From 8db58e6ceb7bc7d6792797b134943db2b6e2502d Mon Sep 17 00:00:00 2001
From: Dominic Barnes <dominic@dbarnes.info>
Date: Tue, 21 Jul 2015 15:17:24 -0700
Subject: [PATCH 1/4] be more specific with testing raw/src internally

---
 lib/file.js | 9 +++++----
 test/api.js | 4 ++++
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/lib/file.js b/lib/file.js
index baa601b..a5e970a 100644
--- a/lib/file.js
+++ b/lib/file.js
@@ -102,11 +102,12 @@ File.prototype.dependencies = function () {
  */
 
 File.prototype.load = function *() {
-  if (this.src) return this;
+  if (typeof this.src !== 'undefined') return this;
 
   // read the file
-  this.attrs.src = this.raw = this.raw
-    || (yield fs.readFile(this.path, 'utf8'));
+  var raw = this.raw;
+  if (typeof raw === 'undefined') raw = yield fs.readFile(this.path, 'utf8');
+  this.attrs.src = raw;
 
   // transform the file and update attributes
   var entry = this.entry ? this : this.duo.entry();
@@ -124,7 +125,7 @@ File.prototype.load = function *() {
  */
 
 File.prototype.exists = function *() {
-  if (this.raw) return true;
+  if (typeof this.raw !== 'undefined') return true;
   else return yield exists(this.path);
 };
 
diff --git a/test/api.js b/test/api.js
index 106d5b1..3dfe1d2 100644
--- a/test/api.js
+++ b/test/api.js
@@ -570,6 +570,10 @@ describe('Duo API', function () {
         assert.equal(ctx.b, 'b');
         assert.equal(ctx.c, 'c');
       });
+
+      it('should not fail when the input source code is empty', function *() {
+        yield Duo(path('simple')).entry('', 'css').run();
+      });
     });
 
     // describe('with .development(false)');

From 1dda5cbffb82bda8506ec6abc7a59809f200456f Mon Sep 17 00:00:00 2001
From: Dominic Barnes <dominic@dbarnes.info>
Date: Wed, 22 Jul 2015 10:40:54 -0700
Subject: [PATCH 2/4] upgrading eslint config

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 493e44a..4e0f90c 100644
--- a/package.json
+++ b/package.json
@@ -65,7 +65,7 @@
     "coffee-script": "^1.9.3",
     "duo-jade": "0.x",
     "eslint": "^0.23.0",
-    "eslint-config-duo": "0.0.1",
+    "eslint-config-duo": "0.0.4",
     "expect.js": "^0.3.1",
     "gnode": "^0.1.1",
     "gulp": "^3.9.0",

From 400410bcc3cb1cb04fcf033bf704defeb510f9cb Mon Sep 17 00:00:00 2001
From: Dominic Barnes <dominic@dbarnes.info>
Date: Wed, 22 Jul 2015 10:41:22 -0700
Subject: [PATCH 3/4] using more concise null comparison, which catches both
 null and undefined

---
 lib/file.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/file.js b/lib/file.js
index a5e970a..44cd115 100644
--- a/lib/file.js
+++ b/lib/file.js
@@ -106,7 +106,7 @@ File.prototype.load = function *() {
 
   // read the file
   var raw = this.raw;
-  if (typeof raw === 'undefined') raw = yield fs.readFile(this.path, 'utf8');
+  if (raw == null) raw = yield fs.readFile(this.path, 'utf8');
   this.attrs.src = raw;
 
   // transform the file and update attributes
@@ -125,7 +125,7 @@ File.prototype.load = function *() {
  */
 
 File.prototype.exists = function *() {
-  if (typeof this.raw !== 'undefined') return true;
+  if (this.raw == null) return true;
   else return yield exists(this.path);
 };
 

From 0a32f9647fd0eaa40bee5eb7254ca1e3217cd1fc Mon Sep 17 00:00:00 2001
From: Dominic Barnes <dominic@dbarnes.info>
Date: Wed, 22 Jul 2015 10:48:36 -0700
Subject: [PATCH 4/4] oops, flipped the logic

---
 lib/file.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/file.js b/lib/file.js
index 44cd115..190c1f3 100644
--- a/lib/file.js
+++ b/lib/file.js
@@ -125,7 +125,7 @@ File.prototype.load = function *() {
  */
 
 File.prototype.exists = function *() {
-  if (this.raw == null) return true;
+  if (this.raw != null) return true;
   else return yield exists(this.path);
 };