Ionic/Cordova hook to remove junk from release build

030_junkcleanup.js

#!/usr/bin/env node

var fs = require('fs');
var path = require('path');

var rootDir = process.argv[2];
var platformPath = path.join(rootDir, 'platforms');
var platform = process.env.CORDOVA_PLATFORMS;
var cliCommand = process.env.CORDOVA_CMDLINE;

// hook configuration
//var isRelease = true; // by default this hook is always enabled, see the line below on how to execute it only for release
var isRelease = (cliCommand.indexOf('--release') > -1);
var recursiveFolderSearch = true; // set this to false to manually indicate the folders to process
var foldersToProcess = [ // add other www folders in here if needed (ex. js/controllers)
    'lib'
];
var junkPatterns = [ // add filename regex patterns to identify junk files
    /^(?!.*www\/lib\/.*\.(js|css|map)$)/, // All library files except .js and .css
    /\/www\/lib\/.*\/src\/.*/, // All library original sources
    /\/www\/lib\/.*\/examples\/.*/, // All library examples
    /\/www\/lib\/.*\/tutorials\/.*/ // All library tutorials
];

if (!isRelease) {
    return;
}

switch (platform) {
    case 'android':
        platformPath = path.join(platformPath, platform, 'assets', 'www');
        break;
    case 'ios':
        platformPath = path.join(platformPath, platform, 'www');
        break;
    default:
        console.log('this hook only supports android and ios currently');
        return;
}

foldersToProcess.forEach(function(folder) {
    processFiles(path.join(platformPath, folder));
});

function processFiles(dir) {
    fs.readdir(dir, function (err, list) {
        if (err) {
            console.log('processFiles err: ' + err);
            return;
        }
        list.forEach(function(file) {
            file = path.join(dir, file);
            fs.stat(file, function(err, stat) {
                if (stat.isDirectory()) {
                    if (recursiveFolderSearch ) {
                        processFiles(file);
                    }
                } else {
                    cleanFile(file);
                }
            });
        });
    });
}

function cleanFile(file) {
    var isJunk = false;
    var i;
    var len = junkPatterns.length;
    for (i = 0; i < len; i++) {
        if (junkPatterns[i].test(file)) {
            isJunk = true;
            break;
        }
    }

    if (isJunk) {
        fs.unlink(file, function (error) {
            console.log("Removed file " + file);
        });
    }
}