Added gulp task to auto-point to node-h2 binary

gulpfile.js

@@ -1,3 +1,4 @@
+const { execFile } = require('child_process');
 const gulp = require('gulp');
 const merge2 = require('merge2');
 const path = require('path');
@@ -34,6 +35,24 @@ function makeCompileFn(dev) {
   };
 }
 
+/**
+ * If process.env.NODE_H2 is defined and nvm is installed, uses nvm to set
+ * $NODE_H2 as the default node binary (with --expose-http2 included).
+ */
+gulp.task('h2-setup', () => {
+  return new Promise((resolve, reject) => {
+    execFile('./setup.sh', (err, stdout, stderr) => {
+      (stdout = stdout.trim()) && console.log(stdout);
+      (stderr = stderr.trim()) && console.error(stderr);
+      if (err) {
+        reject(err);
+      } else {
+        resolve();
+      }
+    });
+  });
+})
+
 /**
  * Runs tslint on files in src/, with linting rules defined in tslint.json.
  */

package.json

@@ -14,16 +14,16 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "@types/node": "^8.0.17",
+    "@types/node": "^8.0.19",
     "clang-format": "^1.0.53",
+    "google-ts-style": "latest",
     "gulp": "^3.9.1",
     "gulp-sourcemaps": "^2.6.0",
     "gulp-tslint": "^8.1.1",
     "gulp-typescript": "^3.2.1",
     "merge2": "^1.1.0",
-    "typescript": "^2.4.1",
-    "google-ts-style": "latest",
-    "tslint": "^5.5.0"
+    "tslint": "^5.5.0",
+    "typescript": "^2.4.1"
   },
   "contributors": [
     {

setup.sh

@@ -0,0 +1,21 @@
+if [ -z $NODE_H2 ]; then
+  echo "\$NODE_H2 must point to a node binary"
+  exit 1
+fi
+if [ -z $NVM_DIR ]; then
+  echo "nvm must be installed"
+  exit 1
+fi
+
+NVM_H2_DIR=$NVM_DIR/versions/node/v9.0.0-pre
+cp -r $NVM_DIR/versions/node/v8.2.1 $NVM_H2_DIR
+rm -r $NVM_H2_DIR/bin
+mkdir $NVM_H2_DIR/bin
+echo $NODE_H2 '--expose-http2 "$@"' > $NVM_H2_DIR/bin/node
+ln -s $NVM_H2_DIR/lib/node_modules/npm/bin/npm-cli.js $NVM_H2_DIR/bin/npm
+ln -s $NVM_H2_DIR/lib/node_modules/npm/bin/npx-cli.js $NVM_H2_DIR/bin/npx
+chmod +x $NVM_H2_DIR/bin/node
+
+[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"
+nvm use v9.0.0-pre 2>/dev/null
+nvm use --delete-prefix v9.0.0-pre