diff --git a/gitcha.go b/gitcha.go
new file mode 100644
index 0000000..f6a7d4d
--- /dev/null
+++ b/gitcha.go
@@ -0,0 +1,63 @@
+package gitcha
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func IsPathInGit(path string) (bool, error) {
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		return false, err
+	}
+
+	for {
+		dir := filepath.Dir(absPath)
+
+		st, err := os.Stat(filepath.Join(dir, ".git"))
+		if err == nil && st.IsDir() {
+			return true, nil
+		}
+
+		if dir == absPath {
+			// reached root
+			return false, nil
+		}
+		absPath = dir
+	}
+}
+
+func FindFirstInList(path string, list []string) (string, error) {
+	path, err := filepath.Abs(path)
+	if err != nil {
+		return "", err
+	}
+	st, err := os.Stat(path)
+	if err != nil {
+		return "", err
+	}
+	if !st.IsDir() {
+		return "", errors.New("not a directory")
+	}
+
+	var res string
+	_ = filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
+		for _, v := range list {
+			if strings.EqualFold(filepath.Base(path), v) {
+				res, _ = filepath.Abs(path)
+
+				// abort filepath.Walk
+				return errors.New("source found")
+			}
+		}
+		return nil
+	})
+
+	if res != "" {
+		return res, nil
+	}
+
+	return "", errors.New("none found")
+}
diff --git a/gitcha_test.go b/gitcha_test.go
new file mode 100644
index 0000000..bb2e6d3
--- /dev/null
+++ b/gitcha_test.go
@@ -0,0 +1,63 @@
+package gitcha
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+func TestIsPathInGit(t *testing.T) {
+	tt := []struct {
+		path string
+		exp  bool
+	}{
+		{"/", false},
+		{".", false},
+		{"gitcha.go", true},
+	}
+
+	for _, test := range tt {
+		r, err := IsPathInGit(test.path)
+		if err != nil {
+			t.Error(err)
+		}
+
+		if test.exp != r {
+			t.Errorf("Expected %v, got %v for %s", test.exp, r, test.path)
+		}
+	}
+}
+
+func TestFindFirstInList(t *testing.T) {
+	tt := []struct {
+		path   string
+		list   []string
+		exp    string
+		expErr bool
+	}{
+		{"../", []string{"gitcha.go"}, "gitcha.go", false},
+		{".", []string{"gitcha_test.go"}, "gitcha_test.go", false},
+		{".", []string{"exist.not"}, "", true},
+	}
+
+	for _, test := range tt {
+		r, err := FindFirstInList(test.path, test.list)
+		if err != nil && !test.expErr {
+			t.Error(err)
+		}
+		if err == nil && test.expErr {
+			t.Errorf("Expected error, got none for %s", test.path)
+		}
+
+		if err != nil && test.expErr {
+			continue
+		}
+
+		test.exp, err = filepath.Abs(test.exp)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if test.exp != r {
+			t.Errorf("Expected %v, got %v for %s", test.exp, r, test.path)
+		}
+	}
+}