Merge pull request #111 from fox0430/addCmdOp

[WIP] Add command line option. -v and --version

src/moe.nim

@@ -11,13 +11,16 @@ import moepkg/editorview
 import moepkg/gapbuffer
 import moepkg/independentutils
 import moepkg/unicodeext
+import moepkg/cmdoption
 
 when isMainModule:
+  let parsedList = parseCommandLineOption(commandLineParams())
+
   startUi()
 
   var status = initEditorStatus()
-  if commandLineParams().len >= 1:
-    status.filename = commandLineParams()[0].toRunes
+  if parsedList.filename != "":
+    status.filename = parsedList.filename.toRunes
     if existsFile($(status.filename)):
       try:
         let textAndEncoding = openFile(status.filename)

src/moepkg/cmdoption.nim

@@ -0,0 +1,21 @@
+import parseopt, unicode
+
+type
+  ComdParsedList* = tuple[
+    filename: string 
+  ]
+
+proc parseCommandLineOption*(line: seq[string]): ComdParsedList  =
+  result.filename = ""
+  var parsedLine = initOptParser(line)
+  for kind, key, val in parsedLine.getopt():
+    case kind:
+      of cmdArgument:
+        result.filename = key
+      of cmdShortOption, cmdLongOption:
+        case key:
+          of "v", "version":
+            echo "v0.0.35"
+            quit()
+      of cmdEnd:
+        assert(false)