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Pol Piella Abadia - πMobile Devops Summit
-
10/11/2022
Getting ahead of the game:
Avoid Release day drama!
@polpielladev
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β’ π§π» Senior iOS Engineer @ BBC
iPlayer
β’ π From Barcelona
β’ π¬π§ Based in Manchester
β’ β€ Swift and developer tooling
β’ π Random fact: I collect football
shirts!
Hi, Iβm Pol π
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Letβs paint a picture
π₯ NutriFit
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Letβs paint a picture
Many new features since previous release
Built with UIKit.
New release includes first SwiftUI views
CI is all set up using fastlane
Modular
(
SPM & Xcode Projects) codebase
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What does the CI look like?
π§ͺ
β’ Triggered when a push to a PR occurs
β’ Runs Unit Tests
β’ Runs UI Tests
β’ Uses the Debug con
fi
guration of the App
β’ Performs code style checks
PR pipeline
π
β’ Manually triggered
β’ Bumps version
β’ Archives the app
β’ Uploads to the App Store
Release pipeline
π¨π»
β’ Triggered by every push to main
β’ Runs Unit Tests
β’ Runs UI Tests
β’ Uses the Debug con
fi
guration of the App
Main pipeline
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What does the CI look like?
π
β’ Manually triggered
β’ Bumps version
β’ Archives the app
β’ Uploads to the App Store
Release pipeline
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π Letβs release!
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π Letβs release!
Trigger pipeline
τ£
Bump version
τ£
Archive
τ³
Upload to ASC
τ
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An unusual archive error π
There is an error with the new SwiftUI View
No SwiftUI symbols are found
The solution is not obvious
Need to investigate further
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Letβs archive locallyβ¦
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No content
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Butβ¦
App targetβs minimum deployment version is 15
Xcode doesnβt build for armv7 when targeting iOS
>
11
TodayView is imported by the App Target
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Butβ¦
Source: https://developer.apple.com/forums/thread/690405
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// swift-tools-version: 5.6
import PackageDescription
let package = Package(
name: "TodayFeature",
targets: [
.target(
name: "TodayFeature"
),
.testTarget(
name: "TodayFeatureTests",
dependencies: ["TodayFeature"]
)
]
)
It was the package all alongβ¦
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// swift-tools-version: 5.6
import PackageDescription
let package = Package(
name: "TodayFeature",
platforms: [
.iOS(.v15)
],
targets: [
.target(
name: "TodayFeature"
),
.testTarget(
name: "TodayFeatureTests",
dependencies: ["TodayFeature"]
)
]
)
It was the package all alongβ¦
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π€Letβs try again!
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π€Letβs try again!
Trigger pipeline
τ£
Bump version
τ£
Upload to ASC
τ³
Archive
τ£
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Upload to ASC
τ³
Binary contains duplicated bundles.
This is related to a new framework called Schedule.
It is depended on by multiple other frameworks.
The error is due to the way Schedule is being imported.
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π±
Nutri
fi
t
π¦
Settings.framework
π¦
Streak.framework
Upload to ASC
τ³
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Upload to ASC
π¦
Settings.framework
π¦
Streak.framework
π±
Nutri
fi
t
τ³
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π€· One last time?
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π€· One last time?
Trigger pipeline
τ£
Bump version
τ£
Upload to ASC
τ³
Archive
τ£
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What now?! π
It looks like the version of Xcode in the CI is not supported
App was archived with Xcode 14 beta 2
A stable version of Xcode needs to be installed
The beta version was in the CI for testing.
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Source: https://developer.apple.com/download/applications/
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Source: https://giphy.com/gifs/hulu-hulu-original-moone-boy-l0HlBO7eyXzSZkJri
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π‘ Surely now!?
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π‘ Surely now!?
Trigger pipeline
τ£
Bump version
τ£
Archive
τ£
Upload to ASC
τ£
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Letβs recap our release
SwiftUI symbols could not be found on archive
Invalid version of Xcode
Same binary embedded multiple times
Source: https://giphy.com/gifs/this-is-
fi
ne-QMHoU66sBXqqLqYvGO
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π
Could we have caught this
early?
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π
Could we have caught this early?
We should periodically check processes that donβt happen often.
Scheduled workflows can be very helpful
Triggered at specific times using cron expressions
A good example are nightly CI runs
Certain workflows are time consuming and can cause disruption
Source: https://crontab.guru/#0_0_*_*_*
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Adding a new CI pipeline
π§ͺ
π
PR pipeline
π¨π»
Main pipeline
Release pipeline
π
Nightly pipeline
β’ Scheduled to run every night
β’ Can be achieved with most CI
providers
β’ Archives the app
β’ Validates the binary with App Store
Connect.
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π§π» Show me the code!
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π§π» Show me the code!
τΏ
The code in the following slides uses fastlane but the same result
can be achieved using other means, such as with a simple bash
script.
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lane :nightly do
# Let's make some magic happen πͺ
end
π§π» Show me the code!
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lane :nightly do
# Let's make some magic happen πͺ
gym(
project: "./NutriFit.xcodeproj",
clean: true,
derived_data_path: "./derived-data",
output_directory: "./build",
output_name: "NutriFit.ipa",
scheme: "NutriFit",
export_options: {
provisioningProfiles: {
"dev.polpiella.NutriFit" => "NutriFit App Store",
}
}
)
end
π§π» Show me the code!
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lane :nightly do
# Let's make some magic happen πͺ
gym(
project: "./NutriFit.xcodeproj",
clean: true,
derived_data_path: "./derived-data",
output_directory: "./build",
output_name: "NutriFit.ipa",
scheme: "NutriFit",
export_options: {
provisioningProfiles: {
"dev.polpiella.NutriFit" => "NutriFit App Store",
}
}
)
deliver(
ipa: "build/Nutrifit.ipa"
)
end
π§π» Show me the code!
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lane :nightly do
# Let's make some magic happen πͺ
gym(
project: "./NutriFit.xcodeproj",
clean: true,
derived_data_path: "./derived-data",
output_directory: "./build",
output_name: "NutriFit.ipa",
scheme: "NutriFit",
export_options: {
provisioningProfiles: {
"dev.polpiella.NutriFit" => "NutriFit App Store",
}
}
)
deliver(
ipa: "build/Nutrifit.ipa",
verify_only: true
)
end
π§π» Show me the code!
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fastlane nightly
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π§π» Letβs see it in action!
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No content
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π§ Want to learn a bit more?
Source: https://github.com/fastlane/fastlane/pull/20247
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π§ The output might look familiar
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π§ The output might look familiar
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π§ What else could we do?
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π§ What else could we do?
π
β’ List the number of modules in the app.
β’ Show the amount of legacy vs new code
(swift vs obj-c?)
Collect metrics
π§ͺ
β’ End 2 End tests
β’ Accessibility testing
β’ Any other βspecialisedβ long-running test
plans.
Run expensive tests
π§½
β’ Track the size of the IPA
β’ Vulnerability checks
β’ Unused code analysis - Feature Flags?
β’ Create dependency reports
Sanity checks
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When to use scheduled workflowsβ¦
1β£ Gaining con
fi
dence in processes which are very important but
donβt get run very often (e.g. release pipeline).
2β£ Performing useful tasks that are time consuming with minimal
disruption.
3β£ Automating repetitive tasks which always happen at a certain time
(once a week, twice a month, once a day, etc.)
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polpiella.dev
@polpielladev
Say hi! π