gulpfile.js

const gulp = require('gulp');
const path = require('path');

const ts = require('gulp-typescript');
const typescript = require('typescript');
const sourcemaps = require('gulp-sourcemaps');
const del = require('del');
const runSequence = require('run-sequence');
const es = require('event-stream');
const vsce = require('vsce');
const nls = require('vscode-nls-dev');

const tsProject = ts.createProject('./tsconfig.json', { typescript });

const inlineMap = true;
const inlineSource = false;
const outDest = 'out';

// If all VS Code langaues are support you can use nls.coreLanguages
const languages = [{ folderName: 'rus', id: 'ru' }];

const cleanTask = function() {
    return del(['out/**', 'package.nls.*.json', 'qbs-tools*.vsix']);
}

const internalCompileTask = function() {
    return doCompile(false);
};

const internalNlsCompileTask = function() {
    return doCompile(true);
};

const addI18nTask = function() {
    return gulp.src(['package.nls.json'])
        .pipe(nls.createAdditionalLanguageFiles(languages, 'i18n'))
        .pipe(gulp.dest('.'));
};

const buildTask = gulp.series(cleanTask, internalNlsCompileTask, addI18nTask);

const doCompile = function (buildNls) {
    var r = tsProject.src()
        .pipe(sourcemaps.init())
        .pipe(tsProject()).js
        .pipe(buildNls ? nls.rewriteLocalizeCalls() : es.through())
        .pipe(buildNls ? nls.createAdditionalLanguageFiles(languages, 'i18n', 'src') : es.through());

    if (inlineMap && inlineSource) {
        r = r.pipe(sourcemaps.write());
    } else {
        r = r.pipe(sourcemaps.write("../out", {
            // no inlined source
            includeContent: inlineSource,
            // Return relative source map root directories per file.
            sourceRoot: "../src"
        }));
    }

    return r.pipe(gulp.dest(outDest));
}

const vscePublishTask = function() {
    return vsce.publish();
};

const vscePackageTask = function() {
    return vsce.createVSIX();
};

gulp.task('default', buildTask);

gulp.task('clean', cleanTask);

gulp.task('compile', gulp.series(cleanTask, internalCompileTask));

gulp.task('build', buildTask);

gulp.task('publish', gulp.series(buildTask, vscePublishTask));

gulp.task('package', gulp.series(buildTask, vscePackageTask));