cgit.c - infrastructure/cgit.git - Linaro Git Browser

 /* 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"
 #include "cache.h"
 #include "cmd.h"
 #include "configfile.h"
 #include "html.h"
 #include "ui-shared.h"
 #include "scan-tree.h"

 const char *cgit_version = CGIT_VERSION;

 void config_cb(const char *name, const char *value)
 {
 	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, "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, "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, "snapshots"))
 		ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 	else if (!strcmp(name, "enable-index-links"))
 		ctx.cfg.enable_index_links = 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, "cache-size"))
 		ctx.cfg.cache_size = atoi(value);
 	else if (!strcmp(name, "cache-root"))
 		ctx.cfg.cache_root = xstrdup(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-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, "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-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, "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, "agefile"))
 		ctx.cfg.agefile = xstrdup(value);
 	else if (!strcmp(name, "renamelimit"))
 		ctx.cfg.renamelimit = 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 (!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.module-link"))
 		ctx.repo->module_link= xstrdup(value);
 	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);
 }

 static void querystring_cb(const char *name, const char *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")) {
 		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, "showmsg")) {
 		ctx.qry.showmsg = atoi(value);
 	}
 }

 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_static_ttl = -1;
 	ctx->cfg.css = "/cgit.css";
 	ctx->cfg.logo = "/git-logo.png";
 	ctx->cfg.local_time = 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.module_link = "./?repo=%s&page=commit&id=%s";
 	ctx->cfg.renamelimit = -1;
 	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.summary_branches = 10;
 	ctx->cfg.summary_log = 10;
 	ctx->cfg.summary_tags = 10;
 	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;
 }

 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 prepare_repo_cmd(struct cgit_context *ctx)
 {
 	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;
 	}
 	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 1;
 	}

 	if (get_sha1(ctx->qry.head, sha1)) {
 		tmp = xstrdup(ctx->qry.head);
 		ctx->qry.head = ctx->repo->defbranch;
 		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 process_request(void *cbdata)
 {
 	struct cgit_context *ctx = cbdata;
 	struct cgit_cmd *cmd;

 	cmd = cgit_get_cmd(ctx);
 	if (!cmd) {
 		ctx->page.title = "cgit error";
 		ctx->repo = NULL;
 		cgit_print_http_headers(ctx);
 		cgit_print_docstart(ctx);
 		cgit_print_pageheader(ctx);
 		cgit_print_error("Invalid request");
 		cgit_print_docend();
 		return;
 	}

 	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();
 }

 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)
 {
 	printf("repo.url=%s\n", repo->url);
 	printf("repo.name=%s\n", repo->name);
 	printf("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);
 	if (repo->readme)
 		printf("repo.readme=%s\n", repo->readme);
 	printf("\n");
 }

 void print_repolist(struct cgit_repolist *list)
 {
 	int i;

 	for(i = 0; i < list->count; i++)
 		print_repo(&list->repos[i]);
 }


 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)) {
 			ctx.cfg.cache_root = xstrdup(argv[i]+8);
 		}
 		if (!strcmp(argv[i], "--nocache")) {
 			ctx.cfg.nocache = 1;
 		}
 		if (!strncmp(argv[i], "--query=", 8)) {
 			ctx.qry.raw = xstrdup(argv[i]+8);
 		}
 		if (!strncmp(argv[i], "--repo=", 7)) {
 			ctx.qry.repo = xstrdup(argv[i]+7);
 		}
 		if (!strncmp(argv[i], "--page=", 7)) {
 			ctx.qry.page = xstrdup(argv[i]+7);
 		}
 		if (!strncmp(argv[i], "--head=", 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.has_sha1 = 1;
 		}
 		if (!strncmp(argv[i], "--ofs=", 6)) {
 			ctx.qry.ofs = atoi(argv[i]+6);
 		}
 		if (!strncmp(argv[i], "--scan-tree=", 12)) {
 			scan++;
 			scan_tree(argv[i] + 12);
 		}
 	}
 	if (scan) {
 		qsort(cgit_repolist.repos, cgit_repolist.count,
 			sizeof(struct cgit_repo), cmp_repos);
 		print_repolist(&cgit_repolist);
 		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)
 {
 	const char *cgit_config_env = getenv("CGIT_CONFIG");
 	const char *path;
 	char *qry;
 	int err, ttl;

 	prepare_context(&ctx);
 	cgit_repolist.length = 0;
 	cgit_repolist.count = 0;
 	cgit_repolist.repos = NULL;

 	if (getenv("SCRIPT_NAME"))
 		ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
 	if (getenv("QUERY_STRING"))
 		ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
 	cgit_parse_args(argc, argv);
 	parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
 			 config_cb);
 	ctx.repo = NULL;
 	http_parse_querystring(ctx.qry.raw, querystring_cb);

 	/* If virtual-root isn't specified in cgitrc and no url
 	 * parameter is specified on the querystring, lets pretend
 	 * that virtualroot equals SCRIPT_NAME and 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).
 	 */
 	if (!ctx.cfg.virtual_root && !ctx.qry.url) {
 		ctx.cfg.virtual_root = ctx.cfg.script_name;
 		path = getenv("PATH_INFO");
 		if (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 = ctx.qry.url;
 			cgit_parse_url(ctx.qry.url);
 		}
 	}

 	ttl = calc_ttl();
 	ctx.page.expires += ttl*60;
 	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;
 }
	/* 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"
	#include "cache.h"
	#include "cmd.h"
	#include "configfile.h"
	#include "html.h"
	#include "ui-shared.h"
	#include "scan-tree.h"

	const char *cgit_version = CGIT_VERSION;

	void config_cb(const char name, const char value)
	{
	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, "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, "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, "snapshots"))
	ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
	else if (!strcmp(name, "enable-index-links"))
	ctx.cfg.enable_index_links = 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, "cache-size"))
	ctx.cfg.cache_size = atoi(value);
	else if (!strcmp(name, "cache-root"))
	ctx.cfg.cache_root = xstrdup(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-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, "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-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, "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, "agefile"))
	ctx.cfg.agefile = xstrdup(value);
	else if (!strcmp(name, "renamelimit"))
	ctx.cfg.renamelimit = 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 (!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.module-link"))
	ctx.repo->module_link= xstrdup(value);
	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);
	}

	static void querystring_cb(const char name, const char 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")) {
	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, "showmsg")) {
	ctx.qry.showmsg = atoi(value);
	}
	}

	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_static_ttl = -1;
	ctx->cfg.css = "/cgit.css";
	ctx->cfg.logo = "/git-logo.png";
	ctx->cfg.local_time = 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.module_link = "./?repo=%s&page=commit&id=%s";
	ctx->cfg.renamelimit = -1;
	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.summary_branches = 10;
	ctx->cfg.summary_log = 10;
	ctx->cfg.summary_tags = 10;
	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;
	}

	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 prepare_repo_cmd(struct cgit_context *ctx)
	{
	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;
	}
	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 1;
	}

	if (get_sha1(ctx->qry.head, sha1)) {
	tmp = xstrdup(ctx->qry.head);
	ctx->qry.head = ctx->repo->defbranch;
	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 process_request(void *cbdata)
	{
	struct cgit_context *ctx = cbdata;
	struct cgit_cmd *cmd;

	cmd = cgit_get_cmd(ctx);
	if (!cmd) {
	ctx->page.title = "cgit error";
	ctx->repo = NULL;
	cgit_print_http_headers(ctx);
	cgit_print_docstart(ctx);
	cgit_print_pageheader(ctx);
	cgit_print_error("Invalid request");
	cgit_print_docend();
	return;
	}

	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();
	}

	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)
	{
	printf("repo.url=%s\n", repo->url);
	printf("repo.name=%s\n", repo->name);
	printf("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);
	if (repo->readme)
	printf("repo.readme=%s\n", repo->readme);
	printf("\n");
	}

	void print_repolist(struct cgit_repolist *list)
	{
	int i;

	for(i = 0; i < list->count; i++)
	print_repo(&list->repos[i]);
	}


	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)) {
	ctx.cfg.cache_root = xstrdup(argv[i]+8);
	}
	if (!strcmp(argv[i], "--nocache")) {
	ctx.cfg.nocache = 1;
	}
	if (!strncmp(argv[i], "--query=", 8)) {
	ctx.qry.raw = xstrdup(argv[i]+8);
	}
	if (!strncmp(argv[i], "--repo=", 7)) {
	ctx.qry.repo = xstrdup(argv[i]+7);
	}
	if (!strncmp(argv[i], "--page=", 7)) {
	ctx.qry.page = xstrdup(argv[i]+7);
	}
	if (!strncmp(argv[i], "--head=", 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.has_sha1 = 1;
	}
	if (!strncmp(argv[i], "--ofs=", 6)) {
	ctx.qry.ofs = atoi(argv[i]+6);
	}
	if (!strncmp(argv[i], "--scan-tree=", 12)) {
	scan++;
	scan_tree(argv[i] + 12);
	}
	}
	if (scan) {
	qsort(cgit_repolist.repos, cgit_repolist.count,
	sizeof(struct cgit_repo), cmp_repos);
	print_repolist(&cgit_repolist);
	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)
	{
	const char *cgit_config_env = getenv("CGIT_CONFIG");
	const char *path;
	char *qry;
	int err, ttl;

	prepare_context(&ctx);
	cgit_repolist.length = 0;
	cgit_repolist.count = 0;
	cgit_repolist.repos = NULL;

	if (getenv("SCRIPT_NAME"))
	ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
	if (getenv("QUERY_STRING"))
	ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
	cgit_parse_args(argc, argv);
	parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
	config_cb);
	ctx.repo = NULL;
	http_parse_querystring(ctx.qry.raw, querystring_cb);

	/* If virtual-root isn't specified in cgitrc and no url
	* parameter is specified on the querystring, lets pretend
	* that virtualroot equals SCRIPT_NAME and 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).
	*/
	if (!ctx.cfg.virtual_root && !ctx.qry.url) {
	ctx.cfg.virtual_root = ctx.cfg.script_name;
	path = getenv("PATH_INFO");
	if (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 = ctx.qry.url;
	cgit_parse_url(ctx.qry.url);
	}
	}

	ttl = calc_ttl();
	ctx.page.expires += ttl*60;
	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;
	}