This presentation explains the motivation behind a tool that not only generates code but injects chunks of code into an existing project

1. SumUp – A better way to get paid.
SumCLI
Toolbelt for developers

2. SumUp – A better way to get paid.
Rodrigo (Dylon) Lucas Mari Ana Trombeta Danilo Lima
Team

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Many thanks to:
Dan Rasmussen
Daniel Hillman

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Problems we want to solve

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“I have this idea and need to
create a component, but I don't
know where to start”
Daniel Klein, CEO of Sumup

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“How do I implement RabbitMQ in
Ruby?”
Daniel Klein, CEO of Sumup

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“I've heard about this Theseus, I
want to get in”
Daniel Klein, CEO of Sumup

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“I'd like to validate my code before
I push to GitHub”
Daniel Klein, CEO of Sumup

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SumCLI
Saves up time
generating repeated
code
Installs new services Manage infrastructure in
local development
1 2 3

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What we created

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sumcli new myapp
Creates a new project ready to
serve HTTP requests

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sumcli new myapp
Creates a new project ready to
serve HTTP requests

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sumcli new myapp
Creates a new project ready to
serve HTTP requests

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sumcli new myapp
Creates a new project ready to
serve HTTP requests

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sumcli new myapp
Creates a new project ready to
serve HTTP requests

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sumcli start
Start serving requests

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sumcli start
Start serving requests

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sumcli add
Create a new class or injects
block of code

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sumcli add
Create a new class or injects
block of code

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sumcli add endpoint
Create a new class or injects
block of code

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sumcli add endpoint
Create a new class or injects
block of code

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sumcli add endpoint
Create a new class or injects
block of code

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sumcli add endpoint
hackathon get ':id'
Create a new class or injects
block of code

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sumcli add endpoint
hackathon post 'new'
Create a new class or injects
block of code

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sumcli add endpoint
hackathon post 'new'
Create a new class or injects
block of code

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sumcli add endpoint
Create a new class or injects
block of code

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sumcli add endpoint
Create a new class or injects
block of code

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
rabbitmq
Installs infrastructure
components and their initializers

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sumcli add service
postgres
Installs infrastructure
components and their initializers

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sumcli add service
postgres
Installs infrastructure
components and their initializers

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sumcli add migration
Creates new migration for
database

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sumcli add migration
Creates new migration for
database

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Next steps

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01 02 03
Add integration tests support
so QAs can use it as well
sumcli add cucumber
my_integration_test
Handle a stack other than
ruby
sumcli use nodejs
sumcli use elixir
Add as many services as
possible
sumcli add service sidekiq
sumcli add service sentry
sumcli add service redis
sumcli add service audit

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01 02 03
Handle a stack other than
ruby
sumcli use nodejs
sumcli use elixir
Add as many services as
possible
sumcli add service sidekiq
sumcli add service sentry
sumcli add service redis
sumcli add service audit
Add integration tests support
so QAs can use it as well
sumcli add cucumber
my_integration_test

44. SumUp – A better way to get paid.
01 02 03
Add integration tests support
so QAs can use it as well
sumcli add cucumber
my_integration_test
Handle a stack other than
ruby
sumcli use nodejs
sumcli use elixir
Add as many services as
possible
sumcli add service sidekiq
sumcli add service sentry
sumcli add service redis
sumcli add service audit
sumcli add service kafka

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DALE!