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