improvements for NimScript support

compiler/nimconf.nim

@@ -226,15 +226,7 @@ proc getSystemConfigPath(filename: string): string =
     if not existsFile(result): result = "/etc/" & filename
 
 proc loadConfigs*(cfg: string) =
-  # set default value (can be overwritten):
-  if libpath == "": 
-    # choose default libpath:
-    var prefix = getPrefixDir()
-    when defined(posix):
-      if prefix == "/usr": libpath = "/usr/lib/nim"
-      elif prefix == "/usr/local": libpath = "/usr/local/lib/nim"
-      else: libpath = joinPath(prefix, "lib")
-    else: libpath = joinPath(prefix, "lib")
+  setDefaultLibpath()
 
   if optSkipConfigFile notin gGlobalOptions:
     readConfigFile(getSystemConfigPath(cfg))

compiler/options.nim

@@ -191,6 +191,17 @@ proc getPrefixDir*(): string =
   else:
     result = splitPath(getAppDir()).head
 
+proc setDefaultLibpath*() =
+  # set default value (can be overwritten):
+  if libpath == "":
+    # choose default libpath:
+    var prefix = getPrefixDir()
+    when defined(posix):
+      if prefix == "/usr": libpath = "/usr/lib/nim"
+      elif prefix == "/usr/local": libpath = "/usr/local/lib/nim"
+      else: libpath = joinPath(prefix, "lib")
+    else: libpath = joinPath(prefix, "lib")
+
 proc canonicalizePath*(path: string): string =
   when not FileSystemCaseSensitive: result = path.expandFilename.toLower
   else: result = path.expandFilename

lib/system/nimscript.nim

@@ -157,8 +157,8 @@ var
     binDir*, backend*: string
 
   skipDirs*, skipFiles*, skipExt*, installDirs*, installFiles*,
-    installExt*, bin*: seq[string]
-  requiresData*: seq[string]
+    installExt*, bin*: seq[string] = @[]
+  requiresData*: seq[string] = @[]
 
 proc requires*(deps: varargs[string]) =
   for d in deps: requiresData.add(d)