Show time since last change on index page

When creating the index page, an optional file can be scanned per repository
to obtain a timestamp for last modification within the repo. If such a file
cannot be found, st_mtime for repo.defbranch is used instead.

This information is then printed in a new column, "Idle", using the new
function cgit_print_age().

The new parameter "repo.agefile" can be used to specify (globally) a relative
path to scan (default value is "info/web/last-modified").

The content of the "last-modified" file can be generated by the post-receive
hook with a command like this:

	git-for-each-ref --format="%(committerdate)" --sort=-committerdate \
	--count=1 > $GIT_DIR/info/web/last-modified

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

3 files changed, 43 insertions, 1 deletions

diff --git a/cgit.h b/cgit.h
index 4da2d3d..3938633 100644
--- a/cgit.h
+++ b/cgit.h
@@ -111,4 +111,5 @@ extern char *cgit_index_header;
 extern char *cgit_logo_link;
 extern char *cgit_module_link;
+extern char *cgit_agefile;
 extern char *cgit_virtual_root;
 extern char *cgit_script_name;
diff --git a/shared.c b/shared.c
index 65af11a..ce3ca4f 100644
--- a/shared.c
+++ b/shared.c
@@ -19,4 +19,5 @@ char *cgit_index_header = NULL;
 char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
 char *cgit_module_link  = "./?repo=%s&page=commit&id=%s";
+char *cgit_agefile      = "info/web/last-modified";
 char *cgit_virtual_root = NULL;
 char *cgit_script_name  = CGIT_SCRIPT_NAME;
@@ -163,4 +164,6 @@ void cgit_global_config_cb(const char *name, const char *value)
 	else if (!strcmp(name, "max-commit-count"))
 		cgit_max_commit_count = atoi(value);
+	else if (!strcmp(name, "agefile"))
+		cgit_agefile = xstrdup(value);
 	else if (!strcmp(name, "repo.group"))
 		cgit_repo_group = xstrdup(value);
diff --git a/ui-repolist.c b/ui-repolist.c
index f5e087f..573c730 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -8,4 +8,39 @@
 
 #include "cgit.h"
+#include <time.h>
+
+
+time_t read_agefile(char *path)
+{
+	FILE *f;
+	static char buf[64], buf2[64];
+	struct tm tm;
+
+	if (!(f = fopen(path, "r")))
+		return -1;
+	fgets(buf, sizeof(buf), f);
+	fclose(f);
+	if (parse_date(buf, buf2, sizeof(buf2)))
+		return strtoul(buf2, NULL, 10);
+	else
+		return 0;
+}
+
+static void print_modtime(struct repoinfo *repo)
+{
+	char *path;
+	struct stat s;
+
+	path = fmt("%s/%s", repo->path, cgit_agefile);
+	if (stat(path, &s) == 0) {
+		cgit_print_age(read_agefile(path), -1, NULL);
+		return;
+	}
+
+	path = fmt("%s/refs/heads/%s", repo->path, repo->defbranch);
+	if (stat(path, &s) != 0)
+		return;
+	cgit_print_age(s.st_mtime, -1, NULL);
+}
 
 void cgit_print_repolist(struct cacheitem *item)
@@ -20,5 +55,5 @@ void cgit_print_repolist(struct cacheitem *item)
 	html("<table class='list nowrap'>");
 	if (cgit_index_header) {
-		html("<tr class='nohover'><td colspan='4' class='include-block'>");
+		html("<tr class='nohover'><td colspan='5' class='include-block'>");
 		html_include(cgit_index_header);
 		html("</td></tr>");
@@ -28,4 +63,5 @@ void cgit_print_repolist(struct cacheitem *item)
 	     "<th class='left'>Description</th>"
 	     "<th class='left'>Owner</th>"
+	     "<th class='left'>Idle</th>"
 	     "<th>Links</th></tr>\n");
 
@@ -51,4 +87,6 @@ void cgit_print_repolist(struct cacheitem *item)
 		html_txt(repo->owner);
 		html("</td><td>");
+		print_modtime(repo);
+		html("</td><td>");
 		html_link_open(cgit_repourl(repo->url),
 			       "Summary", "button");