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79 lines
2.6 KiB
79 lines
2.6 KiB
/**
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* This file decorates the Angular CLI with the Nx CLI to enable features such as computation caching
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* and faster execution of tasks.
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*
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* It does this by:
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*
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* - Patching the Angular CLI to warn you in case you accidentally use the undecorated ng command.
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* - Symlinking the ng to nx command, so all commands run through the Nx CLI
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* - Updating the package.json postinstall script to give you control over this script
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*
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* The Nx CLI decorates the Angular CLI, so the Nx CLI is fully compatible with it.
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* Every command you run should work the same when using the Nx CLI, except faster.
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*
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* Because of symlinking you can still type `ng build/test/lint` in the terminal. The ng command, in this case,
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* will point to nx, which will perform optimizations before invoking ng. So the Angular CLI is always invoked.
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* The Nx CLI simply does some optimizations before invoking the Angular CLI.
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*
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* To opt out of this patch:
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* - Replace occurrences of nx with ng in your package.json
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* - Remove the script from your postinstall script in your package.json
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* - Delete and reinstall your node_modules
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*/
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const fs = require('fs');
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const os = require('os');
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const cp = require('child_process');
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const isWindows = os.platform() === 'win32';
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let output;
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try {
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output = require('@nx/workspace').output;
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} catch (e) {
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console.warn(
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'Angular CLI could not be decorated to enable computation caching. Please ensure @nx/workspace is installed.'
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);
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process.exit(0);
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}
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/**
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* Symlink of ng to nx, so you can keep using `ng build/test/lint` and still
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* invoke the Nx CLI and get the benefits of computation caching.
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*/
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function symlinkNgCLItoNxCLI() {
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try {
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const ngPath = './node_modules/.bin/ng';
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const nxPath = './node_modules/.bin/nx';
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if (isWindows) {
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/**
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* This is the most reliable way to create symlink-like behavior on Windows.
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* Such that it works in all shells and works with npx.
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*/
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['', '.cmd', '.ps1'].forEach((ext) => {
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if (fs.existsSync(nxPath + ext))
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fs.writeFileSync(ngPath + ext, fs.readFileSync(nxPath + ext));
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});
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} else {
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// If unix-based, symlink
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cp.execSync(`ln -sf ./nx ${ngPath}`);
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}
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} catch (e) {
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output.error({
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title:
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'Unable to create a symlink from the Angular CLI to the Nx CLI:' +
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e.message
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});
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throw e;
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}
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}
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try {
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symlinkNgCLItoNxCLI();
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require('@nrwl/cli/lib/decorate-cli').decorateCli();
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output.log({
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title: 'Angular CLI has been decorated to enable computation caching.'
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});
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} catch (e) {
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output.error({
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title: 'Decoration of the Angular CLI did not complete successfully'
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});
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}
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