Build fails, due to error in ``./com.ibm.wala.dalvik.test/build.xml``: Copy precondition not evaluated

[jgsuess]

in ./com.ibm.wala.dalvik.test/build.xml:40 the property androiddir is set

	<condition property="androiddir" value="${env.ANDROID_HOME}"> 
          <isset property="env.ANDROID_HOME" /> 
	</condition> 

however, even if unset (i.e. no ANDROID_HOME), it is still referenced in l.68 fetchDxJar and called via dependency from getJars

	<target name="fetchDxJar">
		<mkdir dir="${basedir}/lib/"/>
		<copy
		    file="${androiddir}/build-tools/26.0.2/lib/dx.jar"
		    tofile="${basedir}/lib/dx.jar" force="true"/>
	</target>

leading to build failure:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (default) on project com.ibm.wala.dalvik.test: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] (dir)/WALA/com.ibm.wala.dalvik.test/build.xml:72: Warning: Could not find file (dir)//WALA/com.ibm.wala.dalvik.test/${androiddir}/build-tools/26.0.2/lib/dx.jar to copy.
[ERROR] around Ant part ...<ant antfile="(dir)/WALA/com.ibm.wala.dalvik.test/build.xml" target="getJars"/>... @ 5:94 in (dir)/WALA/com.ibm.wala.dalvik.test/target/antrun/build-main.xml

[jgsuess]

All of this seems to lead to dx.jar from the Android SDK. Is the SDK a prerequisite for the build? Which version?

[jgsuess]

It seems that the required package for Ubuntu is the Build Tools Installer. The file ends in /usr/share/java/dx.jar.

[msridhar]

@jgsuess can we close this? Do we need a documentation fix somewhere?