From ffd6a64ce9e4bd9a05b81f08fb897a1420ab8d3e Mon Sep 17 00:00:00 2001
From: "James R. Barlow" <james@purplerock.ca>
Date: Mon, 9 Oct 2023 17:34:28 -0700
Subject: [PATCH] Attempt at alpine on arm64 - not working

pip attempts to download musllinux_1_1 wheels and can't find pikepdf's which is only 1_2. Not clear how to fix.
---
 .docker/Dockerfile.alpine | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/.docker/Dockerfile.alpine b/.docker/Dockerfile.alpine
index a4e66e633..f513831f6 100644
--- a/.docker/Dockerfile.alpine
+++ b/.docker/Dockerfile.alpine
@@ -18,6 +18,22 @@ RUN apk add --no-cache \
     python3-dev \
     py3-pip
 
+# On arm64, we need to build cffi from source.
+ARG TARGETPLATFORM
+
+RUN if [ "${TARGETPLATFORM}" == "linux/arm64" ]; then \
+    apk add --no-cache \
+    build-base \
+    autoconf \
+    automake \
+    libtool \
+    zlib-dev \
+    libffi-dev \
+    cairo-dev \
+    pkgconfig \
+    ;  \
+    fi
+
 COPY . /app
 
 WORKDIR /app