chore: add GCF buildpack integration test Workflow (#185)

See [functions-framework-conformance builidpack integration workflow PR](GoogleCloudPlatform/functions-framework-conformance#99) for more information.
GoogleCloudPlatform · Apr 29, 2022 · 6c9ce8c · 6c9ce8c
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diff --git a/.github/workflows/buildpack-integration-test.yml b/.github/workflows/buildpack-integration-test.yml
@@ -0,0 +1,52 @@
+# Validates Functions Framework with GCF buildpacks.
+name: Buildpack Integration Test
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+jobs:
+  python37:
+    uses: GoogleCloudPlatform/functions-framework-conformance/.github/workflows/[email protected]
+    with:
+      http-builder-source: 'tests/conformance'
+      http-builder-target: 'write_http_declarative'
+      cloudevent-builder-source: 'tests/conformance'
+      cloudevent-builder-target: 'write_cloud_event_declarative'
+      prerun: 'tests/conformance/prerun.sh ${{ github.sha }}'
+      builder-runtime: 'python37'
+      # Latest uploaded tag from us.gcr.io/fn-img/buildpacks/python37/builder
+      builder-tag: 'python37_20220426_3_7_12_RC00'
+  python38:
+    uses: GoogleCloudPlatform/functions-framework-conformance/.github/workflows/[email protected]
+    with:
+      http-builder-source: 'tests/conformance'
+      http-builder-target: 'write_http_declarative'
+      cloudevent-builder-source: 'tests/conformance'
+      cloudevent-builder-target: 'write_cloud_event_declarative'
+      prerun: 'tests/conformance/prerun.sh ${{ github.sha }}'
+      builder-runtime: 'python38'
+      # Latest uploaded tag from us.gcr.io/fn-img/buildpacks/python38/builder
+      builder-tag: 'python38_20220426_3_8_12_RC00'
+  python39:
+    uses: GoogleCloudPlatform/functions-framework-conformance/.github/workflows/[email protected]
+    with:
+      http-builder-source: 'tests/conformance'
+      http-builder-target: 'write_http_declarative'
+      cloudevent-builder-source: 'tests/conformance'
+      cloudevent-builder-target: 'write_cloud_event_declarative'
+      prerun: 'tests/conformance/prerun.sh ${{ github.sha }}'
+      builder-runtime: 'python39'
+      # Latest uploaded tag from us.gcr.io/fn-img/buildpacks/python39/builder
+      builder-tag: 'python39_20220426_3_9_10_RC00'
+  python310:
+    uses: GoogleCloudPlatform/functions-framework-conformance/.github/workflows/[email protected]
+    with:
+      http-builder-source: 'tests/conformance'
+      http-builder-target: 'write_http_declarative'
+      cloudevent-builder-source: 'tests/conformance'
+      cloudevent-builder-target: 'write_cloud_event_declarative'
+      prerun: 'tests/conformance/prerun.sh ${{ github.sha }}'
+      builder-runtime: 'python310'
+      # Latest uploaded tag from us.gcr.io/fn-img/buildpacks/python310/builder
+      builder-tag: 'python310_20220320_3_10_2_RC00'
diff --git a/tests/conformance/prerun.sh b/tests/conformance/prerun.sh
@@ -0,0 +1,21 @@
+# prerun.sh sets up the test function to use the functions framework commit
+# specified by generating a `requirements.txt`. This makes the function `pack` buildable
+# with GCF buildpacks.
+#
+# `pack` command example:
+# pack build python-test --builder us.gcr.io/fn-img/buildpacks/python310/builder:python310_20220320_3_10_2_RC00 --env GOOGLE_RUNTIME=python310 --env GOOGLE_FUNCTION_TARGET=write_http_declarative
+set -e
+
+FRAMEWORK_VERSION=$1
+if [ -z "${FRAMEWORK_VERSION}" ]
+    then
+        echo "Functions Framework version required as first parameter"
+        exit 1
+fi
+
+SCRIPT_DIR=$(realpath $(dirname $0))
+
+cd $SCRIPT_DIR
+
+echo "git+https://github.com/GoogleCloudPlatform/functions-framework-python@$FRAMEWORK_VERSION#egg=functions-framework" > requirements.txt
+cat requirements.txt