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package mill.modules
import java.io.FileOutputStream
import java.nio.file.attribute.PosixFilePermission
import java.util.jar.{JarEntry, JarFile, JarOutputStream}
import ammonite.ops._
import mill.define.Task
import mill.eval.PathRef
import mill.util.Ctx
import scala.annotation.tailrec
import scala.collection.mutable
object Jvm {
def subprocess(mainClass: String,
classPath: Seq[Path],
options: Seq[String] = Seq.empty,
workingDir: Path = ammonite.ops.pwd)
(implicit ctx: Ctx) = {
val proc =
new java.lang.ProcessBuilder()
.directory(workingDir.toIO)
.command(Vector("java", "-cp", classPath.mkString(":"), mainClass) ++ options:_*)
.redirectOutput(ProcessBuilder.Redirect.PIPE)
.redirectError(ProcessBuilder.Redirect.PIPE)
.start()
val stdout = proc.getInputStream
val stderr = proc.getErrorStream
val sources = Seq(stdout , stderr)
while(
// Process.isAlive doesn't exist on JDK 7 =/
util.Try(proc.exitValue).isFailure ||
stdout.available() > 0 ||
stderr.available() > 0
){
var readSomething = false
for (std <- sources){
while (std.available() > 0){
readSomething = true
val array = new Array[Byte](std.available())
val actuallyRead = std.read(array)
ctx.log.outputStream.write(array, 0, actuallyRead)
}
}
// if we did not read anything sleep briefly to avoid spinning
if(!readSomething)
Thread.sleep(2)
}
if (proc.exitValue() != 0) throw new InteractiveShelloutException()
}
private def createManifest(mainClass: Option[String]) = {
val m = new java.util.jar.Manifest()
m.getMainAttributes.put(java.util.jar.Attributes.Name.MANIFEST_VERSION, "1.0")
m.getMainAttributes.putValue( "Created-By", "Scala mill" )
mainClass.foreach(
m.getMainAttributes.put(java.util.jar.Attributes.Name.MAIN_CLASS, _)
)
m
}
def createJar(inputPaths: Seq[Path], mainClass: Option[String] = None)
(implicit ctx: Ctx.DestCtx): PathRef = {
val outputPath = ctx.dest
rm(outputPath)
if(inputPaths.nonEmpty) {
mkdir(outputPath/up)
val jar = new JarOutputStream(
new FileOutputStream(outputPath.toIO),
createManifest(mainClass)
)
try{
assert(inputPaths.forall(exists(_)))
for{
p <- inputPaths
(file, mapping) <-
if (p.isFile) Iterator(p -> empty/p.last)
else ls.rec(p).filter(_.isFile).map(sub => sub -> sub.relativeTo(p))
} {
val entry = new JarEntry(mapping.toString)
entry.setTime(file.mtime.toMillis)
jar.putNextEntry(entry)
jar.write(read.bytes(file))
jar.closeEntry()
}
} finally {
jar.close()
}
}
PathRef(outputPath)
}
def createAssembly(inputPaths: Seq[Path],
mainClass: Option[String] = None,
prependShellScript: String = "")
(implicit ctx: Ctx.DestCtx): PathRef = {
val outputPath = ctx.dest
rm(outputPath)
if(inputPaths.nonEmpty) {
mkdir(outputPath/up)
val output = new FileOutputStream(outputPath.toIO)
// Prepend shell script and make it executable
if (prependShellScript.nonEmpty) {
output.write((prependShellScript + "\n").getBytes)
val perms = java.nio.file.Files.getPosixFilePermissions(outputPath.toNIO)
perms.add(PosixFilePermission.GROUP_EXECUTE)
perms.add(PosixFilePermission.OWNER_EXECUTE)
perms.add(PosixFilePermission.OTHERS_EXECUTE)
java.nio.file.Files.setPosixFilePermissions(outputPath.toNIO, perms)
}
val jar = new JarOutputStream(
output,
createManifest(mainClass)
)
val seen = mutable.Set("META-INF/MANIFEST.MF")
try{
assert(inputPaths.forall(exists(_)))
for{
p <- inputPaths
(file, mapping) <-
if (p.isFile) {
val jf = new JarFile(p.toIO)
import collection.JavaConverters._
for(entry <- jf.entries().asScala if !entry.isDirectory) yield {
read.bytes(jf.getInputStream(entry)) -> entry.getName
}
}
else {
ls.rec(p).iterator
.filter(_.isFile)
.map(sub => read.bytes(sub) -> sub.relativeTo(p).toString)
}
if !seen(mapping)
} {
seen.add(mapping)
val entry = new JarEntry(mapping.toString)
jar.putNextEntry(entry)
jar.write(file)
jar.closeEntry()
}
} finally {
jar.close()
output.close()
}
}
PathRef(outputPath)
}
}
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