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_index_links    =  0;
  30 int cgit_enable_log_filecount  =  0;
  31 int cgit_enable_log_linecount  =  0;
  32 int cgit_max_lock_attempts     =  5;
  33 int cgit_cache_root_ttl        =  5;
  34 int cgit_cache_repo_ttl        =  5;
  35 int cgit_cache_dynamic_ttl     =  5;
  36 int cgit_cache_static_ttl      = -1;
  37 int cgit_cache_max_create_time =  5;
  38 int cgit_summary_log           =  0;
  39
  40 int cgit_max_msg_len = 60;
  41 int cgit_max_repodesc_len = 60;
  42 int cgit_max_commit_count = 50;
  43
  44 int cgit_query_has_symref = 0;
  45 int cgit_query_has_sha1   = 0;
  46
  47 char *cgit_querystring  = NULL;
  48 char *cgit_query_repo   = NULL;
  49 char *cgit_query_page   = NULL;
  50 char *cgit_query_head   = NULL;
  51 char *cgit_query_search = NULL;
  52 char *cgit_query_sha1   = NULL;
  53 char *cgit_query_sha2   = NULL;
  54 char *cgit_query_path   = NULL;
  55 char *cgit_query_name   = NULL;
  56 int   cgit_query_ofs    = 0;
  57
  58 int htmlfd = 0;
  59
  60
  61 int cgit_get_cmd_index(const char *cmd)
  62 {
  63         static char *cmds[] = {"log", "commit", "diff", "tree", "blob",
  64                                "snapshot", NULL};
  65         int i;
  66
  67         for(i = 0; cmds[i]; i++)
  68                 if (!strcmp(cmd, cmds[i]))
  69                         return i + 1;
  70         return 0;
  71 }
  72
  73 int chk_zero(int result, char *msg)
  74 {
  75         if (result != 0)
  76                 die("%s: %s", msg, strerror(errno));
  77         return result;
  78 }
  79
  80 int chk_positive(int result, char *msg)
  81 {
  82         if (result <= 0)
  83                 die("%s: %s", msg, strerror(errno));
  84         return result;
  85 }
  86
  87 struct repoinfo *add_repo(const char *url)
  88 {
  89         struct repoinfo *ret;
  90
  91         if (++cgit_repolist.count > cgit_repolist.length) {
  92                 if (cgit_repolist.length == 0)
  93                         cgit_repolist.length = 8;
  94                 else
  95                         cgit_repolist.length *= 2;
  96                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
  97                                                cgit_repolist.length *
  98                                                sizeof(struct repoinfo));
  99         }
 100
 101         ret = &cgit_repolist.repos[cgit_repolist.count-1];
 102         ret->url = xstrdup(url);
 103         ret->name = ret->url;
 104         ret->path = NULL;
 105         ret->desc = NULL;
 106         ret->owner = NULL;
 107         ret->group = cgit_repo_group;
 108         ret->defbranch = "master";
 109         ret->snapshots = cgit_snapshots;
 110         ret->enable_log_filecount = cgit_enable_log_filecount;
 111         ret->enable_log_linecount = cgit_enable_log_linecount;
 112         ret->module_link = cgit_module_link;
 113         ret->readme = NULL;
 114         return ret;
 115 }
 116
 117 struct repoinfo *cgit_get_repoinfo(const char *url)
 118 {
 119         int i;
 120         struct repoinfo *repo;
 121
 122         for (i=0; i<cgit_repolist.count; i++) {
 123                 repo = &cgit_repolist.repos[i];
 124                 if (!strcmp(repo->url, url))
 125                         return repo;
 126         }
 127         return NULL;
 128 }
 129
 130 void cgit_global_config_cb(const char *name, const char *value)
 131 {
 132         if (!strcmp(name, "root-title"))
 133                 cgit_root_title = xstrdup(value);
 134         else if (!strcmp(name, "css"))
 135                 cgit_css = xstrdup(value);
 136         else if (!strcmp(name, "logo"))
 137                 cgit_logo = xstrdup(value);
 138         else if (!strcmp(name, "index-header"))
 139                 cgit_index_header = xstrdup(value);
 140         else if (!strcmp(name, "logo-link"))
 141                 cgit_logo_link = xstrdup(value);
 142         else if (!strcmp(name, "module-link"))
 143                 cgit_module_link = xstrdup(value);
 144         else if (!strcmp(name, "virtual-root"))
 145                 cgit_virtual_root = xstrdup(value);
 146         else if (!strcmp(name, "nocache"))
 147                 cgit_nocache = atoi(value);
 148         else if (!strcmp(name, "snapshots"))
 149                 cgit_snapshots = atoi(value);
 150         else if (!strcmp(name, "enable-index-links"))
 151                 cgit_enable_index_links = atoi(value);
 152         else if (!strcmp(name, "enable-log-filecount"))
 153                 cgit_enable_log_filecount = atoi(value);
 154         else if (!strcmp(name, "enable-log-linecount"))
 155                 cgit_enable_log_linecount = atoi(value);
 156         else if (!strcmp(name, "cache-root"))
 157                 cgit_cache_root = xstrdup(value);
 158         else if (!strcmp(name, "cache-root-ttl"))
 159                 cgit_cache_root_ttl = atoi(value);
 160         else if (!strcmp(name, "cache-repo-ttl"))
 161                 cgit_cache_repo_ttl = atoi(value);
 162         else if (!strcmp(name, "cache-static-ttl"))
 163                 cgit_cache_static_ttl = atoi(value);
 164         else if (!strcmp(name, "cache-dynamic-ttl"))
 165                 cgit_cache_dynamic_ttl = atoi(value);
 166         else if (!strcmp(name, "max-message-length"))
 167                 cgit_max_msg_len = atoi(value);
 168         else if (!strcmp(name, "max-repodesc-length"))
 169                 cgit_max_repodesc_len = atoi(value);
 170         else if (!strcmp(name, "max-commit-count"))
 171                 cgit_max_commit_count = atoi(value);
 172         else if (!strcmp(name, "summary-log"))
 173                 cgit_summary_log = atoi(value);
 174         else if (!strcmp(name, "agefile"))
 175                 cgit_agefile = xstrdup(value);
 176         else if (!strcmp(name, "repo.group"))
 177                 cgit_repo_group = xstrdup(value);
 178         else if (!strcmp(name, "repo.url"))
 179                 cgit_repo = add_repo(value);
 180         else if (!strcmp(name, "repo.name"))
 181                 cgit_repo->name = xstrdup(value);
 182         else if (cgit_repo && !strcmp(name, "repo.path"))
 183                 cgit_repo->path = xstrdup(value);
 184         else if (cgit_repo && !strcmp(name, "repo.desc"))
 185                 cgit_repo->desc = xstrdup(value);
 186         else if (cgit_repo && !strcmp(name, "repo.owner"))
 187                 cgit_repo->owner = xstrdup(value);
 188         else if (cgit_repo && !strcmp(name, "repo.defbranch"))
 189                 cgit_repo->defbranch = xstrdup(value);
 190         else if (cgit_repo && !strcmp(name, "repo.snapshots"))
 191                 cgit_repo->snapshots = cgit_snapshots * atoi(value);
 192         else if (cgit_repo && !strcmp(name, "repo.enable-log-filecount"))
 193                 cgit_repo->enable_log_filecount = cgit_enable_log_filecount * atoi(value);
 194         else if (cgit_repo && !strcmp(name, "repo.enable-log-linecount"))
 195                 cgit_repo->enable_log_linecount = cgit_enable_log_linecount * atoi(value);
 196         else if (cgit_repo && !strcmp(name, "repo.module-link"))
 197                 cgit_repo->module_link= xstrdup(value);
 198         else if (cgit_repo && !strcmp(name, "repo.readme") && value != NULL) {
 199                 if (*value == '/')
 200                         cgit_repo->readme = xstrdup(value);
 201                 else
 202                         cgit_repo->readme = xstrdup(fmt("%s/%s", cgit_repo->path, value));
 203         } else if (!strcmp(name, "include"))
 204                 cgit_read_config(value, cgit_global_config_cb);
 205 }
 206
 207 void cgit_querystring_cb(const char *name, const char *value)
 208 {
 209         if (!strcmp(name,"r")) {
 210                 cgit_query_repo = xstrdup(value);
 211                 cgit_repo = cgit_get_repoinfo(value);
 212         } else if (!strcmp(name, "p")) {
 213                 cgit_query_page = xstrdup(value);
 214                 cgit_cmd = cgit_get_cmd_index(value);
 215         } else if (!strcmp(name, "url")) {
 216                 cgit_parse_url(value);
 217         } else if (!strcmp(name, "q")) {
 218                 cgit_query_search = xstrdup(value);
 219         } else if (!strcmp(name, "h")) {
 220                 cgit_query_head = xstrdup(value);
 221                 cgit_query_has_symref = 1;
 222         } else if (!strcmp(name, "id")) {
 223                 cgit_query_sha1 = xstrdup(value);
 224                 cgit_query_has_sha1 = 1;
 225         } else if (!strcmp(name, "id2")) {
 226                 cgit_query_sha2 = xstrdup(value);
 227                 cgit_query_has_sha1 = 1;
 228         } else if (!strcmp(name, "ofs")) {
 229                 cgit_query_ofs = atoi(value);
 230         } else if (!strcmp(name, "path")) {
 231                 cgit_query_path = trim_end(value, '/');
 232         } else if (!strcmp(name, "name")) {
 233                 cgit_query_name = xstrdup(value);
 234         }
 235 }
 236
 237 void *cgit_free_commitinfo(struct commitinfo *info)
 238 {
 239         free(info->author);
 240         free(info->author_email);
 241         free(info->committer);
 242         free(info->committer_email);
 243         free(info->subject);
 244         free(info);
 245         return NULL;
 246 }
 247
 248 int hextoint(char c)
 249 {
 250         if (c >= 'a' && c <= 'f')
 251                 return 10 + c - 'a';
 252         else if (c >= 'A' && c <= 'F')
 253                 return 10 + c - 'A';
 254         else if (c >= '0' && c <= '9')
 255                 return c - '0';
 256         else
 257                 return -1;
 258 }
 259
 260 char *trim_end(const char *str, char c)
 261 {
 262         int len;
 263         char *s, *t;
 264
 265         if (str == NULL)
 266                 return NULL;
 267         t = (char *)str;
 268         len = strlen(t);
 269         while(len > 0 && t[len - 1] == c)
 270                 len--;
 271
 272         if (len == 0)
 273                 return NULL;
 274
 275         c = t[len];
 276         t[len] = '\0';
 277         s = xstrdup(t);
 278         t[len] = c;
 279         return s;
 280 }
 281
 282 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 283                        struct diff_options *options, void *data)
 284 {
 285         int i;
 286
 287         for (i = 0; i < q->nr; i++) {
 288                 if (q->queue[i]->status == 'U')
 289                         continue;
 290                 ((filepair_fn)data)(q->queue[i]);
 291         }
 292 }
 293
 294 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 295 {
 296         enum object_type type;
 297
 298         if (is_null_sha1(sha1)) {
 299                 file->ptr = (char *)"";
 300                 file->size = 0;
 301         } else {
 302                 file->ptr = read_sha1_file(sha1, &type, &file->size);
 303         }
 304         return 1;
 305 }
 306
 307 /*
 308  * Receive diff-buffers from xdiff and concatenate them as
 309  * needed across multiple callbacks.
 310  *
 311  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 312  * ripped from git and modified to use globals instead of
 313  * a special callback-struct.
 314  */
 315 char *diffbuf = NULL;
 316 int buflen = 0;
 317
 318 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 319 {
 320         int i;
 321
 322         for (i = 0; i < nbuf; i++) {
 323                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 324                         /* Incomplete line */
 325                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 326                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 327                         buflen += mb[i].size;
 328                         continue;
 329                 }
 330
 331                 /* we have a complete line */
 332                 if (!diffbuf) {
 333                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 334                         continue;
 335                 }
 336                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 337                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 338                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 339                 free(diffbuf);
 340                 diffbuf = NULL;
 341                 buflen = 0;
 342         }
 343         if (diffbuf) {
 344                 ((linediff_fn)priv)(diffbuf, buflen);
 345                 free(diffbuf);
 346                 diffbuf = NULL;
 347                 buflen = 0;
 348         }
 349         return 0;
 350 }
 351
 352 int cgit_diff_files(const unsigned char *old_sha1,
 353                      const unsigned char *new_sha1,
 354                      linediff_fn fn)
 355 {
 356         mmfile_t file1, file2;
 357         xpparam_t diff_params;
 358         xdemitconf_t emit_params;
 359         xdemitcb_t emit_cb;
 360
 361         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 362                 return 1;
 363
 364         diff_params.flags = XDF_NEED_MINIMAL;
 365         emit_params.ctxlen = 3;
 366         emit_params.flags = XDL_EMIT_FUNCNAMES;
 367         emit_cb.outf = filediff_cb;
 368         emit_cb.priv = fn;
 369         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 370         return 0;
 371 }
 372
 373 void cgit_diff_tree(const unsigned char *old_sha1,
 374                     const unsigned char *new_sha1,
 375                     filepair_fn fn)
 376 {
 377         struct diff_options opt;
 378         int ret;
 379
 380         diff_setup(&opt);
 381         opt.output_format = DIFF_FORMAT_CALLBACK;
 382         opt.detect_rename = 1;
 383         opt.recursive = 1;
 384         opt.format_callback = cgit_diff_tree_cb;
 385         opt.format_callback_data = fn;
 386         diff_setup_done(&opt);
 387
 388         if (old_sha1 && !is_null_sha1(old_sha1))
 389                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 390         else
 391                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 392         diffcore_std(&opt);
 393         diff_flush(&opt);
 394 }
 395
 396 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 397 {
 398         unsigned char *old_sha1 = NULL;
 399
 400         if (commit->parents)
 401                 old_sha1 = commit->parents->item->object.sha1;
 402         cgit_diff_tree(old_sha1, commit->object.sha1, fn);
 403 }