X-Git-Url: https://gitweb.ps.run/ps-cgit/blobdiff_plain/ce1c7336e5b3e3ebe8f8c9029c405aedec98c208..ad230267f8ecae6cb4f0da17d7a5f75ba38203e2:/cgit.c

diff --git a/cgit.c b/cgit.c
index 0fa203c..53ab68d 100644
--- a/cgit.c
+++ b/cgit.c
@@ -1,219 +1,784 @@
 /* cgit.c: cgi for the git scm
  *
  * Copyright (C) 2006 Lars Hjemli
+ * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
+#include "cache.h"
+#include "cmd.h"
+#include "configfile.h"
+#include "html.h"
+#include "ui-shared.h"
+#include "ui-stats.h"
+#include "scan-tree.h"
 
-const char cgit_version[] = CGIT_VERSION;
+const char *cgit_version = CGIT_VERSION;
 
+void add_mimetype(const char *name, const char *value)
+{
+	struct string_list_item *item;
+
+	item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
+	item->util = xstrdup(value);
+}
 
-static struct repoinfo *cgit_get_repoinfo(char *url)
+struct cgit_filter *new_filter(const char *cmd, int extra_args)
 {
-	int i;
-	struct repoinfo *repo;
-	
-	for (i=0; i<cgit_repolist.count; i++) {
-		repo = &cgit_repolist.repos[i];
-		if (!strcmp(repo->url, url))
-			return repo;
+	struct cgit_filter *f;
+
+	if (!cmd || !cmd[0])
+		return NULL;
+
+	f = xmalloc(sizeof(struct cgit_filter));
+	f->cmd = xstrdup(cmd);
+	f->argv = xmalloc((2 + extra_args) * sizeof(char *));
+	f->argv[0] = f->cmd;
+	f->argv[1] = NULL;
+	return f;
+}
+
+static void process_cached_repolist(const char *path);
+
+void repo_config(struct cgit_repo *repo, const char *name, const char *value)
+{
+	if (!strcmp(name, "name"))
+		repo->name = xstrdup(value);
+	else if (!strcmp(name, "clone-url"))
+		repo->clone_url = xstrdup(value);
+	else if (!strcmp(name, "desc"))
+		repo->desc = xstrdup(value);
+	else if (!strcmp(name, "owner"))
+		repo->owner = xstrdup(value);
+	else if (!strcmp(name, "defbranch"))
+		repo->defbranch = xstrdup(value);
+	else if (!strcmp(name, "snapshots"))
+		repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
+	else if (!strcmp(name, "enable-commit-graph"))
+		repo->enable_commit_graph = ctx.cfg.enable_commit_graph * atoi(value);
+	else if (!strcmp(name, "enable-log-filecount"))
+		repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
+	else if (!strcmp(name, "enable-log-linecount"))
+		repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
+	else if (!strcmp(name, "enable-remote-branches"))
+		repo->enable_remote_branches = atoi(value);
+	else if (!strcmp(name, "enable-subject-links"))
+		repo->enable_subject_links = atoi(value);
+	else if (!strcmp(name, "max-stats"))
+		repo->max_stats = cgit_find_stats_period(value, NULL);
+	else if (!strcmp(name, "module-link"))
+		repo->module_link= xstrdup(value);
+	else if (!strcmp(name, "section"))
+		repo->section = xstrdup(value);
+	else if (!strcmp(name, "readme") && value != NULL) {
+		repo->readme = xstrdup(value);
+	} else if (ctx.cfg.enable_filter_overrides) {
+		if (!strcmp(name, "about-filter"))
+			repo->about_filter = new_filter(value, 0);
+		else if (!strcmp(name, "commit-filter"))
+			repo->commit_filter = new_filter(value, 0);
+		else if (!strcmp(name, "source-filter"))
+			repo->source_filter = new_filter(value, 1);
 	}
-	return NULL;
 }
 
+void config_cb(const char *name, const char *value)
+{
+	if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
+		ctx.cfg.section = xstrdup(value);
+	else if (!strcmp(name, "repo.url"))
+		ctx.repo = cgit_add_repo(value);
+	else if (ctx.repo && !strcmp(name, "repo.path"))
+		ctx.repo->path = trim_end(value, '/');
+	else if (ctx.repo && !prefixcmp(name, "repo."))
+		repo_config(ctx.repo, name + 5, value);
+	else if (!strcmp(name, "readme"))
+		ctx.cfg.readme = xstrdup(value);
+	else if (!strcmp(name, "root-title"))
+		ctx.cfg.root_title = xstrdup(value);
+	else if (!strcmp(name, "root-desc"))
+		ctx.cfg.root_desc = xstrdup(value);
+	else if (!strcmp(name, "root-readme"))
+		ctx.cfg.root_readme = xstrdup(value);
+	else if (!strcmp(name, "css"))
+		ctx.cfg.css = xstrdup(value);
+	else if (!strcmp(name, "favicon"))
+		ctx.cfg.favicon = xstrdup(value);
+	else if (!strcmp(name, "footer"))
+		ctx.cfg.footer = xstrdup(value);
+	else if (!strcmp(name, "head-include"))
+		ctx.cfg.head_include = xstrdup(value);
+	else if (!strcmp(name, "header"))
+		ctx.cfg.header = xstrdup(value);
+	else if (!strcmp(name, "logo"))
+		ctx.cfg.logo = xstrdup(value);
+	else if (!strcmp(name, "index-header"))
+		ctx.cfg.index_header = xstrdup(value);
+	else if (!strcmp(name, "index-info"))
+		ctx.cfg.index_info = xstrdup(value);
+	else if (!strcmp(name, "logo-link"))
+		ctx.cfg.logo_link = xstrdup(value);
+	else if (!strcmp(name, "module-link"))
+		ctx.cfg.module_link = xstrdup(value);
+	else if (!strcmp(name, "strict-export"))
+		ctx.cfg.strict_export = xstrdup(value);
+	else if (!strcmp(name, "virtual-root")) {
+		ctx.cfg.virtual_root = trim_end(value, '/');
+		if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
+			ctx.cfg.virtual_root = "";
+	} else if (!strcmp(name, "nocache"))
+		ctx.cfg.nocache = atoi(value);
+	else if (!strcmp(name, "noplainemail"))
+		ctx.cfg.noplainemail = atoi(value);
+	else if (!strcmp(name, "noheader"))
+		ctx.cfg.noheader = atoi(value);
+	else if (!strcmp(name, "snapshots"))
+		ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
+	else if (!strcmp(name, "enable-filter-overrides"))
+		ctx.cfg.enable_filter_overrides = atoi(value);
+	else if (!strcmp(name, "enable-gitweb-owner"))
+		ctx.cfg.enable_gitweb_owner = atoi(value);
+	else if (!strcmp(name, "enable-index-links"))
+		ctx.cfg.enable_index_links = atoi(value);
+	else if (!strcmp(name, "enable-commit-graph"))
+		ctx.cfg.enable_commit_graph = atoi(value);
+	else if (!strcmp(name, "enable-log-filecount"))
+		ctx.cfg.enable_log_filecount = atoi(value);
+	else if (!strcmp(name, "enable-log-linecount"))
+		ctx.cfg.enable_log_linecount = atoi(value);
+	else if (!strcmp(name, "enable-remote-branches"))
+		ctx.cfg.enable_remote_branches = atoi(value);
+	else if (!strcmp(name, "enable-subject-links"))
+		ctx.cfg.enable_subject_links = atoi(value);
+	else if (!strcmp(name, "enable-tree-linenumbers"))
+		ctx.cfg.enable_tree_linenumbers = atoi(value);
+	else if (!strcmp(name, "max-stats"))
+		ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
+	else if (!strcmp(name, "cache-size"))
+		ctx.cfg.cache_size = atoi(value);
+	else if (!strcmp(name, "cache-root"))
+		ctx.cfg.cache_root = xstrdup(expand_macros(value));
+	else if (!strcmp(name, "cache-root-ttl"))
+		ctx.cfg.cache_root_ttl = atoi(value);
+	else if (!strcmp(name, "cache-repo-ttl"))
+		ctx.cfg.cache_repo_ttl = atoi(value);
+	else if (!strcmp(name, "cache-scanrc-ttl"))
+		ctx.cfg.cache_scanrc_ttl = atoi(value);
+	else if (!strcmp(name, "cache-static-ttl"))
+		ctx.cfg.cache_static_ttl = atoi(value);
+	else if (!strcmp(name, "cache-dynamic-ttl"))
+		ctx.cfg.cache_dynamic_ttl = atoi(value);
+	else if (!strcmp(name, "about-filter"))
+		ctx.cfg.about_filter = new_filter(value, 0);
+	else if (!strcmp(name, "commit-filter"))
+		ctx.cfg.commit_filter = new_filter(value, 0);
+	else if (!strcmp(name, "embedded"))
+		ctx.cfg.embedded = atoi(value);
+	else if (!strcmp(name, "max-atom-items"))
+		ctx.cfg.max_atom_items = atoi(value);
+	else if (!strcmp(name, "max-message-length"))
+		ctx.cfg.max_msg_len = atoi(value);
+	else if (!strcmp(name, "max-repodesc-length"))
+		ctx.cfg.max_repodesc_len = atoi(value);
+	else if (!strcmp(name, "max-blob-size"))
+		ctx.cfg.max_blob_size = atoi(value);
+	else if (!strcmp(name, "max-repo-count"))
+		ctx.cfg.max_repo_count = atoi(value);
+	else if (!strcmp(name, "max-commit-count"))
+		ctx.cfg.max_commit_count = atoi(value);
+	else if (!strcmp(name, "project-list"))
+		ctx.cfg.project_list = xstrdup(expand_macros(value));
+	else if (!strcmp(name, "scan-path"))
+		if (!ctx.cfg.nocache && ctx.cfg.cache_size)
+			process_cached_repolist(expand_macros(value));
+		else if (ctx.cfg.project_list)
+			scan_projects(expand_macros(value),
+				      ctx.cfg.project_list, repo_config);
+		else
+			scan_tree(expand_macros(value), repo_config);
+	else if (!strcmp(name, "section-from-path"))
+		ctx.cfg.section_from_path = atoi(value);
+	else if (!strcmp(name, "source-filter"))
+		ctx.cfg.source_filter = new_filter(value, 1);
+	else if (!strcmp(name, "summary-log"))
+		ctx.cfg.summary_log = atoi(value);
+	else if (!strcmp(name, "summary-branches"))
+		ctx.cfg.summary_branches = atoi(value);
+	else if (!strcmp(name, "summary-tags"))
+		ctx.cfg.summary_tags = atoi(value);
+	else if (!strcmp(name, "side-by-side-diffs"))
+		ctx.cfg.ssdiff = atoi(value);
+	else if (!strcmp(name, "agefile"))
+		ctx.cfg.agefile = xstrdup(value);
+	else if (!strcmp(name, "renamelimit"))
+		ctx.cfg.renamelimit = atoi(value);
+	else if (!strcmp(name, "remove-suffix"))
+		ctx.cfg.remove_suffix = atoi(value);
+	else if (!strcmp(name, "robots"))
+		ctx.cfg.robots = xstrdup(value);
+	else if (!strcmp(name, "clone-prefix"))
+		ctx.cfg.clone_prefix = xstrdup(value);
+	else if (!strcmp(name, "local-time"))
+		ctx.cfg.local_time = atoi(value);
+	else if (!prefixcmp(name, "mimetype."))
+		add_mimetype(name + 9, value);
+	else if (!strcmp(name, "include"))
+		parse_configfile(expand_macros(value), config_cb);
+}
+
+static void querystring_cb(const char *name, const char *value)
+{
+	if (!value)
+		value = "";
+
+	if (!strcmp(name,"r")) {
+		ctx.qry.repo = xstrdup(value);
+		ctx.repo = cgit_get_repoinfo(value);
+	} else if (!strcmp(name, "p")) {
+		ctx.qry.page = xstrdup(value);
+	} else if (!strcmp(name, "url")) {
+		if (*value == '/')
+			value++;
+		ctx.qry.url = xstrdup(value);
+		cgit_parse_url(value);
+	} else if (!strcmp(name, "qt")) {
+		ctx.qry.grep = xstrdup(value);
+	} else if (!strcmp(name, "q")) {
+		ctx.qry.search = xstrdup(value);
+	} else if (!strcmp(name, "h")) {
+		ctx.qry.head = xstrdup(value);
+		ctx.qry.has_symref = 1;
+	} else if (!strcmp(name, "id")) {
+		ctx.qry.sha1 = xstrdup(value);
+		ctx.qry.has_sha1 = 1;
+	} else if (!strcmp(name, "id2")) {
+		ctx.qry.sha2 = xstrdup(value);
+		ctx.qry.has_sha1 = 1;
+	} else if (!strcmp(name, "ofs")) {
+		ctx.qry.ofs = atoi(value);
+	} else if (!strcmp(name, "path")) {
+		ctx.qry.path = trim_end(value, '/');
+	} else if (!strcmp(name, "name")) {
+		ctx.qry.name = xstrdup(value);
+	} else if (!strcmp(name, "mimetype")) {
+		ctx.qry.mimetype = xstrdup(value);
+	} else if (!strcmp(name, "s")){
+		ctx.qry.sort = xstrdup(value);
+	} else if (!strcmp(name, "showmsg")) {
+		ctx.qry.showmsg = atoi(value);
+	} else if (!strcmp(name, "period")) {
+		ctx.qry.period = xstrdup(value);
+	} else if (!strcmp(name, "ss")) {
+		ctx.qry.ssdiff = atoi(value);
+	} else if (!strcmp(name, "all")) {
+		ctx.qry.show_all = atoi(value);
+	} else if (!strcmp(name, "context")) {
+		ctx.qry.context = atoi(value);
+	} else if (!strcmp(name, "ignorews")) {
+		ctx.qry.ignorews = atoi(value);
+	}
+}
+
+char *xstrdupn(const char *str)
+{
+	return (str ? xstrdup(str) : NULL);
+}
+
+static void prepare_context(struct cgit_context *ctx)
+{
+	memset(ctx, 0, sizeof(*ctx));
+	ctx->cfg.agefile = "info/web/last-modified";
+	ctx->cfg.nocache = 0;
+	ctx->cfg.cache_size = 0;
+	ctx->cfg.cache_dynamic_ttl = 5;
+	ctx->cfg.cache_max_create_time = 5;
+	ctx->cfg.cache_repo_ttl = 5;
+	ctx->cfg.cache_root = CGIT_CACHE_ROOT;
+	ctx->cfg.cache_root_ttl = 5;
+	ctx->cfg.cache_scanrc_ttl = 15;
+	ctx->cfg.cache_static_ttl = -1;
+	ctx->cfg.css = "/cgit.css";
+	ctx->cfg.logo = "/cgit.png";
+	ctx->cfg.local_time = 0;
+	ctx->cfg.enable_gitweb_owner = 1;
+	ctx->cfg.enable_tree_linenumbers = 1;
+	ctx->cfg.max_repo_count = 50;
+	ctx->cfg.max_commit_count = 50;
+	ctx->cfg.max_lock_attempts = 5;
+	ctx->cfg.max_msg_len = 80;
+	ctx->cfg.max_repodesc_len = 80;
+	ctx->cfg.max_blob_size = 0;
+	ctx->cfg.max_stats = 0;
+	ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
+	ctx->cfg.project_list = NULL;
+	ctx->cfg.renamelimit = -1;
+	ctx->cfg.remove_suffix = 0;
+	ctx->cfg.robots = "index, nofollow";
+	ctx->cfg.root_title = "Git repository browser";
+	ctx->cfg.root_desc = "a fast webinterface for the git dscm";
+	ctx->cfg.script_name = CGIT_SCRIPT_NAME;
+	ctx->cfg.section = "";
+	ctx->cfg.summary_branches = 10;
+	ctx->cfg.summary_log = 10;
+	ctx->cfg.summary_tags = 10;
+	ctx->cfg.max_atom_items = 10;
+	ctx->cfg.ssdiff = 0;
+	ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
+	ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
+	ctx->env.https = xstrdupn(getenv("HTTPS"));
+	ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
+	ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
+	ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
+	ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
+	ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
+	ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
+	ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
+	ctx->page.mimetype = "text/html";
+	ctx->page.charset = PAGE_ENCODING;
+	ctx->page.filename = NULL;
+	ctx->page.size = 0;
+	ctx->page.modified = time(NULL);
+	ctx->page.expires = ctx->page.modified;
+	ctx->page.etag = NULL;
+	memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
+	if (ctx->env.script_name)
+		ctx->cfg.script_name = ctx->env.script_name;
+	if (ctx->env.query_string)
+		ctx->qry.raw = ctx->env.query_string;
+	if (!ctx->env.cgit_config)
+		ctx->env.cgit_config = CGIT_CONFIG;
+}
+
+struct refmatch {
+	char *req_ref;
+	char *first_ref;
+	int match;
+};
+
+int find_current_ref(const char *refname, const unsigned char *sha1,
+		     int flags, void *cb_data)
+{
+	struct refmatch *info;
+
+	info = (struct refmatch *)cb_data;
+	if (!strcmp(refname, info->req_ref))
+		info->match = 1;
+	if (!info->first_ref)
+		info->first_ref = xstrdup(refname);
+	return info->match;
+}
+
+char *find_default_branch(struct cgit_repo *repo)
+{
+	struct refmatch info;
+	char *ref;
+
+	info.req_ref = repo->defbranch;
+	info.first_ref = NULL;
+	info.match = 0;
+	for_each_branch_ref(find_current_ref, &info);
+	if (info.match)
+		ref = info.req_ref;
+	else
+		ref = info.first_ref;
+	if (ref)
+		ref = xstrdup(ref);
+	return ref;
+}
 
-static int cgit_prepare_cache(struct cacheitem *item)
+static int prepare_repo_cmd(struct cgit_context *ctx)
 {
-	if (!cgit_query_repo) {
-		item->name = xstrdup(fmt("%s/index.html", cgit_cache_root));
-		item->ttl = cgit_cache_root_ttl;
+	char *tmp;
+	unsigned char sha1[20];
+	int nongit = 0;
+
+	setenv("GIT_DIR", ctx->repo->path, 1);
+	setup_git_directory_gently(&nongit);
+	if (nongit) {
+		ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
+				      "config error");
+		tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
+		ctx->repo = NULL;
+		cgit_print_http_headers(ctx);
+		cgit_print_docstart(ctx);
+		cgit_print_pageheader(ctx);
+		cgit_print_error(tmp);
+		cgit_print_docend();
 		return 1;
 	}
-	cgit_repo = cgit_get_repoinfo(cgit_query_repo);
-	if (!cgit_repo) {
-		char *title = fmt("%s - %s", cgit_root_title, "Bad request");
-		cgit_print_docstart(title, item);
-		cgit_print_pageheader(title, 0);
-		cgit_print_error(fmt("Unknown repo: %s", cgit_query_repo));
+	ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
+
+	if (!ctx->qry.head) {
+		ctx->qry.nohead = 1;
+		ctx->qry.head = find_default_branch(ctx->repo);
+		ctx->repo->defbranch = ctx->qry.head;
+	}
+
+	if (!ctx->qry.head) {
+		cgit_print_http_headers(ctx);
+		cgit_print_docstart(ctx);
+		cgit_print_pageheader(ctx);
+		cgit_print_error("Repository seems to be empty");
 		cgit_print_docend();
-		return 0;
-	}
-
-	if (!cgit_query_page) {
-		item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root, 
-			   cgit_repo->url));
-		item->ttl = cgit_cache_repo_ttl;
-	} else {
-		item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root, 
-			   cgit_repo->url, cgit_query_page, 
-			   cache_safe_filename(cgit_querystring)));
-		if (cgit_query_has_symref)
-			item->ttl = cgit_cache_dynamic_ttl;
-		else if (cgit_query_has_sha1)
-			item->ttl = cgit_cache_static_ttl;
-		else
-			item->ttl = cgit_cache_repo_ttl;
+		return 1;
 	}
-	return 1;
+
+	if (get_sha1(ctx->qry.head, sha1)) {
+		tmp = xstrdup(ctx->qry.head);
+		ctx->qry.head = ctx->repo->defbranch;
+		ctx->page.status = 404;
+		ctx->page.statusmsg = "not found";
+		cgit_print_http_headers(ctx);
+		cgit_print_docstart(ctx);
+		cgit_print_pageheader(ctx);
+		cgit_print_error(fmt("Invalid branch: %s", tmp));
+		cgit_print_docend();
+		return 1;
+	}
+	return 0;
 }
 
-static void cgit_print_repo_page(struct cacheitem *item)
+static void process_request(void *cbdata)
 {
-	char *title;
-	int show_search;
+	struct cgit_context *ctx = cbdata;
+	struct cgit_cmd *cmd;
 
-	if (chdir(cgit_repo->path)) {
-		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)));
+	cmd = cgit_get_cmd(ctx);
+	if (!cmd) {
+		ctx->page.title = "cgit error";
+		cgit_print_http_headers(ctx);
+		cgit_print_docstart(ctx);
+		cgit_print_pageheader(ctx);
+		cgit_print_error("Invalid request");
 		cgit_print_docend();
 		return;
 	}
 
-	title = fmt("%s - %s", cgit_repo->name, cgit_repo->desc);
-	show_search = 0;
-	setenv("GIT_DIR", cgit_repo->path, 1);
-	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, cgit_query_path);
-	} 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);
+	/* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
+	 * in-project path limit to be made available at ctx->qry.vpath.
+	 * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
+	 */
+	ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
+
+	if (cmd->want_repo && !ctx->repo) {
+		cgit_print_http_headers(ctx);
+		cgit_print_docstart(ctx);
+		cgit_print_pageheader(ctx);
+		cgit_print_error(fmt("No repository selected"));
+		cgit_print_docend();
+		return;
+	}
+
+	if (ctx->repo && prepare_repo_cmd(ctx))
+		return;
+
+	if (cmd->want_layout) {
+		cgit_print_http_headers(ctx);
+		cgit_print_docstart(ctx);
+		cgit_print_pageheader(ctx);
+	}
+
+	cmd->fn(ctx);
+
+	if (cmd->want_layout)
+		cgit_print_docend();
 }
 
-static void cgit_check_cache(struct cacheitem *item)
+int cmp_repos(const void *a, const void *b)
 {
-	int i = 0;
+	const struct cgit_repo *ra = a, *rb = b;
+	return strcmp(ra->url, rb->url);
+}
 
- 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);
+char *build_snapshot_setting(int bitmap)
+{
+	const struct cgit_snapshot_format *f;
+	char *result = xstrdup("");
+	char *tmp;
+	int len;
+
+	for (f = cgit_snapshot_formats; f->suffix; f++) {
+		if (f->bit & bitmap) {
+			tmp = result;
+			result = xstrdup(fmt("%s%s ", tmp, f->suffix));
+			free(tmp);
 		}
 	}
+	len = strlen(result);
+	if (len)
+		result[len - 1] = '\0';
+	return result;
 }
 
-static void cgit_print_cache(struct cacheitem *item)
+char *get_first_line(char *txt)
 {
-	static char buf[4096];
-	ssize_t i;
+	char *t = xstrdup(txt);
+	char *p = strchr(t, '\n');
+	if (p)
+		*p = '\0';
+	return t;
+}
 
-	int fd = open(item->name, O_RDONLY);
-	if (fd<0)
-		die("Unable to open cached file %s", item->name);
+void print_repo(FILE *f, struct cgit_repo *repo)
+{
+	fprintf(f, "repo.url=%s\n", repo->url);
+	fprintf(f, "repo.name=%s\n", repo->name);
+	fprintf(f, "repo.path=%s\n", repo->path);
+	if (repo->owner)
+		fprintf(f, "repo.owner=%s\n", repo->owner);
+	if (repo->desc) {
+		char *tmp = get_first_line(repo->desc);
+		fprintf(f, "repo.desc=%s\n", tmp);
+		free(tmp);
+	}
+	if (repo->readme)
+		fprintf(f, "repo.readme=%s\n", repo->readme);
+	if (repo->defbranch)
+		fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
+	if (repo->module_link)
+		fprintf(f, "repo.module-link=%s\n", repo->module_link);
+	if (repo->section)
+		fprintf(f, "repo.section=%s\n", repo->section);
+	if (repo->clone_url)
+		fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
+	fprintf(f, "repo.enable-commit-graph=%d\n",
+	        repo->enable_commit_graph);
+	fprintf(f, "repo.enable-log-filecount=%d\n",
+	        repo->enable_log_filecount);
+	fprintf(f, "repo.enable-log-linecount=%d\n",
+	        repo->enable_log_linecount);
+	if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
+		fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
+	if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
+		fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
+	if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
+		fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
+	if (repo->snapshots != ctx.cfg.snapshots) {
+		char *tmp = build_snapshot_setting(repo->snapshots);
+		fprintf(f, "repo.snapshots=%s\n", tmp);
+		free(tmp);
+	}
+	if (repo->max_stats != ctx.cfg.max_stats)
+		fprintf(f, "repo.max-stats=%s\n",
+		        cgit_find_stats_periodname(repo->max_stats));
+	fprintf(f, "\n");
+}
 
-	while((i=read(fd, buf, sizeof(buf))) > 0)
-		write(STDOUT_FILENO, buf, i);
+void print_repolist(FILE *f, struct cgit_repolist *list, int start)
+{
+	int i;
 
-	close(fd);
+	for(i = start; i < list->count; i++)
+		print_repo(f, &list->repos[i]);
+}
+
+/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
+ * and return 0 on success.
+ */
+static int generate_cached_repolist(const char *path, const char *cached_rc)
+{
+	char *locked_rc;
+	int idx;
+	FILE *f;
+
+	locked_rc = xstrdup(fmt("%s.lock", cached_rc));
+	f = fopen(locked_rc, "wx");
+	if (!f) {
+		/* Inform about the error unless the lockfile already existed,
+		 * since that only means we've got concurrent requests.
+		 */
+		if (errno != EEXIST)
+			fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
+				locked_rc, strerror(errno), errno);
+		return errno;
+	}
+	idx = cgit_repolist.count;
+	if (ctx.cfg.project_list)
+		scan_projects(path, ctx.cfg.project_list, repo_config);
+	else
+		scan_tree(path, repo_config);
+	print_repolist(f, &cgit_repolist, idx);
+	if (rename(locked_rc, cached_rc))
+		fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
+			locked_rc, cached_rc, strerror(errno), errno);
+	fclose(f);
+	return 0;
+}
+
+static void process_cached_repolist(const char *path)
+{
+	struct stat st;
+	char *cached_rc;
+	time_t age;
+	unsigned long hash;
+
+	hash = hash_str(path);
+	if (ctx.cfg.project_list)
+		hash += hash_str(ctx.cfg.project_list);
+	cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
+
+	if (stat(cached_rc, &st)) {
+		/* Nothing is cached, we need to scan without forking. And
+		 * if we fail to generate a cached repolist, we need to
+		 * invoke scan_tree manually.
+		 */
+		if (generate_cached_repolist(path, cached_rc)) {
+			if (ctx.cfg.project_list)
+				scan_projects(path, ctx.cfg.project_list,
+					      repo_config);
+			else
+				scan_tree(path, repo_config);
+		}
+		return;
+	}
+
+	parse_configfile(cached_rc, config_cb);
+
+	/* If the cached configfile hasn't expired, lets exit now */
+	age = time(NULL) - st.st_mtime;
+	if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
+		return;
+
+	/* The cached repolist has been parsed, but it was old. So lets
+	 * rescan the specified path and generate a new cached repolist
+	 * in a child-process to avoid latency for the current request.
+	 */
+	if (fork())
+		return;
+
+	exit(generate_cached_repolist(path, cached_rc));
 }
 
 static void cgit_parse_args(int argc, const char **argv)
 {
 	int i;
+	int scan = 0;
 
 	for (i = 1; i < argc; i++) {
 		if (!strncmp(argv[i], "--cache=", 8)) {
-			cgit_cache_root = xstrdup(argv[i]+8);
+			ctx.cfg.cache_root = xstrdup(argv[i]+8);
 		}
 		if (!strcmp(argv[i], "--nocache")) {
-			cgit_nocache = 1;
+			ctx.cfg.nocache = 1;
+		}
+		if (!strcmp(argv[i], "--nohttp")) {
+			ctx.env.no_http = "1";
 		}
 		if (!strncmp(argv[i], "--query=", 8)) {
-			cgit_querystring = xstrdup(argv[i]+8);
+			ctx.qry.raw = xstrdup(argv[i]+8);
 		}
 		if (!strncmp(argv[i], "--repo=", 7)) {
-			cgit_query_repo = xstrdup(argv[i]+7);
+			ctx.qry.repo = xstrdup(argv[i]+7);
 		}
 		if (!strncmp(argv[i], "--page=", 7)) {
-			cgit_query_page = xstrdup(argv[i]+7);
+			ctx.qry.page = xstrdup(argv[i]+7);
 		}
 		if (!strncmp(argv[i], "--head=", 7)) {
-			cgit_query_head = xstrdup(argv[i]+7);
-			cgit_query_has_symref = 1;
+			ctx.qry.head = xstrdup(argv[i]+7);
+			ctx.qry.has_symref = 1;
 		}
 		if (!strncmp(argv[i], "--sha1=", 7)) {
-			cgit_query_sha1 = xstrdup(argv[i]+7);
-			cgit_query_has_sha1 = 1;
+			ctx.qry.sha1 = xstrdup(argv[i]+7);
+			ctx.qry.has_sha1 = 1;
 		}
 		if (!strncmp(argv[i], "--ofs=", 6)) {
-			cgit_query_ofs = atoi(argv[i]+6);
+			ctx.qry.ofs = atoi(argv[i]+6);
 		}
+		if (!strncmp(argv[i], "--scan-tree=", 12) ||
+		    !strncmp(argv[i], "--scan-path=", 12)) {
+			/* HACK: the global snapshot bitmask defines the
+			 * set of allowed snapshot formats, but the config
+			 * file hasn't been parsed yet so the mask is
+			 * currently 0. By setting all bits high before
+			 * scanning we make sure that any in-repo cgitrc
+			 * snapshot setting is respected by scan_tree().
+			 * BTW: we assume that there'll never be more than
+			 * 255 different snapshot formats supported by cgit...
+			 */
+			ctx.cfg.snapshots = 0xFF;
+			scan++;
+			scan_tree(argv[i] + 12, repo_config);
+		}
+	}
+	if (scan) {
+		qsort(cgit_repolist.repos, cgit_repolist.count,
+			sizeof(struct cgit_repo), cmp_repos);
+		print_repolist(stdout, &cgit_repolist, 0);
+		exit(0);
 	}
 }
 
+static int calc_ttl()
+{
+	if (!ctx.repo)
+		return ctx.cfg.cache_root_ttl;
+
+	if (!ctx.qry.page)
+		return ctx.cfg.cache_repo_ttl;
+
+	if (ctx.qry.has_symref)
+		return ctx.cfg.cache_dynamic_ttl;
+
+	if (ctx.qry.has_sha1)
+		return ctx.cfg.cache_static_ttl;
+
+	return ctx.cfg.cache_repo_ttl;
+}
+
 int main(int argc, const char **argv)
 {
-	struct cacheitem item;
+	const char *path;
+	char *qry;
+	int err, ttl;
 
-	htmlfd = STDOUT_FILENO;
-	item.st.st_mtime = time(NULL);
+	prepare_context(&ctx);
 	cgit_repolist.length = 0;
 	cgit_repolist.count = 0;
 	cgit_repolist.repos = NULL;
 
-	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_prepare_cache(&item))
-		return 0;
-	if (cgit_nocache) {
-		item.fd = STDOUT_FILENO;
-		cgit_fill_cache(&item);
-	} else {
-		cgit_check_cache(&item);
-		cgit_print_cache(&item);
+	parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
+	ctx.repo = NULL;
+	http_parse_querystring(ctx.qry.raw, querystring_cb);
+
+	/* If virtual-root isn't specified in cgitrc, lets pretend
+	 * that virtual-root equals SCRIPT_NAME.
+	 */
+	if (!ctx.cfg.virtual_root)
+		ctx.cfg.virtual_root = ctx.cfg.script_name;
+
+	/* If no url parameter is specified on the querystring, lets
+	 * use PATH_INFO as url. This allows cgit to work with virtual
+	 * urls without the need for rewriterules in the webserver (as
+	 * long as PATH_INFO is included in the cache lookup key).
+	 */
+	path = ctx.env.path_info;
+	if (!ctx.qry.url && path) {
+		if (path[0] == '/')
+			path++;
+		ctx.qry.url = xstrdup(path);
+		if (ctx.qry.raw) {
+			qry = ctx.qry.raw;
+			ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
+			free(qry);
+		} else
+			ctx.qry.raw = xstrdup(ctx.qry.url);
+		cgit_parse_url(ctx.qry.url);
 	}
-	return 0;
+
+	ttl = calc_ttl();
+	ctx.page.expires += ttl*60;
+	if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
+		ctx.cfg.nocache = 1;
+	if (ctx.cfg.nocache)
+		ctx.cfg.cache_size = 0;
+	err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
+			    ctx.qry.raw, ttl, process_request, &ctx);
+	if (err)
+		cgit_print_error(fmt("Error processing page: %s (%d)",
+				     strerror(err), err));
+	return err;
 }