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author | rockjam <5min4eq.unity@gmail.com> | 2016-06-23 20:44:40 +0300 |
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committer | rockjam <5min4eq.unity@gmail.com> | 2016-06-24 07:27:36 +0300 |
commit | 314df6dd5627a55f7e368f6fd62c0ad85922607a (patch) | |
tree | 422501c56b05b02b9b6729726417ef204da23ef7 /plugins/uber-jar/src/UberJar.scala | |
parent | fd6c08a1fe03fee7ccb87200bf4ff4b717d42864 (diff) | |
download | cbt-314df6dd5627a55f7e368f6fd62c0ad85922607a.tar.gz cbt-314df6dd5627a55f7e368f6fd62c0ad85922607a.tar.bz2 cbt-314df6dd5627a55f7e368f6fd62c0ad85922607a.zip |
uber-jar plugin implementation
Diffstat (limited to 'plugins/uber-jar/src/UberJar.scala')
-rw-r--r-- | plugins/uber-jar/src/UberJar.scala | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/plugins/uber-jar/src/UberJar.scala b/plugins/uber-jar/src/UberJar.scala new file mode 100644 index 0000000..32b5c4a --- /dev/null +++ b/plugins/uber-jar/src/UberJar.scala @@ -0,0 +1,128 @@ +package cbt + +import java.io.{File, FileOutputStream} +import java.nio.file._ +import java.util.jar +import java.util.jar.JarOutputStream + +import cbt.uberjar._ + +import scala.util.{Failure, Success, Try} + +trait UberJar extends BaseBuild { + + private val log: String => Unit = logger.log("uber-jar", _) + + final def uberJar: ExitCode = { + // we need compile first to produce target directory + compile + System.err.println("Creating uber jar...") + UberJar.createUberJar( + targetDir = target, + compilerTarget = compileTarget, + classpath = classpath, + mainClass = uberJarMainClass, + jarName = uberJarName + )(log) match { + case Success(_) => + System.err.println("Creating uber jar - DONE") + ExitCode.Success + case Failure(e) => + System.err.println(s"Failed to create uber jar, cause: $e") + ExitCode.Failure + } + } + + def uberJarMainClass: Option[String] = Some(runClass) + + def uberJarName: String = projectName + +} + +object UberJar extends JarUtils { + import TryWithResources._ + + /** + * Creates uber jar for given build. + * Uber jar construction steps: + * 1. create jar file with our customized MANIFEST.MF + * 2. write files from `compilerTarget` to jar file + * 3. get all jars from `classpath` + * 4. extract all jars, filter out their MANIFEST.MF and signatures files + * 5. write content of all jars to target jar file + * 6. Finalize everything, and return `ExitCode` + * @param targetDir build's target directory + * @param compilerTarget directory where compiled classfiles are + * @param classpath build's classpath + * @param mainClass main class name(optional) + * @param jarName name of resulting jar file + * @param log logger + * @return `ExitCode.Success` if uber jar created and `ExitCode.Failure` otherwise + */ + def createUberJar(targetDir: File, + compilerTarget: File, + classpath: ClassPath, + mainClass: Option[String], + jarName: String + )(log: String => Unit): Try[Unit] = { + val targetPath = targetDir.toPath + log(s"Target directory is: $targetPath") + log(s"Compiler targer directory is: $compilerTarget") + log(s"Classpath is: $classpath") + mainClass foreach (c => log(s"Main class is is: $c")) + + val jarPath = { + log("Creating jar file...") + val validJarName = if (jarName.endsWith("*.jar")) jarName else jarName + ".jar" + log(s"Jar name is: $validJarName") + val path = targetPath.resolve(validJarName) + Files.deleteIfExists(path) + Files.createFile(path) + log("Creating jar file - DONE") + path + } + withCloseable(new JarOutputStream(new FileOutputStream(jarPath.toFile), createManifest(mainClass))) { out => + writeTarget(compilerTarget, out)(log) + + // it will contain all jar files, including jars, that cbt depend on! Not good! + val jars = classpath.files filter (f => jarFileMatcher.matches(f.toPath)) + log(s"Found ${jars.length} jar dependencies: \n ${jars mkString "\n"}") + writeExtractedJars(jars, targetPath, out)(log) + + // TODO: make it in try-catch-finally style + out.close() + System.err.println(s"Uber jar created. You can grab it at $jarPath") + } + } + + // Main-Class: classname + // Manifest-Version: 1.0 + // Created-By: 1.7.0_06 (Oracle Corporation) + // this template is taken from java tutorial oracle site. replace with actual value, if possible...if needed + private def createManifest(mainClass: Option[String]): jar.Manifest = { + val m = new jar.Manifest() + m.getMainAttributes.putValue("Manifest-Version", "1.0") + m.getMainAttributes.putValue("Created-By", "1.7.0_06 (Oracle Corporation)") + mainClass foreach { className => + m.getMainAttributes.putValue("Main-Class", className) + } + m + } + + private def writeTarget(compilerTargetDir: File, out: JarOutputStream)(log: String => Unit): Unit = { + log("Writing target directory...") + writeFilesToJar(compilerTargetDir.toPath, out)(log) + log("Writing target directory - DONE") + } + + private def writeExtractedJars(jars: Seq[File], targetDir: Path, out: JarOutputStream)(log: String => Unit): Unit = { + log("Extracting jars") + val extractedJarsRoot = extractJars(jars)(log) + log("Extracting jars - DONE") + + log("Writing dependencies...") + writeFilesToJar(extractedJarsRoot, out)(log) + log("Writing dependencies - DONE") + } + +} |