Add Dockerfile and targets for building in Docker

Dockerfile

@@ -0,0 +1,65 @@
+FROM ubuntu:22.04 as build
+
+# Install dependencies
+RUN DEBIAN_FRONTEND=noninteractive \
+  apt-get update \
+  && DEBIAN_FRONTEND=noninteractive apt-get install -y git libffi-dev python3-dev python3-virtualenv libssl-dev autoconf openjdk-17-jdk cmake libtool libssl-dev libncurses5-dev libsqlite3-dev libreadline-dev libtk8.6 libgdm-dev libdb4o-cil-dev libpcap-dev unzip zip wget apksigner  \
+  && apt-get install --reinstall python3 
+
+WORKDIR "/root"
+
+# Copy Sideband
+COPY ./ Sideband/
+
+# Copy gradle init file
+COPY  docker/init.gradle .gradle/
+
+# Clone required repos
+RUN git clone https://github.com/markqvist/Reticulum \
+    && git clone https://github.com/markqvist/LXMF 
+
+# Fetch files required for sideband local repository
+
+RUN mkdir dist_archive 
+
+WORKDIR "dist_archive" 
+
+# Get latest version of whl packages from PyPI
+COPY  docker/dist_env .
+
+RUN export PACKAGENAME=rns; . ./dist_env; wget --content-disposition -q ${DL_URL}; \
+    export PACKAGENAME=rnspure; . ./dist_env; wget --content-disposition -q ${DL_URL}; \
+    export PACKAGENAME=lxmf; . ./dist_env; wget --content-disposition -q ${DL_URL}; \
+    export PACKAGENAME=nomadnet; . ./dist_env; wget --content-disposition -q ${DL_URL}; \
+    export PACKAGENAME=rnsh; . ./dist_env;  wget --content-disposition -q ${DL_URL}; \
+    export PACKAGENAME=sbapp; . ./dist_env;  wget --content-disposition -q ${DL_URL}; 
+
+# Get latest RNode Firmware release
+RUN export VERSION=$(wget -qO - https://api.github.com/repos/markqvist/RNode_Firmware/releases/latest | grep "zipball_url" | grep -oP "\d+\.\d+"); \ 
+    wget -qO - https://api.github.com/repos/markqvist/RNode_Firmware/releases/latest \
+    | grep "zipball_url" | cut -d : -f 2,3 \
+    | tr -d \", | wget -qi - -O RNode_Firmware_${VERSION}_Source.zip 
+
+# Get source for reticulum.network and unsigned.io sites
+RUN git clone https://github.com/markqvist/reticulum_website reticulum.network \
+    && cp reticulum.network/docs/manual/Reticulum\ Manual.pdf . \
+    && cp reticulum.network/docs/manual/Reticulum\ Manual.epub . 
+
+# A mirror can also be accessed at https://liberatedsystems.co.uk/unsigned_io_archive.zip if unsigned.io is down!
+RUN wget -q https://unsigned.io/unsigned_io_archive.zip \ 
+    && unzip -q unsigned_io_archive.zip -d unsigned.io  && rm unsigned_io_archive.zip 
+
+
+WORKDIR "../Sideband/sbapp"
+
+# Set up virtual environment
+RUN virtualenv venv 
+
+RUN bash -c "source venv/bin/activate && pip install -U pip && pip install setuptools==60.5 wheel==0.30 buildozer cython"
+
+WORKDIR "../"
+
+RUN bash -c "make release"
+
+FROM scratch as artifact
+COPY --from=build /root/Sideband/dist/* /

Makefile

@@ -33,6 +33,24 @@ build_wheel:
 
 release: build_wheel apk fetchapk
 
+release_docker:
+	-mkdir -p ./dist
+	@echo If you experience errors, please ensure you have docker-buildx installed on your system.
+	sudo docker build --target=artifact --output type=local,dest=./dist/ .
+	@echo Build successful. APK copied to ./dist directory.
+	$(MAKE) sign_release
+
+sign_release:
+	@echo This stage generates a keystore in the root directory of the repo and signs the APK with it.
+	@echo If a keystore already exists, it is reused.
+	@echo Please make sure you have apksigner and zipalign installed on your system before proceeding.
+	@echo Press enter to continue.
+	@read VOID
+	if [ ! -f "./key.keystore" ]; then keytool -genkey -v -keystore key.keystore -keyalg RSA -keysize 4096 -validity 10000 -alias app; fi
+	VERSION=$(shell ls ./dist/*.apk | cut -d\- -f 2 | head -n 1); \
+	zipalign -p 4 ./dist/sideband-*-release-unsigned.apk ./dist/sideband-$$VERSION-release.apk; \
+	apksigner sign --ks-key-alias app --ks key.keystore ./dist/sideband-$$VERSION-release.apk; \
+
 upload:
 	@echo Ready to publish release, hit enter to continue
 	@read VOID

docker/dist_env

@@ -0,0 +1,2 @@
+export VERSION=$(wget -q https://pypi.org/pypi/${PACKAGENAME}/json -O - | grep -oP "\"version\":\"\d+\.\d+\.+\d+\"" -o | cut -d \" -f 4)
+export DL_URL=$(wget -q https://pypi.org/pypi/${PACKAGENAME}/json -O - | grep -oP "\"url\":\".{1,150}${VERSION}-py\d-none-any.whl\"" | cut -d \" -f 4 | head -n -1)

docker/init.gradle

@@ -0,0 +1,21 @@
+// This is necessary to ensure that Sideband can be built on the
+// correct API version. Else, the build will fail, with the build tools
+// nagging us to upgrade the targetSdkVersion (doing so breaks the
+// program currently). Yet another case of G**gle foolishness. This
+// just bypasses the error and continues compiling regardless.
+
+apply plugin: DisableAbortOnError
+
+class DisableAbortOnError implements Plugin<Gradle> {
+    void apply (Gradle gradle) {
+        gradle.allprojects { project ->
+            afterEvaluate {
+                android {
+                    lintOptions {
+                        abortOnError = false
+                    }
+                }
+            }
+        }
+    }
+}