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import sbt._
import org.apache.commons.lang3.SystemUtils
import org.apache.commons.lang3.StringUtils.replaceEach
/**
* A class that generates a shell or batch script to execute a Scala program.
*
* This is a simplified copy of Ant task (see scala.tools.ant.ScalaTool).
*/
case class ScalaTool(mainClass: String,
classpath: List[String],
properties: Map[String, String],
javaOpts: String,
toolFlags: String) {
// For classpath, the platform specific
// demarcation of any script variables (e.g. `${SCALA_HOME}` or
// `%SCALA_HOME%`) can be specified in a platform independent way (e.g.
// `@SCALA_HOME@`) and automatically translated for you.
def patchedToolScript(template: String, forWindows: Boolean) = {
val varRegex = """@(\w+)@""" // the group should be able to capture each of the keys of the map below
val platformClasspath =
if(forWindows) classpath.mkString(";").replace('/', '\\').replaceAll(varRegex, "%$1%")
else if(SystemUtils.IS_OS_WINDOWS) {
// When building on Windows, use a Windows classpath in the shell script (for MSYS/Cygwin).
// This is only used for "quick", which uses absolute paths, so it is not portable anyway.
classpath.mkString(";").replace("\\", "\\\\").replaceAll(varRegex, """\${$1}""")
} else classpath.mkString(":").replace('\\', '/').replaceAll(varRegex, """\${$1}""")
val variables = Map(
"@@" -> "@", // for backwards compatibility
"@class@" -> mainClass,
"@properties@" -> (properties map { case (k, v) => s"""-D$k="$v""""} mkString " "),
"@javaflags@" -> javaOpts,
"@toolflags@" -> toolFlags,
"@classpath@" -> platformClasspath
)
val (from, to) = variables.unzip
replaceEach(template, from.toArray, to.toArray)
}
def writeScript(file: String, platform: String, rootDir: File, outDir: File): File = {
val forWindows = platform match { case "windows" => true case _ => false }
val templatePath = s"scala/tools/ant/templates/tool-$platform.tmpl"
val suffix = if(forWindows) ".bat" else ""
val scriptFile = outDir / s"$file$suffix"
val patched = patchedToolScript(IO.read(rootDir / templatePath).replace("\r", ""), forWindows)
IO.write(scriptFile, if(forWindows) patched.replace("\n", "\r\n") else patched)
scriptFile
}
}
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