parsing.c

   1 /* parsing.c: parsing of config files
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10
  11 /*
  12  * url syntax: [repo ['/' cmd [ '/' path]]]
  13  *   repo: any valid repo url, may contain '/'
  14  *   cmd:  log | commit | diff | tree | view | blob | snapshot
  15  *   path: any valid path, may contain '/'
  16  *
  17  */
  18 void cgit_parse_url(const char *url)
  19 {
  20         char *c, *cmd, *p;
  21         struct cgit_repo *repo;
  22
  23         ctx.repo = NULL;
  24         if (!url || url[0] == '\0')
  25                 return;
  26
  27         ctx.repo = cgit_get_repoinfo(url);
  28         if (ctx.repo) {
  29                 ctx.qry.repo = ctx.repo->url;
  30                 return;
  31         }
  32
  33         cmd = NULL;
  34         c = strchr(url, '/');
  35         while (c) {
  36                 c[0] = '\0';
  37                 repo = cgit_get_repoinfo(url);
  38                 if (repo) {
  39                         ctx.repo = repo;
  40                         cmd = c;
  41                 }
  42                 c[0] = '/';
  43                 c = strchr(c + 1, '/');
  44         }
  45
  46         if (ctx.repo) {
  47                 ctx.qry.repo = ctx.repo->url;
  48                 p = strchr(cmd + 1, '/');
  49                 if (p) {
  50                         p[0] = '\0';
  51                         if (p[1])
  52                                 ctx.qry.path = trim_end(p + 1, '/');
  53                 }
  54                 if (cmd[1])
  55                         ctx.qry.page = xstrdup(cmd + 1);
  56                 return;
  57         }
  58 }
  59
  60 static char *substr(const char *head, const char *tail)
  61 {
  62         char *buf;
  63
  64         if (tail < head)
  65                 return xstrdup("");
  66         buf = xmalloc(tail - head + 1);
  67         strncpy(buf, head, tail - head);
  68         buf[tail - head] = '\0';
  69         return buf;
  70 }
  71
  72 static const char *parse_user(const char *t, char **name, char **email, unsigned long *date)
  73 {
  74         const char *line_end = strchrnul(t, '\n');
  75         struct ident_split ident;
  76         unsigned email_len;
  77
  78         if (!split_ident_line(&ident, t, line_end - t)) {
  79                 *name = substr(ident.name_begin, ident.name_end);
  80
  81                 email_len = ident.mail_end - ident.mail_begin;
  82                 *email = xmalloc(strlen("<") + email_len + strlen(">") + 1);
  83                 sprintf(*email, "<%.*s>", email_len, ident.mail_begin);
  84
  85                 if (ident.date_begin)
  86                         *date = strtoul(ident.date_begin, NULL, 10);
  87         }
  88
  89         if (*line_end)
  90                 return line_end + 1;
  91         else
  92                 return line_end;
  93 }
  94
  95 #ifdef NO_ICONV
  96 #define reencode(a, b, c)
  97 #else
  98 static const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
  99 {
 100         char *tmp;
 101
 102         if (!txt)
 103                 return NULL;
 104
 105         if (!*txt || !src_enc || !dst_enc)
 106                 return *txt;
 107
 108         /* no encoding needed if src_enc equals dst_enc */
 109         if (!strcasecmp(src_enc, dst_enc))
 110                 return *txt;
 111
 112         tmp = reencode_string(*txt, dst_enc, src_enc);
 113         if (tmp) {
 114                 free(*txt);
 115                 *txt = tmp;
 116         }
 117         return *txt;
 118 }
 119 #endif
 120
 121 static const char *next_header_line(const char *p)
 122 {
 123         p = strchr(p, '\n');
 124         if (!p)
 125                 return NULL;
 126         return p + 1;
 127 }
 128
 129 static int end_of_header(const char *p)
 130 {
 131         return !p || (*p == '\n');
 132 }
 133
 134 struct commitinfo *cgit_parse_commit(struct commit *commit)
 135 {
 136         const int sha1hex_len = 40;
 137         struct commitinfo *ret;
 138         const char *p = get_cached_commit_buffer(commit, NULL);
 139         const char *t;
 140
 141         ret = xcalloc(1, sizeof(struct commitinfo));
 142         ret->commit = commit;
 143
 144         if (!p)
 145                 return ret;
 146
 147         if (!skip_prefix(p, "tree ", &p))
 148                 die("Bad commit: %s", sha1_to_hex(commit->object.sha1));
 149         p += sha1hex_len + 1;
 150
 151         while (skip_prefix(p, "parent ", &p))
 152                 p += sha1hex_len + 1;
 153
 154         if (p && skip_prefix(p, "author ", &p)) {
 155                 p = parse_user(p, &ret->author, &ret->author_email,
 156                         &ret->author_date);
 157         }
 158
 159         if (p && skip_prefix(p, "committer ", &p)) {
 160                 p = parse_user(p, &ret->committer, &ret->committer_email,
 161                         &ret->committer_date);
 162         }
 163
 164         if (p && skip_prefix(p, "encoding ", &p)) {
 165                 t = strchr(p, '\n');
 166                 if (t) {
 167                         ret->msg_encoding = substr(p, t + 1);
 168                         p = t + 1;
 169                 }
 170         }
 171
 172         if (!ret->msg_encoding)
 173                 ret->msg_encoding = xstrdup("UTF-8");
 174
 175         while (!end_of_header(p))
 176                 p = next_header_line(p);
 177         while (p && *p == '\n')
 178                 p++;
 179         if (!p)
 180                 return ret;
 181
 182         t = strchrnul(p, '\n');
 183         ret->subject = substr(p, t);
 184         while (*t == '\n')
 185                 t++;
 186         ret->msg = xstrdup(t);
 187
 188         reencode(&ret->author, ret->msg_encoding, PAGE_ENCODING);
 189         reencode(&ret->author_email, ret->msg_encoding, PAGE_ENCODING);
 190         reencode(&ret->committer, ret->msg_encoding, PAGE_ENCODING);
 191         reencode(&ret->committer_email, ret->msg_encoding, PAGE_ENCODING);
 192         reencode(&ret->subject, ret->msg_encoding, PAGE_ENCODING);
 193         reencode(&ret->msg, ret->msg_encoding, PAGE_ENCODING);
 194
 195         return ret;
 196 }
 197
 198 struct taginfo *cgit_parse_tag(struct tag *tag)
 199 {
 200         void *data;
 201         enum object_type type;
 202         unsigned long size;
 203         const char *p;
 204         struct taginfo *ret = NULL;
 205
 206         data = read_sha1_file(tag->object.sha1, &type, &size);
 207         if (!data || type != OBJ_TAG)
 208                 goto cleanup;
 209
 210         ret = xcalloc(1, sizeof(struct taginfo));
 211
 212         for (p = data; !end_of_header(p); p = next_header_line(p)) {
 213                 if (skip_prefix(p, "tagger ", &p)) {
 214                         p = parse_user(p, &ret->tagger, &ret->tagger_email,
 215                                 &ret->tagger_date);
 216                 }
 217         }
 218
 219         if (p && *p)
 220                 ret->msg = xstrdup(p);
 221
 222 cleanup:
 223         free(data);
 224         return ret;
 225 }