playground,cluster: respect HOME env variable

components/playground/main.go

@@ -21,7 +21,6 @@ import (
 	_ "net/http/pprof"
 	"os"
 	"os/signal"
-	"os/user"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -546,11 +545,11 @@ func getAbsolutePath(path string) (string, error) {
 	}
 
 	if strings.HasPrefix(path, "~/") {
-		usr, err := user.Current()
+		homedir, err := os.UserHomeDir()
 		if err != nil {
 			return "", errors.Annotatef(err, "retrieve user home failed")
 		}
-		path = filepath.Join(usr.HomeDir, path[2:])
+		path = filepath.Join(homedir, path[2:])
 	}
 
 	absPath, err := filepath.Abs(path)

components/playground/playground_test.go

@@ -15,7 +15,6 @@ package main
 
 import (
 	"os"
-	"os/user"
 	"path/filepath"
 	"testing"
 
@@ -34,11 +33,11 @@ func TestPlaygroundAbsDir(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, "/b", b)
 
-	u, err := user.Current()
+	h, err := os.UserHomeDir()
 	assert.Nil(t, err)
 	c, err := getAbsolutePath("~/c/d/e")
 	assert.Nil(t, err)
-	assert.Equal(t, filepath.Join(u.HomeDir, "c/d/e"), c)
+	assert.Equal(t, filepath.Join(h, "c/d/e"), c)
 }
 
 func TestParseMysqlCommand(t *testing.T) {

pkg/cluster/spec/profile.go

@@ -15,7 +15,6 @@ package spec
 
 import (
 	"os"
-	"os/user"
 	"path"
 	"path/filepath"
 
@@ -43,11 +42,11 @@ var profileDir string
 // getHomeDir get the home directory of current user (if they have one).
 // The result path might be empty.
 func getHomeDir() (string, error) {
-	u, err := user.Current()
+	homedir, err := os.UserHomeDir()
 	if err != nil {
 		return "", errors.Trace(err)
 	}
-	return u.HomeDir, nil
+	return homedir, nil
 }
 
 var initialized = false

pkg/localdata/profile.go

@@ -22,7 +22,6 @@ import (
 	"net/http"
 	"os"
 	"os/exec"
-	"os/user"
 	"path/filepath"
 	"sort"
 	"strings"
@@ -54,11 +53,11 @@ func InitProfile() *Profile {
 	case DefaultTiUPHome != "":
 		profileDir = DefaultTiUPHome
 	default:
-		u, err := user.Current()
+		homedir, err := os.UserHomeDir()
 		if err != nil {
 			panic("cannot get current user information: " + err.Error())
 		}
-		profileDir = filepath.Join(u.HomeDir, ProfileDirName)
+		profileDir = filepath.Join(homedir, ProfileDirName)
 	}
 
 	cfg, err := InitConfig(profileDir)