Bringing CocoaPods to Linux

Talk on build systems and abstracting them inside CocoaPods. Given at NSSpain 2015. 🍷

Transcript

1. Bringing CocoaPods to Linux NSSpain, September 2015 Boris Bügling - @NeoNacho
2. CocoaPods dependency management ✅
3. Contentful content management ✅
4. Xcode?
5. Agenda 4 Why? 4 Xcode's build system 4 How does CocoaPods interact with it? 4 Alternatives 4 Plan
9. No Xcode on Linux
10. Xcode is broken
11. ya tu sabes
12. Quora Post from early 2014
13. Just two examples 4 Archiving watchOS 2.0 apps 4 CLANG_ENABLE_MODULES
14. [Xcode 7 beta] Linking dual (iphoneos and watchos) frameworks with same product name causes archive to fail http://openradar.appspot.com/22392501
16. CLANG_ENABLE_MODULES
17. Enables the use of modules for system APIs. System headers are imported as semantic modules instead of raw headers.
18. "system APIs" == any framework outside your target !
20. Bring back CocoaPods to its core and move rest (e.g. Xcode integration) into plugins. #2729 From October 2014 https://github.com/CocoaPods/CocoaPods/issues/ 2729
21. Solve everyday problems for Cocoa and Xcode developers.
22. Let's face it, programming sucks.
23. Xcode's build system
24. 4 Fairly old (Xcode3Core.ideplugin) 4 Entirely based on mtimes 4 Poorly documented
25. De-facto documentation 4 http://pewpewthespells.com/blog/ managing_xcode.html 4 http://pewpewthespells.com/blog/ buildsettings.html
26. Xcode project files !"#
27. Tomorrow 16:30 - 17:00 Grant Paul - Making Sense of Xcode
28. How does CocoaPods interact with it?
29. 4 Pods project 4 Integration into the user project 4 Linting
30. Pods project 4 Generated by our Xcodeproj gem 4 Targets for all Pods 4 XCConfig files
31. Private XCConfig #include "ContentfulDeliveryAPI.xcconfig" GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1 HEADER_SEARCH_PATHS = "${PODS_ROOT}/Headers/Private" "${PODS_ROOT}/Headers/Private/ContentfulDeliveryAPI" "${PODS_ROOT}/Headers/Public" "${PODS_ROOT}/Headers/Public/AFNetworking" "${PODS_ROOT}/Headers/Public/Bypass" "${PODS_ROOT}/Headers/Public/CGLMail" "${PODS_ROOT}/Headers/Public/ContentfulDeliveryAPI" "${PODS_ROOT}/Headers/Public/ContentfulDialogs" "${PODS_ROOT}/Headers/Public/ContentfulPersistence" "${PODS_ROOT}/Headers/Public/ContentfulStyle" "${PODS_ROOT}/Headers/Public/DDPageControl" "${PODS_ROOT}/Headers/Public/EDColor" "${PODS_ROOT}/Headers/Public/FBSnapshotTestCase" "${PODS_ROOT}/Headers/Public/ISO8601DateFormatter" "${PODS_ROOT}/Headers/Public/LatoFont" "${PODS_ROOT}/Headers/Public/TSMiniWebBrowser@dblock" OTHER_LDFLAGS = ${CONTENTFULDELIVERYAPI_OTHER_LDFLAGS} -ObjC PODS_ROOT = ${SRCROOT} SKIP_INSTALL = YES
32. Build settings 4 GCC_PREPROCESSOR_DEFINITIONS 4 HEADER_SEARCH_PATHS 4 OTHER_LDFLAGS
34. User project 4 Optional integration (--no-integrate) 4 Implicit target dependencies 4 XCConfig files
35. Public XCConfig CONTENTFULDELIVERYAPI_OTHER_LDFLAGS = -framework "MapKit" -framework "UIKit"
36. If you edit OTHER_LDFLAGS in your project, settings will be copied.
37. Build phases
38. Linting 4 Shells out to xcodebuild
39. Alternatives
40. Makefiles
41. package: $(EXECUTABLE_NAME) $(INFO_PLIST) mkdir -p "$(PRODUCT_NAME).app" @/bin/echo -n 'AAPL' > "$(PRODUCT_NAME).app/PkgInfo" @$(PLBUDDY) -c 'Print CFBundleSignature' $(INFO_PLIST) \ >> "$(PRODUCT_NAME).app/PkgInfo" cp $(EXECUTABLE_NAME) "$(PRODUCT_NAME).app" $(BASE_DIR)/sh/build_plist $(INFO_PLIST) "$(PRODUCT_NAME).app/Info.plist" $(BASE_DIR)/sh/build_ipa "$(PRODUCT_NAME).app" $(EXECUTABLE_NAME): $(OBJS) $(LD) $(CFLAGS) $(LDFLAGS) -o $@ $^
42. Makefiles 4 Build rules to transform files (e.g. .m => .o) 4 Based on mtimes 4 "Phony" rules which run unconditionally 4 Dependencies to files or other rules 4 Exists everywhere
43. Rules target: dependencies build step(s)
44. Execution make [options] [target1 target2 ...]
45. Buck
51. => no more DerivedData nonsense !
52. Installation $ brew update $ brew tap facebook/fb $ brew install --HEAD buck
53. Quickstart $ buck quickstart --type ios --dest-dir . [...] $ buck build demo_app_ios [...] $ ls buck-out/gen/ios/BuckDemoApp BuckDemoApp.app BuckDemoApp.dSYM
54. Initial build $ buck build demo_app_ios [...] [-] BUILDING...FINISHED 2.4s (8/8 JOBS, 8 UPDATED, 0.0% CACHE HITS) Subsequent builds $ buck build demo_app_ios [...] [-] BUILDING...FINISHED 0.0s (1/8 JOBS, 0 UPDATED)
55. Faster iterations
56. BUCK apple_binary( [...] ) xcode_project_config( name = 'Hello', src_target = ':Hello', action_config_names={'profile': 'Profile'} )
57. Source files srcs = [ 'Code/AppDelegate.m' 'Code/ViewController.m', 'Code/main.m', ],
58. Headers headers = [ 'Code/AppDelegate.h' 'Code/ViewController.h', ],
59. Linked frameworks frameworks = [ '$SDKROOT/System/Library/Frameworks/Foundation.framework', '$SDKROOT/System/Library/Frameworks/UIKit.framework', ],
60. Dependencies deps = [ '//Libraries/EXExample:EXExample', ],
61. Buck does not support Swift !
62. Plan
63. Plan 4 Prototype with plugins ! 4 Abstraction for the build system 4 Mapping for build settings (*_xcconfig attributes) 4 ??? 4 Profit!
64. Add a new platform
65. Adding a new platform (tvos)
66. Gemfile source 'https://rubygems.org' gem 'cocoapods', :git => 'https://github.com/CocoaPods/CocoaPods.git', :branch => 'tvos' gem 'cocoapods-core', :git => 'https://github.com/CocoaPods/Core.git', :branch => 'tvos-support' gem 'xcodeproj', :git => 'https://github.com/CocoaPods/Xcodeproj.git', :branch => 'tvos-support' Usage: $ bundle exec pod install
67. Xcode is a leaky abstraction, try to learn what's underneath it.
68. Thanks!
69. https://www.facebook.com/events/ 1495505997428211/ _ @NeoNacho boris@contentful.com http://buegling.com/talks