local: add --local-no-check-updated to disable update checks #2206

This disables the `can't copy - source file is being updated` checks.

backend/local/local_internal_test.go

@@ -29,8 +29,10 @@ func TestMapper(t *testing.T) {
 	})
 	assert.Equal(t, "potato", m.Load("potato"))
 	assert.Equal(t, "-r?'a´o¨", m.Load("-r'áö"))
+}
 
-	// Test copy with source file that's updating
+// Test copy with source file that's updating
+func TestUpdatingCheck(t *testing.T) {
 	r := fstest.NewRun(t)
 	defer r.Finalise()
 	filePath := "sub dir/local test"
@@ -59,4 +61,16 @@ func TestMapper(t *testing.T) {
 	r.WriteFile(filePath, "content updated", time.Now())
 	_, err = in.Read(buf)
 	require.Errorf(t, err, "can't copy - source file is being updated")
+
+	// turn the checking off and try again
+
+	*noCheckUpdated = true
+	defer func() {
+		*noCheckUpdated = false
+	}()
+
+	r.WriteFile(filePath, "content updated", time.Now())
+	_, err = in.Read(buf)
+	require.NoError(t, err)
+
 }