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Ship your app on a
Friday
and enjoy your weekend
@POLPIELLADEV @[email protected] ! Do iOS 2024
/IN/POLPIELLADEV
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Indie developer and content creator based in Barcelona
Pol
Hi! I’m Pol
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polpiella.dev
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ioscinewsletter.com
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Mobile releases are
difficult
there is no denying that!
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Accurate representation of an iOS Engineer being
asked if they want to manage a release
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Mobile releases can be
risky. Let’s just not ship
them on a Friday.
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Gain confidence in your
releases and ship
anytime!
A few tips to…
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#1
Automate as
much as possible
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Fully automated
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desc "Distributes a new build to App Store Connect"
lane :distribute do
version_number = git_branch.split("/", -1).last
setup_ci
xcode_select("/Applications/Xcode_16.app")
sync_code_signing(
type: "appstore",
app_identifier: ["com.appdiggershq.fosi"],
readonly: true
)
increment_version_number(version_number: version_number, xcodeproj: "Fosi.xcodeproj")
app_store_connect_api_key(
key_id: ENV["APP_STORE_CONNECT_API_KEY_ID"],
issuer_id: ENV["APP_STORE_CONNECT_ISSUER_ID"],
key_content: ENV["APP_STORE_CONNECT_KEY_CONTENT"]
)
build_number = latest_testflight_build_number + 1
increment_build_number(xcodeproj: "Fosi.xcodeproj", build_number: build_number)
build_app(scheme: "Fosi", configuration: 'Release', output_name: "Fosi.ipa")
upload_to_app_store(ipa: "Fosi.ipa", precheck_include_in_app_purchases: false)
if !git_status(path: "Fosi.xcodeproj/project.pbxproj").empty?
git_commit(path: "Fosi.xcodeproj/project.pbxproj", message: "[ci skip] [" release] Updating version")
push_to_git_remote(remote: "origin", remote_branch: git_branch)
end
end
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name: Distribute to the App Store Connect
concurrency:
group: $!" github.workflow !#-$!" github.ref !#
cancel-in-progress: true
permissions:
contents: write
on:
push:
branches:
- 'release!!$'
jobs:
distribute:
runs-on: [macos-14]
steps:
- uses: actions/checkout@v4
- uses: ruby/setup-ruby@v1
with:
bundler-cache: true
- run: bundle exec fastlane distribute
env:
APP_STORE_CONNECT_API_KEY_ID: $!" secrets.APP_STORE_CONNECT_API_KEY_ID !#
APP_STORE_CONNECT_ISSUER_ID: $!" secrets.APP_STORE_CONNECT_ISSUER_ID !#
APP_STORE_CONNECT_KEY_CONTENT: $!" secrets.APP_STORE_CONNECT_KEY_CONTENT !#
MATCH_GIT_BASIC_AUTHORIZATION: $!" secrets.MATCH_GIT_BASIC_AUTHORIZATION !#
MATCH_USERNAME: $!" secrets.MATCH_USERNAME !#
MATCH_PASSWORD: $!" secrets.MATCH_PASSWORD !#
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A comprehensive test
suite will drastically
improve confidence
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A comprehensive test
suite will drastically
improve confidence*
If you actually remember to run them!
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Where should you run tests?
PRs to the
development
branch
Before
uploading to
ASC
On Nightly or
Scheduled
Workflows
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If there is a manual
task that causes
friction, automate it!
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#2
Test your release
pipeline
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#
App Target
$
ModuleA.framework
$
ModuleB.framework
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$
ModuleA.framework
$
ModuleB.framework
#
App Target
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lane :nightly do
# Let's make some magic happen %
gym(
project: "./AwesomeApp.xcodeproj",
clean: true,
derived_data_path: "./derived-data",
output_directory: "./build",
output_name: "AwesomeApp.ipa",
scheme: "AwesomeApp",
export_options: {
provisioningProfiles: {
"your.bundle.identifier" !% "Your Provisioning Profile Name",
}
}
)
deliver(
ipa: "build/AwesomeApp.ipa",
verify_only: true
)
end
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name: Nightly
on:
schedule:
- cron: '0 0 * * *'
jobs:
nightly:
runs-on: macos-latest
steps:
- uses: actions/checkout@v2
- name: Run nightly lane
run: bundle exec fastlane nightly
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#3
Adopt a release
strategy
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Quality matters WAY
MORE than quantity
The silver bullet of release frequency
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Release less, more
o!en*!
Use release trains to…
*Always allowing ample time for beta testing and QA
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You’ll unleash these benefits
&
Reduced risk
'
Predictability
(
Faster Feedback
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#4
Use
Feature Toggles
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You can just turn it off!
If something goes wrong in production…
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enum ToggleableFeature: String {
case homeSwiftUIRefactor = "homeRefactor"
}
struct HomeViewWrapper: View {
@Environment(FeatureToggleService.self) var featureToggles
var body: some View {
if featureToggles.isOn(.homeSwiftUIRefactor) {
HomeView()
} else {
LegacyHomeView()
}
}
}
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#5
Observe and
Monitor
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You first need to know
that one is happening!
To quickly react to an incident
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Crashes & Performance
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Crashes & Performance
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Crashes & Performance
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Analytics
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Customer Satisfaction
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Customer Satisfaction
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User Feedback
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User Feedback
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User Feedback
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CI/CD Velocity Metrics
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#6
Do not release to
all users at once
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import AWSLambdaRuntime
import AWSLambdaEvents
import AppStoreConnect_Swift_SDK
@main
struct PausePhasedReleaseWebhook: SimpleLambdaHandler {
func handle(_ event: APIGatewayV2Request, context: LambdaContext) async throws !& APIGatewayV2Response {
guard let body = event.body else { return .init(statusCode: .badRequest) }
!' Read the webhook payload and decide whehter to stop the release or not!!(
}
}
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func handle(_ event: APIGatewayV2Request, context: LambdaContext) async throws !& APIGatewayV2Response {
}
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func handle(_ event: APIGatewayV2Request, context: LambdaContext) async throws !& APIGatewayV2Response {
!' …
!' Get latest live version
let endpoint = APIEndpoint
.v1
.apps
.id("1234567890")
.appStoreVersions
.get(parameters: .init(filterPlatform: [.ios], filterAppVersionState: [.readyForDistribution]))
let response = try await provider.request(endpoint)
let allPhasedReleases = response.included?
.compactMap { item in
if case .appStoreVersionPhasedRelease(let phasedRelease) = item {
return phasedRelease
}
return nil
}
guard let id = allPhasedReleases!)first!)id else { return .init(statusCode: .notFound) }
}
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func handle(_ event: APIGatewayV2Request, context: LambdaContext) async throws !& APIGatewayV2Response {
!' …
let attributes = AppStoreVersionPhasedReleaseUpdateRequest.Data.Attributes(
phasedReleaseState: .paused
)
let data = AppStoreVersionPhasedReleaseUpdateRequest.Data(
type: .appStoreVersionPhasedReleases,
id: id,
attributes: attributes
)
let requestBody = AppStoreVersionPhasedReleaseUpdateRequest(data: data)
let phasedReleaseEndpoint = APIEndpoint
.v1
.appStoreVersionPhasedReleases
.id(id)
.patch(requestBody)
_ = try await provider.request(phasedReleaseEndpoint)
return .init(statusCode: .ok)
}
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*Things that are out of your control and fail oMen
*Your core business logic that your app depends on
#7
Move risky* logic
to the server!
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Ship bug fixes worldwide
for all versions of your
app
Within seconds…
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# Your App
• Risky logic
• Risky models
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$ Risky Models
# Your App
• Risky logic
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$ Risky Models
# Your App
⚙ Risky Logic (BE)
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#8
Roll back to a
stable version
immediately
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1.0.0
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1.0.0 1.0.1
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1.0.0
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1.0.0 1.0.1
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1.0.0 1.0.1 1.0.2
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1.0.0 1.0.2
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Gain confidence on
your release process!
Automate manual
processes
Use Feature
Toggles
Leverage the BE
ecosystem
Observe and Monitor
Ship less, more o!en!
Roll back to stable versions
of your app
How to use CI/CD to
ship your mobile apps
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And ship your apps on a
Friday… or anytime!
Gain confidence in your releases
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Find me online! Last tickets!