shared.c

   1 /* shared.c: global vars + some callback functions
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   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 repolist cgit_repolist;
  12 struct repoinfo *cgit_repo;
  13 int cgit_cmd;
  14
  15 const char *cgit_version = CGIT_VERSION;
  16
  17 char *cgit_root_title   = "Git repository browser";
  18 char *cgit_css          = "/cgit.css";
  19 char *cgit_logo         = "/git-logo.png";
  20 char *cgit_index_header = NULL;
  21 char *cgit_index_info   = NULL;
  22 char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
  23 char *cgit_module_link  = "./?repo=%s&page=commit&id=%s";
  24 char *cgit_agefile      = "info/web/last-modified";
  25 char *cgit_virtual_root = NULL;
  26 char *cgit_script_name  = CGIT_SCRIPT_NAME;
  27 char *cgit_cache_root   = CGIT_CACHE_ROOT;
  28 char *cgit_repo_group   = NULL;
  29 char *cgit_robots       = "index, nofollow";
  30 char *cgit_clone_prefix = NULL;
  31
  32 int cgit_nocache               =  0;
  33 int cgit_snapshots             =  0;
  34 int cgit_enable_index_links    =  0;
  35 int cgit_enable_log_filecount  =  0;
  36 int cgit_enable_log_linecount  =  0;
  37 int cgit_max_lock_attempts     =  5;
  38 int cgit_cache_root_ttl        =  5;
  39 int cgit_cache_repo_ttl        =  5;
  40 int cgit_cache_dynamic_ttl     =  5;
  41 int cgit_cache_static_ttl      = -1;
  42 int cgit_cache_max_create_time =  5;
  43 int cgit_summary_log           =  0;
  44 int cgit_summary_tags          =  0;
  45 int cgit_summary_branches      =  0;
  46 int cgit_renamelimit           = -1;
  47
  48 int cgit_max_msg_len = 60;
  49 int cgit_max_repodesc_len = 60;
  50 int cgit_max_commit_count = 50;
  51
  52 int cgit_query_has_symref = 0;
  53 int cgit_query_has_sha1   = 0;
  54
  55 char *cgit_querystring  = NULL;
  56 char *cgit_query_repo   = NULL;
  57 char *cgit_query_page   = NULL;
  58 char *cgit_query_head   = NULL;
  59 char *cgit_query_search = NULL;
  60 char *cgit_query_grep   = NULL;
  61 char *cgit_query_sha1   = NULL;
  62 char *cgit_query_sha2   = NULL;
  63 char *cgit_query_path   = NULL;
  64 char *cgit_query_name   = NULL;
  65 int   cgit_query_ofs    = 0;
  66
  67 int htmlfd = 0;
  68
  69
  70 int cgit_get_cmd_index(const char *cmd)
  71 {
  72         static char *cmds[] = {"log", "commit", "diff", "tree", "blob",
  73                                "snapshot", "tag", "refs", NULL};
  74         int i;
  75
  76         for(i = 0; cmds[i]; i++)
  77                 if (!strcmp(cmd, cmds[i]))
  78                         return i + 1;
  79         return 0;
  80 }
  81
  82 int chk_zero(int result, char *msg)
  83 {
  84         if (result != 0)
  85                 die("%s: %s", msg, strerror(errno));
  86         return result;
  87 }
  88
  89 int chk_positive(int result, char *msg)
  90 {
  91         if (result <= 0)
  92                 die("%s: %s", msg, strerror(errno));
  93         return result;
  94 }
  95
  96 int chk_non_negative(int result, char *msg)
  97 {
  98         if (result < 0)
  99                 die("%s: %s",msg, strerror(errno));
 100         return result;
 101 }
 102
 103 struct repoinfo *add_repo(const char *url)
 104 {
 105         struct repoinfo *ret;
 106
 107         if (++cgit_repolist.count > cgit_repolist.length) {
 108                 if (cgit_repolist.length == 0)
 109                         cgit_repolist.length = 8;
 110                 else
 111                         cgit_repolist.length *= 2;
 112                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
 113                                                cgit_repolist.length *
 114                                                sizeof(struct repoinfo));
 115         }
 116
 117         ret = &cgit_repolist.repos[cgit_repolist.count-1];
 118         ret->url = trim_end(url, '/');
 119         ret->name = ret->url;
 120         ret->path = NULL;
 121         ret->desc = NULL;
 122         ret->owner = NULL;
 123         ret->group = cgit_repo_group;
 124         ret->defbranch = "master";
 125         ret->snapshots = cgit_snapshots;
 126         ret->enable_log_filecount = cgit_enable_log_filecount;
 127         ret->enable_log_linecount = cgit_enable_log_linecount;
 128         ret->module_link = cgit_module_link;
 129         ret->readme = NULL;
 130         return ret;
 131 }
 132
 133 struct repoinfo *cgit_get_repoinfo(const char *url)
 134 {
 135         int i;
 136         struct repoinfo *repo;
 137
 138         for (i=0; i<cgit_repolist.count; i++) {
 139                 repo = &cgit_repolist.repos[i];
 140                 if (!strcmp(repo->url, url))
 141                         return repo;
 142         }
 143         return NULL;
 144 }
 145
 146 void cgit_global_config_cb(const char *name, const char *value)
 147 {
 148         if (!strcmp(name, "root-title"))
 149                 cgit_root_title = xstrdup(value);
 150         else if (!strcmp(name, "css"))
 151                 cgit_css = xstrdup(value);
 152         else if (!strcmp(name, "logo"))
 153                 cgit_logo = xstrdup(value);
 154         else if (!strcmp(name, "index-header"))
 155                 cgit_index_header = xstrdup(value);
 156         else if (!strcmp(name, "index-info"))
 157                 cgit_index_info = xstrdup(value);
 158         else if (!strcmp(name, "logo-link"))
 159                 cgit_logo_link = xstrdup(value);
 160         else if (!strcmp(name, "module-link"))
 161                 cgit_module_link = xstrdup(value);
 162         else if (!strcmp(name, "virtual-root")) {
 163                 cgit_virtual_root = trim_end(value, '/');
 164                 if (!cgit_virtual_root && (!strcmp(value, "/")))
 165                         cgit_virtual_root = "";
 166         } else if (!strcmp(name, "nocache"))
 167                 cgit_nocache = atoi(value);
 168         else if (!strcmp(name, "snapshots"))
 169                 cgit_snapshots = cgit_parse_snapshots_mask(value);
 170         else if (!strcmp(name, "enable-index-links"))
 171                 cgit_enable_index_links = atoi(value);
 172         else if (!strcmp(name, "enable-log-filecount"))
 173                 cgit_enable_log_filecount = atoi(value);
 174         else if (!strcmp(name, "enable-log-linecount"))
 175                 cgit_enable_log_linecount = atoi(value);
 176         else if (!strcmp(name, "cache-root"))
 177                 cgit_cache_root = xstrdup(value);
 178         else if (!strcmp(name, "cache-root-ttl"))
 179                 cgit_cache_root_ttl = atoi(value);
 180         else if (!strcmp(name, "cache-repo-ttl"))
 181                 cgit_cache_repo_ttl = atoi(value);
 182         else if (!strcmp(name, "cache-static-ttl"))
 183                 cgit_cache_static_ttl = atoi(value);
 184         else if (!strcmp(name, "cache-dynamic-ttl"))
 185                 cgit_cache_dynamic_ttl = atoi(value);
 186         else if (!strcmp(name, "max-message-length"))
 187                 cgit_max_msg_len = atoi(value);
 188         else if (!strcmp(name, "max-repodesc-length"))
 189                 cgit_max_repodesc_len = atoi(value);
 190         else if (!strcmp(name, "max-commit-count"))
 191                 cgit_max_commit_count = atoi(value);
 192         else if (!strcmp(name, "summary-log"))
 193                 cgit_summary_log = atoi(value);
 194         else if (!strcmp(name, "summary-branches"))
 195                 cgit_summary_branches = atoi(value);
 196         else if (!strcmp(name, "summary-tags"))
 197                 cgit_summary_tags = atoi(value);
 198         else if (!strcmp(name, "agefile"))
 199                 cgit_agefile = xstrdup(value);
 200         else if (!strcmp(name, "renamelimit"))
 201                 cgit_renamelimit = atoi(value);
 202         else if (!strcmp(name, "robots"))
 203                 cgit_robots = xstrdup(value);
 204         else if (!strcmp(name, "clone-prefix"))
 205                 cgit_clone_prefix = xstrdup(value);
 206         else if (!strcmp(name, "repo.group"))
 207                 cgit_repo_group = xstrdup(value);
 208         else if (!strcmp(name, "repo.url"))
 209                 cgit_repo = add_repo(value);
 210         else if (!strcmp(name, "repo.name"))
 211                 cgit_repo->name = xstrdup(value);
 212         else if (cgit_repo && !strcmp(name, "repo.path"))
 213                 cgit_repo->path = trim_end(value, '/');
 214         else if (cgit_repo && !strcmp(name, "repo.clone-url"))
 215                 cgit_repo->clone_url = xstrdup(value);
 216         else if (cgit_repo && !strcmp(name, "repo.desc"))
 217                 cgit_repo->desc = xstrdup(value);
 218         else if (cgit_repo && !strcmp(name, "repo.owner"))
 219                 cgit_repo->owner = xstrdup(value);
 220         else if (cgit_repo && !strcmp(name, "repo.defbranch"))
 221                 cgit_repo->defbranch = xstrdup(value);
 222         else if (cgit_repo && !strcmp(name, "repo.snapshots"))
 223                 cgit_repo->snapshots = cgit_snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 224         else if (cgit_repo && !strcmp(name, "repo.enable-log-filecount"))
 225                 cgit_repo->enable_log_filecount = cgit_enable_log_filecount * atoi(value);
 226         else if (cgit_repo && !strcmp(name, "repo.enable-log-linecount"))
 227                 cgit_repo->enable_log_linecount = cgit_enable_log_linecount * atoi(value);
 228         else if (cgit_repo && !strcmp(name, "repo.module-link"))
 229                 cgit_repo->module_link= xstrdup(value);
 230         else if (cgit_repo && !strcmp(name, "repo.readme") && value != NULL) {
 231                 if (*value == '/')
 232                         cgit_repo->readme = xstrdup(value);
 233                 else
 234                         cgit_repo->readme = xstrdup(fmt("%s/%s", cgit_repo->path, value));
 235         } else if (!strcmp(name, "include"))
 236                 cgit_read_config(value, cgit_global_config_cb);
 237 }
 238
 239 void cgit_querystring_cb(const char *name, const char *value)
 240 {
 241         if (!strcmp(name,"r")) {
 242                 cgit_query_repo = xstrdup(value);
 243                 cgit_repo = cgit_get_repoinfo(value);
 244         } else if (!strcmp(name, "p")) {
 245                 cgit_query_page = xstrdup(value);
 246                 cgit_cmd = cgit_get_cmd_index(value);
 247         } else if (!strcmp(name, "url")) {
 248                 cgit_parse_url(value);
 249         } else if (!strcmp(name, "qt")) {
 250                 cgit_query_grep = xstrdup(value);
 251         } else if (!strcmp(name, "q")) {
 252                 cgit_query_search = xstrdup(value);
 253         } else if (!strcmp(name, "h")) {
 254                 cgit_query_head = xstrdup(value);
 255                 cgit_query_has_symref = 1;
 256         } else if (!strcmp(name, "id")) {
 257                 cgit_query_sha1 = xstrdup(value);
 258                 cgit_query_has_sha1 = 1;
 259         } else if (!strcmp(name, "id2")) {
 260                 cgit_query_sha2 = xstrdup(value);
 261                 cgit_query_has_sha1 = 1;
 262         } else if (!strcmp(name, "ofs")) {
 263                 cgit_query_ofs = atoi(value);
 264         } else if (!strcmp(name, "path")) {
 265                 cgit_query_path = trim_end(value, '/');
 266         } else if (!strcmp(name, "name")) {
 267                 cgit_query_name = xstrdup(value);
 268         }
 269 }
 270
 271 void *cgit_free_commitinfo(struct commitinfo *info)
 272 {
 273         free(info->author);
 274         free(info->author_email);
 275         free(info->committer);
 276         free(info->committer_email);
 277         free(info->subject);
 278         free(info->msg);
 279         free(info->msg_encoding);
 280         free(info);
 281         return NULL;
 282 }
 283
 284 int hextoint(char c)
 285 {
 286         if (c >= 'a' && c <= 'f')
 287                 return 10 + c - 'a';
 288         else if (c >= 'A' && c <= 'F')
 289                 return 10 + c - 'A';
 290         else if (c >= '0' && c <= '9')
 291                 return c - '0';
 292         else
 293                 return -1;
 294 }
 295
 296 char *trim_end(const char *str, char c)
 297 {
 298         int len;
 299         char *s, *t;
 300
 301         if (str == NULL)
 302                 return NULL;
 303         t = (char *)str;
 304         len = strlen(t);
 305         while(len > 0 && t[len - 1] == c)
 306                 len--;
 307
 308         if (len == 0)
 309                 return NULL;
 310
 311         c = t[len];
 312         t[len] = '\0';
 313         s = xstrdup(t);
 314         t[len] = c;
 315         return s;
 316 }
 317
 318 char *strlpart(char *txt, int maxlen)
 319 {
 320         char *result;
 321
 322         if (!txt)
 323                 return txt;
 324
 325         if (strlen(txt) <= maxlen)
 326                 return txt;
 327         result = xmalloc(maxlen + 1);
 328         memcpy(result, txt, maxlen - 3);
 329         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 330         result[maxlen] = '\0';
 331         return result;
 332 }
 333
 334 char *strrpart(char *txt, int maxlen)
 335 {
 336         char *result;
 337
 338         if (!txt)
 339                 return txt;
 340
 341         if (strlen(txt) <= maxlen)
 342                 return txt;
 343         result = xmalloc(maxlen + 1);
 344         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 345         result[0] = result[1] = result[2] = '.';
 346         return result;
 347 }
 348
 349 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 350 {
 351         size_t size;
 352
 353         if (list->count >= list->alloc) {
 354                 list->alloc += (list->alloc ? list->alloc : 4);
 355                 size = list->alloc * sizeof(struct refinfo *);
 356                 list->refs = xrealloc(list->refs, size);
 357         }
 358         list->refs[list->count++] = ref;
 359 }
 360
 361 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 362 {
 363         struct refinfo *ref;
 364
 365         ref = xmalloc(sizeof (struct refinfo));
 366         ref->refname = xstrdup(refname);
 367         ref->object = parse_object(sha1);
 368         switch (ref->object->type) {
 369         case OBJ_TAG:
 370                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 371                 break;
 372         case OBJ_COMMIT:
 373                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 374                 break;
 375         }
 376         return ref;
 377 }
 378
 379 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 380                   void *cb_data)
 381 {
 382         struct reflist *list = (struct reflist *)cb_data;
 383         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 384
 385         if (info)
 386                 cgit_add_ref(list, info);
 387         return 0;
 388 }
 389
 390 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 391                        struct diff_options *options, void *data)
 392 {
 393         int i;
 394
 395         for (i = 0; i < q->nr; i++) {
 396                 if (q->queue[i]->status == 'U')
 397                         continue;
 398                 ((filepair_fn)data)(q->queue[i]);
 399         }
 400 }
 401
 402 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 403 {
 404         enum object_type type;
 405
 406         if (is_null_sha1(sha1)) {
 407                 file->ptr = (char *)"";
 408                 file->size = 0;
 409         } else {
 410                 file->ptr = read_sha1_file(sha1, &type,
 411                                            (unsigned long *)&file->size);
 412         }
 413         return 1;
 414 }
 415
 416 /*
 417  * Receive diff-buffers from xdiff and concatenate them as
 418  * needed across multiple callbacks.
 419  *
 420  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 421  * ripped from git and modified to use globals instead of
 422  * a special callback-struct.
 423  */
 424 char *diffbuf = NULL;
 425 int buflen = 0;
 426
 427 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 428 {
 429         int i;
 430
 431         for (i = 0; i < nbuf; i++) {
 432                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 433                         /* Incomplete line */
 434                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 435                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 436                         buflen += mb[i].size;
 437                         continue;
 438                 }
 439
 440                 /* we have a complete line */
 441                 if (!diffbuf) {
 442                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 443                         continue;
 444                 }
 445                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 446                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 447                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 448                 free(diffbuf);
 449                 diffbuf = NULL;
 450                 buflen = 0;
 451         }
 452         if (diffbuf) {
 453                 ((linediff_fn)priv)(diffbuf, buflen);
 454                 free(diffbuf);
 455                 diffbuf = NULL;
 456                 buflen = 0;
 457         }
 458         return 0;
 459 }
 460
 461 int cgit_diff_files(const unsigned char *old_sha1,
 462                      const unsigned char *new_sha1,
 463                      linediff_fn fn)
 464 {
 465         mmfile_t file1, file2;
 466         xpparam_t diff_params;
 467         xdemitconf_t emit_params;
 468         xdemitcb_t emit_cb;
 469
 470         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 471                 return 1;
 472
 473         diff_params.flags = XDF_NEED_MINIMAL;
 474         emit_params.ctxlen = 3;
 475         emit_params.flags = XDL_EMIT_FUNCNAMES;
 476         emit_params.find_func = NULL;
 477         emit_cb.outf = filediff_cb;
 478         emit_cb.priv = fn;
 479         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 480         return 0;
 481 }
 482
 483 void cgit_diff_tree(const unsigned char *old_sha1,
 484                     const unsigned char *new_sha1,
 485                     filepair_fn fn, const char *prefix)
 486 {
 487         struct diff_options opt;
 488         int ret;
 489         int prefixlen;
 490
 491         diff_setup(&opt);
 492         opt.output_format = DIFF_FORMAT_CALLBACK;
 493         opt.detect_rename = 1;
 494         opt.rename_limit = cgit_renamelimit;
 495         opt.recursive = 1;
 496         opt.format_callback = cgit_diff_tree_cb;
 497         opt.format_callback_data = fn;
 498         if (prefix) {
 499                 opt.nr_paths = 1;
 500                 opt.paths = &prefix;
 501                 prefixlen = strlen(prefix);
 502                 opt.pathlens = &prefixlen;
 503         }
 504         diff_setup_done(&opt);
 505
 506         if (old_sha1 && !is_null_sha1(old_sha1))
 507                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 508         else
 509                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 510         diffcore_std(&opt);
 511         diff_flush(&opt);
 512 }
 513
 514 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 515 {
 516         unsigned char *old_sha1 = NULL;
 517
 518         if (commit->parents)
 519                 old_sha1 = commit->parents->item->object.sha1;
 520         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 521 }