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diff --git a/templates/pmwiki.sh.erb b/templates/pmwiki.sh.erb
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+#!/bin/bash
+#
+# pmwiki management script.
+#
+
+BASE="<%= apache_www_folder %>"
+
+# Check for existing installations
+function pmwiki_check_existing {
+  if [ -e "$BASE/pmwiki-$1" ]; then
+    echo "Folder $BASE/pmwiki-$1 already exist, skipping"
+    exit 1
+  fi  
+}
+
+# Deploy a fresh pmwiki tree
+function pmwiki_deploy {
+  if [ "$#" != "1" ]; then
+    echo "Usage: `basename $0` deploy <version>"
+    exit 1
+  fi
+
+  # Setup
+  new="$1"
+  cd $BASE
+  pmwiki_check_existing $new
+
+  # Deploy a fresh pmwiki tree
+  wget http://pmwiki.org/pub/pmwiki/pmwiki-$new.tgz
+  wget http://pmwiki.org/pub/pmwiki/i18n/i18n-all.zip
+  tar zxvf pmwiki-$new.tgz && rm pmwiki-$new.tgz
+  ( cd pmwiki-$new && unzip ../i18n-all.zip && rm $_ )
+  chown -R root.root pmwiki-$new/
+}
+
+# Upgrade a pmwiki instance using upstream source.
+function pmwiki_upgrade {
+  if [ "$#" != "2" ]; then
+    echo "Usage: `basename $0` upgrade <old_version> <new_version>"
+    exit 1
+  fi
+
+  # Setup
+  old="$1"
+  new="$2"
+  extra_folders=""
+  
+  pmwiki_check_existing $new
+
+  cd $BASE
+  cp -a pmwiki-$old pmwiki-$old.backup
+  
+  # Deploy a fresh pmwiki tree
+  pmwiki_deploy $new
+  
+  # Copy files
+  for file in .htaccess index.php farmconfig.php local config.php; do
+    if [ -f "pmwiki-$old/$file" ]; then
+      cp pmwiki-$old/$file pmwiki-$new/
+    fi
+    if [ -f "pmwiki-$old/local/$file" ]; then
+      cp pmwiki-$old/local/$file pmwiki-$new/local/
+    fi
+  done
+  for extra_folder in $extra_folders; do
+    if [ -d ../pmwiki-$old/$extra_folder ]; then
+      cp -Rp ../pmwiki-$old/$extra_folder .
+    fi
+  done
+  
+  # Themes and cookbook
+  rsync -av pmwiki-$old/cookbook/ pmwiki-$new/cookbook
+  rsync -av --exclude=pmwiki --exclude=print pmwiki-$old/pub/skins/ pmwiki-$new/pub/skins/
+
+  # Change symlink to point to the new location
+  cd $BASE ; rm -f wiki && ln -s pmwiki-$new wiki
+
+  # Done
+  echo "Audit: `du -hs pmwiki-$old`"
+  echo "Audit: `du -hs pmwiki-$new`"
+  echo "Check procedure and remove pmwiki-$old once you make sure that everything is fine."
+}
+
+# Main procedure
+if [ -z "$1" ]; then
+  echo "Usage: `basename $0` <deploy|update|upgrade> [arguments]"
+  exit 1
+elif [ "$1" == "deploy" ]; then
+  shift
+  pmwiki_deploy $*
+elif [ "$1" == "upgrade" ]; then
+  shift
+  pmwiki_upgrade $*
+fi