// tslint:disable:no-global-tslint-disable file-header

import { tags, terminal } from '@angular-devkit/core';

import * as path from 'path';

import { SemVer, satisfies } from 'semver';

import { isWarningEnabled } from '../utilities/config';

import { requireProjectModule } from '../utilities/require-project-module';

export class Version {

private _semver: SemVer | null = null;

constructor(private _version: string | null = null) {

this._semver = _version ? new SemVer(_version) : null;

}

isAlpha() { return this.qualifier == 'alpha'; }

isBeta() { return this.qualifier == 'beta'; }

isReleaseCandidate() { return this.qualifier == 'rc'; }

isKnown() { return this._version !== null; }

isLocal() { return this.isKnown() && this._version && path.isAbsolute(this._version); }

isGreaterThanOrEqualTo(other: SemVer) {

return this._semver !== null && this._semver.compare(other) >= 0;

}

get major() { return this._semver ? this._semver.major : 0; }

get minor() { return this._semver ? this._semver.minor : 0; }

get patch() { return this._semver ? this._semver.patch : 0; }

get qualifier() { return this._semver ? this._semver.prerelease[0] : ''; }

get extra() { return this._semver ? this._semver.prerelease[1] : ''; }

toString() { return this._version; }

static assertCompatibleAngularVersion(projectRoot: string) {

let angularPkgJson;

let rxjsPkgJson;

const isInside = (base: string, potential: string): boolean => {

const absoluteBase = path.resolve(base);

const absolutePotential = path.resolve(potential);

const relativePotential = path.relative(absoluteBase, absolutePotential);

if (!relativePotential.startsWith('..') && !path.isAbsolute(relativePotential)) {

return true;

}

return false;

};

try {

const resolveOptions = { paths: [ path.join(projectRoot, 'node_modules'), projectRoot ] };

const angularPackagePath = require.resolve('@angular/core/package.json', resolveOptions);

const rxjsPackagePath = require.resolve('rxjs/package.json', resolveOptions);

if (!isInside(projectRoot, angularPackagePath)

|| !isInside(projectRoot, rxjsPackagePath)) {

throw new Error();

}

angularPkgJson = require(angularPackagePath);

rxjsPkgJson = require(rxjsPackagePath);

} catch {

console.error(terminal.bold(terminal.red(tags.stripIndents`

You seem to not be depending on "@angular/core" and/or "rxjs". This is an error.

`)));

process.exit(2);

}

if (!(angularPkgJson && angularPkgJson['version'] && rxjsPkgJson && rxjsPkgJson['version'])) {

console.error(terminal.bold(terminal.red(tags.stripIndents`

Cannot determine versions of "@angular/core" and/or "rxjs".

This likely means your local installation is broken. Please reinstall your packages.

`)));

process.exit(2);

}

const angularVersion = new Version(angularPkgJson['version']);

const rxjsVersion = new Version(rxjsPkgJson['version']);

if (angularVersion.isLocal()) {

console.warn(terminal.yellow('Using a local version of angular. Proceeding with care...'));

return;

}

if (!angularVersion.isGreaterThanOrEqualTo(new SemVer('5.0.0'))) {

console.error(terminal.bold(terminal.red(tags.stripIndents`

This version of CLI is only compatible with Angular version 5.0.0 or higher.

Please visit the link below to find instructions on how to update Angular.

https://angular-update-guide.firebaseapp.com/

` + '\n')));

process.exit(3);

} else if (

angularVersion.isGreaterThanOrEqualTo(new SemVer('6.0.0-rc.0'))

&& !rxjsVersion.isGreaterThanOrEqualTo(new SemVer('5.6.0-forward-compat.0'))

&& !rxjsVersion.isGreaterThanOrEqualTo(new SemVer('6.0.0-beta.0'))

) {

console.error(terminal.bold(terminal.red(tags.stripIndents`

This project uses version ${rxjsVersion} of RxJs, which is not supported by Angular v6.

The official RxJs version that is supported is 5.6.0-forward-compat.0 and greater.

Please visit the link below to find instructions on how to update RxJs.

https://docs.google.com/document/d/12nlLt71VLKb-z3YaSGzUfx6mJbc34nsMXtByPUN35cg/edit#

` + '\n')));

process.exit(3);

} else if (

angularVersion.isGreaterThanOrEqualTo(new SemVer('6.0.0-rc.0'))

&& !rxjsVersion.isGreaterThanOrEqualTo(new SemVer('6.0.0-beta.0'))

) {

console.warn(terminal.bold(terminal.red(tags.stripIndents`

This project uses a temporary compatibility version of RxJs (${rxjsVersion}).

Please visit the link below to find instructions on how to update RxJs.

https://docs.google.com/document/d/12nlLt71VLKb-z3YaSGzUfx6mJbc34nsMXtByPUN35cg/edit#

` + '\n')));

}

}

static assertTypescriptVersion(projectRoot: string) {

if (!isWarningEnabled('typescriptMismatch')) {

return;

}

let compilerVersion: string, tsVersion: string;

try {

compilerVersion = requireProjectModule(projectRoot, '@angular/compiler-cli').VERSION.full;

tsVersion = requireProjectModule(projectRoot, 'typescript').version;

} catch {

console.error(terminal.bold(terminal.red(tags.stripIndents`

Versions of @angular/compiler-cli and typescript could not be determined.

The most common reason for this is a broken npm install.

Please make sure your package.json contains both @angular/compiler-cli and typescript in

devDependencies, then delete node_modules and package-lock.json (if you have one) and

run npm install again.

`)));

process.exit(2);

return;

}

const versionCombos = [

{ compiler: '>=2.3.1 <3.0.0', typescript: '>=2.0.2 <2.3.0' },

{ compiler: '>=4.0.0-beta.0 <5.0.0', typescript: '>=2.1.0 <2.4.0' },

{ compiler: '>=5.0.0-beta.0 <5.1.0', typescript: '>=2.4.2 <2.5.0' },

{ compiler: '>=5.1.0-beta.0 <5.2.0', typescript: '>=2.4.2 <2.6.0' },

{ compiler: '>=5.2.0-beta.0 <6.0.0', typescript: '>=2.4.2 <2.7.0' },

{ compiler: '>=6.0.0-beta.0 <7.0.0', typescript: '>=2.7.0 <2.8.0' },

];

const currentCombo = versionCombos.find((combo) => satisfies(compilerVersion, combo.compiler));

if (currentCombo && !satisfies(tsVersion, currentCombo.typescript)) {

// First line of warning looks weird being split in two, disable tslint for it.

console.log((terminal.yellow('\n' + tags.stripIndent`

@angular/compiler-cli@${compilerVersion} requires typescript@'${

currentCombo.typescript}' but ${tsVersion} was found instead.

Using this version can result in undefined behaviour and difficult to debug problems.

Please run the following command to install a compatible version of TypeScript.

npm install typescript@'${currentCombo.typescript}'

To disable this warning run "ng config cli.warnings.typescriptMismatch false".

` + '\n')));

}

}

}