Docker: support native unrar building (#231)

docker/Dockerfile

@@ -4,6 +4,7 @@ FROM alpine:3.19.1 AS build
 # args
 ARG NZBGET_RELEASE=develop
 ARG UNRAR_VERSION=7.0.7
+ARG UNRAR_NATIVE=false
 ARG MAKE_JOBS=1
 ARG TARGETPLATFORM
 
@@ -48,9 +49,12 @@ RUN \
   curl -o /tmp/unrar.tar.gz -L "https://www.rarlab.com/rar/unrarsrc-${UNRAR_VERSION}.tar.gz" && \  
   tar xf /tmp/unrar.tar.gz -C /tmp/unrar --strip-components=1 && \
   cd /tmp/unrar && \
-  if [ "${TARGETPLATFORM}" == "linux/amd64" ]; then sed -i "s|CXXFLAGS=-march=native|CXXFLAGS=-march=x86-64-v2|" makefile; fi && \
-  if [ "${TARGETPLATFORM}" == "linux/arm64" ]; then sed -i "s|CXXFLAGS=-march=native|CXXFLAGS=-march=armv8-a|" makefile; fi && \
-  if [ "${TARGETPLATFORM}" == "linux/arm/v7" ]; then sed -i "s|CXXFLAGS=-march=native|CXXFLAGS=-march=armv7-a|" makefile; fi && \
+  if [ "${UNRAR_NATIVE}" != "true" ] && [ "${TARGETPLATFORM}" == "linux/amd64" ]; \
+    then sed -i "s|CXXFLAGS=-march=native|CXXFLAGS=-march=x86-64-v2|" makefile; fi && \
+  if [ "${UNRAR_NATIVE}" != "true" ] && [ "${TARGETPLATFORM}" == "linux/arm64" ]; \
+    then sed -i "s|CXXFLAGS=-march=native|CXXFLAGS=-march=armv8-a|" makefile; fi && \
+  if [ "${UNRAR_NATIVE}" != "true" ] && [ "${TARGETPLATFORM}" == "linux/arm/v7" ]; \
+    then sed -i "s|CXXFLAGS=-march=native|CXXFLAGS=-march=armv7-a|" makefile; fi && \
   make -j ${MAKE_JOBS} && \
   install -v -m755 unrar /usr/bin
 

docker/README.md

@@ -100,6 +100,7 @@ Dockerfile supports next build arguments:
 |:----------------|-
 | NZBGET_RELEASE  | Branch name or tag to build from
 | UNRAR_VERSION   | Unrar version
+| UNRAR_NATIVE    | Build native unrar (see below)
 | MAKE_JOBS       | Number of make jobs for speed up build
 
 # ghcr.io
@@ -117,3 +118,41 @@ In case a linux image or docker image is slower than expected, here are some tip
 1. Increase number of server connections (NEWS-SERVERS -> Connections) - default is 8, and 16 and 32 are worth trying
 2. For slower machines/hosts - increase article read chunk size from 4 to 64 (CONNECTION -> ArticleReadChunkSize). This is new setting available in v23.
 
+# Native unrar build support
+
+Unrar from version 7.0 supports hardware crypto acceleration for unpacking encrypted archives.
+For compatibility with most hardware nzbgetcom image unrar built with next march parameters:
+
+- x86_64: x86-64-v2
+- arm64:  armv8-a
+- armhf:  armv7-a
+
+To build image on hardware which support crypto acceleration with native-optimized unrar can be used docker-compose like this (also needed entrypoint.sh and Dockerfile from [official repository](https://github.com/nzbgetcom/nzbget/tree/develop/docker)):
+
+
+```
+---
+services:
+  nzbget:
+    build:
+      context: .
+      args:
+        # branch to build nzbget from
+        NZBGET_RELEASE: "develop"
+        # make jobs == host cpu cores
+        MAKE_JOBS: 4
+        # build native unrar
+        UNRAR_NATIVE: "true"
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=Europe/London
+      - NZBGET_USER=nzbget
+      - NZBGET_PASS=tegbzn6789
+    volumes:
+      - ./config:/config
+      - ./downloads:/downloads
+    ports:
+      - 6789:6789
+    restart: unless-stopped
+```

docker/docker-compose.yml

@@ -6,7 +6,8 @@ services:
       args:
         NZBGET_RELEASE: develop
         MAKE_JOBS: 4
-    environment:      
+        UNRAR_NATIVE: true
+    environment:
       - PUID=1000
       - PGID=1000
       - TZ=Europe/London