playwright/browser_patches/buildbots

Setting Up Build Bots

We currently have 5 build bots that produce 9 browser builds:

• buildbot-ubuntu-18.04
  • firefox-ubuntu-18.04.zip
  • webkit-ubuntu-18.04.zip
• buildbot-ubuntu-20.04
  • webkit-ubuntu-20.04.zip
• buildbot-mac-10.14
  • firefox-mac-10.14.zip
  • webkit-mac-10.14.zip
• buildbot-mac-10.15
  • webkit-mac-10.15.zip
• buildbot-windows
  • firefox-win32.zip
  • firefox-win64.zip
  • webkit-win64.zip

This document describes setting up bots infrastructure to produce browser builds.

Each bot configuration has 3 parts:

1. Setup toolchains to build browsers
2. Setup bot-specific environment required for bot operations

• azure-cli
• setting AZ_ACCOUNT_KEY, AZ_ACCOUNT_NAME, TELEGRAM_BOT_KEY env variables

3. Running relevant build script //browser_patches/buildbots/buildbot-*.sh using host scheduling system (cron on Linux, launchctl on Mac, polling on Win).

• Windows
  • Setting Up Browser Toolchains
  • Setting Bot Environment
  • Running Build Loop
• Mac
  • Setting Up Browser Toolchains
  • Setting Bot Environment
  • Running Build Loop
• Linux
  • Setting Up Browser Toolchains
  • Setting Bot Environment
  • Running Build Loop

Windows

Setting Up Browser Toolchains

We currently use MINGW environment that comes with Firefox to run our buildbot infrastructure on Windows. Browser toolchains:

• Firefox: Follow instructions on Building Firefox for Windows. Get the checkout with mercurial and run "./mach bootstrap" from mercurial root.
• WebKit: mostly follow instructions on Building WebKit For Windows. Use chocolatey to install dependencies; we don't use clang to compile webkit on windows. (NOTE: we didn't need to install pywin32 with pip and just skipped that step).
• Our WebKit port requires libvpx. Install vcpkg and build libvpx from source. Run the following commands in Windows Terminal as Administrator(required for bootstrap-vcpkg.bat).

cd c:\
git clone https://github.com/microsoft/vcpkg.git
cd vcpkg
.\bootstrap-vcpkg.bat
.\vcpkg.exe install libvpx --triplet x64-windows

If you install vcpkg in a different location, cmake files should be pointed to the new location (see -DLIBVPX_PACKAGE_PATH parameter in buildwin.bat).

After this step, you should:

• have c:\mozilla-build folder and c:\mozilla-source folder with firefox checkout.
• being able to build webkit-cairo from cmd.exe.

Setting Bot Environment

1. Install azure-cli

Install azure-cli for windows using MS Installer

2. Export "az" to the mingw world

The easiest away to export "az" to mingw is to create c:\mozilla-build\bin\az with the following content:

cmd.exe /c "\"C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\wbin\az.cmd\" $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14} ${15} ${16}"

3. Install node.js

Node.js: https://nodejs.org/en/download/

4. Set custom env variables to mingw env

Edit c:\mozilla-build\start-shell.bat and add the following lines in the beginning:

SET AZ_ACCOUNT_NAME=<account-name>
SET AZ_ACCOUNT_KEY=<account-key>
SET TELEGRAM_BOT_KEY=<bot_key>
SET WEBKIT_BUILD_PATH=<value of "PATH" variable from cmd.exe>
SET DEVENV="C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\devenv.com"

NOTE: mind different quotes position in DEVENV="..." than in PATH (and WEBKIT_BUILD_PATH). This is important.

And right before the REM Start shell., change PATH to export locally-installed node.js:

SET "PATH=C:\Program Files\nodejs\;%PATH%"

Remarks:

• the WEBKIT_BUILD_PATH value is the value of PATH variable. To get the value, run cmd.exe and run PATH command.
• the DEVENV variable should point to VS2019 devenv executable.
• change <account-name> and <account-key> with relevant keys/names.

NOTE: No spaces or quotes are allowed here!

5. Disable git autocrlf and enable longpaths

Run c:\mozilla-build\start-shell.bat and run:

• git config --global core.autocrlf false
• git config --global core.longpaths true

The core.longpaths is needed for webkit since it has some very long layout paths.

NOTE: If git config fails, run shell as administrator!

6. Checkout Playwright to /c/

Run c:\mozilla-build\start-shell.bat and checkout Playwright repo to /c/playwright.

7. Create a c:\WEBKIT_WIN64_LIBS\ directory with win64 dlls

Create a new c:\WEBKIT_WIN64_LIBS folder and copy the following libraries from C:\Windows\System32 into it:

• msvcp140.dll
• msvcp140_2.dll
• vcruntime140.dll
• vcruntime140_1.dll

Note

: these libraries are expected by //browser_patches/webkit/archive.sh.

This is necessary since mingw is a 32-bit application and cannot access the C:\Windows\System32 folder due to Windows FileSystem Redirector. (StackOverflow question)

Running Build Loop

1. Launch c:\mozilla-build/start-shell.bat
2. Run /c/playwright/browser_patches/buildbots/buildbot-windows.sh
3. Disable "QuickEdit" terminal mode to avoid terminal freezing and postponing builds

Mac

Setting Up Browser Toolchains

1. Install XCode from AppStore
2. Run XCode once and install components, if it requires any.
3. Install XCode command-line tools: xcode-select --install
4. Install homebrew: https://brew.sh/

Mac 10.14 builds both firefox and webkit, whereas we only build webkit on mac 10.15. Browser Toolchains:

• Building Firefox On Mac
• Building WebKit On Mac (though as of Dec, 2019 it does not require any additional steps)

Setting Bot Environment

1. Install azure-cli
2. Clone https://github.com/microsoft/playwright
3. Run //browser_patches/prepare_checkout.sh for every browser you care about
4. Make sure //browser_patches/{webkit,firefox}/build.sh works and compiles browsers

Running Build Loop

We use launchctl on Mac instead of cron since launchctl lets us run daemons even for non-logged-in users.

Create a /Library/LaunchDaemons/dev.playwright.plist with the contents below (will require sudo access). Make sure to change the following fields:

1. Set values for all keys in the EnvironmentVariables dict.
2. Put a proper path to the Program
3. Make sure to put correct UserName

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>dev.playwright</string>

    <key>Program</key>
    <string>/Users/aslushnikov/prog/cron/playwright/browser_patches/buildbots/buildbot-mac-10.14.sh</string>

    <key>UserName</key>
    <string>aslushnikov</string>

    <key>EnvironmentVariables</key>
    <dict>
      <key>PATH</key>
      <string>/usr/bin:/usr/sbin</string>

      <key>TELEGRAM_BOT_KEY</key>
      <string></string>

      <key>AZ_ACCOUNT_NAME</key>
      <string></string>

      <key>AZ_ACCOUNT_KEY</key>
      <string></string>

      <key>MOZ_NOSPAM</key>
      <string>1</string>
    </dict>


    <key>StandardOutPath</key>
    <string>/tmp/launchctl-playwright-buildbot.log</string>

    <key>StandardErrorPath</key>
    <string>/tmp/launchctl-playwright-buildbot.errorlog</string>

    <key>StartInterval</key>
    <integer>300</integer>
  </dict>
</plist>

Next, you can either use launchctl load command to load the daemon, or reboot bot to make sure it auto-starts.

Note

: mozbuild uses terminal-notifier which hangs in launchctl environment. The MOZ_NOSPAM env variable disables terminal notifications.

Finally, MacBooks tend to go to sleep no matter what their "energy settings" are. To disable sleep permanently on Macs (source):

sudo pmset -a sleep 0; sudo pmset -a hibernatemode 0; sudo pmset -a disablesleep 1;

Linux

Setting Up Browser Toolchains

1. Note: firefox binaries will crash randomly if compiled with clang 6. They do work when compiled with clang 9. To install clang 9 on ubuntu and make it default:

$ sudo apt-get install clang-9
$ sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-9 100
$ sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-9 100

Note

: Firefox build config can be checked official Firefox builds, navigating to about:buildconfig URL.

To document precisely my steps to bring up bots:

• July 22, 2020: Setting up Ubuntu 18.04 buildbot on Azure
• July 22, 2020: Setting up Ubuntu 20.04 buildbot on Azure