From 1b6989b5d9b9e54e99822cd024b0c00e615e3d98 Mon Sep 17 00:00:00 2001
From: Nathan Coad <nathan@thecoads.com>
Date: Thu, 19 Feb 2026 13:21:18 +1100
Subject: [PATCH] feat: Add multi-platform support and experimental features to
 Docker build

---
 .drone.yml |  6 ++++++
 Dockerfile | 10 ++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/.drone.yml b/.drone.yml
index 4f1f61e..37bad0c 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -47,6 +47,8 @@ steps:
       registry: registry.coadcorp.com
       repo: registry.coadcorp.com/nathan/invertergui
       dockerfile: Dockerfile
+      platform: linux/amd64,linux/arm64
+      experimental: true
       buildx_options_semicolon: --platform=linux/amd64,linux/arm64;--provenance=false
       username: nathan
       password:
@@ -63,6 +65,8 @@ steps:
       registry: registry.coadcorp.com
       repo: registry.coadcorp.com/nathan/invertergui
       dockerfile: Dockerfile
+      platform: linux/amd64,linux/arm64
+      experimental: true
       buildx_options_semicolon: --platform=linux/amd64,linux/arm64;--provenance=false
       username: nathan
       password:
@@ -82,6 +86,8 @@ steps:
       registry: registry.coadcorp.com
       repo: registry.coadcorp.com/nathan/invertergui
       dockerfile: Dockerfile
+      platform: linux/amd64,linux/arm64
+      experimental: true
       buildx_options_semicolon: --platform=linux/amd64,linux/arm64;--provenance=false
       username: nathan
       password:
diff --git a/Dockerfile b/Dockerfile
index 34a3b31..78b9e0b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,15 @@
-FROM golang:1.26-alpine as builder
+FROM --platform=$BUILDPLATFORM golang:1.26-alpine as builder
+
+ARG TARGETOS=linux
+ARG TARGETARCH
+ARG TARGETVARIANT
 
 RUN mkdir /build
 COPY . /build/
 WORKDIR /build
-RUN CGO_ENABLED=0 go build -o invertergui ./cmd/invertergui
+RUN set -eux; \
+    GOARM="${TARGETVARIANT#v}"; \
+    CGO_ENABLED=0 GOOS="${TARGETOS}" GOARCH="${TARGETARCH}" GOARM="${GOARM}" go build -o invertergui ./cmd/invertergui
 
 FROM scratch