Default working directory when $HOME is not present (#1296)

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 2.1.3 (Unreleased)
 **Bug Fixes**
 - Invalidate attribute cache entry on `PathAlreadyExists` error in create directory operation.
+- When `$HOME` environment variable is not present, use the current directory.
 
 ## 2.1.2 (2023-11-17)
 **Bug Fixes**

common/types.go

@@ -305,3 +305,13 @@ func GetIdLength(id string) int64 {
 	existingBlockId, _ := base64.StdEncoding.DecodeString(id)
 	return int64(len(existingBlockId))
 }
+
+func init() {
+	val, present := os.LookupEnv("HOME")
+	if !present {
+		val = "./"
+	}
+	DefaultWorkDir = filepath.Join(val, ".blobfuse2")
+	DefaultLogFilePath = filepath.Join(DefaultWorkDir, "blobfuse2.log")
+	StatsConfigFilePath = filepath.Join(DefaultWorkDir, "stats_monitor.cfg")
+}

common/types_test.go

@@ -34,6 +34,8 @@
 package common
 
 import (
+	"os"
+	"path/filepath"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -95,3 +97,11 @@ func (suite *typesTestSuite) TestFindBlocksToModify() {
 	suite.assert.Equal(largerThanFile, true)
 	suite.assert.Equal(appendOnly, true)
 }
+
+func (suite *typesTestSuite) TestDefaultWorkDir() {
+	val, err := os.UserHomeDir()
+	suite.assert.Nil(err)
+	suite.assert.Equal(DefaultWorkDir, filepath.Join(val, ".blobfuse2"))
+	suite.assert.Equal(DefaultLogFilePath, filepath.Join(val, ".blobfuse2/blobfuse2.log"))
+	suite.assert.Equal(StatsConfigFilePath, filepath.Join(val, ".blobfuse2/stats_monitor.cfg"))
+}