Docs.rs (formerly cratesfyi) is an open source project to host documentation of crates for the Rust Programming Language.
Docs.rs automatically builds crates' documentation released on crates.io using the nightly release of the Rust compiler.
This readme is for developing docs.rs. See the about page for user-facing documentation.
Changing the build environment
The recommended way to develop docs.rs is a combination of
cargo run for
the main binary and docker-compose for the external services.
This gives you reasonable incremental build times without having to add new users and packages to your host machine.
For ease of use,
git_hooks directory contains useful
git hooks to make your development easier.
# Unix cd .git/hooks && ln -s ../../.git_hooks/* . && cd ../.. # Powershell cd .git/hooks && New-Item -Path ../../.git_hooks/* -ItemType SymbolicLink -Value . && cd ../..
Docs.rs requires at least the following native C dependencies.
There may be other dependencies that have not been documented.
Make sure you have docker-compose and are able to download ~10GB data on the first run. Also ensure that docker is installed and the service is running.
git clone https://github.com/rust-lang/docs.rs.git docs.rs cd docs.rs # Configure the default settings for external services cp .env.sample .env # Create the DOCSRS_PREFIX directory mkdir -p ignored/cratesfyi-prefix/crates.io-index # Builds the docs.rs binary cargo build # Start the external services docker-compose up -d db s3 # Setup the database you just created cargo run -- database migrate # Build a sample crate to make sure it works # This also sets up the docs.rs build environment. # This will take a while the first time but will be cached afterwards. cargo run -- build crate regex 1.3.1 # Generate important files for the web navigation cargo run -- build add-essential-files # This starts the web server but does not build any crates. # It does not automatically run the migrations, so you need to do that manually (see above). cargo run -- start-web-server # If you want the server to automatically reload templates if they are modified: cargo run -- start-web-server --reload-templates
If you need to store big files in the repository's directory it's recommended to
put them in the
ignored/ subdirectory, which is ignored both by git and
Running the database and S3 server outside of docker-compose is possible, but not recommended or supported. Note that you will need docker installed no matter what, since it's used for Rustwide sandboxing.
If you have trouble with the above commands, consider using
docker-compose up --build,
which uses docker-compose for the web server as well.
This will not cache dependencies - in particular, you'll have to rebuild all 400 whenever the lockfile changes -
but makes sure that you're in a known environment so you should have fewer problems getting started.
You can also use the
web container to run builds on systems which don't support running builds directly (mostly on Mac OS or Windows):
# run a build for a single crate docker-compose run web build crate regex 1.3.1 # or build essential files docker-compose run web build add-essential-files # rebuild the web container when you changed code. docker-comose build web
Note that running tests is not supported when using pure docker-compose.
Please file bugs for any trouble you have running docs.rs!
The services started by Docker-Compose are defined in docker-compose.yml. Three services are defined:
|web||http://localhost:3000||N/A||A container running the docs.rs binary|
|db||postgresql://cratesfyi:password@localhost:15432||-||Postgres database used by web|
||MinIO (simulates AWS S3) used by web|
To rebuild the site, run
Note that docker-compose caches the build even if you change the source code,
so this will be necessary anytime you make changes.
If you want to completely clean up the database, don't forget to remove the volumes too:
$ docker-compose down --volumes
I see the error
standard_init_linux.go:211: exec user process caused "no such file or directory" when I use docker-compose.
You probably have CRLF line endings.
This causes the hashbang in the docker-entrypoint to be
/bin/sh\r instead of
This is probably because you have
git.autocrlf set to true,
set it to
I see the error
/opt/rustwide/cargo-home/bin/cargo: cannot execute binary file: Exec format error when running builds.
You are most likely not on a Linux platform. Running builds directly is only supported on
x86_64-unknown-linux-gnu. On other platforms you can use the
docker-compose run web build [...] workaround described above.
See rustwide#41 for more details about supporting more platforms directly.
All tests are failing or timing out
Our test setup needs a certain about of file descriptors.
At least 4096 should be enough, you can set it via:
$ ulimit -n 4096
cargo run -- --help for a full list of commands.
Starting the web server
# This command will start web interface of docs.rs on http://localhost:3000 cargo run -- start-web-server
# Builds <CRATE_NAME> <CRATE_VERSION> and adds it into database # This is the main command to build and add a documentation into docs.rs. # For example, `docker-compose run web build crate regex 1.1.6` cargo run -- build crate <CRATE_NAME> <CRATE_VERSION> # alternatively, via the web container docker-compose run web build crate <CRATE_NAME> <CRATE_VERSION> # Builds every crate on crates.io and adds them into database # (beware: this may take months to finish) cargo run -- build world # Builds a local package you have at <SOURCE> and adds it to the database. # The package does not have to be on crates.io. # The package must be on the local filesystem, git urls are not allowed. cargo run -- build crate --local /path/to/source
# Adds a directory into database to serve with `staticfile` crate. cargo run -- database add-directory <DIRECTORY> [PREFIX] # Updates repository stats for crates. # You need to set the DOCSRS_GITHUB_ACCESSTOKEN # environment variable in order to run this command. # Set DOCSRS_GITLAB_ACCESSTOKEN to raise the rate limit for GitLab repositories, # or leave it blank to fetch repositories at a slower rate. cargo run -- database update-repository-fields
If you want to explore or edit database manually, you can connect to the database
. .env psql $DOCSRS_DATABASE_URL
The database contains a blacklist of crates that should not be built.
# List the crates on the blacklist cargo run -- database blacklist list # Adds <CRATE_NAME> to the blacklist cargo run -- database blacklist add <CRATE_NAME> # Removes <CRATE_NAME> from the blacklist cargo run -- database blacklist remove <CRATE_NAME>
If you want to revert to a precise migration, you can run:
cargo run -- database migrate <migration number>
# Run a persistent daemon which queues builds and starts a web server. cargo run -- daemon --registry-watcher=disabled # Add crates to the queue cargo run -- queue add <CRATE> <VERSION>
Updating vendored sources
When updating Font Awesome, make sure to change
scss/_variables.scss (it should be at the top of the file) to
../-/static. This will point font awesome at the correct path from which to request font and icon resources.