bash script for installing customizations in heroku deploy

Procfile

@@ -1 +1 @@
-web: npm run build && npm start
+web: ./bin/install_customizations && npm run build && npm start

README.md

@@ -99,6 +99,11 @@ To set the proper Heroku config variables, make sure to [set up a Google service
 //registry.npmjs.org/:_authToken=${NPM_TOKEN}
 ```
 
+If you wish to deploy Library with customizations, create a git repo with the files
+you would like to include. Set the `CUSTOMIZATION_GIT_REPO` environment variable
+to the cloning URL. Files in the repo and packages specified in the `package.json`
+will be included in your library installation.
+
 ### Using Docker
 Library can be used as a base image for deployment using Docker. This allows you
 to automate building and deploying a custom version of Library during Docker's

app.json

@@ -35,10 +35,13 @@
       "required": true,
       "generator": "secret"
     },
+    "CUSTOMIZATION_GIT_REPO": {
+      "required": false,
+      "description": "A git with the contents of your 'custom' directory for automatic deployment."
+    },
     "NPM_TOKEN": {
       "description": "Enter an NPM token if you are using private modules",
       "required": false
     }
   }
 }
-

bin/install_customizations

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+echo "Checking for CUSTOMIZATION_GIT_REPO environment variable..."
+
+if ! [[ -z ${CUSTOMIZATION_GIT_REPO} ]];
+  then
+    echo "Cloning custom repo...";
+    rm -rf ./custom;
+    git clone $CUSTOMIZATION_GIT_REPO custom;
+    echo "Installing custom packages...";
+    cd ./custom;
+    npm i;
+    yes | cp -rf ./node_modules/* ../node_modules;
+    cd ..;
+    echo "Rebuilding assets..."
+    npm run build;
+  else
+    echo "Not found. Continuing with standard Library deploy";
+fi;
+
+echo "Done!"