 194
 195         info = cgit_parse_commit(commit);
 196         htmlf("<tr%s>", ctx.qry.showmsg ? " class='logheader'" : "");
 197
 198         if (revs->graph) {
 199                 /* Print graph segment for current commit */
 200                 html("<td class='commitgraph'>");
 201                 html(graphbuf.buf);
 202                 html("</td>");
 203                 strbuf_setlen(&graphbuf, 0);
 204         }
 205         else {
 206                 html("<td>");
 207                 cgit_print_age(info->committer_date, info->committer_tz, TM_WEEK * 2);
 208                 html("</td>");
 209         }
 210
 211         htmlf("<td%s>", ctx.qry.showmsg ? " class='logsubject'" : "");
 212         if (ctx.qry.showmsg) {
 213                 /* line-wrap long commit subjects instead of truncating them */
 214                 size_t subject_len = strlen(info->subject);
 215
 216                 if (subject_len > ctx.cfg.max_msg_len &&
 217                     ctx.cfg.max_msg_len >= 15) {
 218                         /* symbol for signaling line-wrap (in PAGE_ENCODING) */
 219                         const char wrap_symbol[] = { ' ', 0xE2, 0x86, 0xB5, 0 };
 220                         int i = ctx.cfg.max_msg_len - strlen(wrap_symbol);
 221
 222                         /* Rewind i to preceding space character */
 223                         while (i > 0 && !isspace(info->subject[i]))
 224                                 --i;
 225                         if (!i) /* Oops, zero spaces. Reset i */
 226                                 i = ctx.cfg.max_msg_len - strlen(wrap_symbol);
 227
 228                         /* add remainder starting at i to msgbuf */
 229                         strbuf_add(&msgbuf, info->subject + i, subject_len - i);
 230                         strbuf_trim(&msgbuf);
 231                         strbuf_add(&msgbuf, "\n\n", 2);
 232
 233                         /* Place wrap_symbol at position i in info->subject */
 234                         strcpy(info->subject + i, wrap_symbol);
 235                 }
 236         }
 237         cgit_commit_link(info->subject, NULL, NULL, ctx.qry.head,
 238                          oid_to_hex(&commit->object.oid), ctx.qry.vpath);
 239         show_commit_decorations(commit);
 240         html("</td><td>");
 241         cgit_open_filter(ctx.repo->email_filter, info->author_email, "log");
 242         html_txt(info->author);
 243         cgit_close_filter(ctx.repo->email_filter);
 244
 245         if (revs->graph) {
 246                 html("</td><td>");
 247                 cgit_print_age(info->committer_date, info->committer_tz, TM_WEEK * 2);
 248         }
 249
 250         if (!lines_counted && (ctx.repo->enable_log_filecount ||
 251                                ctx.repo->enable_log_linecount)) {
 252                 files = 0;
 253                 add_lines = 0;
 254                 rem_lines = 0;
 255                 cgit_diff_commit(commit, inspect_files, ctx.qry.vpath);
 256         }
 257
 258         if (ctx.repo->enable_log_filecount)
 259                 htmlf("</td><td>%d", files);
 260         if (ctx.repo->enable_log_linecount)
 261                 htmlf("</td><td>-%d/+%d", rem_lines, add_lines);
 262
 263         html("</td></tr>\n");
 264
 265         if (revs->graph || ctx.qry.showmsg) { /* Print a second table row */
 266                 html("<tr class='nohover'>");
 267
 268                 if (ctx.qry.showmsg) {
 269                         /* Concatenate commit message + notes in msgbuf */
 270                         if (info->msg && *(info->msg)) {
 271                                 strbuf_addstr(&msgbuf, info->msg);
 272                                 strbuf_addch(&msgbuf, '\n');
 273                         }
 274                         format_display_notes(commit->object.oid.hash,
 275                                              &msgbuf, PAGE_ENCODING, 0);
 276                         strbuf_addch(&msgbuf, '\n');
 277                         strbuf_ltrim(&msgbuf);
 278                 }
 279
 280                 if (revs->graph) {
 281                         int lines = 0;
 282
 283                         /* Calculate graph padding */
 284                         if (ctx.qry.showmsg) {
 285                                 /* Count #lines in commit message + notes */
 286                                 const char *p = msgbuf.buf;
 287                                 lines = 1;
 288                                 while ((p = strchr(p, '\n'))) {
 289                                         p++;
 290                                         lines++;
 291                                 }
 292                         }
 293
 294                         /* Print graph padding */
 295                         html("<td class='commitgraph'>");
 296                         while (lines > 0 || !graph_is_commit_finished(revs->graph)) {
 297                                 if (graphbuf.len)
 298                                         html("\n");
 299                                 strbuf_setlen(&graphbuf, 0);
 300                                 graph_next_line(revs->graph, &graphbuf);
 301                                 html(graphbuf.buf);
 302                                 lines--;
 303                         }
 304                         html("</td>\n");
 305                 }
 306                 else
 307                         html("<td/>"); /* Empty 'Age' column */
 308
 309                 /* Print msgbuf into remainder of table row */
 310                 htmlf("<td colspan='%d'%s>\n", columns - (revs->graph ? 1 : 0),
 311                         ctx.qry.showmsg ? " class='logmsg'" : "");
 312                 html_txt(msgbuf.buf);
 313                 html("</td></tr>\n");
 314         }
 315
 316         strbuf_release(&msgbuf);
 317         strbuf_release(&graphbuf);
 318         cgit_free_commitinfo(info);
 319 }
 320
 321 static const char *disambiguate_ref(const char *ref, int *must_free_result)
 322 {
 323         struct object_id oid;
 324         struct strbuf longref = STRBUF_INIT;
 325
 326         strbuf_addf(&longref, "refs/heads/%s", ref);
 327         if (get_sha1(longref.buf, oid.hash) == 0) {
 328                 *must_free_result = 1;
 329                 return strbuf_detach(&longref, NULL);
 330         }
 331
 332         *must_free_result = 0;
 333         strbuf_release(&longref);
 334         return ref;
 335 }
 336
 337 static char *next_token(char **src)
 338 {
 339         char *result;
 340
 341         if (!src || !*src)
 342                 return NULL;
 343         while (isspace(**src))
 344                 (*src)++;
 345         if (!**src)
 346                 return NULL;
 347         result = *src;
 348         while (**src) {
 349                 if (isspace(**src)) {
 350                         **src = '\0';
 351                         (*src)++;
 352                         break;
 353                 }
 354                 (*src)++;
 355         }
 356         return result;
 357 }
 358
 359 void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern,
 360                     char *path, int pager, int commit_graph, int commit_sort)
 361 {
 362         struct rev_info rev;
 363         struct commit *commit;
 364         struct argv_array rev_argv = ARGV_ARRAY_INIT;
 365         int i, columns = commit_graph ? 4 : 3;
 366         int must_free_tip = 0;
 367
 368         /* rev_argv.argv[0] will be ignored by setup_revisions */
 369         argv_array_push(&rev_argv, "log_rev_setup");
 370
 371         if (!tip)
 372                 tip = ctx.qry.head;
 373         tip = disambiguate_ref(tip, &must_free_tip);
 374         argv_array_push(&rev_argv, tip);
 375
 376         if (grep && pattern && *pattern) {
 377                 pattern = xstrdup(pattern);
 378                 if (!strcmp(grep, "grep") || !strcmp(grep, "author") ||
 379                     !strcmp(grep, "committer")) {
 380                         argv_array_pushf(&rev_argv, "--%s=%s", grep, pattern);
 381                 } else if (!strcmp(grep, "range")) {
 382                         char *arg;
 383                         /* Split the pattern at whitespace and add each token
 384                          * as a revision expression. Do not accept other
 385                          * rev-list options. Also, replace the previously
 386                          * pushed tip (it's no longer relevant).
 387                          */
 388                         argv_array_pop(&rev_argv);
 389                         while ((arg = next_token(&pattern))) {
 390                                 if (*arg == '-') {
 391                                         fprintf(stderr, "Bad range expr: %s\n",
 392                                                 arg);
 393                                         break;
 394                                 }
 395                                 argv_array_push(&rev_argv, arg);
 396                         }
 397                 }
 398         }
 399
 400         if (!path || !ctx.cfg.enable_follow_links) {
 401                 /*
 402                  * If we don't have a path, "follow" is a no-op so make sure
 403                  * the variable is set to false to avoid needing to check
 404                  * both this and whether we have a path everywhere.
 405                  */
 406                 ctx.qry.follow = 0;
 407         }
 408
 409         if (commit_graph && !ctx.qry.follow) {
 410                 argv_array_push(&rev_argv, "--graph");
 411                 argv_array_push(&rev_argv, "--color");
 412                 graph_set_column_colors(column_colors_html,
 413                                         COLUMN_COLORS_HTML_MAX);
 414         }
 415
 416         if (commit_sort == 1)
 417                 argv_array_push(&rev_argv, "--date-order");
 418         else if (commit_sort == 2)
 419                 argv_array_push(&rev_argv, "--topo-order");
 420
 421         if (path && ctx.qry.follow)
 422                 argv_array_push(&rev_argv, "--follow");
 423         argv_array_push(&rev_argv, "--");
 424         if (path)
 425                 argv_array_push(&rev_argv, path);
 426
 427         init_revisions(&rev, NULL);
 428         rev.abbrev = DEFAULT_ABBREV;
 429         rev.commit_format = CMIT_FMT_DEFAULT;
 430         rev.verbose_header = 1;
 431         rev.show_root_diff = 0;
 432         rev.ignore_missing = 1;
 433         rev.simplify_history = 1;
 434         setup_revisions(rev_argv.argc, rev_argv.argv, &rev, NULL);
 435         load_ref_decorations(DECORATE_FULL_REFS);
 436         rev.show_decorations = 1;
 437         rev.grep_filter.regflags |= REG_ICASE;
 438
 439         rev.diffopt.detect_rename = 1;
 440         rev.diffopt.rename_limit = ctx.cfg.renamelimit;
 441         if (ctx.qry.ignorews)
 442                 DIFF_XDL_SET(&rev.diffopt, IGNORE_WHITESPACE);
 443
 444         compile_grep_patterns(&rev.grep_filter);
 445         prepare_revision_walk(&rev);
 446
 447         if (pager) {
 448                 cgit_print_layout_start();
 449                 html("<table class='list nowrap'>");
 450         }
 451
 452         html("<tr class='nohover'>");
 453         if (commit_graph)
 454                 html("<th></th>");
 455         else
 456                 html("<th class='left'>Age</th>");
 457         html("<th class='left'>Commit message");
 458         if (pager) {
 459                 html(" (");
 460                 cgit_log_link(ctx.qry.showmsg ? "Collapse" : "Expand", NULL,
 461                               NULL, ctx.qry.head, ctx.qry.sha1,
 462                               ctx.qry.vpath, ctx.qry.ofs, ctx.qry.grep,
 463                               ctx.qry.search, ctx.qry.showmsg ? 0 : 1,
 464                               ctx.qry.follow);
 465                 html(")");
 466         }
 467         html("</th><th class='left'>Author</th>");
 468         if (rev.graph)
 469                 html("<th class='left'>Age</th>");
 470         if (ctx.repo->enable_log_filecount) {
 471                 html("<th class='left'>Files</th>");
 472                 columns++;
 473         }
 474         if (ctx.repo->enable_log_linecount) {
 475                 html("<th class='left'>Lines</th>");
 476                 columns++;
 477         }
 478         html("</tr>\n");
 479
 480         if (ofs<0)
 481                 ofs = 0;
 482
 483         for (i = 0; i < ofs && (commit = get_revision(&rev)) != NULL; /* nop */) {
 484                 if (show_commit(commit, &rev))
 485                         i++;
 486                 free_commit_buffer(commit);
 487                 free_commit_list(commit->parents);
 488                 commit->parents = NULL;
 489         }
 490
 491         for (i = 0; i < cnt && (commit = get_revision(&rev)) != NULL; /* nop */) {
 492                 /*
 493                  * In "follow" mode, we must count the files and lines the
 494                  * first time we invoke diff on a given commit, and we need
 495                  * to do that to see if the commit touches the path we care
 496                  * about, so we do it in show_commit.  Hence we must clear
 497                  * lines_counted here.
 498                  *
 499                  * This has the side effect of avoiding running diff twice
 500                  * when we are both following renames and showing file
 501                  * and/or line counts.
 502                  */
 503                 lines_counted = 0;
 504                 if (show_commit(commit, &rev)) {
 505                         i++;
 506                         print_commit(commit, &rev);
 507                 }
 508                 free_commit_buffer(commit);
 509                 free_commit_list(commit->parents);
 510                 commit->parents = NULL;
 511         }
 512         if (pager) {
 513                 html("</table><ul class='pager'>");
 514                 if (ofs > 0) {
 515                         html("<li>");
 516                         cgit_log_link("[prev]", NULL, NULL, ctx.qry.head,
 517                                       ctx.qry.sha1, ctx.qry.vpath,
 518                                       ofs - cnt, ctx.qry.grep,
 519                                       ctx.qry.search, ctx.qry.showmsg,
 520                                       ctx.qry.follow);
 521                         html("</li>");
 522                 }
 523                 if ((commit = get_revision(&rev)) != NULL) {
 524                         html("<li>");
 525                         cgit_log_link("[next]", NULL, NULL, ctx.qry.head,
 526                                       ctx.qry.sha1, ctx.qry.vpath,
 527                                       ofs + cnt, ctx.qry.grep,
 528                                       ctx.qry.search, ctx.qry.showmsg,
 529                                       ctx.qry.follow);
 530                         html("</li>");
 531                 }
 532                 html("</ul>");
 533                 cgit_print_layout_end();
 534         } else if ((commit = get_revision(&rev)) != NULL) {
 535                 htmlf("<tr class='nohover'><td colspan='%d'>", columns);
 536                 cgit_log_link("[...]", NULL, NULL, ctx.qry.head, NULL,
 537                               ctx.qry.vpath, 0, NULL, NULL, ctx.qry.showmsg,
 538                               ctx.qry.follow);
 539                 html("</td></tr>\n");
 540         }
 541
 542         /* If we allocated tip then it is safe to cast away const. */
 543         if (must_free_tip)
 544                 free((char*) tip);
 545 }