X-Git-Url: https://gitweb.ps.run/ps-cgit/blobdiff_plain/523c133e2e5f7089a3d18ac23f2074b60991a7f0..3cb5d86dc68bab4883bf5a7cbc90f3e266237355:/cgit.c

diff --git a/cgit.c b/cgit.c
index 5816f3d..29e075d 100644
--- a/cgit.c
+++ b/cgit.c
@@ -1,6 +1,7 @@
 /* cgit.c: cgi for the git scm
  *
  * Copyright (C) 2006 Lars Hjemli
+ * Copyright (C) 2010, 2012 Jason A. Donenfeld <Jason@zx2c4.com>
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
@@ -17,32 +18,120 @@
 
 const char *cgit_version = CGIT_VERSION;
 
-void add_mimetype(const char *name, const char *value)
+static void add_mimetype(const char *name, const char *value)
 {
 	struct string_list_item *item;
 
-	item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
+	item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
 	item->util = xstrdup(value);
 }
 
-struct cgit_filter *new_filter(const char *cmd, int extra_args)
+static struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
 {
 	struct cgit_filter *f;
+	int args_size = 0;
+	int extra_args;
 
 	if (!cmd || !cmd[0])
 		return NULL;
 
+	switch (filtertype) {
+		case SOURCE:
+			extra_args = 1;
+			break;
+
+		case ABOUT:
+		case COMMIT:
+		default:
+			extra_args = 0;
+			break;
+	}
+
 	f = xmalloc(sizeof(struct cgit_filter));
 	f->cmd = xstrdup(cmd);
-	f->argv = xmalloc((2 + extra_args) * sizeof(char *));
+	args_size = (2 + extra_args) * sizeof(char *);
+	f->argv = xmalloc(args_size);
+	memset(f->argv, 0, args_size);
 	f->argv[0] = f->cmd;
-	f->argv[1] = NULL;
 	return f;
 }
 
-void config_cb(const char *name, const char *value)
+static void process_cached_repolist(const char *path);
+
+static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
 {
-	if (!strcmp(name, "root-title"))
+	struct string_list_item *item;
+
+	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 = atoi(value);
+	else if (!strcmp(name, "enable-log-filecount"))
+		repo->enable_log_filecount = atoi(value);
+	else if (!strcmp(name, "enable-log-linecount"))
+		repo->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, "branch-sort")) {
+		if (!strcmp(value, "age"))
+			repo->branch_sort = 1;
+		if (!strcmp(value, "name"))
+			repo->branch_sort = 0;
+	} else if (!strcmp(name, "commit-sort")) {
+		if (!strcmp(value, "date"))
+			repo->commit_sort = 1;
+		if (!strcmp(value, "topo"))
+			repo->commit_sort = 2;
+	} 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 (!prefixcmp(name, "module-link.")) {
+		item = string_list_append(&repo->submodules, name + 12);
+		item->util = xstrdup(value);
+	} else if (!strcmp(name, "section"))
+		repo->section = xstrdup(value);
+	else if (!strcmp(name, "readme") && value != NULL)
+		repo->readme = xstrdup(value);
+	else if (!strcmp(name, "logo") && value != NULL)
+		repo->logo = xstrdup(value);
+	else if (!strcmp(name, "logo-link") && value != NULL)
+		repo->logo_link = xstrdup(value);
+	else if (ctx.cfg.enable_filter_overrides) {
+		if (!strcmp(name, "about-filter"))
+			repo->about_filter = new_filter(value, ABOUT);
+		else if (!strcmp(name, "commit-filter"))
+			repo->commit_filter = new_filter(value, COMMIT);
+		else if (!strcmp(name, "source-filter"))
+			repo->source_filter = new_filter(value, SOURCE);
+	}
+}
+
+static 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);
@@ -68,10 +157,10 @@ void config_cb(const char *name, const char *value)
 		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 = "";
+		ctx.cfg.virtual_root = ensure_end(value, '/');
 	} else if (!strcmp(name, "nocache"))
 		ctx.cfg.nocache = atoi(value);
 	else if (!strcmp(name, "noplainemail"))
@@ -80,99 +169,122 @@ void config_cb(const char *name, const char *value)
 		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-http-clone"))
+		ctx.cfg.enable_http_clone = atoi(value);
 	else if (!strcmp(name, "enable-index-links"))
 		ctx.cfg.enable_index_links = atoi(value);
+	else if (!strcmp(name, "enable-index-owner"))
+		ctx.cfg.enable_index_owner = 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, "enable-git-config"))
+		ctx.cfg.enable_git_config = 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(value);
+		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, "case-sensitive-sort"))
+		ctx.cfg.case_sensitive_sort = atoi(value);
 	else if (!strcmp(name, "about-filter"))
-		ctx.cfg.about_filter = new_filter(value, 0);
+		ctx.cfg.about_filter = new_filter(value, ABOUT);
 	else if (!strcmp(name, "commit-filter"))
-		ctx.cfg.commit_filter = new_filter(value, 0);
+		ctx.cfg.commit_filter = new_filter(value, COMMIT);
 	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, "scan-hidden-path"))
+		ctx.cfg.scan_hidden_path = atoi(value);
+	else if (!strcmp(name, "section-from-path"))
+		ctx.cfg.section_from_path = atoi(value);
+	else if (!strcmp(name, "repository-sort"))
+		ctx.cfg.repository_sort = xstrdup(value);
+	else if (!strcmp(name, "section-sort"))
+		ctx.cfg.section_sort = atoi(value);
 	else if (!strcmp(name, "source-filter"))
-		ctx.cfg.source_filter = new_filter(value, 1);
+		ctx.cfg.source_filter = new_filter(value, SOURCE);
 	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, "mimetype-file"))
+		ctx.cfg.mimetype_file = 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, "clone-url"))
+		ctx.cfg.clone_url = xstrdup(value);
 	else if (!strcmp(name, "local-time"))
 		ctx.cfg.local_time = atoi(value);
-	else if (!prefixcmp(name, "mimetype."))
+	else if (!strcmp(name, "commit-sort")) {
+		if (!strcmp(value, "date"))
+			ctx.cfg.commit_sort = 1;
+		if (!strcmp(value, "topo"))
+			ctx.cfg.commit_sort = 2;
+	} else if (!strcmp(name, "branch-sort")) {
+		if (!strcmp(value, "age"))
+			ctx.cfg.branch_sort = 1;
+		if (!strcmp(value, "name"))
+			ctx.cfg.branch_sort = 0;
+	} else if (!prefixcmp(name, "mimetype."))
 		add_mimetype(name + 9, value);
-	else if (!strcmp(name, "repo.group"))
-		ctx.cfg.repo_group = xstrdup(value);
-	else if (!strcmp(name, "repo.url"))
-		ctx.repo = cgit_add_repo(value);
-	else if (!strcmp(name, "repo.name"))
-		ctx.repo->name = xstrdup(value);
-	else if (ctx.repo && !strcmp(name, "repo.path"))
-		ctx.repo->path = trim_end(value, '/');
-	else if (ctx.repo && !strcmp(name, "repo.clone-url"))
-		ctx.repo->clone_url = xstrdup(value);
-	else if (ctx.repo && !strcmp(name, "repo.desc"))
-		ctx.repo->desc = xstrdup(value);
-	else if (ctx.repo && !strcmp(name, "repo.owner"))
-		ctx.repo->owner = xstrdup(value);
-	else if (ctx.repo && !strcmp(name, "repo.defbranch"))
-		ctx.repo->defbranch = xstrdup(value);
-	else if (ctx.repo && !strcmp(name, "repo.snapshots"))
-		ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
-	else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
-		ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
-	else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
-		ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
-	else if (ctx.repo && !strcmp(name, "repo.max-stats"))
-		ctx.repo->max_stats = cgit_find_stats_period(value, NULL);
-	else if (ctx.repo && !strcmp(name, "repo.module-link"))
-		ctx.repo->module_link= xstrdup(value);
-	else if (ctx.repo && !strcmp(name, "repo.about-filter"))
-		ctx.repo->about_filter = new_filter(value, 0);
-	else if (ctx.repo && !strcmp(name, "repo.commit-filter"))
-		ctx.repo->commit_filter = new_filter(value, 0);
-	else if (ctx.repo && !strcmp(name, "repo.source-filter"))
-		ctx.repo->source_filter = new_filter(value, 1);
-	else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
-		if (*value == '/')
-			ctx.repo->readme = xstrdup(value);
-		else
-			ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
-	} else if (!strcmp(name, "include"))
-		parse_configfile(value, config_cb);
+	else if (!strcmp(name, "include"))
+		parse_configfile(expand_macros(value), config_cb);
 }
 
 static void querystring_cb(const char *name, const char *value)
@@ -186,6 +298,8 @@ static void querystring_cb(const char *name, const char *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")) {
@@ -209,23 +323,27 @@ static void querystring_cb(const char *name, const char *value)
 		ctx.qry.name = xstrdup(value);
 	} else if (!strcmp(name, "mimetype")) {
 		ctx.qry.mimetype = xstrdup(value);
-	} else if (!strcmp(name, "s")){
+	} 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);
+		ctx.qry.has_ssdiff = 1;
+	} 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));
+	memset(ctx, 0, sizeof(*ctx));
 	ctx->cfg.agefile = "info/web/last-modified";
 	ctx->cfg.nocache = 0;
 	ctx->cfg.cache_size = 0;
@@ -234,35 +352,51 @@ static void prepare_context(struct cgit_context *ctx)
 	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.case_sensitive_sort = 1;
+	ctx->cfg.branch_sort = 0;
+	ctx->cfg.commit_sort = 0;
 	ctx->cfg.css = "/cgit.css";
 	ctx->cfg.logo = "/cgit.png";
 	ctx->cfg.local_time = 0;
+	ctx->cfg.enable_http_clone = 1;
+	ctx->cfg.enable_index_owner = 1;
+	ctx->cfg.enable_tree_linenumbers = 1;
+	ctx->cfg.enable_git_config = 0;
 	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.scan_hidden_path = 0;
 	ctx->cfg.script_name = CGIT_SCRIPT_NAME;
+	ctx->cfg.section = "";
+	ctx->cfg.repository_sort = "name";
+	ctx->cfg.section_sort = 1;
 	ctx->cfg.summary_branches = 10;
 	ctx->cfg.summary_log = 10;
 	ctx->cfg.summary_tags = 10;
-	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->cfg.max_atom_items = 10;
+	ctx->cfg.ssdiff = 0;
+	ctx->env.cgit_config = getenv("CGIT_CONFIG");
+	ctx->env.http_host = getenv("HTTP_HOST");
+	ctx->env.https = getenv("HTTPS");
+	ctx->env.no_http = getenv("NO_HTTP");
+	ctx->env.path_info = getenv("PATH_INFO");
+	ctx->env.query_string = getenv("QUERY_STRING");
+	ctx->env.request_method = getenv("REQUEST_METHOD");
+	ctx->env.script_name = getenv("SCRIPT_NAME");
+	ctx->env.server_name = getenv("SERVER_NAME");
+	ctx->env.server_port = getenv("SERVER_PORT");
 	ctx->page.mimetype = "text/html";
 	ctx->page.charset = PAGE_ENCODING;
 	ctx->page.filename = NULL;
@@ -272,9 +406,9 @@ static void prepare_context(struct cgit_context *ctx)
 	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;
+		ctx->cfg.script_name = xstrdup(ctx->env.script_name);
 	if (ctx->env.query_string)
-		ctx->qry.raw = ctx->env.query_string;
+		ctx->qry.raw = xstrdup(ctx->env.query_string);
 	if (!ctx->env.cgit_config)
 		ctx->env.cgit_config = CGIT_CONFIG;
 }
@@ -285,8 +419,8 @@ struct refmatch {
 	int match;
 };
 
-int find_current_ref(const char *refname, const unsigned char *sha1,
-		     int flags, void *cb_data)
+static int find_current_ref(const char *refname, const unsigned char *sha1,
+			    int flags, void *cb_data)
 {
 	struct refmatch *info;
 
@@ -298,7 +432,13 @@ int find_current_ref(const char *refname, const unsigned char *sha1,
 	return info->match;
 }
 
-char *find_default_branch(struct cgit_repo *repo)
+static void free_refmatch_inner(struct refmatch *info)
+{
+	if (info->first_ref)
+		free(info->first_ref);
+}
+
+static char *find_default_branch(struct cgit_repo *repo)
 {
 	struct refmatch info;
 	char *ref;
@@ -313,35 +453,65 @@ char *find_default_branch(struct cgit_repo *repo)
 		ref = info.first_ref;
 	if (ref)
 		ref = xstrdup(ref);
+	free_refmatch_inner(&info);
+
 	return ref;
 }
 
+static char *guess_defbranch(void)
+{
+	const char *ref;
+	unsigned char sha1[20];
+
+	ref = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
+	if (!ref || prefixcmp(ref, "refs/heads/"))
+		return "master";
+	return xstrdup(ref + 11);
+}
+
 static int prepare_repo_cmd(struct cgit_context *ctx)
 {
-	char *tmp;
 	unsigned char sha1[20];
 	int nongit = 0;
+	int rc;
 
+	/* The path to the git repository. */
 	setenv("GIT_DIR", ctx->repo->path, 1);
+
+	/* Do not look in /etc/ for gitconfig and gitattributes. */
+	setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
+	setenv("GIT_ATTR_NOSYSTEM", "1", 1);
+	unsetenv("HOME");
+	unsetenv("XDG_CONFIG_HOME");
+
+	/* Setup the git directory and initialize the notes system. Both of these
+	 * load local configuration from the git repository, so we do them both while
+	 * the HOME variables are unset. */
 	setup_git_directory_gently(&nongit);
+	init_display_notes(NULL);
+
 	if (nongit) {
-		ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
-				      "config error");
-		tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
+		const char *name = ctx->repo->name;
+		rc = errno;
+		ctx->page.title = fmtalloc("%s - %s", ctx->cfg.root_title,
+						"config error");
 		ctx->repo = NULL;
 		cgit_print_http_headers(ctx);
 		cgit_print_docstart(ctx);
 		cgit_print_pageheader(ctx);
-		cgit_print_error(tmp);
+		cgit_print_error("Failed to open %s: %s", name,
+				 rc ? strerror(rc) : "Not a valid git repository");
 		cgit_print_docend();
 		return 1;
 	}
-	ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
+	ctx->page.title = fmtalloc("%s - %s", ctx->repo->name, ctx->repo->desc);
+
+	if (!ctx->repo->defbranch)
+		ctx->repo->defbranch = guess_defbranch();
 
 	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) {
@@ -354,17 +524,19 @@ static int prepare_repo_cmd(struct cgit_context *ctx)
 	}
 
 	if (get_sha1(ctx->qry.head, sha1)) {
-		tmp = xstrdup(ctx->qry.head);
+		char *tmp = xstrdup(ctx->qry.head);
 		ctx->qry.head = ctx->repo->defbranch;
 		ctx->page.status = 404;
-		ctx->page.statusmsg = "not found";
+		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_error("Invalid branch: %s", tmp);
 		cgit_print_docend();
 		return 1;
 	}
+	sort_string_list(&ctx->repo->submodules);
+	cgit_prepare_repo_env(ctx->repo);
 	return 0;
 }
 
@@ -376,6 +548,8 @@ static void process_request(void *cbdata)
 	cmd = cgit_get_cmd(ctx);
 	if (!cmd) {
 		ctx->page.title = "cgit error";
+		ctx->page.status = 404;
+		ctx->page.statusmsg = "Not found";
 		cgit_print_http_headers(ctx);
 		cgit_print_docstart(ctx);
 		cgit_print_pageheader(ctx);
@@ -384,11 +558,22 @@ static void process_request(void *cbdata)
 		return;
 	}
 
+	if (!ctx->cfg.enable_http_clone && cmd->is_clone) {
+		html_status(404, "Not found", 0);
+		return;
+	}
+
+	/* 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_error("No repository selected");
 		cgit_print_docend();
 		return;
 	}
@@ -408,34 +593,185 @@ static void process_request(void *cbdata)
 		cgit_print_docend();
 }
 
-int cmp_repos(const void *a, const void *b)
+static int cmp_repos(const void *a, const void *b)
 {
 	const struct cgit_repo *ra = a, *rb = b;
 	return strcmp(ra->url, rb->url);
 }
 
-void print_repo(struct cgit_repo *repo)
+static char *build_snapshot_setting(int bitmap)
+{
+	const struct cgit_snapshot_format *f;
+	struct strbuf result = STRBUF_INIT;
+
+	for (f = cgit_snapshot_formats; f->suffix; f++) {
+		if (f->bit & bitmap) {
+			if (result.len)
+				strbuf_addch(&result, ' ');
+			strbuf_addstr(&result, f->suffix);
+		}
+	}
+	return strbuf_detach(&result, NULL);
+}
+
+static char *get_first_line(char *txt)
+{
+	char *t = xstrdup(txt);
+	char *p = strchr(t, '\n');
+	if (p)
+		*p = '\0';
+	return t;
+}
+
+static void print_repo(FILE *f, struct cgit_repo *repo)
 {
-	printf("repo.url=%s\n", repo->url);
-	printf("repo.name=%s\n", repo->name);
-	printf("repo.path=%s\n", repo->path);
+	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)
-		printf("repo.owner=%s\n", repo->owner);
-	if (repo->desc)
-		printf("repo.desc=%s\n", repo->desc);
+		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)
-		printf("repo.readme=%s\n", repo->readme);
-	printf("\n");
+		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 ? 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));
+	if (repo->logo)
+		fprintf(f, "repo.logo=%s\n", repo->logo);
+	if (repo->logo_link)
+		fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
+	fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
+	fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
+	if (repo->branch_sort == 1)
+		fprintf(f, "repo.branch-sort=age\n");
+	if (repo->commit_sort) {
+		if (repo->commit_sort == 1)
+			fprintf(f, "repo.commit-sort=date\n");
+		else if (repo->commit_sort == 2)
+			fprintf(f, "repo.commit-sort=topo\n");
+	}
+	fprintf(f, "\n");
 }
 
-void print_repolist(struct cgit_repolist *list)
+static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 {
 	int i;
 
-	for(i = 0; i < list->count; i++)
-		print_repo(&list->repos[i]);
+	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)
+{
+	struct strbuf locked_rc = STRBUF_INIT;
+	int result = 0;
+	int idx;
+	FILE *f;
+
+	strbuf_addf(&locked_rc, "%s.lock", cached_rc);
+	f = fopen(locked_rc.buf, "wx");
+	if (!f) {
+		/* Inform about the error unless the lockfile already existed,
+		 * since that only means we've got concurrent requests.
+		 */
+		result = errno;
+		if (result != EEXIST)
+			fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
+				locked_rc.buf, strerror(result), result);
+		goto out;
+	}
+	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.buf, cached_rc))
+		fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
+			locked_rc.buf, cached_rc, strerror(errno), errno);
+	fclose(f);
+out:
+	strbuf_release(&locked_rc);
+	return result;
 }
 
+static void process_cached_repolist(const char *path)
+{
+	struct stat st;
+	struct strbuf cached_rc = STRBUF_INIT;
+	time_t age;
+	unsigned long hash;
+
+	hash = hash_str(path);
+	if (ctx.cfg.project_list)
+		hash += hash_str(ctx.cfg.project_list);
+	strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
+
+	if (stat(cached_rc.buf, &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.buf)) {
+			if (ctx.cfg.project_list)
+				scan_projects(path, ctx.cfg.project_list,
+					      repo_config);
+			else
+				scan_tree(path, repo_config);
+		}
+		goto out;
+	}
+
+	parse_configfile(cached_rc.buf, 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))
+		goto out;
+
+	/* 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())
+		goto out;
+
+	exit(generate_cached_repolist(path, cached_rc.buf));
+out:
+	strbuf_release(&cached_rc);
+}
 
 static void cgit_parse_args(int argc, const char **argv)
 {
@@ -444,7 +780,7 @@ static void cgit_parse_args(int argc, const char **argv)
 
 	for (i = 1; i < argc; i++) {
 		if (!strncmp(argv[i], "--cache=", 8)) {
-			ctx.cfg.cache_root = xstrdup(argv[i]+8);
+			ctx.cfg.cache_root = xstrdup(argv[i] + 8);
 		}
 		if (!strcmp(argv[i], "--nocache")) {
 			ctx.cfg.nocache = 1;
@@ -453,34 +789,45 @@ static void cgit_parse_args(int argc, const char **argv)
 			ctx.env.no_http = "1";
 		}
 		if (!strncmp(argv[i], "--query=", 8)) {
-			ctx.qry.raw = xstrdup(argv[i]+8);
+			ctx.qry.raw = xstrdup(argv[i] + 8);
 		}
 		if (!strncmp(argv[i], "--repo=", 7)) {
-			ctx.qry.repo = xstrdup(argv[i]+7);
+			ctx.qry.repo = xstrdup(argv[i] + 7);
 		}
 		if (!strncmp(argv[i], "--page=", 7)) {
-			ctx.qry.page = xstrdup(argv[i]+7);
+			ctx.qry.page = xstrdup(argv[i] + 7);
 		}
 		if (!strncmp(argv[i], "--head=", 7)) {
-			ctx.qry.head = xstrdup(argv[i]+7);
+			ctx.qry.head = xstrdup(argv[i] + 7);
 			ctx.qry.has_symref = 1;
 		}
 		if (!strncmp(argv[i], "--sha1=", 7)) {
-			ctx.qry.sha1 = xstrdup(argv[i]+7);
+			ctx.qry.sha1 = xstrdup(argv[i] + 7);
 			ctx.qry.has_sha1 = 1;
 		}
 		if (!strncmp(argv[i], "--ofs=", 6)) {
-			ctx.qry.ofs = atoi(argv[i]+6);
+			ctx.qry.ofs = atoi(argv[i] + 6);
 		}
-		if (!strncmp(argv[i], "--scan-tree=", 12)) {
+		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);
+			scan_tree(argv[i] + 12, repo_config);
 		}
 	}
 	if (scan) {
 		qsort(cgit_repolist.repos, cgit_repolist.count,
 			sizeof(struct cgit_repo), cmp_repos);
-		print_repolist(&cgit_repolist);
+		print_repolist(stdout, &cgit_repolist, 0);
 		exit(0);
 	}
 }
@@ -505,7 +852,6 @@ static int calc_ttl()
 int main(int argc, const char **argv)
 {
 	const char *path;
-	char *qry;
 	int err, ttl;
 
 	prepare_context(&ctx);
@@ -514,15 +860,16 @@ int main(int argc, const char **argv)
 	cgit_repolist.repos = NULL;
 
 	cgit_parse_args(argc, argv);
-	parse_configfile(ctx.env.cgit_config, config_cb);
+	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.
+	 * that virtual-root equals SCRIPT_NAME, minus any possibly
+	 * trailing slashes.
 	 */
-	if (!ctx.cfg.virtual_root)
-		ctx.cfg.virtual_root = ctx.cfg.script_name;
+	if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
+		ctx.cfg.virtual_root = ensure_end(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
@@ -535,16 +882,16 @@ int main(int argc, const char **argv)
 			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);
+			char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
+			free(ctx.qry.raw);
+			ctx.qry.raw = newqry;
 		} else
-			ctx.qry.raw = ctx.qry.url;
+			ctx.qry.raw = xstrdup(ctx.qry.url);
 		cgit_parse_url(ctx.qry.url);
 	}
 
 	ttl = calc_ttl();
-	ctx.page.expires += ttl*60;
+	ctx.page.expires += ttl * 60;
 	if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 		ctx.cfg.nocache = 1;
 	if (ctx.cfg.nocache)
@@ -552,7 +899,7 @@ int main(int argc, const char **argv)
 	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));
+		cgit_print_error("Error processing page: %s (%d)",
+				 strerror(err), err);
 	return err;
 }