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/**

* @license

* Copyright Google Inc. All Rights Reserved.

*

* Use of this source code is governed by an MIT-style license that can be

* found in the LICENSE file at https://angular.io/license

*/

// tslint:disable:no-implicit-dependencies

import { logging } from '@angular-devkit/core';

import { execSync } from 'child_process';

export default function (opts: { sha: string }, logger: logging.Logger) {

const authors = execSync(`git log ${opts.sha}.. --format="%aN"`).toString();

const counter = new Map<string, number>();

for (const name of authors.split(/\r?\n/g)) {

if (name) {

const maybeCounter = counter.get(name);

counter.set(name, (maybeCounter || 0) + 1);

}

}

const sortedCount = [...counter.entries()].sort((a, b) => b[1] - a[1]);

for (const count of sortedCount) {

logger.info(count[0] + ' ' + count[1]);

}

}