Do not rewrite ~ (#2496)

* Do not rewrite ~

Fixes #2083

RELEASE_NOTES=[ENHANCEMENT] Do not rewrite ~.

Signed-off-by: Dominik Schulz <dominik.schulz@gauner.org>

* Honor GOPASS_HOMEDIR

Signed-off-by: Dominik Schulz <dominik.schulz@gauner.org>

Signed-off-by: Dominik Schulz <dominik.schulz@gauner.org>

pkg/fsutil/fsutil.go

@@ -7,7 +7,6 @@ import (
 	"io"
 	"math/rand"
 	"os"
-	"os/user"
 	"path/filepath"
 	"regexp"
 	"strings"
@@ -26,20 +25,16 @@ func CleanFilename(in string) string {
 
 // CleanPath resolves common aliases in a path and cleans it as much as possible.
 func CleanPath(path string) string {
-	// http://stackoverflow.com/questions/17609732/expand-tilde-to-home-directory
-	// TODO(GH-2083): We should consider if we really want to rewrite ~
+	// Only replace ~ if GOPASS_HOMEDIR is set. In that case we do expect any reference
+	// to the users homedir to be replaced by the value of GOPASS_HOMEDIR. This is mainly
+	// for testing and experiments. In all other cases we do want to leave ~ as-is.
 	if len(path) > 1 && path[:2] == "~/" {
-		usr, _ := user.Current()
-		dir := usr.HomeDir
-
 		if hd := os.Getenv("GOPASS_HOMEDIR"); hd != "" {
-			dir = hd
+			return filepath.Clean(hd + path[2:])
 		}
-
-		path = strings.Replace(path, "~/", dir+"/", 1)
 	}
 
-	if p, err := filepath.Abs(path); err == nil {
+	if p, err := filepath.Abs(path); err == nil && !strings.HasPrefix(path, "~") {
 		return p
 	}
 

pkg/fsutil/fsutil_test.go

@@ -4,8 +4,9 @@ import (
 	"crypto/rand"
 	"io/ioutil"
 	"os"
-	"os/user"
 	"path/filepath"
+	"runtime"
+	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -34,21 +35,21 @@ func TestCleanPath(t *testing.T) {
 		"/home/user/../bob/.password-store": "/home/bob/.password-store",
 		"/home/user//.password-store":       "/home/user/.password-store",
 		tempdir + "/foo.gpg":                tempdir + "/foo.gpg",
-	}
-
-	usr, err := user.Current()
-	if err == nil {
-		hd := usr.HomeDir
-		if gph := os.Getenv("GOPASS_HOMEDIR"); gph != "" {
-			hd = gph
-		}
-
-		m["~/.password-store"] = hd + "/.password-store"
+		"~/.password-store":                 "~/.password-store",
 	}
 
 	for in, out := range m {
 		got := CleanPath(in)
 
+		if strings.HasPrefix(out, "~") {
+			// skip these tests on windows
+			if runtime.GOOS == "windows" {
+				continue
+			}
+			assert.Equal(t, out, got)
+
+			continue
+		}
 		// filepath.Abs turns /home/bob into C:\home\bob on Windows
 		absOut, err := filepath.Abs(out)
 		assert.NoError(t, err)