Click-free releases & the making of a CLI app

Slide 1

Slide 1 text

Adam Ahmed - Senior Android Engineer at TravelPerk - @oheyadam Click-free releases & the making of a CLI app

Slide 2

Slide 2 text

Agenda

Slide 3

Slide 3 text

Agenda • Our release process

Slide 4

Slide 4 text

Agenda • Our release process • What does our CLI app do?

Slide 5

Slide 5 text

Agenda • Our release process • What does our CLI app do? • The making of a CLI app

Slide 6

Slide 6 text

Agenda • Our release process • What does our CLI app do? • The making of a CLI app • Build & distribution

Slide 7

Slide 7 text

Agenda • Our release process • What does our CLI app do? • The making of a CLI app • Build & distribution • Consuming it on Android

Slide 8

Slide 8 text

Agenda • Our release process • What does our CLI app do? • The making of a CLI app • Build & distribution • Consuming it on Android • Automating everything

Slide 9

Slide 9 text

What does our release process look like?

Slide 10

Slide 10 text

What does our release process look like? Preparation

Slide 11

Slide 11 text

What does our release process look like? Preparation • Increment version across apps

Slide 12

Slide 12 text

What does our release process look like? Preparation • Increment version across apps • Update database entries

Slide 13

Slide 13 text

What does our release process look like? Preparation • Increment version across apps • Update database entries • Notify stakeholders

Slide 14

Slide 14 text

What does our release process look like? Preparation QA

Slide 15

Slide 15 text

What does our release process look like? Preparation QA • Cut release branches

Slide 16

Slide 16 text

What does our release process look like? Preparation QA • Cut release branches • Pull latest strings

Slide 17

Slide 17 text

What does our release process look like? Preparation QA • Cut release branches • Pull latest strings • Create & distribute internal release builds to testers

Slide 18

Slide 18 text

What does our release process look like? Preparation QA • Cut release branches • Pull latest strings • Create & distribute internal release builds to testers • Update database entries

Slide 19

Slide 19 text

What does our release process look like? Preparation QA • Cut release branches • Pull latest strings • Create & distribute internal release builds to testers • Update database entries • Notify stakeholders

Slide 20

Slide 20 text

What does our release process look like? Rollout

Slide 21

Slide 21 text

What does our release process look like? Rollout • Staggered rollout

Slide 22

Slide 22 text

What does our release process look like? Rollout • Staggered rollout • Update database entries

Slide 23

Slide 23 text

What does our release process look like? Rollout • Staggered rollout • Update database entries • Notify stakeholders

Slide 24

Slide 24 text

What does our release process look like? Completion

Slide 25

Slide 25 text

What does our release process look like? Completion • Create a PR to merge our release branch back into main

Slide 26

Slide 26 text

What does our release process look like? Completion • Create a PR to merge our release branch back into main • Create release tags

Slide 27

Slide 27 text

What does our release process look like? Completion • Create a PR to merge our release branch back into main • Create release tags • Generate internal release notes

Slide 28

Slide 28 text

What does our release process look like? Completion • Create a PR to merge our release branch back into main • Create release tags • Generate internal release notes • Update database entries

Slide 29

Slide 29 text

What does our release process look like? Completion • Create a PR to merge our release branch back into main • Create release tags • Generate internal release notes • Update database entries • Notify stakeholders

Slide 30

Slide 30 text

Users receive our updates. Good times

Slide 31

Slide 31 text

That’s a lie. Hot fi xes exist Users receive our updates. Good times

Slide 32

Slide 32 text

Hot fi xes

Slide 33

Slide 33 text

• Same steps, albeit slightly accelerated Hot fi xes

Slide 34

Slide 34 text

• Same steps, albeit slightly accelerated • Extra decisions trees thrown in for good measure Hot fi xes

Slide 35

Slide 35 text

I hope you sensed a theme

Slide 36

Slide 36 text

Fastlane

Slide 37

Slide 37 text

Fastlane App automation done right

Slide 38

Slide 38 text

Fastlane App automation done right. Or is it?

Slide 39

Slide 39 text

Fastlane App automation done right. Or is it? • Written in Ruby

Slide 40

Slide 40 text

Fastlane App automation done right. Or is it? • Written in Ruby • We couldn’t iterate easily

Slide 41

Slide 41 text

Fastlane App automation done right. Or is it? • Written in Ruby • We couldn’t iterate easily • We couldn’t write tests for it

Slide 42

Slide 42 text

Fastlane App automation done right. Or is it? • Written in Ruby • We couldn’t iterate easily • We couldn’t write tests for it • Performed build-logic operations outside of our codebase

Slide 43

Slide 43 text

Fastlane App automation done right. Or is it? • Written in Ruby • We couldn’t iterate easily • We couldn’t write tests for it • Performed build-logic operations outside of our codebase • Needed to replicate the same Ruby environment across di ff erent hosts

Slide 44

Slide 44 text

Slide 45

Slide 45 text

We just weren’t able to iterate

Slide 46

Slide 46 text

Until we built Kronos We just weren’t able to iterate

Slide 47

Slide 47 text

Kronos

Slide 48

Slide 48 text

• Written entirely in Kotlin Kronos

Slide 49

Slide 49 text

• Written entirely in Kotlin • Distributed as CLI app Kronos

Slide 50

Slide 50 text

• Written entirely in Kotlin • Distributed as CLI app • Fully tested / testable Kronos

Slide 51

Slide 51 text

• Written entirely in Kotlin • Distributed as CLI app • Fully tested / testable • Allowed us to iterate Kronos

Slide 52

Slide 52 text

Iterate?

Slide 53

Slide 53 text

Improvements • Unit & integration tests for code paths we knew were brittle

Slide 54

Slide 54 text

Improvements • Unit & integration tests for code paths we knew were brittle • Our release process has state

Slide 55

Slide 55 text

Improvements • Unit & integration tests for code paths we knew were brittle • Our release process has state • Automatically generates internal release notes

Slide 56

Slide 56 text

Improvements • Unit & integration tests for code paths we knew were brittle • Our release process has state • Automatically generates internal release notes • Android releases are entirely automated

Slide 57

Slide 57 text

The making of a CLI app

Slide 58

Slide 58 text

The making of a CLI app • We just used Clikt!

Slide 59

Slide 59 text

The making of a CLI app • We just used Clikt! • Allowed us to represent CLI commands as classes

Slide 60

Slide 60 text

The making of a CLI app • We just used Clikt! • Allowed us to represent CLI commands as classes • …

Slide 61

Slide 61 text

The making of a CLI app • We just used Clikt! • Allowed us to represent CLI commands as classes • … • Pro fi t!

Slide 62

Slide 62 text

How do we build & distribute Kronos?

Slide 63

Slide 63 text

Build & Distribution • Ideally, we want this

Slide 64

Slide 64 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library

Slide 65

Slide 65 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library • Can Gradle help?

Slide 66

Slide 66 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library • Can Gradle help? • Uber-jars

Slide 67

Slide 67 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library • Can Gradle help? • Uber-jars • Publishing

Slide 68

Slide 68 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library • Can Gradle help? • Uber-jars • Publishing

Slide 69

Slide 69 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library • Can Gradle help? • Uber-jars • Publishing

Slide 70

Slide 70 text

Build & Distribution • Ideally, we want this • Kronos is just a JVM library • Can Gradle help? • Uber-jars • Publishing

Slide 71

Slide 71 text

Invoking it from the Android project

Slide 72

Slide 72 text

No content

Slide 73

Slide 73 text

No content

Slide 74

Slide 74 text

Invoking it from the Android project • Create a Gradle task

Slide 75

Slide 75 text

Invoking it from the Android project • Create a Gradle task

Slide 76

Slide 76 text

Invoking it from the Android project • Create a Gradle task • Add the dependency to your classpath

Slide 77

Slide 77 text

Invoking it from the Android project • Invoking this CLI • Add the dependency to your classpath

Slide 78

Slide 78 text

No content

Slide 79

Slide 79 text

Invoking it from the Android project • Invoking this CLI • Add the dependency to your classpath

Slide 80

Slide 80 text

Invoking it from the Android project • Invoking this CLI • Add the dependency to your classpath

Slide 81

Slide 81 text

Invoking it from the Android project • Invoking this CLI • Add the dependency to your classpath • Pro fi t!

Slide 82

Slide 82 text

Automating everything

Slide 83

Slide 83 text

Automating everything Zapier subscribes to Calendar events

Slide 84

Slide 84 text

Automating everything Zapier subscribes to Calendar events Zapier calls into CircleCI API

Slide 85

Slide 85 text

Automating everything Zapier subscribes to Calendar events Zapier calls into CircleCI API CCI spins up an instance, runs desired work fl ow

Slide 86

Slide 86 text

Automating everything Zapier subscribes to Calendar events Zapier calls into CircleCI API CCI spins up an instance, runs desired work fl Projects call into Kronos

Slide 87

Slide 87 text

Adam Ahmed - Senior Android Engineer at TravelPerk - @oheyadam Thanks! We’re hiring