Add options for remic (#4)

* Fix filename

* Add options

cmd/remic/main.go

@@ -50,6 +50,19 @@ OPTIONS:
 			Name:  "output, o",
 			Usage: "output file name",
 		},
+		cli.IntFlag{
+			Name:  "exit-code",
+			Usage: "Exit code when vulnerabilities were found",
+			Value: 0,
+		},
+		cli.BoolFlag{
+			Name:  "skip-update",
+			Usage: "skip db update",
+		},
+		cli.BoolFlag{
+			Name:  "ignore-unfixed",
+			Usage: "display only fixed vulnerabilities",
+		},
 		cli.BoolFlag{
 			Name:  "debug, d",
 			Usage: "debug mode",

pkg/remic/run.go

@@ -27,7 +27,8 @@ func Run(c *cli.Context) (err error) {
 
 	args := c.Args()
 	if len(args) == 0 {
-		return xerrors.New(`remic" requires at least 1 argument.`)
+		log.Logger.Info(`remic" requires at least 1 argument.`)
+		cli.ShowAppHelpAndExit(c, 1)
 	}
 
 	o := c.String("output")
@@ -51,8 +52,10 @@ func Run(c *cli.Context) (err error) {
 		return err
 	}
 
-	if err = vulnsrc.Update(); err != nil {
-		return err
+	if !c.Bool("skip-update") {
+		if err = vulnsrc.Update(); err != nil {
+			return xerrors.Errorf("error in vulnerability DB update: %w", err)
+		}
 	}
 
 	fileName := args[0]
@@ -62,7 +65,8 @@ func Run(c *cli.Context) (err error) {
 	}
 	defer f.Close()
 
-	result, err := scanner.ScanFile(f, severities)
+	ignoreUnfixed := c.Bool("ignore-unfixed")
+	result, err := scanner.ScanFile(f, severities, ignoreUnfixed)
 	if err != nil {
 		return xerrors.Errorf("failed to scan a file: %w", err)
 	}
@@ -81,5 +85,14 @@ func Run(c *cli.Context) (err error) {
 		return xerrors.Errorf("failed to write results: %w", err)
 	}
 
+	exitCode := c.Int("exit-code")
+	if exitCode != 0 {
+		for _, result := range []report.Result{result} {
+			if len(result.Vulnerabilities) > 0 {
+				os.Exit(exitCode)
+			}
+		}
+	}
+
 	return nil
 }

pkg/scanner/library/scan.go

@@ -72,7 +72,7 @@ func Scan(files extractor.FileMap) (map[string][]types.Vulnerability, error) {
 }
 
 func ScanFile(f *os.File) ([]types.Vulnerability, error) {
-	scanner := NewScanner(f.Name())
+	scanner := NewScanner(filepath.Base(f.Name()))
 	if scanner == nil {
 		return nil, xerrors.New("unknown file type")
 	}

pkg/scanner/scan.go

@@ -72,7 +72,7 @@ func ScanImage(imageName, filePath string, severities []vulnerability.Severity,
 
 	osFamily, osVersion, osVulns, err := ospkg.Scan(files)
 	if err != nil {
-		return nil, xerrors.New("failed to scan image")
+		return nil, xerrors.Errorf("failed to scan image: %w", err)
 
 	}
 
@@ -83,7 +83,7 @@ func ScanImage(imageName, filePath string, severities []vulnerability.Severity,
 
 	libVulns, err := library.Scan(files)
 	if err != nil {
-		return nil, xerrors.New("failed to scan libraries")
+		return nil, xerrors.Errorf("failed to scan libraries: %w", err)
 	}
 	for path, vulns := range libVulns {
 		results = append(results, report.Result{
@@ -95,14 +95,14 @@ func ScanImage(imageName, filePath string, severities []vulnerability.Severity,
 	return results, nil
 }
 
-func ScanFile(f *os.File, severities []vulnerability.Severity) (report.Result, error) {
+func ScanFile(f *os.File, severities []vulnerability.Severity, ignoreUnfixed bool) (report.Result, error) {
 	vulns, err := library.ScanFile(f)
 	if err != nil {
-		return report.Result{}, xerrors.New("failed to scan libraries in file")
+		return report.Result{}, xerrors.Errorf("failed to scan libraries in file: %w", err)
 	}
 	result := report.Result{
 		FileName:        f.Name(),
-		Vulnerabilities: processVulnerabilties(vulns, severities, false),
+		Vulnerabilities: processVulnerabilties(vulns, severities, ignoreUnfixed),
 	}
 	return result, nil
 }