Split out compiler to separate syndicatec command

js/bin/syndicatec

@@ -0,0 +1,23 @@
+#!/usr/bin/env node
+// -*- javascript -*-
+
+var fs = require('fs');
+var compiler = require('../compiler/compiler.js');
+
+function compileAndPrint(inputSource) {
+  var translatedSource = compiler.compileSyndicateSource(inputSource);
+  if (translatedSource) {
+    console.log(translatedSource);
+  }
+}
+
+if (process.argv.length < 3 || process.argv[2] === '-') {
+  var inputSource = '';
+  process.stdin.resume();
+  process.stdin.setEncoding('utf8');
+  process.stdin.on('data', function(buf) { inputSource += buf; });
+  process.stdin.on('end', function() { compileAndPrint(inputSource); });
+} else {
+  var inputSource = fs.readFileSync(process.argv[2]).toString();
+  compileAndPrint(inputSource);
+}

js/compiler/README.md

@@ -0,0 +1,4 @@
+# Syndicate/js compiler
+
+Translates ES5 + Syndicate extensions to plain ES5 using
+[Ohm](https://github.com/cdglabs/ohm#readme).

js/compiler/compiler.js

@@ -316,27 +316,22 @@ semantics.addOperation('pushBindings(accumulator)', {
   }
 })
 
-function compileExtendedSource(inputSource) {
+function compileSyndicateSource(inputSource, onError) {
   var parseResult = grammar.match(inputSource);
-  if (parseResult.failed()) console.error(parseResult.message);
-  return parseResult.succeeded() && semantics(parseResult).asES5;
-}
-
-function compileAndPrint(inputSource) {
-  var translatedSource = compileExtendedSource(inputSource);
-  if (translatedSource) {
-    console.log('"use strict";');
-    console.log(translatedSource);
+  if (parseResult.failed()) {
+    if (onError) {
+      return onError(parseResult.message, parseResult);
+    } else {
+      console.error(parseResult.message);
+      return false;
+    }
+  } else {
+    return '"use strict";\n' + semantics(parseResult).asES5;
   }
 }
 
-if (process.argv.length < 3 || process.argv[2] === '-') {
-  var inputSource = '';
-  process.stdin.resume();
-  process.stdin.setEncoding('utf8');
-  process.stdin.on('data', function(buf) { inputSource += buf; });
-  process.stdin.on('end', function() { compileAndPrint(inputSource); });
-} else {
-  var inputSource = fs.readFileSync(process.argv[2]).toString();
-  compileAndPrint(inputSource);
-}
+//---------------------------------------------------------------------------
+
+module.exports.grammar = grammar;
+module.exports.semantics = semantics;
+module.exports.compileSyndicateSource = compileSyndicateSource;

js/compiler/syndicate.ohm

@@ -1,3 +1,4 @@
+// -*- javascript -*-
 // Syntactic extensions to ES5 for Syndicate/js. See compiler.js for
 // the rest of the translator.
 

js/package.json

@@ -8,11 +8,15 @@
     "type": "git",
     "url": "git://github.com/tonyg/syndicate"
   },
+  "directories": {
+    "bin": "./bin"
+  },
   "scripts": {
     "clean": "rm -f dist/*",
     "build-debug": "browserify src/main.js -d -s Syndicate -o dist/syndicate.js",
     "build-min": "browserify src/main.js -s Syndicate -o dist/_syndicate.js && uglifyjs dist/_syndicate.js -o dist/syndicate.min.js && rm dist/_syndicate.js",
-    "build": "npm run build-debug && npm run build-min",
+    "build-compiler": "browserify compiler/compiler.js -s SyndicateCompiler -o dist/_syndicatecompiler.js && uglifyjs dist/_syndicatecompiler.js -o dist/syndicatecompiler.min.js && rm dist/_syndicatecompiler.js",
+    "build": "npm run build-debug && npm run build-min && npm run build-compiler",
     "watch": "watchify src/main.js -d -s Syndicate -o dist/syndicate.js",
     "test": "mocha",
     "prepublish": "npm run build"