Move error types to errors.go

cli.go

@@ -17,53 +17,3 @@
 //     app.Run(os.Args)
 //   }
 package cli
-
-import (
-	"fmt"
-	"strings"
-)
-
-type MultiError struct {
-	Errors []error
-}
-
-func NewMultiError(err ...error) MultiError {
-	return MultiError{Errors: err}
-}
-
-func (m MultiError) Error() string {
-	errs := make([]string, len(m.Errors))
-	for i, err := range m.Errors {
-		errs[i] = err.Error()
-	}
-
-	return strings.Join(errs, "\n")
-}
-
-type ExitCoder interface {
-	ExitCode() int
-}
-
-type ExitError struct {
-	exitCode int
-	message  string
-}
-
-func NewExitError(message string, exitCode int) *ExitError {
-	return &ExitError{
-		exitCode: exitCode,
-		message:  message,
-	}
-}
-
-func (ee *ExitError) Error() string {
-	return ee.message
-}
-
-func (ee *ExitError) String() string {
-	return fmt.Sprintf("%s exitcode=%v", ee.message, ee.exitCode)
-}
-
-func (ee *ExitError) ExitCode() int {
-	return ee.exitCode
-}

errors.go

@@ -0,0 +1,51 @@
+package cli
+
+import (
+	"fmt"
+	"strings"
+)
+
+type MultiError struct {
+	Errors []error
+}
+
+func NewMultiError(err ...error) MultiError {
+	return MultiError{Errors: err}
+}
+
+func (m MultiError) Error() string {
+	errs := make([]string, len(m.Errors))
+	for i, err := range m.Errors {
+		errs[i] = err.Error()
+	}
+
+	return strings.Join(errs, "\n")
+}
+
+type ExitCoder interface {
+	ExitCode() int
+}
+
+type ExitError struct {
+	exitCode int
+	message  string
+}
+
+func NewExitError(message string, exitCode int) *ExitError {
+	return &ExitError{
+		exitCode: exitCode,
+		message:  message,
+	}
+}
+
+func (ee *ExitError) Error() string {
+	return ee.message
+}
+
+func (ee *ExitError) String() string {
+	return fmt.Sprintf("%s exitcode=%v", ee.message, ee.exitCode)
+}
+
+func (ee *ExitError) ExitCode() int {
+	return ee.exitCode
+}