[wip] implements lowerer

src/lowerer/lowerer.nim

@@ -0,0 +1,52 @@
+#
+#
+#           lowerer Compiler
+#        (c) Copyright 2024 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+
+import std / [parseopt, strutils, os, osproc, tables, assertions, syncio]
+import transformer
+
+const
+  Version = "0.2"
+  Usage = "lowerer Compiler. Version " & Version & """
+
+  (c) 2024 Andreas Rumpf
+Usage:
+  lowerer [options] [command]
+Command:
+  file.nif      lower NIF file to meet gear3's requirements
+
+Options:
+  --version                 show the version
+  --help                    show this help
+"""
+
+proc writeHelp() = quit(Usage, QuitSuccess)
+proc writeVersion() = quit(Version & "\n", QuitSuccess)
+
+proc handleCmdLine*() =
+  var files: seq[string] = @[]
+  for kind, key, val in getopt():
+    case kind
+    of cmdArgument:
+      files.add key
+    of cmdLongOption, cmdShortOption:
+      case normalize(key)
+      of "help", "h": writeHelp()
+      of "version", "v": writeVersion()
+      else: writeHelp()
+    of cmdEnd: assert false, "cannot happen"
+  if files.len > 1:
+    quit "too many arguments given, seek --help"
+  elif files.len == 0:
+    writeHelp()
+  else:
+    transformCode files[0]
+
+when isMainModule:
+  handleCmdLine()

src/lowerer/nim.cfg

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+--path: "../lib"