This commit adds a safety guard to create_ink() to prevent creation of
self-referential symlinks when the resolved command already lives at the
intended link target (e.g. ~/.local/bin/package-manager). Such a situation
previously resulted in broken shells with the error:
"zsh: too many levels of symbolic links"
Key changes:
- create_ink():
• Introduce early-abort guard when command == link_path
• Improve function signature and formatting
• Enhance alias creation messaging
- Added comprehensive unit tests under:
tests/unit/pkgmgr/core/command/test_ink.py
Tests cover:
• Self-referential command path → skip symlink creation
• Standard symlink + alias creation behaviour
This prevents pkgmgr from overwriting user-managed binaries inside ~/.local/bin
and ensures predictable, safe behaviour across all installer layers.
https://chatgpt.com/share/6938a43b-0eb8-800f-9545-6cb555ab406d
e335ab05a1