build-scx-scheds: Add a container image with system deps

Signed-off-by: Ihor Solodrai <[email protected]>

Author: theihor

.github/workflows/build-scx-builder.yaml

@@ -0,0 +1,46 @@
+name: Build scx-builder
+description: |
+  This workflow builds a ./build-scx-scheds/Dockerfile docker image,
+  which can be used for sched-ext build.
+  It is pushed to 'ghcr.io/libbpf/scx-builder'
+
+on:
+  pull_request:
+    paths:
+      - 'ci/build-scx-scheds/**'
+  push:
+    paths:
+      - 'ci/build-scx-scheds/**'
+  schedule:
+    - cron: '0 0 * * 0'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository_owner }}/scx-builder
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Log in to Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: ci/build-scx-scheds
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
+

build-scx-scheds/Dockerfile

@@ -0,0 +1,7 @@
+FROM ubuntu:24.04
+
+RUN apt-get update -y && apt-get install -y --no-install-recommends sudo
+
+COPY install-dependencies.sh /tmp/install-dependencies.sh
+RUN /tmp/install-dependencies.sh
+