Added logic to generate a temp directory

pkg/fshelper/fshelper.go

@@ -0,0 +1,11 @@
+package fshelper
+
+// TempDirExecFunc is the function that runs in the temp path
+type TempDirExecFunc func(path string) error
+
+type FsHelper interface {
+	CreatePath(filename string) error
+	ReadJson(filename string, obj interface{}) error
+	WriteJson(filename string, obj interface{}) error
+	RunInTempDir(useFullPath bool, exec TempDirExecFunc) error
+}

pkg/fshelper/loader.go

@@ -7,12 +7,6 @@ import (
 	"path/filepath"
 )
 
-type FsHelper interface {
-	CreatePath(filename string) error
-	ReadJson(filename string, obj interface{}) error
-	WriteJson(filename string, obj interface{}) error
-}
-
 type FsHelp struct {
 	Fs afero.Fs
 }

pkg/fshelper/runner.go

@@ -0,0 +1,44 @@
+package fshelper
+
+import (
+	"log"
+	"os"
+	"path"
+)
+
+const TempDirName = "swiztmpdir"
+
+// RunInTempDir runs the specified function in a temporary directory that gets cleaned up
+func (f FsHelp) RunInTempDir(useFullPath bool, exec TempDirExecFunc) error {
+	log.Printf("[DEBUG] Creating temp dir %v", TempDirName)
+
+	// Create dir
+	err := f.Fs.Mkdir(TempDirName, 0700)
+	if err != nil {
+		return err
+	}
+
+	dir := TempDirName
+	if useFullPath {
+		wdDir, wdErr := os.Getwd()
+		if wdErr != nil {
+			return wdErr
+		}
+		dir = path.Join(wdDir, TempDirName)
+	}
+
+	// Execute
+	err = exec(dir)
+	if err != nil {
+		return err
+	}
+
+	// Clean up
+	log.Printf("[DEBUG] Cleaning up temp directory")
+	err = os.RemoveAll(TempDirName)
+	if err != nil {
+		log.Printf("[WARN] Error removing temporary directory %v", TempDirName)
+	}
+
+	return nil
+}