Add CocoaPods support (instacart#13)

Fixes instacart#5

Author: msanders

.gitmodules

@@ -1,7 +1,3 @@
-[submodule "External/CTrueTime"]
-	path = External/CTrueTime
-	url = https://github.com/instacart/CTrueTime.git
-	branch = 1.0.0
 [submodule "External/xcconfigs"]
 	path = External/xcconfigs
 	url = https://github.com/jspahrsummers/xcconfigs.git

.swift-version

@@ -0,0 +1 @@
+2.3

External/CTrueTime

@@ -0,0 +1,4 @@
+module CTrueTime [system] {
+  header "ntp_types.h"
+  export *
+}

Sources/CTrueTime/module.modulemap

@@ -0,0 +1,45 @@
+//
+//  ntp_types.h
+//  TrueTime
+//
+//  Created by Michael Sanders on 7/11/16.
+//  Copyright © 2016 Instacart. All rights reserved.
+//
+
+#ifndef NTP_TYPES_H
+#define NTP_TYPES_H
+
+#include <stdint.h>
+
+typedef struct {
+    uint16_t whole;
+    uint16_t fraction;
+} __attribute__((packed, aligned(1))) ntp_time32_t;
+
+typedef struct {
+    uint32_t whole;
+    uint32_t fraction;
+} __attribute__((packed, aligned(1))) ntp_time64_t;
+
+typedef ntp_time64_t ntp_time_t;
+
+typedef struct {
+    uint8_t client_mode: 3;
+    uint8_t version_number: 3;
+    uint8_t leap_indicator: 2;
+
+    uint8_t stratum;
+    uint8_t poll;
+    uint8_t precision;
+
+    ntp_time32_t root_delay;
+    ntp_time32_t root_dispersion;
+    uint8_t reference_id[4];
+
+    ntp_time_t reference_time;
+    ntp_time_t originate_time;
+    ntp_time_t receive_time;
+    ntp_time_t transmit_time;
+} __attribute__((packed, aligned(1))) ntp_packet_t;
+
+#endif /* NTP_TYPES_H */

Sources/CTrueTime/ntp_types.h

@@ -0,0 +1,21 @@
+Pod::Spec.new do |s|
+  s.name = 'TrueTime'
+  s.version = '3.0.0'
+  s.summary = 'NTP library for Swift. Get the true time impervious to device clock changes.'
+
+  s.homepage = 'https://github.com/instacart/TrueTime.swift'
+  s.license = { :type => 'Apache License, Version 2.0', :file => 'LICENSE' }
+  s.author = { 'Michael Sanders' => 'msanders@instacart.com' }
+  s.source = { :git => 'https://github.com/instacart/TrueTime.swift.git', :tag => s.version }
+
+  s.requires_arc = true
+  s.ios.deployment_target = '8.0'
+  s.osx.deployment_target = '10.9'
+  s.tvos.deployment_target = '9.0'
+
+  s.source_files = 'Sources/*.{swift,h,m}', 'Sources/CTrueTime/*.h'
+  s.public_header_files = 'Sources/*.h'
+  s.pod_target_xcconfig = { 'SWIFT_INCLUDE_PATHS' => '$(SRCROOT)/TrueTime/Sources/CTrueTime/**' }
+  s.preserve_paths  = 'Sources/CTrueTime/module.modulemap'
+  s.dependency 'Result', '~> 2.1'
+end

TrueTime.podspec

@@ -1164,7 +1164,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.instacart.TrueTime;
 				PRODUCT_NAME = TrueTime;
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/External/CTrueTime";
+				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/Sources/CTrueTime";
 				SWIFT_INSTALL_OBJC_HEADER = YES;
 				SWIFT_OBJC_INTERFACE_HEADER_NAME = "$(SWIFT_MODULE_NAME)-Swift.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@@ -1192,7 +1192,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.instacart.TrueTime;
 				PRODUCT_NAME = TrueTime;
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/External/CTrueTime";
+				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/Sources/CTrueTime";
 				SWIFT_INSTALL_OBJC_HEADER = YES;
 				SWIFT_OBJC_INTERFACE_HEADER_NAME = "$(SWIFT_MODULE_NAME)-Swift.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
@@ -1251,7 +1251,7 @@
 				PRODUCT_NAME = TrueTime;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/External/CTrueTime";
+				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/Sources/CTrueTime";
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Debug;
@@ -1274,7 +1274,7 @@
 				PRODUCT_NAME = TrueTime;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/External/CTrueTime";
+				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/Sources/CTrueTime";
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 			};
 			name = Release;
@@ -1338,7 +1338,7 @@
 				PRODUCT_NAME = TrueTime;
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/External/CTrueTime";
+				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/Sources/CTrueTime";
 				SWIFT_INSTALL_OBJC_HEADER = YES;
 			};
 			name = Debug;
@@ -1364,7 +1364,7 @@
 				PRODUCT_NAME = TrueTime;
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/External/CTrueTime";
+				SWIFT_INCLUDE_PATHS = "$(SRCROOT) $(SRCROOT)/Sources/CTrueTime";
 				SWIFT_INSTALL_OBJC_HEADER = YES;
 			};
 			name = Release;