Slight dependency error message tweak.

installer.nim

@@ -30,8 +30,8 @@ proc dependExists(name: string, verRange: PVersionRange): Bool =
   if name == "nimrod":
     var nimVer = getNimVersion()
     if not withinRange(newVersion(nimVer), verRange):
-      raise newException(EInstall, "Nimrod version(" & 
+      raise newException(EInstall, "Nimrod version doesn't satisfy dependency: " &
-                         nimVer & ") doesn't satisfy dependency")
+                         nimVer & " " & $verRange)
     else: return True
   else:
     for kind, path in walkDir(getBabelDir() / "lib"):

version.nim

@@ -121,6 +121,23 @@ proc parseVersionRange*(s: string): PVersionRange =
       raise newException(EParseVersion, "Unexpected char in version range: " & s[i])
     inc(i)
 
+proc `$`*(verRange: PVersionRange): String =
+  case verRange.kind
+  of verLater:
+    result = "> "
+  of verEarlier:
+    result = "< "
+  of verEqLater:
+    result = ">= "
+  of verEqEarlier:
+    result = "<= "
+  of verIntersect:
+    result = $verRange.verILeft & " & " & $verRange.verIRight
+  of verAny:
+    return "Any"
+
+  result.add(string(verRange.ver))
+
 when isMainModule:
   assert(newVersion("1.0") < newVersion("1.4"))
   assert(newVersion("1.0.1") > newVersion("1.0"))