Prepare building environment for F-Droid.

.gitignore

@@ -33,3 +33,14 @@ proguard/
 *.ipr
 *.iws
 .idea/
+
+# Gradle wrapper
+gradle/wrapper/gradle/
+gradle/wrapper/gradlew*
+
+# Syncthing native dependencies
+ext/syncthing/pkg/
+ext/syncthing/src/code.google.com/
+ext/syncthing/src/github.com/kr/
+ext/syncthing/src/github.com/mattn/
+ext/syncthing/src/github.com/tools/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "ext/syncthing/src/github.com/syncthing/syncthing"]
+	path = ext/syncthing/src/github.com/syncthing/syncthing
+	url = https://github.com/syncthing/syncthing.git

README.md

@@ -1,17 +1,32 @@
 ## syncthing-android
 
-A wrapper of [syncthing](https://github.com/calmh/syncthing) for Android.
+A wrapper of [syncthing](https://github.com/syncthing/syncthing) for Android.
 
 [![Get it on Google Play](https://developer.android.com/images/brand/en_generic_rgb_wo_60.png)](https://play.google.com/store/apps/details?id=com.nutomic.syncthingandroid)
 
+## Requirements
+- sudo apt-get install build-essential
+- Android SDK 19+ and the Android Support Repository are required.
+- Use `git clone --recursive https://github.com/Nutomic/syncthing-android` to download the source and its submodules.
+
 ## Building
 
-To get syncthing app for android running on you device/emulator the native syncthing binary has to be available. There are multiple ways to get the native syncthing binary:
-- open a syncthing apk (the one taken from the play store) running on your device as a zip, extract the `lib/` folder into your project directory and rename it to `libs/`.
-- Depending on your target architecture, download `syncthing-linux-386`, `syncthing-linux-armv5`, `syncthing-linux-armv7` or `syncthing-linux-mips` from [syncthing releases](https://github.com/calmh/syncthing/releases), and extract the binary to `libs/x86/libsyncthing.so`, `libs/armeabi-v7a/libsyncthing.so`, `libs/armeabi/libsyncthing.so` or `libs/mips/libsyncthing.so` respectively.
-- Set up a syncthing compile and run `gradle buildNative` in your syncthing-android directory.
+Use `gradlew assembleDebug` to compile the APK.
+
+Note: Gradlew is a gradle wrapper which allows to specify the gradle version. Use `gradle -b gradle/wrapper/build.xml wrapper` to create your own gradlew instance. Then add it to your path using `export PATH=$PATH:$(pwd)/gradle/wrapper`.
+
+The build process follows three phases:
+- It downloads and compiles Golang v1.3 for x86 and ARM cross-compilation: Syncthing-android depends on Syncthing "native" (https://github.com/syncthing/syncthing) and this requires Go v1.3.
+- The Syncthing native libraries are compiled for the different architectures using `gradlew buildNative`.
+- The final APK is built using the `gradlew assembleDebug` task.
+
+
+## Getting Syncthing without building natively
+
+To get Syncthing app for Android running on you device/emulator the native syncthing binary has to be available. There are multiple ways to get the native syncthing binary:
+- open the Syncthing apk (the one taken from the play store) running on your device as a zip, extract the `lib/` folder into your project directory and rename it to `libs/`.
+- Depending on your target architecture, download `syncthing-linux-386`, `syncthing-linux-armv5`, `syncthing-linux-armv7` or `syncthing-linux-mips` from [syncthing releases](https://github.com/calmh/syncthing/releases), and extract the binary to `libs/x86/libsyncthing.so`, `libs/armeabi/libsyncthing.so`, `libs/armeabi-v7a/libsyncthing.so` or `libs/mips/libsyncthing.so` respectively.
 
-Then, run `gradle assembleDebug`.
 
 ## License
 

build-native.sh

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-cd "$GOPATH/src/github.com/syncthing/syncthing/"
-
-rm bin/
-
-./build.sh test || exit 1
-
-export GOOS=linux
-export ENVIRONMENT=android
-
-GOARCH=386 ./build.sh "" -tags noupgrade
-mv bin/linux_386/syncthing bin/syncthing-x86
-
-GOARCH=arm GOARM=5 ./build.sh "" -tags noupgrade
-mv bin/linux_arm/syncthing bin/syncthing-armeabi
-
-GOARCH=arm GOARM=7 ./build.sh "" -tags noupgrade
-mv bin/linux_arm/syncthing bin/syncthing-armeabi-v7a

build-syncthing.sh

@@ -0,0 +1,86 @@
+#!/bin/bash -e
+
+# Build the syncthing library
+ORIG=$(pwd)
+mkdir -p bin
+
+# Load submodules
+if [ ! -f "ext/syncthing/src/github.com/syncthing/syncthing/.git" ]; then
+	git submodule update --init --recursive
+fi
+
+# Check for GOLANG installation
+if [ -z $GOROOT ]; then
+	mkdir -p "build"
+	tmpgo='build/go'
+	if [ ! -f "$tmpgo/bin/go" ]; then
+		# Download GOLANG v1.3
+		wget -O go.src.tar.gz https://golang.org/dl/go1.3.src.tar.gz
+		sha1=$(sha1sum go.src.tar.gz)
+		if [ "$sha1" != "9f9dfcbcb4fa126b2b66c0830dc733215f2f056e  go.src.tar.gz" ]; then
+			echo "go.src.tar.gz SHA1 checksum does not match!"
+			exit 1
+		fi
+		mkdir -p $tmpgo
+		tar -xzf go.src.tar.gz --strip=1 -C $tmpgo
+		rm go.src.tar.gz
+		# Build GO for host
+		pushd $tmpgo/src
+		./make.bash --no-clean
+		popd
+	fi
+	# Add GO to the environment
+	export GOROOT="$(readlink -e $tmpgo)"
+fi
+
+# Add GO compiler to PATH
+export PATH=$PATH:$GOROOT/bin
+
+# Check whether GOLANG is compiled with cross-compilation for 386
+if [ ! -f $GOROOT/bin/linux_386/go ]; then
+	pushd $GOROOT/src
+	# Build GO for cross-compilation
+	GOOS=linux GOARCH=386 ./make.bash --no-clean
+	popd
+fi
+
+# Check whether GOLANG is compiled with cross-compilation for arm
+if [ ! -f $GOROOT/bin/linux_arm/go ]; then
+	pushd $GOROOT/src
+	# Build GO for cross-compilation
+	GOOS=linux GOARCH=arm ./make.bash --no-clean
+	popd
+fi
+
+# Setup GOPATH
+cd "ext/syncthing/"
+export GOPATH="$(pwd)"
+
+# Install godep
+$GOROOT/bin/go get github.com/tools/godep
+export PATH="$(readlink -e bin)":$PATH
+
+# Install dependencies
+cd src/github.com/syncthing/syncthing
+./build.sh setup || true
+
+# Build test
+#./build.sh test || exit 1
+
+export GOOS=linux
+export ENVIRONMENT=android
+
+# X86
+$GOROOT/bin/go run build.go -goos linux -goarch 386 -no-upgrade build
+mv syncthing $ORIG/bin/syncthing-x86
+$GOROOT/bin/go run build.go clean
+
+# ARM-7
+$GOROOT/bin/go run build.go -goos linux -goarch armv7 -no-upgrade build
+mv syncthing $ORIG/bin/syncthing-armeabi-v7a
+$GOROOT/bin/go run build.go clean
+
+# ARM-5
+$GOROOT/bin/go run build.go -goos linux -goarch armv5 -no-upgrade build
+mv syncthing $ORIG/bin/syncthing-armeabi
+$GOROOT/bin/go run build.go clean

build.gradle

@@ -22,6 +22,10 @@ dependencies {
 	compile 'com.android.support:appcompat-v7:19.1.+'
 }
 
+preBuild {
+	dependsOn 'buildNative'
+}
+
 android {
 	compileSdkVersion 19
 	buildToolsVersion "19.1.0"
@@ -84,6 +88,9 @@ android {
 				abiFilter "mips"
 			}
 		}
+		fat {
+			versionCode Integer.parseInt("0" + defaultConfig.versionCode)
+		}
 	}
 }
 
@@ -97,19 +104,32 @@ def getVersionCodeFromManifest() {
 
 task buildNative(type: Exec) {
 	outputs.upToDateWhen { false }
-	executable = './build-native.sh'
+	executable = './build-syncthing.sh'
 }
 
 task copyNative(type: Copy) {
-	def st_dir = System.getenv("GOPATH") + "/src/github.com/syncthing/syncthing/bin/";
-	from st_dir + 'syncthing-x86', st_dir + 'syncthing-armeabi-v7a', st_dir + 'syncthing-armeabi';
-	into 'libs/'
+	def lib_dir = "libs/"
+	new File(lib_dir).mkdirs()
+	def st_dir = "bin/";
+	from st_dir + 'syncthing-x86', st_dir + 'syncthing-armeabi', st_dir + 'syncthing-armeabi-v7a';
+	into lib_dir
 	rename('syncthing-x86', 'x86/libsyncthing.so')
     rename('syncthing-armeabi-v7a', 'armeabi-v7a/libsyncthing.so')
 	rename('syncthing-armeabi', 'armeabi/libsyncthing.so')
 }
 buildNative.finalizedBy copyNative
 
-task cleanNative(type: Delete) {
-	delete 'libs/'
+task cleanBin(type: Delete) {
+	delete 'bin/'
 }
+copyNative.finalizedBy cleanBin
+
+task cleanNative(type: Delete) {
+	delete 'bin/'
+	delete 'build/'
+	delete 'libs/'
+	delete 'ext/syncthing/bin/'
+	delete 'ext/syncthing/pkg/'
+}
+clean.dependsOn cleanNative
+

ext/syncthing/src/github.com/syncthing/syncthing

@@ -0,0 +1 @@
+Subproject commit c57656e4c3162fcdfc99eaee95bf4b2473dbbb72

gradle/wrapper/build.xml

@@ -0,0 +1,3 @@
+task wrapper(type: Wrapper) {
+	gradleVersion = '1.12'
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Aug 04 01:49:45 CEST 2014
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-1.12-bin.zip