[CI] use ZMK's action

.gitea/workflows/build.yml

@@ -1,27 +1,91 @@
-on: [push, pull_request, workflow_dispatch]
+# https://github.com/zmkfirmware/zmk/blob/main/.github/workflows/build-user-config.yml
+name: Reusable user config build
 
-name: Build
-
-env:
-  ACTIONS_STEP_DEBUG: true
+on:
+  workflow_call:
+    inputs:
+      build_matrix_path:
+        description: "Path to the build matrix file"
+        default: "build.yaml"
+        required: false
+        type: string
+      config_path:
+        description: "Path to the config directory"
+        default: "config"
+        required: false
+        type: string
+      fallback_binary:
+        description: "Fallback binary format, if no *.uf2 file was built"
+        default: "bin"
+        required: false
+        type: string
+      archive_name:
+        description: "Archive output file name"
+        default: "firmware"
+        required: false
+        type: string
 
 jobs:
+  matrix:
+    runs-on: ubuntu-latest
+    name: Fetch Build Keyboards
+    outputs:
+      build_matrix: ${{ env.build_matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install yaml2json
+        run: python3 -m pip install remarshal
+
+      - name: Fetch Build Matrix
+        run: |
+          echo "build_matrix=$(yaml2json '${{ inputs.build_matrix_path }}' | jq -c .)" >> $GITHUB_ENV
+          yaml2json "${{ inputs.build_matrix_path }}" | jq
+
   build:
     runs-on: ubuntu-latest
     container:
       image: zmkfirmware/zmk-build-arm:stable
+    needs: matrix
     name: Build
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJson(needs.matrix.outputs.build_matrix) }}
     steps:
-      - name: Install Dependencies
+      - name: Prepare variables
+        shell: sh -x {0}
+        env:
+          shield: ${{ matrix.shield }}
         run: |
-          apt-get update;
-          apt-get install --yes --no-install-recommends nodejs ssh zip
+          echo "zephyr_version=${ZEPHYR_VERSION}" >> $GITHUB_ENV
+          echo "extra_cmake_args=${shield:+-DSHIELD=\"$shield\"}" >> $GITHUB_ENV
+          echo "display_name=${shield:+$shield - }${{ matrix.board }}" >> $GITHUB_ENV
+          echo "artifact_name=${shield:+$shield-}${{ matrix.board }}-zmk" >> $GITHUB_ENV
 
       - name: Checkout
         uses: actions/checkout@v3
 
+      - name: Cache west modules
+        uses: actions/cache@v3.0.11
+        continue-on-error: true
+        env:
+          cache_name: cache-zephyr-${{ env.zephyr_version }}-modules
+        with:
+          path: |
+            modules/
+            tools/
+            zephyr/
+            bootloader/
+            zmk/
+          key: ${{ runner.os }}-build-${{ env.cache_name }}-${{ hashFiles('**/west.yml', '**/build.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache_name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
       - name: West Init
-        run: west init -l config
+        run: west init -l "${{ inputs.config_path }}"
 
       - name: West Update
         run: west update
@@ -29,28 +93,27 @@ jobs:
       - name: West Zephyr export
         run: west zephyr-export
 
-      - name: West Build (Corne Left)
-        run: west build -s zmk/app -b nice_nano_v2 -- -DSHIELD=corne_left -DZMK_CONFIG="${GITHUB_WORKSPACE}/config"
+      - name: West Build (${{ env.display_name }})
+        shell: sh -x {0}
+        run: west build -s zmk/app -b "${{ matrix.board }}" -- -DZMK_CONFIG="${GITHUB_WORKSPACE}/${{ inputs.config_path }}" ${{ env.extra_cmake_args }} ${{ matrix.cmake-args }}
 
-      - name: Corne Left Kconfig file
-        run: cat build/zephyr/.config | grep -v "^#" | grep -v "^$"
+      - name: ${{ env.display_name }} Kconfig file
+        run: grep -v -e "^#" -e "^$" build/zephyr/.config | sort
 
-      - name: Rename zmk.uf2
-        run: cp build/zephyr/zmk.uf2 corne_left_nice_nano_v2.uf2
+      - name: Rename artifacts
+        shell: sh -x {0}
+        run: |
+          mkdir build/artifacts
+          if [ -f build/zephyr/zmk.uf2 ]
+          then
+            cp build/zephyr/zmk.uf2 "build/artifacts/${{ env.artifact_name }}.uf2"
+          elif [ -f build/zephyr/zmk.${{ inputs.fallback_binary }} ]
+          then
+            cp "build/zephyr/zmk.${{ inputs.fallback_binary }}" "build/artifacts/${{ env.artifact_name }}.${{ inputs.fallback_binary }}"
+          fi
 
-      - name: West Build (Corne Right)
-        run: west build --pristine -s zmk/app -b nice_nano_v2 -- -DSHIELD=corne_right -DZMK_CONFIG="${GITHUB_WORKSPACE}/config"
-
-      - name: Corne Right Kconfig file
-        run: cat build/zephyr/.config | grep -v "^#" | grep -v "^$"
-
-      - name: Rename zmk.uf2
-        run: cp build/zephyr/zmk.uf2 corne_right_nice_nano_v2.uf2
-
-      - name: Upload Artifacts
+      - name: Archive (${{ env.display_name }})
         uses: actions/upload-artifact@v3
         with:
-          name: firmware.zip
-          if-no-files-found: ignore
-          path: |
-            *.uf2
+          name: ${{ inputs.archive_name }}
+          path: build/artifacts