From e79397fdd1fe8f3ef7073782d53883632abce9f5 Mon Sep 17 00:00:00 2001
From: Andrew Mayorov <encube.ul@gmail.com>
Date: Wed, 3 Aug 2022 12:06:12 +0300
Subject: [PATCH] Speed up multiarch image builds under GH Actions

---
 .github/workflows/build-image.yml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/.github/workflows/build-image.yml b/.github/workflows/build-image.yml
index ff53b0e..96df5c5 100644
--- a/.github/workflows/build-image.yml
+++ b/.github/workflows/build-image.yml
@@ -15,6 +15,16 @@ jobs:
   build-push:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v3
+      # Precompile applications under `prod` profile
+      - run: rebar3 as prod compile
+      # Clean out those applications that MUST be compiled on the target system:
+      # 1. Applications that employ native code in the form of NIFs or port drivers.
+      - run: >
+          for app in $(grep -Rl -F 'port_specs' _build/prod/lib/*/rebar.config | cut -d'/' -f4)
+          do
+            rebar3 as prod clean --apps $app
+          done
       - uses: valitydev/action-deploy-docker@v2
         with:
           registry-username: ${{ github.actor }}