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