Pre-install go on the aarch64 wheel build image.

.github/workflows/test.yaml

@@ -372,10 +372,6 @@ jobs:
       run: 'echo TOOLCHAIN_AUTH_TOKEN="${{ secrets.TOOLCHAIN_AUTH_TOKEN }}" >> $GITHUB_ENV
 
         '
-    - name: Install Go
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.17.1
     - env:
         PANTS_CONFIG_FILES: +['pants.ci.toml','pants.ci.aarch64.toml']
       name: Build wheels

build-support/bin/generate_github_workflows.py

@@ -754,7 +754,7 @@ def build_wheels_job(platform: Platform, python_versions: list[str]) -> Jobs:
             "steps": initial_steps
             + [
                 setup_toolchain_auth(),
-                install_go(),
+                *([] if platform == Platform.LINUX_ARM64 else [install_go()]),
                 *helper.build_wheels(python_versions),
                 helper.upload_log_artifacts(name="wheels"),
                 deploy_to_s3(),

build-support/wheel_build_aarch64/Dockerfile

@@ -1,10 +1,18 @@
 # For manylinux compatibility, we build Linux wheels in a container rather than directly
-# on the CI runner. This adds the AWS CLI to the standard manylinux image, which we need
-# in order to publish built wheels to S3.
+# on the CI runner.
 FROM quay.io/pypa/manylinux2014_aarch64:2023-01-03-129be5e
 
+# Add the AWS CLI, which we need in order to publish built wheels to S3.
 RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-aarch64.zip" -o "awscliv2.zip" && \
     unzip awscliv2.zip && \
     ./aws/install && \
     rm -rf ./aws && \
     rm -f awscliv2.zip
+
+# The Go backend is enabled, we add a synthetic target for the Go SDK, which therefore
+# must be present even though wheel building does not need it.
+# TODO: Make the target generator lazy, so that unused tooling doesn't have to be present.
+RUN curl -LO "https://go.dev/dl/go1.17.1.linux-arm64.tar.gz" && \
+    tar -C /usr/local -xzf go1.17.1.linux-arm64.tar.gz
+
+ENV PATH="${PATH}:/usr/local/go/bin"