feat: changed hidden matching from regex to prefix.

http/data.go

@@ -27,7 +27,7 @@ type data struct {
 
 // Check implements rules.Checker.
 func (d *data) Check(path string) bool {
-	if d.user.HideDotfiles && rules.MatchHidden.Matches(path) {
+	if d.user.HideDotfiles && rules.MatchHidden(path) {
 		return false
 	}
 

rules/rules.go

@@ -1,6 +1,7 @@
 package rules
 
 import (
+	"path/filepath"
 	"regexp"
 	"strings"
 )
@@ -18,9 +19,10 @@ type Rule struct {
 	Regexp *Regexp `json:"regexp"`
 }
 
-var MatchHidden = Rule{
+// MatchHidden matches paths with a basename
-	Regex:  true,
+// that begins with a dot.
-	Regexp: &Regexp{Raw: `\/\..*$`},
+func MatchHidden(path string) bool {
+	return filepath.Base(path)[0] == '.'
 }
 
 // Matches matches a path against a rule.

rules/rules_test.go

@@ -0,0 +1,23 @@
+package rules
+
+import "testing"
+
+func TestMatchHidden(t *testing.T) {
+	cases := map[string]bool{
+		"/":                   false,
+		"/src":                false,
+		"/src/":               false,
+		"/.circleci":          true,
+		"/a/b/c/.docker.json": true,
+		".docker.json":        true,
+		"Dockerfile":          false,
+		"/Dockerfile":         false,
+	}
+
+	for path, truth := range cases {
+		got := MatchHidden(path)
+		if got != truth {
+			t.Errorf("MatchHidden(%s)=%v; want %v", path, got, truth)
+		}
+	}
+}