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#include "scan-tree.h"
16
17const char *cgit_version = CGIT_VERSION;
18
19void config_cb(const char *name, const char *value)
20{
21 if (!strcmp(name, "root-title"))
22 ctx.cfg.root_title = xstrdup(value);
23 else if (!strcmp(name, "root-desc"))
24 ctx.cfg.root_desc = xstrdup(value);
25 else if (!strcmp(name, "root-readme"))
26 ctx.cfg.root_readme = xstrdup(value);
27 else if (!strcmp(name, "css"))
28 ctx.cfg.css = xstrdup(value);
29 else if (!strcmp(name, "favicon"))
30 ctx.cfg.favicon = xstrdup(value);
31 else if (!strcmp(name, "footer"))
32 ctx.cfg.footer = xstrdup(value);
33 else if (!strcmp(name, "logo"))
34 ctx.cfg.logo = xstrdup(value);
35 else if (!strcmp(name, "index-header"))
36 ctx.cfg.index_header = xstrdup(value);
37 else if (!strcmp(name, "index-info"))
38 ctx.cfg.index_info = xstrdup(value);
39 else if (!strcmp(name, "logo-link"))
40 ctx.cfg.logo_link = xstrdup(value);
41 else if (!strcmp(name, "module-link"))
42 ctx.cfg.module_link = xstrdup(value);
43 else if (!strcmp(name, "virtual-root")) {
44 ctx.cfg.virtual_root = trim_end(value, '/');
45 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
46 ctx.cfg.virtual_root = "";
47 } else if (!strcmp(name, "nocache"))
48 ctx.cfg.nocache = atoi(value);
49 else if (!strcmp(name, "snapshots"))
50 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
51 else if (!strcmp(name, "enable-index-links"))
52 ctx.cfg.enable_index_links = atoi(value);
53 else if (!strcmp(name, "enable-log-filecount"))
54 ctx.cfg.enable_log_filecount = atoi(value);
55 else if (!strcmp(name, "enable-log-linecount"))
56 ctx.cfg.enable_log_linecount = atoi(value);
57 else if (!strcmp(name, "cache-size"))
58 ctx.cfg.cache_size = atoi(value);
59 else if (!strcmp(name, "cache-root"))
60 ctx.cfg.cache_root = xstrdup(value);
61 else if (!strcmp(name, "cache-root-ttl"))
62 ctx.cfg.cache_root_ttl = atoi(value);
63 else if (!strcmp(name, "cache-repo-ttl"))
64 ctx.cfg.cache_repo_ttl = atoi(value);
65 else if (!strcmp(name, "cache-static-ttl"))
66 ctx.cfg.cache_static_ttl = atoi(value);
67 else if (!strcmp(name, "cache-dynamic-ttl"))
68 ctx.cfg.cache_dynamic_ttl = atoi(value);
69 else if (!strcmp(name, "max-message-length"))
70 ctx.cfg.max_msg_len = atoi(value);
71 else if (!strcmp(name, "max-repodesc-length"))
72 ctx.cfg.max_repodesc_len = atoi(value);
73 else if (!strcmp(name, "max-repo-count"))
74 ctx.cfg.max_repo_count = atoi(value);
75 else if (!strcmp(name, "max-commit-count"))
76 ctx.cfg.max_commit_count = atoi(value);
77 else if (!strcmp(name, "summary-log"))
78 ctx.cfg.summary_log = atoi(value);
79 else if (!strcmp(name, "summary-branches"))
80 ctx.cfg.summary_branches = atoi(value);
81 else if (!strcmp(name, "summary-tags"))
82 ctx.cfg.summary_tags = atoi(value);
83 else if (!strcmp(name, "agefile"))
84 ctx.cfg.agefile = xstrdup(value);
85 else if (!strcmp(name, "renamelimit"))
86 ctx.cfg.renamelimit = atoi(value);
87 else if (!strcmp(name, "robots"))
88 ctx.cfg.robots = xstrdup(value);
89 else if (!strcmp(name, "clone-prefix"))
90 ctx.cfg.clone_prefix = xstrdup(value);
91 else if (!strcmp(name, "local-time"))
92 ctx.cfg.local_time = atoi(value);
93 else if (!strcmp(name, "repo.group"))
94 ctx.cfg.repo_group = xstrdup(value);
95 else if (!strcmp(name, "repo.url"))
96 ctx.repo = cgit_add_repo(value);
97 else if (!strcmp(name, "repo.name"))
98 ctx.repo->name = xstrdup(value);
99 else if (ctx.repo && !strcmp(name, "repo.path"))
100 ctx.repo->path = trim_end(value, '/');
101 else if (ctx.repo && !strcmp(name, "repo.clone-url"))
102 ctx.repo->clone_url = xstrdup(value);
103 else if (ctx.repo && !strcmp(name, "repo.desc"))
104 ctx.repo->desc = xstrdup(value);
105 else if (ctx.repo && !strcmp(name, "repo.owner"))
106 ctx.repo->owner = xstrdup(value);
107 else if (ctx.repo && !strcmp(name, "repo.defbranch"))
108 ctx.repo->defbranch = xstrdup(value);
109 else if (ctx.repo && !strcmp(name, "repo.snapshots"))
110 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
111 else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
112 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
113 else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
114 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
115 else if (ctx.repo && !strcmp(name, "repo.module-link"))
116 ctx.repo->module_link= xstrdup(value);
117 else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
118 if (*value == '/')
119 ctx.repo->readme = xstrdup(value);
120 else
121 ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
122 } else if (!strcmp(name, "include"))
123 parse_configfile(value, config_cb);
124}
125
126static void querystring_cb(const char *name, const char *value)
127{
128 if (!strcmp(name,"r")) {
129 ctx.qry.repo = xstrdup(value);
130 ctx.repo = cgit_get_repoinfo(value);
131 } else if (!strcmp(name, "p")) {
132 ctx.qry.page = xstrdup(value);
133 } else if (!strcmp(name, "url")) {
134 ctx.qry.url = xstrdup(value);
135 cgit_parse_url(value);
136 } else if (!strcmp(name, "qt")) {
137 ctx.qry.grep = xstrdup(value);
138 } else if (!strcmp(name, "q")) {
139 ctx.qry.search = xstrdup(value);
140 } else if (!strcmp(name, "h")) {
141 ctx.qry.head = xstrdup(value);
142 ctx.qry.has_symref = 1;
143 } else if (!strcmp(name, "id")) {
144 ctx.qry.sha1 = xstrdup(value);
145 ctx.qry.has_sha1 = 1;
146 } else if (!strcmp(name, "id2")) {
147 ctx.qry.sha2 = xstrdup(value);
148 ctx.qry.has_sha1 = 1;
149 } else if (!strcmp(name, "ofs")) {
150 ctx.qry.ofs = atoi(value);
151 } else if (!strcmp(name, "path")) {
152 ctx.qry.path = trim_end(value, '/');
153 } else if (!strcmp(name, "name")) {
154 ctx.qry.name = xstrdup(value);
155 } else if (!strcmp(name, "mimetype")) {
156 ctx.qry.mimetype = xstrdup(value);
157 }
158}
159
160static void prepare_context(struct cgit_context *ctx)
161{
162 memset(ctx, 0, sizeof(ctx));
163 ctx->cfg.agefile = "info/web/last-modified";
164 ctx->cfg.nocache = 0;
165 ctx->cfg.cache_size = 0;
166 ctx->cfg.cache_dynamic_ttl = 5;
167 ctx->cfg.cache_max_create_time = 5;
168 ctx->cfg.cache_repo_ttl = 5;
169 ctx->cfg.cache_root = CGIT_CACHE_ROOT;
170 ctx->cfg.cache_root_ttl = 5;
171 ctx->cfg.cache_static_ttl = -1;
172 ctx->cfg.css = "/cgit.css";
173 ctx->cfg.logo = "/git-logo.png";
174 ctx->cfg.local_time = 0;
175 ctx->cfg.max_repo_count = 50;
176 ctx->cfg.max_commit_count = 50;
177 ctx->cfg.max_lock_attempts = 5;
178 ctx->cfg.max_msg_len = 80;
179 ctx->cfg.max_repodesc_len = 80;
180 ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
181 ctx->cfg.renamelimit = -1;
182 ctx->cfg.robots = "index, nofollow";
183 ctx->cfg.root_title = "Git repository browser";
184 ctx->cfg.root_desc = "a fast webinterface for the git dscm";
185 ctx->cfg.script_name = CGIT_SCRIPT_NAME;
186 ctx->cfg.summary_branches = 10;
187 ctx->cfg.summary_log = 10;
188 ctx->cfg.summary_tags = 10;
189 ctx->page.mimetype = "text/html";
190 ctx->page.charset = PAGE_ENCODING;
191 ctx->page.filename = NULL;
192 ctx->page.size = 0;
193 ctx->page.modified = time(NULL);
194 ctx->page.expires = ctx->page.modified;
195}
196
197struct refmatch {
198 char *req_ref;
199 char *first_ref;
200 int match;
201};
202
203int find_current_ref(const char *refname, const unsigned char *sha1,
204 int flags, void *cb_data)
205{
206 struct refmatch *info;
207
208 info = (struct refmatch *)cb_data;
209 if (!strcmp(refname, info->req_ref))
210 info->match = 1;
211 if (!info->first_ref)
212 info->first_ref = xstrdup(refname);
213 return info->match;
214}
215
216char *find_default_branch(struct cgit_repo *repo)
217{
218 struct refmatch info;
219 char *ref;
220
221 info.req_ref = repo->defbranch;
222 info.first_ref = NULL;
223 info.match = 0;
224 for_each_branch_ref(find_current_ref, &info);
225 if (info.match)
226 ref = info.req_ref;
227 else
228 ref = info.first_ref;
229 if (ref)
230 ref = xstrdup(ref);
231 return ref;
232}
233
234static int prepare_repo_cmd(struct cgit_context *ctx)
235{
236 char *tmp;
237 unsigned char sha1[20];
238 int nongit = 0;
239
240 setenv("GIT_DIR", ctx->repo->path, 1);
241 setup_git_directory_gently(&nongit);
242 if (nongit) {
243 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
244 "config error");
245 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
246 ctx->repo = NULL;
247 cgit_print_http_headers(ctx);
248 cgit_print_docstart(ctx);
249 cgit_print_pageheader(ctx);
250 cgit_print_error(tmp);
251 cgit_print_docend();
252 return 1;
253 }
254 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
255
256 if (!ctx->qry.head) {
257 ctx->qry.nohead = 1;
258 ctx->qry.head = find_default_branch(ctx->repo);
259 ctx->repo->defbranch = ctx->qry.head;
260 }
261
262 if (!ctx->qry.head) {
263 cgit_print_http_headers(ctx);
264 cgit_print_docstart(ctx);
265 cgit_print_pageheader(ctx);
266 cgit_print_error("Repository seems to be empty");
267 cgit_print_docend();
268 return 1;
269 }
270
271 if (get_sha1(ctx->qry.head, sha1)) {
272 tmp = xstrdup(ctx->qry.head);
273 ctx->qry.head = ctx->repo->defbranch;
274 cgit_print_http_headers(ctx);
275 cgit_print_docstart(ctx);
276 cgit_print_pageheader(ctx);
277 cgit_print_error(fmt("Invalid branch: %s", tmp));
278 cgit_print_docend();
279 return 1;
280 }
281 return 0;
282}
283
284static void process_request(void *cbdata)
285{
286 struct cgit_context *ctx = cbdata;
287 struct cgit_cmd *cmd;
288
289 cmd = cgit_get_cmd(ctx);
290 if (!cmd) {
291 ctx->page.title = "cgit error";
292 ctx->repo = NULL;
293 cgit_print_http_headers(ctx);
294 cgit_print_docstart(ctx);
295 cgit_print_pageheader(ctx);
296 cgit_print_error("Invalid request");
297 cgit_print_docend();
298 return;
299 }
300
301 if (cmd->want_repo && !ctx->repo) {
302 cgit_print_http_headers(ctx);
303 cgit_print_docstart(ctx);
304 cgit_print_pageheader(ctx);
305 cgit_print_error(fmt("No repository selected"));
306 cgit_print_docend();
307 return;
308 }
309
310 if (ctx->repo && prepare_repo_cmd(ctx))
311 return;
312
313 if (cmd->want_layout) {
314 cgit_print_http_headers(ctx);
315 cgit_print_docstart(ctx);
316 cgit_print_pageheader(ctx);
317 }
318
319 cmd->fn(ctx);
320
321 if (cmd->want_layout)
322 cgit_print_docend();
323}
324
325int cmp_repos(const void *a, const void *b)
326{
327 const struct cgit_repo *ra = a, *rb = b;
328 return strcmp(ra->url, rb->url);
329}
330
331void print_repo(struct cgit_repo *repo)
332{
333 printf("repo.url=%s\n", repo->url);
334 printf("repo.name=%s\n", repo->name);
335 printf("repo.path=%s\n", repo->path);
336 if (repo->owner)
337 printf("repo.owner=%s\n", repo->owner);
338 if (repo->desc)
339 printf("repo.desc=%s\n", repo->desc);
340 if (repo->readme)
341 printf("repo.readme=%s\n", repo->readme);
342 printf("\n");
343}
344
345void print_repolist(struct cgit_repolist *list)
346{
347 int i;
348
349 for(i = 0; i < list->count; i++)
350 print_repo(&list->repos[i]);
351}
352
353
354static void cgit_parse_args(int argc, const char **argv)
355{
356 int i;
357 int scan = 0;
358
359 for (i = 1; i < argc; i++) {
360 if (!strncmp(argv[i], "--cache=", 8)) {
361 ctx.cfg.cache_root = xstrdup(argv[i]+8);
362 }
363 if (!strcmp(argv[i], "--nocache")) {
364 ctx.cfg.nocache = 1;
365 }
366 if (!strncmp(argv[i], "--query=", 8)) {
367 ctx.qry.raw = xstrdup(argv[i]+8);
368 }
369 if (!strncmp(argv[i], "--repo=", 7)) {
370 ctx.qry.repo = xstrdup(argv[i]+7);
371 }
372 if (!strncmp(argv[i], "--page=", 7)) {
373 ctx.qry.page = xstrdup(argv[i]+7);
374 }
375 if (!strncmp(argv[i], "--head=", 7)) {
376 ctx.qry.head = xstrdup(argv[i]+7);
377 ctx.qry.has_symref = 1;
378 }
379 if (!strncmp(argv[i], "--sha1=", 7)) {
380 ctx.qry.sha1 = xstrdup(argv[i]+7);
381 ctx.qry.has_sha1 = 1;
382 }
383 if (!strncmp(argv[i], "--ofs=", 6)) {
384 ctx.qry.ofs = atoi(argv[i]+6);
385 }
386 if (!strncmp(argv[i], "--scan-tree=", 12)) {
387 scan++;
388 scan_tree(argv[i] + 12);
389 }
390 }
391 if (scan) {
392 qsort(cgit_repolist.repos, cgit_repolist.count,
393 sizeof(struct cgit_repo), cmp_repos);
394 print_repolist(&cgit_repolist);
395 exit(0);
396 }
397}
398
399static int calc_ttl()
400{
401 if (!ctx.repo)
402 return ctx.cfg.cache_root_ttl;
403
404 if (!ctx.qry.page)
405 return ctx.cfg.cache_repo_ttl;
406
407 if (ctx.qry.has_symref)
408 return ctx.cfg.cache_dynamic_ttl;
409
410 if (ctx.qry.has_sha1)
411 return ctx.cfg.cache_static_ttl;
412
413 return ctx.cfg.cache_repo_ttl;
414}
415
416int main(int argc, const char **argv)
417{
418 const char *cgit_config_env = getenv("CGIT_CONFIG");
419 const char *path;
420 char *qry;
421 int err, ttl;
422
423 prepare_context(&ctx);
424 cgit_repolist.length = 0;
425 cgit_repolist.count = 0;
426 cgit_repolist.repos = NULL;
427
428 if (getenv("SCRIPT_NAME"))
429 ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
430 if (getenv("QUERY_STRING"))
431 ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
432 cgit_parse_args(argc, argv);
433 parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
434 config_cb);
435 ctx.repo = NULL;
436 http_parse_querystring(ctx.qry.raw, querystring_cb);
437
438 /* If virtual-root isn't specified in cgitrc and no url
439 * parameter is specified on the querystring, lets pretend
440 * that virtualroot equals SCRIPT_NAME and use PATH_INFO as
441 * url. This allows cgit to work with virtual urls without
442 * the need for rewriterules in the webserver (as long as
443 * PATH_INFO is included in the cache lookup key).
444 */
445 if (!ctx.cfg.virtual_root && !ctx.qry.url) {
446 ctx.cfg.virtual_root = ctx.cfg.script_name;
447 path = getenv("PATH_INFO");
448 if (path) {
449 if (path[0] == '/')
450 path++;
451 ctx.qry.url = xstrdup(path);
452 if (ctx.qry.raw) {
453 qry = ctx.qry.raw;
454 ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
455 free(qry);
456 } else
457 ctx.qry.raw = ctx.qry.url;
458 cgit_parse_url(ctx.qry.url);
459 }
460 }
461
462 ttl = calc_ttl();
463 ctx.page.expires += ttl*60;
464 if (ctx.cfg.nocache)
465 ctx.cfg.cache_size = 0;
466 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
467 ctx.qry.raw, ttl, process_request, &ctx);
468 if (err)
469 cgit_print_error(fmt("Error processing page: %s (%d)",
470 strerror(err), err));
471 return err;
472}