cgit.a.o: implement 'idle' to mean time since most recent commit to any branch

cgit.adelielinux.org/update

@@ -18,20 +18,30 @@ mkdir -p "${DATA}";
 #
 sync ()
 {
-    # cache server response
-    # TODO: support pagination
+    ##
+    # Cache GitLab API server response (JSON) as pre-parsed CSV data.
+    # TODO: support pagination (API supports max 100 results per page).
+    #
     curl -s ${GLAB}/api/v4/groups/${1}/projects?per_page=100 \
         | jq -r '.[] | select(.archived == false) | .http_url_to_repo + "%" + .description' > "${KEEP}";
 
-    # clone, pull, and/or update descriptions for current repositories
+    ##
+    # Clone, pull, and/or update descriptions for current repositories.
+    #
     while read k; do
     (
         repo=${k%\%*};
         name=${repo##*/};
         desc=${k#*\%};
+
         cd "${DATA}";
+
         mkdir -p ${1};
         cd ${1};
+
+        ##
+        # Core data.
+        #
         if ! test -d ${name%.*}; then
             mkdir ${name%.*};
             git clone --mirror ${repo} ${name%.*}/.git;
@@ -40,7 +50,28 @@ sync ()
         else
             git -C ${name%.*} remote update --prune;
         fi
+
+        ##
+        # Write repository description from GitLab API for cgit to read.
+        #
         printf > ${name%.*}/.git/description "%s" "${desc}";
+
+        ##
+        # Delete '.git/refs/' directory contents (cgit uses 'packed-refs' when empty).
+        # Find time of latest commit to any branch, and set 'packed-refs' mtime to it.
+        #
+        find ${name%.*}/.git/refs -type f -delete;
+        when=$(git -C ${name%.*} --no-pager branch -al \
+            | sed -e 's/*//g' \
+            | while read b; do git -C ${name%.*} --no-pager log -1 --format=%cd --date=unix ${b}; done \
+            | sort -nr \
+            | head -n 1 \
+            );
+        touch --date=@${when} ${name%.*}/.git/packed-refs;
+
+        ##
+        # Mark as wanting to keep this repository during cleanup.
+        #
         printf >> "${HAVE}" "%s/%s\n" "${1}" "${name%.*}";
     )
     done < "${KEEP}";