Plugins
How to write plugins for gqlgen
[edit]
master
branch. The latest version is v0.17.59.
Plugins provide a way to hook into the gqlgen code generation lifecycle. In order to use anything other than the default plugins you will need to create your own entrypoint:
To use a plugin during code generation, you need to create a new entry point. Create generate.go
in the same folder as resolver.go
with the following code:
// go:build ignore
package main
import (
"flag"
"fmt"
"io"
"log"
"os"
"time"
"github.com/99designs/gqlgen/api"
"github.com/99designs/gqlgen/codegen/config"
"github.com/99designs/gqlgen/plugin/stubgen"
)
func main() {
cfg, err := config.LoadConfigFromDefaultLocations()
if err != nil {
fmt.Fprintln(os.Stderr, "failed to load config", err.Error())
os.Exit(2)
}
err = api.Generate(cfg,
api.AddPlugin(yourplugin.New()), // This is the magic line
)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(3)
}
}
In resolver.go
, add //go:generate go run generate.go
. Now you can run go generate ./...
instead of go run github.com/99designs/gqlgen generate
to generate the code.
There are currently only two hooks:
Take a look at plugin.go for the full list of available hooks. These are likely to change with each release.