NEW: Prototype Docker image for Windows

.github/workflows/ci.yaml

@@ -318,3 +318,48 @@ jobs:
           DH_PASSWORD: ${{ secrets.DH_PASSWORD }}
         run: |
           ./scripts/deploy
+
+  build_win:
+    name: ${{ matrix.cfg.DOCKERIMAGE }}:${{ matrix.cfg.DOCKERTAG }}
+      runs-on: windows-2019
+      strategy:
+        fail-fast: false
+        matrix:
+          cfg:
+          - DOCKERIMAGE: win-anvil-x86_64
+            DOCKERTAG: "15"
+            VS_MAJOR: "15"
+          - DOCKERIMAGE: win-anvil-x86_64
+            DOCKERTAG: "16"
+            VS_MAJOR: "16"
+          - DOCKERIMAGE: win-anvil-x86_64
+            DOCKERTAG: "17"
+            VS_MAJOR: "17"
+
+    env:
+      DOCKERIMAGE: ${{ matrix.cfg.DOCKERIMAGE }}
+      DOCKERTAG: ${{ matrix.cfg.DOCKERTAG }}
+      VS_MAJOR: ${{ matrix.cfg.VS_MAJOR }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Docker info
+        run: |
+          docker info
+
+      - name: Build image
+        run: |
+          docker build \
+            --build-arg VS_MAJOR=%VS_MAJOR% \
+            -t condaforge/%DOCKERIMAGE%:%DOCKERTAG% \
+            -f %DOCKERIMAGE%/Dockerfile \
+            .
+
+      - name: Deploy
+        if: github.ref == 'refs/heads/main' && github.repository == 'conda-forge/docker-images'
+        env:
+          CFD_QUAY_PASSWORD: ${{ secrets.CFD_QUAY_PASSWORD }}
+          DH_PASSWORD: ${{ secrets.DH_PASSWORD }}
+        run: |
+          ./scripts/deploy.bat

win-anvil-x86_64/Dockerfile

@@ -0,0 +1,57 @@
+# This docker image is cached on Azure's 2019 VMs
+# https://github.com/actions/virtual-environments/blob/main/images/win/Windows2019-Readme.md
+FROM mcr.microsoft.com/windows/servercore:ltsc2019
+
+SHELL ["cmd", "/S", "/C"]
+
+WORKDIR C:/Users/Administrator
+
+RUN powershell -Command " \
+    $url = \"https://repo.continuum.io/miniconda/Miniconda3-latest-Windows-x86_64.exe\"; \
+    $client = new-object System.Net.WebClient; \
+    $client.DownloadFile( $url, \"miniconda3.exe\"); \
+    ./miniconda3.exe /S /D=C:\Users\Administrator\miniconda3 | Write-Output; \
+    del miniconda3.exe; \
+    ./miniconda3/Scripts/conda clean --all -y; \
+    "
+
+RUN miniconda3\Scripts\activate.bat && \
+    conda config --add channels conda-forge && \
+    conda config --remove channels defaults && \
+    conda install -y conda-build git mamba boa && \
+    conda config --set always_yes true && \
+    conda config --set anaconda_upload false && \
+    conda update --all -n base --yes && \
+    conda clean --all --yes
+
+CMD cmd.exe /k miniconda3\Scripts\activate.bat
+
+ARG VS_MAJOR="16"
+ENV VS_MAJOR=$VS_MAJOR
+
+# Put the Visual Studio layer last because it is the most annoying to redo.
+# Be patient, this takes quite a while and you see no action.
+# Component names are documented here:
+# https://docs.microsoft.com/en-us/visualstudio/install/workload-component-id-vs-build-tools
+# https://docs.microsoft.com/en-us/visualstudio/install/use-command-line-parameters-to-install-visual-studio?view=vs-2017
+RUN powershell -Command " \
+    $url = \"https://aka.ms/vs/$env:VS_MAJOR/release/vs_buildtools.exe\"; \
+    $client = new-object System.Net.WebClient; \
+    $client.DownloadFile( $url, \"msvc_build_tools.exe\"); \
+    ./msvc_build_tools.exe --quiet --wait --nocache \
+    --add Microsoft.Component.MSBuild \
+    --add Microsoft.VisualStudio.Component.CoreBuildTools \
+    --add Microsoft.VisualStudio.Component.Roslyn.Compiler \
+    --add Microsoft.VisualStudio.Component.Static.Analysis.Tools \
+    --add Microsoft.VisualStudio.Component.VC.CMake.Project \
+    --add Microsoft.VisualStudio.Component.VC.CoreBuildTools \
+    --add Microsoft.VisualStudio.Component.VC.Redist.14.Latest \
+    --add Microsoft.VisualStudio.Component.VC.Tools.x86.x64 \
+    --add Microsoft.VisualStudio.Component.Windows10SDK \
+    --add Microsoft.VisualStudio.Workload.MSBuildTools \
+    --add Microsoft.VisualStudio.Workload.VCTools \
+    | Write-Output; \
+    Start-Sleep -s 20; \
+    del msvc_build_tools.exe; \
+    Remove-Item $env:TEMP\* -Recurse; \
+    "