travis: improve build process and expand build matrix

Make a build heriarchy to reduce images size.
Add Android Things builds to build matrix.
Drop gcc-4 builds, use gcc-5 and gcc-6 instead.
Add SonarQube static analysis scans.

Signed-off-by: Nicolas Oliver <dario.n.oliver@intel.com>

scripts/build-android.sh

@@ -0,0 +1,125 @@
+#!/usr/bin/env bash
+
+set -e
+
+export PKG_CONFIG_LIBDIR="$NDK_HOME/platforms/android-24/arch-x86/usr/lib:$MRAA_INSTALL_DIR/lib/pkgconfig/"
+
+cmake \
+  -DANDROID_COMPILER_FLAGS_CXX='-std=c++11' \
+  -DANDROID_PIE=1 \
+  -DANDROID_PLATFORM=android-24 \
+  -DANDROID_STL_FORCE_FEATURES=ON \
+  -DANDROID_STL=c++_shared \
+  -DANDROID_TOOLCHAIN_NAME=x86-i686 \
+  -DCMAKE_TOOLCHAIN_FILE=$NDK_HOME/build/cmake/android.toolchain.cmake \
+  -DCMAKE_FIND_ROOT_PATH=$MRAA_INSTALL_DIR \
+  -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+  -DJAVA_AWT_INCLUDE_PATH=$JAVA_HOME/include \
+  -DJAVA_AWT_LIBRARY=$JAVA_HOME/jre/lib/amd64/libjawt.so \
+  -DJAVA_INCLUDE_PATH=$JAVA_HOME/include \
+  -DJAVA_INCLUDE_PATH2=$JAVA_HOME/include/linux \
+  -DJAVA_JVM_LIBRARY=$JAVA_HOME/jre/lib/amd64/server/libjvm.so \
+  -DBUILDSWIGJAVA=$BUILDSWIGJAVA \
+  -DBUILDSWIGNODE=$BUILDSWIGNODE \
+  -DBUILDSWIGPYTHON=$BUILDSWIGPYTHON \
+  -DWERROR=$WERROR \
+  -H. \
+  -Bbuild
+
+make -j8 -Cbuild
+
+# Anotate the .java src from doxygen
+find src/ -name "javaupm_*.i" > build/upm.i.list
+# TODO: install doxy port tool
+#doxyport build/upm.i.list \
+#  -s src/interfaces/,src/bacnetmstp,src/bmg160,src/bma250e,src/bmm150 \
+#  -m doxy/samples.mapping.txt \
+#  -d build/src/ \
+#  --convert-protected-to-private \
+#  -o build/upm-java-files.txt \
+#  -c build/compile_commands.json
+
+gen_and_upload() {
+    # Skip any directories without .java src files
+    if [ ! -f *.java ]; then
+        return
+    fi
+
+    # Get the MRAA version string from the .pom file
+    VERSION=$(ls *.pom | perl -nle 'print $2 if /^(.*)-(\d+\.\d+\.\d+)\.pom/')
+    # Get the MRAA name string from the .pom file
+    LIB_NAME=$(ls *.pom | perl -nle 'print $1 if /^(.*)-(\d+\.\d+\.\d+)\.pom/')
+
+    # Bundle upload directory
+    PKG_BUNDLE_DIR=BUNDLE_DIR
+    mkdir -p ${PKG_BUNDLE_DIR}
+
+    # Create the aar directory structure
+    AAR_DIRECTORY="$LIB_NAME-$VERSION"
+    mkdir -p $AAR_DIRECTORY/jni/x86
+    mkdir -p $AAR_DIRECTORY/res/values
+
+    # Write out res/values/values.xml to the aar
+    echo "${values_xml/XXX_LIBRARY/$LIB_NAME}" > $AAR_DIRECTORY/res/values/values.xml
+
+    # Write out AndroidManifest.xml to the aar
+    _tmp_manifest=${AndroidManifest_xml/XXX_PACKAGE/$JAVA_PKG_PREFIX_DOT}
+    _tmp_manifest=${_tmp_manifest/XXX_LIBRARY/$LIB_NAME}
+    echo "${_tmp_manifest/XXX_VERSION/$VERSION}" > $AAR_DIRECTORY/AndroidManifest.xml
+
+    # Copy over the so's
+    cp *.so $AAR_DIRECTORY/jni/x86
+
+    # Create javadoc jar
+    javadoc *.java -d $LIB_NAME-javadoc
+    jar cf $PKG_BUNDLE_DIR/$LIB_NAME-$VERSION-javadoc.jar $LIB_NAME-javadoc/*
+
+    # Create sources jar file for upload
+    jar cf $PKG_BUNDLE_DIR/$LIB_NAME-$VERSION-sources.jar *.java
+
+    # Copy pom file
+    cp $LIB_NAME-$VERSION.pom $PKG_BUNDLE_DIR
+
+    # Copy the java module jar to classes.jar
+    cp $LIB_NAME.jar $AAR_DIRECTORY/classes.jar
+
+    # Create the .aar
+    pushd $AAR_DIRECTORY
+        jar cf ../$PKG_BUNDLE_DIR/$LIB_NAME-$VERSION.aar *
+    popd
+
+    # Create the bundle file
+    pushd $PKG_BUNDLE_DIR
+        # Create the tar bundle
+        jar cvf ../$LIB_NAME-$VERSION-bundle.jar *
+    popd
+}
+
+# Template for res/values/values.xml in aar
+values_xml='<?xml version="1.0" encoding="utf-8"?><resources><string name="app_name">XXX_LIBRARY</string></resources>'
+
+# Template for AndroidManifest.xml in aar
+AndroidManifest_xml='<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="XXX_PACKAGE.XXX_LIBRARY"
+    android:versionCode="1"
+    android:versionName="XXX_VERSION" >
+    <uses-sdk android:minSdkVersion="23" android:targetSdkVersion="25"/>
+    <application android:allowBackup="true" android:label="@string/app_name" android:supportsRtl="true" />
+</manifest>'
+
+# Package prefix
+JAVA_PKG_PREFIX_DOT="io.mraa.at.upm"
+
+# Work in the UPM build directory
+cd build/src
+
+# For each directory in build/src which contains a .pom file...
+for lib_dir in `ls -d */`; do
+    if ls $lib_dir/upm_*.pom 1> /dev/null 2>&1; then
+        pushd $lib_dir
+            # Allow for spawning multiple if necessary (&)
+            gen_and_upload
+        popd
+    fi
+done