Build firmware locally with docker

.github/workflows/build.yml

@@ -1,5 +0,0 @@
-on: [push, pull_request, workflow_dispatch]
-
-jobs:
-  build:
-    uses: zmkfirmware/zmk/.github/workflows/build-user-config.yml@main

.gitignore

@@ -0,0 +1 @@
+out/

Dockerfile

@@ -0,0 +1,18 @@
+from zmkfirmware/zmk-build-arm:stable
+
+workdir /build
+run mkdir config
+copy ./config/west.yml ./config/
+
+run west init -l /build/config/
+run west update
+run west zephyr-export
+
+copy ./config/ ./config
+
+run west build -s zmk/app -b nice_nano_v2 -d build_left -- -DMZK_CONFIG=/build/config -DSHIELD=corne_left
+run west build -s zmk/app -b nice_nano_v2 -d build_right -- -DMZK_CONFIG=/build/config -DSHIELD=corne_right
+
+run mkdir -p out
+run mv build_left/zephyr/zmk.uf2 ./out/corne_left-nice_nano_v2-zmk.uf2
+run mv build_right/zephyr/zmk.uf2 ./out/corne_right-nice_nano_v2-zmk.uf2

build.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -e
+
+echo "Building keymap"
+docker build .
+
+if [ -d out ]; then
+  echo "Removing old keymap files"
+  rm -r out
+fi
+
+mkdir -p out
+
+echo "Copying keymap files out of docker"
+docker run -it \
+  --mount type=bind,source="$(pwd)/out",target=/out \
+  $(docker build . -q) \
+  bash -c 'cp ./out/* /out/'

build.yaml

@@ -1,19 +0,0 @@
-# This file generates the GitHub Actions matrix
-# For simple board + shield combinations, add them
-# to the top level board and shield arrays, for more
-# control, add individual board + shield combinations to
-# the `include` property, e.g:
-#
-# board: [ "nice_nano_v2" ]
-# shield: [ "corne_left", "corne_right" ]
-# include:
-#   - board: bdn9_rev2
-#   - board: nice_nano_v2
-#     shield: reviung41
-#
----
-include:
-  - board: nice_nano_v2
-    shield: corne_left
-  - board: nice_nano_v2
-    shield: corne_right