Merge pull request #58 from d11e9/legacyNpm

README.md

@@ -29,3 +29,15 @@ 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.useVersion` method is available. This returns a new solc object using the version provided. **Note**: version strings must match the version substring of the files availble in `/bin/soljson-*.js`. See below for an example.
+
+	var solc = require('solc');
+	// by default the latest version is used
+	// ie: solc.useVersion('latest')
+
+	// getting a legacy version
+	var solcV011 = solc.useVersion( 'v0.1.1-2015-08-04-6ff4cd6' );
+	var output = solcV011.compile( "contract t { function g() {} }", 1 );

index.js

+function setupMethods (soljson){
 
-var soljson = require('./bin/soljson-latest.js');
-
-var compileJSON = soljson.cwrap("compileJSON", "string", ["string", "number"]);
-var compileJSONMulti =
+	var compileJSON = soljson.cwrap("compileJSON", "string", ["string", "number"]);
+	var compileJSONMulti =
 		'_compileJSONMulti' in soljson ?
 		soljson.cwrap("compileJSONMulti", "string", ["string", "number"]) :
 		null;
 
-var compile = function(input, optimise) {
+	var compile = function(input, optimise) {
 		var result = '';
 		if (typeof(input) != typeof('') && compileJSONMulti !== null)
 			result = compileJSONMulti(JSON.stringify(input), optimise);
 		else
 			result = compileJSON(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') );

package.json

 {
   "name": "solc",
-  "version": "0.1.6",
+  "version": "0.1.6-2",
   "description": "Solidity compiler",
   "main": "index.js",
   "scripts": {