cgit.c (view raw)
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#include "cache.h"
11#include "cmd.h"
12#include "configfile.h"
13#include "html.h"
14#include "ui-shared.h"
15
16const char *cgit_version = CGIT_VERSION;
17
18void config_cb(const char *name, const char *value)
19{
20 if (!strcmp(name, "root-title"))
21 ctx.cfg.root_title = xstrdup(value);
22 else if (!strcmp(name, "root-desc"))
23 ctx.cfg.root_desc = xstrdup(value);
24 else if (!strcmp(name, "root-readme"))
25 ctx.cfg.root_readme = xstrdup(value);
26 else if (!strcmp(name, "css"))
27 ctx.cfg.css = xstrdup(value);
28 else if (!strcmp(name, "favicon"))
29 ctx.cfg.favicon = xstrdup(value);
30 else if (!strcmp(name, "footer"))
31 ctx.cfg.footer = xstrdup(value);
32 else if (!strcmp(name, "logo"))
33 ctx.cfg.logo = xstrdup(value);
34 else if (!strcmp(name, "index-header"))
35 ctx.cfg.index_header = xstrdup(value);
36 else if (!strcmp(name, "index-info"))
37 ctx.cfg.index_info = xstrdup(value);
38 else if (!strcmp(name, "logo-link"))
39 ctx.cfg.logo_link = xstrdup(value);
40 else if (!strcmp(name, "module-link"))
41 ctx.cfg.module_link = xstrdup(value);
42 else if (!strcmp(name, "virtual-root")) {
43 ctx.cfg.virtual_root = trim_end(value, '/');
44 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
45 ctx.cfg.virtual_root = "";
46 } else if (!strcmp(name, "nocache"))
47 ctx.cfg.nocache = atoi(value);
48 else if (!strcmp(name, "snapshots"))
49 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
50 else if (!strcmp(name, "enable-index-links"))
51 ctx.cfg.enable_index_links = atoi(value);
52 else if (!strcmp(name, "enable-log-filecount"))
53 ctx.cfg.enable_log_filecount = atoi(value);
54 else if (!strcmp(name, "enable-log-linecount"))
55 ctx.cfg.enable_log_linecount = atoi(value);
56 else if (!strcmp(name, "cache-size"))
57 ctx.cfg.cache_size = atoi(value);
58 else if (!strcmp(name, "cache-root"))
59 ctx.cfg.cache_root = xstrdup(value);
60 else if (!strcmp(name, "cache-root-ttl"))
61 ctx.cfg.cache_root_ttl = atoi(value);
62 else if (!strcmp(name, "cache-repo-ttl"))
63 ctx.cfg.cache_repo_ttl = atoi(value);
64 else if (!strcmp(name, "cache-static-ttl"))
65 ctx.cfg.cache_static_ttl = atoi(value);
66 else if (!strcmp(name, "cache-dynamic-ttl"))
67 ctx.cfg.cache_dynamic_ttl = atoi(value);
68 else if (!strcmp(name, "max-message-length"))
69 ctx.cfg.max_msg_len = atoi(value);
70 else if (!strcmp(name, "max-repodesc-length"))
71 ctx.cfg.max_repodesc_len = atoi(value);
72 else if (!strcmp(name, "max-repo-count"))
73 ctx.cfg.max_repo_count = atoi(value);
74 else if (!strcmp(name, "max-commit-count"))
75 ctx.cfg.max_commit_count = atoi(value);
76 else if (!strcmp(name, "summary-log"))
77 ctx.cfg.summary_log = atoi(value);
78 else if (!strcmp(name, "summary-branches"))
79 ctx.cfg.summary_branches = atoi(value);
80 else if (!strcmp(name, "summary-tags"))
81 ctx.cfg.summary_tags = atoi(value);
82 else if (!strcmp(name, "agefile"))
83 ctx.cfg.agefile = xstrdup(value);
84 else if (!strcmp(name, "renamelimit"))
85 ctx.cfg.renamelimit = atoi(value);
86 else if (!strcmp(name, "robots"))
87 ctx.cfg.robots = xstrdup(value);
88 else if (!strcmp(name, "clone-prefix"))
89 ctx.cfg.clone_prefix = xstrdup(value);
90 else if (!strcmp(name, "local-time"))
91 ctx.cfg.local_time = atoi(value);
92 else if (!strcmp(name, "repo.group"))
93 ctx.cfg.repo_group = xstrdup(value);
94 else if (!strcmp(name, "repo.url"))
95 ctx.repo = cgit_add_repo(value);
96 else if (!strcmp(name, "repo.name"))
97 ctx.repo->name = xstrdup(value);
98 else if (ctx.repo && !strcmp(name, "repo.path"))
99 ctx.repo->path = trim_end(value, '/');
100 else if (ctx.repo && !strcmp(name, "repo.clone-url"))
101 ctx.repo->clone_url = xstrdup(value);
102 else if (ctx.repo && !strcmp(name, "repo.desc"))
103 ctx.repo->desc = xstrdup(value);
104 else if (ctx.repo && !strcmp(name, "repo.owner"))
105 ctx.repo->owner = xstrdup(value);
106 else if (ctx.repo && !strcmp(name, "repo.defbranch"))
107 ctx.repo->defbranch = xstrdup(value);
108 else if (ctx.repo && !strcmp(name, "repo.snapshots"))
109 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
110 else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
111 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
112 else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
113 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
114 else if (ctx.repo && !strcmp(name, "repo.module-link"))
115 ctx.repo->module_link= xstrdup(value);
116 else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
117 if (*value == '/')
118 ctx.repo->readme = xstrdup(value);
119 else
120 ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
121 } else if (!strcmp(name, "include"))
122 parse_configfile(value, config_cb);
123}
124
125static void querystring_cb(const char *name, const char *value)
126{
127 if (!strcmp(name,"r")) {
128 ctx.qry.repo = xstrdup(value);
129 ctx.repo = cgit_get_repoinfo(value);
130 } else if (!strcmp(name, "p")) {
131 ctx.qry.page = xstrdup(value);
132 } else if (!strcmp(name, "url")) {
133 ctx.qry.url = xstrdup(value);
134 cgit_parse_url(value);
135 } else if (!strcmp(name, "qt")) {
136 ctx.qry.grep = xstrdup(value);
137 } else if (!strcmp(name, "q")) {
138 ctx.qry.search = xstrdup(value);
139 } else if (!strcmp(name, "h")) {
140 ctx.qry.head = xstrdup(value);
141 ctx.qry.has_symref = 1;
142 } else if (!strcmp(name, "id")) {
143 ctx.qry.sha1 = xstrdup(value);
144 ctx.qry.has_sha1 = 1;
145 } else if (!strcmp(name, "id2")) {
146 ctx.qry.sha2 = xstrdup(value);
147 ctx.qry.has_sha1 = 1;
148 } else if (!strcmp(name, "ofs")) {
149 ctx.qry.ofs = atoi(value);
150 } else if (!strcmp(name, "path")) {
151 ctx.qry.path = trim_end(value, '/');
152 } else if (!strcmp(name, "name")) {
153 ctx.qry.name = xstrdup(value);
154 } else if (!strcmp(name, "mimetype")) {
155 ctx.qry.mimetype = xstrdup(value);
156 }
157}
158
159static void prepare_context(struct cgit_context *ctx)
160{
161 memset(ctx, 0, sizeof(ctx));
162 ctx->cfg.agefile = "info/web/last-modified";
163 ctx->cfg.nocache = 0;
164 ctx->cfg.cache_size = 0;
165 ctx->cfg.cache_dynamic_ttl = 5;
166 ctx->cfg.cache_max_create_time = 5;
167 ctx->cfg.cache_repo_ttl = 5;
168 ctx->cfg.cache_root = CGIT_CACHE_ROOT;
169 ctx->cfg.cache_root_ttl = 5;
170 ctx->cfg.cache_static_ttl = -1;
171 ctx->cfg.css = "/cgit.css";
172 ctx->cfg.logo = "/git-logo.png";
173 ctx->cfg.local_time = 0;
174 ctx->cfg.max_repo_count = 50;
175 ctx->cfg.max_commit_count = 50;
176 ctx->cfg.max_lock_attempts = 5;
177 ctx->cfg.max_msg_len = 80;
178 ctx->cfg.max_repodesc_len = 80;
179 ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
180 ctx->cfg.renamelimit = -1;
181 ctx->cfg.robots = "index, nofollow";
182 ctx->cfg.root_title = "Git repository browser";
183 ctx->cfg.root_desc = "a fast webinterface for the git dscm";
184 ctx->cfg.script_name = CGIT_SCRIPT_NAME;
185 ctx->cfg.summary_branches = 10;
186 ctx->cfg.summary_log = 10;
187 ctx->cfg.summary_tags = 10;
188 ctx->page.mimetype = "text/html";
189 ctx->page.charset = PAGE_ENCODING;
190 ctx->page.filename = NULL;
191 ctx->page.size = 0;
192 ctx->page.modified = time(NULL);
193 ctx->page.expires = ctx->page.modified;
194}
195
196struct refmatch {
197 char *req_ref;
198 char *first_ref;
199 int match;
200};
201
202int find_current_ref(const char *refname, const unsigned char *sha1,
203 int flags, void *cb_data)
204{
205 struct refmatch *info;
206
207 info = (struct refmatch *)cb_data;
208 if (!strcmp(refname, info->req_ref))
209 info->match = 1;
210 if (!info->first_ref)
211 info->first_ref = xstrdup(refname);
212 return info->match;
213}
214
215char *find_default_branch(struct cgit_repo *repo)
216{
217 struct refmatch info;
218 char *ref;
219
220 info.req_ref = repo->defbranch;
221 info.first_ref = NULL;
222 info.match = 0;
223 for_each_branch_ref(find_current_ref, &info);
224 if (info.match)
225 ref = info.req_ref;
226 else
227 ref = info.first_ref;
228 if (ref)
229 ref = xstrdup(ref);
230 return ref;
231}
232
233static int prepare_repo_cmd(struct cgit_context *ctx)
234{
235 char *tmp;
236 unsigned char sha1[20];
237 int nongit = 0;
238
239 setenv("GIT_DIR", ctx->repo->path, 1);
240 setup_git_directory_gently(&nongit);
241 if (nongit) {
242 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
243 "config error");
244 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
245 ctx->repo = NULL;
246 cgit_print_http_headers(ctx);
247 cgit_print_docstart(ctx);
248 cgit_print_pageheader(ctx);
249 cgit_print_error(tmp);
250 cgit_print_docend();
251 return 1;
252 }
253 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
254
255 if (!ctx->qry.head) {
256 ctx->qry.head = find_default_branch(ctx->repo);
257 ctx->repo->defbranch = ctx->qry.head;
258 }
259
260 if (!ctx->qry.head) {
261 cgit_print_http_headers(ctx);
262 cgit_print_docstart(ctx);
263 cgit_print_pageheader(ctx);
264 cgit_print_error("Repository seems to be empty");
265 cgit_print_docend();
266 return 1;
267 }
268
269 if (get_sha1(ctx->qry.head, sha1)) {
270 tmp = xstrdup(ctx->qry.head);
271 ctx->qry.head = ctx->repo->defbranch;
272 cgit_print_http_headers(ctx);
273 cgit_print_docstart(ctx);
274 cgit_print_pageheader(ctx);
275 cgit_print_error(fmt("Invalid branch: %s", tmp));
276 cgit_print_docend();
277 return 1;
278 }
279 return 0;
280}
281
282static void process_request(void *cbdata)
283{
284 struct cgit_context *ctx = cbdata;
285 struct cgit_cmd *cmd;
286
287 cmd = cgit_get_cmd(ctx);
288 if (!cmd) {
289 ctx->page.title = "cgit error";
290 ctx->repo = NULL;
291 cgit_print_http_headers(ctx);
292 cgit_print_docstart(ctx);
293 cgit_print_pageheader(ctx);
294 cgit_print_error("Invalid request");
295 cgit_print_docend();
296 return;
297 }
298
299 if (cmd->want_repo && !ctx->repo) {
300 cgit_print_http_headers(ctx);
301 cgit_print_docstart(ctx);
302 cgit_print_pageheader(ctx);
303 cgit_print_error(fmt("No repository selected"));
304 cgit_print_docend();
305 return;
306 }
307
308 if (ctx->repo && prepare_repo_cmd(ctx))
309 return;
310
311 if (cmd->want_layout) {
312 cgit_print_http_headers(ctx);
313 cgit_print_docstart(ctx);
314 cgit_print_pageheader(ctx);
315 }
316
317 cmd->fn(ctx);
318
319 if (cmd->want_layout)
320 cgit_print_docend();
321}
322
323static void cgit_parse_args(int argc, const char **argv)
324{
325 int i;
326
327 for (i = 1; i < argc; i++) {
328 if (!strncmp(argv[i], "--cache=", 8)) {
329 ctx.cfg.cache_root = xstrdup(argv[i]+8);
330 }
331 if (!strcmp(argv[i], "--nocache")) {
332 ctx.cfg.nocache = 1;
333 }
334 if (!strncmp(argv[i], "--query=", 8)) {
335 ctx.qry.raw = xstrdup(argv[i]+8);
336 }
337 if (!strncmp(argv[i], "--repo=", 7)) {
338 ctx.qry.repo = xstrdup(argv[i]+7);
339 }
340 if (!strncmp(argv[i], "--page=", 7)) {
341 ctx.qry.page = xstrdup(argv[i]+7);
342 }
343 if (!strncmp(argv[i], "--head=", 7)) {
344 ctx.qry.head = xstrdup(argv[i]+7);
345 ctx.qry.has_symref = 1;
346 }
347 if (!strncmp(argv[i], "--sha1=", 7)) {
348 ctx.qry.sha1 = xstrdup(argv[i]+7);
349 ctx.qry.has_sha1 = 1;
350 }
351 if (!strncmp(argv[i], "--ofs=", 6)) {
352 ctx.qry.ofs = atoi(argv[i]+6);
353 }
354 }
355}
356
357static int calc_ttl()
358{
359 if (!ctx.repo)
360 return ctx.cfg.cache_root_ttl;
361
362 if (!ctx.qry.page)
363 return ctx.cfg.cache_repo_ttl;
364
365 if (ctx.qry.has_symref)
366 return ctx.cfg.cache_dynamic_ttl;
367
368 if (ctx.qry.has_sha1)
369 return ctx.cfg.cache_static_ttl;
370
371 return ctx.cfg.cache_repo_ttl;
372}
373
374int main(int argc, const char **argv)
375{
376 const char *cgit_config_env = getenv("CGIT_CONFIG");
377 const char *path;
378 char *qry;
379 int err, ttl;
380
381 prepare_context(&ctx);
382 cgit_repolist.length = 0;
383 cgit_repolist.count = 0;
384 cgit_repolist.repos = NULL;
385
386 parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
387 config_cb);
388 ctx.repo = NULL;
389 if (getenv("SCRIPT_NAME"))
390 ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
391 if (getenv("QUERY_STRING"))
392 ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
393 cgit_parse_args(argc, argv);
394 http_parse_querystring(ctx.qry.raw, querystring_cb);
395
396 /* If virtual-root isn't specified in cgitrc and no url
397 * parameter is specified on the querystring, lets pretend
398 * that virtualroot equals SCRIPT_NAME and use PATH_INFO as
399 * url. This allows cgit to work with virtual urls without
400 * the need for rewriterules in the webserver (as long as
401 * PATH_INFO is included in the cache lookup key).
402 */
403 if (!ctx.cfg.virtual_root && !ctx.qry.url) {
404 ctx.cfg.virtual_root = ctx.cfg.script_name;
405 path = getenv("PATH_INFO");
406 if (path) {
407 if (path[0] == '/')
408 path++;
409 ctx.qry.url = xstrdup(path);
410 if (ctx.qry.raw) {
411 qry = ctx.qry.raw;
412 ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
413 free(qry);
414 } else
415 ctx.qry.raw = ctx.qry.url;
416 cgit_parse_url(ctx.qry.url);
417 }
418 }
419
420 ttl = calc_ttl();
421 ctx.page.expires += ttl*60;
422 if (ctx.cfg.nocache)
423 ctx.cfg.cache_size = 0;
424 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
425 ctx.qry.raw, ttl, process_request, &ctx);
426 if (err)
427 cgit_print_error(fmt("Error processing page: %s (%d)",
428 strerror(err), err));
429 return err;
430}