login_source: migrate to GORM and add tests (#6090)

* Use GORM in all write paths

* Migrate to GORM

* Fix lint errors

* Use GORM  to init table

* dbutil: make writer detect error

* Add more tests

* Rename to clearTables

* db: finish adding tests

* osutil: add tests

* Fix load source files path

1 files changed, 10 insertions, 0 deletions

diff --git a/internal/osutil/osutil.go b/internal/osutil/osutil.go
index 3af67570..b2205a46 100644
--- a/internal/osutil/osutil.go
+++ b/internal/osutil/osutil.go
@@ -17,6 +17,16 @@ func IsFile(path string) bool {
 	return !f.IsDir()
 }
 
+// IsDir returns true if given path is a directory, and returns false when it's
+// a file or does not exist.
+func IsDir(dir string) bool {
+	f, e := os.Stat(dir)
+	if e != nil {
+		return false
+	}
+	return f.IsDir()
+}
+
 // IsExist returns true if a file or directory exists.
 func IsExist(path string) bool {
 	_, err := os.Stat(path)