/* 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) */ #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; 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);} 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);	args_size = (2 + extra_args) * sizeof(char *);	f->argv = xmalloc(args_size);	memset(f->argv, 0, args_size);	f->argv[0] = f->cmd;	return f;} static void process_cached_repolist(const char *path); void repo_config(struct cgit_repo *repo, const char *name, const char *value){	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, "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);	}} 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-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-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(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, ABOUT);	else if (!strcmp(name, "commit-filter"))		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, 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 (!strcmp(name, "commit-sort")) {		if (!strcmp(value, "date"))			ctx.cfg.commit_sort = 1;		if (!strcmp(value, "topo"))			ctx.cfg.commit_sort = 2;	} 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);		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));	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.case_sensitive_sort = 1;	ctx->cfg.css = "/cgit.css";	ctx->cfg.logo = "/cgit.png";	ctx->cfg.local_time = 0;	ctx->cfg.enable_http_clone = 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.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->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 char *guess_defbranch(const char *repo_path){	const char *ref;	unsigned char sha1[20]; 	ref = resolve_ref("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; 	setenv("GIT_DIR", ctx->repo->path, 1);	setup_git_directory_gently(&nongit);	if (nongit) {		rc = errno;		ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,				      "config error");		tmp = fmt("Failed to open %s: %s",			  ctx->repo->name,			  rc ? strerror(rc) : "Not a valid git repository");		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->repo->defbranch)		ctx->repo->defbranch = guess_defbranch(ctx->repo->path); 	if (!ctx->qry.head) {		ctx->qry.nohead = 1;		ctx->qry.head = find_default_branch(ctx->repo);	} 	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);

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