1/* shared.c: global vars + some callback functions
  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
 11struct repolist cgit_repolist;
 12struct repoinfo *cgit_repo;
 13
 14char *cgit_root_title   = "Git repository browser";
 15char *cgit_css          = "/cgit.css";
 16char *cgit_logo         = "/git-logo.png";
 17char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
 18char *cgit_module_link  = "./?repo=%s&page=commit&id=%s";
 19char *cgit_virtual_root = NULL;
 20
 21char *cgit_cache_root   = "/var/cache/cgit";
 22
 23int cgit_nocache               =  0;
 24int cgit_snapshots             =  0;
 25int cgit_max_lock_attempts     =  5;
 26int cgit_cache_root_ttl        =  5;
 27int cgit_cache_repo_ttl        =  5;
 28int cgit_cache_dynamic_ttl     =  5;
 29int cgit_cache_static_ttl      = -1;
 30int cgit_cache_max_create_time =  5;
 31
 32int cgit_max_msg_len = 60;
 33int cgit_max_commit_count = 50;
 34
 35char *cgit_repo_name    = NULL;
 36char *cgit_repo_desc    = NULL;
 37char *cgit_repo_owner   = NULL;
 38
 39int cgit_query_has_symref = 0;
 40int cgit_query_has_sha1   = 0;
 41
 42char *cgit_querystring  = NULL;
 43char *cgit_query_repo   = NULL;
 44char *cgit_query_page   = NULL;
 45char *cgit_query_head   = NULL;
 46char *cgit_query_search = NULL;
 47char *cgit_query_sha1   = NULL;
 48char *cgit_query_sha2   = NULL;
 49char *cgit_query_path   = NULL;
 50char *cgit_query_name   = NULL;
 51int   cgit_query_ofs    = 0;
 52
 53int htmlfd = 0;
 54
 55int chk_zero(int result, char *msg)
 56{
 57	if (result != 0)
 58		die("%s: %s", msg, strerror(errno));
 59	return result;
 60}
 61
 62int chk_positive(int result, char *msg)
 63{
 64	if (result <= 0)
 65		die("%s: %s", msg, strerror(errno));
 66	return result;
 67}
 68
 69struct repoinfo *add_repo(const char *url)
 70{
 71	struct repoinfo *ret;
 72
 73	if (++cgit_repolist.count > cgit_repolist.length) {
 74		if (cgit_repolist.length == 0)
 75			cgit_repolist.length = 8;
 76		else
 77			cgit_repolist.length *= 2;
 78		cgit_repolist.repos = xrealloc(cgit_repolist.repos,
 79					       cgit_repolist.length *
 80					       sizeof(struct repoinfo));
 81	}
 82
 83	ret = &cgit_repolist.repos[cgit_repolist.count-1];
 84	ret->url = xstrdup(url);
 85	ret->name = ret->url;
 86	ret->path = NULL;
 87	ret->desc = NULL;
 88	ret->owner = NULL;
 89	ret->snapshots = cgit_snapshots;
 90	ret->module_link = cgit_module_link;
 91	return ret;
 92}
 93
 94void cgit_global_config_cb(const char *name, const char *value)
 95{
 96	if (!strcmp(name, "root-title"))
 97		cgit_root_title = xstrdup(value);
 98	else if (!strcmp(name, "css"))
 99		cgit_css = xstrdup(value);
100	else if (!strcmp(name, "logo"))
101		cgit_logo = xstrdup(value);
102	else if (!strcmp(name, "logo-link"))
103		cgit_logo_link = xstrdup(value);
104	else if (!strcmp(name, "module-link"))
105		cgit_module_link = xstrdup(value);
106	else if (!strcmp(name, "virtual-root"))
107		cgit_virtual_root = xstrdup(value);
108	else if (!strcmp(name, "nocache"))
109		cgit_nocache = atoi(value);
110	else if (!strcmp(name, "snapshots"))
111		cgit_snapshots = atoi(value);
112	else if (!strcmp(name, "cache-root"))
113		cgit_cache_root = xstrdup(value);
114	else if (!strcmp(name, "cache-root-ttl"))
115		cgit_cache_root_ttl = atoi(value);
116	else if (!strcmp(name, "cache-repo-ttl"))
117		cgit_cache_repo_ttl = atoi(value);
118	else if (!strcmp(name, "cache-static-ttl"))
119		cgit_cache_static_ttl = atoi(value);
120	else if (!strcmp(name, "cache-dynamic-ttl"))
121		cgit_cache_dynamic_ttl = atoi(value);
122	else if (!strcmp(name, "max-message-length"))
123		cgit_max_msg_len = atoi(value);
124	else if (!strcmp(name, "max-commit-count"))
125		cgit_max_commit_count = atoi(value);
126	else if (!strcmp(name, "repo.url"))
127		cgit_repo = add_repo(value);
128	else if (!strcmp(name, "repo.name"))
129		cgit_repo->name = xstrdup(value);
130	else if (cgit_repo && !strcmp(name, "repo.path"))
131		cgit_repo->path = xstrdup(value);
132	else if (cgit_repo && !strcmp(name, "repo.desc"))
133		cgit_repo->desc = xstrdup(value);
134	else if (cgit_repo && !strcmp(name, "repo.owner"))
135		cgit_repo->owner = xstrdup(value);
136	else if (cgit_repo && !strcmp(name, "repo.snapshots"))
137		cgit_repo->snapshots = atoi(value);
138	else if (cgit_repo && !strcmp(name, "repo.module-link"))
139		cgit_repo->module_link= xstrdup(value);
140}
141
142void cgit_repo_config_cb(const char *name, const char *value)
143{
144	if (!strcmp(name, "name"))
145		cgit_repo_name = xstrdup(value);
146	else if (!strcmp(name, "desc"))
147		cgit_repo_desc = xstrdup(value);
148	else if (!strcmp(name, "owner"))
149		cgit_repo_owner = xstrdup(value);
150}
151
152void cgit_querystring_cb(const char *name, const char *value)
153{
154	if (!strcmp(name,"r")) {
155		cgit_query_repo = xstrdup(value);
156	} else if (!strcmp(name, "p")) {
157		cgit_query_page = xstrdup(value);
158	} else if (!strcmp(name, "q")) {
159		cgit_query_search = xstrdup(value);
160	} else if (!strcmp(name, "h")) {
161		cgit_query_head = xstrdup(value);
162		cgit_query_has_symref = 1;
163	} else if (!strcmp(name, "id")) {
164		cgit_query_sha1 = xstrdup(value);
165		cgit_query_has_sha1 = 1;
166	} else if (!strcmp(name, "id2")) {
167		cgit_query_sha2 = xstrdup(value);
168		cgit_query_has_sha1 = 1;
169	} else if (!strcmp(name, "ofs")) {
170		cgit_query_ofs = atoi(value);
171	} else if (!strcmp(name, "path")) {
172		cgit_query_path = xstrdup(value);
173	} else if (!strcmp(name, "name")) {
174		cgit_query_name = xstrdup(value);
175	}
176}
177
178void *cgit_free_commitinfo(struct commitinfo *info)
179{
180	free(info->author);
181	free(info->author_email);
182	free(info->committer);
183	free(info->committer_email);
184	free(info->subject);
185	free(info);
186	return NULL;
187}
188
189int hextoint(char c)
190{
191	if (c >= 'a' && c <= 'f')
192		return 10 + c - 'a';
193	else if (c >= 'A' && c <= 'F')
194		return 10 + c - 'A';
195	else if (c >= '0' && c <= '9')
196		return c - '0';
197	else
198		return -1;
199}
200
201void cgit_diff_tree_cb(struct diff_queue_struct *q,
202		       struct diff_options *options, void *data)
203{
204	int i;
205
206	for (i = 0; i < q->nr; i++) {
207		if (q->queue[i]->status == 'U')
208			continue;
209		((filepair_fn)data)(q->queue[i]);
210	}
211}
212
213static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
214{
215	enum object_type type;
216
217	if (is_null_sha1(sha1)) {
218		file->ptr = (char *)"";
219		file->size = 0;
220	} else {
221		file->ptr = read_sha1_file(sha1, &type, &file->size);
222	}
223	return 1;
224}
225
226/*
227 * Receive diff-buffers from xdiff and concatenate them as
228 * needed across multiple callbacks.
229 *
230 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
231 * ripped from git and modified to use globals instead of
232 * a special callback-struct.
233 */
234char *diffbuf = NULL;
235int buflen = 0;
236
237int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
238{
239	int i;
240
241	for (i = 0; i < nbuf; i++) {
242		if (mb[i].ptr[mb[i].size-1] != '\n') {
243			/* Incomplete line */
244			diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
245			memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
246			buflen += mb[i].size;
247			continue;
248		}
249
250		/* we have a complete line */
251		if (!diffbuf) {
252			((linediff_fn)priv)(mb[i].ptr, mb[i].size);
253			continue;
254		}
255		diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
256		memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
257		((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
258		free(diffbuf);
259		diffbuf = NULL;
260		buflen = 0;
261	}
262	if (diffbuf) {
263		((linediff_fn)priv)(diffbuf, buflen);
264		free(diffbuf);
265		diffbuf = NULL;
266		buflen = 0;
267	}
268	return 0;
269}
270
271int cgit_diff_files(const unsigned char *old_sha1,
272		     const unsigned char *new_sha1,
273		     linediff_fn fn)
274{
275	mmfile_t file1, file2;
276	xpparam_t diff_params;
277	xdemitconf_t emit_params;
278	xdemitcb_t emit_cb;
279
280	if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
281		return 1;
282
283	diff_params.flags = XDF_NEED_MINIMAL;
284	emit_params.ctxlen = 3;
285	emit_params.flags = XDL_EMIT_FUNCNAMES;
286	emit_cb.outf = filediff_cb;
287	emit_cb.priv = fn;
288	xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
289	return 0;
290}
291
292void cgit_diff_tree(const unsigned char *old_sha1,
293		    const unsigned char *new_sha1,
294		    filepair_fn fn)
295{
296	struct diff_options opt;
297	int ret;
298
299	diff_setup(&opt);
300	opt.output_format = DIFF_FORMAT_CALLBACK;
301	opt.detect_rename = 1;
302	opt.recursive = 1;
303	opt.format_callback = cgit_diff_tree_cb;
304	opt.format_callback_data = fn;
305	diff_setup_done(&opt);
306
307	if (old_sha1)
308		ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
309	else
310		ret = diff_root_tree_sha1(new_sha1, "", &opt);
311	diffcore_std(&opt);
312	diff_flush(&opt);
313}
314
315void cgit_diff_commit(struct commit *commit, filepair_fn fn)
316{
317	unsigned char *old_sha1 = NULL;
318
319	if (commit->parents)
320		old_sha1 = commit->parents->item->object.sha1;
321	cgit_diff_tree(old_sha1, commit->object.sha1, fn);
322}