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import org.apache.velocity.VelocityContext
import org.apache.velocity.app.VelocityEngine
import org.apache.velocity.runtime.log.SystemLogChute
import org.gradle.api.DefaultTask
import org.gradle.api.tasks.InputDirectory
import org.gradle.api.tasks.OutputDirectory
import org.gradle.api.tasks.TaskAction
class VelocityTask extends DefaultTask {
@InputDirectory
File inputDir
@OutputDirectory
File outputDir
String filter = '**/*.java'
File includeDir
Map<String, Object> contextValues = [:]
@TaskAction
void run() {
outputDir.deleteDir()
outputDir.mkdirs()
// println "Velocity: $inputDir -> $outputDir"
VelocityEngine engine = new VelocityEngine()
engine.setProperty(VelocityEngine.RUNTIME_LOG_LOGSYSTEM_CLASS, SystemLogChute.class.name)
engine.setProperty(VelocityEngine.RESOURCE_LOADER, "file")
engine.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_CACHE, "true")
if (includeDir != null)
engine.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH, includeDir.getAbsolutePath())
def inputFiles = project.fileTree(
dir: inputDir,
include: filter
)
inputFiles.visit { e ->
if (e.file.isFile()) {
File outputFile = e.relativePath.getFile(outputDir)
VelocityContext context = new VelocityContext()
contextValues.each { context.put(it.key, it.value) }
context.put('project', project)
context.put('package', e.relativePath.parent.segments.join('.'))
context.put('class', e.relativePath.lastName.replaceFirst("\\.java\$", ""))
// println "Parsing ${e.file}"
e.file.withReader { reader ->
outputFile.parentFile.mkdirs()
outputFile.withWriter { writer ->
engine.evaluate(context, writer, e.relativePath.toString(), reader)
}
}
}
}
}
}
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