Create an empty universal framework.

Author: andersio

.gitignore

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+# macOS
+.DS_Store
+
+# Xcode
+build/*
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+!default.xcworkspace
+xcuserdata
+profile
+*.moved-aside
+PlaygroundUtility.remap
+*.xctimeline
+*.xcscmblueprint
+*.o
+
+# SwiftPM
+.build
+Packages
+
+# Carthage
+Carthage/Build
+
+# Jazzy
+docs

.gitmodules

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+[submodule "Carthage/Checkouts/Nimble"]
+	path = Carthage/Checkouts/Nimble
+	url = https://github.com/Quick/Nimble.git
+[submodule "Carthage/Checkouts/xcconfigs"]
+	path = Carthage/Checkouts/xcconfigs
+	url = https://github.com/jspahrsummers/xcconfigs.git
+[submodule "Carthage/Checkouts/Quick"]
+	path = Carthage/Checkouts/Quick
+	url = https://github.com/Quick/Quick.git

.swift-version

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+4.0

.travis.yml

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+language: objective-c
+osx_image: xcode9
+before_install:
+  - brew uninstall carthage
+  - HOMEBREW_NO_AUTO_UPDATE=1 brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/6ae4f69a652fb0ecb102b0c9216378679a4f1b92/Formula/carthage.rb # 0.22.0
+install: true
+branches:
+  only:
+    - master
+    # Credit: @Omnikron13, https://github.com/mojombo/semver/issues/32
+    - /^(\d+\.\d+\.\d+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?$/
+    - /^hotfix-(\d+\.\d+\.\d+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?$/
+cache:
+  directories:
+    - $HOME/Library/Caches/org.carthage.CarthageKit/dependencies
+    - Carthage/Build
+
+jobs:
+  include:
+    - osx_image: xcode9
+      script:
+        - XCODE_SCHEME=FlexibleDiff
+          XCODE_SDK=macosx
+          XCODE_ACTION="build test"
+          XCODE_DESTINATION="arch=x86_64"
+          script/build
+        - XCODE_SCHEME=FlexibleDiff
+          XCODE_SDK=iphonesimulator
+          XCODE_ACTION="build-for-testing test-without-building"
+          XCODE_DESTINATION="platform=iOS Simulator,name=iPhone 6s"
+          script/build
+        - XCODE_SCHEME=FlexibleDiff
+          XCODE_SDK=appletvsimulator
+          XCODE_ACTION="build-for-testing test-without-building"
+          XCODE_DESTINATION="platform=tvOS Simulator,name=Apple TV 1080p"
+          script/build
+        - XCODE_SCHEME=FlexibleDiff
+          XCODE_SDK=watchsimulator
+          XCODE_ACTION=build
+          XCODE_DESTINATION="platform=watchOS Simulator,name=Apple Watch - 38mm,OS=2.2"
+          script/build
+    - script:
+        - pod repo update --silent
+        - pod lib lint FlexibleDiff.podspec
+      env:
+        - JOB=PODSPEC
+    - stage: carthage
+      script: carthage build --cache-builds --no-skip-current

Cartfile

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+github "jspahrsummers/xcconfigs"

Cartfile.private

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+github "Quick/Nimble" ~> 7.0
+github "Quick/Quick" ~> 1.2

Cartfile.resolved

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+github "Quick/Nimble" "v7.0.2"
+github "Quick/Quick" "v1.2.0"
+github "jspahrsummers/xcconfigs" "0.11"