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_blame = ctx.cfg.enable_blame;
  62         ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
  63         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
  64         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
  65         ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
  66         ret->enable_subject_links = ctx.cfg.enable_subject_links;
  67         ret->enable_html_serving = ctx.cfg.enable_html_serving;
  68         ret->max_stats = ctx.cfg.max_stats;
  69         ret->branch_sort = ctx.cfg.branch_sort;
  70         ret->commit_sort = ctx.cfg.commit_sort;
  71         ret->module_link = ctx.cfg.module_link;
  72         ret->readme = ctx.cfg.readme;
  73         ret->mtime = -1;
  74         ret->about_filter = ctx.cfg.about_filter;
  75         ret->commit_filter = ctx.cfg.commit_filter;
  76         ret->source_filter = ctx.cfg.source_filter;
  77         ret->email_filter = ctx.cfg.email_filter;
  78         ret->owner_filter = ctx.cfg.owner_filter;
  79         ret->clone_url = ctx.cfg.clone_url;
  80         ret->submodules.strdup_strings = 1;
  81         ret->hide = ret->ignore = 0;
  82         return ret;
  83 }
  84
  85 struct cgit_repo *cgit_get_repoinfo(const char *url)
  86 {
  87         int i;
  88         struct cgit_repo *repo;
  89
  90         for (i = 0; i < cgit_repolist.count; i++) {
  91                 repo = &cgit_repolist.repos[i];
  92                 if (repo->ignore)
  93                         continue;
  94                 if (!strcmp(repo->url, url))
  95                         return repo;
  96         }
  97         return NULL;
  98 }
  99
 100 void cgit_free_commitinfo(struct commitinfo *info)
 101 {
 102         free(info->author);
 103         free(info->author_email);
 104         free(info->committer);
 105         free(info->committer_email);
 106         free(info->subject);
 107         free(info->msg);
 108         free(info->msg_encoding);
 109         free(info);
 110 }
 111
 112 char *trim_end(const char *str, char c)
 113 {
 114         int len;
 115
 116         if (str == NULL)
 117                 return NULL;
 118         len = strlen(str);
 119         while (len > 0 && str[len - 1] == c)
 120                 len--;
 121         if (len == 0)
 122                 return NULL;
 123         return xstrndup(str, len);
 124 }
 125
 126 char *ensure_end(const char *str, char c)
 127 {
 128         size_t len = strlen(str);
 129         char *result;
 130
 131         if (len && str[len - 1] == c)
 132                 return xstrndup(str, len);
 133
 134         result = xmalloc(len + 2);
 135         memcpy(result, str, len);
 136         result[len] = '/';
 137         result[len + 1] = '\0';
 138         return result;
 139 }
 140
 141 void strbuf_ensure_end(struct strbuf *sb, char c)
 142 {
 143         if (!sb->len || sb->buf[sb->len - 1] != c)
 144                 strbuf_addch(sb, c);
 145 }
 146
 147 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 148 {
 149         size_t size;
 150
 151         if (list->count >= list->alloc) {
 152                 list->alloc += (list->alloc ? list->alloc : 4);
 153                 size = list->alloc * sizeof(struct refinfo *);
 154                 list->refs = xrealloc(list->refs, size);
 155         }
 156         list->refs[list->count++] = ref;
 157 }
 158
 159 static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
 160 {
 161         struct refinfo *ref;
 162
 163         ref = xmalloc(sizeof (struct refinfo));
 164         ref->refname = xstrdup(refname);
 165         ref->object = parse_object(the_repository, oid);
 166         switch (ref->object->type) {
 167         case OBJ_TAG:
 168                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 169                 break;
 170         case OBJ_COMMIT:
 171                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 172                 break;
 173         }
 174         return ref;
 175 }
 176
 177 void cgit_free_taginfo(struct taginfo *tag)
 178 {
 179         if (tag->tagger)
 180                 free(tag->tagger);
 181         if (tag->tagger_email)
 182                 free(tag->tagger_email);
 183         if (tag->msg)
 184                 free(tag->msg);
 185         free(tag);
 186 }
 187
 188 static void cgit_free_refinfo(struct refinfo *ref)
 189 {
 190         if (ref->refname)
 191                 free((char *)ref->refname);
 192         switch (ref->object->type) {
 193         case OBJ_TAG:
 194                 cgit_free_taginfo(ref->tag);
 195                 break;
 196         case OBJ_COMMIT:
 197                 cgit_free_commitinfo(ref->commit);
 198                 break;
 199         }
 200         free(ref);
 201 }
 202
 203 void cgit_free_reflist_inner(struct reflist *list)
 204 {
 205         int i;
 206
 207         for (i = 0; i < list->count; i++) {
 208                 cgit_free_refinfo(list->refs[i]);
 209         }
 210         free(list->refs);
 211 }
 212
 213 int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
 214                   void *cb_data)
 215 {
 216         struct reflist *list = (struct reflist *)cb_data;
 217         struct refinfo *info = cgit_mk_refinfo(refname, oid);
 218
 219         if (info)
 220                 cgit_add_ref(list, info);
 221         return 0;
 222 }
 223
 224 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 225                        struct diff_options *options, void *data)
 226 {
 227         int i;
 228
 229         for (i = 0; i < q->nr; i++) {
 230                 if (q->queue[i]->status == 'U')
 231                         continue;
 232                 ((filepair_fn)data)(q->queue[i]);
 233         }
 234 }
 235
 236 static int load_mmfile(mmfile_t *file, const struct object_id *oid)
 237 {
 238         enum object_type type;
 239
 240         if (is_null_oid(oid)) {
 241                 file->ptr = (char *)"";
 242                 file->size = 0;
 243         } else {
 244                 file->ptr = read_object_file(oid, &type,
 245                                            (unsigned long *)&file->size);
 246         }
 247         return 1;
 248 }
 249
 250 /*
 251  * Receive diff-buffers from xdiff and concatenate them as
 252  * needed across multiple callbacks.
 253  *
 254  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 255  * ripped from git and modified to use globals instead of
 256  * a special callback-struct.
 257  */
 258 static char *diffbuf = NULL;
 259 static int buflen = 0;
 260
 261 static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 262 {
 263         int i;
 264
 265         for (i = 0; i < nbuf; i++) {
 266                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 267                         /* Incomplete line */
 268                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 269                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 270                         buflen += mb[i].size;
 271                         continue;
 272                 }
 273
 274                 /* we have a complete line */
 275                 if (!diffbuf) {
 276                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 277                         continue;
 278                 }
 279                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 280                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 281                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 282                 free(diffbuf);
 283                 diffbuf = NULL;
 284                 buflen = 0;
 285         }
 286         if (diffbuf) {
 287                 ((linediff_fn)priv)(diffbuf, buflen);
 288                 free(diffbuf);
 289                 diffbuf = NULL;
 290                 buflen = 0;
 291         }
 292         return 0;
 293 }
 294
 295 int cgit_diff_files(const struct object_id *old_oid,
 296                     const struct object_id *new_oid, unsigned long *old_size,
 297                     unsigned long *new_size, int *binary, int context,
 298                     int ignorews, linediff_fn fn)
 299 {
 300         mmfile_t file1, file2;
 301         xpparam_t diff_params;
 302         xdemitconf_t emit_params;
 303         xdemitcb_t emit_cb;
 304
 305         if (!load_mmfile(&file1, old_oid) || !load_mmfile(&file2, new_oid))
 306                 return 1;
 307
 308         *old_size = file1.size;
 309         *new_size = file2.size;
 310
 311         if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
 312             (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
 313                 *binary = 1;
 314                 if (file1.size)
 315                         free(file1.ptr);
 316                 if (file2.size)
 317                         free(file2.ptr);
 318                 return 0;
 319         }
 320
 321         memset(&diff_params, 0, sizeof(diff_params));
 322         memset(&emit_params, 0, sizeof(emit_params));
 323         memset(&emit_cb, 0, sizeof(emit_cb));
 324         diff_params.flags = XDF_NEED_MINIMAL;
 325         if (ignorews)
 326                 diff_params.flags |= XDF_IGNORE_WHITESPACE;
 327         emit_params.ctxlen = context > 0 ? context : 3;
 328         emit_params.flags = XDL_EMIT_FUNCNAMES;
 329         emit_cb.out_line = filediff_cb;
 330         emit_cb.priv = fn;
 331         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 332         if (file1.size)
 333                 free(file1.ptr);
 334         if (file2.size)
 335                 free(file2.ptr);
 336         return 0;
 337 }
 338
 339 void cgit_diff_tree(const struct object_id *old_oid,
 340                     const struct object_id *new_oid,
 341                     filepair_fn fn, const char *prefix, int ignorews)
 342 {
 343         struct diff_options opt;
 344         struct pathspec_item item;
 345
 346         memset(&item, 0, sizeof(item));
 347         diff_setup(&opt);
 348         opt.output_format = DIFF_FORMAT_CALLBACK;
 349         opt.detect_rename = 1;
 350         opt.rename_limit = ctx.cfg.renamelimit;
 351         opt.flags.recursive = 1;
 352         if (ignorews)
 353                 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
 354         opt.format_callback = cgit_diff_tree_cb;
 355         opt.format_callback_data = fn;
 356         if (prefix) {
 357                 item.match = xstrdup(prefix);
 358                 item.len = strlen(prefix);
 359                 opt.pathspec.nr = 1;
 360                 opt.pathspec.items = &item;
 361         }
 362         diff_setup_done(&opt);
 363
 364         if (old_oid && !is_null_oid(old_oid))
 365                 diff_tree_oid(old_oid, new_oid, "", &opt);
 366         else
 367                 diff_root_tree_oid(new_oid, "", &opt);
 368         diffcore_std(&opt);
 369         diff_flush(&opt);
 370
 371         free(item.match);
 372 }
 373
 374 void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
 375 {
 376         const struct object_id *old_oid = NULL;
 377
 378         if (commit->parents)
 379                 old_oid = &commit->parents->item->object.oid;
 380         cgit_diff_tree(old_oid, &commit->object.oid, fn, prefix,
 381                        ctx.qry.ignorews);
 382 }
 383
 384 int cgit_parse_snapshots_mask(const char *str)
 385 {
 386         struct string_list tokens = STRING_LIST_INIT_DUP;
 387         struct string_list_item *item;
 388         const struct cgit_snapshot_format *f;
 389         int rv = 0;
 390
 391         /* favor legacy setting */
 392         if (atoi(str))
 393                 return 1;
 394
 395         if (strcmp(str, "all") == 0)
 396                 return INT_MAX;
 397
 398         string_list_split(&tokens, str, ' ', -1);
 399         string_list_remove_empty_items(&tokens, 0);
 400
 401         for_each_string_list_item(item, &tokens) {
 402                 for (f = cgit_snapshot_formats; f->suffix; f++) {
 403                         if (!strcmp(item->string, f->suffix) ||
 404                             !strcmp(item->string, f->suffix + 1)) {
 405                                 rv |= cgit_snapshot_format_bit(f);
 406                                 break;
 407                         }
 408                 }
 409         }
 410
 411         string_list_clear(&tokens, 0);
 412         return rv;
 413 }
 414
 415 typedef struct {
 416         char * name;
 417         char * value;
 418 } cgit_env_var;
 419
 420 void cgit_prepare_repo_env(struct cgit_repo * repo)
 421 {
 422         cgit_env_var env_vars[] = {
 423                 { .name = "CGIT_REPO_URL", .value = repo->url },
 424                 { .name = "CGIT_REPO_NAME", .value = repo->name },
 425                 { .name = "CGIT_REPO_PATH", .value = repo->path },
 426                 { .name = "CGIT_REPO_OWNER", .value = repo->owner },
 427                 { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
 428                 { .name = "CGIT_REPO_SECTION", .value = repo->section },
 429                 { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
 430         };
 431         int env_var_count = ARRAY_SIZE(env_vars);
 432         cgit_env_var *p, *q;
 433         static char *warn = "cgit warning: failed to set env: %s=%s\n";
 434
 435         p = env_vars;
 436         q = p + env_var_count;
 437         for (; p < q; p++)
 438                 if (p->value && setenv(p->name, p->value, 1))
 439                         fprintf(stderr, warn, p->name, p->value);
 440 }
 441
 442 /* Read the content of the specified file into a newly allocated buffer,
 443  * zeroterminate the buffer and return 0 on success, errno otherwise.
 444  */
 445 int readfile(const char *path, char **buf, size_t *size)
 446 {
 447         int fd, e;
 448         struct stat st;
 449
 450         fd = open(path, O_RDONLY);
 451         if (fd == -1)
 452                 return errno;
 453         if (fstat(fd, &st)) {
 454                 e = errno;
 455                 close(fd);
 456                 return e;
 457         }
 458         if (!S_ISREG(st.st_mode)) {
 459                 close(fd);
 460                 return EISDIR;
 461         }
 462         *buf = xmalloc(st.st_size + 1);
 463         *size = read_in_full(fd, *buf, st.st_size);
 464         e = errno;
 465         (*buf)[*size] = '\0';
 466         close(fd);
 467         return (*size == st.st_size ? 0 : e);
 468 }
 469
 470 static int is_token_char(char c)
 471 {
 472         return isalnum(c) || c == '_';
 473 }
 474
 475 /* Replace name with getenv(name), return pointer to zero-terminating char
 476  */
 477 static char *expand_macro(char *name, int maxlength)
 478 {
 479         char *value;
 480         size_t len;
 481
 482         len = 0;
 483         value = getenv(name);
 484         if (value) {
 485                 len = strlen(value) + 1;
 486                 if (len > maxlength)
 487                         len = maxlength;
 488                 strlcpy(name, value, len);
 489                 --len;
 490         }
 491         return name + len;
 492 }
 493
 494 #define EXPBUFSIZE (1024 * 8)
 495
 496 /* Replace all tokens prefixed by '$' in the specified text with the
 497  * value of the named environment variable.
 498  * NB: the return value is a static buffer, i.e. it must be strdup'd
 499  * by the caller.
 500  */
 501 char *expand_macros(const char *txt)
 502 {
 503         static char result[EXPBUFSIZE];
 504         char *p, *start;
 505         int len;
 506
 507         p = result;
 508         start = NULL;
 509         while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
 510                 *p = *txt;
 511                 if (start) {
 512                         if (!is_token_char(*txt)) {
 513                                 if (p - start > 0) {
 514                                         *p = '\0';
 515                                         len = result + EXPBUFSIZE - start - 1;
 516                                         p = expand_macro(start, len) - 1;
 517                                 }
 518                                 start = NULL;
 519                                 txt--;
 520                         }
 521                         p++;
 522                         txt++;
 523                         continue;
 524                 }
 525                 if (*txt == '$') {
 526                         start = p;
 527                         txt++;
 528                         continue;
 529                 }
 530                 p++;
 531                 txt++;
 532         }
 533         *p = '\0';
 534         if (start && p - start > 0) {
 535                 len = result + EXPBUFSIZE - start - 1;
 536                 p = expand_macro(start, len);
 537                 *p = '\0';
 538         }
 539         return result;
 540 }
 541
 542 char *get_mimetype_for_filename(const char *filename)
 543 {
 544         char *ext, *mimetype, *token, line[1024], *saveptr;
 545         FILE *file;
 546         struct string_list_item *mime;
 547
 548         if (!filename)
 549                 return NULL;
 550
 551         ext = strrchr(filename, '.');
 552         if (!ext)
 553                 return NULL;
 554         ++ext;
 555         if (!ext[0])
 556                 return NULL;
 557         mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
 558         if (mime)
 559                 return xstrdup(mime->util);
 560
 561         if (!ctx.cfg.mimetype_file)
 562                 return NULL;
 563         file = fopen(ctx.cfg.mimetype_file, "r");
 564         if (!file)
 565                 return NULL;
 566         while (fgets(line, sizeof(line), file)) {
 567                 if (!line[0] || line[0] == '#')
 568                         continue;
 569                 mimetype = strtok_r(line, " \t\r\n", &saveptr);
 570                 while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
 571                         if (!strcasecmp(ext, token)) {
 572                                 fclose(file);
 573                                 return xstrdup(mimetype);
 574                         }
 575                 }
 576         }
 577         fclose(file);
 578         return NULL;
 579 }