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