build source

vendor/github.com/fergusstrange/embedded-postgres/rename.go

@@ -0,0 +1,27 @@
+package embeddedpostgres
+
+import (
+	"errors"
+	"os"
+	"syscall"
+)
+
+// renameOrIgnore will rename the oldpath to the newpath.
+//
+// On Unix this will be a safe atomic operation.
+// On Windows this will do nothing if the new path already exists.
+//
+// This is only safe to use if you can be sure that the newpath is either missing, or contains the same data as the
+// old path.
+func renameOrIgnore(oldpath, newpath string) error {
+	err := os.Rename(oldpath, newpath)
+
+	// if the error is due to syscall.EEXIST then this is most likely windows, and a race condition with
+	// multiple downloads of the file. We can assume that the existing file is the correct one and ignore
+	// the error
+	if errors.Is(err, syscall.EEXIST) {
+		return nil
+	}
+
+	return err
+}