Add logging and update validation

toolflow/src/main/scala/com/minres/tgc/hammer/Global.scala

@@ -1,6 +1,5 @@
 package com.minres.tgc.hammer
 
-import com.minres.tgc.hammer.FileUtils.*
 import os.Path
 
 object Global {

toolflow/src/main/scala/com/minres/tgc/hammer/Main.scala

@@ -11,7 +11,7 @@ object Main {
   var conf: HammerConf = uninitialized
 
   def main(args: Array[String]): Unit = {
-    var logger = Logger("TGCHammer")
+    val logger = Logger("TGCHammer")
     conf = new HammerConf(args.toIndexedSeq)
 
     val logLevel = conf.verbose() match {
@@ -22,14 +22,23 @@ object Main {
     }
     LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME).asInstanceOf[ch.qos.logback.classic.Logger].setLevel(logLevel)
 
-    os.makeDir(Global.OUT_DIR)
-    os.makeDir(Global.TMP_DIR)
+    logger.trace(s"Creating output directory ${Global.OUT_DIR}")
+    if (conf.emptyOutputDir()) os.remove.all(Global.OUT_DIR)
+    os.makeDir.all(Global.OUT_DIR)
+    logger.trace(s"Creating temp directory ${Global.TMP_DIR}")
+    os.makeDir.all(Global.TMP_DIR)
     conf.subcommand match {
       case Some(c: MySubcommand) =>
+        logger.info(s"Executing subcommand ${c.name}")
         val tasks = c.getRequiredTasks
+        logger.debug(s"Subcommand requires ${tasks.size} tasks")
+        logger.info(s"Validating tasks")
         tasks.foreach(_.validate())
+        logger.info(s"Executing tasks")
         tasks.foreach(_.execute())
       case _ =>
+        logger.error(s"Found no subcommand, see help below")
+        conf.printHelp()
     }
   }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/cli/HammerConf.scala

@@ -2,16 +2,25 @@ package com.minres.tgc.hammer.cli
 
 import org.rogach.scallop.*
 import os.Path
-import com.minres.tgc.hammer.FileUtils.*
+import com.minres.tgc.hammer.util.FileUtils.*
 
 class HammerConf(arguments: Seq[String]) extends ScallopConf(arguments) {
   val outputDirectory: ScallopOption[Path] = opt[Path](default = Some("output".path()), descr = "The base output directory")
-  val verbose: ScallopOption[Int] = tally()
+  val verbose: ScallopOption[Int] = tally(short = 'v', descr = "Controls the logging of tgc-hammer itself, using it multiple times (-vv) will print more. (0x => WARN, 1x => INFO, 2x => DEBUG, 3x => TRACE)")
+  val emptyOutputDir: ScallopOption[Boolean] = toggle(default = Some(true), descrYes = "Whether to empty the output directory at the start; defaults to true")
   addSubcommand(new LongnailCommand)
   addSubcommand(new TreenailCommand)
+  addSubcommand(new LongnailMergeCommand)
   addSubcommand(new LongnailSchedCommand)
 
-  requireSubcommand()
+  banner("""This program offers several subcommands to execute different tasks.
+           |The main subcommand to create the hardware module of an ISAX is `isaxHLS`.
+           |For more information about the several subcommands use `tgc-hammer subcommand --help` with the name of the respective subcommand.
+           |
+           |Usage: tgc-hammer isaxHLS -c VexRiscv --useMinIISolution isax.core_desc
+           |""".stripMargin)
+
+  shortSubcommandsHelp(true)
 
   verify()
 }

toolflow/src/main/scala/com/minres/tgc/hammer/cli/LongnailCommand.scala

@@ -1,19 +1,22 @@
 package com.minres.tgc.hammer.cli
 
-import com.minres.tgc.hammer.FileUtils.*
+import com.minres.tgc.hammer.util.FileUtils.*
 import com.minres.tgc.hammer.Global.*
 import com.minres.tgc.hammer.tasks.{Task, TreenailTask}
 import com.minres.tgc.hammer.tasks.longnail.{LongnailHLSTask, LongnailMergeTask, LongnailScheduleTask, SchedulingParameters}
+import com.minres.tgc.hammer.util.{Logging, ValidationUtils}
 import org.rogach.scallop.*
 import os.Path
 
 import scala.collection.mutable
 
-class LongnailCommand extends MySubcommand("isaxHLS") with CoreSelection {
+class LongnailCommand extends MySubcommand("isaxHLS") with CoreSelection with Logging[LongnailCommand] with ValidationUtils {
   val inputFiles: ScallopOption[List[Path]] = trailArg[List[Path]]("inputFiles", group = mainGroup, descr = "One or multiple input files; Both .core_desc as well as .mlir are supported (also mixed)")
   val useMinIISolution: ScallopOption[Boolean] = toggle(name = "useMinIISolution", group = mainGroup, default = Some(false), descrYes = "Whether to automatically choose the scheduling solution with the lowest II. If not activated, a manual selection during execution will be required!")
   val schedParams: SchedulingParameters = addConfigElement(new SchedulingParameters)
 
+  check(inputFiles)(checkPathsIsFile)
+
   banner(
     """Run the complete longnail flow from CoreDSL/MLIR to receive a SystemVerilog representation of the ISAXes
       |Usage: tgc-hammer isaxHLS -c VexRiscv --useMinIISolution isax.core_desc
@@ -34,11 +37,17 @@ class LongnailCommand extends MySubcommand("isaxHLS") with CoreSelection {
       tasks += LongnailMergeTask(allMlirFiles, concatInput, mergedInput)
       tasks += LongnailScheduleTask(mergedInput, getCoreDatasheet, schedParams)
     }
+    val verilogOutput = OUT_DIR / "verilog"
+    os.makeDir.all(verilogOutput)
     if (useMinIISolution()) {
-      tasks += LongnailHLSTask(schedParams.schedulingSolutionFile(), None, OUT_DIR)
+      tasks += LongnailHLSTask(schedParams.schedulingSolutionFile(), None, verilogOutput)
     } else {
       ???
     }
     tasks.toSeq
   }
+
+  override def cleanup(): Unit = {
+    log.info(s"Finished, verilog output in ${OUT_DIR / "verilog"}")
+  }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/cli/LongnailMergeCommand.scala

@@ -3,11 +3,12 @@ package com.minres.tgc.hammer.cli
 import com.minres.tgc.hammer.tasks.{CopyTask, Task, TreenailTask}
 import org.rogach.scallop.*
 import os.Path
-import com.minres.tgc.hammer.FileUtils.*
+import com.minres.tgc.hammer.util.FileUtils.*
 import com.minres.tgc.hammer.Global.*
 import com.minres.tgc.hammer.tasks.longnail.LongnailMergeTask
+import com.minres.tgc.hammer.util.{Logging, ValidationUtils}
 
-class LongnailMergeCommand extends MySubcommand("mergeISAX") {
+class LongnailMergeCommand extends MySubcommand("mergeISAX") with Logging[LongnailMergeCommand] with ValidationUtils {
   val inputFiles: ScallopOption[List[Path]] = trailArg[List[Path]]("inputFiles", group = mainGroup, descr = "One or multiple input files; Both .core_desc as well as .mlir are supported (also mixed)")
   val output: ScallopOption[Path] = opt[Path](short = 'o', default = Some("merged.mlir".path()), descr = "The .mlir file containing the merged ISAXes")
   val overwrite: ScallopOption[Boolean] = toggle()
@@ -19,16 +20,24 @@ class LongnailMergeCommand extends MySubcommand("mergeISAX") {
     val (coreDSLFiles, mlirFiles) = inputFiles().partition(_.ext == "core_desc")
 
     if (inputFiles().size == 1) {
+      log.debug(s"Only one input file, no merge required...")
       if (coreDSLFiles.size == 1) {
+        log.trace(s"CoreDSL input file, creating translation task to MLIR...")
         Seq(TreenailTask(coreDSLFiles.head, output()))
       } else {
+        log.trace(s"MLIR input file, creating copy task...")
         Seq(CopyTask(mlirFiles.head, output()))
       }
     } else {
+      log.debug(s"Multiple input files, creating translation tasks to MLIR and merge task...")
       val treenailTasks = coreDSLFiles.map(i => TreenailTask(i, TMP_DIR / s"${i.baseName}.mlir"))
       val allMlirFiles = mlirFiles ++ treenailTasks.map(_.output)
       val concatInput = TMP_DIR / "concat.mlir"
       treenailTasks :+ LongnailMergeTask(allMlirFiles, concatInput, output())
     }
   }
+
+  override def cleanup(): Unit = {
+    log.info(s"Finished, merged MLIR output in ${output()}")
+  }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/cli/LongnailSchedCommand.scala

@@ -1,17 +1,19 @@
 package com.minres.tgc.hammer.cli
 
-import com.minres.tgc.hammer.FileUtils.*
+import com.minres.tgc.hammer.util.FileUtils.*
 import com.minres.tgc.hammer.Global.*
 import com.minres.tgc.hammer.tasks.longnail.{LongnailMergeTask, LongnailScheduleTask}
 import com.minres.tgc.hammer.tasks.{Task, TreenailTask}
 import com.minres.tgc.hammer.tasks.longnail.SchedulingParameters
+import com.minres.tgc.hammer.util.{Logging, ValidationUtils}
 import org.rogach.scallop.*
 import os.Path
 
-class LongnailSchedCommand extends MySubcommand("scheduleISAX") with CoreSelection {
+class LongnailSchedCommand extends MySubcommand("scheduleISAX") with CoreSelection with Logging[LongnailSchedCommand] with ValidationUtils {
   val inputFiles: ScallopOption[List[Path]] = trailArg[List[Path]]("inputFiles", group = mainGroup, descr = "One or multiple input files; Both .core_desc as well as .mlir are supported (also mixed)")
   val schedParams: SchedulingParameters = addConfigElement(new SchedulingParameters)
 
+  check(inputFiles)(checkPathsIsFile)
 
   banner(
     """Generate Scheduling information for the provided ISAXes using Longnail
@@ -19,15 +21,23 @@ class LongnailSchedCommand extends MySubcommand("scheduleISAX") with CoreSelecti
       |""".stripMargin)
 
   override def getRequiredTasks: Seq[Task] = {
+    log.debug(s"Creating translation task to MLIR for CoreDSL inputs...")
     val (coreDSLFiles, mlirFiles) = inputFiles().partition(_.ext == "core_desc")
     val treenailTasks = coreDSLFiles.map(i => TreenailTask(i, TMP_DIR / s"${i.baseName}.mlir"))
     val allMlirFiles = mlirFiles ++ treenailTasks.map(_.output)
     if (allMlirFiles.size == 1) {
+      log.debug(s"Single input file, only creating schedule task...")
       treenailTasks :+ LongnailScheduleTask(allMlirFiles.head, getCoreDatasheet, schedParams)
     } else {
       val mergedInput = TMP_DIR / "merged.mlir"
       val concatInput = TMP_DIR / "concat.mlir"
+      log.debug(s"Multiple input files, creating merge and schedule task...")
       treenailTasks :+ LongnailMergeTask(allMlirFiles, concatInput, mergedInput) :+ LongnailScheduleTask(mergedInput, getCoreDatasheet, schedParams)
     }
   }
+
+  override def cleanup(): Unit = {
+    log.info(s"Finished, scheduling solutions in ${schedParams.schedulingSolutionFile()}")
+    log.info(s"Scheduling selection file (KConf) in ${schedParams.schedule.schedulingSelectionFile()}")
+  }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/cli/MySubcommand.scala

@@ -3,55 +3,28 @@ package com.minres.tgc.hammer.cli
 import com.minres.tgc.hammer.options.ConfigElement
 import com.minres.tgc.hammer.tasks.Task
 import org.rogach.scallop.{ScallopOption, ScallopOptionGroup, Subcommand, Util}
+import com.minres.tgc.hammer.util.{Checker, ValidationBase}
 
-type Checker[T] = ScallopOption[T] => Either[String,Unit]
-
-abstract class MySubcommand(name: String) extends Subcommand(name) {
+abstract class MySubcommand(val name: String) extends Subcommand(name) with ValidationBase[ScallopOption] {
   protected val mainGroup: ScallopOptionGroup = group()
 
   def getRequiredTasks: Seq[Task]
+  def cleanup(): Unit
 
   def addConfigElement[T <: ConfigElement](elem: T): T = {
     elem.init(this, null)
     elem
   }
 
-  def checkPred[T](option: ScallopOption[T], predicate: T => Boolean, format: String): Either[String,Unit] = {
-    option.toOption.map {
-      case o if predicate(o) => (Right(()))
-      case o => Left(Util.format(format, o))
-    }.getOrElse(Right(()))
+
+  def check[T](option: ScallopOption[T])(check: Checker[T]): Unit = {
+    addValidation(check(option))
   }
 
-  def checkPredIt[T, CC <: Iterable](option: ScallopOption[CC[T]], predicate: T => Boolean, format: String): Either[String,Unit] = {
-    option.toOption.map(options => {
-      val problems = options.filterNot(predicate)
-      problems match {
-        case Nil => Right(())
-        case problem :: Nil => Left(Util.format(format, problem))
-        case _ => Left(s"Multiple: ${Util.format(format, problems.mkString(", "))}")
-      }
-    }).getOrElse(Right(()))
-  }
-
-  def checkPathExists: Checker[os.Path] = path => checkPred(path, os.exists, "File '%s' does not exist")
-  def checkPathDoesNotExist: Checker[os.Path] = path => checkPred(path, !os.exists(_), "File '%s' already exists")
-  def checkPathIsFile: Checker[os.Path] = path => checkPred(path, os.isFile, "File '%s' is not a file")
-  def checkPathIsDir: Checker[os.Path] = path => checkPred(path, os.isDir, "File '%s' is not a directory")
-
-  
-  def checkPathsExists: Checker[List[os.Path]] = path => checkPredIt(path, os.exists, "File(s) '%s' do not exist")
-  def checkPathsDoesNotExists: Checker[List[os.Path]] = path => checkPredIt(path, !os.exists(_), "File(s) '%s' already exist")
-  def checkPathsIsFile: Checker[List[os.Path]] = path => checkPredIt(path, os.isFile, "File(s) '%s' are not files")
-  def checkPathsIsDir: Checker[List[os.Path]] = path => checkPredIt(path, os.isDir, "File(s) '%s' are not directories")
-
-  def check[T](option: ScallopOption[T])(check: Checker[T]): Unit = addValidation(check(option))
   def checkPred[T, U](condOpt: ScallopOption[U], cond: U => Boolean)(option: ScallopOption[T])(check: Checker[T]): Unit = addValidation {
     condOpt.toOption match {
       case Some(value) if cond(value) => check(option)
       case _ => Right(())
     }
   }
-  def checkIf[T](condOpt: ScallopOption[Boolean])(option: ScallopOption[T])(check: Checker[T]): Unit = checkPred(condOpt, identity)(option)(check)
-  def checkNotIf[T](condOpt: ScallopOption[Boolean])(option: ScallopOption[T])(check: Checker[T]): Unit = checkPred(condOpt, !_)(option)(check)
 }

toolflow/src/main/scala/com/minres/tgc/hammer/cli/TreenailCommand.scala

@@ -1,16 +1,18 @@
 package com.minres.tgc.hammer.cli
 
-import com.minres.tgc.hammer.FileUtils.*
+import com.minres.tgc.hammer.util.FileUtils.*
 import com.minres.tgc.hammer.tasks.{Task, TreenailTask}
+import com.minres.tgc.hammer.util.{Logging, ValidationUtils}
 import org.rogach.scallop.*
 import os.Path
 
-class TreenailCommand extends MySubcommand("parseCoreDSL") {
+class TreenailCommand extends MySubcommand("parseCoreDSL") with Logging[TreenailCommand] with ValidationUtils {
   val coreDSL: ScallopOption[Path] = trailArg[Path]("coreDSL", descr = "The .core_desc input file to be converted")
   val output: ScallopOption[Path] = opt[Path](short = 'o', default = Some("isax.mlir".path()), descr = "The .mlir file containing the converted ISAX")
   val overwrite: ScallopOption[Boolean] = toggle()
 
   check(coreDSL)(checkPathIsFile)
+  check(coreDSL)(checkPathIsCoreDSL)
   checkNotIf(overwrite)(output)(checkPathDoesNotExist)
 
   banner(
@@ -23,4 +25,8 @@ class TreenailCommand extends MySubcommand("parseCoreDSL") {
       TreenailTask(coreDSL(), output())
     )
   }
+
+  override def cleanup(): Unit = {
+    log.info(s"Finished, MLIR output in ${output()}")
+  }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/options/BaseOption.scala

@@ -7,7 +7,7 @@ import scala.compiletime.uninitialized
 
 trait BaseOption[T](using conv: ValueConverter[T]) extends ConfigElement {
   protected def createScallop(conf: ScallopConf, group: ScallopOptionGroup): ScallopOption[T]
-  private var scallop: ScallopOption[T] = uninitialized
+  protected[options] var scallop: ScallopOption[T] = uninitialized
   def init(scallopConf: ScallopConf, group: ScallopOptionGroup): Unit = {
     scallop = createScallop(scallopConf, group)
   }

toolflow/src/main/scala/com/minres/tgc/hammer/options/CommandGroup.scala

@@ -11,5 +11,6 @@ class CommandGroup(name: String) extends BaseGroup {
 
   override def init(scallopConf: ScallopConf, group: ScallopOptionGroup): Unit = {
     options.foreach(_.init(scallopConf, group))
+    initValidation(scallopConf)
   }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/options/OptionGroup.scala

@@ -1,18 +1,39 @@
 package com.minres.tgc.hammer.options
 
 
+import com.minres.tgc.hammer.util.{Checker, ValidationBase, ValidationUtils}
 import org.rogach.scallop.{ScallopConf, ScallopOptionGroup, ValueConverter}
 import os.Shellable
 
 import scala.collection.mutable
 
-trait BaseGroup extends ConfigElement {
+trait BaseGroup extends ConfigElement with ValidationBase[BaseOption] with ValidationUtils {
   protected val options = mutable.ListBuffer[ConfigElement]()
   protected def add[T <: ConfigElement](option: T): T = {
     options += option
     option
   }
 
+  def initValidation(scallopConf: ScallopConf): Unit = {
+    validations.foreach(fn => scallopConf.addValidation(fn()))
+  }
+
+  private var validations: List[() => Either[String, Unit]] = Nil
+
+  private def addValidation(fn: () => Either[String, Unit]): Unit = {
+    validations :+= fn
+  }
+
+  def check[T](option: BaseOption[T])(check: Checker[T]): Unit = {
+    addValidation(() => check(option.scallop))
+  }
+  def checkPred[T, U](condOpt: BaseOption[U], cond: U => Boolean)(option: BaseOption[T])(check: Checker[T]): Unit = addValidation { () =>
+    condOpt.scallop.toOption match {
+      case Some(value) if cond(value) => check(option.scallop)
+      case _ => Right(())
+    }
+  }
+
   def value[T](cliName: String, toolName: String, descr: String = "", default: => Option[T] = None, required: Boolean = false, cliShort: Char = '\u0000')(using conv: ValueConverter[T]): ValueOption[T] = add(ValueOption(cliName, toolName, descr, default, required, cliShort))
   def valueS[T](name: String, descr: String = "", default: => Option[T] = None, required: Boolean = false, cliShort: Char = '\u0000')(using conv: ValueConverter[T]): ValueOption[T] = add(ValueOption(name, name, descr, default, required, cliShort))
 
@@ -36,5 +57,6 @@ trait OptionGroup extends BaseGroup {
   def init(scallopConf: ScallopConf, g: ScallopOptionGroup): Unit = {
     val group = scallopConf.group(name)
     options.foreach(_.init(scallopConf, group))
+    initValidation(scallopConf)
   }
 }

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/CopyTask.scala

@@ -4,7 +4,7 @@ import os.*
 
 case class CopyTask(from: Path, to: Path) extends Task {
   override def validate(): Unit = {
-
+    assert(isFile(from), "Input file does not exist")
   }
 
   override def execute(): Unit = {

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/Task.scala

@@ -1,8 +1,9 @@
 package com.minres.tgc.hammer.tasks
 
+import com.minres.tgc.hammer.util.Logging
 import os.{Path, Shellable}
 
-trait Task {
+trait Task extends Logging[Task] {
   def validate(): Unit
   def execute(): Unit
 

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/TreenailTask.scala

@@ -1,7 +1,7 @@
 package com.minres.tgc.hammer.tasks
 
 import com.minres.tgc.hammer.Global
-
+import com.minres.tgc.hammer.util.FileUtils.*
 import os.*
 
 case class TreenailTask(coreDSLInput: Path, output: Path) extends Task {
@@ -9,6 +9,7 @@ case class TreenailTask(coreDSLInput: Path, output: Path) extends Task {
 
   override def validate(): Unit = {
     assert(isFile(EXECUTABLE), "Treenail Executable is missing, build Treenail")
+    assert(isCoreDSLFile(coreDSLInput), "Input file does not exist")
   }
   override def execute(): Unit = {
     runExecutable(EXECUTABLE, "-o", output, coreDSLInput)

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/LongnailHLSTask.scala

@@ -1,10 +1,14 @@
 package com.minres.tgc.hammer.tasks.longnail
 
-import os.Path
+import com.minres.tgc.hammer.util.FileUtils.*
+import os.*
 
 class LongnailHLSTask(schedulingSolutionFile: Path, schedulingSelectionFile: Option[Path], outDirectory: Path) extends LongnailBaseTask {
   override def validate(): Unit = {
     super.validate()
+    assert(isMLIRFile(schedulingSolutionFile), "Scheduling solution file does not exist")
+    schedulingSelectionFile.foreach(f => assert(isFile(f), "Scheduling selection file does not exist"))
+    assert(isDir(outDirectory), "Output directory does not exist")
   }
 
   override def execute(): Unit = {

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/LongnailMergeTask.scala

@@ -1,10 +1,12 @@
 package com.minres.tgc.hammer.tasks.longnail
 
-import os.Path
+import com.minres.tgc.hammer.util.FileUtils.*
+import os.*
 
 class LongnailMergeTask(mlirFiles: Seq[Path], concatMLIR: Path, mergedMLIR: Path) extends LongnailBaseTask {
   override def validate(): Unit = {
     super.validate()
+    mlirFiles.foreach(f => assert(f.isMLIRFile, s"Input file $f does not exist or is not an MLIR file"))
   }
 
   override def execute(): Unit = {

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/LongnailScheduleTask.scala

@@ -1,33 +1,18 @@
 package com.minres.tgc.hammer.tasks.longnail
 
-import com.minres.tgc.hammer.options.*
 import com.minres.tgc.hammer.tasks.longnail.LongnailBaseTask
-import os.Path
+import com.minres.tgc.hammer.util.FileUtils.isMLIRFile
+import os.*
 
 class LongnailScheduleTask(isaxMLIR: Path, coreDatasheet: Path, params: SchedulingParameters) extends LongnailBaseTask {
 
   override def validate(): Unit = {
     super.validate()
+    assert(isMLIRFile(isaxMLIR), "Input file does not exist")
+    assert(isFile(coreDatasheet), "Core datasheet does not exist")
   }
 
   override def execute(): Unit = {
-    /*runExecutable(EXECUTABLE,
-      "--lower-coredsl-to-lil",
-      "--max-unroll-factor", params.maxLoopUnrollFactor,
-      "--schedule-lil",
-      "--datasheet", params.base.coreDatasheet,
-      "--library", params.base.cellLibrary,
-      "--opTyLibrary", params.base.opTyLibrary,
-      "--clockTime", params.base.clockPeriod,
-      "--schedulingAlgo", params.base.schedulingAlgo,
-      "--solver", params.base.ilpSolver,
-      "--schedulingTimeout", params.schedulingTimeout,
-      "--schedRefineTimeout", params.schedulingRefineTimeout,
-      "--solSelKconfPath", params.schedulingKconf,
-      "--verbose", params.base.verbose.toString,
-      "-o", params.schedulingMLIR,
-      isaxMLIR
-    )*/
     runExecutable(EXECUTABLE,
       "--lower-coredsl-to-lil",
       params.getToolParameters,

toolflow/src/main/scala/com/minres/tgc/hammer/tasks/longnail/SchedulingParameters.scala

@@ -1,6 +1,6 @@
 package com.minres.tgc.hammer.tasks.longnail
 
-import com.minres.tgc.hammer.FileUtils.*
+import com.minres.tgc.hammer.util.FileUtils.*
 import com.minres.tgc.hammer.Global.OUT_DIR
 import com.minres.tgc.hammer.options.*
 import org.rogach.scallop.*
@@ -9,22 +9,26 @@ import os.Path
 class SchedulingParameters extends OptionGroup {
   override def name: String = "Longnail Scheduling Args"
 
-  add(new CommandGroup("--prepare-schedule-lil") {
-    choiceS(Seq("LEGACY", "MS", "PAMS", "PARAMS", "MI_MS", "MI_PAMS", "MI_PARAMS"), name = "schedulingAlgo", default = Some("LEGACY"), descr =
+  class PrepareOptions extends CommandGroup("--prepare-schedule-lil") {
+    val schedulingAlgo = choiceS(Seq("LEGACY", "MS", "PAMS", "PARAMS", "MI_MS", "MI_PAMS", "MI_PARAMS"), name = "schedulingAlgo", default = Some("LEGACY"), descr =
       "Scheduling algorithm used by Longnail; Modulo Scheduling (MS) can be extended with Predicate-aware (PA) and Resource-aware (RA), Inter-Instruction sharing is activated in the MI variants")
-    value[Path](cliName = "cellLibrary", toolName = "library", descr = "The cell library used by Longnail (example: longnail/test/LILToHW/longnail*.yaml")
-    valueS[Path](name = "opTyLibrary", descr = "The operator type model used for detailed data (e.g. from OL SKY130 in longnail/opTyLibraries/OL2.yaml)")
-  })
-
-  add(new CommandGroup("--schedule-lil") {
-    valueS[Int](name = "schedulingTimeout", default = Some(10), descr = "Longnail scheduling timeout in seconds")
-    value[Int](cliName = "schedulingRefineTimeout", toolName = "schedRefineTimeout", default = Some(10), descr = "Longnail schedule refinement timeout in seconds")
-    value[Path](cliName = "schedulingKconf", toolName = "solSelKconfPath", default = Some(OUT_DIR / "scheduling.KConfig"), descr = "Path for the created KConfig file for selecting a scheduling solution")
-    choice(Seq("CBC", "GLPK", "SCIP", "HIGHS", "GUROBI", "CPLEX", "XPRESS", "COPT"), cliName = "ilpSolver", toolName = "solver", default = Some("CBC"), descr = "The ILP solver used by Longnail; currently only CBC is tested")
-    toggle(cliName = "verboseSched", toolName = "verbose", descr = "Enable verbose ILP solver messages")
-    value[Int](cliName = "clockPeriod", toolName = "clockTime", descr = "The target clock period; uses same time unit as delays in opTyLibrary")
-  })
-
-  value[Int](cliName = "--maxLoopUnrollFactor", toolName = "max-unroll-factor", default = Some(16), descr = "Longnail max loop unroll factor")
-  val schedulingSolutionFile: ValueOption[Path] = value[Path](cliName = "--schedulingMLIR", toolName = "o", default = Some(OUT_DIR / "scheduling_solutions.mlir"), descr = "Output file with different scheduling solutions")
+    val cellLibrary = value[Path](cliName = "cellLibrary", toolName = "library", descr = "The cell library used by Longnail (example: longnail/test/LILToHW/longnail*.yaml")
+    val opTyLibrary = valueS[Path](name = "opTyLibrary", descr = "The operator type model used for detailed data (e.g. from OL SKY130 in longnail/opTyLibraries/OL2.yaml)")
+    check(cellLibrary)(checkPathIsFile)
+    check(opTyLibrary)(checkPathIsFile)
+  }
+  val prepare = add(new PrepareOptions)
+
+  class ScheduleOptions extends CommandGroup("--schedule-lil") {
+    val schedulingTimeout = valueS[Int](name = "schedulingTimeout", default = Some(10), descr = "Longnail scheduling timeout in seconds")
+    val schedulingRefineTimeout = value[Int](cliName = "schedulingRefineTimeout", toolName = "schedRefineTimeout", default = Some(10), descr = "Longnail schedule refinement timeout in seconds")
+    val schedulingSelectionFile = value[Path](cliName = "schedulingKconf", toolName = "solSelKconfPath", default = Some(OUT_DIR / "scheduling.KConfig"), descr = "Path for the created KConfig file for selecting a scheduling solution")
+    val ilpSolver = choice(Seq("CBC", "GLPK", "SCIP", "HIGHS", "GUROBI", "CPLEX", "XPRESS", "COPT"), cliName = "ilpSolver", toolName = "solver", default = Some("CBC"), descr = "The ILP solver used by Longnail; currently only CBC is tested")
+    val verboseSched = toggle(cliName = "verboseSched", toolName = "verbose", descr = "Enable verbose ILP solver messages")
+    val clockPeriod = value[Int](cliName = "clockPeriod", toolName = "clockTime", descr = "The target clock period; uses same time unit as delays in opTyLibrary")
+  }
+  val schedule = add(new ScheduleOptions)
+
+  val maxLoopUnrollFactor = value[Int](cliName = "--maxLoopUnrollFactor", toolName = "max-unroll-factor", default = Some(16), descr = "Longnail max loop unroll factor")
+  val schedulingSolutionFile = value[Path](cliName = "--schedulingMLIR", toolName = "o", default = Some(OUT_DIR / "scheduling_solutions.mlir"), descr = "Output file with different scheduling solutions")
 }

toolflow/src/main/scala/com/minres/tgc/hammer/util/FileUtils.scala

@@ -1,8 +1,8 @@
-package com.minres.tgc.hammer
+package com.minres.tgc.hammer.util
 
+import com.minres.tgc.hammer.Global.BASE_DIR
 import org.rogach.scallop.{ScallopOption, Util, ValueConverter, listArgConverter, singleArgConverter}
 import os.*
-import Global.*
 
 import scala.collection.IterableOps
 
@@ -13,6 +13,10 @@ object FileUtils {
     path / os.up / newName
   }
 
+  extension (x: os.Path)
+    def isMLIRFile: Boolean = isFile(x) && x.ext == "mlir"
+    def isCoreDSLFile: Boolean = isFile(x) && x.ext == "core_desc"
+
   extension (x: String)
     def asPath(relative: Path): Path = {
       Path(x, relative)
@@ -31,4 +35,5 @@ object FileUtils {
   implicit val osPathRelBaseListConverter: ValueConverter[List[Path]] = {
     listArgConverter[Path](_.asPath(BASE_DIR))
   }
+
 }

toolflow/src/main/scala/com/minres/tgc/hammer/util/Logging.scala

@@ -0,0 +1,13 @@
+package com.minres.tgc.hammer.util
+
+import com.typesafe.scalalogging.Logger
+
+import scala.reflect.ClassTag
+
+trait Logging[T: ClassTag] {
+  protected val log: Logger = Logger[T]
+
+  protected def assert(boolean: Boolean, msg: String): Unit = {
+    if (!boolean) log.error(msg)
+  }
+}

toolflow/src/main/scala/com/minres/tgc/hammer/util/ValidationBase.scala

@@ -0,0 +1,10 @@
+package com.minres.tgc.hammer.util
+
+import org.rogach.scallop.ScallopOption
+
+trait ValidationBase[O[_]] {
+  def check[T](option: O[T])(check: Checker[T]): Unit
+  def checkPred[T, U](condOpt: O[U], cond: U => Boolean)(option: O[T])(check: Checker[T]): Unit
+  def checkIf[T](condOpt: O[Boolean])(option: O[T])(check: Checker[T]): Unit = checkPred(condOpt, identity)(option)(check)
+  def checkNotIf[T](condOpt: O[Boolean])(option: O[T])(check: Checker[T]): Unit = checkPred(condOpt, !_)(option)(check)
+}

toolflow/src/main/scala/com/minres/tgc/hammer/util/ValidationUtils.scala

@@ -0,0 +1,44 @@
+package com.minres.tgc.hammer.util
+
+import org.rogach.scallop.{ScallopOption, Util}
+
+
+type Checker[T] = ScallopOption[T] => Either[String,Unit]
+
+trait ValidationUtils { this: ValidationBase[?] =>
+
+
+  private def checkPredicate[T](option: ScallopOption[T], predicate: T => Boolean, format: String): Either[String,Unit] = {
+    option.toOption.map {
+      case o if predicate(o) => Right(())
+      case o => Left(Util.format(format, o))
+    }.getOrElse(Right(()))
+  }
+
+  private def checkPredicateIt[T, CC <: Iterable](option: ScallopOption[CC[T]], predicate: T => Boolean, format: String): Either[String,Unit] = {
+    option.toOption.map(options => {
+      val problems = options.filterNot(predicate)
+      problems match {
+        case Nil => Right(())
+        case problem :: Nil => Left(Util.format(format, problem))
+        case _ => Left(s"Multiple: ${Util.format(format, problems.mkString(", "))}")
+      }
+    }).getOrElse(Right(()))
+  }
+
+  def checkPathExists: Checker[os.Path] = path => checkPredicate(path, os.exists, "File '%s' does not exist")
+  def checkPathDoesNotExist: Checker[os.Path] = path => checkPredicate(path, !os.exists(_), "File '%s' already exists")
+  def checkPathIsFile: Checker[os.Path] = path => checkPredicate(path, os.isFile, "File '%s' is not a file")
+  def checkPathIsDir: Checker[os.Path] = path => checkPredicate(path, os.isDir, "File '%s' is not a directory")
+
+
+  def checkPathsExists: Checker[List[os.Path]] = path => checkPredicateIt(path, os.exists, "File(s) '%s' do not exist")
+  def checkPathsDoesNotExists: Checker[List[os.Path]] = path => checkPredicateIt(path, !os.exists(_), "File(s) '%s' already exist")
+  def checkPathsIsFile: Checker[List[os.Path]] = path => checkPredicateIt(path, os.isFile, "File(s) '%s' are not files")
+  def checkPathsIsDir: Checker[List[os.Path]] = path => checkPredicateIt(path, os.isDir, "File(s) '%s' are not directories")
+
+  def checkPathIsCoreDSL: Checker[os.Path] = path => checkPredicate(path, p => p.ext == "core_desc", "File '%s' is not a CoreDSL file")
+
+
+
+}