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feat: support ARM64 hosts in cross-compiler Docker image

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Add TARGETARCH detection to download the correct Zig binary for
the host architecture (aarch64 vs x86_64). This enables native
performance on Apple Silicon Macs instead of requiring emulation.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Lea Anthony 2026-01-27 06:32:47 +11:00
commit f91b8cfeb1
1 changed files with 9 additions and 3 deletions
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12
v3/internal/commands/build_assets/docker/Dockerfile.cross
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@ -1,6 +1,7 @@
# Cross-compile Wails v3 apps to any platform
#
# Uses Zig as C compiler + macOS SDK for darwin targets
# Supports both amd64 and arm64 host architectures
#
# Usage:
# docker build -t wails-cross -f Dockerfile.cross .
@ -10,16 +11,21 @@
# docker run --rm -v $(pwd):/app wails-cross linux arm64
# docker run --rm -v $(pwd):/app wails-cross windows amd64
# docker run --rm -v $(pwd):/app wails-cross windows arm64
#
# Multi-arch build:
# docker buildx build --platform linux/amd64,linux/arm64 -t wails-cross -f Dockerfile.cross .
FROM golang:1.25-alpine
RUN apk add --no-cache curl xz nodejs npm
# Install Zig
# Install Zig - automatically selects correct binary for host architecture
ARG ZIG_VERSION=0.14.0
RUN curl -L "https://ziglang.org/download/${ZIG_VERSION}/zig-linux-x86_64-${ZIG_VERSION}.tar.xz" \
ARG TARGETARCH
RUN ZIG_ARCH=$(case "${TARGETARCH}" in arm64) echo "aarch64" ;; *) echo "x86_64" ;; esac) && \
curl -L "https://ziglang.org/download/${ZIG_VERSION}/zig-linux-${ZIG_ARCH}-${ZIG_VERSION}.tar.xz" \
| tar -xJ -C /opt \
&& ln -s /opt/zig-linux-x86_64-${ZIG_VERSION}/zig /usr/local/bin/zig
&& ln -s /opt/zig-linux-${ZIG_ARCH}-${ZIG_VERSION}/zig /usr/local/bin/zig
# Download macOS SDK (required for darwin targets)
ARG MACOS_SDK_VERSION=14.5