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