Using Git Hooks to Help Your 40 40 40 Joo Santos Engineering - - PowerPoint PPT Presentation

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Using Git Hooks to Help Your 40 40 40 Joo Santos Engineering - - PowerPoint PPT Presentation

Dec 25, 2022 110 likes •511 views

255 105 0 149 149 149 225 225 225 68 84 106 84 28 0 0 0 153 65 0 102 Using Git Hooks to Help Your 40 40 40 Joo Santos Engineering Teams Work Software Engineer joao.santos@zalando.de Autonomously @joaomcsantos Europython 2015

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Using Git Hooks to Help Your Engineering Teams Work Autonomously

Europython 2015 João Santos Software Engineer joao.santos@zalando.de @joaomcsantos

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Quick Facts About Zalando Tech

  • Tech HQ in Berlin
  • Other tech offices in Dublin, Helsinki, Dortmund,

Mönchengladbach, Erfurt

  • +700 technologists
  • Nearly everything produced in-house
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Why?

Why do we need hooks and rules?

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How?

How should the rules be enforced?

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Dark Ages of SVN

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Dark Ages of SVN

  • Bash script
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Dark Ages of SVN

  • Bash script
  • Python Hook
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The Age of the Git Hook

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The Age of the Git Hook - First Plan

  • A common code base for git and svn
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The Age of the Git Hook - First Plan

  • A common code base for git and svn
  • Pre-receive hook
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The Age of the Git Hook - First Feedback

  • Git is not SVN
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The Age of the Git Hook - First Feedback

  • Git is not SVN
  • People don't use Git the same way
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The Age of the Git Hook - Plan B

  • A dedicated hook for Git
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The Age of the Git Hook - Plan B

  • A dedicated hook for Git
  • Allow teams to tailor the hooks to their needs
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The Age of the Git Hook - Customization

"*playground-*": check_from: 9999-01-01T00:00 TEAM1/*: check_from: 2014-01-08T00:00 allowed_projects: [PROJECT1] extra_on_push: [jira.fix_version] merge_to_feature: [live, master] TEAM1/repository42: allowed_projects: [PROJECT1, PROJECT2] TEAM2/*: allowed_projects: [PROJECT3] check_from: 2014-03-31T12:30 disable_on_push: [git.is_feature_or_bugfix_branch]

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The Age of the Git Hook - Problems

  • Centralized configuration
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The Age of the Git Hook - Problems

  • Centralized configuration
  • Trying to check commits on a push
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The Age of the Git Hook - Problems

  • Centralized configuration
  • Trying to check commits on a push
  • 1. Git history is not linear
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The Age of the Git Hook - Problems

  • Centralized configuration
  • Trying to check commits on a push
  • 1. Git history is not linear
  • 2. Merging to/from a long lived branch
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The Age of the Git Hook - Problems

  • Centralized configuration
  • Trying to check commits on a push
  • 1. Git history is not linear
  • 2. Merging to/from a long lived branch
  • Checking code style is slow
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The Age of the Git Hook - Problems

  • Centralized configuration
  • Trying to check commits on a push
  • 1. Git history is not linear
  • 2. Merging to/from a long lived branch
  • Checking code style is slow
  • Inflexible
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The Age of the Git Hook - Problems

  • Centralizing Git
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The Age of Autonomy

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The Age of the Autonomy

  • Local git hooks
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The Age of the Autonomy

  • Local git hooks
  • Optional, a helper not a blocker
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The Age of the Autonomy

  • Local git hooks
  • Optional, a helper not a blocker
  • Extensible, one size doesn't fit all
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The Age of the Autonomy

  • Local git hooks
  • Optional, a helper not a blocker
  • Extensible, one size doesn't fit all
  • Open Source
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The Age of the Autonomy - Turnstile https://github.com/zalando/turnstile https://pypi.python.org/pypi/turnstile-core

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$ pip install turnstile-core Turnstile - How to install it

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Turnstile - How to use it

  • Add a .turnstile.yml file to your repository
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Turnstile - How to use it

  • Add a .turnstile.yml file to your repository

checks:

  • specification
  • branch-release
  • protect-master

specification: allowed_schemes: ['https'] branch-release: pattern: '^v(?:\d|\_|\.)+$'

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Turnstile - How to use it

  • Add a .turnstile.yml file to your repository
  • Install the hooks on your repository:

$ turnstile install

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Turnstile - More than a hook

  • Core subcommands:

○ config ○ install ○ remove ○ specification ○ upgrade ○ version

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Turnstile - Extending Turnstile

setup( name='turnstile-codevalidator', ... entry_points={ 'turnstile.commands': ['codevalidator = turnstile_cv.command'], 'turnstile.pre_commit': ['codevalidator = turnstile_cv.check']})

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Turnstile - Extending Turnstile

  • Entry points

○ turnstile.commands ○ turnstile.commit_msg ○ turnstile.pre_commit

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What we learned

  • Don't get stuck in the past
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What we learned

  • Don't get stuck in the past
  • Develop in the open
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What we learned

  • Don't get stuck in the past
  • Develop in the open
  • Build tools not barriers
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Ask Questions

https://pypi.python.org/pypi/turnstile-core https://github.com/zalando/turnstile https://turnstile.readthedocs.org @joaomcsantos

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Where to Find Us:

Tech Blog: tech.zalando.com GitHub: github.com/zalando Twitter: @ZalandoTech Instagram: zalandotech Jobs: http://tech.zalando.com/jobs