Copy GitHub SSH key in Heroku to access private repositories

heroku-copy-ssh-key-from-env.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# Since we have a dependency to a private GitHub
+# `sharetribe/sharetribe-sdk-js` repository, we must give Heroku SSH
+# access to there. This script copies the GITHUB_SSH_KEY to the
+# current user to enable SSH access to the repository.
+
+# NOTE: This script should be removed when the dependency is not a
+# private repository anymore.
+
+set -e
+
+if [ -z "$GITHUB_SSH_KEY" ]
+then
+    echo "No GitHub SSH key to copy"
+    exit 0
+fi
+
+echo "Copying GitHub SSH key"
+mkdir -p ~/.ssh
+chmod 700 ~/.ssh
+echo "$GITHUB_SSH_KEY" > ~/.ssh/id_rsa
+chmod 600 ~/.ssh/id_rsa
+
+echo "Adding GitHub SSH Host key to known hosts"
+ssh-keyscan -H github.com >> ~/.ssh/known_hosts
+chmod 600 ~/.ssh/known_hosts

package.json

@@ -44,6 +44,7 @@
     "eject": "sharetribe-scripts eject",
     "start": "node server/index.js",
     "dev-server": "yarn run build&&nodemon --watch server server/index.js",
+    "heroku-prebuild": "./heroku-copy-ssh-key-from-env.sh",
     "heroku-postbuild": "yarn run build"
   },
   "engines": {