koch: 'update' feature optional for less dependencies

koch.nim

@@ -11,7 +11,10 @@ when defined(gcc) and defined(windows):
   {.link: "icons/koch.res".}
 
 import
-  os, strutils, parseopt, osproc, httpclient, streams
+  os, strutils, parseopt, osproc, streams
+
+when defined(withUpdate):
+  import httpclient
 when defined(haveZipLib):
   import zipfiles
 
@@ -37,6 +40,7 @@ Possible Commands:
   inno [options]           builds the Inno Setup installer (for Windows)
   tests                    run the testsuite
   update                   updates nimrod to the latest version from github
+                           (compile koch with -d:withUpdate to enable)
 Boot options:
   -d:release               produce a release version of the compiler
   -d:tinyc                 include the Tiny C backend (not supported on Windows)
@@ -183,7 +187,11 @@ proc clean(args: string) =
 
 # -------------- update -------------------------------------------------------
 
-proc update(args: string) =
+when defined(withUpdate):
+  when defined(windows):
+    {.warning: "Windows users: Make sure to run 'koch update' in Bash.".}
+
+  proc update(args: string) =
     when defined(windows):
       echo("Windows users: Make sure to be running this in Bash. ",
            "If you aren't, press CTRL+C now.")
@@ -268,7 +276,11 @@ of cmdArgument:
   of "inno": inno(op.cmdLineRest)
   of "install": install(op.cmdLineRest)
   of "test", "tests": tests(op.cmdLineRest)
-  of "update": update(op.cmdLineRest)
+  of "update": 
+    when defined(withUpdate):
+      update(op.cmdLineRest)
+    else:
+      quit "this Koch has not been compiled with -d:withUpdate"
   else: showHelp()
 of cmdEnd: showHelp()