SQLCipher CocoaPods support

Using a sub-spec, it's easy to use SQLCipher, as well:

    pod 'SQLite.swift/Cipher', git: # ...

Signed-off-by: Stephen Celis <stephen@stephencelis.com>

Documentation/Index.md

@@ -79,6 +79,7 @@
     ``` ruby
     use_frameworks!
     pod 'SQLite.swift', git: 'https://github.com/stephencelis/SQLite.swift.git'
+    # pod 'SQLite.swift/Cipher', git: ... # instead, for SQLCipher support
     ```
 
  3. Run `pod install`.
@@ -104,13 +105,13 @@ To install SQLite.swift as an Xcode sub-project:
 You should now be able to `import SQLite` from any of your target’s source files and begin using SQLite.swift.
 
 
-### SQLCipher
+#### SQLCipher
 
 To install SQLite.swift with [SQLCipher](http://sqlcipher.net) support:
 
  1. Make sure the **sqlcipher** working copy is checked out in Xcode. If **sqlcipher.xcodeproj** is unavailable (_i.e._, it appears red), go to the **Source Control** menu and select **Check Out sqlcipher…** from the **sqlcipher** menu item.
 
- 2. Follow [the instructions above](#installation) with the **SQLiteCipher** target, instead.
+ 2. Follow [the instructions above](#manual) with the **SQLiteCipher** target, instead.
 
 > _Note:_ By default, SQLCipher compiles [without support for full-text search](https://github.com/sqlcipher/sqlcipher/issues/102). If you intend to use [FTS4](#full-text-search), make sure you add the following to **Other C Flags** in the **Build Settings** of the **sqlcipher** target (in the **sqlcipher.xcodeproj** project):
 >

README.md

@@ -119,17 +119,18 @@ interactively, from the Xcode project’s playground.
 [CocoaPods][] is a dependency manager for Cocoa projects. To install
 SQLite.swift with CocoaPods:
 
-  1. Make sure CocoaPods is [installed][CocoaPods Installation] (SQLite.swift
-     requires version 0.37 or greater).
+ 1. Make sure CocoaPods is [installed][CocoaPods Installation] (SQLite.swift
+    requires version 0.37 or greater).
 
-  2. Update your Podfile to include the following:
+ 2. Update your Podfile to include the following:
 
-     ``` ruby
-     use_frameworks!
-     pod 'SQLite.swift', git: 'https://github.com/stephencelis/SQLite.swift.git'
-     ```
+    ``` ruby
+    use_frameworks!
+    pod 'SQLite.swift', git: 'https://github.com/stephencelis/SQLite.swift.git'
+    # pod 'SQLite.swift/Cipher', git: ... # instead, for SQLCipher support
+    ```
 
-  3. Run `pod install`.
+ 3. Run `pod install`.
 
 [CocoaPods]: https://cocoapods.org
 [CocoaPods Installation]: https://guides.cocoapods.org/using/getting-started.html#getting-started
@@ -168,8 +169,8 @@ To install SQLite.swift with [SQLCipher][] support:
     **Source Control** menu and select **Check Out sqlcipher…** from the
     **sqlcipher** menu item.
 
- 2. Follow [the instructions above](#installation) with the
-    **SQLiteCipher** target, instead.
+ 2. Follow [the instructions above](#manual) with the **SQLiteCipher** target,
+    instead.
 
 > _Note:_ By default, SQLCipher compiles [without support for full-text
 > search][]. If you intend to use [FTS4][], make sure you add the

SQLite.swift.podspec

@@ -15,15 +15,34 @@ Pod::Spec.new do |s|
   s.author = { 'Stephen Celis' => 'stephen@stephencelis.com' }
   s.social_media_url = 'https://twitter.com/stephencelis'
 
-  s.library = 'sqlite3'
-
   s.source = {
     git: 'https://github.com/stephencelis/SQLite.swift.git',
     tag: s.version
   }
 
-  s.source_files = 'SQLite/**/*.{swift,c,h,m}'
-  s.private_header_files = 'SQLite/fts3_tokenizer.h'
-
   s.module_map = 'SQLite/module.modulemap'
+
+  s.default_subspec = 'Library'
+
+  s.subspec 'Core' do |ss|
+    ss.source_files = 'SQLite/**/*.{swift,c,h,m}'
+    ss.private_header_files = 'SQLite/fts3_tokenizer.h'
+  end
+
+  s.subspec 'Library' do |ss|
+    ss.dependency 'SQLite.swift/Core'
+
+    ss.library = 'sqlite3'
+  end
+
+  s.subspec 'Cipher' do |ss|
+    ss.dependency 'SQLCipher'
+    ss.dependency 'SQLite.swift/Core'
+
+    ss.source_files = 'SQLiteCipher/**/*.{swift,c,h,m}'
+
+    ss.xcconfig = {
+      'GCC_PREPROCESSOR_DEFINITIONS' => '$(inherited) SQLITE_HAS_CODEC=1'
+    }
+  end
 end