allow using legacy versions via npm

README.md

@@ -29,3 +29,12 @@ Starting from version 0.1.6, multiple files are supported with automatic import
 		console.log(contractName + ': ' + output.contracts[contractName].bytecode);
 
 Note that all input files that are imported have to be supplied, the compiler will not load any additional files on its own.
+
+###Using a legacy version
+
+In order to allow compiling contracts using a specific version of solidity, the `solc.setVersion` method is available.
+
+	var solc = require('solc');
+	solc.setVersion( 'latest' ); // this is used by default
+	solc.setVersion( 'v0.1.1-2015-08-04-6ff4cd6' );
+	var output = solc.compile( "contract t { function g() {} }", 1 );

index.js

@@ -1,5 +1,5 @@
 
-var soljson = require('./bin/soljson-latest.js');
+function setupMethods (soljson){
 
 	var compileJSON = soljson.cwrap("compileJSON", "string", ["string", "number"]);
 	var compileJSONMulti =
@@ -16,8 +16,15 @@ var compile = function(input, optimise) {
 		return JSON.parse(result);
 	}
 
+	var version = soljson.cwrap("version", "string", []);
 
-module.exports = {
+	return {
+		version: version,
 		compile: compile,
-	version: soljson.cwrap("version", "string", [])
+		useVersion: function( versionString ){
+			return setupMethods( require('./bin/soljson-' + versionString + '.js' ) );
 		}
+	}
+}
+
+module.exports = setupMethods( require('./bin/soljson-latest.js') );