/* 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;
const char cgit_doctype[] =
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
const char cgit_error[] =
"<div class='error'>%s</div>";
const char cgit_lib_error[] =
"<div class='error'>%s: %s</div>";
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_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;
int cgit_parse_query(char *txt, configfn fn)
{
char *t, *value = NULL, c;
if (!txt)
return 0;
t = txt = xstrdup(txt);
while((c=*t) != '\0') {
if (c=='=') {
*t = '\0';
value = t+1;
} else if (c=='&') {
*t = '\0';
(*fn)(txt, value);
txt = t+1;
value = NULL;
}
t++;
}
if (t!=txt)
(*fn)(txt, value);
return 0;
}
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;
}
}
char *cgit_repourl(const char *reponame)
{
if (cgit_virtual_root) {
return fmt("%s/%s/", cgit_virtual_root, reponame);
} else {
return fmt("?r=%s", reponame);
}
}
char *cgit_pageurl(const char *reponame, const char *pagename,
const char *query)
{
if (cgit_virtual_root) {
return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame,
pagename, query);
} else {
return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
}
}
static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
int flags, void *cb_data)
{
struct commit *commit;
char buf[256], *url;
commit = lookup_commit(sha1);
if (commit && !parse_commit(commit)){
html("<tr><td>");
url = cgit_pageurl(cgit_query_repo, "log",
fmt("h=%s", refname));
html_link_open(url, NULL, NULL);
strncpy(buf, refname, sizeof(buf));
html_txt(buf);
html_link_close();
html("</td><td>");
pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, buf,
sizeof(buf), 0, NULL, NULL, 0);
html_txt(buf);
html("</td></tr>\n");
} else {
html("<tr><td>");
html_txt(buf);
html("</td><td>");
htmlf("*** bad ref %s", sha1_to_hex(sha1));
html("</td></tr>\n");
}
return 0;
}
/* Sun, 06 Nov 1994 08:49:37 GMT */
static char *http_date(time_t t)
{
static char day[][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
static char month[][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Now", "Dec"};
struct tm *tm = gmtime(&t);
return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
tm->tm_mday, month[tm->tm_mon], 1900+tm->tm_year,
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
static int ttl_seconds(int ttl)
{
if (ttl<0)
return 60 * 60 * 24 * 365;
else
return ttl * 60;
}
static void cgit_print_docstart(char *title)
{
html("Content-Type: text/html; charset=utf-8\n");
htmlf("Last-Modified: %s\n", http_date(cacheitem.st.st_mtime));
htmlf("Expires: %s\n", http_date(cacheitem.st.st_mtime +
ttl_seconds(cacheitem.ttl)));
html("\n");
html(cgit_doctype);
html("<html>\n");
html("<head>\n");
html("<title>");
html_txt(title);
html("</title>\n");
htmlf("<meta name='generator' content='cgit v%s'/>\n", cgit_version);
html("<link rel='stylesheet' type='text/css' href='");
html_attr(cgit_css);
html("'/>\n");
html("</head>\n");
html("<body>\n");
}
static void cgit_print_docend()
{
html("</body>\n</html>\n");
}
static void cgit_print_pageheader(char *title)
{
html("<div id='header'>");
htmlf("<a href='%s'>", cgit_logo_link);
htmlf("<img id='logo' src='%s'/>\n", cgit_logo);
htmlf("</a>");
html_txt(title);
html("</div>");
}
static void cgit_print_repolist()
{
DIR *d;
struct dirent *de;
struct stat st;
char *name;
chdir(cgit_root);
cgit_print_docstart(cgit_root_title);
cgit_print_pageheader(cgit_root_title);
if (!(d = opendir("."))) {
htmlf(cgit_lib_error, "Unable to scan repository directory",
strerror(errno));
cgit_print_docend();
return;
}
html("<h2>Repositories</h2>\n");
html("<table class='list'>");
html("<tr><th>Name</th><th>Description</th><th>Owner</th></tr>\n");
while ((de = readdir(d)) != NULL) {
if (de->d_name[0] == '.')
continue;
if (stat(de->d_name, &st) < 0)
continue;
if (!S_ISDIR(st.st_mode))
continue;
cgit_repo_name = cgit_repo_desc = cgit_repo_owner = NULL;
name = fmt("%s/info/cgit", de->d_name);
if (cgit_read_config(name, cgit_repo_config_cb))
continue;
html("<tr><td>");
html_link_open(cgit_repourl(de->d_name), NULL, NULL);
html_txt(cgit_repo_name);
html_link_close();
html("</td><td>");
html_txt(cgit_repo_desc);
html("</td><td>");
html_txt(cgit_repo_owner);
html("</td></tr>\n");
}
closedir(d);
html("</table>");
cgit_print_docend();
}
static void cgit_print_branches()
{
html("<table class='list'>");
html("<tr><th>Branch name</th><th>Head commit</th></tr>\n");
for_each_branch_ref(cgit_print_branch_cb, NULL);
html("</table>");
}
static int get_one_line(char *txt)
{
char *t;
for(t=txt; *t != '\n' && t != '\0'; t++)
;
*t = '\0';
return t-txt-1;
}
static void cgit_print_commit_shortlog(struct commit *commit)
{
char *h, *t, *p;
char *tree = NULL, *author = NULL, *subject = NULL;
int len;
time_t sec;
struct tm *time;
char buf[32];
h = t = commit->buffer;
if (strncmp(h, "tree ", 5))
die("Bad commit format: %s",
sha1_to_hex(commit->object.sha1));
len = get_one_line(h);
tree = h+5;
h += len + 2;
while (!strncmp(h, "parent ", 7))
h += get_one_line(h) + 2;
if (!strncmp(h, "author ", 7)) {
author = h+7;
h += get_one_line(h) + 2;
t = author;
while(t!=h && *t!='<')
t++;
*t='\0';
p = t;
while(--t!=author && *t==' ')
*t='\0';
while(++p!=h && *p!='>')
;
while(++p!=h && !isdigit(*p))
;
t = p;
while(++p && isdigit(*p))
;
*p = '\0';
sec = atoi(t);
time = gmtime(&sec);
}
while((len = get_one_line(h)) > 0)
h += len+2;
h++;
len = get_one_line(h);
subject = h;
html("<tr><td>");
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
html_txt(buf);
html("</td><td>");
char *qry = fmt("id=%s", sha1_to_hex(commit->object.sha1));
char *url = cgit_pageurl(cgit_query_repo, "view", qry);
html_link_open(url, NULL, NULL);
html_txt(subject);
html_link_close();
html("</td><td>");
html_txt(author);
html("</td></tr>\n");
}
static void cgit_print_log(const char *tip, int ofs, int cnt)
{
struct rev_info rev;
struct commit *commit;
const char *argv[2] = {NULL, tip};
int n = 0;
init_revisions(&rev, NULL);
rev.abbrev = DEFAULT_ABBREV;
rev.commit_format = CMIT_FMT_DEFAULT;
rev.verbose_header = 1;
rev.show_root_diff = 0;
setup_revisions(2, argv, &rev, NULL);
prepare_revision_walk(&rev);
html("<h2>Log</h2>");
html("<table class='list'>");
html("<tr><th>Date</th><th>Message</th><th>Author</th></tr>\n");
while ((commit = get_revision(&rev)) != NULL && n++ < 100) {
cgit_print_commit_shortlog(commit);
free(commit->buffer);
commit->buffer = NULL;
free_commit_list(commit->parents);
commit->parents = NULL;
}
html("</table>\n");
}
static void cgit_print_repo_summary()
{
html("<h2>");
html_txt("Repo summary page");
html("</h2>");
cgit_print_branches();
}
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)){
htmlf(cgit_error, "Bad hex value");
return;
}
if (sha1_object_info(sha1, type, NULL)){
htmlf(cgit_error, "Bad object name");
return;
}
buf = read_sha1_file(sha1, type, &size);
if (!buf) {
htmlf(cgit_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()
{
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);
cgit_print_pageheader(title);
htmlf(cgit_lib_error, "Unable to scan repository",
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);
cgit_print_pageheader(title);
if (!cgit_query_page)
cgit_print_repo_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();
else
cgit_print_repolist();
}
static void cgit_refresh_cache(struct cacheitem *item)
{
top:
if (!cache_lookup(item)) {
if (cache_lock(item)) {
cgit_fill_cache(item);
cache_unlock(item);
} else {
sched_yield();
goto top;
}
} else if (cache_expired(item)) {
if (cache_lock(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;
}
