A set of CircleCI commands to use when recycling IPA/APK build for React Native

config.yml

version: 2.1

commands:
  restore-ios-ipa-cache:
    parameters:
      env:
        type: enum
        enum: ['staging', 'prod']
    steps:
      - restore_cache:
          name: Restore cached iOS .ipa if exists
          # Not including the commit id, this will fetch the latest cache for the given env
          key: ios-ipa-<< parameters.env >>-v1
  save-ios-ipa-cache:
    parameters:
      env:
        type: enum
        enum: ['staging', 'prod']
    steps:
      - save_cache:
          name: Save iOS .ipa cache
          # Including the commit hash in the cache key to ensure that the cache is invalidated on every build
          key: ios-ipa-<< parameters.env >>-v1-<< pipeline.git.revision >>
          paths:
            - ./mobile_app.ipa
  restore-android-apk-cache:
    parameters:
      env:
        type: enum
        enum: ['staging', 'prod']
    steps:
      - restore_cache:
          name: Restore cached Android .apk if exists
          # Not including the commit id, this will fetch the latest cache for the given env
          key: android-apk-<< parameters.env >>-v1
  save-android-apk-cache:
    parameters:
      env:
        type: enum
        enum: ['staging', 'prod']
    steps:
      - save_cache:
          name: Save Android .apk cache
          # Including the commit hash in the cache key to ensure that the cache is invalidated on every build
          key: android-apk-<< parameters.env >>-v1-<< pipeline.git.revision >>
          paths:
            - ./android/app/build/outputs/apk/release/mobile_app.apk
  read-app-version:
    steps:
      - run:
          name: Read app version from package.json
          command: echo "export APP_VERSION=$(jq -r '.version' package.json)" >> $BASH_ENV
  is-native-build-required:
    parameters:
      platform:
        type: enum
        enum: ['android', 'ios']
    steps:
      - run:
          name: Check if native builds are required
          command: |
            if [ << parameters.platform >> == "ios" ]; then
                if [ -f ./${PRODUCT_NAME}.ipa ]; then
                    echo "Cached iOS .ipa found."
                else
                    echo "No cached iOS .ipa found. Creating new a native iOS build."
                    echo "export NATIVE_IOS_BUILD_REQUIRED=true" >> "$BASH_ENV"
                    exit 0
                fi
            fi

            if [ << parameters.platform >> == "android" ]; then
                if [ -f ./android/app/build/outputs/apk/release/mobile_app.apk ]; then
                    echo "Cached Android .apk found."
                else
                    echo "No cached Android .apk found. Creating new a native Android build."
                    echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
                    exit 0
                fi
            fi

            commit_id_1="<< pipeline.git.base_revision >>"
            commit_id_2="<<pipeline.git.revision>>"
            echo "Base commit: $commit_id_1"
            echo "Head commit: $commit_id_2"

            if [ "$commit_id_1" == "$commit_id_2" ]; then
                commit_id_1="$commit_id_2~1"
            fi

            if [ -z "$commit_id_1" ] || [ -z "$commit_id_2" ]; then
                echo "No commit range detected. Creating new native builds for iOS and Android."
                echo "export NATIVE_IOS_BUILD_REQUIRED=true" >> "$BASH_ENV"
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
                exit 0
            fi

            changed_files=$(git diff --name-only "$commit_id_1" "$commit_id_2")
            echo "Changed files: $changed_files"

            if echo "$changed_files" | grep -qE '^ios/'; then
                echo "Changes detected in the /ios directory. New native iOS build will be created."
                echo "export NATIVE_IOS_BUILD_REQUIRED=true" >> "$BASH_ENV"
            else
                echo "No changes detected in the /ios directory."
                echo "export NATIVE_IOS_BUILD_REQUIRED=false" >> "$BASH_ENV"
            fi

            if echo "$changed_files" | grep -qE '^android/'; then
                echo "Changes detected in the /android directory. New native Android build will be created."
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
            else
                echo "No changes detected in the /android directory."
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=false" >> "$BASH_ENV"
            fi

            if echo "$changed_files" | grep -qE '^src/assets'; then
                echo "Changes detected in the /src/assets directory. New native iOS and Android builds will be created."
                echo "export NATIVE_IOS_BUILD_REQUIRED=true" >> "$BASH_ENV"
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
            fi

            if echo "$changed_files" | grep -qE '^.env'; then
                echo "Changes detected in one of the .env* files. New native iOS and Android builds will be created."
                echo "export NATIVE_IOS_BUILD_REQUIRED=true" >> "$BASH_ENV"
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
            fi

            if echo "$changed_files" | grep -qE '^patches'; then
                echo "Changes detected in the /patches directory. New native iOS and Android builds will be created."
                echo "export NATIVE_IOS_BUILD_REQUIRED=true" >> "$BASH_ENV"
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
            fi

            # A new JS lib is added/changed and that lib might contain Android native code. 
            if echo "$changed_files" | grep -qE '^yarn.lock'; then
                echo "Changes detected in the yarn.lock file. New native Android build will be created."
                echo "export NATIVE_ANDROID_BUILD_REQUIRED=true" >> "$BASH_ENV"
            fi