GLV OnAir Ottobre 2019 In questa introduzione a GitHub Actions: vedremo gli elementi base, cosa è possibile fare, cosa invece si rivela complicato o impossibile da fare, come trovare informazioni ed esempi.

1. On-Air 8 Ottobre 2019
Introduzione a GitHub Actions – Giulio Vian

2. Agenda
Cosa è GitHub Actions
Come si presenta
Dove si colloca

3. Cos’è

4. Motore di build
The Linux and Windows GitHub Actions virtual environments
are hosted on Standard_DS2_v2 virtual machines in Microsoft
Azure with the GitHub Actions runner installed. The GitHub
Actions runner is a fork of the Azure Pipelines Agent.

5. Piattaforme (“Virtual environments”)
Windows Server 2019
Windows Server 2016 R2
Ubuntu 18.04
Ubuntu 16.04
macOS X Mojave 10.14
oppure un container di vostra scelta

6. Linguaggi e tool
Android SDK
clang
.Net Core
.Net 4.x*
Erlang
GNU C++
Go
Haskell
Java (OpenJDK)
Mono
Node.js
PHP
Python
Ruby
rust
Scala
TypeScript
Ansible
Azure CLI
AWS CLI
Chocolatey*
Docker
helm
Heroku
kubectl
Terraform
Zeit Now
Ant
Bower
CMake
Git
GitVersion*
Gradle
Grunt
Gulp
Maven
Mercurial
Miniconda
n
Parcel
Subversion
Visual Studio*
Webpack
Wix*
Xcode*
Yarn
Firefox
Google Chrome
7-Zip
ImageMagick
MinGW*
MySQL
Pollinate
Powershell Core
Sphinx
SQL Server Client
* Only specific hosts

8. C’è roba vecchia in giro
On September 30, 2019, GitHub Actions will stop
running workflows written in HCL.

9. Cosa sembra?

10. New URL / Tab

11. Yet Another YAML
.github/workflows/hello-world.yml
name: Hello World
on: [push]
jobs:
build:
runs-on: ubuntu-latest
steps:
- run: echo "Hello World!"

12. Yet Another YAML
.github/workflows/hello-world.yml
name: Hello World
on: [push, pull_request]
jobs:
build:
runs-on: ubuntu-latest
steps:
- run: echo "Hello World!"

13. Tre briganti e tre somari
run:
uses: docker://
uses:

14. Run action
Esegue i comandi
Nella shell desiderata
PowerShell 6 è disponibile su ogni piattaforma
Molti tool son specifici per la piattaforma

15. Run action example
- env:
PACKAGE: mypackage
shell: pwsh
run: |
dotnet publish --output ${GITHUB_WORKSPACE}/out myproj.csproj
Compress-Archive ${GITHUB_WORKSPACE}/out/* `
-DestinationPath ${GITHUB_WORKSPACE}/${PACKAGE}.zip

16. Run action example
- env:
PACKAGE: mypackage
shell: pwsh
run: |
dotnet publish --output ${GITHUB_WORKSPACE}/out myproj.csproj
Compress-Archive ${GITHUB_WORKSPACE}/out/* `
-DestinationPath ${GITHUB_WORKSPACE}/${PACKAGE}.zip
⟪linea vuota qui⟫

17. Docker action
Per ora solo Linux
Lancia il container (docker run)
Monta la radice del repo in /github/workspace
Immagine da Registry pubblico
Potenzialmente lento

18. Docker action example
- name: Update AssemblyInfo files
uses: docker://gittools/gitversion:5.0.2-linux
with:
args: '-updateassemblyinfo -nocache -output buildserver'

19. Docker action example
- name: Update AssemblyInfo files
uses: docker://gittools/gitversion:5.0.2-linux
with:
args: '-updateassemblyinfo -nocache -output buildserver'

20. User action
JavaScript (Node.js 12)
Stesso o altro repo pubblico
github.com/actions
Non c’è ancora un catalogo organizzato
Automatizzare il lavoro in GitHub (issues, PRs)
Cloud (AWS, Azure, GCP, Heroku, …)

21. Uses action
- uses: actions/checkout@v1

22. Uses action
- uses: actions/checkout@v1

23. Environment variables
steps:
- name: Hello world
run: echo Hello world %FIRST_NAME% %middle_name%
%Last_Name%!
env:
FIRST_NAME: Mona
middle_name: The
Last_Name: Octocat

24. Environment variables
steps:
- name: Hello world
shell: pwsh
run: echo Hello world ${FIRST_NAME}
${middle_name} ${Last_Name}!
env:
FIRST_NAME: Mona
middle_name: The
Last_Name: Octocat

25. Environment variables
steps:
- name: Hello world
shell: bash
run: echo Hello world ${FIRST_NAME}
${middle_name} ${Last_Name}!
env:
FIRST_NAME: Mona
middle_name: The
Last_Name: Octocat

26. Environment variables
A livello di workflow o job o step
Per impostare via codice
echo ::set-env name={name}::{value}
Per mascherare valori
echo ::add-mask::{value}

27. Matrix
strategy:
matrix:
os: [macOS-10.14, windows-2016, ubuntu-18.04]
node: [4, 6, 8, 10]
exclude:
- os: macos-10.14
node: 4
steps:
- uses: actions/setup-node@v1
with:
node-version: ${{ matrix.node }}

28. Matrix
strategy:
fail-fast: false
matrix:
os: [macOS-10.14, windows-2016, ubuntu-18.04]
node: [4, 6, 8, 10]
exclude:
- os: macos-10.14
node: 4
timeout-minutes: 30
name: MyJob on ${{ matrix.os }} ${{ matrix.node }}
steps:
- uses: actions/setup-node@v1
with:
node-version: ${{ matrix.node }}

29. Run a workflow
aka Build

30. Collocazione

31. Continuous Integration per OSS
Progetti “semplici”
Build “semplici”
Rilasci “semplici”

32. Costi

33. Bugiardino
Exceeding usage limits may result in jobs
queueing, failing to run, or failing to complete.
Limits are subject to change.
You can execute up to 20 workflows
concurrently per repository.
You can execute up to 1000 API requests in an
hour across all actions within a repository.
Each job in a workflow can run for up to 6 hours
of execution time.
You can run up to 20 jobs concurrently per
repository across all workflows.

34. Scenari secondari
Automatizzare GitHub
Chiudere vecchi Issue o PR
Etichettare automaticamente nuovi issue
Annunci Post-release
Automatizzare documentazione

35. Links
https://help.github.com/en/categories/automating-your-
workflow-with-github-actions
https://github.com/actions
https://github.community/t5/GitHub-Actions/bd-
p/actions
https://abelsquidhead.com/index.php/2019/09/07/writin
g-my-first-custom-github-action/
https://www.slideshare.net/giuliov

37. Bio in pictures
37
giulio.dev@casavian.eu
@giulio_vian
https://www.slideshare.net/giuliov
https://tfsaggregator.github.io
http://blog.casavian.eu/
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