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 cgit_repolist cgit_repolist;
  12 struct cgit_context ctx;
  13 int cgit_cmd;
  14
  15 int chk_zero(int result, char *msg)
  16 {
  17         if (result != 0)
  18                 die("%s: %s", msg, strerror(errno));
  19         return result;
  20 }
  21
  22 int chk_positive(int result, char *msg)
  23 {
  24         if (result <= 0)
  25                 die("%s: %s", msg, strerror(errno));
  26         return result;
  27 }
  28
  29 int chk_non_negative(int result, char *msg)
  30 {
  31         if (result < 0)
  32                 die("%s: %s",msg, strerror(errno));
  33         return result;
  34 }
  35
  36 struct cgit_repo *cgit_add_repo(const char *url)
  37 {
  38         struct cgit_repo *ret;
  39
  40         if (++cgit_repolist.count > cgit_repolist.length) {
  41                 if (cgit_repolist.length == 0)
  42                         cgit_repolist.length = 8;
  43                 else
  44                         cgit_repolist.length *= 2;
  45                 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
  46                                                cgit_repolist.length *
  47                                                sizeof(struct cgit_repo));
  48         }
  49
  50         ret = &cgit_repolist.repos[cgit_repolist.count-1];
  51         ret->url = trim_end(url, '/');
  52         ret->name = ret->url;
  53         ret->path = NULL;
  54         ret->desc = "[no description]";
  55         ret->owner = NULL;
  56         ret->group = ctx.cfg.repo_group;
  57         ret->defbranch = "master";
  58         ret->snapshots = ctx.cfg.snapshots;
  59         ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
  60         ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
  61         ret->module_link = ctx.cfg.module_link;
  62         ret->readme = NULL;
  63         ret->mtime = -1;
  64         return ret;
  65 }
  66
  67 struct cgit_repo *cgit_get_repoinfo(const char *url)
  68 {
  69         int i;
  70         struct cgit_repo *repo;
  71
  72         for (i=0; i<cgit_repolist.count; i++) {
  73                 repo = &cgit_repolist.repos[i];
  74                 if (!strcmp(repo->url, url))
  75                         return repo;
  76         }
  77         return NULL;
  78 }
  79
  80 void *cgit_free_commitinfo(struct commitinfo *info)
  81 {
  82         free(info->author);
  83         free(info->author_email);
  84         free(info->committer);
  85         free(info->committer_email);
  86         free(info->subject);
  87         free(info->msg);
  88         free(info->msg_encoding);
  89         free(info);
  90         return NULL;
  91 }
  92
  93 char *trim_end(const char *str, char c)
  94 {
  95         int len;
  96         char *s, *t;
  97
  98         if (str == NULL)
  99                 return NULL;
 100         t = (char *)str;
 101         len = strlen(t);
 102         while(len > 0 && t[len - 1] == c)
 103                 len--;
 104
 105         if (len == 0)
 106                 return NULL;
 107
 108         c = t[len];
 109         t[len] = '\0';
 110         s = xstrdup(t);
 111         t[len] = c;
 112         return s;
 113 }
 114
 115 char *strlpart(char *txt, int maxlen)
 116 {
 117         char *result;
 118
 119         if (!txt)
 120                 return txt;
 121
 122         if (strlen(txt) <= maxlen)
 123                 return txt;
 124         result = xmalloc(maxlen + 1);
 125         memcpy(result, txt, maxlen - 3);
 126         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 127         result[maxlen] = '\0';
 128         return result;
 129 }
 130
 131 char *strrpart(char *txt, int maxlen)
 132 {
 133         char *result;
 134
 135         if (!txt)
 136                 return txt;
 137
 138         if (strlen(txt) <= maxlen)
 139                 return txt;
 140         result = xmalloc(maxlen + 1);
 141         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 142         result[0] = result[1] = result[2] = '.';
 143         return result;
 144 }
 145
 146 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 147 {
 148         size_t size;
 149
 150         if (list->count >= list->alloc) {
 151                 list->alloc += (list->alloc ? list->alloc : 4);
 152                 size = list->alloc * sizeof(struct refinfo *);
 153                 list->refs = xrealloc(list->refs, size);
 154         }
 155         list->refs[list->count++] = ref;
 156 }
 157
 158 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 159 {
 160         struct refinfo *ref;
 161
 162         ref = xmalloc(sizeof (struct refinfo));
 163         ref->refname = xstrdup(refname);
 164         ref->object = parse_object(sha1);
 165         switch (ref->object->type) {
 166         case OBJ_TAG:
 167                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 168                 break;
 169         case OBJ_COMMIT:
 170                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 171                 break;
 172         }
 173         return ref;
 174 }
 175
 176 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 177                   void *cb_data)
 178 {
 179         struct reflist *list = (struct reflist *)cb_data;
 180         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 181
 182         if (info)
 183                 cgit_add_ref(list, info);
 184         return 0;
 185 }
 186
 187 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 188                        struct diff_options *options, void *data)
 189 {
 190         int i;
 191
 192         for (i = 0; i < q->nr; i++) {
 193                 if (q->queue[i]->status == 'U')
 194                         continue;
 195                 ((filepair_fn)data)(q->queue[i]);
 196         }
 197 }
 198
 199 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 200 {
 201         enum object_type type;
 202
 203         if (is_null_sha1(sha1)) {
 204                 file->ptr = (char *)"";
 205                 file->size = 0;
 206         } else {
 207                 file->ptr = read_sha1_file(sha1, &type,
 208                                            (unsigned long *)&file->size);
 209         }
 210         return 1;
 211 }
 212
 213 /*
 214  * Receive diff-buffers from xdiff and concatenate them as
 215  * needed across multiple callbacks.
 216  *
 217  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 218  * ripped from git and modified to use globals instead of
 219  * a special callback-struct.
 220  */
 221 char *diffbuf = NULL;
 222 int buflen = 0;
 223
 224 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 225 {
 226         int i;
 227
 228         for (i = 0; i < nbuf; i++) {
 229                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 230                         /* Incomplete line */
 231                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 232                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 233                         buflen += mb[i].size;
 234                         continue;
 235                 }
 236
 237                 /* we have a complete line */
 238                 if (!diffbuf) {
 239                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 240                         continue;
 241                 }
 242                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 243                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 244                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 245                 free(diffbuf);
 246                 diffbuf = NULL;
 247                 buflen = 0;
 248         }
 249         if (diffbuf) {
 250                 ((linediff_fn)priv)(diffbuf, buflen);
 251                 free(diffbuf);
 252                 diffbuf = NULL;
 253                 buflen = 0;
 254         }
 255         return 0;
 256 }
 257
 258 int cgit_diff_files(const unsigned char *old_sha1,
 259                      const unsigned char *new_sha1,
 260                      linediff_fn fn)
 261 {
 262         mmfile_t file1, file2;
 263         xpparam_t diff_params;
 264         xdemitconf_t emit_params;
 265         xdemitcb_t emit_cb;
 266
 267         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 268                 return 1;
 269
 270         memset(&diff_params, 0, sizeof(diff_params));
 271         memset(&emit_params, 0, sizeof(emit_params));
 272         memset(&emit_cb, 0, sizeof(emit_cb));
 273         diff_params.flags = XDF_NEED_MINIMAL;
 274         emit_params.ctxlen = 3;
 275         emit_params.flags = XDL_EMIT_FUNCNAMES;
 276         emit_cb.outf = filediff_cb;
 277         emit_cb.priv = fn;
 278         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 279         return 0;
 280 }
 281
 282 void cgit_diff_tree(const unsigned char *old_sha1,
 283                     const unsigned char *new_sha1,
 284                     filepair_fn fn, const char *prefix)
 285 {
 286         struct diff_options opt;
 287         int ret;
 288         int prefixlen;
 289
 290         diff_setup(&opt);
 291         opt.output_format = DIFF_FORMAT_CALLBACK;
 292         opt.detect_rename = 1;
 293         opt.rename_limit = ctx.cfg.renamelimit;
 294         DIFF_OPT_SET(&opt, RECURSIVE);
 295         opt.format_callback = cgit_diff_tree_cb;
 296         opt.format_callback_data = fn;
 297         if (prefix) {
 298                 opt.nr_paths = 1;
 299                 opt.paths = &prefix;
 300                 prefixlen = strlen(prefix);
 301                 opt.pathlens = &prefixlen;
 302         }
 303         diff_setup_done(&opt);
 304
 305         if (old_sha1 && !is_null_sha1(old_sha1))
 306                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 307         else
 308                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 309         diffcore_std(&opt);
 310         diff_flush(&opt);
 311 }
 312
 313 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 314 {
 315         unsigned char *old_sha1 = NULL;
 316
 317         if (commit->parents)
 318                 old_sha1 = commit->parents->item->object.sha1;
 319         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 320 }
 321
 322 int cgit_parse_snapshots_mask(const char *str)
 323 {
 324         const struct cgit_snapshot_format *f;
 325         static const char *delim = " \t,:/|;";
 326         int tl, sl, rv = 0;
 327
 328         /* favor legacy setting */
 329         if(atoi(str))
 330                 return 1;
 331         for(;;) {
 332                 str += strspn(str,delim);
 333                 tl = strcspn(str,delim);
 334                 if (!tl)
 335                         break;
 336                 for (f = cgit_snapshot_formats; f->suffix; f++) {
 337                         sl = strlen(f->suffix);
 338                         if((tl == sl && !strncmp(f->suffix, str, tl)) ||
 339                            (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
 340                                 rv |= f->bit;
 341                                 break;
 342                         }
 343                 }
 344                 str += tl;
 345         }
 346         return rv;
 347 }