From 41fb394b00f91a40bce4cb26dc2531c513166fcf Mon Sep 17 00:00:00 2001
From: jimsihk <99048231+jimsihk@users.noreply.github.com>
Date: Sat, 8 Apr 2023 14:37:58 +0800
Subject: [PATCH] Fix iconv compatibility issue on Alpine (#47)

https://github.com/erseco/alpine-moodle/issues/26
---
 Dockerfile | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 8c370483c..e3d459c19 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,15 @@
 ARG ARCH=
+FROM ${ARCH}alpine:3.17.3 as build
+
+# renovate: datasource=repology depName=alpine_3_13/gnu-libiconv versioning=loose
+ARG GNU_LIBICONV_VERSION="=1.15-r3"
+
+RUN apk --no-cache add \
+# Workaround for using gnu-iconv instead of iconv in PHP on Alpine
+# https://github.com/docker-library/php/issues/240#issuecomment-876464325
+      --repository http://dl-cdn.alpinelinux.org/alpine/v3.13/community/ \
+        gnu-libiconv${GNU_LIBICONV_VERSION}
+
 FROM ${ARCH}alpine:3.17.3
 
 LABEL Maintainer="99048231+jimsihk@users.noreply.github.com" \
@@ -86,11 +97,16 @@ RUN apk --no-cache add \
     && rm -rf /var/cache/apk/* \
 # Remove default server definition
     && rm /etc/nginx/http.d/default.conf \
-# Make sure files/folders needed by the processes are accessable when they run under the nobody user
+# Make sure files/folders needed by the processes are accessible when they run under the nobody user
     && chown -R nobody.nobody /run \
     && chown -R nobody.nobody /var/lib/nginx \
     && chown -R nobody.nobody /var/log/nginx
 
+# Workaround for using gnu-iconv instead of iconv in PHP on Alpine
+# https://github.com/docker-library/php/issues/240#issuecomment-876464325
+COPY --from=build /usr/lib/preloadable_libiconv.so /usr/lib/preloadable_libiconv.so
+ENV LD_PRELOAD /usr/lib/preloadable_libiconv.so
+
 # Add configuration files
 COPY --chown=nobody rootfs/ /