Cache Carthage builds.

Author: ashfurrow

.gitignore

@@ -29,8 +29,7 @@ Pods/
 #
 # Add this line if you want to avoid checking in source code from Carthage dependencies.
 #
-Carthage/Checkouts
-Carthage/Build
+Carthage
 .DS_Store
 
 # SPM

Carthage/Checkouts/Nimble

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+carthage bootstrap
+cp Cartfile.resolved Carthage

Carthage/Checkouts/Quick

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Borrowed from https://robots.thoughtbot.com/caching-carthage-con-circleci
+
+if ! cmp -s Cartfile.resolved Carthage/Cartfile.resolved; then
+  bin/bootstrap
+fi
+

Carthage/Checkouts/RxSwift

@@ -5,9 +5,9 @@ machine:
     LANG: en_US.UTF-8
 dependencies:
   override:
-    - echo "Skipping CocoaPods Specs install."
-    - carthage version
-    - carthage bootstrap
+    - bin/bootstrap-if-needed
+  cache_directories:
+    - "Carthage"
 test:
   override:
   - set -o pipefail