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