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_index_header = NULL;
 18char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
 19char *cgit_module_link  = "./?repo=%s&page=commit&id=%s";
 20char *cgit_virtual_root = NULL;
 21char *cgit_script_name  = CGIT_SCRIPT_NAME;
 22char *cgit_cache_root   = "/var/cache/cgit";
 23
 24int cgit_nocache               =  0;
 25int cgit_snapshots             =  0;
 26int cgit_enable_log_filecount  =  0;
 27int cgit_enable_log_linecount  =  0;
 28int cgit_max_lock_attempts     =  5;
 29int cgit_cache_root_ttl        =  5;
 30int cgit_cache_repo_ttl        =  5;
 31int cgit_cache_dynamic_ttl     =  5;
 32int cgit_cache_static_ttl      = -1;
 33int cgit_cache_max_create_time =  5;
 34
 35int cgit_max_msg_len = 60;
 36int cgit_max_repodesc_len = 60;
 37int cgit_max_commit_count = 50;
 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->defbranch = "master";
 90	ret->snapshots = cgit_snapshots;
 91	ret->enable_log_filecount = cgit_enable_log_filecount;
 92	ret->enable_log_linecount = cgit_enable_log_linecount;
 93	ret->module_link = cgit_module_link;
 94	return ret;
 95}
 96
 97void cgit_global_config_cb(const char *name, const char *value)
 98{
 99	if (!strcmp(name, "root-title"))
100		cgit_root_title = xstrdup(value);
101	else if (!strcmp(name, "css"))
102		cgit_css = xstrdup(value);
103	else if (!strcmp(name, "logo"))
104		cgit_logo = xstrdup(value);
105	else if (!strcmp(name, "index-header"))
106		cgit_index_header = xstrdup(value);
107	else if (!strcmp(name, "logo-link"))
108		cgit_logo_link = xstrdup(value);
109	else if (!strcmp(name, "module-link"))
110		cgit_module_link = xstrdup(value);
111	else if (!strcmp(name, "virtual-root"))
112		cgit_virtual_root = xstrdup(value);
113	else if (!strcmp(name, "nocache"))
114		cgit_nocache = atoi(value);
115	else if (!strcmp(name, "snapshots"))
116		cgit_snapshots = atoi(value);
117	else if (!strcmp(name, "enable-log-filecount"))
118		cgit_enable_log_filecount = atoi(value);
119	else if (!strcmp(name, "enable-log-linecount"))
120		cgit_enable_log_linecount = atoi(value);
121	else if (!strcmp(name, "cache-root"))
122		cgit_cache_root = xstrdup(value);
123	else if (!strcmp(name, "cache-root-ttl"))
124		cgit_cache_root_ttl = atoi(value);
125	else if (!strcmp(name, "cache-repo-ttl"))
126		cgit_cache_repo_ttl = atoi(value);
127	else if (!strcmp(name, "cache-static-ttl"))
128		cgit_cache_static_ttl = atoi(value);
129	else if (!strcmp(name, "cache-dynamic-ttl"))
130		cgit_cache_dynamic_ttl = atoi(value);
131	else if (!strcmp(name, "max-message-length"))
132		cgit_max_msg_len = atoi(value);
133	else if (!strcmp(name, "max-repodesc-length"))
134		cgit_max_repodesc_len = atoi(value);
135	else if (!strcmp(name, "max-commit-count"))
136		cgit_max_commit_count = atoi(value);
137	else if (!strcmp(name, "repo.url"))
138		cgit_repo = add_repo(value);
139	else if (!strcmp(name, "repo.name"))
140		cgit_repo->name = xstrdup(value);
141	else if (cgit_repo && !strcmp(name, "repo.path"))
142		cgit_repo->path = xstrdup(value);
143	else if (cgit_repo && !strcmp(name, "repo.desc"))
144		cgit_repo->desc = xstrdup(value);
145	else if (cgit_repo && !strcmp(name, "repo.owner"))
146		cgit_repo->owner = xstrdup(value);
147	else if (cgit_repo && !strcmp(name, "repo.defbranch"))
148		cgit_repo->defbranch = xstrdup(value);
149	else if (cgit_repo && !strcmp(name, "repo.snapshots"))
150		cgit_repo->snapshots = cgit_snapshots * atoi(value);
151	else if (cgit_repo && !strcmp(name, "repo.enable-log-filecount"))
152		cgit_repo->enable_log_filecount = cgit_enable_log_filecount * atoi(value);
153	else if (cgit_repo && !strcmp(name, "repo.enable-log-linecount"))
154		cgit_repo->enable_log_linecount = cgit_enable_log_linecount * atoi(value);
155	else if (cgit_repo && !strcmp(name, "repo.module-link"))
156		cgit_repo->module_link= xstrdup(value);
157	else if (!strcmp(name, "include"))
158		cgit_read_config(value, cgit_global_config_cb);
159}
160
161void cgit_querystring_cb(const char *name, const char *value)
162{
163	if (!strcmp(name,"r")) {
164		cgit_query_repo = xstrdup(value);
165	} else if (!strcmp(name, "p")) {
166		cgit_query_page = xstrdup(value);
167	} else if (!strcmp(name, "q")) {
168		cgit_query_search = xstrdup(value);
169	} else if (!strcmp(name, "h")) {
170		cgit_query_head = xstrdup(value);
171		cgit_query_has_symref = 1;
172	} else if (!strcmp(name, "id")) {
173		cgit_query_sha1 = xstrdup(value);
174		cgit_query_has_sha1 = 1;
175	} else if (!strcmp(name, "id2")) {
176		cgit_query_sha2 = xstrdup(value);
177		cgit_query_has_sha1 = 1;
178	} else if (!strcmp(name, "ofs")) {
179		cgit_query_ofs = atoi(value);
180	} else if (!strcmp(name, "path")) {
181		cgit_query_path = xstrdup(value);
182	} else if (!strcmp(name, "name")) {
183		cgit_query_name = xstrdup(value);
184	}
185}
186
187void *cgit_free_commitinfo(struct commitinfo *info)
188{
189	free(info->author);
190	free(info->author_email);
191	free(info->committer);
192	free(info->committer_email);
193	free(info->subject);
194	free(info);
195	return NULL;
196}
197
198int hextoint(char c)
199{
200	if (c >= 'a' && c <= 'f')
201		return 10 + c - 'a';
202	else if (c >= 'A' && c <= 'F')
203		return 10 + c - 'A';
204	else if (c >= '0' && c <= '9')
205		return c - '0';
206	else
207		return -1;
208}
209
210void cgit_diff_tree_cb(struct diff_queue_struct *q,
211		       struct diff_options *options, void *data)
212{
213	int i;
214
215	for (i = 0; i < q->nr; i++) {
216		if (q->queue[i]->status == 'U')
217			continue;
218		((filepair_fn)data)(q->queue[i]);
219	}
220}
221
222static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
223{
224	enum object_type type;
225
226	if (is_null_sha1(sha1)) {
227		file->ptr = (char *)"";
228		file->size = 0;
229	} else {
230		file->ptr = read_sha1_file(sha1, &type, &file->size);
231	}
232	return 1;
233}
234
235/*
236 * Receive diff-buffers from xdiff and concatenate them as
237 * needed across multiple callbacks.
238 *
239 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
240 * ripped from git and modified to use globals instead of
241 * a special callback-struct.
242 */
243char *diffbuf = NULL;
244int buflen = 0;
245
246int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
247{
248	int i;
249
250	for (i = 0; i < nbuf; i++) {
251		if (mb[i].ptr[mb[i].size-1] != '\n') {
252			/* Incomplete line */
253			diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
254			memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
255			buflen += mb[i].size;
256			continue;
257		}
258
259		/* we have a complete line */
260		if (!diffbuf) {
261			((linediff_fn)priv)(mb[i].ptr, mb[i].size);
262			continue;
263		}
264		diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
265		memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
266		((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
267		free(diffbuf);
268		diffbuf = NULL;
269		buflen = 0;
270	}
271	if (diffbuf) {
272		((linediff_fn)priv)(diffbuf, buflen);
273		free(diffbuf);
274		diffbuf = NULL;
275		buflen = 0;
276	}
277	return 0;
278}
279
280int cgit_diff_files(const unsigned char *old_sha1,
281		     const unsigned char *new_sha1,
282		     linediff_fn fn)
283{
284	mmfile_t file1, file2;
285	xpparam_t diff_params;
286	xdemitconf_t emit_params;
287	xdemitcb_t emit_cb;
288
289	if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
290		return 1;
291
292	diff_params.flags = XDF_NEED_MINIMAL;
293	emit_params.ctxlen = 3;
294	emit_params.flags = XDL_EMIT_FUNCNAMES;
295	emit_cb.outf = filediff_cb;
296	emit_cb.priv = fn;
297	xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
298	return 0;
299}
300
301void cgit_diff_tree(const unsigned char *old_sha1,
302		    const unsigned char *new_sha1,
303		    filepair_fn fn)
304{
305	struct diff_options opt;
306	int ret;
307
308	diff_setup(&opt);
309	opt.output_format = DIFF_FORMAT_CALLBACK;
310	opt.detect_rename = 1;
311	opt.recursive = 1;
312	opt.format_callback = cgit_diff_tree_cb;
313	opt.format_callback_data = fn;
314	diff_setup_done(&opt);
315
316	if (old_sha1)
317		ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
318	else
319		ret = diff_root_tree_sha1(new_sha1, "", &opt);
320	diffcore_std(&opt);
321	diff_flush(&opt);
322}
323
324void cgit_diff_commit(struct commit *commit, filepair_fn fn)
325{
326	unsigned char *old_sha1 = NULL;
327
328	if (commit->parents)
329		old_sha1 = commit->parents->item->object.sha1;
330	cgit_diff_tree(old_sha1, commit->object.sha1, fn);
331}