【iOS】【Flutter】Github Actionsを使用してipaファイルを手動署名でビルドする

# 証明書をBase64に変換（クリップボードにコピー）
base64 -i your_certificate.p12 | pbcopy

# プロビジョニングプロファイルをBase64に変換
base64 -i your_profile.mobileprovision | pbcopy

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>method</key>
    <string>app-store</string>
    <key>teamID</key>
    <string>YOUR_TEAM_ID</string>
    <key>signingStyle</key>
    <string>manual</string>
  　<key>provisioningProfiles</key>
    <dict>
      <key>YOUR_BUNDLE_ID</key>
      <string>PROVISIONING_PROFILE_NAME</string>
    </dict>
</dict>
</plist>

name: iOS IPA Build

on:
  workflow_dispatch:

jobs:
  build:
    runs-on: macos-latest

    steps:
      - uses: actions/checkout@v4

      - name: Set up Flutter
        uses: subosito/flutter-action@v2
        with:
          channel: stable
          flutter-version: "3.29.0"

      - name: Setup packages
        run: |
          flutter pub get
          dart run build_runner build -d

      - name: Install Apple certificate and provisioning profile
        env:
          IOS_CERTIFICATE_BASE64: ${{ secrets.IOS_CERTIFICATE_BASE64 }}
          IOS_CERTIFICATE_PASSWORD: ${{ secrets.IOS_CERTIFICATE_PASSWORD }}
          IOS_PROVISIONING_PROFILE_BASE64: ${{ secrets.IOS_PROVISIONING_PROFILE_BASE64 }}
          KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
        run: |
          # Create variables
          CERTIFICATE_PATH=$RUNNER_TEMP/build_certificate.p12
          PP_PATH=$RUNNER_TEMP/build_pp.mobileprovision
          KEYCHAIN_PATH=$RUNNER_TEMP/app-signing.keychain-db

          # Import certificate and provisioning profile from secrets
          echo -n "$IOS_CERTIFICATE_BASE64" | base64 --decode -o $CERTIFICATE_PATH
          echo -n "$IOS_PROVISIONING_PROFILE_BASE64" | base64 --decode -o $PP_PATH

          # Create temporary keychain
          security create-keychain -p "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
          security set-keychain-settings -lut 21600 $KEYCHAIN_PATH
          security unlock-keychain -p "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH

          # Import certificate to keychain
          security import $CERTIFICATE_PATH -P "$IOS_CERTIFICATE_PASSWORD" -A -t cert -f pkcs12 -k $KEYCHAIN_PATH
          security set-key-partition-list -S apple-tool:,apple: -k "$KEYCHAIN_PASSWORD" $KEYCHAIN_PATH
          security list-keychain -d user -s $KEYCHAIN_PATH

          # Apply provisioning profile
          mkdir -p ~/Library/MobileDevice/Provisioning\ Profiles
          cp $PP_PATH ~/Library/MobileDevice/Provisioning\ Profiles

      - name: Build IPA
        run: |
          flutter build ipa --export-options-plist ios/ExportOptions.plist

      - name: Upload IPA artifact
        uses: actions/upload-artifact@v4
        with:
          name: app.ipa
          path: build/ios/ipa/*.ipa
          retention-days: 30

      - name: Clean up keychain
        if: always()
        run: |
          security delete-keychain $RUNNER_TEMP/app-signing.keychain-db || true