exit early if no samples changed

Author: jordanstephens

.github/workflows/deploy-changed-samples.yml

@@ -37,8 +37,12 @@ jobs:
             | uniq \
             | while read -r dir; do [ -d "$dir" ] && echo "$dir"; done > changed_samples.txt
           if [ ! -s changed_samples.txt ]; then
+            echo "should_continue=false" >> $GITHUB_ENV
             echo "No samples have changed. Exiting..."
-            exit 0
+          else
+            echo "should_continue=true" >> $GITHUB_ENV
+            echo "The following samples have changed:"
+            cat changed_samples.txt
           fi
 
       - name: Install Golang
@@ -47,20 +51,24 @@ jobs:
           go-version-file: tools/testing/go.mod
           cache-dependency-path: |
             tools/testing/go.sum
+        if: env.should_continue == 'true'
 
       - name: Build the test tool using Go
         run: |
           go mod tidy
           go build ./cmd/loadtest
         working-directory: tools/testing/
+        if: env.should_continue == 'true'
 
       - name: Install Defang
         run: |
           eval "$(curl -fsSL s.defang.io/install)"
+        if: env.should_continue == 'true'
 
       - name: Run tests
         id: run-tests
         shell: bash # implies set -o pipefail, so pipe below will keep the exit code from loadtest
+        if: env.should_continue == 'true'
         env:
           FIXED_VERIFIER_PK: ${{ secrets.FIXED_VERIFIER_PK }}
           TEST_AWS_ACCESS_KEY: ${{ secrets.TEST_AWS_ACCESS_KEY }}
@@ -104,7 +112,7 @@ jobs:
 
       - name: Upload Output as Artifact
         uses: actions/upload-artifact@v4
-        if: success() || steps.run-tests.outcome == 'failure' # Always upload result unless cancelled
+        if: env.should_continue == 'true' && (success() || steps.run-tests.outcome == 'failure') # Always upload result unless cancelled
         with:
           name: program-output
           path: output/**