graphql-schema-picker

A CLI for selectively pruning your GraphQL schemas.

The CLI accepts a Schema Definition Language file, and then selectively picks (or filters out) certain elements.

Motivation

This tool was born out of a desire to reuse Hasura's schema in upstream microservices. In my case, it meant discarding the tens of thousands of lines in the schema that was introspected from Hasura, and really only paying attention to the few types I cared about.

Example

For a realistic example of what a Hasura GraphQL schema looks like, check out our example SDL file (Schema Definition Language).

Getting Started

Installing

Eventually, I may package this up in Tea and maybe even Homebrew (via Goreleaser).

With go install

go install github.com/kevinmichaelchen/graphql-schema-picker@latest

With Docker

docker pull ghcr.io/kevinmichaelchen/graphql-schema-picker
docker run --rm ghcr.io/kevinmichaelchen/graphql-schema-picker --help

docker run --rm \
  -v $(pwd)/examples:/examples \
  ghcr.io/kevinmichaelchen/graphql-schema-picker \
    --debug \
    pick \
      --output /examples/pruned.sdl.graphqls \
      --sdl-file /examples/hasura.sdl.graphqls \
      --definitions Aircrafts

Similar Tools

• https://github.com/n1ru4l/graphql-public-schema-filter
• https://github.com/kesne/graphql-schema-subset
• https://github.com/xometry/graphql-code-generator-subset-plugin
• https://the-guild.dev/graphql/tools/docs/api/classes/wrap_src.pruneschema
• https://pothos-graphql.dev/docs/plugins/sub-graph

Contributing

Building

go run cmd/graphql-schema-picker/main.go \
  --debug \
  pick \
    --output examples/pruned.sdl.graphqls \
    --sdl-file examples/hasura.sdl.graphqls \
    --definitions Aircrafts

Releasing

Create tags with xc tag and push them with git push --tags.

Tasks

build

Builds the Go program into a local binary.

goreleaser build --clean --single-target

tag

Create a new Git tag

sh <(curl https://tea.xyz) +github.com/caarlos0/svu \
  git tag -a $(svu next) -m "$(svu next)"