The plugin for building the samples assumed that the current working
directory would be the directory containing the project’s build.gradle.
While this is generally true on the command line (it isn’t if
-project-dir is used), it isn’t true in Gradle’s IDE integration. This
was leading to an NPE as the sampleBuild task was being configured
to depend on a null task as a result of not finding the sample’s pom.xml
or build.grade file.
This commit corrects the main build.gradle to configure each sample’s
working directory relative to the root project’s directory, rather
than relying on the working directory. It also improves
SampleBuildConfigurer so that it will throw an exception if it fails to
find a sample’s build.gradle or pom.xml rather than continuing
and triggering an NPE inside Gradle.
Closes gh-185
194e62bde3