Extending Xcode - Speaker Deck

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EXTENDING XCODE MONITISE CREATE 2014 BORIS BÜGLING - @NEONACHO

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CONTENTFUL

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AGENDA ▸ Xcode ▸ Use plugins ▸ Develop your own plugin

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APPCODE? .

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XCODE

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Plugins!

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POSSIBILITIES ▸ Color Schemes ▸ File Templates ▸ Project Templates ▸ Plugins

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USE PLUGINS

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HOW DO I EVEN...

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@_supermarin

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ALCATRAZ The Xcode package manager http://alcatraz.io Marin, Delisa and Jurre

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curl -fsSL https://raw.github.com/supermarin/Alcatraz/master/ Scripts/install.sh | sh

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opens

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HOW DOES IT WORK? ▸ packages.json contains GitHub URL ▸ Clones the repository ▸ Runs xcodebuild with some parameters

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SOME COOL PLUGINS

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CLANGFORMAT

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FUZZYAUTOCOMPLETE

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KSIMAGENAMED

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OMCOLORSENSE

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POLYCHROMATIC

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SHOWINGITHUB

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VVDOCUMENTER-XCODE

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XCODE_BEGINNING_OF_LINE

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XCODECOLORS

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DEVELOP YOUR OWN PLUGIN

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GETTING STARTED ▸ Clone https://github.com/kattrali/Xcode5-Plugin-Template ▸ Put it into ~/Library/Developer/Xcode/Templates/Project Templates/Application Plug-in/Xcode5 Plugin.xctemplate

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PLUGIN TEMPLATE ▸ Xcode 5.1 compatible ▸ Shows a menu item for testing ▸ On build, plugin ends up here: ~/Library/Application Support/ Developer/Shared/Xcode/Plug-ins/ ▸ Just restart and it shows up

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ONCE YOU BUILD AND RESTART XCODE .

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LET'S BUILD SOMETHING USEFUL... .

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GENERAL POINTS

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COMPATIBILITY UUIDS THIS MIGHT APPEAR IN YOUR SYSTEM.LOG [MT] PluginLoading: Required plug-in compatibility UUID 640F884E-CE55-4B40-87C0-8869546CAB7A for plug-in at path '~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/CocoaPodsPlugIn.xcplugin' not present in DVTPlugInCompatibilityUUIDs $ defaults read /Applications/Xcode51-DP2.app/Contents/Info DVTPlugInCompatibilityUUID 640F884E-CE55-4B40-87C0-8869546CAB7A ADD THAT UUID TO YOUR PLUGIN'S INFO.PLIST

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THIS WILL HAPPEN ALL THE TIME

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YOUR ONLY FRIENDS... $ tail -f /var/log/system.log $ rm -rf ~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/* ▸ Debug from the command line with lldb... ▸ or with a second instance of Xcode

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HEADERS Use class-dump yourself, or just grab https://github.com/luisobo/Xcode5-RuntimeHeaders

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WHAT WE ARE LOOKING FOR ▸ How to detect if the user types in the editor? ▸ How to hide the debug pane?

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grep -ri editor *

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@interface IDEWorkspaceWindowController : NSWindowController [...] @property(readonly) IDEEditorArea *editorArea; [...] @end

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@interface IDEEditorArea : IDEViewController [...] - (void)toggleDebuggerVisibility:(id)arg1; - (void)activateConsole:(id)arg1; @property BOOL showDebuggerArea; [...] @end

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- (void)toggleDebuggersIfNeeded { for (NSWindowController *workspaceWindowController in [objc_getClass("IDEWorkspaceWindowController") workspaceWindowControllers]) { id editorArea = [workspaceWindowController editorArea]; if ([editorArea showDebuggerArea]) { [editorArea toggleDebuggerVisibility:nil]; } } }

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@interface NSObject (ShutUpWarnings) -(id)editorArea; -(BOOL)showDebuggerArea; -(void)toggleDebuggerVisibility:(id)arg; -(NSArray*)workspaceWindowControllers; @end

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GREPPING THROUGH _SUBTREEDESCRIPTION grep -i source * [ AF O P LU ] h=--- v=--- NSClipView 0x7f822e93e990 f=(35,0,885,662) b=(0,637,-,-) TIME drawRect: min/mean/max 0.00/0.00/0.00 ms [ AF O LU ] h=-&- v=-&- DVTSourceTextView 0x7f822c723f00 f=(0,0,885,1339) b=(-) TIME drawRect: min/mean/max 0.00/0.00/0.00 ms [ A LU ] h=--- v=--- DVTMessageBubbleView 0x7f822eb5c080 f=(638,975,247,12) b=(-) TIME drawRect: min/mean/max 0.23/0.42/0.68 ms

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DVTSourceTextView

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- (void)swizzleDidChangeTextInSourceTextView { [[objc_getClass("DVTSourceTextView") new] yl_swizzleSelector:@selector(didChangeText) withBlock:^void(id sself) { [self toggleDebuggersIfNeeded]; [sself yl_performSelector:@selector(didChangeText) returnAddress:NULL argumentAddresses:NULL]; }]; }

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@interface NSObject (YOLO) -(void)yl_performSelector:(SEL)aSelector returnAddress:(void *)result argumentAddresses:(void *)arg1, ...; -(void)yl_swizzleSelector:(SEL)originalSelector withBlock:(id)block; @end

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SHIP IT { "name": "My Life-Changing Xcode Plugin", "url": "https://github.com/me/xcode-life-changing-plugin", "description": "Makes Xcode stop, collaborate and listen." } Send a pull request to the Alcatraz packages repo https://github.com/supermarin/alcatraz-packages

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USING DTRACE ▸ Powerful dynamic tracing framework ▸ Can be used to log any objc_msgSend() ▸ Useful for seeing call trees of a specific class ▸ http://chen.do/blog/2013/10/22/reverse-engineering-xcode-with- dtrace/

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THANK YOU!

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https://github.com/kattrali/xcode-devtools https://coderwall.com/p/-mgtww https://github.com/neonichu/extending-xcode/ https://github.com/neonichu/BBUDebuggerTuckAway/ https://github.com/neonichu/BBUFullIssueNavigator/