From f257bd3cb7460aa2c9572b8f29732d2ad3cf172f Mon Sep 17 00:00:00 2001
From: Simon Frei <freisim93@gmail.com>
Date: Fri, 14 Jul 2023 21:14:25 +0200
Subject: [PATCH] Add GHA workflow to build the builder image

---
 .github/workflows/build.yaml                  | 18 +++++++++
 .github/workflows/image-builder-template.yaml | 40 +++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 .github/workflows/build.yaml
 create mode 100644 .github/workflows/image-builder-template.yaml

diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
new file mode 100644
index 000000000..fc9e119da
--- /dev/null
+++ b/.github/workflows/build.yaml
@@ -0,0 +1,18 @@
+name: Build/Release
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build-image:
+    if: github.event_name == 'pull_request'
+    uses: ./.github/workflows/image-builder-template.yaml
+    with:
+      push: false
+
+  push-image:
+    if: github.event_name == 'workflow_dispatch'
+    uses: ./.github/workflows/image-builder-template.yaml
+    with:
+      push: true
diff --git a/.github/workflows/image-builder-template.yaml b/.github/workflows/image-builder-template.yaml
new file mode 100644
index 000000000..fe6dfe252
--- /dev/null
+++ b/.github/workflows/image-builder-template.yaml
@@ -0,0 +1,40 @@
+name: Image Builder Template
+
+on:
+  workflow_call:
+    inputs:
+      push:
+        required: true
+        type: boolean
+
+env:
+  # Our build metadata
+  BUILD_USER: builder
+  BUILD_HOST: github.syncthing.net
+  # template var
+  image: ghcr.io/syncthing/syncthing-android-builder
+
+jobs:
+  build-image:
+    name: Build Builder Docker
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      - uses: docker/setup-buildx-action@v2
+
+      - uses: docker/login-action@v2
+        if: ${{ inputs.push }}
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./docker/Dockerfile
+          tags: '${{ env.image }}:latest,${{ env.image }}:${{ github.sha }}'
+          push: ${{ inputs.push }}