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 cgit_repolist cgit_repolist;
  12 struct cgit_context ctx;
  13 int cgit_cmd;
  14
  15 const char *cgit_version = CGIT_VERSION;
  16
  17 int htmlfd = 0;
  18
  19 void cgit_prepare_context(struct cgit_context *ctx)
  20 {
  21         memset(ctx, 0, sizeof(ctx));
  22         ctx->cfg.agefile = "info/web/last-modified";
  23         ctx->cfg.cache_dynamic_ttl = 5;
  24         ctx->cfg.cache_max_create_time = 5;
  25         ctx->cfg.cache_repo_ttl = 5;
  26         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
  27         ctx->cfg.cache_root_ttl = 5;
  28         ctx->cfg.cache_static_ttl = -1;
  29         ctx->cfg.css = "/cgit.css";
  30         ctx->cfg.logo = "/git-logo.png";
  31         ctx->cfg.max_commit_count = 50;
  32         ctx->cfg.max_lock_attempts = 5;
  33         ctx->cfg.max_msg_len = 60;
  34         ctx->cfg.max_repodesc_len = 60;
  35         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
  36         ctx->cfg.renamelimit = -1;
  37         ctx->cfg.robots = "index, nofollow";
  38         ctx->cfg.root_title = "Git repository browser";
  39         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
  40 }
  41
  42 int cgit_get_cmd_index(const char *cmd)
  43 {
  44         static char *cmds[] = {"log", "commit", "diff", "tree", "blob",
  45                                "snapshot", "tag", "refs", "patch", NULL};
  46         int i;
  47
  48         for(i = 0; cmds[i]; i++)
  49                 if (!strcmp(cmd, cmds[i]))
  50                         return i + 1;
  51         return 0;
  52 }
  53
  54 int chk_zero(int result, char *msg)
  55 {
  56         if (result != 0)
  57                 die("%s: %s", msg, strerror(errno));
  58         return result;
  59 }
  60
  61 int chk_positive(int result, char *msg)
  62 {
  63         if (result <= 0)
  64                 die("%s: %s", msg, strerror(errno));
  65         return result;
  66 }
  67
  68 int chk_non_negative(int result, char *msg)
  69 {
  70         if (result < 0)
  71                 die("%s: %s",msg, strerror(errno));
  72         return result;
  73 }
  74
  75 struct cgit_repo *add_repo(const char *url)
  76 {
  77         struct cgit_repo *ret;
  78
  79         if (++cgit_repolist.count > cgit_repolist.length) {
  80                 if (cgit_repolist.length == 0)
  81                         cgit_repolist.length = 8;
  82                 else
  83                         cgit_repolist.length *= 2;
  84                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
  85                                                cgit_repolist.length *
  86                                                sizeof(struct cgit_repo));
  87         }
  88
  89         ret = &cgit_repolist.repos[cgit_repolist.count-1];
  90         ret->url = trim_end(url, '/');
  91         ret->name = ret->url;
  92         ret->path = NULL;
  93         ret->desc = "[no description]";
  94         ret->owner = NULL;
  95         ret->group = ctx.cfg.repo_group;
  96         ret->defbranch = "master";
  97         ret->snapshots = ctx.cfg.snapshots;
  98         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
  99         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
 100         ret->module_link = ctx.cfg.module_link;
 101         ret->readme = NULL;
 102         return ret;
 103 }
 104
 105 struct cgit_repo *cgit_get_repoinfo(const char *url)
 106 {
 107         int i;
 108         struct cgit_repo *repo;
 109
 110         for (i=0; i<cgit_repolist.count; i++) {
 111                 repo = &cgit_repolist.repos[i];
 112                 if (!strcmp(repo->url, url))
 113                         return repo;
 114         }
 115         return NULL;
 116 }
 117
 118 void cgit_global_config_cb(const char *name, const char *value)
 119 {
 120         if (!strcmp(name, "root-title"))
 121                 ctx.cfg.root_title = xstrdup(value);
 122         else if (!strcmp(name, "css"))
 123                 ctx.cfg.css = xstrdup(value);
 124         else if (!strcmp(name, "logo"))
 125                 ctx.cfg.logo = xstrdup(value);
 126         else if (!strcmp(name, "index-header"))
 127                 ctx.cfg.index_header = xstrdup(value);
 128         else if (!strcmp(name, "index-info"))
 129                 ctx.cfg.index_info = xstrdup(value);
 130         else if (!strcmp(name, "logo-link"))
 131                 ctx.cfg.logo_link = xstrdup(value);
 132         else if (!strcmp(name, "module-link"))
 133                 ctx.cfg.module_link = xstrdup(value);
 134         else if (!strcmp(name, "virtual-root")) {
 135                 ctx.cfg.virtual_root = trim_end(value, '/');
 136                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
 137                         ctx.cfg.virtual_root = "";
 138         } else if (!strcmp(name, "nocache"))
 139                 ctx.cfg.nocache = atoi(value);
 140         else if (!strcmp(name, "snapshots"))
 141                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 142         else if (!strcmp(name, "enable-index-links"))
 143                 ctx.cfg.enable_index_links = atoi(value);
 144         else if (!strcmp(name, "enable-log-filecount"))
 145                 ctx.cfg.enable_log_filecount = atoi(value);
 146         else if (!strcmp(name, "enable-log-linecount"))
 147                 ctx.cfg.enable_log_linecount = atoi(value);
 148         else if (!strcmp(name, "cache-root"))
 149                 ctx.cfg.cache_root = xstrdup(value);
 150         else if (!strcmp(name, "cache-root-ttl"))
 151                 ctx.cfg.cache_root_ttl = atoi(value);
 152         else if (!strcmp(name, "cache-repo-ttl"))
 153                 ctx.cfg.cache_repo_ttl = atoi(value);
 154         else if (!strcmp(name, "cache-static-ttl"))
 155                 ctx.cfg.cache_static_ttl = atoi(value);
 156         else if (!strcmp(name, "cache-dynamic-ttl"))
 157                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 158         else if (!strcmp(name, "max-message-length"))
 159                 ctx.cfg.max_msg_len = atoi(value);
 160         else if (!strcmp(name, "max-repodesc-length"))
 161                 ctx.cfg.max_repodesc_len = atoi(value);
 162         else if (!strcmp(name, "max-commit-count"))
 163                 ctx.cfg.max_commit_count = atoi(value);
 164         else if (!strcmp(name, "summary-log"))
 165                 ctx.cfg.summary_log = atoi(value);
 166         else if (!strcmp(name, "summary-branches"))
 167                 ctx.cfg.summary_branches = atoi(value);
 168         else if (!strcmp(name, "summary-tags"))
 169                 ctx.cfg.summary_tags = atoi(value);
 170         else if (!strcmp(name, "agefile"))
 171                 ctx.cfg.agefile = xstrdup(value);
 172         else if (!strcmp(name, "renamelimit"))
 173                 ctx.cfg.renamelimit = atoi(value);
 174         else if (!strcmp(name, "robots"))
 175                 ctx.cfg.robots = xstrdup(value);
 176         else if (!strcmp(name, "clone-prefix"))
 177                 ctx.cfg.clone_prefix = xstrdup(value);
 178         else if (!strcmp(name, "repo.group"))
 179                 ctx.cfg.repo_group = xstrdup(value);
 180         else if (!strcmp(name, "repo.url"))
 181                 ctx.repo = add_repo(value);
 182         else if (!strcmp(name, "repo.name"))
 183                 ctx.repo->name = xstrdup(value);
 184         else if (ctx.repo && !strcmp(name, "repo.path"))
 185                 ctx.repo->path = trim_end(value, '/');
 186         else if (ctx.repo && !strcmp(name, "repo.clone-url"))
 187                 ctx.repo->clone_url = xstrdup(value);
 188         else if (ctx.repo && !strcmp(name, "repo.desc"))
 189                 ctx.repo->desc = xstrdup(value);
 190         else if (ctx.repo && !strcmp(name, "repo.owner"))
 191                 ctx.repo->owner = xstrdup(value);
 192         else if (ctx.repo && !strcmp(name, "repo.defbranch"))
 193                 ctx.repo->defbranch = xstrdup(value);
 194         else if (ctx.repo && !strcmp(name, "repo.snapshots"))
 195                 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 196         else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
 197                 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
 198         else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
 199                 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
 200         else if (ctx.repo && !strcmp(name, "repo.module-link"))
 201                 ctx.repo->module_link= xstrdup(value);
 202         else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
 203                 if (*value == '/')
 204                         ctx.repo->readme = xstrdup(value);
 205                 else
 206                         ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
 207         } else if (!strcmp(name, "include"))
 208                 cgit_read_config(value, cgit_global_config_cb);
 209 }
 210
 211 void cgit_querystring_cb(const char *name, const char *value)
 212 {
 213         if (!strcmp(name,"r")) {
 214                 ctx.qry.repo = xstrdup(value);
 215                 ctx.repo = cgit_get_repoinfo(value);
 216         } else if (!strcmp(name, "p")) {
 217                 ctx.qry.page = xstrdup(value);
 218                 cgit_cmd = cgit_get_cmd_index(value);
 219         } else if (!strcmp(name, "url")) {
 220                 cgit_parse_url(value);
 221         } else if (!strcmp(name, "qt")) {
 222                 ctx.qry.grep = xstrdup(value);
 223         } else if (!strcmp(name, "q")) {
 224                 ctx.qry.search = xstrdup(value);
 225         } else if (!strcmp(name, "h")) {
 226                 ctx.qry.head = xstrdup(value);
 227                 ctx.qry.has_symref = 1;
 228         } else if (!strcmp(name, "id")) {
 229                 ctx.qry.sha1 = xstrdup(value);
 230                 ctx.qry.has_sha1 = 1;
 231         } else if (!strcmp(name, "id2")) {
 232                 ctx.qry.sha2 = xstrdup(value);
 233                 ctx.qry.has_sha1 = 1;
 234         } else if (!strcmp(name, "ofs")) {
 235                 ctx.qry.ofs = atoi(value);
 236         } else if (!strcmp(name, "path")) {
 237                 ctx.qry.path = trim_end(value, '/');
 238         } else if (!strcmp(name, "name")) {
 239                 ctx.qry.name = xstrdup(value);
 240         }
 241 }
 242
 243 void *cgit_free_commitinfo(struct commitinfo *info)
 244 {
 245         free(info->author);
 246         free(info->author_email);
 247         free(info->committer);
 248         free(info->committer_email);
 249         free(info->subject);
 250         free(info->msg);
 251         free(info->msg_encoding);
 252         free(info);
 253         return NULL;
 254 }
 255
 256 int hextoint(char c)
 257 {
 258         if (c >= 'a' && c <= 'f')
 259                 return 10 + c - 'a';
 260         else if (c >= 'A' && c <= 'F')
 261                 return 10 + c - 'A';
 262         else if (c >= '0' && c <= '9')
 263                 return c - '0';
 264         else
 265                 return -1;
 266 }
 267
 268 char *trim_end(const char *str, char c)
 269 {
 270         int len;
 271         char *s, *t;
 272
 273         if (str == NULL)
 274                 return NULL;
 275         t = (char *)str;
 276         len = strlen(t);
 277         while(len > 0 && t[len - 1] == c)
 278                 len--;
 279
 280         if (len == 0)
 281                 return NULL;
 282
 283         c = t[len];
 284         t[len] = '\0';
 285         s = xstrdup(t);
 286         t[len] = c;
 287         return s;
 288 }
 289
 290 char *strlpart(char *txt, int maxlen)
 291 {
 292         char *result;
 293
 294         if (!txt)
 295                 return txt;
 296
 297         if (strlen(txt) <= maxlen)
 298                 return txt;
 299         result = xmalloc(maxlen + 1);
 300         memcpy(result, txt, maxlen - 3);
 301         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 302         result[maxlen] = '\0';
 303         return result;
 304 }
 305
 306 char *strrpart(char *txt, int maxlen)
 307 {
 308         char *result;
 309
 310         if (!txt)
 311                 return txt;
 312
 313         if (strlen(txt) <= maxlen)
 314                 return txt;
 315         result = xmalloc(maxlen + 1);
 316         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 317         result[0] = result[1] = result[2] = '.';
 318         return result;
 319 }
 320
 321 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 322 {
 323         size_t size;
 324
 325         if (list->count >= list->alloc) {
 326                 list->alloc += (list->alloc ? list->alloc : 4);
 327                 size = list->alloc * sizeof(struct refinfo *);
 328                 list->refs = xrealloc(list->refs, size);
 329         }
 330         list->refs[list->count++] = ref;
 331 }
 332
 333 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 334 {
 335         struct refinfo *ref;
 336
 337         ref = xmalloc(sizeof (struct refinfo));
 338         ref->refname = xstrdup(refname);
 339         ref->object = parse_object(sha1);
 340         switch (ref->object->type) {
 341         case OBJ_TAG:
 342                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 343                 break;
 344         case OBJ_COMMIT:
 345                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 346                 break;
 347         }
 348         return ref;
 349 }
 350
 351 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 352                   void *cb_data)
 353 {
 354         struct reflist *list = (struct reflist *)cb_data;
 355         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 356
 357         if (info)
 358                 cgit_add_ref(list, info);
 359         return 0;
 360 }
 361
 362 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 363                        struct diff_options *options, void *data)
 364 {
 365         int i;
 366
 367         for (i = 0; i < q->nr; i++) {
 368                 if (q->queue[i]->status == 'U')
 369                         continue;
 370                 ((filepair_fn)data)(q->queue[i]);
 371         }
 372 }
 373
 374 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 375 {
 376         enum object_type type;
 377
 378         if (is_null_sha1(sha1)) {
 379                 file->ptr = (char *)"";
 380                 file->size = 0;
 381         } else {
 382                 file->ptr = read_sha1_file(sha1, &type,
 383                                            (unsigned long *)&file->size);
 384         }
 385         return 1;
 386 }
 387
 388 /*
 389  * Receive diff-buffers from xdiff and concatenate them as
 390  * needed across multiple callbacks.
 391  *
 392  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 393  * ripped from git and modified to use globals instead of
 394  * a special callback-struct.
 395  */
 396 char *diffbuf = NULL;
 397 int buflen = 0;
 398
 399 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 400 {
 401         int i;
 402
 403         for (i = 0; i < nbuf; i++) {
 404                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 405                         /* Incomplete line */
 406                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 407                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 408                         buflen += mb[i].size;
 409                         continue;
 410                 }
 411
 412                 /* we have a complete line */
 413                 if (!diffbuf) {
 414                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 415                         continue;
 416                 }
 417                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 418                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 419                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 420                 free(diffbuf);
 421                 diffbuf = NULL;
 422                 buflen = 0;
 423         }
 424         if (diffbuf) {
 425                 ((linediff_fn)priv)(diffbuf, buflen);
 426                 free(diffbuf);
 427                 diffbuf = NULL;
 428                 buflen = 0;
 429         }
 430         return 0;
 431 }
 432
 433 int cgit_diff_files(const unsigned char *old_sha1,
 434                      const unsigned char *new_sha1,
 435                      linediff_fn fn)
 436 {
 437         mmfile_t file1, file2;
 438         xpparam_t diff_params;
 439         xdemitconf_t emit_params;
 440         xdemitcb_t emit_cb;
 441
 442         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 443                 return 1;
 444
 445         diff_params.flags = XDF_NEED_MINIMAL;
 446         emit_params.ctxlen = 3;
 447         emit_params.flags = XDL_EMIT_FUNCNAMES;
 448         emit_params.find_func = NULL;
 449         emit_cb.outf = filediff_cb;
 450         emit_cb.priv = fn;
 451         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 452         return 0;
 453 }
 454
 455 void cgit_diff_tree(const unsigned char *old_sha1,
 456                     const unsigned char *new_sha1,
 457                     filepair_fn fn, const char *prefix)
 458 {
 459         struct diff_options opt;
 460         int ret;
 461         int prefixlen;
 462
 463         diff_setup(&opt);
 464         opt.output_format = DIFF_FORMAT_CALLBACK;
 465         opt.detect_rename = 1;
 466         opt.rename_limit = ctx.cfg.renamelimit;
 467         DIFF_OPT_SET(&opt, RECURSIVE);
 468         opt.format_callback = cgit_diff_tree_cb;
 469         opt.format_callback_data = fn;
 470         if (prefix) {
 471                 opt.nr_paths = 1;
 472                 opt.paths = &prefix;
 473                 prefixlen = strlen(prefix);
 474                 opt.pathlens = &prefixlen;
 475         }
 476         diff_setup_done(&opt);
 477
 478         if (old_sha1 && !is_null_sha1(old_sha1))
 479                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 480         else
 481                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 482         diffcore_std(&opt);
 483         diff_flush(&opt);
 484 }
 485
 486 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 487 {
 488         unsigned char *old_sha1 = NULL;
 489
 490         if (commit->parents)
 491                 old_sha1 = commit->parents->item->object.sha1;
 492         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 493 }