Mobile DevOps Best Practices: CI/CD, Automation, and Release

1PR Opened
2  --> Lint (SwiftLint) [1 min]
3  --> Build (Debug) [5 min]
4  --> Unit Tests [3 min]
5  --> UI Tests [10 min]
6  --> Code Coverage [1 min]
7  --> PR Status Check
8 
9Main Branch Merge
10  --> Build (Release) [8 min]
11  --> Full Test Suite [15 min]
12  --> Archive [5 min]
13  --> TestFlight Upload [3 min]
14  --> Slack Notification
15 
16Release Tag
17  --> Clean Build [10 min]
18  --> Regression Tests [20 min]
19  --> Archive + Sign [5 min]
20  --> App Store Upload [3 min]
21  --> Release Notes

1# .github/workflows/ios-ci.yml
2name: iOS CI
3 
4on:
5  pull_request:
6    branches: [main, develop]
7  push:
8    branches: [main]
9 
10concurrency:
11  group: ios-ci-PR_NUMBER
12  cancel-in-progress: true
13 
14jobs:
15  lint:
16    runs-on: macos-14
17    steps:
18      - uses: actions/checkout@v4
19      - name: SwiftLint
20        run: |
21          brew install swiftlint
22          swiftlint lint --strict
23 
24  build-and-test:
25    needs: lint
26    runs-on: macos-14
27    steps:
28      - uses: actions/checkout@v4
29 
30      - name: Select Xcode
31        run: sudo xcode-select -s /Applications/Xcode_15.4.app
32 
33      - name: Cache SPM
34        uses: actions/cache@v4
35        with:
36          path: |
37            ~/Library/Caches/org.swift.swiftpm
38            .build
39          key: spm-HASH_OF_RESOLVED
40          restore-keys: spm-
41 
42      - name: Build
43        run: |
44          xcodebuild build-for-testing \
45            -scheme MyApp \
46            -destination 'platform=iOS Simulator,name=iPhone 15' \
47            -derivedDataPath DerivedData \
48            | xcpretty
49 
50      - name: Unit Tests
51        run: |
52          xcodebuild test-without-building \
53            -scheme MyApp \
54            -destination 'platform=iOS Simulator,name=iPhone 15' \
55            -derivedDataPath DerivedData \
56            -resultBundlePath TestResults \
57            | xcpretty
58 
59      - name: Upload Results
60        if: always()
61        uses: actions/upload-artifact@v4
62        with:
63          name: test-results
64          path: TestResults.xcresult

1// ci_scripts/ci_post_clone.sh
2#!/bin/bash
3 
4# SPM resolve
5xcodebuild -resolvePackageDependencies
6 
7# Environment variables
8# CI_PRODUCT -> product name
9# CI_BRANCH -> branch name
10# CI_COMMIT -> commit hash
11# CI_BUILD_NUMBER -> build number
12# CI_WORKFLOW -> workflow name
13 
14echo "Building branch: CI_BRANCH_VALUE"
15echo "Build number: CI_BUILD_NUMBER_VALUE"

1# Fastfile
2default_platform(:ios)
3 
4platform :ios do
5  desc "Run tests"
6  lane :test do
7    scan(
8      scheme: "MyApp",
9      devices: ["iPhone 15"],
10      code_coverage: true,
11      output_types: "html,junit",
12      clean: true
13    )
14  end
15 
16  desc "Beta deployment to TestFlight"
17  lane :beta do
18    # Increment build number
19    increment_build_number(
20      build_number: latest_testflight_build_number + 1
21    )
22 
23    # Build and archive
24    build_app(
25      scheme: "MyApp",
26      export_method: "app-store",
27      clean: true,
28      output_directory: "./build"
29    )
30 
31    # Upload to TestFlight
32    upload_to_testflight(
33      skip_waiting_for_build_processing: true,
34      changelog: "Bug fixes and improvements"
35    )
36 
37    # Slack notification
38    slack(
39      message: "New beta build uploaded to TestFlight!",
40      channel: "#ios-releases",
41      success: true
42    )
43  end
44 
45  desc "Release to App Store"
46  lane :release do
47    # Run tests
48    test
49 
50    # Take screenshots
51    snapshot
52 
53    # Build
54    build_app(
55      scheme: "MyApp",
56      export_method: "app-store"
57    )
58 
59    # Upload to App Store
60    upload_to_app_store(
61      force: true,
62      submit_for_review: true,
63      automatic_release: false,
64      submission_information: {
65        add_id_info_uses_idfa: false
66      }
67    )
68  end
69 
70  # On failure
71  error do |lane, exception|
72    slack(
73      message: "CI failed: lane_name",
74      channel: "#ios-alerts",
75      success: false
76    )
77  end
78end

1# Matchfile
2git_url("https://github.com/org/certificates")
3storage_mode("git")
4type("appstore")
5app_identifier(["com.company.app", "com.company.app.widget"])
6username("[email protected]")
7 
8# Usage:
9# fastlane match appstore    -> App Store certificates
10# fastlane match development -> Development certificates
11# fastlane match adhoc       -> Ad Hoc certificates

1         /  E2E  \        <- 10% (UI Test, slow)
2        /  Integration \   <- 20% (API, DB)
3       /   Unit Tests   \  <- 70% (Fast, many)