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ammonite.interp.script.ScriptCompiler.scala Maven / Gradle / Ivy
package ammonite.interp.script
import java.util.concurrent.ConcurrentHashMap
import ammonite.compiler.iface.{CodeWrapper, Compiler => AmmCompiler, CompilerBuilder}
import ammonite.runtime.Storage
import ammonite.util.{Imports, Printer}
import scala.collection.JavaConverters._
import scala.collection.mutable
final class ScriptCompiler(
compilerBuilder: CompilerBuilder,
storage: Storage,
printer: Printer, // TODO Remove this
codeWrapper: CodeWrapper,
initialClassLoader: ClassLoader,
initialImports: Imports,
classPathWhitelist: Set[Seq[String]],
wd: Option[os.Path],
outputDirectory: Option[os.Path],
generateSemanticDbs: Boolean,
inMemoryCache: Boolean
) {
import ScriptProcessor.SeqOps
def scalaVersion = compilerBuilder.scalaVersion
/** Compiles a script, along with its dependencies */
def compile(
module: Script,
processor: ScriptProcessor,
doCompile: (Script, Script.ResolvedDependencies) => ScriptCompileResult = compile(_, _)
): (
Map[Script, Seq[Diagnostic]],
Either[String, Seq[AmmCompiler.Output]]
) = {
val diagnostics = new mutable.HashMap[Script, Seq[Diagnostic]]
val res = for {
dependencies <- processor.dependencies(module)
depsOutput <- dependencies
.filter(_ != module)
.traverse { mod =>
// recurses, beware
// and not stack safe…
val (diagnostics0, res0) = compile(mod, processor, doCompile)
diagnostics ++= diagnostics0
res0
}
.left.map(_.mkString(", "))
.map(_.flatten)
jars <- processor.jarDependencies(module)
pluginJars <- processor.jarPluginDependencies(module)
resolvedDeps = Script.ResolvedDependencies(jars, pluginJars, depsOutput.flatMap(_.classFiles))
output <- {
val compileResult = doCompile(module, resolvedDeps)
diagnostics += module -> compileResult.diagnostics
compileResult.errorOrOutput
}
} yield output
(diagnostics.toMap, res)
}
/**
* Compiles a single script.
*
* Beware that this *also* writes results on disk, in `outputDirectory`.
* If semantic DB generation is enabled, semantic DBs are *only*
* written on disk.
*/
def compile(
module: Script,
dependencies: Script.ResolvedDependencies
): ScriptCompileResult =
compileIfNeeded(moduleSettings(module), module, dependencies)
/**
* Reads compilation output from cache.
*/
def compileFromCache(
script: Script,
dependencies: Script.ResolvedDependencies
): Option[ScriptCompileResult] = {
val settingsArgs = moduleSettings(script)
compileFromCache(settingsArgs, script, dependencies)
}
private def moduleOutput(module: Script): Option[os.Path] =
for {
outputDirectory0 <- outputDirectory
segments0 <- module.segments(wd)
dest = outputDirectory0 / segments0.init / segments0.last.stripSuffix(".sc")
} yield dest
private def moduleSources(module: Script): Option[os.Path] =
moduleOutput(module).map(_ / "src")
def moduleTarget(module: Script): Option[os.Path] =
moduleOutput(module).map(_ / "target")
/** Arguments passed to scalac to compile this script */
def moduleSettings(module: Script): List[String] =
if (generateSemanticDbs) {
val isScala2 = compilerBuilder.scalaVersion.startsWith("2.")
if (isScala2)
List(
"-Yrangepos",
"-P:semanticdb:failures:warning",
"-P:semanticdb:synthetics:on"
) ++
moduleSources(module).map(d => s"-P:semanticdb:sourceroot:${d.toNIO.toAbsolutePath}") ++
moduleTarget(module).map(d => s"-P:semanticdb:targetroot:${d.toNIO.toAbsolutePath}")
else
List("-Xsemanticdb") ++
moduleSources(module).toList
.flatMap(d => Seq("-sourceroot", d.toNIO.toAbsolutePath.toString)) ++
moduleTarget(module).toList
.flatMap(d => Seq("-semanticdb-target", d.toNIO.toAbsolutePath.toString))
} else
Nil
/** Writes on disk the source passed to scalac, corresponding to this script */
def preCompile(module: Script): Unit = {
val compiler = new SingleScriptCompiler(
compilerBuilder,
initialClassLoader,
storage,
printer,
initialImports,
classPathWhitelist,
codeWrapper,
wd,
generateSemanticDbs,
moduleSettings(module),
module,
Script.ResolvedDependencies(Nil, Nil, Nil),
moduleTarget(module),
moduleSources(module)
)
compiler.writeSources()
}
private final case class InMemoryCacheKey(
settings: Seq[String],
script: Script,
dependencies: Script.ResolvedDependencies
) {
def stale: Boolean =
script.codeSource.path.exists { path =>
!os.isFile(path) || {
// short-circuit that by looking at the file size?
val content = os.read(path)
script.code != content
}
}
}
private val cache = new ConcurrentHashMap[InMemoryCacheKey, ScriptCompileResult]
def clearCache(): Unit = {
cache.clear()
}
private def cleanUpCache(): Unit =
for {
(key, res) <- cache.asScala.toVector
if key.stale
} {
cache.remove(key, res)
for (dir <- moduleTarget(key.script).iterator ++ moduleSources(key.script).iterator)
try os.remove.all(dir)
catch {
case _: java.nio.file.DirectoryNotEmptyException =>
// Can happen on Windows, if any of the file we try to delete is opened elsewhere
}
}
private def compileFromCache(
settingsArgs: Seq[String],
script: Script,
dependencies: Script.ResolvedDependencies
): Option[ScriptCompileResult] =
if (inMemoryCache && script.codeSource.path.nonEmpty) {
cleanUpCache()
val key = InMemoryCacheKey(settingsArgs, script, dependencies)
Option(cache.get(key))
} else
None
private def compileIfNeeded(
settingsArgs: Seq[String],
script: Script,
dependencies: Script.ResolvedDependencies
): ScriptCompileResult =
if (inMemoryCache && script.codeSource.path.nonEmpty) {
val key = InMemoryCacheKey(settingsArgs, script, dependencies)
Option(cache.get(key)).getOrElse {
cleanUpCache()
val res = doCompile(settingsArgs, script, dependencies)
Option(cache.putIfAbsent(key, res))
.getOrElse(res)
}
} else
doCompile(settingsArgs, script, dependencies)
private def doCompile(
settingsArgs: Seq[String],
module: Script,
dependencies: Script.ResolvedDependencies
): ScriptCompileResult = {
val compiler = new SingleScriptCompiler(
compilerBuilder,
initialClassLoader,
storage,
printer,
initialImports,
classPathWhitelist,
codeWrapper,
wd,
generateSemanticDbs,
settingsArgs,
module,
dependencies,
moduleTarget(module),
moduleSources(module)
)
compiler()
}
}
