Use vendor when building (#201)

* Use vendor code for all go calls

* Add missing vendor dependencies

* Add travis_retry to yarn install

* Fix go test call

vendor/github.com/99designs/gqlgen/codegen/args.go

@@ -0,0 +1,104 @@
+package codegen
+
+import (
+	"fmt"
+	"go/types"
+	"strings"
+
+	"github.com/99designs/gqlgen/codegen/config"
+	"github.com/99designs/gqlgen/codegen/templates"
+	"github.com/pkg/errors"
+	"github.com/vektah/gqlparser/ast"
+)
+
+type ArgSet struct {
+	Args     []*FieldArgument
+	FuncDecl string
+}
+
+type FieldArgument struct {
+	*ast.ArgumentDefinition
+	TypeReference *config.TypeReference
+	VarName       string      // The name of the var in go
+	Object        *Object     // A link back to the parent object
+	Default       interface{} // The default value
+	Directives    []*Directive
+	Value         interface{} // value set in Data
+}
+
+func (f *FieldArgument) Stream() bool {
+	return f.Object != nil && f.Object.Stream
+}
+
+func (b *builder) buildArg(obj *Object, arg *ast.ArgumentDefinition) (*FieldArgument, error) {
+	tr, err := b.Binder.TypeReference(arg.Type, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	argDirs, err := b.getDirectives(arg.Directives)
+	if err != nil {
+		return nil, err
+	}
+	newArg := FieldArgument{
+		ArgumentDefinition: arg,
+		TypeReference:      tr,
+		Object:             obj,
+		VarName:            templates.ToGoPrivate(arg.Name),
+		Directives:         argDirs,
+	}
+
+	if arg.DefaultValue != nil {
+		newArg.Default, err = arg.DefaultValue.Value(nil)
+		if err != nil {
+			return nil, errors.Errorf("default value is not valid: %s", err.Error())
+		}
+	}
+
+	return &newArg, nil
+}
+
+func (b *builder) bindArgs(field *Field, params *types.Tuple) error {
+	var newArgs []*FieldArgument
+
+nextArg:
+	for j := 0; j < params.Len(); j++ {
+		param := params.At(j)
+		for _, oldArg := range field.Args {
+			if strings.EqualFold(oldArg.Name, param.Name()) {
+				tr, err := b.Binder.TypeReference(oldArg.Type, param.Type())
+				if err != nil {
+					return err
+				}
+				oldArg.TypeReference = tr
+
+				newArgs = append(newArgs, oldArg)
+				continue nextArg
+			}
+		}
+
+		// no matching arg found, abort
+		return fmt.Errorf("arg %s not in schema", param.Name())
+	}
+
+	field.Args = newArgs
+	return nil
+}
+
+func (a *Data) Args() map[string][]*FieldArgument {
+	ret := map[string][]*FieldArgument{}
+	for _, o := range a.Objects {
+		for _, f := range o.Fields {
+			if len(f.Args) > 0 {
+				ret[f.ArgsFunc()] = f.Args
+			}
+		}
+	}
+
+	for _, d := range a.Directives {
+		if len(d.Args) > 0 {
+			ret[d.ArgsFunc()] = d.Args
+		}
+	}
+	return ret
+}