feat: prepend homedir

Author: katallaxie

utils/files/cp.go

@@ -67,6 +67,44 @@ func ExpandHomeFolder(path string) (string, error) {
 	return buffer.String(), nil
 }
 
+// PrependHomeFolder ...
+func PrependHomeFolder(path string) (string, error) {
+	if strings.HasPrefix(path, string(os.PathSeparator)) {
+		return path, nil
+	}
+
+	var buffer bytes.Buffer
+	usr, err := user.Current()
+	if err != nil {
+		return "", err
+	}
+
+	_, err = buffer.WriteString(filepath.Join(usr.HomeDir, filepath.Clean(path)))
+	if err != nil {
+		return "", err
+	}
+
+	return buffer.String(), nil
+}
+
+// Transformer ...
+type Transformer func(path string) (string, error)
+
+// PathTransform ...
+func PathTransform(path string, funcs ...Transformer) (string, error) {
+	p := path
+
+	var err error
+	for _, fn := range funcs {
+		p, err = fn(path)
+		if err != nil {
+			return "", err
+		}
+	}
+
+	return p, nil
+}
+
 func copy(src, dst string) (int64, error) {
 	sfi, err := os.Stat(src)
 	if err != nil {

utils/files/cp_test.go

@@ -4,6 +4,7 @@ import (
 	"io/ioutil"
 	"os"
 	"os/user"
+	"path/filepath"
 	"strings"
 	"testing"
 
@@ -99,3 +100,29 @@ func TestCopyFileMkdir(t *testing.T) {
 
 	assert.Equal(t, "Hello World", string(b))
 }
+
+func TestPrependHomeFolder(t *testing.T) {
+	sr, err := user.Current()
+	assert.NoError(t, err)
+
+	var tests = []struct {
+		desc        string
+		path        string
+		expected    string
+		expectedErr error
+	}{
+		{
+			path:        "csync/.nanorc",
+			expected:    filepath.Join(sr.HomeDir, "csync/.nanorc"),
+			expectedErr: nil,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.desc, func(t *testing.T) {
+			p, err := files.PrependHomeFolder(tc.path)
+			assert.NoError(t, err)
+			assert.Equal(t, tc.expected, p)
+		})
+	}
+}