aboutsummaryrefslogtreecommitdiffstats
path: root/cgit.c
blob: 5dcba768f0baefe15196053799c0d53b498b126e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/* cgit.c: cgi for the git scm
 *
 * Copyright (C) 2006 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"

const char cgit_version[] = CGIT_VERSION;

static void cgit_print_repo_page(struct cacheitem *item)
{
	if (chdir(fmt("%s/%s", cgit_root, cgit_query_repo)) || 
	    cgit_read_config("info/cgit", cgit_repo_config_cb)) {
		char *title = fmt("%s - %s", cgit_root_title, "Bad request");
		cgit_print_docstart(title, item);
		cgit_print_pageheader(title, 0);
		cgit_print_error(fmt("Unable to scan repository: %s",
				     strerror(errno)));
		cgit_print_docend();
		return;
	}
	setenv("GIT_DIR", fmt("%s/%s", cgit_root, cgit_query_repo), 1);
	char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
	int show_search = 0;
	if (cgit_query_page && !strcmp(cgit_query_page, "log"))
		show_search = 1;
	cgit_print_docstart(title, item);
	cgit_print_pageheader(title, show_search);
	if (!cgit_query_page) {
		cgit_print_summary();
	} else if (!strcmp(cgit_query_page, "log")) {
		cgit_print_log(cgit_query_head, cgit_query_ofs, 100, cgit_query_search);
	} else if (!strcmp(cgit_query_page, "tree")) {
		cgit_print_tree(cgit_query_sha1);
	} else if (!strcmp(cgit_query_page, "commit")) {
		cgit_print_commit(cgit_query_sha1);
	} else if (!strcmp(cgit_query_page, "view")) {
		cgit_print_view(cgit_query_sha1);
	} else if (!strcmp(cgit_query_page, "diff")) {
		cgit_print_diff(cgit_query_sha1, cgit_query_sha2);
	}
	cgit_print_docend();
}

static void cgit_fill_cache(struct cacheitem *item)
{
	static char buf[PATH_MAX];

	getcwd(buf, sizeof(buf));
	htmlfd = item->fd;
	item->st.st_mtime = time(NULL);
	if (cgit_query_repo)
		cgit_print_repo_page(item);
	else
		cgit_print_repolist(item);
	chdir(buf);
}

static void cgit_check_cache(struct cacheitem *item)
{
	int i = 0;

	cache_prepare(item);
 top:
	if (++i > cgit_max_lock_attempts) {
		die("cgit_refresh_cache: unable to lock %s: %s",
		    item->name, strerror(errno));
	}
	if (!cache_exist(item)) {
		if (!cache_lock(item)) {
			sleep(1);
			goto top;
		}
		if (!cache_exist(item)) {
			cgit_fill_cache(item);
			cache_unlock(item);
		} else {
			cache_cancel_lock(item);
		}
	} else if (cache_expired(item) && cache_lock(item)) {
		if (cache_expired(item)) {
			cgit_fill_cache(item);
			cache_unlock(item);
		} else {
			cache_cancel_lock(item);
		}
	}
}

static void cgit_print_cache(struct cacheitem *item)
{
	static char buf[4096];
	ssize_t i;

	int fd = open(item->name, O_RDONLY);
	if (fd<0)
		die("Unable to open cached file %s", item->name);

	while((i=read(fd, buf, sizeof(buf))) > 0)
		write(STDOUT_FILENO, buf, i);

	close(fd);
}

static void cgit_parse_args(int argc, const char **argv)
{
	int i;

	for (i = 1; i < argc; i++) {
		if (!strncmp(argv[i], "--root=", 7)) {
			cgit_root = xstrdup(argv[i]+7);
		}
		if (!strncmp(argv[i], "--cache=", 8)) {
			cgit_cache_root = xstrdup(argv[i]+8);
		}
		if (!strcmp(argv[i], "--nocache")) {
			cgit_nocache = 1;
		}
		if (!strncmp(argv[i], "--query=", 8)) {
			cgit_querystring = xstrdup(argv[i]+8);
		}
		if (!strncmp(argv[i], "--repo=", 7)) {
			cgit_query_repo = xstrdup(argv[i]+7);
		}
		if (!strncmp(argv[i], "--page=", 7)) {
			cgit_query_page = xstrdup(argv[i]+7);
		}
		if (!strncmp(argv[i], "--head=", 7)) {
			cgit_query_head = xstrdup(argv[i]+7);
			cgit_query_has_symref = 1;
		}
		if (!strncmp(argv[i], "--sha1=", 7)) {
			cgit_query_sha1 = xstrdup(argv[i]+7);
			cgit_query_has_sha1 = 1;
		}
		if (!strncmp(argv[i], "--ofs=", 6)) {
			cgit_query_ofs = atoi(argv[i]+6);
		}
	}
}

int main(int argc, const char **argv)
{
	struct cacheitem item;

	cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
	if (getenv("QUERY_STRING"))
		cgit_querystring = xstrdup(getenv("QUERY_STRING"));
	cgit_parse_args(argc, argv);
	cgit_parse_query(cgit_querystring, cgit_querystring_cb);

	if (cgit_nocache) {
		cache_prepare(&item);
		item.fd = STDOUT_FILENO;
		cgit_fill_cache(&item);
	} else {
		cgit_check_cache(&item);
		cgit_print_cache(&item);
	}
	return 0;
}