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