Add support for YAML output format

README.md

@@ -105,7 +105,7 @@ $ gas -nosec=true ./...
 
 ### Output formats
 
-Gas currently supports text, json, csv and JUnit XML output formats. By default
+Gas currently supports text, json, yaml, csv and JUnit XML output formats. By default
 results will be reported to stdout, but can also be written to an output
 file. The output format is controlled by the '-fmt' flag, and the output file is controlled by the '-out' flag as follows:
 

cmd/gas/main.go

@@ -59,7 +59,7 @@ var (
 	flagIgnoreNoSec = flag.Bool("nosec", false, "Ignores #nosec comments when set")
 
 	// format output
-	flagFormat = flag.String("fmt", "text", "Set output format. Valid options are: json, csv, junit-xml, html, or text")
+	flagFormat = flag.String("fmt", "text", "Set output format. Valid options are: json, yaml, csv, junit-xml, html, or text")
 
 	// output file
 	flagOutput = flag.String("out", "", "Set output file for results")

output/formatter.go

@@ -23,6 +23,7 @@ import (
 	plainTemplate "text/template"
 
 	"github.com/GoASTScanner/gas"
+	"gopkg.in/yaml.v2"
 )
 
 // ReportFormat enumrates the output format for reported issues
@@ -72,6 +73,8 @@ func CreateReport(w io.Writer, format string, issues []*gas.Issue, metrics *gas.
 	switch format {
 	case "json":
 		err = reportJSON(w, data)
+	case "yaml":
+		err = reportYAML(w, data)
 	case "csv":
 		err = reportCSV(w, data)
 	case "junit-xml":
@@ -99,6 +102,15 @@ func reportJSON(w io.Writer, data *reportInfo) error {
 	return err
 }
 
+func reportYAML(w io.Writer, data *reportInfo) error {
+	raw, err := yaml.Marshal(data)
+	if err != nil {
+		return err
+	}
+	_, err = w.Write(raw)
+	return err
+}
+
 func reportCSV(w io.Writer, data *reportInfo) error {
 	out := csv.NewWriter(w)
 	defer out.Flush()