diff --git a/packages/app/main/gulpfile.common.js b/packages/app/main/gulpfile.common.js
new file mode 100644
index 000000000..7ada729b7
--- /dev/null
+++ b/packages/app/main/gulpfile.common.js
@@ -0,0 +1,158 @@
+const packageJson = require('./package.json');
+const gulp = require ('gulp');
+
+const defaultElectronMirror = 'https://github.com/electron/electron/releases/download/v';
+const defaultElectronVersion = packageJson.devDependencies["electron"];
+const githubAccountName = "Microsoft";
+const githubRepoName = "BotFramework-Emulator";
+const appId = "F3C061A6-FE81-4548-82ED-C1171D9856BB";
+
+/** Copies extension json files into built */
+gulp.task('copy-extension-stubs', function () {
+  return gulp
+    .src('./src/extensions/**/*')
+    .pipe(gulp.dest('./app/extensions'));
+});
+
+/** Checks all files for missing GitHub copyright text and reports missing files */
+gulp.task('verify:copyright', function () {
+  const lernaRoot = '../../../';
+  const lernaJson = require(join(lernaRoot, 'lerna.json'));
+  const files = lernaJson.packages.filter(p => !/\/custom-/.test(p)).map(dir => join(lernaRoot, dir, '**/*.@(js|jsx|ts|tsx)'));
+  const filesWithoutCopyright = [];
+  let count = 0;
+  let scanned = 0;
+
+  return gulp
+    .src(files, { buffer: false })
+    .pipe(through2(
+      (file, _, callback) => {
+        const filename = file.history[0];
+
+        count++;
+
+        if (
+          // TODO: Instead of using pattern, we should use .gitignore
+          !/[\\\/](build|built|lib|node_modules)[\\\/]/.test(filename)
+          && !file.isDirectory()
+        ) {
+          callback(null, file);
+        } else {
+          callback();
+        }
+      }
+    ))
+    .pipe(buffer())
+    .pipe(through2(
+      (file, _, callback) => {
+        const filename = file.history[0];
+        const first1000 = file.contents.toString('utf8', 0, 1000);
+
+        if (!~first1000.indexOf('Copyright (c) Microsoft Corporation')) {
+          filesWithoutCopyright.push(relative(process.cwd(), filename));
+        }
+
+        scanned++;
+
+        callback();
+      },
+      callback => {
+        log.info(`Verified ${chalk.magenta(scanned)} out of ${chalk.magenta(count)} files with copyright header`);
+
+        if (filesWithoutCopyright.length) {
+          log.error(chalk.red('Copyright header is missing from the following files:'));
+          filesWithoutCopyright.forEach(filename => log.error(chalk.magenta(filename)));
+          callback(new Error('missing copyright header'));
+        } else {
+          callback();
+        }
+      }
+    ));
+});
+
+/** Gets an environment variable value with the provided name */
+function getEnvironmentVar(name, defaultValue = undefined) {
+  return (process.env[name] === undefined) ? defaultValue : process.env[name]
+}
+
+/** Replaces an environment variable */
+function replaceEnvironmentVar(str, name, defaultValue = undefined) {
+  const value = getEnvironmentVar(name, defaultValue);
+  if (value === undefined)
+    throw new Error(`Required environment variable missing: ${name}`);
+  return str.replace(new RegExp('\\${' + name + '}', 'g'), value);
+}
+
+/** Replaces a packaging-related environment variable */
+function replacePackageEnvironmentVars(obj) {
+  let str = JSON.stringify(obj);
+  str = replaceEnvironmentVar(str, "ELECTRON_MIRROR", defaultElectronMirror);
+  str = replaceEnvironmentVar(str, "ELECTRON_VERSION", defaultElectronVersion);
+  str = replaceEnvironmentVar(str, "appId", appId);
+  return JSON.parse(str);
+}
+
+/** Returns the Electron Mirror URL from where electron is downloaded */
+function getElectronMirrorUrl() {
+  return `${getEnvironmentVar("ELECTRON_MIRROR", defaultElectronMirror)}${getEnvironmentVar("ELECTRON_VERSION", defaultElectronVersion)}`;
+}
+
+/** Gets the config file for a specific platform */
+function getConfig(platform, target) {
+  return extend({},
+    replacePackageEnvironmentVars(require('./scripts/config/common.json')),
+    replacePackageEnvironmentVars(require(`./scripts/config/${platform}.json`)),
+    (target ? replacePackageEnvironmentVars(require(`./scripts/config/${platform}-${target}.json`)) : {})
+  );
+}
+
+/** _.extend */
+function extend(...sources) {
+  let output = {};
+  sources.forEach(source => {
+    extend1(output, source);
+  });
+  return output;
+}
+
+function extend1(destination, source) {
+  for (var property in source) {
+    if (source[property] && source[property].constructor &&
+      source[property].constructor === Object) {
+      destination[property] = destination[property] || {};
+      arguments.callee(destination[property], source[property]);
+    } else {
+      destination[property] = source[property];
+    }
+  }
+  return destination;
+};
+
+/** Hashes a file asynchronously */
+function hashFileAsync(filename, algo = 'sha512', encoding = 'base64') {
+  var builderUtil = require('builder-util');
+  return builderUtil.hashFile(filename, algo, encoding);
+}
+
+/** Sets the packaged artifact filenames */
+function getReleaseFilename() {
+  const releaseVersion = getEnvironmentVar('EMU_VERSION', packageJson.version);
+  const releasePlatform = getEnvironmentVar('EMU_PLATFORM');
+  if (!releasePlatform) {
+    throw new Error('Environment variable EMU_PLATFORM missing. Please retry with valid value.');
+  }
+  const releaseName = `${packageJson.packagename}-${releaseVersion}-${releasePlatform}`;
+
+  return releaseName;
+}
+
+module.exports = {
+  extend,
+  getConfig,
+  getEnvironmentVar,
+  getElectronMirrorUrl,
+  getReleaseFilename,
+  githubAccountName,
+  githubRepoName,
+  hashFileAsync
+};
diff --git a/packages/app/main/gulpfile.js b/packages/app/main/gulpfile.js
deleted file mode 100644
index 589863450..000000000
--- a/packages/app/main/gulpfile.js
+++ /dev/null
@@ -1,772 +0,0 @@
-//
-// Copyright (c) Microsoft. All rights reserved.
-// Licensed under the MIT license.
-//
-// Microsoft Bot Framework: http://botframework.com
-//
-// Bot Framework Emulator Github:
-// https://github.com/Microsoft/BotFramwork-Emulator
-//
-// Copyright (c) Microsoft Corporation
-// All rights reserved.
-//
-// MIT License:
-// Permission is hereby granted, free of charge, to any person obtaining
-// a copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to
-// permit persons to whom the Software is furnished to do so, subject to
-// the following conditions:
-//
-// The above copyright notice and this permission notice shall be
-// included in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-//
-
-const { join, relative } = require('path');
-const buffer = require('vinyl-buffer');
-const chalk = require('chalk');
-const gulp = require('gulp');
-const log = require('fancy-log');
-const pjson = require('./package.json');
-const shell = require('gulp-shell');
-const through2 = require('through2').obj;
-
-const defaultElectronMirror = 'https://github.com/electron/electron/releases/download/v';
-const defaultElectronVersion = pjson.devDependencies["electron"];
-const githubAccountName = "Microsoft";
-const githubRepoName = "BotFramework-Emulator";
-const appId = "F3C061A6-FE81-4548-82ED-C1171D9856BB";
-
-//============================================================================
-// BUILD
-//============================================================================
-
-//----------------------------------------------------------------------------
-gulp.task('clean', function () {
-  const clean = require('gulp-clean');
-  return gulp.src('./app/', { read: false, allowEmpty: true })
-    .pipe(clean());
-});
-
-//----------------------------------------------------------------------------
-gulp.task('copy-extension-stubs', function () {
-  return gulp
-    .src('./src/extensions/**/*')
-    .pipe(gulp.dest('./app/extensions'));
-});
-
-//============================================================================
-// GET-LICENSES
-//============================================================================
-
-//----------------------------------------------------------------------------
-gulp.task('get-licenses', function () {
-  const licenses = require('license-list');
-  const source = require('vinyl-source-stream');
-  const lerna = require('../../../lerna.json');
-  const stream = source('../../../ThirdPartyLicenses.txt');
-
-  const formatLicense = (pkgInfo) => {
-    const formatLicenseFile = () => {
-      if (typeof pkgInfo.licenseFile === 'string') {
-        return pkgInfo.licenseFile.split(/\n/).map(line => `\t${line}`).join('\n');
-      } else {
-        return '\tLICENSE file does not exist';
-      }
-    }
-    return `${pkgInfo.name}@${pkgInfo.version} (${pkgInfo.license})\n\n${formatLicenseFile()}\n\n`;
-  }
-
-  const tasks = lerna.packages.map(package => licenses(`../../../${package}`), { dev: false });
-
-  return Promise.all(tasks)
-    .then(values => {
-      const main = values[0];
-      const client = values[1];
-      const packages = {
-        ...main,
-        ...client
-      };
-      const keys = Object.keys(packages).sort().filter(key =>
-        !key.startsWith(`${pjson.name}@`) &&
-        !key.startsWith('@bfemulator'))
-      keys.forEach(pkgId => {
-        const pkgInfo = packages[pkgId];
-        stream.write(formatLicense(pkgInfo));
-      })
-      stream.end();
-      stream.pipe(gulp.dest('.'));
-    })
-    .catch(err => {
-      console.log(err)
-    });
-});
-
-//============================================================================
-// STAGE
-// Stages the application folder from which redistributables are built.
-//============================================================================
-
-//============================================================================
-// STAGE:WINDOWS
-
-//----------------------------------------------------------------------------
-gulp.task('stage:windows', function () {
-  var builder = require('electron-builder');
-  const config = getConfig("windows", "dir");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.WINDOWS.createTarget(["dir"], builder.Arch.ia32, builder.Arch.x64),
-    config
-  });
-});
-
-//============================================================================
-// STAGE:MAC
-
-//----------------------------------------------------------------------------
-gulp.task('stage:mac', function () {
-  var builder = require('electron-builder');
-  const config = getConfig("mac", "dir");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.MAC.createTarget(["dir"]),
-    config
-  });
-});
-
-//============================================================================
-// STAGE:LINUX
-
-//----------------------------------------------------------------------------
-gulp.task('stage:linux', function () {
-  var builder = require('electron-builder');
-  const config = getConfig("linux", "dir");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.LINUX.createTarget(["dir"]),
-    config
-  });
-});
-
-//============================================================================
-// REDIST
-// Builds a redistributable from the staged application folder.
-//============================================================================
-
-//----------------------------------------------------------------------------
-function hashFileAsync(filename, algo = 'sha512', encoding = 'base64') {
-  var builderUtil = require('builder-util');
-  return builderUtil.hashFile(filename, algo, encoding);
-}
-
-//----------------------------------------------------------------------------
-function writeYamlMetadataFile(releaseFilename, yamlFilename, path, fileHash, releaseDate, extra = {}) {
-  var fsp = require('fs-extra');
-  var yaml = require('js-yaml');
-
-  const ymlInfo = {
-    version: pjson.version,
-    releaseDate: releaseDate,
-    githubArtifactName: releaseFilename,
-    path: releaseFilename,
-    sha512: fileHash
-  };
-  const obj = extend({}, ymlInfo, extra);
-  const ymlStr = yaml.safeDump(obj);
-  fsp.writeFileSync(`./${path}/${yamlFilename}`, ymlStr);
-}
-
-//----------------------------------------------------------------------------
-function writeJsonMetadataFile(releaseFilename, jsonFilename, path, releaseDate) {
-  var fsp = require('fs-extra');
-
-  const jsonInfo = {
-    version: pjson.version,
-    releaseDate: releaseDate,
-    url: `https://github.com/${githubAccountName}/${githubRepoName}/releases/v${pjson.version}/${releaseFilename}`
-  };
-  fsp.outputJsonSync(`./${path}/${jsonFilename}`, jsonInfo, { spaces: 2 });
-}
-
-//============================================================================
-// REDIST:WINDOWS-NSIS
-
-//----------------------------------------------------------------------------
-gulp.task('redist:windows-nsis:binaries', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("windows", "nsis");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.WINDOWS.createTarget(["nsis"], builder.Arch.ia32),
-    config,
-    prepackaged: './dist/win-ia32-unpacked'
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          replaceWhitespace: true
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//----------------------------------------------------------------------------
-gulp.task('redist:windows-nsis:metadata-only', function () {
-  const config = getConfig("windows", "nsis");
-  const releaseFilename = config.nsis.artifactName.replace('${version}', pjson.version);
-  const sha512 = hashFileAsync(`./dist/${releaseFilename}`);
-  const sha2 = hashFileAsync(`./dist/${releaseFilename}`, 'sha256', 'hex');
-  const releaseDate = new Date().toISOString();
-
-  return Promise.all([sha512, sha2])
-    .then((values) => {
-      writeYamlMetadataFile(releaseFilename, 'latest.yml', './dist', values[0], releaseDate, { sha2: values[1] });
-    });
-});
-
-//----------------------------------------------------------------------------
-gulp.task('redist:windows-nsis:metadata',
-  gulp.series('redist:windows-nsis:binaries', 'redist:windows-nsis:metadata-only'));
-
-//----------------------------------------------------------------------------
-gulp.task('redist:windows-nsis', gulp.series('redist:windows-nsis:metadata'));
-
-//============================================================================
-// REDIST:WINDOWS-SQUIRREL
-
-//----------------------------------------------------------------------------
-gulp.task('redist:windows-squirrel', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("windows", "squirrel");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.WINDOWS.createTarget(["squirrel"], builder.Arch.x64),
-    config,
-    prepackaged: './dist/win-ia32-unpacked'
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          lowerCase: false,
-          replaceName: true,
-          replaceWhitespace: true,
-          srcName: config.productName,
-          dstName: config.squirrelWindows.name
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//============================================================================
-// REDIST:MAC
-
-//----------------------------------------------------------------------------
-gulp.task('redist:mac:binaries', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("mac");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.MAC.createTarget(["zip", "dmg"]),
-    config,
-    prepackaged: './dist/mac'
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          replaceWhitespace: true,
-          fixMacBinaryNames: true
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//----------------------------------------------------------------------------
-gulp.task('redist:mac:metadata-only', function () {
-  const releaseFilename = `${pjson.packagename}-${pjson.version}-mac.zip`;
-  const releaseHash = hashFileAsync(`./dist/${releaseFilename}`);
-  const releaseDate = new Date().toISOString();
-
-  writeJsonMetadataFile(releaseFilename, 'latest-mac.json', './dist', releaseDate);
-  return releaseHash.then((hashValue) => {
-    writeYamlMetadataFile(releaseFilename, 'latest-mac.yml', './dist', hashValue, releaseDate);
-  });
-});
-
-//----------------------------------------------------------------------------
-gulp.task('redist:mac:metadata',
-  gulp.series('redist:mac:binaries', 'redist:mac:metadata-only'));
-
-//----------------------------------------------------------------------------
-gulp.task('redist:mac', gulp.series('redist:mac:metadata'));
-
-//============================================================================
-// REDIST:LINUX
-
-//----------------------------------------------------------------------------
-gulp.task('redist:linux', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("linux");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.LINUX.createTarget(["deb", "AppImage"], builder.Arch.ia32, builder.Arch.x64),
-    config,
-    prepackaged: './dist/linux-unpacked'
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          replaceWhitespace: true
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//============================================================================
-// PACKAGE
-// Stages and builds redist in a single step.
-//============================================================================
-
-//============================================================================
-// PACKAGE:WINDOWS-NSIS
-
-//----------------------------------------------------------------------------
-gulp.task('package:windows-nsis:binaries', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("windows", "nsis");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.WINDOWS.createTarget(["nsis"], builder.Arch.ia32, builder.Arch.x64),
-    config
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          replaceWhitespace: true
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//----------------------------------------------------------------------------
-gulp.task('package:windows-nsis:metadata', gulp.series('package:windows-nsis:binaries', function () {
-  const config = getConfig("windows", "nsis");
-  const releaseFilename = `${config.productName}-Setup-${pjson.version}.exe`;
-  const sha512 = hashFileAsync(`./dist/${releaseFilename}`);
-  const sha2 = hashFileAsync(`./dist/${releaseFilename}`, 'sha256', 'hex');
-  const releaseDate = new Date().toISOString();
-
-  return Promise.all([sha512, sha2])
-    .then((values) => {
-      writeYamlMetadataFile(releaseFilename, 'latest.yml', './dist', values[0], releaseDate, { sha2: values[1] });
-    });
-}));
-
-//----------------------------------------------------------------------------
-gulp.task('package:windows-nsis', gulp.series('package:windows-nsis:metadata'));
-
-//============================================================================
-// PACKAGE:WINDOWS-SQUIRREL
-
-//----------------------------------------------------------------------------
-gulp.task('package:windows-squirrel', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("windows", "squirrel");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.WINDOWS.createTarget(["squirrel"], builder.Arch.x64),
-    config
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          lowerCase: false,
-          replaceName: true,
-          replaceWhitespace: true,
-          srcName: config.productName,
-          dstName: config.squirrelWindows.name
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//============================================================================
-// PACKAGE:MAC
-
-//----------------------------------------------------------------------------
-gulp.task('package:mac:binaries', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("mac");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.MAC.createTarget(["zip"]),
-    config
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          replaceWhitespace: true
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-//----------------------------------------------------------------------------
-gulp.task('package:mac:metadata', gulp.series('package:mac:binaries', function () {
-  const config = getConfig("mac");
-  const releaseFilename = `${config.productName}-${pjson.version}-mac.zip`;
-  const releaseHash = hashFileAsync(`./dist/${releaseFilename}`);
-  const releaseDate = new Date().toISOString();
-
-  writeJsonMetadataFile(releaseFilename, 'latest-mac.json', './dist', releaseDate);
-  return releaseHash.then((hashValue) => {
-    writeYamlMetadataFile(releaseFilename, 'latest-mac.yml', './dist', hashValue, releaseDate);
-  });
-}));
-
-//----------------------------------------------------------------------------
-gulp.task('package:mac', gulp.series('package:mac:metadata'));
-
-//============================================================================
-// PACKAGE:LINUX
-
-//----------------------------------------------------------------------------
-gulp.task('package:linux', function () {
-  var rename = require('gulp-rename');
-  var builder = require('electron-builder');
-  const config = getConfig("linux");
-  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
-  return builder.build({
-    targets: builder.Platform.LINUX.createTarget(["deb", "AppImage"], builder.Arch.ia32, builder.Arch.x64),
-    config
-  }).then((filenames) => {
-    return gulp.src(filenames, { allowEmpty: true })
-      .pipe(rename(function (path) {
-        path.basename = setReleaseFilename(path.basename, {
-          replaceWhitespace: true
-        });
-      }))
-      .pipe(gulp.dest('./dist'));
-  }).then(() => {
-    // Wait for the files to be written to disk and closed.
-    return delay(10000);
-  });
-});
-
-
-//============================================================================
-// PUBLISH
-//============================================================================
-
-//----------------------------------------------------------------------------
-function publishFiles(filelist) {
-  var CancellationToken = require('electron-builder-http/out/CancellationToken').CancellationToken;
-  var GitHubPublisher = require('electron-publish/out/gitHubPublisher').GitHubPublisher;
-  var publishConfig = replacePublishEnvironmentVars(require('./scripts/config/publish.json'));
-
-  const context = {
-    cancellationToken: new CancellationToken(),
-    progress: null
-  };
-  const publisher = new GitHubPublisher(
-    context,
-    publishConfig,
-    pjson.version, {
-      publish: "always",
-      draft: true,
-      prerelease: false
-    });
-  const errorlist = [];
-
-  const uploads = filelist.map(file => {
-    return publisher.upload({ file })
-      .catch((err) => {
-        errorlist.push(err.response ? `Failed to upload ${file}, http status code ${err.response.statusCode}` : err);
-        return Promise.resolve();
-      });
-  });
-
-  return Promise.all(uploads)
-    .then(() => errorlist.forEach((err) => console.error(err)));
-}
-
-//----------------------------------------------------------------------------
-gulp.task('publish:windows-nsis', function () {
-  const filelist = getFileList("windows", "nsis");
-  return publishFiles(filelist);
-});
-
-//----------------------------------------------------------------------------
-gulp.task('publish:windows-squirrel', function () {
-  const basename = require('./scripts/config/windows-squirrel.json').squirrelWindows.name;
-  const filelist = getFileList("windows", "squirrel", {
-    basename,
-  });
-  return publishFiles(filelist);
-});
-
-//----------------------------------------------------------------------------
-gulp.task('publish:mac', function () {
-  const filelist = getFileList("mac");
-  return publishFiles(filelist);
-});
-
-//----------------------------------------------------------------------------
-gulp.task('publish:linux', function () {
-  const filelist = getFileList("linux");
-  return publishFiles(filelist);
-});
-
-
-//============================================================================
-// VERIFY:COPYRIGHT
-
-//----------------------------------------------------------------------------
-gulp.task('verify:copyright', function () {
-  const lernaRoot = '../../../';
-  const lernaJson = require(join(lernaRoot, 'lerna.json'));
-  const files = lernaJson.packages.filter(p => !/\/custom-/.test(p)).map(dir => join(lernaRoot, dir, '**/*.@(js|jsx|ts|tsx)'));
-  const filesWithoutCopyright = [];
-  let count = 0;
-  let scanned = 0;
-
-  return gulp
-    .src(files, { buffer: false })
-    .pipe(through2(
-      (file, _, callback) => {
-        const filename = file.history[0];
-
-        count++;
-
-        if (
-          // TODO: Instead of using pattern, we should use .gitignore
-          !/[\\\/](build|built|lib|node_modules)[\\\/]/.test(filename)
-          && !file.isDirectory()
-        ) {
-          callback(null, file);
-        } else {
-          callback();
-        }
-      }
-    ))
-    .pipe(buffer())
-    .pipe(through2(
-      (file, _, callback) => {
-        const filename = file.history[0];
-        const first1000 = file.contents.toString('utf8', 0, 1000);
-
-        if (!~first1000.indexOf('Copyright (c) Microsoft Corporation')) {
-          filesWithoutCopyright.push(relative(process.cwd(), filename));
-        }
-
-        scanned++;
-
-        callback();
-      },
-      callback => {
-        log.info(`Verified ${chalk.magenta(scanned)} out of ${chalk.magenta(count)} files with copyright header`);
-
-        if (filesWithoutCopyright.length) {
-          log.error(chalk.red('Copyright header is missing from the following files:'));
-          filesWithoutCopyright.forEach(filename => log.error(chalk.magenta(filename)));
-          callback(new Error('missing copyright header'));
-        } else {
-          callback();
-        }
-      }
-    ));
-});
-
-//============================================================================
-// UTILS
-//============================================================================
-
-//----------------------------------------------------------------------------
-function getConfig(platform, target) {
-  return extend({},
-    replacePackageEnvironmentVars(require('./scripts/config/common.json')),
-    replacePackageEnvironmentVars(require(`./scripts/config/${platform}.json`)),
-    (target ? replacePackageEnvironmentVars(require(`./scripts/config/${platform}-${target}.json`)) : {})
-  );
-}
-
-//----------------------------------------------------------------------------
-function getFileList(platform, target, options = {}) {
-  options = extend({}, {
-    basename: pjson.packagename,
-    version: pjson.version,
-  }, options);
-  const path = './dist';
-  const filelist = [];
-  switch (`${platform}-${target || ''}`) {
-    case "windows-nsis":
-      filelist.push(`${path}/latest.yml`);
-      filelist.push(`${path}/${options.basename}-setup-${options.version}.exe`);
-      //filelist.push(`${path}/${options.basename}-${options.version}-win.zip`);
-      //filelist.push(`${path}/${options.basename}-${options.version}-ia32-win.zip`);
-      break;
-
-    case "windows-squirrel":
-      filelist.push(`${path}/RELEASES`);
-      //filelist.push(`${options.path}${options.basename}-Setup-${options.version}.exe`);
-      filelist.push(`${path}/${options.basename}-${options.version}-full.nupkg`);
-      break;
-
-    case "mac-":
-      filelist.push(`${path}/latest-mac.yml`);
-      filelist.push(`${path}/latest-mac.json`);
-      filelist.push(`${path}/${options.basename}-${options.version}-mac.zip`);
-      filelist.push(`${path}/${options.basename}-${options.version}.dmg`);
-      break;
-
-    case "linux-":
-      filelist.push(`${path}/${options.basename}-${options.version}-i386.AppImage`);
-      filelist.push(`${path}/${options.basename}-${options.version}-x86_64.AppImage`);
-      filelist.push(`${path}/${options.basename}_${options.version}_i386.deb`);
-      filelist.push(`${path}/${options.basename}_${options.version}_amd64.deb`);
-      break;
-  }
-  return filelist;
-}
-
-//----------------------------------------------------------------------------
-function setReleaseFilename(filename, options = {}) {
-  options = extend({}, {
-    lowerCase: true,
-    replaceWhitespace: true,
-    fixBasename: true,
-    replaceName: false,
-    srcName: null,
-    dstName: null,
-    fixMacBinaryNames: false
-  },
-    options);
-  if (options.replaceName && options.srcName && options.dstName) {
-    filename = filename.replace(options.srcName, options.dstName);
-  }
-  if (options.lowerCase) {
-    filename = filename.toLowerCase();
-  }
-  if (options.replaceWhitespace) {
-    filename = filename.replace(/\s/g, '-');
-  }
-  if (options.fixBasename) {
-    // renames build artifacts like 'bot-framework_{version}.*' or 'main_{version}.*'
-    // to '{package name in package.json}_{version}.*'
-    filename = filename.replace(/(bot[-|\s]framework)?(main)?/, pjson.packagename);
-  }
-  if (options.fixMacBinaryNames) {
-    // "Bot Framework Emulator-{version}.*" is being renamed to "Botframework-Emulator-emulator-{version}.*"
-    // This resolves that issue
-    filename = filename.replace(/Botframework-Emulator-emulator/, pjson.packagename);
-  }
-  return filename;
-}
-
-//----------------------------------------------------------------------------
-function getEnvironmentVar(name, defaultValue = undefined) {
-  return (process.env[name] === undefined) ? defaultValue : process.env[name]
-}
-
-//----------------------------------------------------------------------------
-function replaceEnvironmentVar(str, name, defaultValue = undefined) {
-  let value = getEnvironmentVar(name, defaultValue);
-  if (value === undefined)
-    throw new Error(`Required environment variable missing: ${name}`);
-  return str.replace(new RegExp('\\${' + name + '}', 'g'), value);
-}
-
-//----------------------------------------------------------------------------
-function replacePackageEnvironmentVars(obj) {
-  let str = JSON.stringify(obj);
-  str = replaceEnvironmentVar(str, "ELECTRON_MIRROR", defaultElectronMirror);
-  str = replaceEnvironmentVar(str, "ELECTRON_VERSION", defaultElectronVersion);
-  str = replaceEnvironmentVar(str, "appId", appId);
-  return JSON.parse(str);
-}
-
-//----------------------------------------------------------------------------
-function replacePublishEnvironmentVars(obj) {
-  let str = JSON.stringify(obj);
-  str = replaceEnvironmentVar(str, "GH_TOKEN");
-  str = replaceEnvironmentVar(str, "githubAccountName", githubAccountName);
-  str = replaceEnvironmentVar(str, "githubRepoName", githubRepoName);
-  return JSON.parse(str);
-}
-
-//----------------------------------------------------------------------------
-function getElectronMirrorUrl() {
-  return `${getEnvironmentVar("ELECTRON_MIRROR", defaultElectronMirror)}${getEnvironmentVar("ELECTRON_VERSION", defaultElectronVersion)}`;
-}
-
-//----------------------------------------------------------------------------
-function delay(ms, result) {
-  return new Promise((resolve, reject) => setTimeout(resolve, ms, result));
-}
-
-//----------------------------------------------------------------------------
-function extend1(destination, source) {
-  for (var property in source) {
-    if (source[property] && source[property].constructor &&
-      source[property].constructor === Object) {
-      destination[property] = destination[property] || {};
-      arguments.callee(destination[property], source[property]);
-    } else {
-      destination[property] = source[property];
-    }
-  }
-  return destination;
-};
-
-//----------------------------------------------------------------------------
-function extend(...sources) {
-  let output = {};
-  sources.forEach(source => {
-    extend1(output, source);
-  });
-  return output;
-}
diff --git a/packages/app/main/gulpfile.linux.js b/packages/app/main/gulpfile.linux.js
new file mode 100644
index 000000000..f1e4af8b4
--- /dev/null
+++ b/packages/app/main/gulpfile.linux.js
@@ -0,0 +1,31 @@
+const gulp = require('gulp');
+const common = require('./gulpfile.common.js');
+
+/** Package the emulator using electron-builder
+ *  and output artifacts to /dist/
+ */
+gulp.task('package', async () => {
+  const { getElectronMirrorUrl, getConfig, getReleaseFilename } = common;
+  const rename = require('gulp-rename');
+  const builder = require('electron-builder');
+  const config = getConfig('linux');
+
+  console.log(`Electron mirror: ${getElectronMirrorUrl(getReleaseFilename)}`);
+
+  // create build artifacts
+  const filenames = await builder.build({
+    targets: builder.Platform.LINUX.createTarget(['deb', 'AppImage'], builder.Arch.ia32, builder.Arch.x64),
+    config
+  });
+
+  // rename and move the files to the /dist/ directory
+  await new Promise(resolve => {
+    gulp
+      .src(filenames, { allowEmpty: true })
+      .pipe(rename(path => {
+        path.basename = getReleaseFilename();
+      }))
+      .pipe(gulp.dest('./dist'))
+      .on('end', resolve);
+  });
+});
diff --git a/packages/app/main/gulpfile.mac.js b/packages/app/main/gulpfile.mac.js
new file mode 100644
index 000000000..fbc5fd21f
--- /dev/null
+++ b/packages/app/main/gulpfile.mac.js
@@ -0,0 +1,88 @@
+const gulp = require('gulp');
+const common = require('./gulpfile.common.js');
+const packageJson = require('./package.json');
+
+/** Package the emulator using electron-builder */
+gulp.task('stage', async () => {
+  const { getElectronMirrorUrl, getConfig } = common;
+  const builder = require('electron-builder');
+  const config = getConfig('mac', 'dir');
+
+  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
+
+  // create build artifacts
+  await builder.build({
+    targets: builder.Platform.MAC.createTarget(['dir']),
+    config
+  });
+});
+
+/** Creates the emulator installers */
+gulp.task('redist:binaries', async () => {
+  const { getElectronMirrorUrl, getConfig, getReleaseFilename } = common;
+  const rename = require('gulp-rename');
+  const builder = require('electron-builder');
+  const config = getConfig('mac');
+
+  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
+
+  // create installers
+  const filenames = await builder.build({
+    targets: builder.Platform.MAC.createTarget(['zip', 'dmg']),
+    config,
+    prepackaged: './dist/mac'
+  });
+
+  // rename and move the files to the /dist/ directory
+  await new Promise(resolve => {
+    gulp
+      .src(filenames, { allowEmpty: true })
+      .pipe(rename(path => {
+        path.basename = getReleaseFilename();
+      }))
+      .pipe(gulp.dest('./dist'))
+      .on('end', resolve);
+  });
+});
+
+/** Creates the .yml and .json metadata files */
+gulp.task('redist:metadata-only', async () => {
+  const { hashFileAsync, getReleaseFilename } = common;
+  const releaseFilename = `${getReleaseFilename()}.zip`;
+  const releaseHash = await hashFileAsync(`./dist/${releaseFilename}`);
+  const releaseDate = new Date().toISOString();
+
+  writeJsonMetadataFile(releaseFilename, 'latest-mac.json', './dist', releaseDate);
+  writeYamlMetadataFile(releaseFilename, 'latest-mac.yml', './dist', releaseHash, releaseDate);
+});
+
+/** Writes the .yml metadata file */
+function writeYamlMetadataFile(releaseFilename, yamlFilename, path, fileHash, releaseDate, extra = {}) {
+  const { extend } = common;
+  const fsp = require('fs-extra');
+  const yaml = require('js-yaml');
+
+  const ymlInfo = {
+    version: packageJson.version,
+    releaseDate,
+    githubArtifactName: releaseFilename,
+    path: releaseFilename,
+    sha512: fileHash
+  };
+  const obj = extend({}, ymlInfo, extra);
+  const ymlStr = yaml.safeDump(obj);
+  fsp.writeFileSync(`./${path}/${yamlFilename}`, ymlStr);
+}
+
+/** Writes the .json metadata file */
+function writeJsonMetadataFile(releaseFilename, jsonFilename, path, releaseDate) {
+  const fsp = require('fs-extra');
+  const { githubAccountName, githubRepoName } = common;
+
+  const jsonInfo = {
+    version: packageJson.version,
+    releaseDate,
+    url: `https://github.com/${githubAccountName}/${githubRepoName}/releases/v${packageJson.version}/${releaseFilename}`
+  };
+  fsp.outputJsonSync(`./${path}/${jsonFilename}`, jsonInfo, { spaces: 2 });
+}
diff --git a/packages/app/main/gulpfile.windows.js b/packages/app/main/gulpfile.windows.js
new file mode 100644
index 000000000..e52a8f63d
--- /dev/null
+++ b/packages/app/main/gulpfile.windows.js
@@ -0,0 +1,88 @@
+const common = require('./gulpfile.common.js');
+const gulp = require('gulp');
+const packageJson = require('./package.json');
+
+/** Package the emulator using electron-builder */
+gulp.task('stage', async () => {
+  const { getConfig, getElectronMirrorUrl } = common;
+  const builder = require('electron-builder');
+  const config = getConfig('windows', 'dir');
+
+  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
+
+  // create build artifacts
+  await builder.build({
+    targets: builder.Platform.WINDOWS.createTarget(['dir'], builder.Arch.ia32, builder.Arch.x64),
+    config
+  });
+});
+
+/** Creates the emulator installers */
+gulp.task('redist:binaries', async () => {
+  const { getConfig, getElectronMirrorUrl, getReleaseFilename } = common;
+  var rename = require('gulp-rename');
+  var builder = require('electron-builder');
+  const config = getConfig("windows", "nsis");
+
+  console.log(`Electron mirror: ${getElectronMirrorUrl()}`);
+
+  // create installers
+  const filenames = await builder.build({
+    targets: builder.Platform.WINDOWS.createTarget(["nsis"], builder.Arch.ia32),
+    config,
+    prepackaged: './dist/win-ia32-unpacked'
+  });
+
+  // rename and move the files to the /dist/ directory
+  await new Promise(resolve => {
+    gulp
+      .src(filenames, { allowEmpty: true })
+      .pipe(rename(path => {
+        path.basename = getReleaseFilename();
+      }))
+      .pipe(gulp.dest('./dist'))
+      .on('end', resolve);
+  });
+});
+
+/** Writes the build metadata to latest.yml  */
+gulp.task('redist:metadata-only', async () => {
+  const { getConfig, hashFileAsync } = common;
+  const config = getConfig('windows', 'nsis');
+  const releaseFilename = config.nsis.artifactName.replace('${version}', packageJson.version);
+  const sha512 = await hashFileAsync(`./dist/${releaseFilename}`);
+  const sha2 = await hashFileAsync(`./dist/${releaseFilename}`, 'sha256', 'hex');
+  const releaseDate = new Date().toISOString();
+
+  writeYamlMetadataFile(
+    releaseFilename,
+    'latest.yml',
+    './dist',
+    sha512,
+    releaseDate,
+    { sha2 }
+  );
+});
+
+/** Creates the emulator installers and the metadata .yml file */
+gulp.task('redist',
+  gulp.series('redist:binaries', 'redist:metadata-only')
+);
+
+/** Writes the .yml metadata file */
+function writeYamlMetadataFile(releaseFilename, yamlFilename, path, fileHash, releaseDate, extra = {}) {
+  const { extend } = common;
+  var fsp = require('fs-extra');
+  var yaml = require('js-yaml');
+
+  const ymlInfo = {
+    version: packageJson.version,
+    releaseDate,
+    githubArtifactName: releaseFilename,
+    path: releaseFilename,
+    sha512: fileHash
+  };
+  const obj = extend({}, ymlInfo, extra);
+  const ymlStr = yaml.safeDump(obj);
+  fsp.writeFileSync(`./${path}/${yamlFilename}`, ymlStr);
+}
diff --git a/packages/app/main/package.json b/packages/app/main/package.json
index 4aef76ed5..572eecb62 100644
--- a/packages/app/main/package.json
+++ b/packages/app/main/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bfemulator/main",
-  "packagename": "Botframework-Emulator",
+  "packagename": "BotFramework-Emulator",
   "version": "4.0.0-preview",
   "private": true,
   "description": "Development tool for the Microsoft Bot Framework. Allows developers to test and debug bots on localhost.",
@@ -8,14 +8,14 @@
   "homepage": "https://github.com/Microsoft/BotFramework-Emulator",
   "scripts": {
     "build": "run-s lint build:electron",
-    "build:electron": "babel ./src --out-dir app/server --extensions \".ts,.tsx\" --ignore \"**/*.spec.ts\" && gulp copy-extension-stubs",
+    "build:electron": "babel ./src --out-dir app/server --extensions \".ts,.tsx\" --ignore \"**/*.spec.ts\" && gulp --gulpfile gulpfile.common.js copy-extension-stubs",
     "lint": "tslint --project tsconfig.json",
     "start": "concurrently --kill-others --names \"electron,react-app\" --success first \"npm run start:electron:dev\" \"npm run start:react-app\"",
     "start:electron": "./node_modules/.bin/electron --inspect=7777 .",
     "start:electron:dev": "cross-env ELECTRON_TARGET_URL=http://localhost:3000/ npm run start:electron",
     "start:react-app": "cd ../client && npm start",
     "test": "jest",
-    "verify": "gulp verify:copyright"
+    "verify": "gulp --gulpfile gulpfile.common.js verify:copyright"
   },
   "keywords": [
     "microsoft",
diff --git a/packages/app/main/scripts/config/publish.json b/packages/app/main/scripts/config/publish.json
deleted file mode 100644
index 614028901..000000000
--- a/packages/app/main/scripts/config/publish.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "provider": "github",
-  "owner": "${githubAccountName}",
-  "repo": "${githubRepoName}",
-  "token": "${GH_TOKEN}"
-}
\ No newline at end of file
diff --git a/packages/app/main/scripts/config/windows-nsis.json b/packages/app/main/scripts/config/windows-nsis.json
index f7d195c87..2a4525046 100644
--- a/packages/app/main/scripts/config/windows-nsis.json
+++ b/packages/app/main/scripts/config/windows-nsis.json
@@ -5,7 +5,7 @@
     "perMachine": true,
     "allowElevation": true,
     "packElevateHelper": true,
-    "artifactName": "botframework-emulator-setup-${version}.exe",
+    "artifactName": "BotFramework-Emulator-${version}-windows-setup.exe",
     "unicode": true,
     "runAfterFinish": true,
     "installerIcon": "./scripts/config/resources/icon.ico",