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CONTRIBUTING.md

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Contributing to graph-node

Welcome to the Graph Protocol! Thanks a ton for your interest in contributing.

If you run into any problems feel free to create an issue. PRs are much appreciated for simple things. Here's a list of good first issues. If it's something more complex we'd appreciate having a quick chat in GitHub Issues or Discord.

Join the conversation on our Discord.

Please follow the Code of Conduct for all the communications and at events. Thank you!

Development flow

Install development helpers:

cargo install cargo-watch
rustup component add rustfmt-preview

Set environment variables:

# Only required when testing the Diesel/Postgres store
export THEGRAPH_STORE_POSTGRES_DIESEL_URL=<Postgres database URL>

While developing, a useful command to run in the background is this:

cargo watch                       \
    -x "fmt --all"                 \
    -x check                      \
    -x "test -- --test-threads=1" \
    -x "doc --no-deps"

This will watch your source directory and continuously do the following on changes:

  1. Build all packages in the workspace target/.
  2. Generate docs for all packages in the workspace in target/doc/.
  3. Automatically format all your source files.

Commit messages

We use the following format for commit messages: {crate-name}: {Brief description of changes}, for example: store: Support 'Or' filters.

If multiple crates are being changed list them all like this: core, graphql, mock, runtime, postgres-diesel: Add event source to store