// Copyright 2016, Google, Inc.

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

'use strict';

var execSync = require('child_process').execSync;

exports.run = function (cmd, cwd) {

return execSync(cmd, { cwd: cwd }).toString().trim();

};

exports.pick = function (obj, field) {

if (Array.isArray(field)) {

var _obj = {};

field.forEach(function (_field) {

_obj[_field] = obj[_field];

});

return _obj;

}

return obj[field];

};

exports.prettyPick = function (obj, field) {

if (Array.isArray(field)) {

return JSON.stringify(exports.pick(obj, field));

}

return exports.pick(obj, field);

};

exports.makeHandler = function (print, field) {

return function (err, result) {

if (err) {

console.log(err);

throw err;

}

if (print === false) {

return;

}

if (Array.isArray(result) && field) {

var mapped = result.map(function (_result) {

return exports.prettyPick(_result, field);

});

console.log(mapped.join('\n'));

} else if (field) {

console.log(exports.prettyPick(result, field));

} else {

console.log(result);

}

};

};

exports.noop = (err) => {

if (err) {

throw err;

}

};