Set globally Java properties for ScalaCLI launcher (#2317)

* Add java.properties key into config

* sclicheck: remove config file for clear command

* Ask user to confirm when change value for key

* Load java properties into ScalaCli from config

* Add docs

Author: lwronski

modules/cli/src/main/scala/scala/cli/ScalaCli.scala

@@ -186,6 +186,17 @@ object ScalaCli {
         System.err.println(
           s"Warning: Only java properties are supported in .scala-jvmopts file. Other options are ignored: ${otherOpts.mkString(", ")} "
         )
+    // load java properties from config
+    for {
+      configDb   <- ConfigDbUtils.configDb.toOption
+      properties <- configDb.get(Keys.javaProperties).getOrElse(Nil)
+    }
+      properties.foreach { opt =>
+        opt.stripPrefix("-D").split("=", 2).match {
+          case Array(key, value) => System.setProperty(key, value)
+          case _ => System.err.println(s"Warning: Invalid java property in config: $opt")
+        }
+      }
   }
 
   private def main0(args: Array[String]): Unit = {

modules/cli/src/main/scala/scala/cli/commands/config/Config.scala

@@ -16,14 +16,7 @@ import scala.cli.commands.publish.ConfigUtil.*
 import scala.cli.commands.shared.HelpGroup
 import scala.cli.commands.util.JvmUtils
 import scala.cli.commands.{ScalaCommand, SpecificationLevel}
-import scala.cli.config.{
-  ConfigDb,
-  Keys,
-  PasswordOption,
-  PublishCredentials,
-  RepositoryCredentials,
-  Secret
-}
+import scala.cli.config._
 import scala.cli.util.ArgHelpers.*
 import scala.cli.util.ConfigDbUtils
 object Config extends ScalaCommand[ConfigOptions] {
@@ -285,6 +278,8 @@ object Config extends ScalaCommand[ConfigOptions] {
                       else
                         values
 
+                    checkIfAskForUpdate(entry, finalValues, db, options)
+
                     db.setFromString(entry, finalValues)
                       .wrapConfigException
                       .orExit(logger)
@@ -298,4 +293,49 @@ object Config extends ScalaCommand[ConfigOptions] {
       }
     }
   }
+
+  /** Check whether to ask for an update depending on the provided key.
+    */
+  private def checkIfAskForUpdate(
+    entry: Key[_],
+    newValues: Seq[String],
+    db: ConfigDb,
+    options: ConfigOptions
+  ): Unit = entry match {
+    case listEntry: Key.StringListEntry =>
+      val previousValue = db.get(listEntry).wrapConfigException.orExit(logger).getOrElse(Nil)
+
+      confirmUpdateValue(
+        listEntry.fullName,
+        previousValue,
+        newValues,
+        options
+      ).wrapConfigException.orExit(logger)
+    case _ => ()
+  }
+
+  /** If the new value is different from the previous value, ask user for confirmation or suggest to
+    * use --force option. If the new value is the same as the previous value, confirm the operation.
+    * If force option is provided, skip the confirmation.
+    */
+  private def confirmUpdateValue(
+    keyFullName: String,
+    previousValues: Seq[String],
+    newValues: Seq[String],
+    options: ConfigOptions
+  ): Either[Exception, Unit] =
+    val (newValuesStr, previousValueStr) = (newValues.mkString(", "), previousValues.mkString(", "))
+    val shouldUpdate = !options.force && newValuesStr != previousValueStr && previousValues.nonEmpty
+
+    if shouldUpdate then
+      val interactive = options.global.logging.verbosityOptions.interactiveInstance()
+      val msg =
+        s"Do you want to change the key '$keyFullName' from '$previousValueStr' to '$newValuesStr'?"
+      interactive.confirmOperation(msg) match {
+        case Some(true) => Right(())
+        case _ => Left(new Exception(
+            s"Unable to change the value for the key: '$keyFullName' from '$previousValueStr' to '$newValuesStr' without the force flag. Please pass -f or --force to override."
+          ))
+      }
+    else Right(())
 }

modules/cli/src/main/scala/scala/cli/commands/config/ConfigOptions.scala

@@ -75,7 +75,13 @@ final case class ConfigOptions(
   @HelpMessage("For repository.credentials, whether to use these credentials should be passed upon redirection")
   @Tag(tags.restricted)
   @Tag(tags.inShortHelp)
-    passOnRedirect: Option[Boolean] = None
+    passOnRedirect: Option[Boolean] = None,
+  @Group(HelpGroup.Config.toString)
+  @HelpMessage("Force overwriting values for key")
+  @ExtraName("f")
+  @Tag(tags.inShortHelp)
+  @Tag(tags.should)
+    force: Boolean = false
 ) extends HasGlobalOptions
 // format: on
 

modules/config/src/main/scala/scala/cli/config/Keys.scala

@@ -126,6 +126,13 @@ object Keys {
       "Default repository, syntax: https://first-repo.company.com https://second-repo.company.com",
     specificationLevel = SpecificationLevel.RESTRICTED
   )
+  val javaProperties = new Key.StringListEntry(
+    prefix = Nil,
+    name = "java.properties",
+    description =
+      "Java properties",
+    specificationLevel = SpecificationLevel.SHOULD
+  )
 
   // Kept for binary compatibility
   val repositoriesMirrors = repositoryMirrors
@@ -161,6 +168,7 @@ object Keys {
     ghToken,
     globalInteractiveWasSuggested,
     interactive,
+    javaProperties,
     suppressDirectivesInMultipleFilesWarning,
     suppressOutdatedDependenciessWarning,
     suppressExperimentalFeatureWarning,

modules/docs-tests/src/main/scala/sclicheck/sclicheck.scala

@@ -284,6 +284,7 @@ def checkFile(file: os.Path, options: Options): Unit =
           }
       case Commands.Clear(_) =>
         os.list(out).filterNot(_ == binDir).foreach(os.remove.all)
+        os.remove(os.Path(sys.env("SCALA_CLI_CONFIG")))
 
   try
     println(Blue(s"\n[${file.relativeTo(os.pwd)}]  Running checks in $out"))

modules/integration/src/test/scala/scala/cli/integration/ConfigTests.scala

@@ -522,4 +522,42 @@ class ConfigTests extends ScalaCliSuite {
       }
   }
 
+  test("change value for key") {
+    val configFile              = os.rel / "config" / "config.json"
+    val configEnv               = Map("SCALA_CLI_CONFIG" -> configFile.toString)
+    val (props, props2, props3) = ("props=test", "props2=test2", "props3=test3")
+    val key                     = "java.properties"
+    TestInputs.empty.fromRoot { root =>
+      // set some values first time
+      os.proc(TestUtil.cli, "--power", "config", key, props, props2).call(
+        cwd = root,
+        env = configEnv
+      )
+
+      // override some values should throw error without force flag
+      val res = os.proc(TestUtil.cli, "--power", "config", key, props, props2, props3).call(
+        cwd = root,
+        env = configEnv,
+        check = false,
+        mergeErrIntoOut = true
+      )
+
+      expect(res.exitCode == 1)
+      expect(res.out.trim().contains("pass -f or --force"))
+
+      os.proc(TestUtil.cli, "--power", "config", key, props, props2, props3, "-f").call(
+        cwd = root,
+        env = configEnv,
+        check = false
+      )
+      val propertiesFromConfig = os.proc(TestUtil.cli, "--power", "config", key)
+        .call(cwd = root, env = configEnv)
+        .out.trim()
+
+      expect(propertiesFromConfig.contains(props))
+      expect(propertiesFromConfig.contains(props2))
+      expect(propertiesFromConfig.contains(props3))
+    }
+  }
+
 }

modules/integration/src/test/scala/scala/cli/integration/SipScalaTests.scala

@@ -32,7 +32,7 @@ class SipScalaTests extends ScalaCliSuite {
         os.proc(TestUtil.cli, "config", configKey, disableSetting)
           .call(cwd = root, env = homeEnv)
         testWhenDisabled(root, homeEnv)
-        os.proc(TestUtil.cli, "config", configKey, "true")
+        os.proc(TestUtil.cli, "config", configKey, "true", "-f")
           .call(cwd = root, env = homeEnv)
         testWhenEnabled(root, homeEnv)
       }

website/docs/commands/publishing/publish-setup.md

@@ -66,6 +66,8 @@ scala-cli --power config publish.user.email "[email protected]"
 scala-cli --power config publish.user.url "https://alex.me"
 ```
 
+<!-- clear -->
+
 The email can be left empty if you'd rather not put your email in POM files:
 ```bash
 scala-cli --power config publish.user.email ""

website/docs/reference/cli-options.md

@@ -207,6 +207,12 @@ For repository.credentials, whether to use these credentials are optional
 
 For repository.credentials, whether to use these credentials should be passed upon redirection
 
+### `--force`
+
+Aliases: `-f`
+
+Force overwriting values for key
+
 ## Cross options
 
 Available in commands:

website/docs/reference/commands.md

@@ -55,6 +55,7 @@ Available keys:
   - httpProxy.user                                 HTTP proxy user (used for authentication).
   - interactive                                    Globally enables interactive mode (the '--interactive' flag).
   - interactive-was-suggested                      Setting indicating if the global interactive mode was already suggested.
+  - java.properties                                Java properties
   - pgp.public-key                                 The PGP public key, used for signing.
   - pgp.secret-key                                 The PGP secret key, used for signing.
   - pgp.secret-key-password                        The PGP secret key password, used for signing.