Create shrinkwrap from build

The npm shrinkwrap that we generate during build in order to package
with distributions is now properly created based on the built
dependencies rather than the local dev install.

tasks/build/index.js

@@ -2,7 +2,6 @@ module.exports = function (grunt) {
   let { flatten } = require('lodash');
 
   grunt.registerTask('build', flatten([
-    '_build:shrinkwrap:ensureExists:true',
     '_build:getProps',
     'clean:build',
     'clean:target',
@@ -13,9 +12,8 @@ module.exports = function (grunt) {
     '_build:installedPlugins',
     '_build:packageJson',
     '_build:readme',
-    '_build:shrinkwrap:copyToBuild',
-    '_build:shrinkwrap:cleanup',
     '_build:installNpmDeps',
+    '_build:shrinkwrap:ensureExists:true',
     'clean:testsFromModules',
     'clean:deepModuleBins',
     'clean:deepModules',

tasks/build/shrinkwrap.js

@@ -2,9 +2,10 @@ module.exports = function (grunt) {
   let { config } = grunt;
   let { statSync } = require('fs');
   let { join } = require('path');
-  let exec = (...args) => require('../utils/exec')(...args, { cwd: config.get('root') });
+  let buildDir = join(config.get('root'), 'build', 'kibana');
+  let exec = (...args) => require('../utils/exec')(...args, { cwd: buildDir });
   let newFiles = [];
-  let shrinkwrapFile = join(config.get('root'), 'npm-shrinkwrap.json');
+  let shrinkwrapFile = join(buildDir, 'npm-shrinkwrap.json');
 
   grunt.registerTask('_build:shrinkwrap:ensureExists', function (createIfMissing) {
     try {
@@ -19,23 +20,4 @@ module.exports = function (grunt) {
       else grunt.fail.warn('Releases require an npm-shrinkwrap.json file to exist');
     }
   });
-
-  grunt.registerTask('_build:shrinkwrap:copyToBuild', function () {
-    // this.requires(['_build:shrinkwrap:ensureExists', 'copy:devSource']);
-
-    // backup shrinkwrap and copy to build
-    exec('cp', ['npm-shrinkwrap.json', 'npm-shrinkwrap.dev']);
-    exec('cp', ['npm-shrinkwrap.json', join(config.get('root'), 'build', 'kibana', 'npm-shrinkwrap.build.json')]);
-
-    // create shrinkwrap without dev dependencies and copy to build
-    exec('npm', ['shrinkwrap', '--loglevel', 'error']);
-    exec('cp', ['npm-shrinkwrap.json', join(config.get('root'), 'build', 'kibana', 'npm-shrinkwrap.json')]);
-
-    // restore the dev shrinkwrap
-    exec('mv', ['npm-shrinkwrap.dev', 'npm-shrinkwrap.json']);
-  });
-
-  grunt.registerTask('_build:shrinkwrap:cleanup', function () {
-    if (newFiles.length) exec('rm', newFiles.splice(0));
-  });
 };