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/* 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;
int htmlfd = 0;
char *cgit_root = "/usr/src/git";
char *cgit_root_title = "Git repository browser";
char *cgit_css = "/cgit.css";
char *cgit_logo = "/git-logo.png";
char *cgit_logo_link = "http://www.kernel.org/pub/software/scm/git/docs/";
char *cgit_virtual_root = NULL;
char *cgit_cache_root = "/var/cache/cgit";
int cgit_max_lock_attempts = 5;
int cgit_cache_root_ttl = 5;
int cgit_cache_repo_ttl = 5;
int cgit_cache_dynamic_ttl = 5;
int cgit_cache_static_ttl = -1;
int cgit_cache_max_create_time = 5;
char *cgit_repo_name = NULL;
char *cgit_repo_desc = NULL;
char *cgit_repo_owner = NULL;
int cgit_query_has_symref = 0;
int cgit_query_has_sha1 = 0;
char *cgit_querystring = NULL;
char *cgit_query_repo = NULL;
char *cgit_query_page = NULL;
char *cgit_query_head = NULL;
char *cgit_query_sha1 = NULL;
struct cacheitem cacheitem;
void cgit_global_config_cb(const char *name, const char *value)
{
if (!strcmp(name, "root"))
cgit_root = xstrdup(value);
else if (!strcmp(name, "root-title"))
cgit_root_title = xstrdup(value);
else if (!strcmp(name, "css"))
cgit_css = xstrdup(value);
else if (!strcmp(name, "logo"))
cgit_logo = xstrdup(value);
else if (!strcmp(name, "logo-link"))
cgit_logo_link = xstrdup(value);
else if (!strcmp(name, "virtual-root"))
cgit_virtual_root = xstrdup(value);
}
void cgit_repo_config_cb(const char *name, const char *value)
{
if (!strcmp(name, "name"))
cgit_repo_name = xstrdup(value);
else if (!strcmp(name, "desc"))
cgit_repo_desc = xstrdup(value);
else if (!strcmp(name, "owner"))
cgit_repo_owner = xstrdup(value);
}
void cgit_querystring_cb(const char *name, const char *value)
{
if (!strcmp(name,"r"))
cgit_query_repo = xstrdup(value);
else if (!strcmp(name, "p"))
cgit_query_page = xstrdup(value);
else if (!strcmp(name, "h")) {
cgit_query_head = xstrdup(value);
cgit_query_has_symref = 1;
} else if (!strcmp(name, "id")) {
cgit_query_sha1 = xstrdup(value);
cgit_query_has_sha1 = 1;
}
}
static void cgit_print_object(char *hex)
{
unsigned char sha1[20];
//struct object *object;
char type[20];
unsigned char *buf;
unsigned long size;
if (get_sha1_hex(hex, sha1)){
cgit_print_error(fmt("Bad hex value: %s", hex));
return;
}
if (sha1_object_info(sha1, type, NULL)){
cgit_print_error("Bad object name");
return;
}
buf = read_sha1_file(sha1, type, &size);
if (!buf) {
cgit_print_error("Error reading object");
return;
}
buf[size] = '\0';
html("<h2>Object view</h2>");
htmlf("sha1=%s<br/>type=%s<br/>size=%i<br/>", hex, type, size);
html("<pre>");
html_txt(buf);
html("</pre>");
}
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);
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);
cgit_print_docstart(title, item);
cgit_print_pageheader(title);
if (!cgit_query_page)
cgit_print_summary();
else if (!strcmp(cgit_query_page, "log")) {
cgit_print_log(cgit_query_head, 0, 100);
} else if (!strcmp(cgit_query_page, "view")) {
cgit_print_object(cgit_query_sha1);
}
cgit_print_docend();
}
static void cgit_fill_cache(struct cacheitem *item)
{
htmlfd = item->fd;
item->st.st_mtime = time(NULL);
if (cgit_query_repo)
cgit_print_repo_page(item);
else
cgit_print_repolist(item);
}
static void cgit_refresh_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 if (cache_expired(item) && cache_lock(item)) {
if (cache_expired(item))
cgit_fill_cache(item);
cache_unlock(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);
}
int main(int argc, const char **argv)
{
cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
cgit_querystring = xstrdup(getenv("QUERY_STRING"));
cgit_parse_query(cgit_querystring, cgit_querystring_cb);
cgit_refresh_cache(&cacheitem);
cgit_print_cache(&cacheitem);
return 0;
}
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