New formatter: unix (#65)

config.go

@@ -72,6 +72,7 @@ var allFormatters = []lint.Formatter{
 	&formatter.JSON{},
 	&formatter.NDJSON{},
 	&formatter.Default{},
+	&formatter.Unix{},
 	&formatter.Checkstyle{},
 }
 

formatter/unix.go

@@ -0,0 +1,27 @@
+package formatter
+
+import (
+	"fmt"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// Unix is an implementation of the Formatter interface
+// which formats the errors to a simple line based error format
+//  main.go:24:9: [errorf] should replace errors.New(fmt.Sprintf(...)) with fmt.Errorf(...)
+type Unix struct {
+	Metadata lint.FormatterMetadata
+}
+
+// Name returns the name of the formatter
+func (f *Unix) Name() string {
+	return "unix"
+}
+
+// Format formats the failures gotten from the lint.
+func (f *Unix) Format(failures <-chan lint.Failure, config lint.RulesConfig) (string, error) {
+	for failure := range failures {
+		fmt.Printf("%v: [%s] %s\n", failure.Position.Start, failure.RuleName, failure.Failure)
+	}
+	return "", nil
+}