shared.c

   1 /* shared.c: global vars + some callback functions
   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
  11 struct cgit_repolist cgit_repolist;
  12 struct cgit_context ctx;
  13
  14 int chk_zero(int result, char *msg)
  15 {
  16         if (result != 0)
  17                 die_errno("%s", msg);
  18         return result;
  19 }
  20
  21 int chk_positive(int result, char *msg)
  22 {
  23         if (result <= 0)
  24                 die_errno("%s", msg);
  25         return result;
  26 }
  27
  28 int chk_non_negative(int result, char *msg)
  29 {
  30         if (result < 0)
  31                 die_errno("%s", msg);
  32         return result;
  33 }
  34
  35 char *cgit_default_repo_desc = "[no description]";
  36 struct cgit_repo *cgit_add_repo(const char *url)
  37 {
  38         struct cgit_repo *ret;
  39
  40         if (++cgit_repolist.count > cgit_repolist.length) {
  41                 if (cgit_repolist.length == 0)
  42                         cgit_repolist.length = 8;
  43                 else
  44                         cgit_repolist.length *= 2;
  45                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
  46                                                cgit_repolist.length *
  47                                                sizeof(struct cgit_repo));
  48         }
  49
  50         ret = &cgit_repolist.repos[cgit_repolist.count-1];
  51         memset(ret, 0, sizeof(struct cgit_repo));
  52         ret->url = trim_end(url, '/');
  53         ret->name = ret->url;
  54         ret->path = NULL;
  55         ret->desc = cgit_default_repo_desc;
  56         ret->extra_head_content = NULL;
  57         ret->owner = NULL;
  58         ret->homepage = NULL;
  59         ret->section = ctx.cfg.section;
  60         ret->snapshots = ctx.cfg.snapshots;
  61         ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
  62         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
  63         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
  64         ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
  65         ret->enable_subject_links = ctx.cfg.enable_subject_links;
  66         ret->enable_html_serving = ctx.cfg.enable_html_serving;
  67         ret->max_stats = ctx.cfg.max_stats;
  68         ret->branch_sort = ctx.cfg.branch_sort;
  69         ret->commit_sort = ctx.cfg.commit_sort;
  70         ret->module_link = ctx.cfg.module_link;
  71         ret->readme = ctx.cfg.readme;
  72         ret->mtime = -1;
  73         ret->about_filter = ctx.cfg.about_filter;
  74         ret->commit_filter = ctx.cfg.commit_filter;
  75         ret->source_filter = ctx.cfg.source_filter;
  76         ret->email_filter = ctx.cfg.email_filter;
  77         ret->owner_filter = ctx.cfg.owner_filter;
  78         ret->clone_url = ctx.cfg.clone_url;
  79         ret->submodules.strdup_strings = 1;
  80         ret->hide = ret->ignore = 0;
  81         return ret;
  82 }
  83
  84 struct cgit_repo *cgit_get_repoinfo(const char *url)
  85 {
  86         int i;
  87         struct cgit_repo *repo;
  88
  89         for (i = 0; i < cgit_repolist.count; i++) {
  90                 repo = &cgit_repolist.repos[i];
  91                 if (repo->ignore)
  92                         continue;
  93                 if (!strcmp(repo->url, url))
  94                         return repo;
  95         }
  96         return NULL;
  97 }
  98
  99 void cgit_free_commitinfo(struct commitinfo *info)
 100 {
 101         free(info->author);
 102         free(info->author_email);
 103         free(info->committer);
 104         free(info->committer_email);
 105         free(info->subject);
 106         free(info->msg);
 107         free(info->msg_encoding);
 108         free(info);
 109 }
 110
 111 char *trim_end(const char *str, char c)
 112 {
 113         int len;
 114
 115         if (str == NULL)
 116                 return NULL;
 117         len = strlen(str);
 118         while (len > 0 && str[len - 1] == c)
 119                 len--;
 120         if (len == 0)
 121                 return NULL;
 122         return xstrndup(str, len);
 123 }
 124
 125 char *ensure_end(const char *str, char c)
 126 {
 127         size_t len = strlen(str);
 128         char *result;
 129
 130         if (len && str[len - 1] == c)
 131                 return xstrndup(str, len);
 132
 133         result = xmalloc(len + 2);
 134         memcpy(result, str, len);
 135         result[len] = '/';
 136         result[len + 1] = '\0';
 137         return result;
 138 }
 139
 140 void strbuf_ensure_end(struct strbuf *sb, char c)
 141 {
 142         if (!sb->len || sb->buf[sb->len - 1] != c)
 143                 strbuf_addch(sb, c);
 144 }
 145
 146 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 147 {
 148         size_t size;
 149
 150         if (list->count >= list->alloc) {
 151                 list->alloc += (list->alloc ? list->alloc : 4);
 152                 size = list->alloc * sizeof(struct refinfo *);
 153                 list->refs = xrealloc(list->refs, size);
 154         }
 155         list->refs[list->count++] = ref;
 156 }
 157
 158 static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
 159 {
 160         struct refinfo *ref;
 161
 162         ref = xmalloc(sizeof (struct refinfo));
 163         ref->refname = xstrdup(refname);
 164         ref->object = parse_object(oid);
 165         switch (ref->object->type) {
 166         case OBJ_TAG:
 167                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 168                 break;
 169         case OBJ_COMMIT:
 170                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 171                 break;
 172         }
 173         return ref;
 174 }
 175
 176 void cgit_free_taginfo(struct taginfo *tag)
 177 {
 178         if (tag->tagger)
 179                 free(tag->tagger);
 180         if (tag->tagger_email)
 181                 free(tag->tagger_email);
 182         if (tag->msg)
 183                 free(tag->msg);
 184         free(tag);
 185 }
 186
 187 static void cgit_free_refinfo(struct refinfo *ref)
 188 {
 189         if (ref->refname)
 190                 free((char *)ref->refname);
 191         switch (ref->object->type) {
 192         case OBJ_TAG:
 193                 cgit_free_taginfo(ref->tag);
 194                 break;
 195         case OBJ_COMMIT:
 196                 cgit_free_commitinfo(ref->commit);
 197                 break;
 198         }
 199         free(ref);
 200 }
 201
 202 void cgit_free_reflist_inner(struct reflist *list)
 203 {
 204         int i;
 205
 206         for (i = 0; i < list->count; i++) {
 207                 cgit_free_refinfo(list->refs[i]);
 208         }
 209         free(list->refs);
 210 }
 211
 212 int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
 213                   void *cb_data)
 214 {
 215         struct reflist *list = (struct reflist *)cb_data;
 216         struct refinfo *info = cgit_mk_refinfo(refname, oid);
 217
 218         if (info)
 219                 cgit_add_ref(list, info);
 220         return 0;
 221 }
 222
 223 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 224                        struct diff_options *options, void *data)
 225 {
 226         int i;
 227
 228         for (i = 0; i < q->nr; i++) {
 229                 if (q->queue[i]->status == 'U')
 230                         continue;
 231                 ((filepair_fn)data)(q->queue[i]);
 232         }
 233 }
 234
 235 static int load_mmfile(mmfile_t *file, const struct object_id *oid)
 236 {
 237         enum object_type type;
 238
 239         if (is_null_oid(oid)) {
 240                 file->ptr = (char *)"";
 241                 file->size = 0;
 242         } else {
 243                 file->ptr = read_object_file(oid, &type,
 244                                            (unsigned long *)&file->size);
 245         }
 246         return 1;
 247 }
 248
 249 /*
 250  * Receive diff-buffers from xdiff and concatenate them as
 251  * needed across multiple callbacks.
 252  *
 253  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 254  * ripped from git and modified to use globals instead of
 255  * a special callback-struct.
 256  */
 257 static char *diffbuf = NULL;
 258 static int buflen = 0;
 259
 260 static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 261 {
 262         int i;
 263
 264         for (i = 0; i < nbuf; i++) {
 265                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 266                         /* Incomplete line */
 267                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 268                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 269                         buflen += mb[i].size;
 270                         continue;
 271                 }
 272
 273                 /* we have a complete line */
 274                 if (!diffbuf) {
 275                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 276                         continue;
 277                 }
 278                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 279                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 280                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 281                 free(diffbuf);
 282                 diffbuf = NULL;
 283                 buflen = 0;
 284         }
 285         if (diffbuf) {
 286                 ((linediff_fn)priv)(diffbuf, buflen);
 287                 free(diffbuf);
 288                 diffbuf = NULL;
 289                 buflen = 0;
 290         }
 291         return 0;
 292 }
 293
 294 int cgit_diff_files(const struct object_id *old_oid,
 295                     const struct object_id *new_oid, unsigned long *old_size,
 296                     unsigned long *new_size, int *binary, int context,
 297                     int ignorews, linediff_fn fn)
 298 {
 299         mmfile_t file1, file2;
 300         xpparam_t diff_params;
 301         xdemitconf_t emit_params;
 302         xdemitcb_t emit_cb;
 303
 304         if (!load_mmfile(&file1, old_oid) || !load_mmfile(&file2, new_oid))
 305                 return 1;
 306
 307         *old_size = file1.size;
 308         *new_size = file2.size;
 309
 310         if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
 311             (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
 312                 *binary = 1;
 313                 if (file1.size)
 314                         free(file1.ptr);
 315                 if (file2.size)
 316                         free(file2.ptr);
 317                 return 0;
 318         }
 319
 320         memset(&diff_params, 0, sizeof(diff_params));
 321         memset(&emit_params, 0, sizeof(emit_params));
 322         memset(&emit_cb, 0, sizeof(emit_cb));
 323         diff_params.flags = XDF_NEED_MINIMAL;
 324         if (ignorews)
 325                 diff_params.flags |= XDF_IGNORE_WHITESPACE;
 326         emit_params.ctxlen = context > 0 ? context : 3;
 327         emit_params.flags = XDL_EMIT_FUNCNAMES;
 328         emit_cb.outf = filediff_cb;
 329         emit_cb.priv = fn;
 330         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 331         if (file1.size)
 332                 free(file1.ptr);
 333         if (file2.size)
 334                 free(file2.ptr);
 335         return 0;
 336 }
 337
 338 void cgit_diff_tree(const struct object_id *old_oid,
 339                     const struct object_id *new_oid,
 340                     filepair_fn fn, const char *prefix, int ignorews)
 341 {
 342         struct diff_options opt;
 343         struct pathspec_item item;
 344
 345         memset(&item, 0, sizeof(item));
 346         diff_setup(&opt);
 347         opt.output_format = DIFF_FORMAT_CALLBACK;
 348         opt.detect_rename = 1;
 349         opt.rename_limit = ctx.cfg.renamelimit;
 350         opt.flags.recursive = 1;
 351         if (ignorews)
 352                 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
 353         opt.format_callback = cgit_diff_tree_cb;
 354         opt.format_callback_data = fn;
 355         if (prefix) {
 356                 item.match = xstrdup(prefix);
 357                 item.len = strlen(prefix);
 358                 opt.pathspec.nr = 1;
 359                 opt.pathspec.items = &item;
 360         }
 361         diff_setup_done(&opt);
 362
 363         if (old_oid && !is_null_oid(old_oid))
 364                 diff_tree_oid(old_oid, new_oid, "", &opt);
 365         else
 366                 diff_root_tree_oid(new_oid, "", &opt);
 367         diffcore_std(&opt);
 368         diff_flush(&opt);
 369
 370         free(item.match);
 371 }
 372
 373 void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
 374 {
 375         const struct object_id *old_oid = NULL;
 376
 377         if (commit->parents)
 378                 old_oid = &commit->parents->item->object.oid;
 379         cgit_diff_tree(old_oid, &commit->object.oid, fn, prefix,
 380                        ctx.qry.ignorews);
 381 }
 382
 383 int cgit_parse_snapshots_mask(const char *str)
 384 {
 385         struct string_list tokens = STRING_LIST_INIT_DUP;
 386         struct string_list_item *item;
 387         const struct cgit_snapshot_format *f;
 388         int rv = 0;
 389
 390         /* favor legacy setting */
 391         if (atoi(str))
 392                 return 1;
 393
 394         if (strcmp(str, "all") == 0)
 395                 return INT_MAX;
 396
 397         string_list_split(&tokens, str, ' ', -1);
 398         string_list_remove_empty_items(&tokens, 0);
 399
 400         for_each_string_list_item(item, &tokens) {
 401                 for (f = cgit_snapshot_formats; f->suffix; f++) {
 402                         if (!strcmp(item->string, f->suffix) ||
 403                             !strcmp(item->string, f->suffix + 1)) {
 404                                 rv |= cgit_snapshot_format_bit(f);
 405                                 break;
 406                         }
 407                 }
 408         }
 409
 410         string_list_clear(&tokens, 0);
 411         return rv;
 412 }
 413
 414 typedef struct {
 415         char * name;
 416         char * value;
 417 } cgit_env_var;
 418
 419 void cgit_prepare_repo_env(struct cgit_repo * repo)
 420 {
 421         cgit_env_var env_vars[] = {
 422                 { .name = "CGIT_REPO_URL", .value = repo->url },
 423                 { .name = "CGIT_REPO_NAME", .value = repo->name },
 424                 { .name = "CGIT_REPO_PATH", .value = repo->path },
 425                 { .name = "CGIT_REPO_OWNER", .value = repo->owner },
 426                 { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
 427                 { .name = "CGIT_REPO_SECTION", .value = repo->section },
 428                 { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
 429         };
 430         int env_var_count = ARRAY_SIZE(env_vars);
 431         cgit_env_var *p, *q;
 432         static char *warn = "cgit warning: failed to set env: %s=%s\n";
 433
 434         p = env_vars;
 435         q = p + env_var_count;
 436         for (; p < q; p++)
 437                 if (p->value && setenv(p->name, p->value, 1))
 438                         fprintf(stderr, warn, p->name, p->value);
 439 }
 440
 441 /* Read the content of the specified file into a newly allocated buffer,
 442  * zeroterminate the buffer and return 0 on success, errno otherwise.
 443  */
 444 int readfile(const char *path, char **buf, size_t *size)
 445 {
 446         int fd, e;
 447         struct stat st;
 448
 449         fd = open(path, O_RDONLY);
 450         if (fd == -1)
 451                 return errno;
 452         if (fstat(fd, &st)) {
 453                 e = errno;
 454                 close(fd);
 455                 return e;
 456         }
 457         if (!S_ISREG(st.st_mode)) {
 458                 close(fd);
 459                 return EISDIR;
 460         }
 461         *buf = xmalloc(st.st_size + 1);
 462         *size = read_in_full(fd, *buf, st.st_size);
 463         e = errno;
 464         (*buf)[*size] = '\0';
 465         close(fd);
 466         return (*size == st.st_size ? 0 : e);
 467 }
 468
 469 static int is_token_char(char c)
 470 {
 471         return isalnum(c) || c == '_';
 472 }
 473
 474 /* Replace name with getenv(name), return pointer to zero-terminating char
 475  */
 476 static char *expand_macro(char *name, int maxlength)
 477 {
 478         char *value;
 479         size_t len;
 480
 481         len = 0;
 482         value = getenv(name);
 483         if (value) {
 484                 len = strlen(value) + 1;
 485                 if (len > maxlength)
 486                         len = maxlength;
 487                 strlcpy(name, value, len);
 488                 --len;
 489         }
 490         return name + len;
 491 }
 492
 493 #define EXPBUFSIZE (1024 * 8)
 494
 495 /* Replace all tokens prefixed by '$' in the specified text with the
 496  * value of the named environment variable.
 497  * NB: the return value is a static buffer, i.e. it must be strdup'd
 498  * by the caller.
 499  */
 500 char *expand_macros(const char *txt)
 501 {
 502         static char result[EXPBUFSIZE];
 503         char *p, *start;
 504         int len;
 505
 506         p = result;
 507         start = NULL;
 508         while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
 509                 *p = *txt;
 510                 if (start) {
 511                         if (!is_token_char(*txt)) {
 512                                 if (p - start > 0) {
 513                                         *p = '\0';
 514                                         len = result + EXPBUFSIZE - start - 1;
 515                                         p = expand_macro(start, len) - 1;
 516                                 }
 517                                 start = NULL;
 518                                 txt--;
 519                         }
 520                         p++;
 521                         txt++;
 522                         continue;
 523                 }
 524                 if (*txt == '$') {
 525                         start = p;
 526                         txt++;
 527                         continue;
 528                 }
 529                 p++;
 530                 txt++;
 531         }
 532         *p = '\0';
 533         if (start && p - start > 0) {
 534                 len = result + EXPBUFSIZE - start - 1;
 535                 p = expand_macro(start, len);
 536                 *p = '\0';
 537         }
 538         return result;
 539 }
 540
 541 char *get_mimetype_for_filename(const char *filename)
 542 {
 543         char *ext, *mimetype, *token, line[1024], *saveptr;
 544         FILE *file;
 545         struct string_list_item *mime;
 546
 547         if (!filename)
 548                 return NULL;
 549
 550         ext = strrchr(filename, '.');
 551         if (!ext)
 552                 return NULL;
 553         ++ext;
 554         if (!ext[0])
 555                 return NULL;
 556         mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
 557         if (mime)
 558                 return xstrdup(mime->util);
 559
 560         if (!ctx.cfg.mimetype_file)
 561                 return NULL;
 562         file = fopen(ctx.cfg.mimetype_file, "r");
 563         if (!file)
 564                 return NULL;
 565         while (fgets(line, sizeof(line), file)) {
 566                 if (!line[0] || line[0] == '#')
 567                         continue;
 568                 mimetype = strtok_r(line, " \t\r\n", &saveptr);
 569                 while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
 570                         if (!strcasecmp(ext, token)) {
 571                                 fclose(file);
 572                                 return xstrdup(mimetype);
 573                         }
 574                 }
 575         }
 576         fclose(file);
 577         return NULL;
 578 }