1 files changed, 39 insertions, 0 deletions
diff --git a/option.go b/option.go
new file mode 100644
index 0000000..9333e84
--- /dev/null
+++ b/option.go
@@ -0,0 +1,39 @@
+package complete
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+type Option interface {
+	String() string
+	Matches(prefix string) bool
+}
+
+type Arg string
+
+func (a Arg) String() string {
+	return string(a)
+}
+
+func (a Arg) Matches(prefix string) bool {
+	return strings.HasPrefix(string(a), prefix)
+}
+
+type ArgFileName string
+
+func (a ArgFileName) String() string {
+	return string(a)
+}
+
+func (a ArgFileName) Matches(prefix string) bool {
+	full, err := filepath.Abs(string(a))
+	if err != nil {
+		logger("failed getting abs path of %s: %s", a, err)
+	}
+	prefixFull, err := filepath.Abs(prefix)
+	if err != nil {
+		logger("failed getting abs path of %s: %s", prefix, err)
+	}
+	return strings.HasPrefix(full, prefixFull)
+}