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   = CGIT_CACHE_ROOT;
  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 int cgit_renamelimit           = -1;
  42
  43 int cgit_max_msg_len = 60;
  44 int cgit_max_repodesc_len = 60;
  45 int cgit_max_commit_count = 50;
  46
  47 int cgit_query_has_symref = 0;
  48 int cgit_query_has_sha1   = 0;
  49
  50 char *cgit_querystring  = NULL;
  51 char *cgit_query_repo   = NULL;
  52 char *cgit_query_page   = NULL;
  53 char *cgit_query_head   = NULL;
  54 char *cgit_query_search = NULL;
  55 char *cgit_query_sha1   = NULL;
  56 char *cgit_query_sha2   = NULL;
  57 char *cgit_query_path   = NULL;
  58 char *cgit_query_name   = NULL;
  59 int   cgit_query_ofs    = 0;
  60
  61 int htmlfd = 0;
  62
  63
  64 int cgit_get_cmd_index(const char *cmd)
  65 {
  66         static char *cmds[] = {"log", "commit", "diff", "tree", "blob",
  67                                "snapshot", "tag", NULL};
  68         int i;
  69
  70         for(i = 0; cmds[i]; i++)
  71                 if (!strcmp(cmd, cmds[i]))
  72                         return i + 1;
  73         return 0;
  74 }
  75
  76 int chk_zero(int result, char *msg)
  77 {
  78         if (result != 0)
  79                 die("%s: %s", msg, strerror(errno));
  80         return result;
  81 }
  82
  83 int chk_positive(int result, char *msg)
  84 {
  85         if (result <= 0)
  86                 die("%s: %s", msg, strerror(errno));
  87         return result;
  88 }
  89
  90 int chk_non_negative(int result, char *msg)
  91 {
  92         if (result < 0)
  93                 die("%s: %s",msg, strerror(errno));
  94         return result;
  95 }
  96
  97 struct repoinfo *add_repo(const char *url)
  98 {
  99         struct repoinfo *ret;
 100
 101         if (++cgit_repolist.count > cgit_repolist.length) {
 102                 if (cgit_repolist.length == 0)
 103                         cgit_repolist.length = 8;
 104                 else
 105                         cgit_repolist.length *= 2;
 106                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
 107                                                cgit_repolist.length *
 108                                                sizeof(struct repoinfo));
 109         }
 110
 111         ret = &cgit_repolist.repos[cgit_repolist.count-1];
 112         ret->url = trim_end(url, '/');
 113         ret->name = ret->url;
 114         ret->path = NULL;
 115         ret->desc = NULL;
 116         ret->owner = NULL;
 117         ret->group = cgit_repo_group;
 118         ret->defbranch = "master";
 119         ret->snapshots = cgit_snapshots;
 120         ret->enable_log_filecount = cgit_enable_log_filecount;
 121         ret->enable_log_linecount = cgit_enable_log_linecount;
 122         ret->module_link = cgit_module_link;
 123         ret->readme = NULL;
 124         return ret;
 125 }
 126
 127 struct repoinfo *cgit_get_repoinfo(const char *url)
 128 {
 129         int i;
 130         struct repoinfo *repo;
 131
 132         for (i=0; i<cgit_repolist.count; i++) {
 133                 repo = &cgit_repolist.repos[i];
 134                 if (!strcmp(repo->url, url))
 135                         return repo;
 136         }
 137         return NULL;
 138 }
 139
 140 void cgit_global_config_cb(const char *name, const char *value)
 141 {
 142         if (!strcmp(name, "root-title"))
 143                 cgit_root_title = xstrdup(value);
 144         else if (!strcmp(name, "css"))
 145                 cgit_css = xstrdup(value);
 146         else if (!strcmp(name, "logo"))
 147                 cgit_logo = xstrdup(value);
 148         else if (!strcmp(name, "index-header"))
 149                 cgit_index_header = xstrdup(value);
 150         else if (!strcmp(name, "logo-link"))
 151                 cgit_logo_link = xstrdup(value);
 152         else if (!strcmp(name, "module-link"))
 153                 cgit_module_link = xstrdup(value);
 154         else if (!strcmp(name, "virtual-root"))
 155                 cgit_virtual_root = trim_end(value, '/');
 156         else if (!strcmp(name, "nocache"))
 157                 cgit_nocache = atoi(value);
 158         else if (!strcmp(name, "snapshots"))
 159                 cgit_snapshots = cgit_parse_snapshots_mask(value);
 160         else if (!strcmp(name, "enable-index-links"))
 161                 cgit_enable_index_links = atoi(value);
 162         else if (!strcmp(name, "enable-log-filecount"))
 163                 cgit_enable_log_filecount = atoi(value);
 164         else if (!strcmp(name, "enable-log-linecount"))
 165                 cgit_enable_log_linecount = atoi(value);
 166         else if (!strcmp(name, "cache-root"))
 167                 cgit_cache_root = xstrdup(value);
 168         else if (!strcmp(name, "cache-root-ttl"))
 169                 cgit_cache_root_ttl = atoi(value);
 170         else if (!strcmp(name, "cache-repo-ttl"))
 171                 cgit_cache_repo_ttl = atoi(value);
 172         else if (!strcmp(name, "cache-static-ttl"))
 173                 cgit_cache_static_ttl = atoi(value);
 174         else if (!strcmp(name, "cache-dynamic-ttl"))
 175                 cgit_cache_dynamic_ttl = atoi(value);
 176         else if (!strcmp(name, "max-message-length"))
 177                 cgit_max_msg_len = atoi(value);
 178         else if (!strcmp(name, "max-repodesc-length"))
 179                 cgit_max_repodesc_len = atoi(value);
 180         else if (!strcmp(name, "max-commit-count"))
 181                 cgit_max_commit_count = atoi(value);
 182         else if (!strcmp(name, "summary-log"))
 183                 cgit_summary_log = atoi(value);
 184         else if (!strcmp(name, "agefile"))
 185                 cgit_agefile = xstrdup(value);
 186         else if (!strcmp(name, "renamelimit"))
 187                 cgit_renamelimit = atoi(value);
 188         else if (!strcmp(name, "repo.group"))
 189                 cgit_repo_group = xstrdup(value);
 190         else if (!strcmp(name, "repo.url"))
 191                 cgit_repo = add_repo(value);
 192         else if (!strcmp(name, "repo.name"))
 193                 cgit_repo->name = xstrdup(value);
 194         else if (cgit_repo && !strcmp(name, "repo.path"))
 195                 cgit_repo->path = trim_end(value, '/');
 196         else if (cgit_repo && !strcmp(name, "repo.desc"))
 197                 cgit_repo->desc = xstrdup(value);
 198         else if (cgit_repo && !strcmp(name, "repo.owner"))
 199                 cgit_repo->owner = xstrdup(value);
 200         else if (cgit_repo && !strcmp(name, "repo.defbranch"))
 201                 cgit_repo->defbranch = xstrdup(value);
 202         else if (cgit_repo && !strcmp(name, "repo.snapshots"))
 203                 cgit_repo->snapshots = cgit_snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 204         else if (cgit_repo && !strcmp(name, "repo.enable-log-filecount"))
 205                 cgit_repo->enable_log_filecount = cgit_enable_log_filecount * atoi(value);
 206         else if (cgit_repo && !strcmp(name, "repo.enable-log-linecount"))
 207                 cgit_repo->enable_log_linecount = cgit_enable_log_linecount * atoi(value);
 208         else if (cgit_repo && !strcmp(name, "repo.module-link"))
 209                 cgit_repo->module_link= xstrdup(value);
 210         else if (cgit_repo && !strcmp(name, "repo.readme") && value != NULL) {
 211                 if (*value == '/')
 212                         cgit_repo->readme = xstrdup(value);
 213                 else
 214                         cgit_repo->readme = xstrdup(fmt("%s/%s", cgit_repo->path, value));
 215         } else if (!strcmp(name, "include"))
 216                 cgit_read_config(value, cgit_global_config_cb);
 217 }
 218
 219 void cgit_querystring_cb(const char *name, const char *value)
 220 {
 221         if (!strcmp(name,"r")) {
 222                 cgit_query_repo = xstrdup(value);
 223                 cgit_repo = cgit_get_repoinfo(value);
 224         } else if (!strcmp(name, "p")) {
 225                 cgit_query_page = xstrdup(value);
 226                 cgit_cmd = cgit_get_cmd_index(value);
 227         } else if (!strcmp(name, "url")) {
 228                 cgit_parse_url(value);
 229         } else if (!strcmp(name, "q")) {
 230                 cgit_query_search = xstrdup(value);
 231         } else if (!strcmp(name, "h")) {
 232                 cgit_query_head = xstrdup(value);
 233                 cgit_query_has_symref = 1;
 234         } else if (!strcmp(name, "id")) {
 235                 cgit_query_sha1 = xstrdup(value);
 236                 cgit_query_has_sha1 = 1;
 237         } else if (!strcmp(name, "id2")) {
 238                 cgit_query_sha2 = xstrdup(value);
 239                 cgit_query_has_sha1 = 1;
 240         } else if (!strcmp(name, "ofs")) {
 241                 cgit_query_ofs = atoi(value);
 242         } else if (!strcmp(name, "path")) {
 243                 cgit_query_path = trim_end(value, '/');
 244         } else if (!strcmp(name, "name")) {
 245                 cgit_query_name = xstrdup(value);
 246         }
 247 }
 248
 249 void *cgit_free_commitinfo(struct commitinfo *info)
 250 {
 251         free(info->author);
 252         free(info->author_email);
 253         free(info->committer);
 254         free(info->committer_email);
 255         free(info->subject);
 256         free(info);
 257         return NULL;
 258 }
 259
 260 int hextoint(char c)
 261 {
 262         if (c >= 'a' && c <= 'f')
 263                 return 10 + c - 'a';
 264         else if (c >= 'A' && c <= 'F')
 265                 return 10 + c - 'A';
 266         else if (c >= '0' && c <= '9')
 267                 return c - '0';
 268         else
 269                 return -1;
 270 }
 271
 272 char *trim_end(const char *str, char c)
 273 {
 274         int len;
 275         char *s, *t;
 276
 277         if (str == NULL)
 278                 return NULL;
 279         t = (char *)str;
 280         len = strlen(t);
 281         while(len > 0 && t[len - 1] == c)
 282                 len--;
 283
 284         if (len == 0)
 285                 return NULL;
 286
 287         c = t[len];
 288         t[len] = '\0';
 289         s = xstrdup(t);
 290         t[len] = c;
 291         return s;
 292 }
 293
 294 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 295                        struct diff_options *options, void *data)
 296 {
 297         int i;
 298
 299         for (i = 0; i < q->nr; i++) {
 300                 if (q->queue[i]->status == 'U')
 301                         continue;
 302                 ((filepair_fn)data)(q->queue[i]);
 303         }
 304 }
 305
 306 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 307 {
 308         enum object_type type;
 309
 310         if (is_null_sha1(sha1)) {
 311                 file->ptr = (char *)"";
 312                 file->size = 0;
 313         } else {
 314                 file->ptr = read_sha1_file(sha1, &type,
 315                                            (unsigned long *)&file->size);
 316         }
 317         return 1;
 318 }
 319
 320 /*
 321  * Receive diff-buffers from xdiff and concatenate them as
 322  * needed across multiple callbacks.
 323  *
 324  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 325  * ripped from git and modified to use globals instead of
 326  * a special callback-struct.
 327  */
 328 char *diffbuf = NULL;
 329 int buflen = 0;
 330
 331 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 332 {
 333         int i;
 334
 335         for (i = 0; i < nbuf; i++) {
 336                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 337                         /* Incomplete line */
 338                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 339                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 340                         buflen += mb[i].size;
 341                         continue;
 342                 }
 343
 344                 /* we have a complete line */
 345                 if (!diffbuf) {
 346                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 347                         continue;
 348                 }
 349                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 350                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 351                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 352                 free(diffbuf);
 353                 diffbuf = NULL;
 354                 buflen = 0;
 355         }
 356         if (diffbuf) {
 357                 ((linediff_fn)priv)(diffbuf, buflen);
 358                 free(diffbuf);
 359                 diffbuf = NULL;
 360                 buflen = 0;
 361         }
 362         return 0;
 363 }
 364
 365 int cgit_diff_files(const unsigned char *old_sha1,
 366                      const unsigned char *new_sha1,
 367                      linediff_fn fn)
 368 {
 369         mmfile_t file1, file2;
 370         xpparam_t diff_params;
 371         xdemitconf_t emit_params;
 372         xdemitcb_t emit_cb;
 373
 374         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 375                 return 1;
 376
 377         diff_params.flags = XDF_NEED_MINIMAL;
 378         emit_params.ctxlen = 3;
 379         emit_params.flags = XDL_EMIT_FUNCNAMES;
 380         emit_params.find_func = NULL;
 381         emit_cb.outf = filediff_cb;
 382         emit_cb.priv = fn;
 383         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 384         return 0;
 385 }
 386
 387 void cgit_diff_tree(const unsigned char *old_sha1,
 388                     const unsigned char *new_sha1,
 389                     filepair_fn fn, const char *prefix)
 390 {
 391         struct diff_options opt;
 392         int ret;
 393         int prefixlen;
 394
 395         diff_setup(&opt);
 396         opt.output_format = DIFF_FORMAT_CALLBACK;
 397         opt.detect_rename = 1;
 398         opt.rename_limit = cgit_renamelimit;
 399         opt.recursive = 1;
 400         opt.format_callback = cgit_diff_tree_cb;
 401         opt.format_callback_data = fn;
 402         if (prefix) {
 403                 opt.nr_paths = 1;
 404                 opt.paths = &prefix;
 405                 prefixlen = strlen(prefix);
 406                 opt.pathlens = &prefixlen;
 407         }
 408         diff_setup_done(&opt);
 409
 410         if (old_sha1 && !is_null_sha1(old_sha1))
 411                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 412         else
 413                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 414         diffcore_std(&opt);
 415         diff_flush(&opt);
 416 }
 417
 418 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 419 {
 420         unsigned char *old_sha1 = NULL;
 421
 422         if (commit->parents)
 423                 old_sha1 = commit->parents->item->object.sha1;
 424         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 425 }