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 static void cgit_print_repo_page(struct cacheitem *item)
  14 {
  15         if (chdir(fmt("%s/%s", cgit_root, cgit_query_repo)) ||
  16             cgit_read_config("info/cgit", cgit_repo_config_cb)) {
  17                 char *title = fmt("%s - %s", cgit_root_title, "Bad request");
  18                 cgit_print_docstart(title, item);
  19                 cgit_print_pageheader(title);
  20                 cgit_print_error(fmt("Unable to scan repository: %s",
  21                                      strerror(errno)));
  22                 cgit_print_docend();
  23                 return;
  24         }
  25         setenv("GIT_DIR", fmt("%s/%s", cgit_root, cgit_query_repo), 1);
  26         char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
  27         cgit_print_docstart(title, item);
  28         cgit_print_pageheader(title);
  29         if (!cgit_query_page) {
  30                 cgit_print_summary();
  31         } else if (!strcmp(cgit_query_page, "log")) {
  32                 cgit_print_log(cgit_query_head, cgit_query_ofs, 100);
  33         } else if (!strcmp(cgit_query_page, "tree")) {
  34                 cgit_print_tree(cgit_query_sha1);
  35         } else if (!strcmp(cgit_query_page, "commit")) {
  36                 cgit_print_commit(cgit_query_sha1);
  37         } else if (!strcmp(cgit_query_page, "view")) {
  38                 cgit_print_view(cgit_query_sha1);
  39         }
  40         cgit_print_docend();
  41 }
  42
  43 static void cgit_fill_cache(struct cacheitem *item)
  44 {
  45         static char buf[PATH_MAX];
  46
  47         getcwd(buf, sizeof(buf));
  48         htmlfd = item->fd;
  49         item->st.st_mtime = time(NULL);
  50         if (cgit_query_repo)
  51                 cgit_print_repo_page(item);
  52         else
  53                 cgit_print_repolist(item);
  54         chdir(buf);
  55 }
  56
  57 static void cgit_check_cache(struct cacheitem *item)
  58 {
  59         int i = 0;
  60
  61         cache_prepare(item);
  62  top:
  63         if (++i > cgit_max_lock_attempts) {
  64                 die("cgit_refresh_cache: unable to lock %s: %s",
  65                     item->name, strerror(errno));
  66         }
  67         if (!cache_exist(item)) {
  68                 if (!cache_lock(item)) {
  69                         sleep(1);
  70                         goto top;
  71                 }
  72                 if (!cache_exist(item)) {
  73                         cgit_fill_cache(item);
  74                         cache_unlock(item);
  75                 } else {
  76                         cache_cancel_lock(item);
  77                 }
  78         } else if (cache_expired(item) && cache_lock(item)) {
  79                 if (cache_expired(item)) {
  80                         cgit_fill_cache(item);
  81                         cache_unlock(item);
  82                 } else {
  83                         cache_cancel_lock(item);
  84                 }
  85         }
  86 }
  87
  88 static void cgit_print_cache(struct cacheitem *item)
  89 {
  90         static char buf[4096];
  91         ssize_t i;
  92
  93         int fd = open(item->name, O_RDONLY);
  94         if (fd<0)
  95                 die("Unable to open cached file %s", item->name);
  96
  97         while((i=read(fd, buf, sizeof(buf))) > 0)
  98                 write(STDOUT_FILENO, buf, i);
  99
 100         close(fd);
 101 }
 102
 103 static void cgit_parse_args(int argc, const char **argv)
 104 {
 105         int i;
 106
 107         for (i = 1; i < argc; i++) {
 108                 if (!strncmp(argv[i], "--root=", 7)) {
 109                         cgit_root = xstrdup(argv[i]+7);
 110                 }
 111                 if (!strncmp(argv[i], "--cache=", 8)) {
 112                         cgit_cache_root = xstrdup(argv[i]+8);
 113                 }
 114                 if (!strcmp(argv[i], "--nocache")) {
 115                         cgit_nocache = 1;
 116                 }
 117                 if (!strncmp(argv[i], "--query=", 8)) {
 118                         cgit_querystring = xstrdup(argv[i]+8);
 119                 }
 120                 if (!strncmp(argv[i], "--repo=", 7)) {
 121                         cgit_query_repo = xstrdup(argv[i]+7);
 122                 }
 123                 if (!strncmp(argv[i], "--page=", 7)) {
 124                         cgit_query_page = xstrdup(argv[i]+7);
 125                 }
 126                 if (!strncmp(argv[i], "--head=", 7)) {
 127                         cgit_query_head = xstrdup(argv[i]+7);
 128                         cgit_query_has_symref = 1;
 129                 }
 130                 if (!strncmp(argv[i], "--sha1=", 7)) {
 131                         cgit_query_sha1 = xstrdup(argv[i]+7);
 132                         cgit_query_has_sha1 = 1;
 133                 }
 134                 if (!strncmp(argv[i], "--ofs=", 6)) {
 135                         cgit_query_ofs = atoi(argv[i]+6);
 136                 }
 137         }
 138 }
 139
 140 int main(int argc, const char **argv)
 141 {
 142         struct cacheitem item;
 143
 144         cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
 145         if (getenv("QUERY_STRING"))
 146                 cgit_querystring = xstrdup(getenv("QUERY_STRING"));
 147         cgit_parse_args(argc, argv);
 148         cgit_parse_query(cgit_querystring, cgit_querystring_cb);
 149
 150         if (cgit_nocache) {
 151                 item.fd = STDOUT_FILENO;
 152                 cgit_fill_cache(&item);
 153         } else {
 154                 cgit_check_cache(&item);
 155                 cgit_print_cache(&item);
 156         }
 157         return 0;
 158 }