Add Dockerfile with builder image

.github/workflows/main.yaml

@@ -0,0 +1,26 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: mvukov/bazel-builder:commit-${{ github.sha }}

Dockerfile

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+FROM ubuntu:22.04
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+ARG BAZELISK_VER=1.17.0
+ARG GCC_VER=11
+ARG CLANG_VER=14
+
+RUN apt update && apt-get install -y \
+    clang-$CLANG_VER \
+    curl \
+    gcc-$GCC_VER \
+    g++-$GCC_VER \
+    libatomic1 \
+    python3
+
+RUN update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-$CLANG_VER 100 \
+    && update-alternatives --install /usr/bin/clang clang /usr/bin/clang-$CLANG_VER 100 \
+    && update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-$GCC_VER 100 \
+    && update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-$GCC_VER 100
+
+RUN curl -L "https://github.com/bazelbuild/bazelisk/releases/download/v${BAZELISK_VER}/bazelisk-linux-amd64" -o /usr/local/bin/bazelisk \
+    && chmod +x /usr/local/bin/bazelisk \
+    && ln -s /usr/local/bin/bazelisk /usr/local/bin/bazel
+
+# Based on https://code.visualstudio.com/remote/advancedcontainers/add-nonroot-user#_creating-a-nonroot-user
+ARG USERNAME=ci
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+RUN groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME
+
+USER $USERNAME