Dependency Management talk at Women Who Code - iOS Atlanta Meetup

1. Women Who Code
iOS Meetup
2016 AUG 21

4. While on your journey of introducing a new experience for your amazing app
you hit a decision point.
Do you develop write your own code or do you use something someone has
written?
If you want to DIY, turn to page 57
If you want to use something someone has written, turn to page 154

10. What this talk IS covering
Dependency Management Options
Pros and Cons of each
My personal bias

11. What this talk IS NOT
covering
Application Architecture (kind of)
Project Structure (sort of)
System Configuration (just a little)

12. 154

14. Cocoapods in 5 “easy” steps
$ sudo gem install cocoapods && pod setup —-verbose
$ pod init
$ pod install
$ nano Podfile
1
2
3
4
// sudo because it’s a global install
// gem because it’s written in Ruby
// Run setup… go take a break
// if setup breaks… there’s a fix
// creates a ‘Podfile’ with defaults
// Assumes you already are at the top level of your project
// (personal choice) use linux text editor for initial changes to Podfile
// select your platform
// select the libraries you want to use
// exit from the editor
// install libraries
5 $ open MyApp.xcworkspace // open workspace in XCode. W T H is a workspace?
# Uncomment this line to define a global platform for your project
# platform :ios, '9.0'
target 'PrettyRandom' do
# Comment this line if you're not using Swift and don't want to use dynamic frameworks
use_frameworks!
# Pods for PrettyRandom
pod 'CocoaLumberjack/Swift'
target 'PrettyRandomTests' do
inherit! :search_paths
# Pods for testing
end
target 'PrettyRandomUITests' do
inherit! :search_paths
# Pods for testing
end
end

15. # Uncomment this line to define a global platform for your project
# platform :ios, '9.0'
target 'PrettyRandom' do
# Comment this line if you're not using Swift and don't want to use dynamic frameworks
use_frameworks!
# Pods for PrettyRandom
pod 'CocoaLumberjack/Swift'
target 'PrettyRandomTests' do
inherit! :search_paths
# Pods for testing
end
target 'PrettyRandomUITests' do
inherit! :search_paths
# Pods for testing
end
end

19. I love homebrew
http://brew.sh

21. Carthage in 5 “easy”-ish steps
$ brew install carthage
$ nano Cartfile
$ carthage update —-platform iOS
1
2
3
4
// shouldn’t take long
// it’s easier to start a Cartfile from here
// install libraries for the type of app you are building for
// extremely minimalistic
// This is platform dependent
// you must manually link your libraries
// It has to be done through the XCode UI
4?
github "CocoaLumberjack/CocoaLumberjack"

22. Carthage Step 4 (a) … (c)
macOS
iOS, watchOS, tvOS
• On your application targets’ “General” settings tab, in the “Embedded Binaries” section, drag and drop each
framework you want to use from the Carthage/Build folder on disk.
• On your application target’s “Build Phases” settings tab, click the “+” icon and choose “New Copy Files Phase”.
• For each framework you’re using, drag and drop its corresponding dSYM file.
• On your application targets’ “General” settings tab, in the “Linked Frameworks and Libraries” section, drag and
drop each framework you want to use from the Carthage/Build folder on disk.
• On your application targets’ “Build Phases” settings tab, click the “+” icon and choose “New Run Script Phase”.
Create a Run Script in which you specify your shell (ex: bin/sh), add the following contents to the script area below
the shell:
• and add the paths to the frameworks you want to use under “Input Files”, e.g.:
/usr/local/bin/carthage copy-frameworks
$(SRCROOT)/Carthage/Build/iOS/Box.framework
$(SRCROOT)/Carthage/Build/iOS/Result.framework
$(SRCROOT)/Carthage/Build/iOS/ReactiveCocoa.framework

27. Swift PM in 5
$ swift package init --type executable
$ swift package generate-xcodeproj
1
2
3
5
// creates a ‘Package.swift’ with defaults
// Assumes you already are at the top level of
your project
// depending on your internets, this could take a while
// add dependencies
// generates PrettyRandom.xcodeproj file
Install Xcode 8.0 (beta)
$ open PrettyRandom.xcodeproj
4
import PackageDescription
let package = Package(
name: "PrettyRandom",
dependencies: [
.Package(url: "https://github.com/thecb4/SwiftyJSON.git", versions: Version(3,0,2)..<Version(3,0,34)),
]
)
$ nano Package.swift
// open Xcode (beta) and realize nothing works because
the library isn’t Swift 3 compatible

28. Swift PM in 5… Nevermind
$ swift package init --type executable
$ swift package generate-xcodeproj
1
2
3
5
// creates a ‘Package.swift’ with defaults
// Assumes you already are at the top level of
your project
// depending on your internets, this could take a while
// add dependencies
// generates PrettyRandom.xcodeproj file
Install Xcode 8.0 (beta)
$ open PrettyRandom.xcodeproj
4
import PackageDescription
let package = Package(
name: "PrettyRandom",
dependencies: [
.Package(url: "https://github.com/thecb4/SwiftyJSON.git", versions: Version(3,0,2)..<Version(3,0,34)),
]
)
$ nano Package.swift
// open Xcode (beta) and realize nothing works because
the library isn’t Swift 3 compatible

30. side by side comparison

31. Written In Ruby Swift Swift
Current Version 1.0.1 0.16.2 swiftpm-18
Control File Podfile Cartfile Package.swift
Repository Cocoapods Trunk git git
Libraries 3000+ 3000+1 ???
Search Index website,
command line
If it’s on github you can
use it1
IBM Catalog
Version support Semantic Semantic Semantic
Target Support Yes What target? On Roadmap
Integration Type Source Source or Binary Source
Platform Support
macOS, iOS, watchOS,
tvOS
macOS, iOS, watchOS,
tvOS
Linux, macOS2, iOS2,
watchOS2, tvOS2
Swift Support 2.2.3 2.2.3 3.0
1. The library has to have a Shared Scheme to work
2. If you are building a library you are fine. Anything with a UI is a lot of work

32. I love carthage
https://github.com/Carthage/Carthage

33. Written In Ruby Swift Swift
Current Version 1.0.1 0.16.2 swiftpm-18
Control File Podfile Cartfile Package.swift
Repository Cocoapods Trunk git git
Libraries 3000+ 3000+1 ???
Search Index website,
command line
If it’s on github you can
use it1
IBM Catalog
Version support Semantic Semantic Semantic
Target Support Yes What target? On Roadmap
Integration Type Source Source or Binary Source
Platform Support
macOS, iOS, watchOS,
tvOS
macOS, iOS, watchOS,
tvOS
Linux, macOS2, iOS2,
watchOS2, tvOS2
Swift Support 2.2.3 2.2.3 3.0
1. The library has to have a Shared Scheme to work
2. If you are building a library you are fine. Anything with a UI is a lot of work

35. Any Questions?

36. references
These slides… http://goo.gl/oJM5Pf
Homebrew… http://brew.sh
Carthage… https://github.com/Carthage/Carthage
Cocoapods… https://cocoapods.org
Swift Package Manager… https://swift.org/package-manager
Libraries vs. Frameworks… http://www.knowstack.com/framework-vs-library-cocoa-ios/

37. contact
cavelle@thecb4.io
@_thecb4