Build v3.3.1

[github/fretlink/purs-loader.git] / lib / bundle.js

diff --git a/lib/bundle.js b/lib/bundle.js
new file mode 100644 (file)
index 0000000..943e08b
--- /dev/null
+++ b/lib/bundle.js
@@ -0,0 +1,63 @@
+'use strict';
+
+var path = require('path');
+
+var Promise = require('bluebird');
+
+var fs = Promise.promisifyAll(require('fs'));
+
+var spawn = require('cross-spawn');
+
+var debug = require('debug')('purs-loader');
+
+var dargs = require('./dargs');
+
+module.exports = function bundle(options, bundleModules) {
+  var stdout = [];
+
+  var stderr = [];
+
+  var bundleCommand = options.pscBundle || 'purs';
+
+  var bundleArgs = (options.pscBundle ? [] : ['bundle']).concat(dargs(Object.assign({
+    _: [path.join(options.output, '*', '*.js')],
+    output: options.bundleOutput,
+    namespace: options.bundleNamespace
+  }, options.pscBundleArgs)));
+
+  bundleModules.forEach(function (name) {
+    return bundleArgs.push('--module', name);
+  });
+
+  debug('bundle: %s %O', bundleCommand, bundleArgs);
+
+  return new Promise(function (resolve, reject) {
+    debug('bundling PureScript...');
+
+    var compilation = spawn(bundleCommand, bundleArgs);
+
+    compilation.stdout.on('data', function (data) {
+      return stdout.push(data.toString());
+    });
+
+    compilation.stderr.on('data', function (data) {
+      return stderr.push(data.toString());
+    });
+
+    compilation.on('close', function (code) {
+      debug('finished bundling PureScript.');
+
+      if (code !== 0) {
+        var errorMessage = stderr.join('');
+
+        if (errorMessage.length) {
+          psModule.emitError(errorMessage);
+        }
+
+        reject(new Error('bundling failed'));
+      } else {
+        resolve(fs.appendFileAsync(options.bundleOutput, 'module.exports = ' + options.bundleNamespace));
+      }
+    });
+  });
+};
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