Adds carthage.sh to Loop (#335)

(see Carthage/Carthage#3019 for details)

Author: Rick Pasetto

Loop.xcodeproj/project.pbxproj

@@ -3129,7 +3129,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if [ -f $PROJECT_DIR/.gitmodules ]; then\n    echo \"Skipping checkout due to presence of .gitmodules file\"\n    if [ $ACTION = \"install\" ]; then\n        echo \"You're installing: Make sure to keep all submodules up-to-date and run carthage build after changes.\"\n    fi\nelse\n    echo \"Bootstrapping carthage dependencies\"\n    unset LLVM_TARGET_TRIPLE_SUFFIX\n    if ! cmp -s Cartfile.Resolved Carthage/Cartfile.resolved; then\n        time /usr/local/bin/carthage bootstrap --project-directory \"$SRCROOT\" --cache-builds\n        cp Cartfile.resolved Carthage\n    else\n        echo \"Carthage: not bootstrapping\"\n    fi\nfi\n";
+			shellScript = "if [ -f $PROJECT_DIR/.gitmodules ]; then\n    echo \"Skipping checkout due to presence of .gitmodules file\"\n    if [ $ACTION = \"install\" ]; then\n        echo \"You're installing: Make sure to keep all submodules up-to-date and run carthage build after changes.\"\n    fi\nelse\n    echo \"Bootstrapping Carthage dependencies...\"\n    unset LLVM_TARGET_TRIPLE_SUFFIX\n\n    if ! cmp -s Cartfile.Resolved Carthage/Cartfile.resolved; then\n        time ./Scripts/carthage.sh bootstrap --project-directory \"$SRCROOT\" --platform ios --cache-builds --verbose || exit 1\n        cp Cartfile.resolved Carthage\n    else\n        echo \"Carthage: not bootstrapping\"\n    fi\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		432CF88220D8BCD90066B889 /* Homebrew & Carthage Setup */ = {

Scripts/carthage.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+#
+# This script exists due to an issue with Carthage.  The script comes from https://github.com/Carthage/Carthage/issues/3019#issuecomment-665136323
+
+# carthage.sh
+# Usage example: ./carthage.sh build --platform iOS
+
+set -euo pipefail
+
+xcconfig=$(mktemp /tmp/static.xcconfig.XXXXXX)
+trap 'rm -f "$xcconfig"' INT TERM HUP EXIT
+
+# For Xcode 12 make sure EXCLUDED_ARCHS is set to arm architectures otherwise
+# the build will fail on lipo due to duplicate architectures.
+echo 'EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_simulator__NATIVE_ARCH_64_BIT_x86_64__XCODE_1200 = arm64 arm64e armv7 armv7s armv6 armv8' >> $xcconfig
+echo 'EXCLUDED_ARCHS = $(inherited) $(EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_$(EFFECTIVE_PLATFORM_SUFFIX)__NATIVE_ARCH_64_BIT_$(NATIVE_ARCH_64_BIT)__XCODE_$(XCODE_VERSION_MAJOR))' >> $xcconfig
+
+export XCODE_XCCONFIG_FILE="$xcconfig"
+carthage "$@"