mill.scalalib.scalafmt.ScalafmtModule.scala Maven / Gradle / Ivy
package mill.scalalib.scalafmt
import mill._
import mill.main.client.CodeGenConstants.buildFileExtensions
import mill.api.Result
import mill.define.{ExternalModule, Discover}
import mill.scalalib._
import mainargs.arg
trait ScalafmtModule extends JavaModule {
def reformat(): Command[Unit] = T.command {
ScalafmtWorkerModule
.worker()
.reformat(
filesToFormat(sources()),
resolvedScalafmtConfig()
)
}
def checkFormat(): Command[Unit] = T.command {
ScalafmtWorkerModule
.worker()
.checkFormat(
filesToFormat(sources()),
resolvedScalafmtConfig()
)
}
def scalafmtConfig: T[Seq[PathRef]] = T.sources(
T.workspace / ".scalafmt.conf",
os.pwd / ".scalafmt.conf"
)
// TODO: Do we want provide some defaults or write a default file?
private[ScalafmtModule] def resolvedScalafmtConfig: Task[PathRef] = T.task {
val locs = scalafmtConfig()
locs.find(p => os.exists(p.path)) match {
case None => Result.Failure(
s"None of the specified `scalafmtConfig` locations exist. Searched in: ${locs.map(_.path).mkString(", ")}"
)
case Some(c) if (os.read.lines.stream(c.path).find(_.trim.startsWith("version")).isEmpty) =>
Result.Failure(
s"""Found scalafmtConfig file does not specify the scalafmt version to use.
|Please specify the scalafmt version in ${c.path}
|Example:
|version = "2.4.3"
|""".stripMargin
)
case Some(c) => Result.Success(c)
}
}
protected def filesToFormat(sources: Seq[PathRef]) = {
for {
pathRef <- sources if os.exists(pathRef.path)
file <- {
if (os.isDir(pathRef.path)) {
os.walk(pathRef.path).filter(file =>
os.isFile(file) && (file.ext == "scala" || buildFileExtensions.contains(file.ext))
)
} else {
Seq(pathRef.path)
}
}
} yield PathRef(file)
}
}
object ScalafmtModule extends ExternalModule with ScalafmtModule {
def reformatAll(@arg(positional = true) sources: mill.main.Tasks[Seq[PathRef]]): Command[Unit] =
T.command {
val files = T.sequence(sources.value)().flatMap(filesToFormat)
ScalafmtWorkerModule
.worker()
.reformat(
files,
resolvedScalafmtConfig()
)
}
def checkFormatAll(@arg(positional = true) sources: mill.main.Tasks[Seq[PathRef]])
: Command[Unit] =
T.command {
val files = T.sequence(sources.value)().flatMap(filesToFormat)
ScalafmtWorkerModule
.worker()
.checkFormat(
files,
resolvedScalafmtConfig()
)
}
lazy val millDiscover: Discover[this.type] = Discover[this.type]
}