Fix build failure (#256)

- No point in fixing the Kafka Authorizer build as it's a deprecated module.
- Remove custom OPA download script and use setup-opa
- Use latest Go and latest OPA versions

Signed-off-by: Anders Eknert <[email protected]>

Author: anderseknert

.github/workflows/build.yaml

@@ -9,21 +9,23 @@ on:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: Check out code
       uses: actions/checkout@v4
 
     - name: Install Go
       uses: actions/setup-go@v5
       with:
-        go-version: '^1.15.5'
+        go-version: '^1.22.5'
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
 
     - name: Install OPA
-      run: ./build/install-opa.sh
+      uses: open-policy-agent/setup-opa@v2
+      with:
+        version: v0.66.0
 
     - name: Make build
       run: PATH=$PATH:$PWD:/home/runner/.local/bin make build

build/install-opa.sh

@@ -1,3 +1,6 @@
+# Since this is a deprecated contrib module, this is not built as part of the main
+# build process, and this file is here only for historical purposes.
+
 VERSION := $(shell ./scripts/get-version.sh)
 REPOSITORY := openpolicyagent/demo-kafka