Keith Smiley
@SmileyKeith
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devx @Modular , maintainer of @bazelbuild 's iOS support, creator of @MobileNativeFdn . LLVM & Swift contributor. Previously Principal Engineer @Lyft
Joined April 2008
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Got in our
@Zipcar
we've been driving for 3 days. It doesn't start. Call Zipcar and get told that the car can't access the internet so it won't start. The only option is to have a tow truck come and tow it to somewhere where it has internet.
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The things this laptop removes that I use:
- SD reader
- MagSafe
- USB
- Thunderbolt
- Escape
The things it adds:
- Easier way to type 💩
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Today I'm super excited to launch the Mobile Native Foundation! Its goal is to improve large scale mobile development. Learn more about it and how to get involved:
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Facebook's SDK constantly crashing on launch has really justified our position on SDKs
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The App Store connect API has some very specific errors:
{"status": "503", "code": "SERVICE_UNAVAILABLE_ERROR.DISABLED_FOR_WINTER_SHUTDOWN", "title": "Winter shutdown enabled.", "detail": "Winter shutdown in progress."}
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New as of git 2.15:
git diff --color-moved=zebra
To show moved lines different from adds/deletes. Set permanently with:
git config --global diff.colorMoved zebra
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For the past few weeks all Lyft apps in the App Store have been built entirely with Bazel
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Just discovered this glorious selector in the Xcode internals
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Ah so the real reason Apple engineers shipped this feature was to prove to their bosses that open offices are bad
Sitting next to the marketing folks in an open floor plan
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I am happy to no longer write Objective-C, but this new warning is great
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We just open sourced a library, primarily written by
@kastiglione
, for consuming Swift's index data. We're currently using it internally to discover unused code. Hopefully it lowers the barrier of entry for writing more powerful semantic analysis tools!
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I used to think yaml was the worst CI configuration language
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Very cool post about some deep Objective-C internals (via iOS Dev Weekly)
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People: TikTok is tracking you worse than any app ever!
Advertising SDK vendors:
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The new linker in Xcode 15 lives up to the hype! ~6s -> ~1.5s for our largest target.
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Since the picture didn't show up in my slides here's a fun photo of part of our Mac Mini CI setup
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After nearly 9 years(!) at Lyft I've decided to move on. I feel so lucky to have worked with so many great folks over the years on such a wide variety of awesome projects. I'm excited to take a few weeks off and then share what's next for me!
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Emacs no longer being bundled with macOS Catalina confirms once and for all that Vim is the superior editor
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I'm delighted to announce that it's my first week at
@Modular
! I'm so excited to work with such a strong team on some really hard problems! 🔥🚀
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Just released the Hopper plugin I wrote for demangling Swift symbols
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Reminder: most "crazy" technical decisions you see from the outside are made by engineers just like you, making fine decisions, under different constraints
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> Starting with Xcode 14, bitcode is no longer required for watchOS and tvOS applications, and the App Store no longer accepts bitcode submissions from Xcode 14.
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I'm excited to finally give a talk about our experience with Bazel for iOS!
Announcing Keith Smiley
@SmileyKeith
from
@lyft
. He will be speaking at
#BASwiftable
this November 🗣‼️
🎟 Don't forget to get your ticket
⚡️ Ask your local community for discounts!
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For our company’s hackathon the last 3 days I submitted 5 Swift PRs and 2 LLVM fixes. While they were all small it still feels pretty great.
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I added a security.plist to Lyft's apps this week. This is a nice standard.
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We just open sourced our JSON parsing library (just in case you need another)
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This week marked 4 extremely exciting and rewarding years for me at Lyft. I'm looking forward to the next 4.
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If anyone's interested here's the complete list of `simctl` subcommands (including the private ones)
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Me on Sunday: I can't wait to get back to work tomorrow and get some stuff done!
Me on Monday: *googles barista yearly salary*
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Here are another set of slides from a small meetup where
@kastiglione
and I talked in detail about Lyft's iOS infrastructure
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I wrote a small tool for recursively inspecting your binary's dynamic dependencies. I've found this useful trying to understand where specific library dependencies come from.
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I just posted my slides from
@baswiftable
(images included 😛). They may not be much use without the video though, coming soon!
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In Xcode 15 beta 2 SwiftUI re-exports the new Observation framework which hard breaks RxSwift because it defines its own Observable protocol 🙃
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1. Get fed up with how complex programming languages have gotten
2. Build your own simpler language
3. Continue adding features over time
4. goto 1
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Xcode 10 fixed image autocompletion showing up all the time!
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Over the past few years
@kastiglione
and I have been using a stacked-diffs style workflow with GitHub. I finally split this out of my dotfiles and pushed it to its own repo, complete with a detailed explainer
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I'm so excited for this launch. We've been working really hard to make this happen.
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Just pushed to LLVM master for the first time, pretty terrifying.
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Exciting times for the bazel + iOS / Swift community
The project I worked on for the longest time at Google (rules_apple) has officially switched to community maintenance with
@SmileyKeith
leading the effort. Really happy there's a concrete plan for OSS support for the rules. Lyft's investment in OSS is highly commendable!
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Periodic reminder that not everything we use has to be built by Apple. Even the things that are can have downsides like:
- slow evolution
- potential to be untouched for years
- limited flexibility
And in the meantime the community gives up on solving it ourselves
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I wrote a Hopper script to demangle swift names. Before and after:
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Found a workaround for building Swift static libraries (in frameworks) in Xcode:
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Turns out you can't trust your users' clocks:
So we wrote a Swift NTP library you can trust
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204: This class, UIBarItem, you've probably never thought about
Me: I think about how it doesn't inherit from UIButton every day of my life
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Here are the slides from the talk
@kastiglione
and I gave at BazelCon about our iOS bazel migration. Video coming soon!
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Just tagged the first release of Brisk, our macOS app for Radar. If iOS 6 web UI is holding you back, check it out!
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Xcode 9.3 beta 3 has a tool for parsing code coverage output!
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Slack is down, which means now thousands of people are getting actual work done without the constant interruption of a endless meeting.
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Fix Swift compile times with this one weird trick!
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This is a super exciting project for the community, with an awesome icon
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The hardest problem in computer science is making sure behavior no one knows about doesn't regress.
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OH: IB is a pure function that takes pain and generates XML
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Is there a “what’s new in Swift 5.5 if you have a realistic deployment target” article somewhere?
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If you're interested in Haskell style functional in Swift, you should look through the Kickstarter codebase
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Got sourcekit-lsp working in Vim with one of our SwiftPM projects. Jump to definitions and find references work amazingly well! I'm so excited to use this
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Got a SIM card in Singapore for $15 that came with 100GB of data. Meanwhile in the US I pay $100 a month for 4GB.
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I wrote a small CLI for changing the location in the iOS simulator
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Who is going to break it to the JavaScript developers that there are languages where types are first class citizens?
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I'm excited to be hosting the Apple Development with Bazel BoF session at BazelCon this year
Sign up here
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I wrote a quick post about how you can skip password entry for `sudo xcode-select` which can be very useful for CI machines
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I wrote a quick post about how to silence some of the iOS simulator's noisiest warnings 🙃
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Swift AST Explorer is a requirement to write anything using SwiftSyntax. Such a great tool!
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Started generating some Xcode projects using it's so nice to not have to worry about conflicts anymore
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`mkdir /tmp/xcode_build_timings` if you want to see some interesting and extremely specific timing info.
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Interesting new things in Xcode 9.3b1:
- SwiftCommandLine.framework, appears to be a Commander like framework
- ProvisioningProfileQLGenerator, a replacement for
- usr/bin/simtest, appears to be a utility for testing the simulator itself
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Early takeaways as a user of the iOS 13 beta:
- dark mode is great
- new share sheet is awesome, it saves multiple taps and some typing for me every time
- swipe keyboard is great, switching back and forth with third party keyboards was always weird
- it has been stable
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Seems like someone accidentally shipped their testing frameworks in the Apple Store’s
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defaults write com.apple.dt.xcodebuild CommandLineBuildTimingLogLevel -int 5
Have fun!
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I wrote a small CLI for those times you want to extract libraries from the dyld shared cache but don't want to build dyld itself (or want it to support beta OS versions)
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I'm sad to see Dave leave, but I'm exited to cc him on all my radars
Next week I join the debugging team at . I really really like lldb. Be prepared for more debugging tweets 😂
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Interviews: please invert a binary tree
Actual work:
So, there was a library called Javaslang, now its "Vavr"
It had a class named "λ".
Obviously, our build fails with this:
```
java.nio.file.InvalidPathException:
Malformed input or input contains unmappable characters: javaslang/λ.class.Rule
```
just kill me already
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Woo! Static libraries with Swift sources is now supported with XCBuild!! Thanks
@daniel_dunbar
and team!
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Great feature, only install the platforms you need in Xcode!
Fast internet+M1 Pro+unxip+SIP disabled 💪
Say hello to Xcode 14!
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Interesting to see SwiftNIO and SwiftGRPC drop support for CocoaPods
I wonder if other projects will follow because of this precedent, or if the community will continue to maintain the podspecs.
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