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Allow JLine to fall back to a dumb terminal #21330

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Aug 6, 2024
Merged

Allow JLine to fall back to a dumb terminal #21330

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13 changes: 9 additions & 4 deletions compiler/src/dotty/tools/repl/JLineTerminal.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -21,11 +21,16 @@ class JLineTerminal extends java.io.Closeable {
// Logger.getLogger("org.jline").setLevel(Level.FINEST)

private val terminal =
TerminalBuilder.builder()
.dumb(dumbTerminal) // fail early if not able to create a terminal
.build()
var builder = TerminalBuilder.builder()
if System.getenv("TERM") == "dumb" then
// Force dumb terminal if `TERM` is `"dumb"`.
// Note: the default value for the `dumb` option is `null`, which allows
// JLine to fall back to a dumb terminal. This is different than `true` or
// `false` and can't be set using the `dumb` setter.
// This option is used at https://github.com/jline/jline3/blob/894b5e72cde28a551079402add4caea7f5527806/terminal/src/main/java/org/jline/terminal/TerminalBuilder.java#L528.
builder.dumb(true)
builder.build()
private val history = new DefaultHistory
def dumbTerminal = Option(System.getenv("TERM")) == Some("dumb")

private def blue(str: String)(using Context) =
if (ctx.settings.color.value != "never") Console.BLUE + str + Console.RESET
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28 changes: 17 additions & 11 deletions compiler/test-coursier/dotty/tools/coursier/CoursierScalaTests.scala
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Expand Up @@ -75,8 +75,8 @@ class CoursierScalaTests:
version()

def emptyArgsEqualsRepl() =
val output = CoursierScalaTests.csScalaCmd()
assertTrue(output.mkString("\n").contains("Unable to create a terminal")) // Scala attempted to create REPL so we can assume it is working
val output = CoursierScalaTests.csScalaCmdWithStdin(Seq.empty, Some("println(\"Hello World\")\n:quit"))
assertTrue(output.mkString("\n").contains("Hello World"))
emptyArgsEqualsRepl()

def run() =
Expand Down Expand Up @@ -132,8 +132,8 @@ class CoursierScalaTests:
compileFilesToJarAndRun()

def replWithArgs() =
val output = CoursierScalaTests.csScalaCmd("-source", "3.0-migration")
assertTrue(output.mkString("\n").contains("Unable to create a terminal")) // Scala attempted to create REPL so we can assume it is working
val output = CoursierScalaTests.csScalaCmdWithStdin(Seq("-source", "3.0-migration"), Some("println(\"Hello World\")\n:quit"))
assertTrue(output.mkString("\n").contains("Hello World"))
replWithArgs()

def argumentFile() =
Expand All @@ -148,25 +148,31 @@ class CoursierScalaTests:

object CoursierScalaTests:

def execCmd(command: String, options: String*): (Int, List[String]) =
private def execCmd(command: String, options: Seq[String] = Seq.empty, stdin: Option[String] = None): (Int, List[String]) =
val cmd = (command :: options.toList).toSeq.mkString(" ")
val out = new ListBuffer[String]
val code = cmd.!(ProcessLogger(out += _, out += _))
val process = stdin match
case Some(input) => Process(cmd) #< new java.io.ByteArrayInputStream(input.getBytes)
case None => Process(cmd)
val code = process.!(ProcessLogger(out += _, out += _))
(code, out.toList)

def csScalaCmd(options: String*): List[String] =
csCmd("dotty.tools.MainGenericRunner", options*)
csScalaCmdWithStdin(options, None)

def csScalaCmdWithStdin(options: Seq[String], stdin: Option[String]): List[String] =
csCmd("dotty.tools.MainGenericRunner", options, stdin)

def csScalaCompilerCmd(options: String*): List[String] =
csCmd("dotty.tools.dotc.Main", options*)
csCmd("dotty.tools.dotc.Main", options)

private def csCmd(entry: String, options: String*): List[String] =
private def csCmd(entry: String, options: Seq[String], stdin: Option[String] = None): List[String] =
val (jOpts, args) = options.partition(_.startsWith("-J"))
val newOptions = args match
case Nil => args
case _ => "--" +: args
val newJOpts = jOpts.map(s => s"--java-opt ${s.stripPrefix("-J")}").mkString(" ")
execCmd("./cs", (s"""launch "org.scala-lang:scala3-compiler_3:${sys.env("DOTTY_BOOTSTRAPPED_VERSION")}" $newJOpts --main-class "$entry" --property "scala.usejavacp=true" --property "scala.use_legacy_launcher=true"""" +: newOptions)*)._2
execCmd("./cs", (s"""launch "org.scala-lang:scala3-compiler_3:${sys.env("DOTTY_BOOTSTRAPPED_VERSION")}" $newJOpts --main-class "$entry" --property "scala.usejavacp=true" --property "scala.use_legacy_launcher=true"""" +: newOptions), stdin)._2

/** Get coursier script */
@BeforeClass def setup(): Unit =
Expand All @@ -177,7 +183,7 @@ object CoursierScalaTests:
case other => fail(s"Unsupported OS for coursier launcher: $other")

def runAndCheckCmd(cmd: String, options: String*): Unit =
val (code, out) = execCmd(cmd, options*)
val (code, out) = execCmd(cmd, options)
if code != 0 then
fail(s"Failed to run $cmd ${options.mkString(" ")}, exit code: $code, output: ${out.mkString("\n")}")

Expand Down