Setting Up Code Signing for iOS Projects
This document describes the guidelines for setting up code signing for your iOS or Mac project on CircleCI 2.0.
- Basic Configuration of iOS Projects
- Setting up Fastlane Match
- Sample Configuration Files
- Example Application on GitHub
Basic Configuration of iOS Projects
This document assumes that you already have an iOS or Mac project building
correctly on CircleCI 2.0. It also assumes that you use Bundle and
Fastlane, and have a
Fastfile checked into
Note: Setting up code signing on CircleCI 2.0 using Fastlane Match requires adding a User key to your CircleCI project. Setting up code signing is quite different than it was in CircleCI 1.0. The 2.0 documentation has been updated to reflect that the CircleCI app is not used, only the config instructions below are used for code signing in 2.0.
Note: If you would like to proceed without using Fastlane Match, this blog post provides an overview of how you can do this with CircleCI.
If you have not yet configured your iOS or Mac project on CircleCI 2.0, you can find the configuration instructions in the Testing iOS Applications on macOS document.
Setting up Fastlane Match
Code signing must be configured to generate ad-hoc distributions of your app and App Store builds.
Fastlane Match is one of the Fastlane tools, and it allows for seamless configuration on code signing in both the development environment and on CircleCI. Fastlane Match stores all of your code signing keys and provisioning profiles in a GitHub repository, and downloads and installs the necessary keys and profiles with a single command.
In the root of your repository, run
bundle exec fastlane match init
and follow the instructions to configure the Match repository. After configuration is complete, run
bundle exec fastlane match development to generate and
install the Development keys and profiles, and then run
fastlane match adhoc to generate and install the Ad-hoc distribution
keys and profiles.
Preparing Your Xcode Project for use With Fastlane Match
Before setting up Match you must ensure that the code signing settings in your Xcode project are configured as follows:
- Build Settings -> Code Signing Style is set to Manual
- Build Settings -> Development Team is set to your development team ID
Build Settings -> Code Signing Identity is set to:
- iOS Developer for the Debug configuration
- iOS Distribution for the Release configuration
In the target that you will be using for ad-hoc builds:
- Build Settings -> Provisioning Profile (Deprecated) is set to the Match AdHoc profile.
Adding Match to the Fastlane Lane
On CircleCI, Fastlane Match will need to be run every time you are going to generate an Ad-hoc build of your app. The easiest way to achieve that is to create a custom Fastlane lane just for that. It is best practice to create a Fastfile similar to the following:
fastlane match to work correctly, you must add
before_all in your
Fastfile. This ensures that a temporary Fastlane keychain is used.
# fastlane/Fastfile default_platform :ios platform :ios do before_all do setup_circle_ci end desc "Build and run tests" lane :test do scan end desc "Ad-hoc build" lane :adhoc do match(type: "adhoc") gym(export_method: "ad-hoc") end ... end
Adding a User key to the CircleCI Project
To enable Fastlane Match to download the certificates and the keys from GitHub, it is necessary to add a user key with access to both the project repo and the certificates / keys repo to the CircleCI project. In the project settings, navigate to Permissions -> Checkout SSH Keys -> Add user key and click Authorize with GitHub.
Note: This action will give the CircleCI project the same GitHub permissions as the user who will be clicking the Authorize with GitHub button.
git_url should be an SSH URL ( in the
firstname.lastname@example.org:... format), rather than a HTTPS URL. Otherwise you may see authentication errors when you attempt to use match. For example:
git_url("email@example.com:fastlane/certificates") app_identifier("tools.fastlane.app") username("firstname.lastname@example.org")
It is best practice to create a machine user with access to just the project repo and the keys repo, and use that machine user to create a user key to reduce the level of GitHub access granted to the CircleCI project.
After you have added a user key, CircleCI will be able to checkout both the project repo and the code signing certificates / keys repo from GitHub.
Adding the Match Passphrase to the Encrypted Environment Variables
To enable Fastlane Match to decrypt the keys and profiles stored in the GitHub repo, it is necessary to add the encryption passphrase that you configured in the Match setup step to the CircleCI project’s encrypted environment variables.
In the project settings on CircleCI, navigate to Build Settings ->
Environment Variables and add the
MATCH_PASSWORD variable, and set
its value to your encryption passphrase. The passphrase will be stored
encrypted at rest.
Invoking the Fastlane Test Lane on CircleCI
After you have configured Match and added its invocation into the Ad-hoc
lane, you can run that lane on CircleCI. The following
create an Ad-hoc build every time you push to the
# .circleci/config.yml version: 2 jobs: build-and-test: macos: xcode: 11.3.0 steps: # inc steps to complete build and test - run: bundle exec fastlane test adhoc: macos: xcode: 11.3.0 steps: # inc steps required to complete job - run: bundle exec fastlane adhoc workflows: version: 2 build-test-adhoc: jobs: - build-and-test - adhoc: filters: branches: only: development requires: - build-and-test
Sample Configuration Files
The best practice configuration for setting up code signing for iOS and Mac projects is as follows:
# fastlane/Fastfile default_platform :ios platform :ios do before_all do setup_circle_ci end desc "Runs all the tests" lane :test do scan end desc "Ad-hoc build" lane :adhoc do match(type: "adhoc") gym(export_method: "ad-hoc") end end
# .circleci/config.yml version: 2.1 jobs: build-and-test: macos: xcode: 11.3.0 environment: FL_OUTPUT_DIR: output FASTLANE_LANE: test steps: - checkout - run: bundle install - run: name: Fastlane command: bundle exec fastlane $FASTLANE_LANE - store_artifacts: path: output - store_test_results: path: output/scan adhoc: macos: xcode: 11.3.0 environment: FL_OUTPUT_DIR: output FASTLANE_LANE: adhoc steps: - checkout - run: bundle install - run: name: Fastlane command: bundle exec fastlane $FASTLANE_LANE - store_artifacts: path: output workflows: build-test-adhoc: jobs: - build-and-test - adhoc: filters: branches: only: development requires: - build-and-test
By setting the
FL_OUTPUT_DIR: env, that will tell Fastlane to output the XCode and Fastlane logs to that directory, so they get uploaded as artifacts for ease in troubleshooting.
Example Application on GitHub
circleci-demo-ios GitHub repository
for an example of how to configure code signing for iOS apps using
To read a blog post by Franz Busch at Sixt about their setup for CI with Fastlane and CircleCI, refer to the Continuous integration and delivery with fastlane and CircleCI blog post on Medium.