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