fix lint prealloc

.golangci.yml

@@ -19,7 +19,6 @@ linters:
     - gochecknoinits
     - gocyclo
     - scopelint
-    - prealloc
     - goconst
     - maligned
     - golint

codegen/config/config.go

@@ -16,7 +16,7 @@ import (
 	"github.com/pkg/errors"
 	"github.com/vektah/gqlparser"
 	"github.com/vektah/gqlparser/ast"
-	yaml "gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v2"
 )
 
 type Config struct {
@@ -459,9 +459,9 @@ func (c *Config) InjectBuiltins(s *ast.Schema) {
 func (c *Config) LoadSchema() (*ast.Schema, map[string]string, error) {
 	schemaStrings := map[string]string{}
 
-	var sources []*ast.Source
+	sources := make([]*ast.Source, len(c.SchemaFilename))
 
-	for _, filename := range c.SchemaFilename {
+	for i, filename := range c.SchemaFilename {
 		filename = filepath.ToSlash(filename)
 		var err error
 		var schemaRaw []byte
@@ -471,7 +471,7 @@ func (c *Config) LoadSchema() (*ast.Schema, map[string]string, error) {
 			os.Exit(1)
 		}
 		schemaStrings[filename] = string(schemaRaw)
-		sources = append(sources, &ast.Source{Name: filename, Input: schemaStrings[filename]})
+		sources[i] = &ast.Source{Name: filename, Input: schemaStrings[filename]}
 	}
 
 	schema, err := gqlparser.LoadSchema(sources...)

codegen/field.go

@@ -384,16 +384,16 @@ func (f *Field) ComplexitySignature() string {
 }
 
 func (f *Field) ComplexityArgs() string {
-	var args []string
-	for _, arg := range f.Args {
-		args = append(args, "args["+strconv.Quote(arg.Name)+"].("+templates.CurrentImports.LookupType(arg.TypeReference.GO)+")")
+	args := make([]string, len(f.Args))
+	for i, arg := range f.Args {
+		args[i] = "args[" + strconv.Quote(arg.Name) + "].(" + templates.CurrentImports.LookupType(arg.TypeReference.GO) + ")"
 	}
 
 	return strings.Join(args, ", ")
 }
 
 func (f *Field) CallArgs() string {
-	var args []string
+	args := make([]string, 0, len(f.Args)+2)
 
 	if f.IsResolver {
 		args = append(args, "rctx")

graphql/introspection/schema.go

@@ -11,7 +11,7 @@ type Schema struct {
 }
 
 func (s *Schema) Types() []Type {
-	var types []Type
+	types := make([]Type, 0, len(s.schema.Types))
 	for _, typ := range s.schema.Types {
 		if strings.HasPrefix(typ.Name, "__") {
 			continue
@@ -34,7 +34,7 @@ func (s *Schema) SubscriptionType() *Type {
 }
 
 func (s *Schema) Directives() []Directive {
-	var res []Directive
+	res := make([]Directive, 0, len(s.schema.Directives))
 
 	for _, d := range s.schema.Directives {
 		res = append(res, s.directiveFromDef(d))
@@ -44,19 +44,19 @@ func (s *Schema) Directives() []Directive {
 }
 
 func (s *Schema) directiveFromDef(d *ast.DirectiveDefinition) Directive {
-	var locs []string
-	for _, loc := range d.Locations {
-		locs = append(locs, string(loc))
+	locs := make([]string, len(d.Locations))
+	for i, loc := range d.Locations {
+		locs[i] = string(loc)
 	}
 
-	var args []InputValue
-	for _, arg := range d.Arguments {
-		args = append(args, InputValue{
+	args := make([]InputValue, len(d.Arguments))
+	for i, arg := range d.Arguments {
+		args[i] = InputValue{
 			Name:         arg.Name,
 			Description:  arg.Description,
 			DefaultValue: defaultValue(arg.DefaultValue),
 			Type:         WrapTypeFromType(s.schema, arg.Type),
-		})
+		}
 	}
 
 	return Directive{

handler/websocket.go

@@ -279,9 +279,9 @@ func (c *wsConnection) sendData(id string, response *graphql.Response) {
 }
 
 func (c *wsConnection) sendError(id string, errors ...*gqlerror.Error) {
-	var errs []error
-	for _, err := range errors {
-		errs = append(errs, err)
+	errs := make([]error, len(errors))
+	for i, err := range errors {
+		errs[i] = err
 	}
 	b, err := json.Marshal(errs)
 	if err != nil {