make gqlgenc recognize Apollo Federation related directives

README.md

@@ -42,6 +42,8 @@ models:
     model: github.com/99designs/gqlgen/graphql.Int64
   Date:
     model: github.com/99designs/gqlgen/graphql.Time
+federation: # Add this if your schema includes Apollo Federation related directives
+  version: 2
 endpoint:
   url: https://api.annict.com/graphql # Where do you want to send your request?
   headers: # If you need header for getting introspection query, set it
@@ -67,6 +69,8 @@ models:
     model: github.com/99designs/gqlgen/graphql.Int64
   Date:
     model: github.com/99designs/gqlgen/graphql.Time
+federation: # Add this if your schema includes Apollo Federation related directives
+  version: 2
 schema:
   - "schema/**/*.graphql" # Where are all the schema files located?
 query:

config/config.go

@@ -24,6 +24,7 @@ type Config struct {
 	SchemaFilename StringList           `yaml:"schema,omitempty"`
 	Model          config.PackageConfig `yaml:"model,omitempty"`
 	Client         config.PackageConfig `yaml:"client,omitempty"`
+	Federation     config.PackageConfig `yaml:"federation,omitempty"`
 	Models         config.TypeMap       `yaml:"models,omitempty"`
 	Endpoint       *EndPointConfig      `yaml:"endpoint,omitempty"`
 	Generate       *GenerateConfig      `yaml:"generate,omitempty"`

generator/generator.go

@@ -2,11 +2,13 @@ package generator
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"sort"
 
 	"github.com/99designs/gqlgen/api"
 	"github.com/99designs/gqlgen/plugin"
+	"github.com/99designs/gqlgen/plugin/federation"
 	"github.com/99designs/gqlgen/plugin/modelgen"
 	"github.com/Yamashou/gqlgenc/config"
 )
@@ -50,6 +52,16 @@ func Generate(ctx context.Context, cfg *config.Config, option ...api.Option) err
 		o(cfg.GQLConfig, &plugins)
 	}
 
+	if cfg.Federation.Version != 0 {
+		if fed, ok := federation.New(cfg.Federation.Version).(plugin.EarlySourceInjector); ok {
+			if source := fed.InjectSourceEarly(); source != nil {
+				cfg.GQLConfig.Sources = append(cfg.GQLConfig.Sources, source)
+			}
+		} else {
+			return errors.New("failed to inject federation directives")
+		}
+	}
+
 	if err := cfg.LoadSchema(ctx); err != nil {
 		return fmt.Errorf("failed to load schema: %w", err)
 	}

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/stretchr/testify v1.8.4
 	github.com/urfave/cli/v2 v2.25.7
 	github.com/vektah/gqlparser/v2 v2.5.10
+	golang.org/x/text v0.13.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
@@ -21,7 +22,6 @@ require (
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/sys v0.12.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/tools v0.13.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -13,8 +13,6 @@ github.com/dgryski/trifles v0.0.0-20200323201526-dd97f9abfb48 h1:fRzb/w+pyskVMQ+
 github.com/dgryski/trifles v0.0.0-20200323201526-dd97f9abfb48/go.mod h1:if7Fbed8SFyPtHLHbg49SI7NAdJiC5WIA09pe59rfAA=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
-github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.3.1 h1:KjJaJ9iWZ3jOFZIf1Lqf4laDRCasjl0BCmnEGxkdLb4=
 github.com/google/uuid v1.3.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
@@ -35,17 +33,11 @@ github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRT
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
 golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI=
-golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
-golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
 golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
-golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
 golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/tools v0.9.3 h1:Gn1I8+64MsuTb/HpH+LmQtNas23LhUVr3rYZ0eKuaMM=
-golang.org/x/tools v0.9.3/go.mod h1:owI94Op576fPu3cIGQeHs3joujW/2Oc6MtlxbF5dfNc=
 golang.org/x/tools v0.13.0 h1:Iey4qkscZuv0VvIt8E0neZjtPVQFSc870HQ448QgEmQ=
 golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=