Replace go-homedir with stdlib calls

The purpose of github.com/mitchellh/go-homedir was to expand the user
home directory without CGO. Recent versions of `os/user` can retrieve
the user home directory without CGO and thus enable cross-compilation.

This change does not add the missing functionality of expanding
non-current-user home directories in a path (e.g. `~user2/dir/subdir`).
The reason for this is that the input of `pathOrContents` could be a
blob and parsing every byte slice matching `^~.*\/.*` as a path
considerably increases the chances that a binary blob is mistakenly
parsed as a path.

go.mod

@@ -5,7 +5,6 @@ go 1.22
 require (
 	github.com/gofrs/uuid/v5 v5.3.0
 	github.com/gophercloud/gophercloud/v2 v2.3.0
-	github.com/mitchellh/go-homedir v1.1.0
 	golang.org/x/sys v0.28.0
 	golang.org/x/text v0.21.0
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -2,8 +2,6 @@ github.com/gofrs/uuid/v5 v5.3.0 h1:m0mUMr+oVYUdxpMLgSYCZiXe7PuVPnI94+OMeVBNedk=
 github.com/gofrs/uuid/v5 v5.3.0/go.mod h1:CDOjlDMVAtN56jqyRUZh58JT31Tiw7/oQyEXZV+9bD8=
 github.com/gophercloud/gophercloud/v2 v2.3.0 h1:5ipI2Mgxee0TwQxqnOIUdTbzL4ZBB8GORyZko+yGXI0=
 github.com/gophercloud/gophercloud/v2 v2.3.0/go.mod h1:uJWNpTgJPSl2gyzJqcU/pIAhFUWvIkp8eE8M15n9rs4=
-github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
-github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=

internal/util.go

@@ -6,10 +6,10 @@ import (
 	"crypto/x509"
 	"fmt"
 	"os"
+	"os/user"
+	"path/filepath"
 	"reflect"
 	"strings"
-
-	"github.com/mitchellh/go-homedir"
 )
 
 // RemainingKeys will inspect a struct and compare it to a map. Any struct
@@ -91,11 +91,16 @@ func pathOrContents(poc string) ([]byte, bool, error) {
 
 	path := poc
 	if path[0] == '~' {
-		var err error
-		path, err = homedir.Expand(path)
+		usr, err := user.Current()
 		if err != nil {
 			return []byte(path), true, err
 		}
+
+		if len(path) == 1 {
+			path = usr.HomeDir
+		} else if strings.HasPrefix(path, "~/") {
+			path = filepath.Join(usr.HomeDir, path[2:])
+		}
 	}
 
 	if _, err := os.Stat(path); err == nil {