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computer-playbook/roles/sys-util-git-pull
kevinveenbirkenbachandClaude Opus 4.8 674d26de3a feat(lint/role-readme): derive Credits author from meta author SPOT
Role README Credits now name galaxy_info.author (plain bold or wrapped
in a Markdown link), matched byte-for-byte against the role's own
meta/main.yml, instead of a hard-coded maintainer name. Regenerate all
245 role README Credits blocks to the new 'Implemented by ...' format.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-02 16:47:34 +02:00
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System Utility: Git Pull (Shallow & Pinned)

Description

This Ansible role provides a robust, reusable Git pull utility for system automation. It performs shallow clones or updates of Git repositories and optionally pins the working tree to a specific tag (e.g. stable) in a detached HEAD state.

The role is designed to solve common automation pitfalls such as:

  • conflicting local tags (would clobber existing tag)
  • detached HEAD updates
  • annotated vs. lightweight tags
  • reliable change detection for Ansible

Internally, the role delegates complex Git logic to a small, well-tested Python helper script, keeping the Ansible YAML concise and readable.


Overview

This role:

  • Ensures a repository exists at a given destination
  • Clones the repository shallowly if it does not exist
  • Updates an existing repository in a detached-safe manner
  • Optionally removes conflicting local tags before fetching
  • Optionally pins the checkout to a specific tag (e.g. stable)
  • Marks the Ansible task as changed if:
    • the repository was cloned
    • tags were removed
    • the pinned tag appeared for the first time
    • the pinned tag moved on the remote (optional)

Purpose

The purpose of this role is to provide a generic, reusable Git pull primitive for other roles in the Infinito.Nexus ecosystem.

Typical use cases include:

  • installing tools pinned to a stable tag
  • reproducible system deployments
  • CI/CD-friendly shallow clones
  • avoiding fragile inline Git shell logic in roles

Features

  • Shallow Clone & Update (--depth)
  • Detached-safe Branch Updates
  • Optional Tag Pinning (e.g. stable)
  • Annotated Tag Support (tag^{})
  • Local Tag Conflict Healing
  • Deterministic changed_when Semantics
  • Verbose Debug Logging (stderr-only)

Design Notes

  • All human-readable logs go to stderr
  • Machine-readable state (CHANGED=…) is written to stdout
  • This guarantees reliable changed_when behavior in Ansible
  • The Python helper is intentionally self-contained and unit-testable

Credits

Implemented by Kevin Veen-Birkenbach. Part of the Infinito.Nexus Project and maintained by Kevin Veen-Birkenbach. Licensed under the Infinito.Nexus Community License (Non-Commercial).