Remove projects in Jenkins workspace with no files modified within the past 90 days

jenkins-workspace-cleanup.sh

#!/bin/bash

WORKSPACE_DIR=/var/lib/jenkins/workspace
DAYS_TO_KEEP=90
DRY_RUN=1
VERBOSE=1

[ $DRY_RUN ] && echo "DRY RUN..."

for projectdir in `ls -d1 "$WORKSPACE_DIR"/*`; do
  num_new_files=$(find "$projectdir" -mtime -$DAYS_TO_KEEP -not -path "$projectdir/.git/*" | wc -l)
  if [ $num_new_files == "0" ]; then
    if [ $DRY_RUN ]; then 
      echo "Would remove $projectdir"
    else
      [ $VERBOSE ] && echo "Removing $projectdir"
      rm -rf "$projectdir"
    fi
  else
    [ $VERBOSE ] && echo "Skipping $projectdir ($num_new_files files <$DAYS_TO_KEEP days)" 
  fi
done