add --quiet=true for swag init, make the debug logger quiet.

cmd/swag/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"io/ioutil"
 	"log"
 	"os"
 	"strings"
@@ -30,9 +31,15 @@ const (
 	instanceNameFlag     = "instanceName"
 	overridesFileFlag    = "overridesFile"
 	parseGoListFlag      = "parseGoList"
+	quietFlag            = "quiet"
 )
 
 var initFlags = []cli.Flag{
+	&cli.BoolFlag{
+		Name:    quietFlag,
+		Aliases: []string{q},
+		Usage:   "Make the logger quiet.",
+	},
 	&cli.StringFlag{
 		Name:    generalInfoFlag,
 		Aliases: []string{"g"},
@@ -131,6 +138,10 @@ func initAction(ctx *cli.Context) error {
 	if len(outputTypes) == 0 {
 		return fmt.Errorf("no output types specified")
 	}
+	var logger swag.Debugger
+	if ctx.Bool(quietFlag) {
+		logger = log.New(ioutil.Discard, "", log.LstdFlags)
+	}
 
 	return gen.New().Build(&gen.Config{
 		SearchDir:           ctx.String(searchDirFlag),
@@ -149,6 +160,7 @@ func initAction(ctx *cli.Context) error {
 		InstanceName:        ctx.String(instanceNameFlag),
 		OverridesFile:       ctx.String(overridesFileFlag),
 		ParseGoList:         ctx.Bool(parseGoListFlag),
+		Debugger:            logger,
 	})
 }
 

gen/gen.go

@@ -57,6 +57,8 @@ func New() *Gen {
 
 // Config presents Gen configurations.
 type Config struct {
+	Debugger swag.Debugger
+
 	// SearchDir the swag would parse,comma separated if multiple
 	SearchDir string
 
@@ -145,6 +147,7 @@ func (g *Gen) Build(config *Config) error {
 	log.Println("Generate swagger docs....")
 
 	p := swag.New(swag.SetMarkdownFileDirectory(config.MarkdownFilesDir),
+		swag.SetDebugger(config.Debugger),
 		swag.SetExcludedDirsAndFiles(config.Excludes),
 		swag.SetCodeExamplesDirectory(config.CodeExampleFilesDir),
 		swag.SetStrict(config.Strict),

gen/gen_test.go

@@ -1,10 +1,12 @@
 package gen
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"io/ioutil"
+	"log"
 	"os"
 	"os/exec"
 	"path"
@@ -750,3 +752,30 @@ func TestGen_TypeOverridesFile(t *testing.T) {
 		assert.NoError(t, err)
 	})
 }
+func TestGen_Debugger(t *testing.T) {
+	var buf bytes.Buffer
+	config := &Config{
+		SearchDir:          searchDir,
+		MainAPIFile:        "./main.go",
+		OutputDir:          "../testdata/simple/docs",
+		OutputTypes:        outputTypes,
+		PropNamingStrategy: "",
+		Debugger:           log.New(&buf, "", log.LstdFlags),
+	}
+	assert.True(t, buf.Len() == 0)
+	assert.NoError(t, New().Build(config))
+	assert.True(t, buf.Len() > 0)
+
+	expectedFiles := []string{
+		filepath.Join(config.OutputDir, "docs.go"),
+		filepath.Join(config.OutputDir, "swagger.json"),
+		filepath.Join(config.OutputDir, "swagger.yaml"),
+	}
+	for _, expectedFile := range expectedFiles {
+		if _, err := os.Stat(expectedFile); os.IsNotExist(err) {
+			require.NoError(t, err)
+		}
+
+		_ = os.Remove(expectedFile)
+	}
+}

parser.go

@@ -245,7 +245,10 @@ func SetStrict(strict bool) func(*Parser) {
 // SetDebugger allows the use of user-defined implementations.
 func SetDebugger(logger Debugger) func(parser *Parser) {
 	return func(p *Parser) {
-		p.debug = logger
+		if logger != nil {
+			p.debug = logger
+		}
+
 	}
 }