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         return ret;
  64 }
  65
  66 struct cgit_repo *cgit_get_repoinfo(const char *url)
  67 {
  68         int i;
  69         struct cgit_repo *repo;
  70
  71         for (i=0; i<cgit_repolist.count; i++) {
  72                 repo = &cgit_repolist.repos[i];
  73                 if (!strcmp(repo->url, url))
  74                         return repo;
  75         }
  76         return NULL;
  77 }
  78
  79 void *cgit_free_commitinfo(struct commitinfo *info)
  80 {
  81         free(info->author);
  82         free(info->author_email);
  83         free(info->committer);
  84         free(info->committer_email);
  85         free(info->subject);
  86         free(info->msg);
  87         free(info->msg_encoding);
  88         free(info);
  89         return NULL;
  90 }
  91
  92 char *trim_end(const char *str, char c)
  93 {
  94         int len;
  95         char *s, *t;
  96
  97         if (str == NULL)
  98                 return NULL;
  99         t = (char *)str;
 100         len = strlen(t);
 101         while(len > 0 && t[len - 1] == c)
 102                 len--;
 103
 104         if (len == 0)
 105                 return NULL;
 106
 107         c = t[len];
 108         t[len] = '\0';
 109         s = xstrdup(t);
 110         t[len] = c;
 111         return s;
 112 }
 113
 114 char *strlpart(char *txt, int maxlen)
 115 {
 116         char *result;
 117
 118         if (!txt)
 119                 return txt;
 120
 121         if (strlen(txt) <= maxlen)
 122                 return txt;
 123         result = xmalloc(maxlen + 1);
 124         memcpy(result, txt, maxlen - 3);
 125         result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 126         result[maxlen] = '\0';
 127         return result;
 128 }
 129
 130 char *strrpart(char *txt, int maxlen)
 131 {
 132         char *result;
 133
 134         if (!txt)
 135                 return txt;
 136
 137         if (strlen(txt) <= maxlen)
 138                 return txt;
 139         result = xmalloc(maxlen + 1);
 140         memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 141         result[0] = result[1] = result[2] = '.';
 142         return result;
 143 }
 144
 145 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 146 {
 147         size_t size;
 148
 149         if (list->count >= list->alloc) {
 150                 list->alloc += (list->alloc ? list->alloc : 4);
 151                 size = list->alloc * sizeof(struct refinfo *);
 152                 list->refs = xrealloc(list->refs, size);
 153         }
 154         list->refs[list->count++] = ref;
 155 }
 156
 157 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 158 {
 159         struct refinfo *ref;
 160
 161         ref = xmalloc(sizeof (struct refinfo));
 162         ref->refname = xstrdup(refname);
 163         ref->object = parse_object(sha1);
 164         switch (ref->object->type) {
 165         case OBJ_TAG:
 166                 ref->tag = cgit_parse_tag((struct tag *)ref->object);
 167                 break;
 168         case OBJ_COMMIT:
 169                 ref->commit = cgit_parse_commit((struct commit *)ref->object);
 170                 break;
 171         }
 172         return ref;
 173 }
 174
 175 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 176                   void *cb_data)
 177 {
 178         struct reflist *list = (struct reflist *)cb_data;
 179         struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 180
 181         if (info)
 182                 cgit_add_ref(list, info);
 183         return 0;
 184 }
 185
 186 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 187                        struct diff_options *options, void *data)
 188 {
 189         int i;
 190
 191         for (i = 0; i < q->nr; i++) {
 192                 if (q->queue[i]->status == 'U')
 193                         continue;
 194                 ((filepair_fn)data)(q->queue[i]);
 195         }
 196 }
 197
 198 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 199 {
 200         enum object_type type;
 201
 202         if (is_null_sha1(sha1)) {
 203                 file->ptr = (char *)"";
 204                 file->size = 0;
 205         } else {
 206                 file->ptr = read_sha1_file(sha1, &type,
 207                                            (unsigned long *)&file->size);
 208         }
 209         return 1;
 210 }
 211
 212 /*
 213  * Receive diff-buffers from xdiff and concatenate them as
 214  * needed across multiple callbacks.
 215  *
 216  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 217  * ripped from git and modified to use globals instead of
 218  * a special callback-struct.
 219  */
 220 char *diffbuf = NULL;
 221 int buflen = 0;
 222
 223 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 224 {
 225         int i;
 226
 227         for (i = 0; i < nbuf; i++) {
 228                 if (mb[i].ptr[mb[i].size-1] != '\n') {
 229                         /* Incomplete line */
 230                         diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 231                         memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 232                         buflen += mb[i].size;
 233                         continue;
 234                 }
 235
 236                 /* we have a complete line */
 237                 if (!diffbuf) {
 238                         ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 239                         continue;
 240                 }
 241                 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 242                 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 243                 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 244                 free(diffbuf);
 245                 diffbuf = NULL;
 246                 buflen = 0;
 247         }
 248         if (diffbuf) {
 249                 ((linediff_fn)priv)(diffbuf, buflen);
 250                 free(diffbuf);
 251                 diffbuf = NULL;
 252                 buflen = 0;
 253         }
 254         return 0;
 255 }
 256
 257 int cgit_diff_files(const unsigned char *old_sha1,
 258                      const unsigned char *new_sha1,
 259                      linediff_fn fn)
 260 {
 261         mmfile_t file1, file2;
 262         xpparam_t diff_params;
 263         xdemitconf_t emit_params;
 264         xdemitcb_t emit_cb;
 265
 266         if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
 267                 return 1;
 268
 269         diff_params.flags = XDF_NEED_MINIMAL;
 270         emit_params.ctxlen = 3;
 271         emit_params.flags = XDL_EMIT_FUNCNAMES;
 272         emit_params.find_func = NULL;
 273         emit_cb.outf = filediff_cb;
 274         emit_cb.priv = fn;
 275         xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
 276         return 0;
 277 }
 278
 279 void cgit_diff_tree(const unsigned char *old_sha1,
 280                     const unsigned char *new_sha1,
 281                     filepair_fn fn, const char *prefix)
 282 {
 283         struct diff_options opt;
 284         int ret;
 285         int prefixlen;
 286
 287         diff_setup(&opt);
 288         opt.output_format = DIFF_FORMAT_CALLBACK;
 289         opt.detect_rename = 1;
 290         opt.rename_limit = ctx.cfg.renamelimit;
 291         DIFF_OPT_SET(&opt, RECURSIVE);
 292         opt.format_callback = cgit_diff_tree_cb;
 293         opt.format_callback_data = fn;
 294         if (prefix) {
 295                 opt.nr_paths = 1;
 296                 opt.paths = &prefix;
 297                 prefixlen = strlen(prefix);
 298                 opt.pathlens = &prefixlen;
 299         }
 300         diff_setup_done(&opt);
 301
 302         if (old_sha1 && !is_null_sha1(old_sha1))
 303                 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
 304         else
 305                 ret = diff_root_tree_sha1(new_sha1, "", &opt);
 306         diffcore_std(&opt);
 307         diff_flush(&opt);
 308 }
 309
 310 void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 311 {
 312         unsigned char *old_sha1 = NULL;
 313
 314         if (commit->parents)
 315                 old_sha1 = commit->parents->item->object.sha1;
 316         cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 317 }
 318
 319 int cgit_parse_snapshots_mask(const char *str)
 320 {
 321         const struct cgit_snapshot_format *f;
 322         static const char *delim = " \t,:/|;";
 323         int tl, sl, rv = 0;
 324
 325         /* favor legacy setting */
 326         if(atoi(str))
 327                 return 1;
 328         for(;;) {
 329                 str += strspn(str,delim);
 330                 tl = strcspn(str,delim);
 331                 if (!tl)
 332                         break;
 333                 for (f = cgit_snapshot_formats; f->suffix; f++) {
 334                         sl = strlen(f->suffix);
 335                         if((tl == sl && !strncmp(f->suffix, str, tl)) ||
 336                            (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
 337                                 rv |= f->bit;
 338                                 break;
 339                         }
 340                 }
 341                 str += tl;
 342         }
 343         return rv;
 344 }