Support in-memory building

.gitignore

@@ -4,3 +4,4 @@ test/excluded.js
 test/sfx.js
 test/tree-build.js
 test/tree-build.js.map
+test/memory-test

index.js

@@ -103,7 +103,7 @@ exports.buildTree = function(tree, outFile, opts) {
     return Promise.resolve(compileLoad(load, opts))
     .then(outputs.push.bind(outputs));
   }))
-  .then(builder.writeOutputFile.bind(this, opts, outputs, loader.baseURL));
+  .then(builder.writeOutput.bind(this, opts, outputs, loader.baseURL));
 };
 
 exports.buildSFX = function(moduleName, outFile, opts) {
@@ -162,7 +162,7 @@ exports.buildSFX = function(moduleName, outFile, opts) {
     outputs.push("});");
   })
   .then(function() {
-    return builder.writeOutputFile(opts, outputs, loader.baseURL);
+    return builder.writeOutput(opts, outputs, loader.baseURL);
   });
 };
 

lib/builder.js

@@ -2,7 +2,8 @@ var saucy = require('./sourcemaps');
 var path = require('path');
 var mkdirp = require('mkdirp');
 var fs = require('fs');
-var asp = require('rsvp').denodeify;
+var rsvp = require('rsvp');
+var asp = rsvp.denodeify;
 var uglify = require('uglify-js');
 
 function countLines(str) {
@@ -36,7 +37,7 @@ function processOutputs(outputs) {
       if (map) {
         sourceMapsWithOffsets.push([offset + offset_, map]);
       }
-    } 
+    }
     else if (typeof output == 'string') {
       source = output;
     }
@@ -59,7 +60,7 @@ function createOutput(outputs, outFile, baseURL, createSourceMaps) {
 
   if (createSourceMaps && outputObj.sourceMapsWithOffsets.length)
     sourceMap = saucy.concatenateSourceMaps(outFile, outputObj.sourceMapsWithOffsets, baseURL);
-  
+
   var output = outputObj.sources.join('\n');
 
   return {
@@ -101,31 +102,44 @@ function minify(output, fileName, mangle) {
   return output;
 }
 
-
-exports.writeOutputFile = function(opts, outputs, baseURL) {
-  // remove 'file:' part
-  var basePath = baseURL.substr(5);
-
-  opts.outFile = path.relative(basePath, path.resolve(opts.outFile));
-
-  var output = createOutput(outputs, opts.outFile, baseURL, opts.sourceMaps);
-
-  if (opts.minify)
-    output = minify(output, opts.outFile, opts.mangle);
-
+function writeOutputFile(opts, output, basePath) {
   if (opts.sourceMaps) {
     var sourceMapFile = path.basename(opts.outFile) + '.map';
     output.source += '\n//# sourceMappingURL=' + sourceMapFile;
   }
 
   return asp(mkdirp)(path.dirname(path.resolve(basePath, opts.outFile)))
   .then(function() {
-    if (!opts.sourceMaps)
-      return;
-    return asp(fs.writeFile)(path.resolve(basePath, path.dirname(opts.outFile), sourceMapFile), output.sourceMap);
+    if (!opts.sourceMaps) return;
+    var sourceMapPath = path.resolve(basePath, path.dirname(opts.outFile), sourceMapFile);
+    return asp(fs.writeFile)(sourceMapPath, output.sourceMap);
   })
   .then(function() {
-    return asp(fs.writeFile)(path.resolve(basePath, opts.outFile), output.source);
+    var sourcePath = path.resolve(basePath, opts.outFile);
+    return asp(fs.writeFile)(sourcePath, output.source);
   });
+}
+
+exports.inlineSourceMap = function(output) {
+  return output.source +
+    '\n//# sourceMappingURL=data:application/json;base64,' +
+    new Buffer(output.sourceMap.toString()).toString('base64');
+};
+
+exports.writeOutput = function(opts, outputs, baseURL) {
+  // remove 'file:' part
+  var basePath = baseURL.substr(5);
+
+  if (opts.outFile)
+    opts.outFile = path.relative(basePath, path.resolve(opts.outFile));
+
+  var output = createOutput(outputs, opts.outFile, baseURL, opts.sourceMaps);
+
+  if (opts.minify)
+    output = minify(output, opts.outFile, opts.mangle);
 
+  if (opts.outFile)
+    return writeOutputFile(opts, output, basePath);
+  else
+    return rsvp.resolve(output);
 };

test/run-build.js

@@ -1,10 +1,23 @@
 var builder = require('../index');
+var inline = require('../lib/builder').inlineSourceMap;
+var fs = require('fs');
 
 var err = function(e) {
   setTimeout(function() {
     throw e;
   });
-}
+};
+
+console.log('Running in-memory build...');
+builder.loadConfig('./cfg.js')
+.then(function() {
+  builder.build('tree/first', null, { sourceMaps: true, minify: true })
+  .then(function(output) {
+    fs.writeFile('memory-test', inline(output));
+    console.log('Wrote in-memory build to ./memory-test');
+  })
+  .catch(err);
+});
 
 console.log('Running a multi-format build...');