1 /* cgit.c: cgi for the git scm
3 * Copyright (C) 2006 Lars Hjemli
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
12 static int cgit_prepare_cache(struct cacheitem *item)
14 if (!ctx.repo && ctx.qry.repo) {
15 ctx.page.title = fmt("%s - %s", ctx.cfg.root_title,
17 cgit_print_http_headers(&ctx);
18 cgit_print_docstart(&ctx);
19 cgit_print_pageheader(&ctx);
20 cgit_print_error(fmt("Unknown repo: %s", ctx.qry.repo));
26 item->name = xstrdup(fmt("%s/index.html", ctx.cfg.cache_root));
27 item->ttl = ctx.cfg.cache_root_ttl;
32 item->name = xstrdup(fmt("%s/%s/index.%s.html", ctx.cfg.cache_root,
33 cache_safe_filename(ctx.repo->url),
34 cache_safe_filename(ctx.qry.raw)));
35 item->ttl = ctx.cfg.cache_repo_ttl;
37 item->name = xstrdup(fmt("%s/%s/%s/%s.html", ctx.cfg.cache_root,
38 cache_safe_filename(ctx.repo->url),
40 cache_safe_filename(ctx.qry.raw)));
41 if (ctx.qry.has_symref)
42 item->ttl = ctx.cfg.cache_dynamic_ttl;
43 else if (ctx.qry.has_sha1)
44 item->ttl = ctx.cfg.cache_static_ttl;
46 item->ttl = ctx.cfg.cache_repo_ttl;
57 int find_current_ref(const char *refname, const unsigned char *sha1,
58 int flags, void *cb_data)
60 struct refmatch *info;
62 info = (struct refmatch *)cb_data;
63 if (!strcmp(refname, info->req_ref))
66 info->first_ref = xstrdup(refname);
70 char *find_default_branch(struct cgit_repo *repo)
74 info.req_ref = repo->defbranch;
75 info.first_ref = NULL;
77 for_each_branch_ref(find_current_ref, &info);
81 return info.first_ref;
84 static int prepare_repo_cmd(struct cgit_context *ctx)
87 unsigned char sha1[20];
90 setenv("GIT_DIR", ctx->repo->path, 1);
91 setup_git_directory_gently(&nongit);
93 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
95 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
97 cgit_print_http_headers(ctx);
98 cgit_print_docstart(ctx);
99 cgit_print_pageheader(ctx);
100 cgit_print_error(tmp);
104 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
106 if (!ctx->qry.head) {
107 ctx->qry.head = xstrdup(find_default_branch(ctx->repo));
108 ctx->repo->defbranch = ctx->qry.head;
111 if (!ctx->qry.head) {
112 cgit_print_http_headers(ctx);
113 cgit_print_docstart(ctx);
114 cgit_print_pageheader(ctx);
115 cgit_print_error("Repository seems to be empty");
120 if (get_sha1(ctx->qry.head, sha1)) {
121 tmp = xstrdup(ctx->qry.head);
122 ctx->qry.head = ctx->repo->defbranch;
123 cgit_print_http_headers(ctx);
124 cgit_print_docstart(ctx);
125 cgit_print_pageheader(ctx);
126 cgit_print_error(fmt("Invalid branch: %s", tmp));
133 static void process_request(struct cgit_context *ctx)
135 struct cgit_cmd *cmd;
137 cmd = cgit_get_cmd(ctx);
139 ctx->page.title = "cgit error";
141 cgit_print_http_headers(ctx);
142 cgit_print_docstart(ctx);
143 cgit_print_pageheader(ctx);
144 cgit_print_error("Invalid request");
149 if (cmd->want_repo && prepare_repo_cmd(ctx))
152 if (cmd->want_layout) {
153 cgit_print_http_headers(ctx);
154 cgit_print_docstart(ctx);
155 cgit_print_pageheader(ctx);
160 if (cmd->want_layout)
164 static long ttl_seconds(long ttl)
167 return 60 * 60 * 24 * 365;
172 static void cgit_fill_cache(struct cacheitem *item, int use_cache)
177 stdout2 = chk_positive(dup(STDOUT_FILENO),
178 "Preserving STDOUT");
179 chk_zero(close(STDOUT_FILENO), "Closing STDOUT");
180 chk_positive(dup2(item->fd, STDOUT_FILENO), "Dup2(cachefile)");
183 ctx.page.modified = time(NULL);
184 ctx.page.expires = ctx.page.modified + ttl_seconds(item->ttl);
185 process_request(&ctx);
188 chk_zero(close(STDOUT_FILENO), "Close redirected STDOUT");
189 chk_positive(dup2(stdout2, STDOUT_FILENO),
190 "Restoring original STDOUT");
191 chk_zero(close(stdout2), "Closing temporary STDOUT");
195 static void cgit_check_cache(struct cacheitem *item)
200 if (++i > ctx.cfg.max_lock_attempts) {
201 die("cgit_refresh_cache: unable to lock %s: %s",
202 item->name, strerror(errno));
204 if (!cache_exist(item)) {
205 if (!cache_lock(item)) {
209 if (!cache_exist(item)) {
210 cgit_fill_cache(item, 1);
213 cache_cancel_lock(item);
215 } else if (cache_expired(item) && cache_lock(item)) {
216 if (cache_expired(item)) {
217 cgit_fill_cache(item, 1);
220 cache_cancel_lock(item);
225 static void cgit_print_cache(struct cacheitem *item)
227 static char buf[4096];
230 int fd = open(item->name, O_RDONLY);
232 die("Unable to open cached file %s", item->name);
234 while((i=read(fd, buf, sizeof(buf))) > 0)
235 write(STDOUT_FILENO, buf, i);
240 static void cgit_parse_args(int argc, const char **argv)
244 for (i = 1; i < argc; i++) {
245 if (!strncmp(argv[i], "--cache=", 8)) {
246 ctx.cfg.cache_root = xstrdup(argv[i]+8);
248 if (!strcmp(argv[i], "--nocache")) {
251 if (!strncmp(argv[i], "--query=", 8)) {
252 ctx.qry.raw = xstrdup(argv[i]+8);
254 if (!strncmp(argv[i], "--repo=", 7)) {
255 ctx.qry.repo = xstrdup(argv[i]+7);
257 if (!strncmp(argv[i], "--page=", 7)) {
258 ctx.qry.page = xstrdup(argv[i]+7);
260 if (!strncmp(argv[i], "--head=", 7)) {
261 ctx.qry.head = xstrdup(argv[i]+7);
262 ctx.qry.has_symref = 1;
264 if (!strncmp(argv[i], "--sha1=", 7)) {
265 ctx.qry.sha1 = xstrdup(argv[i]+7);
266 ctx.qry.has_sha1 = 1;
268 if (!strncmp(argv[i], "--ofs=", 6)) {
269 ctx.qry.ofs = atoi(argv[i]+6);
274 int main(int argc, const char **argv)
276 struct cacheitem item;
277 const char *cgit_config_env = getenv("CGIT_CONFIG");
279 cgit_prepare_context(&ctx);
280 item.st.st_mtime = time(NULL);
281 cgit_repolist.length = 0;
282 cgit_repolist.count = 0;
283 cgit_repolist.repos = NULL;
285 cgit_read_config(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
286 cgit_global_config_cb);
287 if (getenv("SCRIPT_NAME"))
288 ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
289 if (getenv("QUERY_STRING"))
290 ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
291 cgit_parse_args(argc, argv);
292 cgit_parse_query(ctx.qry.raw, cgit_querystring_cb);
293 if (!cgit_prepare_cache(&item))
295 if (ctx.cfg.nocache) {
296 cgit_fill_cache(&item, 0);
298 cgit_check_cache(&item);
299 cgit_print_cache(&item);