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