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