Refactored a lot of code -- split many functions into separate module.

tools.nim

@@ -0,0 +1,30 @@
+# Copyright (C) Dominik Picheta. All rights reserved.
+# BSD License. Look at license.txt for more info.
+#
+# Various miscellaneous utility functions reside here.
+import osproc, pegs, strutils, os
+import version
+
+proc getNimrodVersion*: TVersion =
+  let vOutput = execProcess("nimrod -v")
+  var matches: array[0..MaxSubpatterns, string]
+  if vOutput.find(peg"'Version'\s{(\d\.)+\d}", matches) == -1:
+    quit("Couldn't find Nimrod version.", QuitFailure)
+  newVersion(matches[0])
+
+proc samePaths*(p1, p2: string): bool =
+  ## Normalizes path (by adding a trailing slash) and compares.
+  let cp1 = if not p1.endsWith("/"): p1 & "/" else: p1
+  let cp2 = if not p2.endsWith("/"): p2 & "/" else: p2
+  return cmpPaths(cp1, cp2) == 0
+
+proc changeRoot*(origRoot, newRoot, path: string): string =
+  ## origRoot: /home/dom/
+  ## newRoot:  /home/test/
+  ## path:     /home/dom/bar/blah/2/foo.txt
+  ## Return value -> /home/test/bar/blah/2/foo.txt
+  if path.startsWith(origRoot):
+    return newRoot / path[origRoot.len .. -1]
+  else:
+    raise newException(EInvalidValue,
+      "Cannot change root of path: Path does not begin with original root.")