]> git.cameronkatri.com Git - cgit.git/blob - cgit.c
Be prepared for empty repositories
[cgit.git] / 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 #include "cache.h"
11 #include "cmd.h"
12 #include "configfile.h"
13 #include "html.h"
14 #include "ui-shared.h"
15
16 const char *cgit_version = CGIT_VERSION;
17
18 void 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, "repo.group"))
91 ctx.cfg.repo_group = xstrdup(value);
92 else if (!strcmp(name, "repo.url"))
93 ctx.repo = cgit_add_repo(value);
94 else if (!strcmp(name, "repo.name"))
95 ctx.repo->name = xstrdup(value);
96 else if (ctx.repo && !strcmp(name, "repo.path"))
97 ctx.repo->path = trim_end(value, '/');
98 else if (ctx.repo && !strcmp(name, "repo.clone-url"))
99 ctx.repo->clone_url = xstrdup(value);
100 else if (ctx.repo && !strcmp(name, "repo.desc"))
101 ctx.repo->desc = xstrdup(value);
102 else if (ctx.repo && !strcmp(name, "repo.owner"))
103 ctx.repo->owner = xstrdup(value);
104 else if (ctx.repo && !strcmp(name, "repo.defbranch"))
105 ctx.repo->defbranch = xstrdup(value);
106 else if (ctx.repo && !strcmp(name, "repo.snapshots"))
107 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
108 else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
109 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
110 else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
111 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
112 else if (ctx.repo && !strcmp(name, "repo.module-link"))
113 ctx.repo->module_link= xstrdup(value);
114 else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
115 if (*value == '/')
116 ctx.repo->readme = xstrdup(value);
117 else
118 ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
119 } else if (!strcmp(name, "include"))
120 parse_configfile(value, config_cb);
121 }
122
123 static void querystring_cb(const char *name, const char *value)
124 {
125 if (!strcmp(name,"r")) {
126 ctx.qry.repo = xstrdup(value);
127 ctx.repo = cgit_get_repoinfo(value);
128 } else if (!strcmp(name, "p")) {
129 ctx.qry.page = xstrdup(value);
130 } else if (!strcmp(name, "url")) {
131 cgit_parse_url(value);
132 } else if (!strcmp(name, "qt")) {
133 ctx.qry.grep = xstrdup(value);
134 } else if (!strcmp(name, "q")) {
135 ctx.qry.search = xstrdup(value);
136 } else if (!strcmp(name, "h")) {
137 ctx.qry.head = xstrdup(value);
138 ctx.qry.has_symref = 1;
139 } else if (!strcmp(name, "id")) {
140 ctx.qry.sha1 = xstrdup(value);
141 ctx.qry.has_sha1 = 1;
142 } else if (!strcmp(name, "id2")) {
143 ctx.qry.sha2 = xstrdup(value);
144 ctx.qry.has_sha1 = 1;
145 } else if (!strcmp(name, "ofs")) {
146 ctx.qry.ofs = atoi(value);
147 } else if (!strcmp(name, "path")) {
148 ctx.qry.path = trim_end(value, '/');
149 } else if (!strcmp(name, "name")) {
150 ctx.qry.name = xstrdup(value);
151 } else if (!strcmp(name, "mimetype")) {
152 ctx.qry.mimetype = xstrdup(value);
153 }
154 }
155
156 static void prepare_context(struct cgit_context *ctx)
157 {
158 memset(ctx, 0, sizeof(ctx));
159 ctx->cfg.agefile = "info/web/last-modified";
160 ctx->cfg.nocache = 0;
161 ctx->cfg.cache_size = 0;
162 ctx->cfg.cache_dynamic_ttl = 5;
163 ctx->cfg.cache_max_create_time = 5;
164 ctx->cfg.cache_repo_ttl = 5;
165 ctx->cfg.cache_root = CGIT_CACHE_ROOT;
166 ctx->cfg.cache_root_ttl = 5;
167 ctx->cfg.cache_static_ttl = -1;
168 ctx->cfg.css = "/cgit.css";
169 ctx->cfg.logo = "/git-logo.png";
170 ctx->cfg.max_repo_count = 50;
171 ctx->cfg.max_commit_count = 50;
172 ctx->cfg.max_lock_attempts = 5;
173 ctx->cfg.max_msg_len = 60;
174 ctx->cfg.max_repodesc_len = 60;
175 ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
176 ctx->cfg.renamelimit = -1;
177 ctx->cfg.robots = "index, nofollow";
178 ctx->cfg.root_title = "Git repository browser";
179 ctx->cfg.root_desc = "a fast webinterface for the git dscm";
180 ctx->cfg.script_name = CGIT_SCRIPT_NAME;
181 ctx->page.mimetype = "text/html";
182 ctx->page.charset = PAGE_ENCODING;
183 ctx->page.filename = NULL;
184 ctx->page.modified = time(NULL);
185 ctx->page.expires = ctx->page.modified;
186 }
187
188 struct refmatch {
189 char *req_ref;
190 char *first_ref;
191 int match;
192 };
193
194 int find_current_ref(const char *refname, const unsigned char *sha1,
195 int flags, void *cb_data)
196 {
197 struct refmatch *info;
198
199 info = (struct refmatch *)cb_data;
200 if (!strcmp(refname, info->req_ref))
201 info->match = 1;
202 if (!info->first_ref)
203 info->first_ref = xstrdup(refname);
204 return info->match;
205 }
206
207 char *find_default_branch(struct cgit_repo *repo)
208 {
209 struct refmatch info;
210 char *ref;
211
212 info.req_ref = repo->defbranch;
213 info.first_ref = NULL;
214 info.match = 0;
215 for_each_branch_ref(find_current_ref, &info);
216 if (info.match)
217 ref = info.req_ref;
218 else
219 ref = info.first_ref;
220 if (ref)
221 ref = xstrdup(ref);
222 return ref;
223 }
224
225 static int prepare_repo_cmd(struct cgit_context *ctx)
226 {
227 char *tmp;
228 unsigned char sha1[20];
229 int nongit = 0;
230
231 setenv("GIT_DIR", ctx->repo->path, 1);
232 setup_git_directory_gently(&nongit);
233 if (nongit) {
234 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
235 "config error");
236 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
237 ctx->repo = NULL;
238 cgit_print_http_headers(ctx);
239 cgit_print_docstart(ctx);
240 cgit_print_pageheader(ctx);
241 cgit_print_error(tmp);
242 cgit_print_docend();
243 return 1;
244 }
245 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
246
247 if (!ctx->qry.head) {
248 ctx->qry.head = find_default_branch(ctx->repo);
249 ctx->repo->defbranch = ctx->qry.head;
250 }
251
252 if (!ctx->qry.head) {
253 cgit_print_http_headers(ctx);
254 cgit_print_docstart(ctx);
255 cgit_print_pageheader(ctx);
256 cgit_print_error("Repository seems to be empty");
257 cgit_print_docend();
258 return 1;
259 }
260
261 if (get_sha1(ctx->qry.head, sha1)) {
262 tmp = xstrdup(ctx->qry.head);
263 ctx->qry.head = ctx->repo->defbranch;
264 cgit_print_http_headers(ctx);
265 cgit_print_docstart(ctx);
266 cgit_print_pageheader(ctx);
267 cgit_print_error(fmt("Invalid branch: %s", tmp));
268 cgit_print_docend();
269 return 1;
270 }
271 return 0;
272 }
273
274 static void process_request(void *cbdata)
275 {
276 struct cgit_context *ctx = cbdata;
277 struct cgit_cmd *cmd;
278
279 cmd = cgit_get_cmd(ctx);
280 if (!cmd) {
281 ctx->page.title = "cgit error";
282 ctx->repo = NULL;
283 cgit_print_http_headers(ctx);
284 cgit_print_docstart(ctx);
285 cgit_print_pageheader(ctx);
286 cgit_print_error("Invalid request");
287 cgit_print_docend();
288 return;
289 }
290
291 if (cmd->want_repo && !ctx->repo) {
292 cgit_print_http_headers(ctx);
293 cgit_print_docstart(ctx);
294 cgit_print_pageheader(ctx);
295 cgit_print_error(fmt("No repository selected"));
296 cgit_print_docend();
297 return;
298 }
299
300 if (ctx->repo && prepare_repo_cmd(ctx))
301 return;
302
303 if (cmd->want_layout) {
304 cgit_print_http_headers(ctx);
305 cgit_print_docstart(ctx);
306 cgit_print_pageheader(ctx);
307 }
308
309 cmd->fn(ctx);
310
311 if (cmd->want_layout)
312 cgit_print_docend();
313 }
314
315 static void cgit_parse_args(int argc, const char **argv)
316 {
317 int i;
318
319 for (i = 1; i < argc; i++) {
320 if (!strncmp(argv[i], "--cache=", 8)) {
321 ctx.cfg.cache_root = xstrdup(argv[i]+8);
322 }
323 if (!strcmp(argv[i], "--nocache")) {
324 ctx.cfg.nocache = 1;
325 }
326 if (!strncmp(argv[i], "--query=", 8)) {
327 ctx.qry.raw = xstrdup(argv[i]+8);
328 }
329 if (!strncmp(argv[i], "--repo=", 7)) {
330 ctx.qry.repo = xstrdup(argv[i]+7);
331 }
332 if (!strncmp(argv[i], "--page=", 7)) {
333 ctx.qry.page = xstrdup(argv[i]+7);
334 }
335 if (!strncmp(argv[i], "--head=", 7)) {
336 ctx.qry.head = xstrdup(argv[i]+7);
337 ctx.qry.has_symref = 1;
338 }
339 if (!strncmp(argv[i], "--sha1=", 7)) {
340 ctx.qry.sha1 = xstrdup(argv[i]+7);
341 ctx.qry.has_sha1 = 1;
342 }
343 if (!strncmp(argv[i], "--ofs=", 6)) {
344 ctx.qry.ofs = atoi(argv[i]+6);
345 }
346 }
347 }
348
349 static int calc_ttl()
350 {
351 if (!ctx.repo)
352 return ctx.cfg.cache_root_ttl;
353
354 if (!ctx.qry.page)
355 return ctx.cfg.cache_repo_ttl;
356
357 if (ctx.qry.has_symref)
358 return ctx.cfg.cache_dynamic_ttl;
359
360 if (ctx.qry.has_sha1)
361 return ctx.cfg.cache_static_ttl;
362
363 return ctx.cfg.cache_repo_ttl;
364 }
365
366 int main(int argc, const char **argv)
367 {
368 const char *cgit_config_env = getenv("CGIT_CONFIG");
369 int err, ttl;
370
371 prepare_context(&ctx);
372 cgit_repolist.length = 0;
373 cgit_repolist.count = 0;
374 cgit_repolist.repos = NULL;
375
376 parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
377 config_cb);
378 ctx.repo = NULL;
379 if (getenv("SCRIPT_NAME"))
380 ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
381 if (getenv("QUERY_STRING"))
382 ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
383 cgit_parse_args(argc, argv);
384 http_parse_querystring(ctx.qry.raw, querystring_cb);
385
386 ttl = calc_ttl();
387 ctx.page.expires += ttl*60;
388 if (ctx.cfg.nocache)
389 ctx.cfg.cache_size = 0;
390 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
391 ctx.qry.raw, ttl, process_request, &ctx);
392 if (err)
393 cgit_print_error(fmt("Error processing page: %s (%d)",
394 strerror(err), err));
395 return err;
396 }