Run conditionally

Author: andy-fastly

.github/workflows/build.yml

@@ -15,7 +15,6 @@ jobs:
         go: [ '1.14' ]
     name: Build ${{ matrix.go }}
     steps:
-    - run: echo '${{ github.ref }}'
     - uses: aws-actions/configure-aws-credentials@v1
       with:
         aws-access-key-id: ${{ secrets.SIGSCI_PROD_ACCESS_KEY_ID }}
@@ -26,7 +25,7 @@ jobs:
     - name: build
       run: ./scripts/build.sh
     - name: upload
-      if: ${{ github.ref }} == "/refs/heads/master"
+      if: ${{ github.ref == '/refs/heads/master' }}
       run: |
         aws ecr get-login-password --region us-west-2 | docker login --username AWS --password-stdin 803688608479.dkr.ecr.us-west-2.amazonaws.com
         ./upload.sh