gitweb.ps.run Git - ps-cgit/blob - cgit.c

   1 /* cgit.c: cgi for the git scm
   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 const char cgit_version[] = CGIT_VERSION;
  12
  13
  14 static struct repoinfo *cgit_get_repoinfo(char *url)
  15 {
  16         int i;
  17         struct repoinfo *repo;
  18
  19         for (i=0; i<cgit_repolist.count; i++) {
  20                 repo = &cgit_repolist.repos[i];
  21                 if (!strcmp(repo->url, url))
  22                         return repo;
  23         }
  24         return NULL;
  25 }
  26
  27
  28 static int cgit_prepare_cache(struct cacheitem *item)
  29 {
  30         if (!cgit_query_repo) {
  31                 item->name = xstrdup(fmt("%s/index.html", cgit_cache_root));
  32                 item->ttl = cgit_cache_root_ttl;
  33                 return 1;
  34         }
  35         cgit_repo = cgit_get_repoinfo(cgit_query_repo);
  36         if (!cgit_repo) {
  37                 char *title = fmt("%s - %s", cgit_root_title, "Bad request");
  38                 cgit_print_docstart(title, item);
  39                 cgit_print_pageheader(title, 0);
  40                 cgit_print_error(fmt("Unknown repo: %s", cgit_query_repo));
  41                 cgit_print_docend();
  42                 return 0;
  43         }
  44
  45         if (!cgit_query_page) {
  46                 item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root,
  47                            cgit_repo->url));
  48                 item->ttl = cgit_cache_repo_ttl;
  49         } else {
  50                 item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root,
  51                            cgit_repo->url, cgit_query_page,
  52                            cache_safe_filename(cgit_querystring)));
  53                 if (cgit_query_has_symref)
  54                         item->ttl = cgit_cache_dynamic_ttl;
  55                 else if (cgit_query_has_sha1)
  56                         item->ttl = cgit_cache_static_ttl;
  57                 else
  58                         item->ttl = cgit_cache_repo_ttl;
  59         }
  60         return 1;
  61 }
  62
  63 static void cgit_print_repo_page(struct cacheitem *item)
  64 {
  65         char *title;
  66         int show_search;
  67
  68         if (chdir(cgit_repo->path)) {
  69                 title = fmt("%s - %s", cgit_root_title, "Bad request");
  70                 cgit_print_docstart(title, item);
  71                 cgit_print_pageheader(title, 0);
  72                 cgit_print_error(fmt("Unable to scan repository: %s",
  73                                      strerror(errno)));
  74                 cgit_print_docend();
  75                 return;
  76         }
  77
  78         title = fmt("%s - %s", cgit_repo->name, cgit_repo->desc);
  79         show_search = 0;
  80         setenv("GIT_DIR", cgit_repo->path, 1);
  81         if (cgit_query_page && !strcmp(cgit_query_page, "log"))
  82                 show_search = 1;
  83         cgit_print_docstart(title, item);
  84         cgit_print_pageheader(title, show_search);
  85         if (!cgit_query_page) {
  86                 cgit_print_summary();
  87         } else if (!strcmp(cgit_query_page, "log")) {
  88                 cgit_print_log(cgit_query_head, cgit_query_ofs, 100, cgit_query_search);
  89         } else if (!strcmp(cgit_query_page, "tree")) {
  90                 cgit_print_tree(cgit_query_sha1, cgit_query_path);
  91         } else if (!strcmp(cgit_query_page, "commit")) {
  92                 cgit_print_commit(cgit_query_sha1);
  93         } else if (!strcmp(cgit_query_page, "view")) {
  94                 cgit_print_view(cgit_query_sha1);
  95         } else if (!strcmp(cgit_query_page, "diff")) {
  96                 cgit_print_diff(cgit_query_sha1, cgit_query_sha2);
  97         }
  98         cgit_print_docend();
  99 }
 100
 101 static void cgit_fill_cache(struct cacheitem *item)
 102 {
 103         static char buf[PATH_MAX];
 104
 105         getcwd(buf, sizeof(buf));
 106         htmlfd = item->fd;
 107         item->st.st_mtime = time(NULL);
 108         if (cgit_query_repo)
 109                 cgit_print_repo_page(item);
 110         else
 111                 cgit_print_repolist(item);
 112         chdir(buf);
 113 }
 114
 115 static void cgit_check_cache(struct cacheitem *item)
 116 {
 117         int i = 0;
 118
 119  top:
 120         if (++i > cgit_max_lock_attempts) {
 121                 die("cgit_refresh_cache: unable to lock %s: %s",
 122                     item->name, strerror(errno));
 123         }
 124         if (!cache_exist(item)) {
 125                 if (!cache_lock(item)) {
 126                         sleep(1);
 127                         goto top;
 128                 }
 129                 if (!cache_exist(item)) {
 130                         cgit_fill_cache(item);
 131                         cache_unlock(item);
 132                 } else {
 133                         cache_cancel_lock(item);
 134                 }
 135         } else if (cache_expired(item) && cache_lock(item)) {
 136                 if (cache_expired(item)) {
 137                         cgit_fill_cache(item);
 138                         cache_unlock(item);
 139                 } else {
 140                         cache_cancel_lock(item);
 141                 }
 142         }
 143 }
 144
 145 static void cgit_print_cache(struct cacheitem *item)
 146 {
 147         static char buf[4096];
 148         ssize_t i;
 149
 150         int fd = open(item->name, O_RDONLY);
 151         if (fd<0)
 152                 die("Unable to open cached file %s", item->name);
 153
 154         while((i=read(fd, buf, sizeof(buf))) > 0)
 155                 write(STDOUT_FILENO, buf, i);
 156
 157         close(fd);
 158 }
 159
 160 static void cgit_parse_args(int argc, const char **argv)
 161 {
 162         int i;
 163
 164         for (i = 1; i < argc; i++) {
 165                 if (!strncmp(argv[i], "--cache=", 8)) {
 166                         cgit_cache_root = xstrdup(argv[i]+8);
 167                 }
 168                 if (!strcmp(argv[i], "--nocache")) {
 169                         cgit_nocache = 1;
 170                 }
 171                 if (!strncmp(argv[i], "--query=", 8)) {
 172                         cgit_querystring = xstrdup(argv[i]+8);
 173                 }
 174                 if (!strncmp(argv[i], "--repo=", 7)) {
 175                         cgit_query_repo = xstrdup(argv[i]+7);
 176                 }
 177                 if (!strncmp(argv[i], "--page=", 7)) {
 178                         cgit_query_page = xstrdup(argv[i]+7);
 179                 }
 180                 if (!strncmp(argv[i], "--head=", 7)) {
 181                         cgit_query_head = xstrdup(argv[i]+7);
 182                         cgit_query_has_symref = 1;
 183                 }
 184                 if (!strncmp(argv[i], "--sha1=", 7)) {
 185                         cgit_query_sha1 = xstrdup(argv[i]+7);
 186                         cgit_query_has_sha1 = 1;
 187                 }
 188                 if (!strncmp(argv[i], "--ofs=", 6)) {
 189                         cgit_query_ofs = atoi(argv[i]+6);
 190                 }
 191         }
 192 }
 193
 194 int main(int argc, const char **argv)
 195 {
 196         struct cacheitem item;
 197
 198         htmlfd = STDOUT_FILENO;
 199         item.st.st_mtime = time(NULL);
 200         cgit_repolist.length = 0;
 201         cgit_repolist.count = 0;
 202         cgit_repolist.repos = NULL;
 203
 204         cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
 205         if (getenv("QUERY_STRING"))
 206                 cgit_querystring = xstrdup(getenv("QUERY_STRING"));
 207         cgit_parse_args(argc, argv);
 208         cgit_parse_query(cgit_querystring, cgit_querystring_cb);
 209         if (!cgit_prepare_cache(&item))
 210                 return 0;
 211         if (cgit_nocache) {
 212                 item.fd = STDOUT_FILENO;
 213                 cgit_fill_cache(&item);
 214         } else {
 215                 cgit_check_cache(&item);
 216                 cgit_print_cache(&item);
 217         }
 218         return 0;
 219 }