/* 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[] = "\n"; const char cgit_error[] = "
%s
"; const char cgit_lib_error[] = "
%s: %s
"; 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; 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(""); 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(""); pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, buf, sizeof(buf), 0, NULL, NULL, 0); html_txt(buf); html("\n"); } else { html(""); html_txt(buf); html(""); htmlf("*** bad ref %s", sha1_to_hex(sha1)); html("\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("\n"); html("\n"); html(""); html_txt(title); html("\n"); htmlf("\n", cgit_version); html("\n"); html("\n"); html("\n"); } static void cgit_print_docend() { html("\n\n"); } static void cgit_print_pageheader(char *title) { html(""); } 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("

Repositories

\n"); html(""); html("\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("\n"); } closedir(d); html("
NameDescriptionOwner
"); html_link_open(cgit_repourl(de->d_name), NULL, NULL); html_txt(cgit_repo_name); html_link_close(); html(""); html_txt(cgit_repo_desc); html(""); html_txt(cgit_repo_owner); html("
"); cgit_print_docend(); } static void cgit_print_branches() { html(""); html("\n"); for_each_branch_ref(cgit_print_branch_cb, NULL); html("
Branch nameHead commit
"); } 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(""); strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time); html_txt(buf); html(""); 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(""); html_txt(author); html("\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("

Log

"); html(""); html("\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("
DateMessageAuthor
\n"); } static void cgit_print_repo_summary() { html("

"); html_txt("Repo summary page"); html("

"); 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("

Object view

"); htmlf("sha1=%s
type=%s
size=%i
", hex, type, size); html("
");
	html_txt(buf);
	html("
"); } 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) { 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; }