woocommerce/plugins/woocommerce-admin/bin/packages/watch.js

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/**
* External dependencies
*/
const fs = require( 'fs' );
const { execSync } = require( 'child_process' );
const path = require( 'path' );
const chalk = require( 'chalk' );
/**
* Internal dependencies
*/
const getPackages = require( './get-packages' );
const BUILD_CMD = `node ${ path.resolve( __dirname, './build.js' ) }`;
let filesToBuild = new Map();
const exists = ( filename ) => {
try {
return fs.statSync( filename ).isFile();
} catch ( e ) {}
return false;
};
// Exclude deceitful source-like files, such as editor swap files.
const isSourceFile = ( filename ) => {
return /.\.(js|scss)$/.test( filename );
};
const rebuild = ( filename ) => filesToBuild.set( filename, true );
getPackages().forEach( ( p ) => {
const srcDir = path.resolve( p, 'src' );
try {
fs.accessSync( srcDir, fs.F_OK );
fs.watch( path.resolve( p, 'src' ), { recursive: true }, ( event, filename ) => {
const filePath = path.resolve( srcDir, filename );
if ( ! isSourceFile( filename ) ) {
return;
}
if ( ( event === 'change' || event === 'rename' ) && exists( filePath ) ) {
// eslint-disable-next-line no-console
console.log( chalk.green( '->' ), `${ event }: ${ filename }` );
rebuild( filePath );
} else {
const buildFile = path.resolve( srcDir, '..', 'build', filename );
try {
fs.unlinkSync( buildFile );
process.stdout.write(
chalk.red( ' \u2022 ' ) +
path.relative( path.resolve( srcDir, '..', '..' ), buildFile ) +
' (deleted)' +
'\n'
);
} catch ( e ) {}
}
} );
} catch ( e ) {
// doesn't exist
}
} );
setInterval( () => {
const files = Array.from( filesToBuild.keys() );
if ( files.length ) {
filesToBuild = new Map();
try {
execSync( `${ BUILD_CMD } ${ files.join( ' ' ) }`, { stdio: [ 0, 1, 2 ] } );
} catch ( e ) {}
}
}, 100 );
// eslint-disable-next-line no-console
console.log( chalk.red( '->' ), chalk.cyan( 'Watching for changes...' ) );