Improve application previews by preventing naming collision (#36)

* make ephemeral instance deployment smart, by checking for existing instances

* add more echoes

* update shutdown

* remove debug output

* remove even more debug output

* add -n to echo command

---------

Co-authored-by: lukqw <lukqw@users.noreply.github.com>

Author: lukqw

ephemeral/shutdown/action.yml

@@ -22,18 +22,24 @@ runs:
       shell: bash
       run: echo "pr_id=$(<pr-id.txt)" >> $GITHUB_OUTPUT
 
-    - name: Shutdown ephemeral instance
+    - name: Setup preview name
       shell: bash
       run: |
         prId=$(<pr-id.txt)
-        # TODO: make preview_name configurable
-        previewName=preview-$prId
+        repoName=$GITHUB_REPOSITORY
+        repoNameCleaned=$(echo -n "$repoName" | tr -c '[:alnum:]' '-')
+        previewName=preview-$repoNameCleaned-$prId
+        echo "previewName=$previewName" >> $GITHUB_ENV
 
+    - name: Shutdown ephemeral instance
+      shell: bash
+      run: |
         response=$(curl -X DELETE \
+            -s -o /dev/null -w "%{http_code}" \
             -H "ls-api-key: ${LOCALSTACK_API_KEY:-${{ inputs.localstack-api-key }}}" \
             -H "content-type: application/json" \
             https://api.localstack.cloud/v1/compute/instances/$previewName)
-        if [[ "$response" != "{}" ]]; then
+        if [[ "$response" -ne 200 ]]; then
           # In case the deletion fails, e.g. if the instance cannot be found, we raise a proper error on the platform
           echo "Unable to delete preview environment. API response: $response"
           exit 1

ephemeral/startup/action.yml

@@ -55,17 +55,36 @@ runs:
       with:
         name: pr
 
-    - name: Create preview environment
+    - name: Setup preview name
       shell: bash
       run: |
         prId=$(<pr-id.txt)
-        # TODO: make preview name configurable!
-        previewName=preview-$prId
+        repoName=$GITHUB_REPOSITORY
+        repoNameCleaned=$(echo -n "$repoName" | tr -c '[:alnum:]' '-')
+        previewName=preview-$repoNameCleaned-$prId
+        echo "previewName=$previewName" >> $GITHUB_ENV
 
+    - name: Create preview environment
+      shell: bash
+      run: |
         autoLoadPod="${AUTO_LOAD_POD:-${{ inputs.auto-load-pod }}}"
         extensionAutoInstall="${EXTENSION_AUTO_INSTALL:-${{ inputs.extension-auto-install }}}"
         lifetime="${{ inputs.lifetime }}"
 
+        list_response=$(curl -X GET \
+            -H "ls-api-key: ${LOCALSTACK_API_KEY:-${{ inputs.localstack-api-key }}}" \
+            -H "content-type: application/json" \
+            https://api.localstack.cloud/v1/compute/instances)
+
+        instance_exists=$(echo "$list_response" | jq --arg NAME "$previewName" '.[] | select(.instance_name == $NAME)')
+
+        if [ -n "$instance_exists" ]; then
+          del_response=$(curl -X DELETE \
+            -H "ls-api-key: ${LOCALSTACK_API_KEY:-${{ inputs.localstack-api-key }}}" \
+            -H "content-type: application/json" \
+            https://api.localstack.cloud/v1/compute/instances/$previewName)
+        fi
+
         response=$(curl -X POST -d "{\"instance_name\": \"${previewName}\", \"lifetime\": ${lifetime} ,\"env_vars\": {\"AUTO_LOAD_POD\": \"${autoLoadPod}\", \"EXTENSION_AUTO_INSTALL\": \"${extensionAutoInstall}\"}}"\
             -H "ls-api-key: ${LOCALSTACK_API_KEY:-${{ inputs.localstack-api-key }}}" \
             -H "content-type: application/json" \