ui-stats: replace 'enable-stats' setting with 'max-stats'

The new 'max-stats' and 'repo.max-stats' settings makes it possible to
define the maximum statistics period, both globally and per repo. Hence,
it is now feasible to allow statistics on repositories with a high commit
frequency, like linux-2.6, by setting repo.max-stats to e.g. 'month'.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

8 files changed, 104 insertions, 58 deletions

diff --git a/cgit.c b/cgit.c
index 22b6d7c..57e11cd 100644
--- a/cgit.c
+++ b/cgit.c
@@ -1,377 +1,379 @@
 /* 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 "ui-stats.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, "enable-stats"))
-		ctx.cfg.enable_stats = 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);
 	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.enable-stats"))
-		ctx.repo->enable_stats = ctx.cfg.enable_stats && 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.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, "period")) {
 		ctx.qry.period = xstrdup(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.max_stats = 0;
 	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);
 		}
diff --git a/cgit.h b/cgit.h
index 85045c4..f2cb671 100644
--- a/cgit.h
+++ b/cgit.h
@@ -1,246 +1,246 @@
 #ifndef CGIT_H
 #define CGIT_H
 
 
 #include <git-compat-util.h>
 #include <cache.h>
 #include <grep.h>
 #include <object.h>
 #include <tree.h>
 #include <commit.h>
 #include <tag.h>
 #include <diff.h>
 #include <diffcore.h>
 #include <refs.h>
 #include <revision.h>
 #include <log-tree.h>
 #include <archive.h>
 #include <xdiff/xdiff.h>
 #include <utf8.h>
 
 
 /*
  * Dateformats used on misc. pages
  */
 #define FMT_LONGDATE "%Y-%m-%d %H:%M:%S (%Z)"
 #define FMT_SHORTDATE "%Y-%m-%d"
 #define FMT_ATOMDATE "%Y-%m-%dT%H:%M:%SZ"
 
 
 /*
  * Limits used for relative dates
  */
 #define TM_MIN    60
 #define TM_HOUR  (TM_MIN * 60)
 #define TM_DAY   (TM_HOUR * 24)
 #define TM_WEEK  (TM_DAY * 7)
 #define TM_YEAR  (TM_DAY * 365)
 #define TM_MONTH (TM_YEAR / 12.0)
 
 
 /*
  * Default encoding
  */
 #define PAGE_ENCODING "UTF-8"
 
 typedef void (*configfn)(const char *name, const char *value);
 typedef void (*filepair_fn)(struct diff_filepair *pair);
 typedef void (*linediff_fn)(char *line, int len);
 
 struct cgit_repo {
 	char *url;
 	char *name;
 	char *path;
 	char *desc;
 	char *owner;
 	char *defbranch;
 	char *group;
 	char *module_link;
 	char *readme;
 	char *clone_url;
 	int snapshots;
 	int enable_log_filecount;
 	int enable_log_linecount;
-	int enable_stats;
+	int max_stats;
 };
 
 struct cgit_repolist {
 	int length;
 	int count;
 	struct cgit_repo *repos;
 };
 
 struct commitinfo {
 	struct commit *commit;
 	char *author;
 	char *author_email;
 	unsigned long author_date;
 	char *committer;
 	char *committer_email;
 	unsigned long committer_date;
 	char *subject;
 	char *msg;
 	char *msg_encoding;
 };
 
 struct taginfo {
 	char *tagger;
 	char *tagger_email;
 	unsigned long tagger_date;
 	char *msg;
 };
 
 struct refinfo {
 	const char *refname;
 	struct object *object;
 	union {
 		struct taginfo *tag;
 		struct commitinfo *commit;
 	};
 };
 
 struct reflist {
 	struct refinfo **refs;
 	int alloc;
 	int count;
 };
 
 struct cgit_query {
 	int has_symref;
 	int has_sha1;
 	char *raw;
 	char *repo;
 	char *page;
 	char *search;
 	char *grep;
 	char *head;
 	char *sha1;
 	char *sha2;
 	char *path;
 	char *name;
 	char *mimetype;
 	char *url;
 	char *period;
 	int   ofs;
 	int nohead;
 };
 
 struct cgit_config {
 	char *agefile;
 	char *cache_root;
 	char *clone_prefix;
 	char *css;
 	char *favicon;
 	char *footer;
 	char *index_header;
 	char *index_info;
 	char *logo;
 	char *logo_link;
 	char *module_link;
 	char *repo_group;
 	char *robots;
 	char *root_title;
 	char *root_desc;
 	char *root_readme;
 	char *script_name;
 	char *virtual_root;
 	int cache_size;
 	int cache_dynamic_ttl;
 	int cache_max_create_time;
 	int cache_repo_ttl;
 	int cache_root_ttl;
 	int cache_static_ttl;
 	int enable_index_links;
 	int enable_log_filecount;
 	int enable_log_linecount;
-	int enable_stats;
 	int local_time;
 	int max_repo_count;
 	int max_commit_count;
 	int max_lock_attempts;
 	int max_msg_len;
 	int max_repodesc_len;
+	int max_stats;
 	int nocache;
 	int renamelimit;
 	int snapshots;
 	int summary_branches;
 	int summary_log;
 	int summary_tags;
 };
 
 struct cgit_page {
 	time_t modified;
 	time_t expires;
 	size_t size;
 	char *mimetype;
 	char *charset;
 	char *filename;
 	char *title;
 };
 
 struct cgit_context {
 	struct cgit_query qry;
 	struct cgit_config cfg;
 	struct cgit_repo *repo;
 	struct cgit_page page;
 };
 
 struct cgit_snapshot_format {
 	const char *suffix;
 	const char *mimetype;
 	write_archive_fn_t write_func;
 	int bit;
 };
 
 extern const char *cgit_version;
 
 extern struct cgit_repolist cgit_repolist;
 extern struct cgit_context ctx;
 extern const struct cgit_snapshot_format cgit_snapshot_formats[];
 
 extern struct cgit_repo *cgit_add_repo(const char *url);
 extern struct cgit_repo *cgit_get_repoinfo(const char *url);
 extern void cgit_repo_config_cb(const char *name, const char *value);
 
 extern int chk_zero(int result, char *msg);
 extern int chk_positive(int result, char *msg);
 extern int chk_non_negative(int result, char *msg);
 
 extern char *trim_end(const char *str, char c);
 extern char *strlpart(char *txt, int maxlen);
 extern char *strrpart(char *txt, int maxlen);
 
 extern void cgit_add_ref(struct reflist *list, struct refinfo *ref);
 extern int cgit_refs_cb(const char *refname, const unsigned char *sha1,
 			int flags, void *cb_data);
 
 extern void *cgit_free_commitinfo(struct commitinfo *info);
 
 extern int cgit_diff_files(const unsigned char *old_sha1,
 			   const unsigned char *new_sha1,
 			   linediff_fn fn);
 
 extern void cgit_diff_tree(const unsigned char *old_sha1,
 			   const unsigned char *new_sha1,
 			   filepair_fn fn, const char *prefix);
 
 extern void cgit_diff_commit(struct commit *commit, filepair_fn fn);
 
 extern char *fmt(const char *format,...);
 
 extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 extern struct taginfo *cgit_parse_tag(struct tag *tag);
 extern void cgit_parse_url(const char *url);
 
 extern const char *cgit_repobasename(const char *reponame);
 
 extern int cgit_parse_snapshots_mask(const char *str);
 
 /* libgit.a either links against or compiles its own implementation of
  * strcasestr(), and we'd like to reuse it. Simply re-declaring it
  * seems to do the trick.
  */
 extern char *strcasestr(const char *haystack, const char *needle);
 
 
 #endif /* CGIT_H */
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 60d3ea4..0bbbea3 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -1,375 +1,384 @@
 CGITRC
 ======
 
 
 NAME
 ----
 	cgitrc - runtime configuration for cgit
 
 
 DESCRIPTION
 -----------
 Cgitrc contains all runtime settings for cgit, including the list of git
 repositories, formatted as a line-separated list of NAME=VALUE pairs. Blank
 lines, and lines starting with '#', are ignored.
 
 
 GLOBAL SETTINGS
 ---------------
 agefile
 	Specifies a path, relative to each repository path, which can be used
 	to specify the date and time of the youngest commit in the repository.
 	The first line in the file is used as input to the "parse_date"
 	function in libgit. Recommended timestamp-format is "yyyy-mm-dd
 	hh:mm:ss". Default value: "info/web/last-modified".
 
 cache-root
 	Path used to store the cgit cache entries. Default value:
 	"/var/cache/cgit".
 
 cache-dynamic-ttl
 	Number which specifies the time-to-live, in minutes, for the cached
 	version of repository pages accessed without a fixed SHA1. Default
 	value: "5".
 
 cache-repo-ttl
 	Number which specifies the time-to-live, in minutes, for the cached
 	version of the repository summary page. Default value: "5".
 
 cache-root-ttl
 	Number which specifies the time-to-live, in minutes, for the cached
 	version of the repository index page. Default value: "5".
 
 cache-size
 	The maximum number of entries in the cgit cache. Default value: "0"
 	(i.e. caching is disabled).
 
 cache-static-ttl
 	Number which specifies the time-to-live, in minutes, for the cached
 	version of repository pages accessed with a fixed SHA1. Default value:
 	"5".
 
 clone-prefix
 	Space-separated list of common prefixes which, when combined with a
 	repository url, generates valid clone urls for the repository. This
 	setting is only used if `repo.clone-url` is unspecified. Default value:
 	none.
 
 css
 	Url which specifies the css document to include in all cgit pages.
 	Default value: "/cgit.css".
 
 enable-index-links
 	Flag which, when set to "1", will make cgit generate extra links for
 	each repo in the repository index (specifically, to the "summary",
 	"commit" and "tree" pages). Default value: "0".
 
 enable-log-filecount
 	Flag which, when set to "1", will make cgit print the number of
 	modified files for each commit on the repository log page. Default
 	value: "0".
 
 enable-log-linecount
 	Flag which, when set to "1", will make cgit print the number of added
 	and removed lines for each commit on the repository log page. Default
 	value: "0".
 
-enable-stats
-	Globally enable/disable statistics for each repository. Default
-	value: "0".
-
 favicon
 	Url used as link to a shortcut icon for cgit. If specified, it is
 	suggested to use the value "/favicon.ico" since certain browsers will
 	ignore other values. Default value: none.
 
 footer
 	The content of the file specified with this option will be included
 	verbatim at the bottom of all pages (i.e. it replaces the standard
 	"generated by..." message. Default value: none.
 
 include
 	Name of a configfile to include before the rest of the current config-
 	file is parsed. Default value: none.
 
 index-header
 	The content of the file specified with this option will be included
 	verbatim above the repository index. This setting is deprecated, and
 	will not be supported by cgit-1.0 (use root-readme instead). Default
 	value: none.
 
 index-info
 	The content of the file specified with this option will be included
 	verbatim below the heading on the repository index page. This setting
 	is deprecated, and will not be supported by cgit-1.0 (use root-desc
 	instead). Default value: none.
 
 local-time
 	Flag which, if set to "1", makes cgit print commit and tag times in the
 	servers timezone. Default value: "0".
 
 logo
 	Url which specifies the source of an image which will be used as a logo
 	on all cgit pages.
 
 logo-link
 	Url loaded when clicking on the cgit logo image. If unspecified the
 	calculated url of the repository index page will be used. Default
 	value: none.
 
 max-commit-count
 	Specifies the number of entries to list per page in "log" view. Default
 	value: "50".
 
 max-message-length
 	Specifies the maximum number of commit message characters to display in
 	"log" view. Default value: "80".
 
 max-repo-count
 	Specifies the number of entries to list per page on the	repository
 	index page. Default value: "50".
 
 max-repodesc-length
 	Specifies the maximum number of repo description characters to display
 	on the repository index page. Default value: "80".
 
+max-stats
+	Set the default maximum statistics period. Valid values are "week",
+	"month", "quarter" and "year". If unspecified, statistics are
+	disabled. Default value: none. See also: "repo.max-stats".
+
 module-link
 	Text which will be used as the formatstring for a hyperlink when a
 	submodule is printed in a directory listing. The arguments for the
 	formatstring are the path and SHA1 of the submodule commit. Default
 	value: "./?repo=%s&page=commit&id=%s"
 
 nocache
 	If set to the value "1" caching will be disabled. This settings is
 	deprecated, and will not be honored starting with cgit-1.0. Default
 	value: "0".
 
 renamelimit
 	Maximum number of files to consider when detecting renames. The value
 	 "-1" uses the compiletime value in git (for further info, look at
 	  `man git-diff`). Default value: "-1".
 
 repo.group
 	A value for the current repository group, which all repositories
 	specified after this setting will inherit. Default value: none.
 
 robots
 	Text used as content for the "robots" meta-tag. Default value:
 	"index, nofollow".
 
 root-desc
 	Text printed below the heading on the repository index page. Default
 	value: "a fast webinterface for the git dscm".
 
 root-readme:
 	The content of the file specified with this option will be included
 	verbatim below the "about" link on the repository index page. Default
 	value: none.
 
 root-title
 	Text printed as heading on the repository index page. Default value:
 	"Git Repository Browser".
 
 snapshots
 	Text which specifies the default (and allowed) set of snapshot formats
 	supported by cgit. The value is a space-separated list of zero or more
 	of the following values:
 		"tar"		uncompressed tar-file
 		"tar.gz"	gzip-compressed tar-file
 		"tar.bz2"	bzip-compressed tar-file
 		"zip"		zip-file
 	Default value: none.
 
 summary-branches
 	Specifies the number of branches to display in the repository "summary"
 	view. Default value: "10".
 
 summary-log
 	Specifies the number of log entries to display in the repository
 	"summary" view. Default value: "10".
 
 summary-tags
 	Specifies the number of tags to display in the repository "summary"
 	view. Default value: "10".
 
 virtual-root
 	Url which, if specified, will be used as root for all cgit links. It
 	will also cause cgit to generate 'virtual urls', i.e. urls like
 	'/cgit/tree/README' as opposed to '?r=cgit&p=tree&path=README'. Default
 	value: none.
 	NOTE: cgit has recently learned how to use PATH_INFO to achieve the
 	same kind of virtual urls, so this option will probably be deprecated.
 
 REPOSITORY SETTINGS
 -------------------
 repo.clone-url
 	A list of space-separated urls which can be used to clone this repo.
 	Default value: none.
 
 repo.defbranch
 	The name of the default branch for this repository. If no such branch
 	exists in the repository, the first branch name (when sorted) is used
 	as default instead. Default value: "master".
 
 repo.desc
 	The value to show as repository description. Default value: none.
 
 repo.enable-log-filecount
 	A flag which can be used to disable the global setting
 	`enable-log-filecount'. Default value: none.
 
 repo.enable-log-linecount
 	A flag which can be used to disable the global setting
 	`enable-log-linecount'. Default value: none.
 
-repo.enable-stats
-	A flag which can be used to disable the global setting
-	`enable-stats'. Default value: none.
+repo.max-stats
+	Override the default maximum statistics period. Valid values are equal
+	to the values specified for the global "max-stats" setting. Default
+	value: none.
 
 repo.name
 	The value to show as repository name. Default value: <repo.url>.
 
 repo.owner
 	A value used to identify the owner of the repository. Default value:
 	none.
 
 repo.path
 	An absolute path to the repository directory. For non-bare repositories
 	this is the .git-directory. Default value: none.
 
 repo.readme
 	A path (relative to <repo.path>) which specifies a file to include
 	verbatim as the "About" page for this repo. Default value: none.
 
 repo.snapshots
 	A mask of allowed snapshot-formats for this repo, restricted by the
 	"snapshots" global setting. Default value: <snapshots>.
 
 repo.url
 	The relative url used to access the repository. This must be the first
 	setting specified for each repo. Default value: none.
 
 
 EXAMPLE CGITRC FILE
 -------------------
 
 # Enable caching of up to 1000 output entriess
 cache-size=1000
 
 
 # Specify some default clone prefixes
 clone-prefix=git://foobar.com ssh://foobar.com/pub/git http://foobar.com/git
 
 # Specify the css url
 css=/css/cgit.css
 
 
 # Show extra links for each repository on the index page
 enable-index-links=1
 
 
 # Show number of affected files per commit on the log pages
 enable-log-filecount=1
 
 
 # Show number of added/removed lines per commit on the log pages
 enable-log-linecount=1
 
 
 # Add a cgit favicon
 favicon=/favicon.ico
 
 
 # Use a custom logo
 logo=/img/mylogo.png
 
 
+# Enable statistics per week, month and quarter
+max-stats=quarter
+
+
 # Set the title and heading of the repository index page
 root-title=foobar.com git repositories
 
 
 # Set a subheading for the repository index page
 root-desc=tracking the foobar development
 
 
 # Include some more info about foobar.com on the index page
 root-readme=/var/www/htdocs/about.html
 
 
 # Allow download of tar.gz, tar.bz and zip-files
 snapshots=tar.gz tar.bz zip
 
 
 ##
 ## List of repositories.
 ## PS: Any repositories listed when repo.group is unset will not be
 ##     displayed under a group heading
 ## PPS: This list could be kept in a different file (e.g. '/etc/cgitrepos')
 ##      and included like this:
 ##        include=/etc/cgitrepos
 ##
 
 
 repo.url=foo
 repo.path=/pub/git/foo.git
 repo.desc=the master foo repository
 repo.owner=fooman@foobar.com
 repo.readme=info/web/about.html
 
 
 repo.url=bar
 repo.path=/pub/git/bar.git
 repo.desc=the bars for your foo
 repo.owner=barman@foobar.com
 repo.readme=info/web/about.html
 
 
 # The next repositories will be displayed under the 'extras' heading
 repo.group=extras
 
 
 repo.url=baz
 repo.path=/pub/git/baz.git
 repo.desc=a set of extensions for bar users
 
 repo.url=wiz
 repo.path=/pub/git/wiz.git
 repo.desc=the wizard of foo
 
 
 # Add some mirrored repositories
 repo.group=mirrors
 
 
 repo.url=git
 repo.path=/pub/git/git.git
 repo.desc=the dscm
 
 
 repo.url=linux
 repo.path=/pub/git/linux.git
 repo.desc=the kernel
 
 # Disable adhoc downloads of this repo
 repo.snapshots=0
 
 # Disable line-counts for this repo
 repo.enable-log-linecount=0
 
+# Restrict the max statistics period for this repo
+repo.max-stats=month
+
 
 BUGS
 ----
 Comments currently cannot appear on the same line as a setting; the comment
 will be included as part of the value. E.g. this line:
 
 	robots=index  # allow indexing
 
 will generate the following html element:
 
 	<meta name='robots' content='index  # allow indexing'/>
 
 
 
 AUTHOR
 ------
 Lars Hjemli <hjemli@gmail.com>
diff --git a/cmd.c b/cmd.c
index 744bf84..763a558 100644
--- a/cmd.c
+++ b/cmd.c
@@ -1,175 +1,172 @@
 /* cmd.c: the cgit command dispatcher
  *
  * Copyright (C) 2008 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 #include "cmd.h"
 #include "cache.h"
 #include "ui-shared.h"
 #include "ui-atom.h"
 #include "ui-blob.h"
 #include "ui-clone.h"
 #include "ui-commit.h"
 #include "ui-diff.h"
 #include "ui-log.h"
 #include "ui-patch.h"
 #include "ui-plain.h"
 #include "ui-refs.h"
 #include "ui-repolist.h"
 #include "ui-snapshot.h"
 #include "ui-stats.h"
 #include "ui-summary.h"
 #include "ui-tag.h"
 #include "ui-tree.h"
 
 static void HEAD_fn(struct cgit_context *ctx)
 {
 	cgit_clone_head(ctx);
 }
 
 static void atom_fn(struct cgit_context *ctx)
 {
 	cgit_print_atom(ctx->qry.head, ctx->qry.path, 10);
 }
 
 static void about_fn(struct cgit_context *ctx)
 {
 	if (ctx->repo)
 		cgit_print_repo_readme();
 	else
 		cgit_print_site_readme();
 }
 
 static void blob_fn(struct cgit_context *ctx)
 {
 	cgit_print_blob(ctx->qry.sha1, ctx->qry.path, ctx->qry.head);
 }
 
 static void commit_fn(struct cgit_context *ctx)
 {
 	cgit_print_commit(ctx->qry.sha1);
 }
 
 static void diff_fn(struct cgit_context *ctx)
 {
 	cgit_print_diff(ctx->qry.sha1, ctx->qry.sha2, ctx->qry.path);
 }
 
 static void info_fn(struct cgit_context *ctx)
 {
 	cgit_clone_info(ctx);
 }
 
 static void log_fn(struct cgit_context *ctx)
 {
 	cgit_print_log(ctx->qry.sha1, ctx->qry.ofs, ctx->cfg.max_commit_count,
 		       ctx->qry.grep, ctx->qry.search, ctx->qry.path, 1);
 }
 
 static void ls_cache_fn(struct cgit_context *ctx)
 {
 	ctx->page.mimetype = "text/plain";
 	ctx->page.filename = "ls-cache.txt";
 	cgit_print_http_headers(ctx);
 	cache_ls(ctx->cfg.cache_root);
 }
 
 static void objects_fn(struct cgit_context *ctx)
 {
 	cgit_clone_objects(ctx);
 }
 
 static void repolist_fn(struct cgit_context *ctx)
 {
 	cgit_print_repolist();
 }
 
 static void patch_fn(struct cgit_context *ctx)
 {
 	cgit_print_patch(ctx->qry.sha1);
 }
 
 static void plain_fn(struct cgit_context *ctx)
 {
 	cgit_print_plain(ctx);
 }
 
 static void refs_fn(struct cgit_context *ctx)
 {
 	cgit_print_refs();
 }
 
 static void snapshot_fn(struct cgit_context *ctx)
 {
 	cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1,
 			    cgit_repobasename(ctx->repo->url), ctx->qry.path,
 			    ctx->repo->snapshots, ctx->qry.nohead);
 }
 
 static void stats_fn(struct cgit_context *ctx)
 {
-	if (ctx->repo->enable_stats)
-		cgit_show_stats(ctx);
-	else
-		cgit_print_error("Stats disabled for this repo");
+	cgit_show_stats(ctx);
 }
 
 static void summary_fn(struct cgit_context *ctx)
 {
 	cgit_print_summary();
 }
 
 static void tag_fn(struct cgit_context *ctx)
 {
 	cgit_print_tag(ctx->qry.sha1);
 }
 
 static void tree_fn(struct cgit_context *ctx)
 {
 	cgit_print_tree(ctx->qry.sha1, ctx->qry.path);
 }
 
 #define def_cmd(name, want_repo, want_layout) \
 	{#name, name##_fn, want_repo, want_layout}
 
 struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx)
 {
 	static struct cgit_cmd cmds[] = {
 		def_cmd(HEAD, 1, 0),
 		def_cmd(atom, 1, 0),
 		def_cmd(about, 0, 1),
 		def_cmd(blob, 1, 0),
 		def_cmd(commit, 1, 1),
 		def_cmd(diff, 1, 1),
 		def_cmd(info, 1, 0),
 		def_cmd(log, 1, 1),
 		def_cmd(ls_cache, 0, 0),
 		def_cmd(objects, 1, 0),
 		def_cmd(patch, 1, 0),
 		def_cmd(plain, 1, 0),
 		def_cmd(refs, 1, 1),
 		def_cmd(repolist, 0, 0),
 		def_cmd(snapshot, 1, 0),
 		def_cmd(stats, 1, 1),
 		def_cmd(summary, 1, 1),
 		def_cmd(tag, 1, 1),
 		def_cmd(tree, 1, 1),
 	};
 	int i;
 
 	if (ctx->qry.page == NULL) {
 		if (ctx->repo)
 			ctx->qry.page = "summary";
 		else
 			ctx->qry.page = "repolist";
 	}
 
 	for(i = 0; i < sizeof(cmds)/sizeof(*cmds); i++)
 		if (!strcmp(ctx->qry.page, cmds[i].name))
 			return &cmds[i];
 	return NULL;
 }
diff --git a/shared.c b/shared.c
index 37333f0..7382609 100644
--- a/shared.c
+++ b/shared.c
@@ -1,253 +1,253 @@
 /* shared.c: global vars + some callback functions
  *
  * Copyright (C) 2006 Lars Hjemli
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  */
 
 #include "cgit.h"
 
 struct cgit_repolist cgit_repolist;
 struct cgit_context ctx;
 int cgit_cmd;
 
 int chk_zero(int result, char *msg)
 {
 	if (result != 0)
 		die("%s: %s", msg, strerror(errno));
 	return result;
 }
 
 int chk_positive(int result, char *msg)
 {
 	if (result <= 0)
 		die("%s: %s", msg, strerror(errno));
 	return result;
 }
 
 int chk_non_negative(int result, char *msg)
 {
     	if (result < 0)
 	    	die("%s: %s",msg, strerror(errno));
 	return result;
 }
 
 struct cgit_repo *cgit_add_repo(const char *url)
 {
 	struct cgit_repo *ret;
 
 	if (++cgit_repolist.count > cgit_repolist.length) {
 		if (cgit_repolist.length == 0)
 			cgit_repolist.length = 8;
 		else
 			cgit_repolist.length *= 2;
 		cgit_repolist.repos = xrealloc(cgit_repolist.repos,
 					       cgit_repolist.length *
 					       sizeof(struct cgit_repo));
 	}
 
 	ret = &cgit_repolist.repos[cgit_repolist.count-1];
 	ret->url = trim_end(url, '/');
 	ret->name = ret->url;
 	ret->path = NULL;
 	ret->desc = "[no description]";
 	ret->owner = NULL;
 	ret->group = ctx.cfg.repo_group;
 	ret->defbranch = "master";
 	ret->snapshots = ctx.cfg.snapshots;
 	ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
 	ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
-	ret->enable_stats = ctx.cfg.enable_stats;
+	ret->max_stats = ctx.cfg.max_stats;
 	ret->module_link = ctx.cfg.module_link;
 	ret->readme = NULL;
 	return ret;
 }
 
 struct cgit_repo *cgit_get_repoinfo(const char *url)
 {
 	int i;
 	struct cgit_repo *repo;
 
 	for (i=0; i<cgit_repolist.count; i++) {
 		repo = &cgit_repolist.repos[i];
 		if (!strcmp(repo->url, url))
 			return repo;
 	}
 	return NULL;
 }
 
 void *cgit_free_commitinfo(struct commitinfo *info)
 {
 	free(info->author);
 	free(info->author_email);
 	free(info->committer);
 	free(info->committer_email);
 	free(info->subject);
 	free(info->msg);
 	free(info->msg_encoding);
 	free(info);
 	return NULL;
 }
 
 char *trim_end(const char *str, char c)
 {
 	int len;
 	char *s, *t;
 
 	if (str == NULL)
 		return NULL;
 	t = (char *)str;
 	len = strlen(t);
 	while(len > 0 && t[len - 1] == c)
 		len--;
 
 	if (len == 0)
 		return NULL;
 
 	c = t[len];
 	t[len] = '\0';
 	s = xstrdup(t);
 	t[len] = c;
 	return s;
 }
 
 char *strlpart(char *txt, int maxlen)
 {
 	char *result;
 
 	if (!txt)
 		return txt;
 
 	if (strlen(txt) <= maxlen)
 		return txt;
 	result = xmalloc(maxlen + 1);
 	memcpy(result, txt, maxlen - 3);
 	result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
 	result[maxlen] = '\0';
 	return result;
 }
 
 char *strrpart(char *txt, int maxlen)
 {
 	char *result;
 
 	if (!txt)
 		return txt;
 
 	if (strlen(txt) <= maxlen)
 		return txt;
 	result = xmalloc(maxlen + 1);
 	memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
 	result[0] = result[1] = result[2] = '.';
 	return result;
 }
 
 void cgit_add_ref(struct reflist *list, struct refinfo *ref)
 {
 	size_t size;
 
 	if (list->count >= list->alloc) {
 		list->alloc += (list->alloc ? list->alloc : 4);
 		size = list->alloc * sizeof(struct refinfo *);
 		list->refs = xrealloc(list->refs, size);
 	}
 	list->refs[list->count++] = ref;
 }
 
 struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
 {
 	struct refinfo *ref;
 
 	ref = xmalloc(sizeof (struct refinfo));
 	ref->refname = xstrdup(refname);
 	ref->object = parse_object(sha1);
 	switch (ref->object->type) {
 	case OBJ_TAG:
 		ref->tag = cgit_parse_tag((struct tag *)ref->object);
 		break;
 	case OBJ_COMMIT:
 		ref->commit = cgit_parse_commit((struct commit *)ref->object);
 		break;
 	}
 	return ref;
 }
 
 int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
 		  void *cb_data)
 {
 	struct reflist *list = (struct reflist *)cb_data;
 	struct refinfo *info = cgit_mk_refinfo(refname, sha1);
 
 	if (info)
 		cgit_add_ref(list, info);
 	return 0;
 }
 
 void cgit_diff_tree_cb(struct diff_queue_struct *q,
 		       struct diff_options *options, void *data)
 {
 	int i;
 
 	for (i = 0; i < q->nr; i++) {
 		if (q->queue[i]->status == 'U')
 			continue;
 		((filepair_fn)data)(q->queue[i]);
 	}
 }
 
 static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
 {
 	enum object_type type;
 
 	if (is_null_sha1(sha1)) {
 		file->ptr = (char *)"";
 		file->size = 0;
 	} else {
 		file->ptr = read_sha1_file(sha1, &type, 
 		                           (unsigned long *)&file->size);
 	}
 	return 1;
 }
 
 /*
  * Receive diff-buffers from xdiff and concatenate them as
  * needed across multiple callbacks.
  *
  * This is basically a copy of xdiff-interface.c/xdiff_outf(),
  * ripped from git and modified to use globals instead of
  * a special callback-struct.
  */
 char *diffbuf = NULL;
 int buflen = 0;
 
 int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 {
 	int i;
 
 	for (i = 0; i < nbuf; i++) {
 		if (mb[i].ptr[mb[i].size-1] != '\n') {
 			/* Incomplete line */
 			diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 			memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 			buflen += mb[i].size;
 			continue;
 		}
 
 		/* we have a complete line */
 		if (!diffbuf) {
 			((linediff_fn)priv)(mb[i].ptr, mb[i].size);
 			continue;
 		}
 		diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
 		memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
 		((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
 		free(diffbuf);
 		diffbuf = NULL;
 		buflen = 0;
 	}
 	if (diffbuf) {
 		((linediff_fn)priv)(diffbuf, buflen);
 		free(diffbuf);
 		diffbuf = NULL;
 		buflen = 0;
diff --git a/ui-shared.c b/ui-shared.c
index 0e688a0..97b9d46 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -452,266 +452,266 @@ void cgit_print_http_headers(struct cgit_context *ctx)
 	if (ctx->page.filename)
 		htmlf("Content-Disposition: inline; filename=\"%s\"\n",
 		      ctx->page.filename);
 	htmlf("Last-Modified: %s\n", http_date(ctx->page.modified));
 	htmlf("Expires: %s\n", http_date(ctx->page.expires));
 	html("\n");
 }
 
 void cgit_print_docstart(struct cgit_context *ctx)
 {
 	char *host = cgit_hosturl();
 	html(cgit_doctype);
 	html("<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>\n");
 	html("<head>\n");
 	html("<title>");
 	html_txt(ctx->page.title);
 	html("</title>\n");
 	htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 	if (ctx->cfg.robots && *ctx->cfg.robots)
 		htmlf("<meta name='robots' content='%s'/>\n", ctx->cfg.robots);
 	html("<link rel='stylesheet' type='text/css' href='");
 	html_attr(ctx->cfg.css);
 	html("'/>\n");
 	if (ctx->cfg.favicon) {
 		html("<link rel='shortcut icon' href='");
 		html_attr(ctx->cfg.favicon);
 		html("'/>\n");
 	}
 	if (host && ctx->repo) {
 		html("<link rel='alternate' title='Atom feed' href='http://");
 		html_attr(cgit_hosturl());
 		html_attr(cgit_fileurl(ctx->repo->url, "atom", ctx->qry.path,
 				       fmt("h=%s", ctx->qry.head)));
 		html("' type='application/atom+xml'/>");
 	}
 	html("</head>\n");
 	html("<body>\n");
 }
 
 void cgit_print_docend()
 {
 	html("</div>");
 	if (ctx.cfg.footer)
 		html_include(ctx.cfg.footer);
 	else {
 		htmlf("<div class='footer'>generated  by cgit %s at ",
 			cgit_version);
 		cgit_print_date(time(NULL), FMT_LONGDATE, ctx.cfg.local_time);
 		html("</div>\n");
 	}
 	html("</body>\n</html>\n");
 }
 
 int print_branch_option(const char *refname, const unsigned char *sha1,
 			int flags, void *cb_data)
 {
 	char *name = (char *)refname;
 	html_option(name, name, ctx.qry.head);
 	return 0;
 }
 
 int print_archive_ref(const char *refname, const unsigned char *sha1,
 		       int flags, void *cb_data)
 {
 	struct tag *tag;
 	struct taginfo *info;
 	struct object *obj;
 	char buf[256], *url;
 	unsigned char fileid[20];
 	int *header = (int *)cb_data;
 
 	if (prefixcmp(refname, "refs/archives"))
 		return 0;
 	strncpy(buf, refname+14, sizeof(buf));
 	obj = parse_object(sha1);
 	if (!obj)
 		return 1;
 	if (obj->type == OBJ_TAG) {
 		tag = lookup_tag(sha1);
 		if (!tag || parse_tag(tag) || !(info = cgit_parse_tag(tag)))
 			return 0;
 		hashcpy(fileid, tag->tagged->sha1);
 	} else if (obj->type != OBJ_BLOB) {
 		return 0;
 	} else {
 		hashcpy(fileid, sha1);
 	}
 	if (!*header) {
 		html("<h1>download</h1>\n");
 		*header = 1;
 	}
 	url = cgit_pageurl(ctx.qry.repo, "blob",
 			   fmt("id=%s&amp;path=%s", sha1_to_hex(fileid),
 			       buf));
 	html_link_open(url, NULL, "menu");
 	html_txt(strlpart(buf, 20));
 	html_link_close();
 	return 0;
 }
 
 void add_hidden_formfields(int incl_head, int incl_search, char *page)
 {
 	char *url;
 
 	if (!ctx.cfg.virtual_root) {
 		url = fmt("%s/%s", ctx.qry.repo, page);
 		if (ctx.qry.path)
 			url = fmt("%s/%s", url, ctx.qry.path);
 		html_hidden("url", url);
 	}
 
 	if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 	    strcmp(ctx.qry.head, ctx.repo->defbranch))
 		html_hidden("h", ctx.qry.head);
 
 	if (ctx.qry.sha1)
 		html_hidden("id", ctx.qry.sha1);
 	if (ctx.qry.sha2)
 		html_hidden("id2", ctx.qry.sha2);
 
 	if (incl_search) {
 		if (ctx.qry.grep)
 			html_hidden("qt", ctx.qry.grep);
 		if (ctx.qry.search)
 			html_hidden("q", ctx.qry.search);
 	}
 }
 
 char *hc(struct cgit_cmd *cmd, const char *page)
 {
 	return (strcmp(cmd->name, page) ? NULL : "active");
 }
 
 void cgit_print_pageheader(struct cgit_context *ctx)
 {
 	struct cgit_cmd *cmd = cgit_get_cmd(ctx);
 
 	html("<table id='header'>\n");
 	html("<tr>\n");
 	html("<td class='logo' rowspan='2'><a href='");
 	if (ctx->cfg.logo_link)
 		html_attr(ctx->cfg.logo_link);
 	else
 		html_attr(cgit_rooturl());
 	html("'><img src='");
 	html_attr(ctx->cfg.logo);
 	html("' alt='cgit logo'/></a></td>\n");
 
 	html("<td class='main'>");
 	if (ctx->repo) {
 		cgit_index_link("index", NULL, NULL, NULL, 0);
 		html(" : ");
 		cgit_summary_link(ctx->repo->name, ctx->repo->name, NULL, NULL);
 		html("</td><td class='form'>");
 		html("<form method='get' action=''>\n");
 		add_hidden_formfields(0, 1, ctx->qry.page);
 		html("<select name='h' onchange='this.form.submit();'>\n");
 		for_each_branch_ref(print_branch_option, ctx->qry.head);
 		html("</select> ");
 		html("<input type='submit' name='' value='switch'/>");
 		html("</form>");
 	} else
 		html_txt(ctx->cfg.root_title);
 	html("</td></tr>\n");
 
 	html("<tr><td class='sub'>");
 	if (ctx->repo) {
 		html_txt(ctx->repo->desc);
 		html("</td><td class='sub right'>");
 		html_txt(ctx->repo->owner);
 	} else {
 		if (ctx->cfg.root_desc)
 			html_txt(ctx->cfg.root_desc);
 		else if (ctx->cfg.index_info)
 			html_include(ctx->cfg.index_info);
 	}
 	html("</td></tr></table>\n");
 
 	html("<table class='tabs'><tr><td>\n");
 	if (ctx->repo) {
 		cgit_summary_link("summary", NULL, hc(cmd, "summary"),
 				  ctx->qry.head);
 		cgit_refs_link("refs", NULL, hc(cmd, "refs"), ctx->qry.head,
 			       ctx->qry.sha1, NULL);
 		cgit_log_link("log", NULL, hc(cmd, "log"), ctx->qry.head,
 			      NULL, NULL, 0, NULL, NULL);
 		cgit_tree_link("tree", NULL, hc(cmd, "tree"), ctx->qry.head,
 			       ctx->qry.sha1, NULL);
 		cgit_commit_link("commit", NULL, hc(cmd, "commit"),
 				 ctx->qry.head, ctx->qry.sha1);
 		cgit_diff_link("diff", NULL, hc(cmd, "diff"), ctx->qry.head,
 			       ctx->qry.sha1, ctx->qry.sha2, NULL);
-		if (ctx->repo->enable_stats)
+		if (ctx->repo->max_stats)
 			reporevlink("stats", "stats", NULL, hc(cmd, "stats"),
 				    ctx->qry.head, NULL, NULL);
 		if (ctx->repo->readme)
 			reporevlink("about", "about", NULL,
 				    hc(cmd, "about"), ctx->qry.head, NULL,
 				    NULL);
 		html("</td><td class='form'>");
 		html("<form class='right' method='get' action='");
 		if (ctx->cfg.virtual_root)
 			html_url_path(cgit_fileurl(ctx->qry.repo, "log",
 						   ctx->qry.path, NULL));
 		html("'>\n");
 		add_hidden_formfields(1, 0, "log");
 		html("<select name='qt'>\n");
 		html_option("grep", "log msg", ctx->qry.grep);
 		html_option("author", "author", ctx->qry.grep);
 		html_option("committer", "committer", ctx->qry.grep);
 		html("</select>\n");
 		html("<input class='txt' type='text' size='10' name='q' value='");
 		html_attr(ctx->qry.search);
 		html("'/>\n");
 		html("<input type='submit' value='search'/>\n");
 		html("</form>\n");
 	} else {
 		site_link(NULL, "index", NULL, hc(cmd, "repolist"), NULL, 0);
 		if (ctx->cfg.root_readme)
 			site_link("about", "about", NULL, hc(cmd, "about"),
 				  NULL, 0);
 		html("</td><td class='form'>");
 		html("<form method='get' action='");
 		html_attr(cgit_rooturl());
 		html("'>\n");
 		html("<input type='text' name='q' size='10' value='");
 		html_attr(ctx->qry.search);
 		html("'/>\n");
 		html("<input type='submit' value='search'/>\n");
 		html("</form>");
 	}
 	html("</td></tr></table>\n");
 	html("<div class='content'>");
 }
 
 void cgit_print_filemode(unsigned short mode)
 {
 	if (S_ISDIR(mode))
 		html("d");
 	else if (S_ISLNK(mode))
 		html("l");
 	else if (S_ISGITLINK(mode))
 		html("m");
 	else
 		html("-");
 	html_fileperm(mode >> 6);
 	html_fileperm(mode >> 3);
 	html_fileperm(mode);
 }
 
 void cgit_print_snapshot_links(const char *repo, const char *head,
 			       const char *hex, int snapshots)
 {
 	const struct cgit_snapshot_format* f;
     	char *filename;
 
 	for (f = cgit_snapshot_formats; f->suffix; f++) {
 		if (!(snapshots & f->bit))
 			continue;
 		filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
 			       f->suffix);
 		cgit_snapshot_link(filename, NULL, NULL, (char *)head,
 				   (char *)hex, filename);
 		html("<br/>");
 	}
 }
diff --git a/ui-stats.c b/ui-stats.c
index 3cc8d70..1104485 100644
--- a/ui-stats.c
+++ b/ui-stats.c
@@ -1,392 +1,411 @@
+#include <string-list.h>
+
 #include "cgit.h"
 #include "html.h"
-#include <string-list.h>
+#include "ui-shared.h"
+#include "ui-stats.h"
 
 #define MONTHS 6
 
-struct Period {
-	const char code;
-	const char *name;
-	int max_periods;
-	int count;
-
-	/* Convert a tm value to the first day in the period */
-	void (*trunc)(struct tm *tm);
-
-	/* Update tm value to start of next/previous period */
-	void (*dec)(struct tm *tm);
-	void (*inc)(struct tm *tm);
-
-	/* Pretty-print a tm value */
-	char *(*pretty)(struct tm *tm);
-};
-
 struct authorstat {
 	long total;
 	struct string_list list;
 };
 
 #define DAY_SECS (60 * 60 * 24)
 #define WEEK_SECS (DAY_SECS * 7)
 
 static void trunc_week(struct tm *tm)
 {
 	time_t t = timegm(tm);
 	t -= ((tm->tm_wday + 6) % 7) * DAY_SECS;
 	gmtime_r(&t, tm);	
 }
 
 static void dec_week(struct tm *tm)
 {
 	time_t t = timegm(tm);
 	t -= WEEK_SECS;
 	gmtime_r(&t, tm);	
 }
 
 static void inc_week(struct tm *tm)
 {
 	time_t t = timegm(tm);
 	t += WEEK_SECS;
 	gmtime_r(&t, tm);	
 }
 
 static char *pretty_week(struct tm *tm)
 {
 	static char buf[10];
 
 	strftime(buf, sizeof(buf), "W%V %G", tm);
 	return buf;
 }
 
 static void trunc_month(struct tm *tm)
 {
 	tm->tm_mday = 1;
 }
 
 static void dec_month(struct tm *tm)
 {
 	tm->tm_mon--;
 	if (tm->tm_mon < 0) {
 		tm->tm_year--;
 		tm->tm_mon = 11;
 	}
 }
 
 static void inc_month(struct tm *tm)
 {
 	tm->tm_mon++;
 	if (tm->tm_mon > 11) {
 		tm->tm_year++;
 		tm->tm_mon = 0;
 	}
 }
 
 static char *pretty_month(struct tm *tm)
 {
 	static const char *months[] = {
 		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
 		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
 	};
 	return fmt("%s %d", months[tm->tm_mon], tm->tm_year + 1900);
 }
 
 static void trunc_quarter(struct tm *tm)
 {
 	trunc_month(tm);
 	while(tm->tm_mon % 3 != 0)
 		dec_month(tm);
 }
 
 static void dec_quarter(struct tm *tm)
 {
 	dec_month(tm);
 	dec_month(tm);
 	dec_month(tm);
 }
 
 static void inc_quarter(struct tm *tm)
 {
 	inc_month(tm);
 	inc_month(tm);
 	inc_month(tm);
 }
 
 static char *pretty_quarter(struct tm *tm)
 {
 	return fmt("Q%d %d", tm->tm_mon / 3 + 1, tm->tm_year + 1900);
 }
 
 static void trunc_year(struct tm *tm)
 {
 	trunc_month(tm);
 	tm->tm_mon = 0;
 }
 
 static void dec_year(struct tm *tm)
 {
 	tm->tm_year--;
 }
 
 static void inc_year(struct tm *tm)
 {
 	tm->tm_year++;
 }
 
 static char *pretty_year(struct tm *tm)
 {
 	return fmt("%d", tm->tm_year + 1900);
 }
 
-struct Period periods[] = {
+struct cgit_period periods[] = {
 	{'w', "week", 12, 4, trunc_week, dec_week, inc_week, pretty_week},
 	{'m', "month", 12, 4, trunc_month, dec_month, inc_month, pretty_month},
 	{'q', "quarter", 12, 4, trunc_quarter, dec_quarter, inc_quarter, pretty_quarter},
 	{'y', "year", 12, 4, trunc_year, dec_year, inc_year, pretty_year},
 };
 
+/* Given a period code or name, return a period index (1, 2, 3 or 4)
+ * and update the period pointer to the correcsponding struct.
+ * If no matching code is found, return 0.
+ */
+int cgit_find_stats_period(const char *expr, struct cgit_period **period)
+{
+	int i;
+	char code = '\0';
+
+	if (!expr)
+		return 0;
+
+	if (strlen(expr) == 1)
+		code = expr[0];
+
+	for (i = 0; i < sizeof(periods) / sizeof(periods[0]); i++)
+		if (periods[i].code == code || !strcmp(periods[i].name, expr)) {
+			if (period)
+				*period = &periods[i];
+			return i+1;
+		}
+	return 0;
+}
+
 static void add_commit(struct string_list *authors, struct commit *commit,
-	struct Period *period)
+	struct cgit_period *period)
 {
 	struct commitinfo *info;
 	struct string_list_item *author, *item;
 	struct authorstat *authorstat;
 	struct string_list *items;
 	char *tmp;
 	struct tm *date;
 	time_t t;
 
 	info = cgit_parse_commit(commit);
 	tmp = xstrdup(info->author);
 	author = string_list_insert(tmp, authors);
 	if (!author->util)
 		author->util = xcalloc(1, sizeof(struct authorstat));
 	else
 		free(tmp);
 	authorstat = author->util;
 	items = &authorstat->list;
 	t = info->committer_date;
 	date = gmtime(&t);
 	period->trunc(date);
 	tmp = xstrdup(period->pretty(date));
 	item = string_list_insert(tmp, items);
 	if (item->util)
 		free(tmp);
 	item->util++;
 	authorstat->total++;
 	cgit_free_commitinfo(info);
 }
 
 static int cmp_total_commits(const void *a1, const void *a2)
 {
 	const struct string_list_item *i1 = a1;
 	const struct string_list_item *i2 = a2;
 	const struct authorstat *auth1 = i1->util;
 	const struct authorstat *auth2 = i2->util;
 
 	return auth2->total - auth1->total;
 }
 
 /* Walk the commit DAG and collect number of commits per author per
  * timeperiod into a nested string_list collection.
  */
 struct string_list collect_stats(struct cgit_context *ctx,
-	struct Period *period)
+	struct cgit_period *period)
 {
 	struct string_list authors;
 	struct rev_info rev;
 	struct commit *commit;
 	const char *argv[] = {NULL, ctx->qry.head, NULL, NULL, NULL, NULL};
 	int argc = 3;
 	time_t now;
 	long i;
 	struct tm *tm;
 	char tmp[11];
 
 	time(&now);
 	tm = gmtime(&now);
 	period->trunc(tm);
 	for (i = 1; i < period->count; i++)
 		period->dec(tm);
 	strftime(tmp, sizeof(tmp), "%Y-%m-%d", tm);
 	argv[2] = xstrdup(fmt("--since=%s", tmp));
 	if (ctx->qry.path) {
 		argv[3] = "--";
 		argv[4] = ctx->qry.path;
 		argc += 2;
 	}
 	init_revisions(&rev, NULL);
 	rev.abbrev = DEFAULT_ABBREV;
 	rev.commit_format = CMIT_FMT_DEFAULT;
 	rev.no_merges = 1;
 	rev.verbose_header = 1;
 	rev.show_root_diff = 0;
 	setup_revisions(argc, argv, &rev, NULL);
 	prepare_revision_walk(&rev);
 	memset(&authors, 0, sizeof(authors));
 	while ((commit = get_revision(&rev)) != NULL) {
 		add_commit(&authors, commit, period);
 		free(commit->buffer);
 		free_commit_list(commit->parents);
 	}
 	return authors;
 }
 
 void print_combined_authorrow(struct string_list *authors, int from, int to,
 	const char *name, const char *leftclass, const char *centerclass,
-	const char *rightclass, struct Period *period)
+	const char *rightclass, struct cgit_period *period)
 {
 	struct string_list_item *author;
 	struct authorstat *authorstat;
 	struct string_list *items;
 	struct string_list_item *date;
 	time_t now;
 	long i, j, total, subtotal;
 	struct tm *tm;
 	char *tmp;
 
 	time(&now);
 	tm = gmtime(&now);
 	period->trunc(tm);
 	for (i = 1; i < period->count; i++)
 		period->dec(tm);
 
 	total = 0;
 	htmlf("<tr><td class='%s'>%s</td>", leftclass,
 		fmt(name, to - from + 1));
 	for (j = 0; j < period->count; j++) {
 		tmp = period->pretty(tm);
 		period->inc(tm);
 		subtotal = 0;
 		for (i = from; i <= to; i++) {
 			author = &authors->items[i];
 			authorstat = author->util;
 			items = &authorstat->list;
 			date = string_list_lookup(tmp, items);
 			if (date)
 				subtotal += (size_t)date->util;
 		}
 		htmlf("<td class='%s'>%d</td>", centerclass, subtotal);
 		total += subtotal;
 	}
 	htmlf("<td class='%s'>%d</td></tr>", rightclass, total);
 }
 
-void print_authors(struct string_list *authors, int top, struct Period *period)
+void print_authors(struct string_list *authors, int top,
+		   struct cgit_period *period)
 {
 	struct string_list_item *author;
 	struct authorstat *authorstat;
 	struct string_list *items;
 	struct string_list_item *date;
 	time_t now;
 	long i, j, total;
 	struct tm *tm;
 	char *tmp;
 
 	time(&now);
 	tm = gmtime(&now);
 	period->trunc(tm);
 	for (i = 1; i < period->count; i++)
 		period->dec(tm);
 
 	html("<table class='stats'><tr><th>Author</th>");
 	for (j = 0; j < period->count; j++) {
 		tmp = period->pretty(tm);
 		htmlf("<th>%s</th>", tmp);
 		period->inc(tm);
 	}
 	html("<th>Total</th></tr>\n");
 
 	if (top <= 0 || top > authors->nr)
 		top = authors->nr;
 
 	for (i = 0; i < top; i++) {
 		author = &authors->items[i];
 		html("<tr><td class='left'>");
 		html_txt(author->string);
 		html("</td>");
 		authorstat = author->util;
 		items = &authorstat->list;
 		total = 0;
 		for (j = 0; j < period->count; j++)
 			period->dec(tm);
 		for (j = 0; j < period->count; j++) {
 			tmp = period->pretty(tm);
 			period->inc(tm);
 			date = string_list_lookup(tmp, items);
 			if (!date)
 				html("<td>0</td>");
 			else {
 				htmlf("<td>%d</td>", date->util);
 				total += (size_t)date->util;
 			}
 		}
 		htmlf("<td class='sum'>%d</td></tr>", total);
 	}
 
 	if (top < authors->nr)
 		print_combined_authorrow(authors, top, authors->nr - 1,
 			"Others (%d)", "left", "", "sum", period);
 
 	print_combined_authorrow(authors, 0, authors->nr - 1, "Total",
 		"total", "sum", "sum", period);
 	html("</table>");
 }
 
 /* Create a sorted string_list with one entry per author. The util-field
  * for each author is another string_list which is used to calculate the
  * number of commits per time-interval.
  */
 void cgit_show_stats(struct cgit_context *ctx)
 {
 	struct string_list authors;
-	struct Period *period;
+	struct cgit_period *period;
 	int top, i;
+	const char *code = "w";
 
-	period = &periods[0];
-	if (ctx->qry.period) {
-		for (i = 0; i < sizeof(periods) / sizeof(periods[0]); i++)
-			if (periods[i].code == ctx->qry.period[0]) {
-				period = &periods[i];
-				break;
-			}
+	if (ctx->qry.period)
+		code = ctx->qry.period;
+
+	i = cgit_find_stats_period(code, &period);
+	if (!i) {
+		cgit_print_error(fmt("Unknown statistics type: %c", code));
+		return;
+	}
+	if (i > ctx->repo->max_stats) {
+		cgit_print_error(fmt("Statistics type disabled: %s",
+				     period->name));
+		return;
 	}
 	authors = collect_stats(ctx, period);
 	qsort(authors.items, authors.nr, sizeof(struct string_list_item),
 		cmp_total_commits);
 
 	top = ctx->qry.ofs;
 	if (!top)
 		top = 10;
 	htmlf("<h2>Commits per author per %s", period->name);
 	if (ctx->qry.path) {
 		html(" (path '");
 		html_txt(ctx->qry.path);
 		html("')");
 	}
 	html("</h2>");
 
 	html("<form method='get' action='.' style='float: right; text-align: right;'>");
 	if (strcmp(ctx->qry.head, ctx->repo->defbranch))
 		htmlf("<input type='hidden' name='h' value='%s'/>", ctx->qry.head);
-	html("Period: ");
-	html("<select name='period' onchange='this.form.submit();'>");
-	for (i = 0; i < sizeof(periods) / sizeof(periods[0]); i++)
-		htmlf("<option value='%c'%s>%s</option>",
-			periods[i].code,
-			period == &periods[i] ? " selected" : "",
-			periods[i].name);
-	html("</select><br/><br/>");
+	if (ctx->repo->max_stats > 1) {
+		html("Period: ");
+		html("<select name='period' onchange='this.form.submit();'>");
+		for (i = 0; i < ctx->repo->max_stats; i++)
+			htmlf("<option value='%c'%s>%s</option>",
+				periods[i].code,
+				period == &periods[i] ? " selected" : "",
+				periods[i].name);
+		html("</select><br/><br/>");
+	}
 	html("Authors: ");
 	html("");
 	html("<select name='ofs' onchange='this.form.submit();'>");
 	htmlf("<option value='10'%s>10</option>", top == 10 ? " selected" : "");
 	htmlf("<option value='25'%s>25</option>", top == 25 ? " selected" : "");
 	htmlf("<option value='50'%s>50</option>", top == 50 ? " selected" : "");
 	htmlf("<option value='100'%s>100</option>", top == 100 ? " selected" : "");
 	htmlf("<option value='-1'%s>All</option>", top == -1 ? " selected" : "");
 	html("</select>");
 	html("<noscript>&nbsp;&nbsp;<input type='submit' value='Reload'/></noscript>");
 	html("</form>");
 	print_authors(&authors, top, period);
 }
 
diff --git a/ui-stats.h b/ui-stats.h
index f1d744c..4f13dba 100644
--- a/ui-stats.h
+++ b/ui-stats.h
@@ -1,8 +1,27 @@
 #ifndef UI_STATS_H
 #define UI_STATS_H
 
 #include "cgit.h"
 
+struct cgit_period {
+	const char code;
+	const char *name;
+	int max_periods;
+	int count;
+
+	/* Convert a tm value to the first day in the period */
+	void (*trunc)(struct tm *tm);
+
+	/* Update tm value to start of next/previous period */
+	void (*dec)(struct tm *tm);
+	void (*inc)(struct tm *tm);
+
+	/* Pretty-print a tm value */
+	char *(*pretty)(struct tm *tm);
+};
+
+extern int cgit_find_stats_period(const char *expr, struct cgit_period **period);
+
 extern void cgit_show_stats(struct cgit_context *ctx);
 
 #endif /* UI_STATS_H */