@aws-cdk-testing/cli-integ
Version:
Integration tests for the AWS CDK CLI
324 lines • 42.4 kB
JavaScript
;
var _a, _b;
Object.defineProperty(exports, "__esModule", { value: true });
exports.randomString = exports.rimraf = exports.shell = exports.TestFixture = exports.cloneDirectory = exports.withDefaultFixture = exports.withCdkApp = exports.withAws = void 0;
const child_process = require("child_process");
const fs = require("fs");
const os = require("os");
const path = require("path");
const aws_helpers_1 = require("./aws-helpers");
const resource_pool_1 = require("./resource-pool");
const REGIONS = process.env.AWS_REGIONS
? process.env.AWS_REGIONS.split(',')
: [(_b = (_a = process.env.AWS_REGION) !== null && _a !== void 0 ? _a : process.env.AWS_DEFAULT_REGION) !== null && _b !== void 0 ? _b : 'us-east-1'];
process.stdout.write(`Using regions: ${REGIONS}\n`);
const REGION_POOL = new resource_pool_1.ResourcePool(REGIONS);
/**
* Higher order function to execute a block with an AWS client setup
*
* Allocate the next region from the REGION pool and dispose it afterwards.
*/
function withAws(block) {
return (context) => REGION_POOL.using(async (region) => {
const aws = await aws_helpers_1.AwsClients.forRegion(region, context.output);
await sanityCheck(aws);
return block({ ...context, aws });
});
}
exports.withAws = withAws;
/**
* Higher order function to execute a block with a CDK app fixture
*
* Requires an AWS client to be passed in.
*
* For backwards compatibility with existing tests (so we don't have to change
* too much) the inner block is expected to take a `TestFixture` object.
*/
function withCdkApp(block) {
return async (context) => {
const randy = randomString();
const stackNamePrefix = `cdktest-${randy}`;
const integTestDir = path.join(os.tmpdir(), `cdk-integ-${randy}`);
context.output.write(` Stack prefix: ${stackNamePrefix}\n`);
context.output.write(` Test directory: ${integTestDir}\n`);
context.output.write(` Region: ${context.aws.region}\n`);
await cloneDirectory(path.join(__dirname, 'app'), integTestDir, context.output);
const fixture = new TestFixture(integTestDir, stackNamePrefix, context.output, context.aws);
let success = true;
try {
await fixture.shell(['npm', 'install',
'@aws-cdk/core',
'@aws-cdk/aws-sns',
'@aws-cdk/aws-iam',
'@aws-cdk/aws-lambda',
'@aws-cdk/aws-ssm',
'@aws-cdk/aws-ecr-assets',
'@aws-cdk/aws-cloudformation',
'@aws-cdk/aws-ec2']);
await ensureBootstrapped(fixture);
await block(fixture);
}
catch (e) {
success = false;
throw e;
}
finally {
await fixture.dispose(success);
}
};
}
exports.withCdkApp = withCdkApp;
/**
* Default test fixture for most (all?) integ tests
*
* It's a composition of withAws/withCdkApp, expecting the test block to take a `TestFixture`
* object.
*
* We could have put `withAws(withCdkApp(fixture => { /... actual test here.../ }))` in every
* test declaration but centralizing it is going to make it convenient to modify in the future.
*/
function withDefaultFixture(block) {
return withAws(withCdkApp(block));
// ^~~~~~ this is disappointing TypeScript! Feels like you should have been able to derive this.
}
exports.withDefaultFixture = withDefaultFixture;
/**
* Prepare a target dir byreplicating a source directory
*/
async function cloneDirectory(source, target, output) {
await shell(['rm', '-rf', target], { output });
await shell(['mkdir', '-p', target], { output });
await shell(['cp', '-R', source + '/*', target], { output });
}
exports.cloneDirectory = cloneDirectory;
class TestFixture {
constructor(integTestDir, stackNamePrefix, output, aws) {
this.integTestDir = integTestDir;
this.stackNamePrefix = stackNamePrefix;
this.output = output;
this.aws = aws;
this.qualifier = randomString().slice(0, 10);
this.bucketsToDelete = new Array();
}
log(s) {
this.output.write(`${s}\n`);
}
async shell(command, options = {}) {
return shell(command, {
output: this.output,
cwd: this.integTestDir,
...options,
});
}
async cdkDeploy(stackNames, options = {}) {
var _a, _b;
stackNames = typeof stackNames === 'string' ? [stackNames] : stackNames;
const neverRequireApproval = (_a = options.neverRequireApproval) !== null && _a !== void 0 ? _a : true;
return this.cdk(['deploy',
...(neverRequireApproval ? ['--require-approval=never'] : []), // Default to no approval in an unattended test
...((_b = options.options) !== null && _b !== void 0 ? _b : []), ...this.fullStackName(stackNames)], options);
}
async cdkDestroy(stackNames, options = {}) {
var _a;
stackNames = typeof stackNames === 'string' ? [stackNames] : stackNames;
return this.cdk(['destroy',
'-f', // We never want a prompt in an unattended test
...((_a = options.options) !== null && _a !== void 0 ? _a : []), ...this.fullStackName(stackNames)], options);
}
async cdk(args, options = {}) {
var _a;
const verbose = (_a = options.verbose) !== null && _a !== void 0 ? _a : true;
return this.shell(['cdk', ...(verbose ? ['-v'] : []), ...args], {
...options,
modEnv: {
AWS_REGION: this.aws.region,
AWS_DEFAULT_REGION: this.aws.region,
STACK_NAME_PREFIX: this.stackNamePrefix,
...options.modEnv,
},
});
}
fullStackName(stackNames) {
if (typeof stackNames === 'string') {
return `${this.stackNamePrefix}-${stackNames}`;
}
else {
return stackNames.map(s => `${this.stackNamePrefix}-${s}`);
}
}
/**
* Append this to the list of buckets to potentially delete
*
* At the end of a test, we clean up buckets that may not have gotten destroyed
* (for whatever reason).
*/
rememberToDeleteBucket(bucketName) {
this.bucketsToDelete.push(bucketName);
}
/**
* Cleanup leftover stacks and buckets
*/
async dispose(success) {
const stacksToDelete = await this.deleteableStacks(this.stackNamePrefix);
// Bootstrap stacks have buckets that need to be cleaned
const bucketNames = stacksToDelete.map(stack => aws_helpers_1.outputFromStack('BucketName', stack)).filter(defined);
await Promise.all(bucketNames.map(b => this.aws.emptyBucket(b)));
// Bootstrap stacks have ECR repositories with images which should be deleted
const imageRepositoryNames = stacksToDelete.map(stack => aws_helpers_1.outputFromStack('ImageRepositoryName', stack)).filter(defined);
await Promise.all(imageRepositoryNames.map(r => this.aws.deleteImageRepository(r)));
await this.aws.deleteStacks(...stacksToDelete.map(s => s.StackName));
// We might have leaked some buckets by upgrading the bootstrap stack. Be
// sure to clean everything.
for (const bucket of this.bucketsToDelete) {
await this.aws.deleteBucket(bucket);
}
// If the tests completed successfully, happily delete the fixture
// (otherwise leave it for humans to inspect)
if (success) {
rimraf(this.integTestDir);
}
}
/**
* Return the stacks starting with our testing prefix that should be deleted
*/
async deleteableStacks(prefix) {
var _a;
const statusFilter = [
'CREATE_IN_PROGRESS', 'CREATE_FAILED', 'CREATE_COMPLETE',
'ROLLBACK_IN_PROGRESS', 'ROLLBACK_FAILED', 'ROLLBACK_COMPLETE',
'DELETE_FAILED',
'UPDATE_IN_PROGRESS', 'UPDATE_COMPLETE_CLEANUP_IN_PROGRESS',
'UPDATE_COMPLETE', 'UPDATE_ROLLBACK_IN_PROGRESS',
'UPDATE_ROLLBACK_FAILED',
'UPDATE_ROLLBACK_COMPLETE_CLEANUP_IN_PROGRESS',
'UPDATE_ROLLBACK_COMPLETE', 'REVIEW_IN_PROGRESS',
'IMPORT_IN_PROGRESS', 'IMPORT_COMPLETE',
'IMPORT_ROLLBACK_IN_PROGRESS', 'IMPORT_ROLLBACK_FAILED',
'IMPORT_ROLLBACK_COMPLETE',
];
const response = await this.aws.cloudFormation('describeStacks', {});
return ((_a = response.Stacks) !== null && _a !== void 0 ? _a : [])
.filter(s => s.StackName.startsWith(prefix))
.filter(s => statusFilter.includes(s.StackStatus))
.filter(s => s.RootId === undefined); // Only delete parent stacks. Nested stacks are deleted in the process
}
}
exports.TestFixture = TestFixture;
/**
* Perform a one-time quick sanity check that the AWS clients has properly configured credentials
*
* If we don't do this, calls are going to fail and they'll be retried and everything will take
* forever before the user notices a simple misconfiguration.
*
* We can't check for the presence of environment variables since credentials could come from
* anywhere, so do simple account retrieval.
*
* Only do it once per process.
*/
async function sanityCheck(aws) {
if (sanityChecked === undefined) {
try {
await aws.account();
sanityChecked = true;
}
catch (e) {
sanityChecked = false;
throw new Error(`AWS credentials probably not configured, got error: ${e.message}`);
}
}
if (!sanityChecked) {
throw new Error('AWS credentials probably not configured, see previous error');
}
}
let sanityChecked;
/**
* Make sure that the given environment is bootstrapped
*
* Since we go striping across regions, it's going to suck doing this
* by hand so let's just mass-automate it.
*/
async function ensureBootstrapped(fixture) {
// Old-style bootstrap stack with default name
if (await fixture.aws.stackStatus('CDKToolkit') === undefined) {
await fixture.cdk(['bootstrap', `aws://${await fixture.aws.account()}/${fixture.aws.region}`]);
}
}
/**
* A shell command that does what you want
*
* Is platform-aware, handles errors nicely.
*/
async function shell(command, options = {}) {
var _a, _b;
if (options.modEnv && options.env) {
throw new Error('Use either env or modEnv but not both');
}
(_a = options.output) === null || _a === void 0 ? void 0 : _a.write(`💻 ${command.join(' ')}\n`);
const env = (_b = options.env) !== null && _b !== void 0 ? _b : (options.modEnv ? { ...process.env, ...options.modEnv } : undefined);
const child = child_process.spawn(command[0], command.slice(1), {
...options,
env,
// Need this for Windows where we want .cmd and .bat to be found as well.
shell: true,
stdio: ['ignore', 'pipe', 'pipe'],
});
return new Promise((resolve, reject) => {
const stdout = new Array();
const stderr = new Array();
child.stdout.on('data', chunk => {
var _a;
(_a = options.output) === null || _a === void 0 ? void 0 : _a.write(chunk);
stdout.push(chunk);
});
child.stderr.on('data', chunk => {
var _a, _b;
(_a = options.output) === null || _a === void 0 ? void 0 : _a.write(chunk);
if ((_b = options.captureStderr) !== null && _b !== void 0 ? _b : true) {
stderr.push(chunk);
}
});
child.once('error', reject);
child.once('close', code => {
if (code === 0 || options.allowErrExit) {
resolve((Buffer.concat(stdout).toString('utf-8') + Buffer.concat(stderr).toString('utf-8')).trim());
}
else {
reject(new Error(`'${command.join(' ')}' exited with error code ${code}`));
}
});
});
}
exports.shell = shell;
function defined(x) {
return x !== undefined;
}
/**
* rm -rf reimplementation, don't want to depend on an NPM package for this
*/
function rimraf(fsPath) {
try {
const isDir = fs.lstatSync(fsPath).isDirectory();
if (isDir) {
for (const file of fs.readdirSync(fsPath)) {
rimraf(path.join(fsPath, file));
}
fs.rmdirSync(fsPath);
}
else {
fs.unlinkSync(fsPath);
}
}
catch (e) {
// We will survive ENOENT
if (e.code !== 'ENOENT') {
throw e;
}
}
}
exports.rimraf = rimraf;
function randomString() {
// Crazy
return Math.random().toString(36).replace(/[^a-z0-9]+/g, '');
}
exports.randomString = randomString;
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* as child_process from 'child_process';\nimport * as fs from 'fs';\nimport * as os from 'os';\nimport * as path from 'path';\nimport { outputFromStack, AwsClients } from './aws-helpers';\nimport { ResourcePool } from './resource-pool';\nimport { TestContext } from './test-helpers';\n\nconst REGIONS = process.env.AWS_REGIONS\n  ? process.env.AWS_REGIONS.split(',')\n  : [process.env.AWS_REGION ?? process.env.AWS_DEFAULT_REGION ?? 'us-east-1'];\n\nprocess.stdout.write(`Using regions: ${REGIONS}\\n`);\n\nconst REGION_POOL = new ResourcePool(REGIONS);\n\n\nexport type AwsContext = { readonly aws: AwsClients };\n\n/**\n * Higher order function to execute a block with an AWS client setup\n *\n * Allocate the next region from the REGION pool and dispose it afterwards.\n */\nexport function withAws<A extends TestContext>(block: (context: A & AwsContext) => Promise<void>) {\n  return (context: A) => REGION_POOL.using(async (region) => {\n    const aws = await AwsClients.forRegion(region, context.output);\n    await sanityCheck(aws);\n\n    return block({ ...context, aws });\n  });\n}\n\n/**\n * Higher order function to execute a block with a CDK app fixture\n *\n * Requires an AWS client to be passed in.\n *\n * For backwards compatibility with existing tests (so we don't have to change\n * too much) the inner block is expected to take a `TestFixture` object.\n */\nexport function withCdkApp<A extends TestContext & AwsContext>(block: (context: TestFixture) => Promise<void>) {\n  return async (context: A) => {\n    const randy = randomString();\n    const stackNamePrefix = `cdktest-${randy}`;\n    const integTestDir = path.join(os.tmpdir(), `cdk-integ-${randy}`);\n\n    context.output.write(` Stack prefix:   ${stackNamePrefix}\\n`);\n    context.output.write(` Test directory: ${integTestDir}\\n`);\n    context.output.write(` Region:         ${context.aws.region}\\n`);\n\n    await cloneDirectory(path.join(__dirname, 'app'), integTestDir, context.output);\n    const fixture = new TestFixture(\n      integTestDir,\n      stackNamePrefix,\n      context.output,\n      context.aws);\n\n    let success = true;\n    try {\n      await fixture.shell(['npm', 'install',\n        '@aws-cdk/core',\n        '@aws-cdk/aws-sns',\n        '@aws-cdk/aws-iam',\n        '@aws-cdk/aws-lambda',\n        '@aws-cdk/aws-ssm',\n        '@aws-cdk/aws-ecr-assets',\n        '@aws-cdk/aws-cloudformation',\n        '@aws-cdk/aws-ec2']);\n\n      await ensureBootstrapped(fixture);\n\n      await block(fixture);\n    } catch (e) {\n      success = false;\n      throw e;\n    } finally {\n      await fixture.dispose(success);\n    }\n  };\n}\n\n/**\n * Default test fixture for most (all?) integ tests\n *\n * It's a composition of withAws/withCdkApp, expecting the test block to take a `TestFixture`\n * object.\n *\n * We could have put `withAws(withCdkApp(fixture => { /... actual test here.../ }))` in every\n * test declaration but centralizing it is going to make it convenient to modify in the future.\n */\nexport function withDefaultFixture(block: (context: TestFixture) => Promise<void>) {\n  return withAws<TestContext>(withCdkApp(block));\n  //              ^~~~~~ this is disappointing TypeScript! Feels like you should have been able to derive this.\n}\n\nexport interface ShellOptions extends child_process.SpawnOptions {\n  /**\n   * Properties to add to 'env'\n   */\n  modEnv?: Record<string, string>;\n\n  /**\n   * Don't fail when exiting with an error\n   *\n   * @default false\n   */\n  allowErrExit?: boolean;\n\n  /**\n   * Whether to capture stderr\n   *\n   * @default true\n   */\n  captureStderr?: boolean;\n\n  /**\n   * Pass output here\n   */\n  output?: NodeJS.WritableStream;\n}\n\nexport interface CdkCliOptions extends ShellOptions {\n  options?: string[];\n  neverRequireApproval?: boolean;\n  verbose?: boolean;\n}\n\n/**\n * Prepare a target dir byreplicating a source directory\n */\nexport async function cloneDirectory(source: string, target: string, output?: NodeJS.WritableStream) {\n  await shell(['rm', '-rf', target], { output });\n  await shell(['mkdir', '-p', target], { output });\n  await shell(['cp', '-R', source + '/*', target], { output });\n}\n\nexport class TestFixture {\n  public readonly qualifier = randomString().substr(0, 10);\n  private readonly bucketsToDelete = new Array<string>();\n\n  constructor(\n    public readonly integTestDir: string,\n    public readonly stackNamePrefix: string,\n    public readonly output: NodeJS.WritableStream,\n    public readonly aws: AwsClients) {\n  }\n\n  public log(s: string) {\n    this.output.write(`${s}\\n`);\n  }\n\n  public async shell(command: string[], options: Omit<ShellOptions, 'cwd'|'output'> = {}): Promise<string> {\n    return shell(command, {\n      output: this.output,\n      cwd: this.integTestDir,\n      ...options,\n    });\n  }\n\n  public async cdkDeploy(stackNames: string | string[], options: CdkCliOptions = {}) {\n    stackNames = typeof stackNames === 'string' ? [stackNames] : stackNames;\n\n    const neverRequireApproval = options.neverRequireApproval ?? true;\n\n    return this.cdk(['deploy',\n      ...(neverRequireApproval ? ['--require-approval=never'] : []), // Default to no approval in an unattended test\n      ...(options.options ?? []),\n      ...this.fullStackName(stackNames)], options);\n  }\n\n  public async cdkDestroy(stackNames: string | string[], options: CdkCliOptions = {}) {\n    stackNames = typeof stackNames === 'string' ? [stackNames] : stackNames;\n\n    return this.cdk(['destroy',\n      '-f', // We never want a prompt in an unattended test\n      ...(options.options ?? []),\n      ...this.fullStackName(stackNames)], options);\n  }\n\n  public async cdk(args: string[], options: CdkCliOptions = {}) {\n    const verbose = options.verbose ?? true;\n\n    return this.shell(['cdk', ...(verbose ? ['-v'] : []), ...args], {\n      ...options,\n      modEnv: {\n        AWS_REGION: this.aws.region,\n        AWS_DEFAULT_REGION: this.aws.region,\n        STACK_NAME_PREFIX: this.stackNamePrefix,\n        ...options.modEnv,\n      },\n    });\n  }\n\n  public fullStackName(stackName: string): string;\n  public fullStackName(stackNames: string[]): string[];\n  public fullStackName(stackNames: string | string[]): string | string[] {\n    if (typeof stackNames === 'string') {\n      return `${this.stackNamePrefix}-${stackNames}`;\n    } else {\n      return stackNames.map(s => `${this.stackNamePrefix}-${s}`);\n    }\n  }\n\n  /**\n   * Append this to the list of buckets to potentially delete\n   *\n   * At the end of a test, we clean up buckets that may not have gotten destroyed\n   * (for whatever reason).\n   */\n  public rememberToDeleteBucket(bucketName: string) {\n    this.bucketsToDelete.push(bucketName);\n  }\n\n  /**\n   * Cleanup leftover stacks and buckets\n   */\n  public async dispose(success: boolean) {\n    const stacksToDelete = await this.deleteableStacks(this.stackNamePrefix);\n\n    // Bootstrap stacks have buckets that need to be cleaned\n    const bucketNames = stacksToDelete.map(stack => outputFromStack('BucketName', stack)).filter(defined);\n    await Promise.all(bucketNames.map(b => this.aws.emptyBucket(b)));\n\n    // Bootstrap stacks have ECR repositories with images which should be deleted\n    const imageRepositoryNames = stacksToDelete.map(stack => outputFromStack('ImageRepositoryName', stack)).filter(defined);\n    await Promise.all(imageRepositoryNames.map(r => this.aws.deleteImageRepository(r)));\n\n    await this.aws.deleteStacks(...stacksToDelete.map(s => s.StackName));\n\n    // We might have leaked some buckets by upgrading the bootstrap stack. Be\n    // sure to clean everything.\n    for (const bucket of this.bucketsToDelete) {\n      await this.aws.deleteBucket(bucket);\n    }\n\n    // If the tests completed successfully, happily delete the fixture\n    // (otherwise leave it for humans to inspect)\n    if (success) {\n      rimraf(this.integTestDir);\n    }\n  }\n\n  /**\n   * Return the stacks starting with our testing prefix that should be deleted\n   */\n  private async deleteableStacks(prefix: string): Promise<AWS.CloudFormation.Stack[]> {\n    const statusFilter = [\n      'CREATE_IN_PROGRESS', 'CREATE_FAILED', 'CREATE_COMPLETE',\n      'ROLLBACK_IN_PROGRESS', 'ROLLBACK_FAILED', 'ROLLBACK_COMPLETE',\n      'DELETE_FAILED',\n      'UPDATE_IN_PROGRESS', 'UPDATE_COMPLETE_CLEANUP_IN_PROGRESS',\n      'UPDATE_COMPLETE', 'UPDATE_ROLLBACK_IN_PROGRESS',\n      'UPDATE_ROLLBACK_FAILED',\n      'UPDATE_ROLLBACK_COMPLETE_CLEANUP_IN_PROGRESS',\n      'UPDATE_ROLLBACK_COMPLETE', 'REVIEW_IN_PROGRESS',\n      'IMPORT_IN_PROGRESS', 'IMPORT_COMPLETE',\n      'IMPORT_ROLLBACK_IN_PROGRESS', 'IMPORT_ROLLBACK_FAILED',\n      'IMPORT_ROLLBACK_COMPLETE',\n    ];\n\n    const response = await this.aws.cloudFormation('describeStacks', {});\n\n    return (response.Stacks ?? [])\n      .filter(s => s.StackName.startsWith(prefix))\n      .filter(s => statusFilter.includes(s.StackStatus))\n      .filter(s => s.RootId === undefined); // Only delete parent stacks. Nested stacks are deleted in the process\n  }\n}\n\n/**\n * Perform a one-time quick sanity check that the AWS clients has properly configured credentials\n *\n * If we don't do this, calls are going to fail and they'll be retried and everything will take\n * forever before the user notices a simple misconfiguration.\n *\n * We can't check for the presence of environment variables since credentials could come from\n * anywhere, so do simple account retrieval.\n *\n * Only do it once per process.\n */\nasync function sanityCheck(aws: AwsClients) {\n  if (sanityChecked === undefined) {\n    try {\n      await aws.account();\n      sanityChecked = true;\n    } catch (e) {\n      sanityChecked = false;\n      throw new Error(`AWS credentials probably not configured, got error: ${e.message}`);\n    }\n  }\n  if (!sanityChecked) {\n    throw new Error('AWS credentials probably not configured, see previous error');\n  }\n}\nlet sanityChecked: boolean | undefined;\n\n/**\n * Make sure that the given environment is bootstrapped\n *\n * Since we go striping across regions, it's going to suck doing this\n * by hand so let's just mass-automate it.\n */\nasync function ensureBootstrapped(fixture: TestFixture) {\n  // Old-style bootstrap stack with default name\n  if (await fixture.aws.stackStatus('CDKToolkit') === undefined) {\n    await fixture.cdk(['bootstrap', `aws://${await fixture.aws.account()}/${fixture.aws.region}`]);\n  }\n}\n\n/**\n * A shell command that does what you want\n *\n * Is platform-aware, handles errors nicely.\n */\nexport async function shell(command: string[], options: ShellOptions = {}): Promise<string> {\n  if (options.modEnv && options.env) {\n    throw new Error('Use either env or modEnv but not both');\n  }\n\n  options.output?.write(`💻 ${command.join(' ')}\\n`);\n\n  const env = options.env ?? (options.modEnv ? { ...process.env, ...options.modEnv } : undefined);\n\n  const child = child_process.spawn(command[0], command.slice(1), {\n    ...options,\n    env,\n    // Need this for Windows where we want .cmd and .bat to be found as well.\n    shell: true,\n    stdio: ['ignore', 'pipe', 'pipe'],\n  });\n\n  return new Promise<string>((resolve, reject) => {\n    const stdout = new Array<Buffer>();\n    const stderr = new Array<Buffer>();\n\n    child.stdout!.on('data', chunk => {\n      options.output?.write(chunk);\n      stdout.push(chunk);\n    });\n\n    child.stderr!.on('data', chunk => {\n      options.output?.write(chunk);\n      if (options.captureStderr ?? true) {\n        stderr.push(chunk);\n      }\n    });\n\n    child.once('error', reject);\n\n    child.once('close', code => {\n      if (code === 0 || options.allowErrExit) {\n        resolve((Buffer.concat(stdout).toString('utf-8') + Buffer.concat(stderr).toString('utf-8')).trim());\n      } else {\n        reject(new Error(`'${command.join(' ')}' exited with error code ${code}`));\n      }\n    });\n  });\n}\n\nfunction defined<A>(x: A): x is NonNullable<A> {\n  return x !== undefined;\n}\n\n/**\n * rm -rf reimplementation, don't want to depend on an NPM package for this\n */\nexport function rimraf(fsPath: string) {\n  try {\n    const isDir = fs.lstatSync(fsPath).isDirectory();\n\n    if (isDir) {\n      for (const file of fs.readdirSync(fsPath)) {\n        rimraf(path.join(fsPath, file));\n      }\n      fs.rmdirSync(fsPath);\n    } else {\n      fs.unlinkSync(fsPath);\n    }\n  } catch (e) {\n    // We will survive ENOENT\n    if (e.code !== 'ENOENT') { throw e; }\n  }\n}\n\nexport function randomString() {\n  // Crazy\n  return Math.random().toString(36).replace(/[^a-z0-9]+/g, '');\n}"]}