Servo is a prototype web browser engine written in the Rust language. It is currently developed on 64-bit macOS, 64-bit Linux, 64-bit Windows, and Android.
Servo welcomes contribution from everyone. See
CONTRIBUTING.md
and HACKING_QUICKSTART.md
for help getting started.
Visit the Servo Project page for news and guides.
Building servo requires rustup, version 1.8.0 or more recent.
If you have an older version, run rustup self update
.
To install on Windows, download and run rustup-init.exe
then follow the onscreen instructions.
To install on other systems, run:
curl https://sh.rustup.rs -sSf | sh
This will also download the current stable version of Rust, which Servo won’t use. To skip that step, run instead:
curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain none
See also Other installation methods
Please select your operating system:
Xcode version 10.2 or above is recommended.
brew bundle install --file=etc/taskcluster/macos/Brewfile
brew bundle install --file=etc/taskcluster/macos/Brewfile-build
pip install virtualenv
sudo apt install python-virtualenv python-pip
./mach bootstrap
If ./mach bootstrap
doesn't work, file a bug, and, run the commands below:
sudo apt install git curl autoconf libx11-dev libfreetype6-dev libgl1-mesa-dri \
libglib2.0-dev xorg-dev gperf g++ build-essential cmake libssl-dev \
liblzma-dev libxmu6 libxmu-dev \
libgles2-mesa-dev libegl1-mesa-dev libdbus-1-dev libharfbuzz-dev ccache \
clang libunwind-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
libgstreamer-plugins-bad1.0-dev autoconf2.13 llvm-dev
Additionally, you'll need a local copy of GStreamer with a version later than 12.0. You can place it in support/linux/gstreamer/gst
, or run ./mach bootstrap-gstreamer
to set it up.
If you are using Ubuntu 16.04 or Linux Mint 18.* run export HARFBUZZ_SYS_NO_PKG_CONFIG=1
before building to avoid an error with harfbuzz.
If you get an undefined symbol error on gst_player_get_config
try removing gir1.2-gst-plugins-bad-1.0
and all old versions of clang, see #22016
sudo dnf install python3 python3-virtualenv python3-pip
python3 ./mach bootstrap
If python3 ./mach bootstrap
doesn't work, file a bug, and, run the commands below:
sudo dnf install curl libtool gcc-c++ libXi-devel libunwind-devel \
freetype-devel mesa-libGL-devel mesa-libEGL-devel glib2-devel libX11-devel \
libXrandr-devel gperf fontconfig-devel cabextract ttmkfdir expat-devel \
rpm-build openssl-devel cmake libX11-devel libXcursor-devel \
libXmu-devel dbus-devel ncurses-devel harfbuzz-devel \
ccache clang clang-libs python3-devel gstreamer1-devel \
gstreamer1-plugins-base-devel gstreamer1-plugins-bad-free-devel autoconf213
sudo yum install python-virtualenv python-pip
./mach bootstrap
If ./mach bootstrap
doesn't work, file a bug, and, run the commands below:
sudo yum install curl libtool gcc-c++ libXi-devel freetype-devel \
mesa-libGL-devel mesa-libEGL-devel glib2-devel libX11-devel libXrandr-devel \
gperf fontconfig-devel cabextract ttmkfdir python expat-devel rpm-build \
openssl-devel cmake3 libXcursor-devel libXmu-devel \
dbus-devel ncurses-devel python34 harfbuzz-devel \
ccache clang clang-libs llvm-toolset-7
Build inside llvm-toolset
and devtoolset
:
scl enable devtoolset-7 llvm-toolset-7 bash
with the following environmental variables set:
export CMAKE=cmake3
export LIBCLANG_PATH=/opt/rh/llvm-toolset-7/root/usr/lib64
sudo zypper install libX11-devel libexpat-devel Mesa-libEGL-devel Mesa-libGL-devel cabextract cmake \
dbus-1-devel fontconfig-devel freetype-devel gcc-c++ git glib2-devel gperf \
harfbuzz-devel libXcursor-devel libXi-devel libXmu-devel libXrandr-devel libopenssl-devel \
python-pip python-virtualenv rpm-build ccache llvm-clang libclang autoconf213 gstreamer-devel \
gstreamer-plugins-base-devel gstreamer-plugins-bad-devel
sudo pacman -S --needed base-devel git python2 python2-virtualenv python2-pip mesa cmake libxmu \
pkg-config ttf-fira-sans harfbuzz ccache llvm clang autoconf2.13 gstreamer gstreamer-vaapi
sudo emerge net-misc/curl \
media-libs/freetype media-libs/mesa dev-util/gperf \
dev-python/virtualenv dev-python/pip dev-libs/openssl \
media-libs/harfbuzz dev-util/ccache sys-libs/libunwind \
x11-libs/libXmu x11-base/xorg-server sys-devel/clang \
media-libs/gstreamer media-libs/gst-plugins-bad media-libs/gst-plugins-base
With the following environment variable set:
export LIBCLANG_PATH=$(llvm-config --prefix)/lib64
- Install Python 2.7 for Windows (https://www.python.org/downloads/release/python-2716/). The Windows x86-64 MSI installer is fine. This is required for the build system execution and many dependencies.
You should change the installation to install the "Add python.exe to Path" feature.
You will also need to set the PYTHON2
environment variable, e.g., to 'C:\Python27\python.exe' by doing:
setx PYTHON2 "C:\Python27\python.exe" /m
- Install Python 3.7 for Windows (https://www.python.org/downloads/release/python-374/). The Windows x86-64 MSI installer is fine. This is required in order to build the JavaScript engine, SpiderMonkey.
You will also need to set the PYTHON3
environment variable, e.g., to 'C:\Python37\python.exe' by doing:
setx PYTHON3 "C:\Python37\python.exe" /m
The /m
will set it system-wide for all future command windows.
- Install virtualenv.
In a normal Windows Shell (cmd.exe or "Command Prompt" from the start menu), do:
pip install virtualenv
If this does not work, you may need to reboot for the changed PATH settings (by the python installer) to take effect.
- Install the most recent GStreamer MSVC packages. You need to download the two
.msi
files for your platform from the GStreamer website and install them. The currently recommended version is 1.16.0. i.e.:
Note that the MinGW binaries will not work, so make sure that you install the MSVC the ones.
Note that you should ensure that all components are installed from gstreamer, as we require many of the optional libraries that are not installed by default.
-
Install Git for Windows (https://git-scm.com/download/win). DO allow it to add git.exe to the PATH (default settings for the installer are fine).
-
Install Visual Studio Community 2017 (https://www.visualstudio.com/vs/community/). You MUST add "Visual C++" to the list of installed components as well as the "Windows Universal C runtime." They are not on by default. Visual Studio 2017 MUST installed to the default location or mach.bat will not find it.
Note that version is hard to download online and is easier to install via Chocolatey with:
choco install -y visualstudio2017community --package-parameters="'--add Microsoft.VisualStudio.Component.Git'"
Update-SessionEnvironment #refreshing env due to Git install
#--- UWP Workload and installing Windows Template Studio ---
choco install -y visualstudio2017-workload-nativedesktop
You may experience much faster builds on Windows by following these steps. (Related Rust issue: rust-lang/rust#37543)
- Download the latest version of LLVM (https://releases.llvm.org/).
- Run the installer and choose to add LLVM to the system PATH.
- Add the following to your Cargo config (Found at
%USERPROFILE%\.cargo\config
). You may need to change the triple to match your environment.
[target.x86_64-pc-windows-msvc]
linker = "lld-link.exe"
If you encountered errors with the environment above, do the following for a workaround:
- Download and install Build Tools for Visual Studio 2017
- Install
python2.7 x86-x64
andvirtualenv
- Run
mach.bat build -d
.
If you have troubles with
x64 type
prompt asmach.bat
set by default:
- You may need to choose and launch the type manually, such as
x86_x64 Cross Tools Command Prompt for VS 2017
in the Windows menu.)cd to/the/path/servo
python mach build -d
If you got the error
Cannot run mach in a path on a case-sensitive file system on Windows
:
- Open Command Prompt or PowerShell as administrator.
- Disable case-sensitive for servo path,
fsutil.exe file SetCaseSensitiveInfo X:\path\to\servo disable
If you got the error
DLL file
api-ms-win-crt-runtime-l1-1-0.dllnot found!
then set theWindowsSdkDir
environment variable to an appropriateWindows Kit
directory containingRedist\ucrt\DLLs\x64\api-ms-win-crt-runtime-l1-1-0.dll
, for exampleC:\Program Files (x86)\Windows Kits\10
.
If you get the error
thread 'main' panicked at 'Unable to find libclang: "couldn\'t find any valid shared libraries matching: [\'clang.dll\', \'libclang.dll\'], set the
LIBCLANG_PATHenvironment variable to a path where one of these files can be found (invalid: ... invalid DLL (64-bit))])"'
thenrustup
may have installed the 32-bit default target rather than the 64-bit one. You can find the configuration withrustup show
, and set the default withrustup set default-host x86_64-pc-windows-msvc
.
Run ./mach bootstrap-android --build
to get Android-specific tools. See wiki for
details.
Servo's build system uses rustup.rs to automatically download a Rust compiler.
This is a specific version of Rust Nightly determined by the
rust-toolchain
file.
Servo is built with Cargo, the Rust package manager. We also use Mozilla's Mach tools to orchestrate the build and other tasks.
To build Servo in development mode. This is useful for development, but the resulting binary is very slow.
git clone https://github.com/servo/servo
cd servo
./mach build --dev
./mach run tests/html/about-mozilla.html
Or on Windows MSVC, in a normal Command Prompt (cmd.exe):
git clone https://github.com/servo/servo
cd servo
mach.bat build --dev
For benchmarking, performance testing, or
real-world use, add the --release
flag to create an optimized build:
./mach build --release
./mach run --release tests/html/about-mozilla.html
Note: mach build
will build both servo
and libsimpleservo
. To make compilation a bit faster, it's possible to only compile the servo binary: ./mach build --dev -p servo
.
If you’re making changes to one crate that cause build errors in another crate, consider this instead of a full build:
./mach check
It will run cargo check
, which runs the analysis phase of the compiler
(and so shows build errors if any) but skips the code generation phase.
This can be a lot faster than a full build,
though of course it doesn’t produce a binary you can run.
For ARM (armv7-linux-androideabi
, most phones):
./mach build --release --android
./mach package --release --android
For x86 (typically for the emulator):
./mach build --release --target i686-linux-android
./mach package --release --target i686-linux-android
Run Servo with the command:
./servo [url] [arguments] # if you run with nightly build
./mach run [url] [arguments] # if you run with mach
# For example
./mach run https://www.google.com
-p INTERVAL
turns on the profiler and dumps info to the console everyINTERVAL
seconds-s SIZE
sets the tile size for painting; defaults to 512-z
disables all graphical output; useful for running JS / layout tests-Z help
displays useful output to debug servo
Ctrl
+L
opens URL prompt (Cmd
+L
on Mac)Ctrl
+R
reloads current page (Cmd
+R
on Mac)Ctrl
+-
zooms out (Cmd
+-
on Mac)Ctrl
+=
zooms in (Cmd
+=
on Mac)Alt
+left arrow
goes backwards in the history (Cmd
+left arrow
on Mac)Alt
+right arrow
goes forwards in the history (Cmd
+right arrow
on Mac)Esc
orCtrl
+Q
exits Servo (Cmd
+Q
on Mac)
There are lots of mach commands you can use. You can list them with ./mach --help
.
The generated documentation can be found on https://doc.servo.org/servo/index.html