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