ci(travis): add the encrypted private deploy key

Add an encrypted SSH deploy key.

Author: Arcanemagus

.travis.yml

@@ -8,6 +8,24 @@ jobs:
     - stage: test
       node_js: node
 
+    - stage: release
+      before_deploy:
+        # Decrypt the git_deploy_key.enc key into /tmp/git_deploy_key
+        - openssl aes-256-cbc -K $encrypted_5690340abf23_key -iv $encrypted_5690340abf23_iv -in git_deploy_key.enc -out /tmp/git_deploy_key -d
+        # Make sure only the current user can read the private key
+        - chmod 600 /tmp/git_deploy_key
+        # Create a script to return the passphrase environment variable to ssh-add
+        - echo 'echo ${SSH_PASSPHRASE}' > /tmp/askpass && chmod +x /tmp/askpass
+        # Start the authentication agent
+        - eval "$(ssh-agent -s)"
+        # Add the key to the authentication agent
+        - DISPLAY=":0.0" SSH_ASKPASS="/tmp/askpass" setsid ssh-add /tmp/git_deploy_key </dev/null
+      deploy:
+        provider: script
+        skip_cleanup: true
+        script:
+          - echo "npx semantic-release"
+
 notifications:
   email:
     on_success: never