This is a lightning talk from Codemobile 2017 in Chester, UK on Automating Feature Branch Builds on iOS and Android Video of this talk: https://www.youtube.com/watch?list=PLmEZjI7vcqERys79KTTcWQHEb-Kj0zman&v=S8m1ulvtfrw

1. Quernus
Automated Feature
Branch Builds on iOS
Matt Hamilton
matt@quernus.co.uk
@hammertoe
Codemobile 19th April 2017

2. Who am I?
• 15 years as Technical
Director of web agency
• Python developer
• Now thrust into the world of
mobile
• Contractor, currently lead
of enquos mobile team

3. What is enquos?

4. iOS Build Process
• Long
• Arcane
• Requires variations
• Requires certificates / keys

5. Tools
Github
Fastlane / Gradle
Jenkins
Fabric Beta / Testflight
Slack

6. Fastlane
• Automates builds
• Allows multiple ‘lanes’ to be built
• Repeatable, scriptable builds
• An ‘API’ for iTunes Connect
• Takes the hassle out of the build and
deployment process

7. def do_build(scheme, configuration)
increment_build_number(
build_number: ENV['BUILD_ID']
)
profile =
'build/nutrition.mobileprovision'
if configuration == 'Release'
app_identifier =
'com.enquos.nutrition'
display_name =
'enquos nutrition'
set_istest_false
sigh(
app_identifier:
app_identifier,
filename: profile,
)
else
app_identifier =
'com.enquos.Nutrition.alpha.'
+ GIT_BRANCH_ID
display_name =
'enquos nutrition '
+ GIT_BRANCH
sigh(
app_identifier: '*',
adhoc: '1',
filename: profile,
)
end
update_info_plist(
app_identifier: app_identifier,
display_name: display_name,
plist_path:
'Nutrition/Info.plist',
xcodeproj:
'Nutrition/Nutrition.xcodeproj',
)
update_project_provisioning(
xcodeproj:
"Nutrition/Nutrition.xcodeproj",
build_configuration_filter:
".*Nutrition.*",
profile: profile,
)
ipa(
scheme: scheme,
configuration: configuration,
embed: profile,
xcargs:
'-derivedDataPath ./build',
)
end

8. Jenkins
• Monitors Github and builds a new
app when it sees a change
• Has separate jobs for:
• develop/
• feature/
• store

13. Quernus
A Typical Flow

16. Gotchas
• Need to change the App ID for watch app /
extensions too.
• Originally we used completely dynamic app ids,
but gets messy with 3rd party APIs (e.g.
Facebook) that need to know App ID in advance

17. Quernus
Thanks
Matt Hamilton
matt@quernus.co.uk
@hammertoe