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