rgov · September 13, 2022 21:06 · Sep 13, 2022
diff --git a/Dockerfile b/Dockerfile
@@ -0,0 +1,46 @@
+# The apt repositories for ARM and Intel/AMD are hosted on different servers
+# (ports.ubuntu.com vs archive.ubuntu.com), which requires some finagling to get
+# apt's sources correct so we can install i386 packages regardless of our native
+# platform.
+#
+# There are no official i386 containers for Ubuntu 20.04 "Focal" and newer, so
+# we assume that we can use the amd64  
+ARG UBUNTU_VERSION=22.04
+FROM --platform=linux/amd64 ubuntu:${UBUNTU_VERSION} AS amd64-base
+
+
+ARG UBUNTU_VERSION
+FROM ubuntu:${UBUNTU_VERSION}
+
+# Copy the apt source list from the arm64 image, then patch it to use i386
+COPY --from=amd64-base /etc/apt/sources.list /etc/apt/sources.list.d/i386.list
+
+RUN sed -i -E -e 's/^deb /deb [arch=i386] /' /etc/apt/sources.list.d/i386.list \
+ && sed -i -E -e 's/^deb /deb [arch='"$(dpkg --print-architecture)"'] /' \
+        /etc/apt/sources.list
+
+# Install required packages
+RUN export DEBIAN_FRONTEND=noninteractive \
+ && dpkg --add-architecture i386 \
+ && apt update \
+ && apt install --no-install-recommends -y \
+        openbox \
+        winbind \
+        wine32:i386 \
+        wine-stable \
+        x11vnc \
+        xvfb \
+ && rm -rf /var/lib/apt/lists/*
+
+# Configure the virtual display port
+ENV DISPLAY :0
+
+# Configure WINE settings
+ENV WINEDEBUG -all
+ENV WINEPREFIX /wine/
+
+# Expose VNC port
+EXPOSE 5900
+
+COPY ./start.sh
+CMD [ "./start.sh" ]
diff --git a/README.md b/README.md
@@ -0,0 +1,5 @@
+It is challenging to build a multi-platform Docker container capable of running 32-bit Windows (x86) binaries under WINE.
+
+This Dockerfile shows one way to do so. The trick is to set up your apt source lists correctly, which is tricky to do if you are building on an ARM-based platform like a Rasberry Pi or Apple Silicon Mac.
+
+This image is based on Ubuntu 22.04, though it should work with other Ubuntu releases.
diff --git a/start.sh b/start.sh
@@ -0,0 +1,12 @@
+#!/bin/bash -eu
+
+VNC_PASSWORD=password
+
+# Start VNC
+# https://benjaminknofe.com/blog/2014/06/23/osx-compatible-x11vnc-start-up-command
+Xvfb :0 -screen 0 1024x768x24 & \
+    openbox & \
+    x11vnc -passwd "$VNC_PASSWORD" -q -forever -loop -shared &
+
+# Assuming you have copied ./foobar.exe to the container...
+wine ./foobar.exe