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mill.scalalib.SemanticDbJavaModule.scala Maven / Gradle / Ivy
package mill.scalalib
import mill.api.{PathRef, Result, experimental}
import mill.define.{ModuleRef, Target}
import mill.main.BuildInfo
import mill.scalalib.api.{CompilationResult, Versions, ZincWorkerUtil}
import mill.scalalib.bsp.BspBuildTarget
import mill.util.Version
import mill.{Agg, T}
import scala.util.Properties
@experimental
trait SemanticDbJavaModule extends CoursierModule {
def zincWorker: ModuleRef[ZincWorkerModule]
def upstreamCompileOutput: T[Seq[CompilationResult]]
def zincReportCachedProblems: T[Boolean]
def zincIncrementalCompilation: T[Boolean]
def allSourceFiles: T[Seq[PathRef]]
def compile: T[mill.scalalib.api.CompilationResult]
def bspBuildTarget: BspBuildTarget
def javacOptions: T[Seq[String]]
def mandatoryJavacOptions: T[Seq[String]]
def compileClasspath: T[Agg[PathRef]]
def semanticDbVersion: T[String] = T.input {
val builtin = SemanticDbJavaModule.buildTimeSemanticDbVersion
val requested = T.env.getOrElse[String](
"SEMANTICDB_VERSION",
SemanticDbJavaModule.contextSemanticDbVersion.get().getOrElse(builtin)
)
Version.chooseNewest(requested, builtin)(Version.IgnoreQualifierOrdering)
}
def semanticDbJavaVersion: T[String] = T.input {
val builtin = SemanticDbJavaModule.buildTimeJavaSemanticDbVersion
val requested = T.env.getOrElse[String](
"JAVASEMANTICDB_VERSION",
SemanticDbJavaModule.contextJavaSemanticDbVersion.get().getOrElse(builtin)
)
Version.chooseNewest(requested, builtin)(Version.IgnoreQualifierOrdering)
}
def semanticDbScalaVersion: T[String] = BuildInfo.scalaVersion
protected def semanticDbPluginIvyDeps: T[Agg[Dep]] = T {
val sv = semanticDbScalaVersion()
val semDbVersion = semanticDbVersion()
if (!ZincWorkerUtil.isScala3(sv) && semDbVersion.isEmpty) {
val msg =
"""|
|With Scala 2 you must provide a semanticDbVersion
|
|def semanticDbVersion = ???
|""".stripMargin
Result.Failure(msg)
} else if (ZincWorkerUtil.isScala3(sv)) {
Result.Success(Agg.empty[Dep])
} else {
Result.Success(Agg(
ivy"org.scalameta:semanticdb-scalac_${sv}:${semDbVersion}"
))
}
}
private def semanticDbJavaPluginIvyDeps: T[Agg[Dep]] = T {
val sv = semanticDbJavaVersion()
if (sv.isEmpty) {
val msg =
"""|
|You must provide a javaSemanticDbVersion
|
|def semanticDbJavaVersion = ???
|""".stripMargin
Result.Failure(msg)
} else {
Result.Success(Agg(
ivy"com.sourcegraph:semanticdb-javac:${sv}"
))
}
}
/**
* Scalac options to activate the compiler plugins.
*/
protected def semanticDbEnablePluginScalacOptions: T[Seq[String]] = T {
val resolvedJars = defaultResolver().resolveDeps(
semanticDbPluginIvyDeps().map(_.exclude("*" -> "*"))
)
resolvedJars.iterator.map(jar => s"-Xplugin:${jar.path}").toSeq
}
protected def semanticDbPluginClasspath: T[Agg[PathRef]] = T {
defaultResolver().resolveDeps(semanticDbPluginIvyDeps())
}
protected def resolvedSemanticDbJavaPluginIvyDeps: T[Agg[PathRef]] = T {
defaultResolver().resolveDeps(semanticDbJavaPluginIvyDeps())
}
def semanticDbData: T[PathRef] = T.persistent {
val javacOpts = SemanticDbJavaModule.javacOptionsTask(
javacOptions() ++ mandatoryJavacOptions(),
semanticDbJavaVersion()
)
// we currently assume, we don't do incremental java compilation
os.remove.all(T.dest / "classes")
T.log.debug(s"effective javac options: ${javacOpts}")
zincWorker().worker()
.compileJava(
upstreamCompileOutput = upstreamCompileOutput(),
sources = allSourceFiles().map(_.path),
compileClasspath =
(compileClasspath() ++ resolvedSemanticDbJavaPluginIvyDeps()).map(_.path),
javacOptions = javacOpts,
reporter = None,
reportCachedProblems = zincReportCachedProblems(),
incrementalCompilation = zincIncrementalCompilation()
).map(r =>
SemanticDbJavaModule.copySemanticdbFiles(r.classes.path, T.workspace, T.dest / "data")
)
}
// keep in sync with bspCompiledClassesAndSemanticDbFiles
def compiledClassesAndSemanticDbFiles: Target[PathRef] = T {
val dest = T.dest
val classes = compile().classes.path
val sems = semanticDbData().path
if (os.exists(sems)) os.copy(sems, dest, mergeFolders = true)
if (os.exists(classes)) os.copy(classes, dest, mergeFolders = true, replaceExisting = true)
PathRef(dest)
}
// keep in sync with compiledClassesAndSemanticDbFiles
def bspCompiledClassesAndSemanticDbFiles: Target[UnresolvedPath] = {
if (
compiledClassesAndSemanticDbFiles.ctx.enclosing == s"${classOf[SemanticDbJavaModule].getName}#compiledClassesAndSemanticDbFiles"
) {
T {
T.log.debug(
s"compiledClassesAndSemanticDbFiles target was not overridden, assuming hard-coded classes directory for target ${compiledClassesAndSemanticDbFiles}"
)
UnresolvedPath.DestPath(
os.sub,
compiledClassesAndSemanticDbFiles.ctx.segments,
compiledClassesAndSemanticDbFiles.ctx.foreign
)
}
} else {
T {
T.log.debug(
s"compiledClassesAndSemanticDbFiles target was overridden, need to actually execute compilation to get the compiled classes directory for target ${compiledClassesAndSemanticDbFiles}"
)
UnresolvedPath.ResolvedPath(compiledClassesAndSemanticDbFiles().path)
}
}
}
}
object SemanticDbJavaModule {
val buildTimeJavaSemanticDbVersion = Versions.semanticDbJavaVersion
val buildTimeSemanticDbVersion = Versions.semanticDBVersion
private[mill] val contextSemanticDbVersion: InheritableThreadLocal[Option[String]] =
new InheritableThreadLocal[Option[String]] {
protected override def initialValue(): Option[String] = None.asInstanceOf[Option[String]]
}
private[mill] val contextJavaSemanticDbVersion: InheritableThreadLocal[Option[String]] =
new InheritableThreadLocal[Option[String]] {
protected override def initialValue(): Option[String] = None.asInstanceOf[Option[String]]
}
private[mill] def resetContext(): Unit = {
contextJavaSemanticDbVersion.set(None)
contextSemanticDbVersion.set(None)
}
def javacOptionsTask(javacOptions: Seq[String], semanticDbJavaVersion: String)(implicit
ctx: mill.api.Ctx
): Seq[String] = {
// these are only needed for Java 17+
val extracJavacExports =
if (Properties.isJavaAtLeast(17)) List(
"-J--add-exports",
"-Jjdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED",
"-J--add-exports",
"-Jjdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED",
"-J--add-exports",
"-Jjdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED",
"-J--add-exports",
"-Jjdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED",
"-J--add-exports",
"-Jjdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED"
)
else List.empty
val isNewEnough =
Version.isAtLeast(semanticDbJavaVersion, "0.8.10")(Version.IgnoreQualifierOrdering)
val buildTool = s" -build-tool:${if (isNewEnough) "mill" else "sbt"}"
val verbose = if (ctx.log.debugEnabled) " -verbose" else ""
javacOptions ++ Seq(
s"-Xplugin:semanticdb -sourceroot:${ctx.workspace} -targetroot:${ctx.dest / "classes"}${buildTool}${verbose}"
) ++ extracJavacExports
}
// The semanticdb-javac plugin has issues with the -sourceroot setting, so we correct this on the fly
def copySemanticdbFiles(
classesDir: os.Path,
sourceroot: os.Path,
targetDir: os.Path
): PathRef = {
assert(classesDir != targetDir)
os.remove.all(targetDir)
os.makeDir.all(targetDir)
val ups = sourceroot.segments.size
val semanticPath = os.rel / "META-INF/semanticdb"
val toClean = classesDir / semanticPath / sourceroot.segments.toSeq
// copy over all found semanticdb-files into the target directory
// but with corrected directory layout
os.walk(classesDir, preOrder = true)
.filter(os.isFile)
.foreach { p =>
if (p.ext == "semanticdb") {
val target =
if (ups > 0 && p.startsWith(toClean)) {
targetDir / semanticPath / p.relativeTo(toClean)
} else {
targetDir / p.relativeTo(classesDir)
}
os.copy(p, target, createFolders = true)
}
}
PathRef(targetDir)
}
}
