ci(travisci): use an external script to run deployment stage

Author: scostello

.travis.yml

@@ -34,19 +34,4 @@ jobs:
         skip_cleanup: true
         on:
           branch: master
-        script: |-
-          npx \
-            -p semantic-release \
-            -p @semantic-release/commit-analyzer \
-            -p @semantic-release/release-notes-generator \
-            -p @semantic-release/changelog \
-            -p @semantic-release/npm \
-            -p @semantic-release/git \
-            -p @semantic-release/github \
-            --branch master \
-            --repository-url https://github.com/scostello/pfa-api
-          export RELEASE_VERSION=$(cat package.json | jq -r .version)
-
-          docker pull quay.io/$DOCKER_USERNAME/pfa-api:build-$TRAVIS_BUILD_NUMBER
-          docker tag quay.io/$DOCKER_USERNAME/pfa-api:build-$TRAVIS_BUILD_NUMBER quay.io/$DOCKER_USERNAME/pfa-api:release-$RELEASE_VERSION
-          docker push quay.io/$DOCKER_USERNAME/pfa-api:release-$RELEASE_VERSION
+        script: ./scripts/deploy.sh

scripts/deploy.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+prev_version=$(cat package.json | jq -r .version)
+
+# Running semantic-release
+npx \
+  -p semantic-release \
+  -p @semantic-release/commit-analyzer \
+  -p @semantic-release/release-notes-generator \
+  -p @semantic-release/changelog \
+  -p @semantic-release/npm \
+  -p @semantic-release/git \
+  -p @semantic-release/github \
+  --branch master \
+  --repository-url https://github.com/scostello/pfa-api
+
+# Grab the release version from package.json
+new_version=$(cat package.json | jq -r .version)
+
+echo "Comparing package.json versions after semantic-release"
+echo "${prev_version} == ${new_version}"
+if [[ ${prev_version} != "${new_version}" ]]; then
+  echo "New version detected. Running docker deployment..."
+  docker pull quay.io/$DOCKER_USERNAME/pfa-api:build-$TRAVIS_BUILD_NUMBER
+  docker tag quay.io/$DOCKER_USERNAME/pfa-api:build-$TRAVIS_BUILD_NUMBER quay.io/$DOCKER_USERNAME/pfa-api:release-${new_version}
+  docker push quay.io/$DOCKER_USERNAME/pfa-api:release-${new_version}
+else
+  echo "No new version detected. Skipping docker deployment..."
+fi