From 7dc37c2a4fd2c4bfb49b01dc381f9eac5c1a7621 Mon Sep 17 00:00:00 2001
From: Michael Mifsud <xzyfer@gmail.com>
Date: Sat, 23 Apr 2016 12:17:25 +1000
Subject: [PATCH] Always define compact

This implement of compact is functionally equivalent of the
unofficial native one that has been permanently removed from LibSass.
There is no risk in always using this version. The version of LibSass
that had a `compact` function is extremely difficult to obtain, and
is long unsupported.

More importantly defining function inside control structures is not
valid in Sass and produces errors for people using this library.

Fixes #84
Fixes #85
---
 lib/compass/css3/_transition.scss |  6 +++---
 lib/compass/functions/_lists.scss | 18 +++++++++---------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/lib/compass/css3/_transition.scss b/lib/compass/css3/_transition.scss
index 8573b98..6feb36c 100644
--- a/lib/compass/css3/_transition.scss
+++ b/lib/compass/css3/_transition.scss
@@ -176,9 +176,9 @@ $transitionable-prefixed-values: transform, transform-origin !default;
     // Keep a list of delays in case one is specified
     $delays: append($delays, if($delay, $delay, 0s));
 
-    $webkit-value: append($webkit-value, compact(prefixed-for-transition(-webkit, $property) $duration $timing-function));
-       $moz-value: append(   $moz-value, compact(prefixed-for-transition(   -moz, $property) $duration $timing-function $delay));
-         $o-value: append(     $o-value, compact(prefixed-for-transition(     -o, $property) $duration $timing-function $delay));
+    $webkit-value: append($webkit-value, compact((prefixed-for-transition(-webkit, $property) $duration $timing-function)...));
+       $moz-value: append(   $moz-value, compact((prefixed-for-transition(   -moz, $property) $duration $timing-function $delay)...));
+         $o-value: append(     $o-value, compact((prefixed-for-transition(     -o, $property) $duration $timing-function $delay)...));
   }
 
   @if $experimental-support-for-webkit    {       -webkit-transition : $webkit-value;
diff --git a/lib/compass/functions/_lists.scss b/lib/compass/functions/_lists.scss
index dadb5a9..e24cc80 100644
--- a/lib/compass/functions/_lists.scss
+++ b/lib/compass/functions/_lists.scss
@@ -20,6 +20,7 @@
 // compass_list can't be implemented in sass script
 
 @function -compass-space-list($item1, $item2:null, $item3:null, $item4:null, $item5:null, $item6:null, $item7:null, $item8:null, $item9:null) {
+  $items: ();
   // Support for polymorphism.
   @if type-of($item1) == 'list' {
     // Passing a single array of properties.
@@ -77,14 +78,13 @@
   @return nth($list, 1);
 }
 
-@if not(function-exists(compact)) {
-  @function compact($vars...) {
-    $list: ();
-    @each $var in $vars {
-        @if $var {
-            $list: append($list, $var, comma);
-        }
-    }
-    @return $list;
+@function compact($vars...) {
+  $separator: list-separator($vars);
+  $list: ();
+  @each $var in $vars {
+      @if $var {
+          $list: append($list, $var, $separator);
+      }
   }
+  @return $list;
 }