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'use strict';

var AWS = require('aws-sdk');

var codebuild = new AWS.CodeBuild();

var GitHubApi = require("github");

var github = new GitHubApi();

// setup github client

github.authenticate({

type: "basic",

username: process.env.GITHUB_USERNAME,

password: process.env.GITHUB_ACCESS_TOKEN

});

// get the region where this lambda is running

var region = process.env.AWS_DEFAULT_REGION;

// this function will be triggered by the github webhook

module.exports.start_build = (event, context, callback) => {

var response;

// we only act on pull_request changes (can be any, but we don't need those)

if('pull_request' in event) {

var head = event.pull_request.head;

var repo = head.repo;

var params = {

projectName: process.env.BUILD_PROJECT,

sourceVersion: head.sha

};

// start the codebuild process for this project

codebuild.startBuild(params, function(err, data) {

if (err) {

console.log(err, err.stack);

callback(err);

} else {

var build = data.build;

// all is well, mark the commit as being 'in progress'

github.repos.createStatus({

owner: repo.owner.login,

repo: repo.name,

sha: head.sha,

state: 'pending',

target_url: 'https://' + region + '.console.aws.amazon.com/codebuild/home?region=' + region + '#/builds/' + data.build.id + '/view/new',

context: 'CodeBuild',

description: 'Build is running...'

}).then(function(data){

console.log(data);

});

callback(null, build);

}

});

} else {

callback("Not a PR");

}

}

module.exports.check_build_status = (event, context, callback) => {

var params = {

ids: [event.id]

}

codebuild.batchGetBuilds(params, function(err, data) {

if (err) {

console.log(err, err.stack);

context.fail(err)

callback(err);

} else {

callback(null, data.builds[0]);

}

});

}

module.exports.build_done = (event, context, callback) => {

// get the necessary variables for the github call

var url = event.source.location.split('/');

var repo = url[url.length-1].replace('.git', '');

var username = url[url.length-2];

console.log('Found commit identifier: ' + event.sourceVersion);

var state = '';

// map the codebuild status to github state

switch(event.buildStatus) {

case 'SUCCEEDED':

state = 'success';

break;

case 'FAILED':

state = 'failure';

break;

case 'FAULT':

case 'STOPPED':

case 'TIMED_OUT':

state = 'error'

default:

state = 'pending'

}

console.log('Github state will be', state);

github.repos.createStatus({

owner: username,

repo: repo,

sha: event.sourceVersion,

state: state,

target_url: 'https://' + region + '.console.aws.amazon.com/codebuild/home?region=' + region + '#/builds/' + event.id + '/view/new',

context: 'CodeBuild',

description: 'Build ' + event.buildStatus + '...'

}).catch(function(err){

console.log(err);

context.fail(data);

});

}