diff --git a/analyzer.go b/analyzer.go
index 23deb65..12aff3c 100644
--- a/analyzer.go
+++ b/analyzer.go
@@ -101,7 +101,7 @@ func (gas *Analyzer) Process(packagePath string) error {
 	}
 
 	packageConfig := loader.Config{Build: &build.Default, ParserMode: parser.ParseComments}
-	packageFiles := make([]string, 0)
+	var packageFiles []string
 	for _, filename := range basePackage.GoFiles {
 		packageFiles = append(packageFiles, path.Join(packagePath, filename))
 	}
diff --git a/analyzer_test.go b/analyzer_test.go
index 2376d43..e69a822 100644
--- a/analyzer_test.go
+++ b/analyzer_test.go
@@ -52,6 +52,27 @@ var _ = Describe("Analyzer", func() {
 
 		})
 
+		It("should be able to analyze mulitple Go files", func() {
+			analyzer.LoadRules(rules.Generate().Builders()...)
+			pkg := testutils.NewTestPackage()
+			defer pkg.Close()
+			pkg.AddFile("foo.go", `
+				package main
+				func main(){
+					bar()
+				}`)
+			pkg.AddFile("bar.go", `
+				package main
+				func bar(){
+					println("package has two files!")
+				}`)
+			pkg.Build()
+			err := analyzer.Process(pkg.Path)
+			Expect(err).ShouldNot(HaveOccurred())
+			_, metrics := analyzer.Report()
+			Expect(metrics.NumFiles).To(Equal(2))
+		})
+
 		It("should find errors when nosec is not in use", func() {
 
 			// Rule for MD5 weak crypto usage
diff --git a/cmd/gas/main.go b/cmd/gas/main.go
index 37d876b..ef20462 100644
--- a/cmd/gas/main.go
+++ b/cmd/gas/main.go
@@ -91,7 +91,7 @@ func usage() {
 	flag.PrintDefaults()
 	fmt.Fprint(os.Stderr, "\n\nRULES:\n\n")
 
-	// sorted rule list for eas of reading
+	// sorted rule list for ease of reading
 	rl := rules.Generate()
 	keys := make([]string, 0, len(rl))
 	for key := range rl {
@@ -126,13 +126,19 @@ func loadConfig(configFile string) (gas.Config, error) {
 func loadRules(include, exclude string) rules.RuleList {
 	var filters []rules.RuleFilter
 	if include != "" {
+		log.Printf("including rules: %s", include)
 		including := strings.Split(include, ",")
 		filters = append(filters, rules.NewRuleFilter(false, including...))
+	} else {
+		log.Println("including rules: default")
 	}
 
 	if exclude != "" {
+		log.Printf("excluding rules: %s", exclude)
 		excluding := strings.Split(exclude, ",")
 		filters = append(filters, rules.NewRuleFilter(true, excluding...))
+	} else {
+		log.Println("excluding rules: default")
 	}
 	return rules.Generate(filters...)
 }
@@ -186,6 +192,9 @@ func main() {
 
 	// Load enabled rule definitions
 	ruleDefinitions := loadRules(*flagRulesInclude, *flagRulesExclude)
+	if len(ruleDefinitions) <= 0 {
+		log.Fatal("cannot continue: no rules are configured.")
+	}
 
 	// Create the analyzer
 	analyzer := gas.NewAnalyzer(config, logger)
diff --git a/config.go b/config.go
index ba9b9cd..09b97d3 100644
--- a/config.go
+++ b/config.go
@@ -8,6 +8,12 @@ import (
 	"io/ioutil"
 )
 
+const (
+	// Globals are applicable to all rules and used for general
+	// configuration settings for gas.
+	Globals = "global"
+)
+
 // Config is used to provide configuration and customization to each of the rules.
 type Config map[string]interface{}
 
@@ -16,7 +22,7 @@ type Config map[string]interface{}
 // or from a *os.File.
 func NewConfig() Config {
 	cfg := make(Config)
-	cfg["global"] = make(map[string]string)
+	cfg[Globals] = make(map[string]string)
 	return cfg
 }
 
@@ -60,7 +66,7 @@ func (c Config) Set(section string, value interface{}) {
 
 // GetGlobal returns value associated with global configuration option
 func (c Config) GetGlobal(option string) (string, error) {
-	if globals, ok := c["global"]; ok {
+	if globals, ok := c[Globals]; ok {
 		if settings, ok := globals.(map[string]string); ok {
 			if value, ok := settings[option]; ok {
 				return value, nil
@@ -74,7 +80,7 @@ func (c Config) GetGlobal(option string) (string, error) {
 
 // SetGlobal associates a value with a global configuration ooption
 func (c Config) SetGlobal(option, value string) {
-	if globals, ok := c["global"]; ok {
+	if globals, ok := c[Globals]; ok {
 		if settings, ok := globals.(map[string]string); ok {
 			settings[option] = value
 		}