SwiftWasm 5.5 release

[MaxDesiatov]

Here's a preliminary list of things that we'd probably want to see completed for the release:

• Fix SwiftPM resources broken in 5.5 Fix generateResourceAccessor WASI regression swiftlang/swift-package-manager#3819
• Update carton for SwiftWasm 5.5 Update dependencies, add support for SwiftWasm 5.5 carton#263
• Try to implement some async/await APIs from fresh SwiftUI in Tokamak with a JSKit version from the point above to give it more exposure and testing.
• Set up at least one build agent for Linux on ARM64 for toolchain/SDK builds. I guess Amazon Linux is the easiest one since AWS has ARM64 hosts. We could also set up Ubuntu 20.04 as well if we have capacity for that. Tracked separately as Provide builds for ARM64 Linux #1854
• How do we support actors? Do actor modifiers just become no-op modifiers, since everything is running on the main thread anyway?
• Make sure that async/await in JSKit is solid, see Support async/await and require Swift 5.5 JavaScriptKit#137
• Task.sleep(nanoseconds:) causes a crash after resuming #3646
• Linking executable target failed when swift-tools-version >= 5.5 #3645

@swiftwasm/toolchain-team WDYT? Anything else you think is required for a successful release? Do you think any of the points above are redundant and we should release ASAP as it is right now?

[kateinoigakukun]

IIRC, we need to cherry-pick my recent repairs of cooperative executor swiftlang#39365 swiftlang#39092
And also need to run test/Concurrency/Runtime test cases at least to ensure it works well.
If actor needs to be handled in wasm32 especially, some bugs will be found by the test cases.
(But as far as I understand, we don't need to handle them because only actor implementation (Actor.cpp) cares atomicity and job_enqueue procedure doesn't care it.)

[MaxDesiatov]

Thanks, I'm doing that in #3606

[cohix]

@MaxDesiatov what would be the easiest way for me to get a linux/ARM64 build? I'd like to experiment with my own ARM Docker images, as it's become a big blocker for my team.

(Happy to contribute back anything we do, of course!)

[MaxDesiatov]

After you clone this repository, you can run this script like ./swift/utils/webassembly/ci.sh. This script only supports Ubuntu at the moment. There's also a separate Dockerfile for Amazon Linux. I don't think any of these were tested on ARM64 though.

[cohix]

@MaxDesiatov Thanks! I will do some experimenting soon.

[MaxDesiatov]

Found another issue in 5.5 (and potentially dev) snapshots, does not look like a blocker to me as I can work around it in carton by passing flags there #3891

[MaxDesiatov]

carton is now ready for SwiftWasm 5.5, PR is waiting for approval here swiftwasm/carton#263

[MaxDesiatov]

TWIMC, 5.5.0 distribution CI run started here https://github.com/swiftwasm/swift/runs/4301523678?check_suite_focus=true

[MaxDesiatov]

Looks like there's a bug in distribution scripts, where intermittently name of a distribution archive can have a certain timestamp, but the contents of it will have a timestamp for a previous day. I've triggered a new build in the 5.5 branch and I hope the newly produced distribution will be named correctly tomorrow. Will tag 5.5.0 off that new distribution of that snapshot then.

Debugging the script and fixing it may take just as much time as simple re-triggering I've done. But if it's borked again tomorrow, guess I'll have to investigate this thoroughly and fix it.

[MaxDesiatov]

New release is tagged: https://github.com/swiftwasm/swift/releases/tag/swift-wasm-5.5.0-RELEASE, I'll keep it marked as pre-release until Monday, 27th of November, when everyone in the US is back from Thanksgiving holidays, which potentially will give us more coverage/shares when we announce it. I imagine Twitter is pretty quiet right now. Also gives us more time to test and tag new versions of Tokamak and carton.

I got it tagged off wasm-5.5-SNAPSHOT-2021-11-16-a. Later snapshots have their macOS installers (at least those for arm64) seemingly corrupted, but there's little to no difference between wasm-5.5-SNAPSHOT-2021-11-16-a and later snapshots. For distribution script to work without changes I had to delete later 5.5 tags though.

Update: I deleted the tag to avoid confusion, macOS installer packages from this tag couldn't be installed due to notarization issues, see below for updates.

[MaxDesiatov]

ugh, too early to rejoice, this archive also looks corrupted 😢 https://github.com/swiftwasm/swift/releases/download/swift-wasm-5.5.0-RELEASE/swift-wasm-5.5.0-RELEASE-macos_arm64.pkg

Update: it's a macOS notarization issue, investigating

[MaxDesiatov]

The tag is back, it's working. Will be formally announced on Monday 29 Nov if no major issues are found.

[MaxDesiatov]

Closing as released. We didn't get Linux arm64 builds yet, but it's tracked in a separate issue now. Release announcement is now published on our blog.