Refactor Dockerfile to install bazelisk and remove Bazel source download steps

Signed-off-by: Matthieu MOREL <[email protected]>

Author: mmorel-35

bazel/external/Dockerfile.bazel

@@ -65,23 +65,14 @@ RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends $DEPS && \
     rm -rf /var/lib/apt/lists/*
 
-# Set working directory for Bazel build
-WORKDIR /root/bazel
+# Install bazelisk and set Bazel version
+ARG BAZELISK_VERSION=v1.20.0
+RUN curl -L -o /usr/local/bin/bazelisk "https://github.com/bazelbuild/bazelisk/releases/download/${BAZELISK_VERSION}/bazelisk-linux-$(uname -m)" \
+    && chmod +x /usr/local/bin/bazelisk \
+    && ln -s /usr/local/bin/bazelisk /usr/local/bin/bazel
 
+# Set Bazel version for bazelisk
+ENV USE_BAZEL_VERSION=7.7.1
 
-# Download Bazel source and remove zip immediately after extraction
-ARG BAZEL_VERSION=7.7.1
-RUN curl -LO https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-dist.zip && \
-    unzip -q bazel-${BAZEL_VERSION}-dist.zip && \
-    rm -f bazel-${BAZEL_VERSION}-dist.zip
-
-## Build Bazel and copy the binary
-# NOTE: This step is flaky and may hang for multiarch/buildx.
-# If it takes more than 2 hours, restart the Docker build.
-ENV EXTRA_BAZEL_ARGS="--tool_java_runtime_version=local_jdk"
-RUN ./compile.sh && \
-    mv /output/bazel /usr/bin/bazel && \
-    rm -rf /root/bazel
-
-# Ensure a valid working directory after build
+# Set a valid working directory
 WORKDIR /root