Merge pull request #51 from gradha/pr_compile_with_stable_compiler

Compile with stable compiler

babel.babel

@@ -9,4 +9,4 @@ bin = "babel"
 srcDir = "src"
 
 [Deps]
-Requires: "nimrod >= 0.9.5"
+Requires: "nimrod >= 0.9.4"

readme.markdown

@@ -10,9 +10,9 @@ package creation.
 
 ## Installation
 
-You will need development version 0.9.5 of the [Nimrod compiler from
-GitHub](https://github.com/Araq/Nimrod). To run babel you will need to have
-installed some of the tools it depends on to check out source code. For
+You will need version 0.9.4 (or better) of the [Nimrod
+compiler](http://nimrod-lang.org/download.html). To run babel you will need to
+have installed some of the tools it depends on to check out source code. For
 instance, if a package is hosted on [Github](https://github.com) you require to
 have [git](http://www.git-scm.com) installed and added to your environment
 ``PATH``. Same goes for [Mercurial](http://mercurial.selenic.com) repositories

src/babel.nim

@@ -6,8 +6,8 @@ import httpclient, parseopt, os, strutils, osproc, pegs, tables, parseutils,
 
 from sequtils import toSeq
 
-import babelpkg/packageinfo, babelpkg/version, babelpkg/tools, babelpkg/download,
-       babelpkg/config
+import babelpkg/packageinfo, babelpkg/version, babelpkg/tools,
+       babelpkg/download, babelpkg/config, babelpkg/compat
 
 when not defined(windows):
   from posix import getpid

src/babelpkg/compat.nim

@@ -0,0 +1,28 @@
+# Copyright (C) Dominik Picheta. All rights reserved.
+# BSD License. Look at license.txt for more info.
+
+## This module contains additional code from the development version of
+## Nimrod's standard library. These procs are required to be able to compile
+## against the last stable release 0.9.4. Once 0.9.6 is release these procs
+## will disappear.
+
+import json
+
+when not defined(`json.{}`):
+  proc `{}`*(node: PJsonNode, key: string): PJsonNode =
+    ## Transverses the node and gets the given value. If any of the
+    ## names does not exist, returns nil
+    result = node
+    if isNil(node): return nil
+    result = result[key]
+
+when not defined(`json.{}=`):
+  proc `{}=`*(node: PJsonNode, names: varargs[string], value: PJsonNode) =
+    ## Transverses the node and tries to set the value at the given location
+    ## to `value` If any of the names are missing, they are added
+    var node = node
+    for i in 0..(names.len-2):
+      if isNil(node[names[i]]):
+        node[names[i]] = newJObject()
+      node = node[names[i]]
+    node[names[names.len-1]] = value