Merged PR 448189: Prepare the build script

.gitignore

@@ -5,4 +5,5 @@ bin/
 **/lib/
 maven-wrapper.jar
 cmd/repository/
-cmd/workspace/
+cmd/workspace/
+*.tgz

cmd/.npmignore

@@ -0,0 +1,4 @@
+node_modules/
+workspace/
+gulpfile.js
+*.tgz

cmd/.npmrc

@@ -0,0 +1,2 @@
+registry=https://devdiv.pkgs.visualstudio.com/_packaging/CloudKernel/npm/registry/
+always-auth=true

cmd/gulpfile.js

@@ -0,0 +1,35 @@
+const gulp = require('gulp');
+const cp = require('child_process');
+const path = require('path');
+const fs = require('fs');
+const glob = require('glob');
+const rimraf = require("rimraf");
+
+const rootPath = path.join(__dirname, '..');
+
+gulp.task('clean', (done) => {
+    rimraf.sync(path.join(__dirname, 'repository'));
+    rimraf.sync(path.join(__dirname, 'workspace'));
+    const packages = glob.sync('*.tgz');
+    for (const package of packages) {
+        fs.unlinkSync(package);
+    }
+    done();
+});
+
+gulp.task('build-indexer', (done) => {
+    cp.execSync(`${mvnw()} clean verify`, { cwd: rootPath, stdio: [0, 1, 2] });
+    gulp.src(path.join(rootPath, 'com.microsoft.java.lsif.product', 'target', 'repository', '**/*'))
+        .pipe(gulp.dest(path.join(rootPath, 'cmd', 'repository')));
+    done();
+});
+
+gulp.task('build', gulp.series('clean', 'build-indexer'));
+
+function isWin() {
+    return /^win/.test(process.platform);
+}
+
+function mvnw() {
+    return isWin() ? 'mvnw.cmd' : './mvnw';
+}