added shellcheck-exclude option

cmd/root.go

@@ -10,7 +10,10 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var ignores []string
+var (
+	ignores            []string
+	shellcheckExcludes []string
+)
 
 // RootCmd represents the base command when called without any subcommands
 var RootCmd = &cobra.Command{
@@ -40,8 +43,13 @@ func check(file string) error {
 		status.Ignore(file)
 		return nil
 	}
+	var options = sh.Options{
+		Shellcheck: sh.ShellcheckOptions{
+			Exclude: shellcheckExcludes,
+		},
+	}
 	var errors []error
-	for _, check := range sh.Checkers() {
+	for _, check := range sh.Checkers(options) {
 		if err := check.Check(file); err != nil {
 			errors = append(errors, err)
 		}
@@ -73,6 +81,12 @@ func init() {
 		[]string{},
 		"ignore specific folder of file patterns",
 	)
+	RootCmd.PersistentFlags().StringSliceVar(
+		&shellcheckExcludes,
+		"shellcheck-exclude",
+		[]string{},
+		"pass arguments to shellcheck --exclude option",
+	)
 }
 
 // Execute adds all child commands to the root command sets flags appropriately.

sh/check.go

@@ -4,11 +4,18 @@ import (
 	"fmt"
 	"os/exec"
 	"runtime"
+	"strings"
 )
 
 const shellcheckPath = "/tmp/shellcheck"
 
+// ShellcheckOptions pass down options to the shellcheck binary
+type ShellcheckOptions struct {
+	Exclude []string
+}
+
 type shellcheck struct {
+	options ShellcheckOptions
 }
 
 // Check a file with shellcheck
@@ -17,7 +24,12 @@ func (s *shellcheck) Check(file string) error {
 	if err != nil {
 		return err
 	}
-	out, err := exec.Command(bin, "-x", file).CombinedOutput()
+	var args = []string{"--external-sources"}
+	if len(s.options.Exclude) != 0 {
+		args = append(args, "--exclude", strings.Join(s.options.Exclude, ","))
+	}
+	args = append(args, file)
+	out, err := exec.Command(bin, args...).CombinedOutput()
 	if err == nil {
 		return nil
 	}

sh/sh.go

@@ -13,10 +13,15 @@ type Checker interface {
 	Install() (string, error)
 }
 
+// Options provides options to the underline checkers
+type Options struct {
+	Shellcheck ShellcheckOptions
+}
+
 // Checkers all checkers
-func Checkers() []Checker {
+func Checkers(opts Options) []Checker {
 	return []Checker{
-		&shellcheck{},
+		&shellcheck{opts.Shellcheck},
 		&shfmt{},
 	}
 }