Community Involvement

Join our community on or other Locations.

Simply building Cayley

If your version of Go < 1.13, you need to run:
export GO111MODULE=on
Follow the instructions for running Cayley locally:
# clone project
git clone
cd cayley
# Download dependencies
go mod download
# Download web files (optional)
go run cmd/download_ui/download_ui.go
# Install packr 2
go get -u

Generate static files go modules


build the binary

go build ./cmd/cayley

try the generated binary

./cayley help
Give it a quick test with:
./cayley repl -i data/testdata.nq
To run the web frontend, replace the "repl" command with "http"
./cayley http -i data/testdata.nq
You can now open the WebUI in your browser:

Hacking on Cayley

First, you'll need Go (version 1.11.x or greater) and a Go workspace. This is outlined by the Go team at and is sort of the official way of going about it.
If your version of Go < 1.13, you need to run:
export GO111MODULE=on
If you just want to build Cayley and check out the source, or use it as a library, a simple go get will work!
But suppose you want to contribute back on your own fork (and pull requests are welcome!). A good way to do this is to set up your $GOPATH and then...
mkdir -p $GOPATH/src/
cd $GOPATH/src/
git clone$GITHUBUSERNAME/cayley
...where $GITHUBUSERNAME is, well, your GitHub username :) You'll probably want to add
cd cayley
git remote add upstream
So that you can keep up with the latest changes by periodically running
git pull --rebase upstream
With that in place, that folder will reflect your local fork, be able to take changes from the official fork, and build in the Go style.
For iterating, it can be helpful to, from the directory, run
packr2 && go build ./cmd/cayley && ./cayley <subcommand> <your options>
Which will also resolve the relevant static content paths for serving HTTP.
Reminder: add yourself to CONTRIBUTORS and AUTHORS.

Running Unit Tests

If your version of Go < 1.13, you need to run:
export GO111MODULE=on
First, cd into the cayley project folder and run:
packr && go test ./...
If you have a Docker installed, you can also run tests for remote backend implementations:
go test -tags docker ./...
If you have a Docker installed, you only want to run tests for a specific backend implementations eg. mongodb
go test -tags docker ./graph/nosql/mongo
Integration tests can be enabled with environment variable:
RUN_INTEGRATION=true go test ./...