fix: set revision based on PUPPETEER_PRODUCT

.travis.yml

@@ -20,17 +20,17 @@ jobs:
       before_install:
         - "export DISPLAY=:99.0"
         - "sh -e /etc/init.d/xvfb start"
+        # populate .local-firefox for launcher tests
+        - PUPPETEER_PRODUCT=firefox npm install
       script: ./travis/chromium.sh
     - node_js: "10.19.0"
       dist: trusty
       env:
         - FIREFOX=true
-        - FIREFOX_HOME=$TRAVIS_HOME/firefox-latest
       before_install:
         - "export DISPLAY=:99.0"
         - "sh -e /etc/init.d/xvfb start"
-        - "pyenv shell 3.6 && pip3 install --user mozdownload"
-        - "rm -rf $FIREFOX_HOME && mozdownload -t daily -d $FIREFOX_HOME/latest.tar.bz --log-level DEBUG"
-        - "cd $FIREFOX_HOME; tar -xvf latest.tar.bz; cd -; ls $FIREFOX_HOME/firefox/firefox"
+        # install step will add .local-chromium for launcher tests
+        - PUPPETEER_PRODUCT=firefox npm install
       script:
-        -  "BINARY=$FIREFOX_HOME/firefox/firefox npm run funit"
+        -  "npm run funit"

index.js

@@ -29,10 +29,14 @@ Page.prototype.emulateMedia = Page.prototype.emulateMediaType;
 // If node does not support async await, use the compiled version.
 const Puppeteer = require('./lib/Puppeteer');
 const packageJson = require('./package.json');
-const preferredRevision = packageJson.puppeteer.chromium_revision;
+let preferredRevision = packageJson.puppeteer.chromium_revision;
 const isPuppeteerCore = packageJson.name === 'puppeteer-core';
+// puppeteer-core ignores environment variables
+const product = isPuppeteerCore ? undefined : process.env.PUPPETEER_PRODUCT || process.env.npm_config_puppeteer_product || process.env.npm_package_config_puppeteer_product;
+if (!isPuppeteerCore && product === 'firefox')
+  preferredRevision = packageJson.puppeteer.firefox_revision;
 
-const puppeteer = new Puppeteer(__dirname, preferredRevision, isPuppeteerCore);
+const puppeteer = new Puppeteer(__dirname, preferredRevision, isPuppeteerCore, product);
 
 // The introspection in `Helper.installAsyncStackHooks` references `Puppeteer._launcher`
 // before the Puppeteer ctor is called, such that an invalid Launcher is selected at import,

src/Launcher.js

@@ -411,14 +411,7 @@ class FirefoxLauncher {
       firefoxArguments.push(temporaryUserDataDir);
     }
 
-    // replace 'latest' placeholder with actual downloaded revision
-    if (this._preferredRevision === 'latest') {
-      const browserFetcher = new BrowserFetcher(this._projectRoot, {product: this.product});
-      const localRevisions = await browserFetcher.localRevisions();
-      if (localRevisions[0])
-        this._preferredRevision = localRevisions[0];
-    }
-
+    await this._updateRevision();
     let firefoxExecutable = executablePath;
     if (!executablePath) {
       const {missingText, executablePath} = resolveExecutablePath(this);
@@ -480,6 +473,16 @@ class FirefoxLauncher {
     return resolveExecutablePath(this).executablePath;
   }
 
+  async _updateRevision() {
+    // replace 'latest' placeholder with actual downloaded revision
+    if (this._preferredRevision === 'latest') {
+      const browserFetcher = new BrowserFetcher(this._projectRoot, { product: this.product });
+      const localRevisions = await browserFetcher.localRevisions();
+      if (localRevisions[0])
+        this._preferredRevision = localRevisions[0];
+    }
+  }
+
   /**
    * @return {string}
    */

src/Puppeteer.js

@@ -23,19 +23,23 @@ module.exports = class {
    * @param {string} projectRoot
    * @param {string} preferredRevision
    * @param {boolean} isPuppeteerCore
+   * @param {string} productName
    */
-  constructor(projectRoot, preferredRevision, isPuppeteerCore) {
+  constructor(projectRoot, preferredRevision, isPuppeteerCore, productName) {
     this._projectRoot = projectRoot;
     this._preferredRevision = preferredRevision;
     this._isPuppeteerCore = isPuppeteerCore;
+    // track changes to Launcher configuration via options or environment variables
+    this.__productName = productName;
   }
 
   /**
    * @param {!(Launcher.LaunchOptions & Launcher.ChromeArgOptions & Launcher.BrowserOptions & {product?: string, extraPrefsFirefox?: !object})=} options
    * @return {!Promise<!Puppeteer.Browser>}
    */
   launch(options = {}) {
-    this._productName = options.product;
+    if (options.product)
+      this._productName = options.product;
     return this._launcher.launch(options);
   }
 
@@ -44,15 +48,17 @@ module.exports = class {
    * @return {!Promise<!Puppeteer.Browser>}
    */
   connect(options) {
-    this._productName = options.product;
+    if (options.product)
+      this._productName = options.product;
     return this._launcher.connect(options);
   }
 
   /**
    * @param {string} name
    */
   set _productName(name) {
-    this._changedProduct = this.__productName !== name;
+    if (this.__productName !== name)
+      this._changedProduct = true;
     this.__productName = name;
   }
 

test/launcher.spec.js

@@ -353,6 +353,35 @@ describe('Launcher specs', function() {
         await browser.close();
       });
     });
+    describe('Puppeteer.launch', function() {
+      let productName;
+
+      before(async() => {
+        const {puppeteer} = getTestState();
+        productName = puppeteer._productName;
+      });
+
+      after(async() => {
+        const {puppeteer} = getTestState();
+        puppeteer._lazyLauncher = undefined;
+        puppeteer._productName = productName;
+      });
+
+      it('should be able to launch different products', async() => {
+        const {puppeteer} = getTestState();
+
+        const products = ['firefox', 'chrome'];
+        for (const product of products) {
+          const browser = await puppeteer.launch({product});
+          const userAgent = await browser.userAgent();
+          await browser.close();
+          if (product === 'chrome')
+            expect(userAgent).toContain('Chrome');
+          else
+            expect(userAgent).toContain('Firefox');
+        }
+      });
+    });
     describe('Puppeteer.connect', function() {
       it('should be able to connect multiple times to the same browser', async() => {
         const { puppeteer, defaultBrowserOptions} = getTestState();

test/mocha-utils.js

@@ -59,14 +59,18 @@ const defaultBrowserOptions = {
   dumpio: !!process.env.DUMPIO,
 };
 
+(async() => {
+  if (defaultBrowserOptions.executablePath) {
+    console.warn(`WARN: running ${product} tests with ${defaultBrowserOptions.executablePath}`);
+  } else {
+    if (product === 'firefox')
+      await puppeteer._launcher._updateRevision();
+    const executablePath = puppeteer.executablePath();
+    if (!fs.existsSync(executablePath))
+      throw new Error(`Browser is not downloaded at ${executablePath}. Run 'npm install' and try to re-run tests`);
+  }
+})();
 
-if (defaultBrowserOptions.executablePath) {
-  console.warn(`WARN: running ${product} tests with ${defaultBrowserOptions.executablePath}`);
-} else {
-  const executablePath = puppeteer.executablePath();
-  if (!fs.existsSync(executablePath))
-    throw new Error(`Browser is not downloaded at ${executablePath}. Run 'npm install' and try to re-run tests`);
-}
 
 const setupGoldenAssertions = () => {
   const suffix = product.toLowerCase();