Bringing CocoaPods to Linux NSSpain, September 2015 Boris Bügling - @NeoNacho 

CocoaPods dependency management ✅ 

Contentful content management ✅ 

Xcode? 

Agenda 4 Why? 4 Xcode's build system 4 How does CocoaPods interact with it? 4 Alternatives 4 Plan 

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No Xcode on Linux 

Xcode is broken 

ya tu sabes 

Quora Post from early 2014 

Just two examples 4 Archiving watchOS 2.0 apps 4 CLANG_ENABLE_MODULES 

[Xcode 7 beta] Linking dual (iphoneos and watchos) frameworks with same product name causes archive to fail http://openradar.appspot.com/22392501 

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CLANG_ENABLE_MODULES 

Enables the use of modules for system APIs. System headers are imported as semantic modules instead of raw headers. 

"system APIs" == any framework outside your target ! 

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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 

Solve everyday problems for Cocoa and Xcode developers. 

Let's face it, programming sucks. 

Xcode's build system 

4 Fairly old (Xcode3Core.ideplugin) 4 Entirely based on mtimes 4 Poorly documented 

De-facto documentation 4 http://pewpewthespells.com/blog/ managing_xcode.html 4 http://pewpewthespells.com/blog/ buildsettings.html 

Xcode project files !"# 

Tomorrow 16:30 - 17:00 Grant Paul - Making Sense of Xcode 

How does CocoaPods interact with it? 

4 Pods project 4 Integration into the user project 4 Linting 

Pods project 4 Generated by our Xcodeproj gem 4 Targets for all Pods 4 XCConfig files 

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 

Build settings 4 GCC_PREPROCESSOR_DEFINITIONS 4 HEADER_SEARCH_PATHS 4 OTHER_LDFLAGS 

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User project 4 Optional integration (--no-integrate) 4 Implicit target dependencies 4 XCConfig files 

Public XCConfig CONTENTFULDELIVERYAPI_OTHER_LDFLAGS = -framework "MapKit" -framework "UIKit" 

If you edit OTHER_LDFLAGS in your project, settings will be copied. 

Build phases 

Linting 4 Shells out to xcodebuild 

Alternatives 

Makefiles 

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 $@ $^ 

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 

Rules target: dependencies build step(s) 

Execution make [options] [target1 target2 ...] 

Buck 

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=> no more DerivedData nonsense ! 

Installation $ brew update $ brew tap facebook/fb $ brew install --HEAD buck 

Quickstart $ buck quickstart --type ios --dest-dir . [...] $ buck build demo_app_ios [...] $ ls buck-out/gen/ios/BuckDemoApp BuckDemoApp.app BuckDemoApp.dSYM 

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) 

Faster iterations 

BUCK apple_binary( [...] ) xcode_project_config( name = 'Hello', src_target = ':Hello', action_config_names={'profile': 'Profile'} ) 

Source files srcs = [ 'Code/AppDelegate.m' 'Code/ViewController.m', 'Code/main.m', ], 

Headers headers = [ 'Code/AppDelegate.h' 'Code/ViewController.h', ], 

Linked frameworks frameworks = [ '$SDKROOT/System/Library/Frameworks/Foundation.framework', '$SDKROOT/System/Library/Frameworks/UIKit.framework', ], 

Dependencies deps = [ '//Libraries/EXExample:EXExample', ], 

Buck does not support Swift ! 

Plan 

Plan 4 Prototype with plugins ! 4 Abstraction for the build system 4 Mapping for build settings (*_xcconfig attributes) 4 ??? 4 Profit! 

Add a new platform 

Adding a new platform (tvos) 

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 

Xcode is a leaky abstraction, try to learn what's underneath it. 

Thanks! 

https://www.facebook.com/events/ 1495505997428211/ _ @NeoNacho [email protected] http://buegling.com/talks