Move CI to GitHub Actions

Author: yodaldevoid

.github/workflows/build-images.yml

@@ -0,0 +1,51 @@
+name: Build Docker Images
+
+on: [push, pull_request]
+
+jobs:
+  build-images:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        include:
+#VERSIONS
+          - variant: buster
+            os: ubuntu-18.04
+            version: 1.50.0
+          - variant: buster/slim
+            os: ubuntu-18.04
+            version: 1.50.0
+          - variant: alpine3.12
+            os: ubuntu-18.04
+            version: 1.50.0
+          - variant: alpine3.13
+            os: ubuntu-18.04
+            version: 1.50.0
+          - variant: windowsservercore-1809/msvc
+            os: windows-2019
+            version: 1.50.0
+#VERSIONS
+
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ github.ref }}
+      - name: Check out Docker official images repo
+        uses: actions/checkout@v2
+        with:
+          repository: docker-library/official-images
+          path: official-images
+      - name: Build and test docker image
+        shell: bash
+        env:
+          VERSION: ${{ matrix.version }}
+          VARIANT: ${{ matrix.variant }}
+        run: |
+          env | sort
+          cd "${VERSION}/${VARIANT}"
+          slash='/'; image="rust:${VERSION}-${VARIANT//$slash/-}"
+          docker build -t "$image" .
+          ${GITHUB_WORKSPACE}/official-images/test/run.sh "$image"
+          docker images

.travis.yml

@@ -124,17 +124,30 @@ def update_windows():
             .replace("%%RUSTUP-SHA256%%", rustup_hash_windows("x86_64-pc-windows-msvc"))
         write_file(f"{rust_version}/windowsservercore-{version}/msvc/Dockerfile", rendered)
 
-def update_travis():
-    file = ".travis.yml"
+def update_github_actions():
+    file = ".github/workflows/build-images.yml"
     config = read_file(file)
 
     versions = ""
     for variant in debian_variants:
-        versions += f"  - VERSION={rust_version} VARIANT={variant}\n"
-        versions += f"  - VERSION={rust_version} VARIANT={variant}/slim\n"
+        versions += f"          - variant: {variant}\n"
+        versions += f"            os: ubuntu-18.04\n"
+        versions += f"            version: {rust_version}\n"
+
+        versions += f"          - variant: {variant}/slim\n"
+        versions += f"            os: ubuntu-18.04\n"
+        versions += f"            version: {rust_version}\n"
 
     for version in alpine_versions:
-        versions += f"  - VERSION={rust_version} VARIANT=alpine{version}\n"
+        versions += f"          - variant: alpine{version}\n"
+        versions += f"            os: ubuntu-18.04\n"
+        versions += f"            version: {rust_version}\n"
+
+    for version, build in windows_servercore_versions:
+        versions += f"          - variant: windowsservercore-{version}/msvc\n"
+        versions += f"            os: windows-2019\n"
+        versions += f"            version: {rust_version}\n"
+
 
     marker = "#VERSIONS\n"
     split = config.split(marker)
@@ -232,8 +245,8 @@ def usage():
     if task == "update":
         update_debian()
         update_alpine()
-        update_travis()
         update_windows()
+        update_github_actions()
     elif task == "generate-stackbrew-library":
         generate_stackbrew_library()
     else: