From 3cfbe6564c654b3639fd74422077c5f065525d87 Mon Sep 17 00:00:00 2001
From: Jeremy Wall <jeremy@marzhillstudios.com>
Date: Tue, 19 Feb 2019 15:32:04 -0600
Subject: [PATCH] FEATURE: Empty files result in Val::Empty as their result.

We also print a warning message for the consumer.
---
 src/build/mod.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/build/mod.rs b/src/build/mod.rs
index 0864e7c..ab6e05e 100644
--- a/src/build/mod.rs
+++ b/src/build/mod.rs
@@ -1648,7 +1648,12 @@ impl<'a> FileBuilder<'a> {
                 Some(importer) => {
                     let file_contents =
                         self.get_file_as_string(&def.path.pos, &def.path.fragment)?;
-                    let val = importer.import(file_contents.as_bytes())?;
+                    let val = if file_contents.len() == 0 {
+                        eprintln!("including an empty file. Use NULL as the result");
+                        Rc::new(Val::Empty)
+                    } else {
+                        importer.import(file_contents.as_bytes())?
+                    };
                     Ok(val)
                 }
                 None => Err(Box::new(error::BuildError::new(