AWS publish tasks

package.json

@@ -22,6 +22,7 @@
   },
   "devDependencies": {
     "async": "~0.2.9",
+    "aws-sdk": "~1.5.0",
     "benchmark": "~1.0",
     "dustjs-linkedin": "~2.0.2",
     "eco": "~1.1.0-rc-3",

tasks/publish.js

@@ -0,0 +1,69 @@
+var _ = require('underscore'),
+    async = require('async'),
+    AWS = require('aws-sdk'),
+    git = require('./util/git');
+
+module.exports = function(grunt) {
+  grunt.registerTask('publish', function() {
+    var done = this.async();
+    initSDK();
+
+    git.commitInfo(function(err, info) {
+      if (info.isMaster) {
+        publish(fileMap(['-latest', '-' + info.head]), done);
+      } else {
+        // Silently ignore for branches
+        done();
+      }
+    });
+  });
+  grunt.registerTask('publish:version', function() {
+    var done = this.async();
+    initSDK();
+
+    git.commitInfo(function(err, info) {
+      if (!info.tagName) {
+        throw new Error('The current commit must be tagged');
+      }
+      publish(fileMap(['-' + info.tagName]), done);
+    });
+  });
+
+  function initSDK() {
+    var bucket = process.env.S3_BUCKET_NAME,
+        key = process.env.S3_ACCESS_KEY_ID,
+        secret = process.env.S3_SECRET_ACCESS_KEY;
+
+    if (!bucket || !key || !secret) {
+      throw new Error('Missing S3 config values');
+    }
+
+    AWS.config.update({accessKeyId: key, secretAccessKey: secret});
+  }
+  function publish(files, callback) {
+    var s3 = new AWS.S3(),
+        bucket = process.env.S3_BUCKET_NAME;
+
+    async.forEach(_.keys(files), function(file, callback) {
+        var params = {Bucket: bucket, Key: file, Body: grunt.file.read(files[file])};
+        s3.putObject(params, function(err, data) {
+          if (err) {
+            throw err;
+          } else {
+            grunt.log.writeln('Published ' + file + ' to build server.');
+            callback();
+          }
+        });
+      },
+      callback);
+  }
+  function fileMap(suffixes) {
+    var map = {};
+    _.each(['handlebars.js', 'handlebars.min.js', 'handlebars.runtime.js', 'handlebars.runtime.min.js'], function(file) {
+      _.each(suffixes, function(suffix) {
+        map[file.replace(/\.js$/, suffix + '.js')] = 'dist/' + file;
+      });
+    });
+    return map;
+  }
+};