Add 'rebuild.sh' to rebuild a docker image

distillery/lib/40_templates.sh

@@ -41,7 +41,7 @@ function install_resource_dir() {
     for filename in "$from"/*; do
         dest="$to/`basename "${filename}"`"
         echo "Writing \"$dest\""
-        cp -r "$filename"  "$dest"
+        cp -rTv "$filename"  "$dest"
     done
 }
 

distillery/lib/50_utils.sh

@@ -13,4 +13,12 @@ export DEBIAN_FRONTEND=noninteractive
 
 # This file just sets a few utility functions to be used by the code. 
 # randompw generates a random password as per the configuration file. 
-alias randompw="cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w $PASSWORD_LENGTH | head -n 1"
+alias randompw="cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w $PASSWORD_LENGTH | head -n 1"
+
+# update_stack fully updates a docker-compose stack in the given location. 
+function update_stack() {
+    cd "$1"
+    docker-compose pull
+    docker-compose build --pull
+    docker-compose up -d
+}