gulpfile.js

'use strict';

const build = require('@microsoft/sp-build-web');

build.addSuppression(`Warning - [sass] The local CSS class 'ms-Grid' is not camelCase and will not be type-safe.`);

//BEGIN: Added code for version-sync
let syncVersionsSubtask = build.subTask('version-sync', function (gulp, buildOptions, done) {
    this.log('Synching versions');

    // import gulp utilits to write error messages
    const gutil = require('gulp-util');
    this.log('after gulp-util');

    // import file system utilities form nodeJS
    const fs = require('fs');
    this.log('after fs');

    // read package.json
    var pkgConfig = require('./package.json');
    this.log('after package.json');

    // read configuration of web part solution file
    var pkgSolution = require('./config/package-solution.json');
    this.log('after package-solution');

    // log old version
    this.log('package-solution.json version:\t' + pkgSolution.solution.version);

    // Generate new MS compliant version number
    var newVersionNumber = pkgConfig.version.split('-')[0] + '.0';

    if (pkgSolution.solution.version !== newVersionNumber) {
        // assign newly generated version number to web part version
        pkgSolution.solution.version = newVersionNumber;

        // log new version
        this.log('New package-solution.json version:\t' + pkgSolution.solution.version);

        // write changed package-solution file
        //     fs.writeFile('./config/package-solution.json', JSON.stringify(pkgSolution, null, 4));
        fs.writeFile('./config/package-solution.json', JSON.stringify(pkgSolution, null, 4), (err) => {
            if (err) throw err;
        });
    }
    else {
        this.log('package-solution.json version is up-to-date');
    }
    done();
});

let syncVersionTask = build.task('version-sync', syncVersionsSubtask);

build.rig.addPreBuildTask(syncVersionTask);
//END: Added code for version-sync

build.initialize(require('gulp'));