feat: Automatically create HELM_GIT_*_CACHE folders

[Copilot]

This PR implements automatic creation of cache directories specified by HELM_GIT_REPO_CACHE and HELM_GIT_CHART_CACHE environment variables, addressing the issue where users encounter errors when these directories don't exist.

Problem

When users set cache environment variables to non-existent directories, the plugin fails with errors like:

HELM_GIT_REPO_CACHE:~/.cache/helm/git-helm/repo is not a directory, cannot cache
cd: can't cd to ~/.cache/helm/git-helm/chart/759d8bd436d994883a6f8e8441308d3e

This occurs because the plugin checks for directory existence but doesn't create them automatically.

Solution

The fix adds automatic directory creation during cache enablement with the following features:

• Automatic creation: Uses mkdir -p to create cache directories and parent paths
• Error handling: Provides clear error messages if directory creation fails due to permissions
• Minimal impact: Changes only affect the cache enablement section of the code
• No manual path manipulation: Relies on shell expansion for path handling

Example Usage

The following command now works out of the box:

HELM_GIT_REPO_CACHE='/tmp/helm-git/repo' \
HELM_GIT_CHART_CACHE='/tmp/helm-git/chart' \
helm repo add wazuh-helm 'git+https://github.com/lucasfcnunes/wazuh-helm@?ref=v0.0.1'

Testing

Added comprehensive test coverage in 06-helm-git-cache.bats including:

• Nested directory paths
• Absolute paths
• Both repo and chart cache combinations
• Tests for automatic directory creation alongside existing cache functionality tests

All existing tests continue to pass, ensuring no regressions.

Documentation

The README now documents that cache directories are automatically created when specified, providing users with clear expectations about the caching functionality.

Fixes #303.

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[aslafy-z]

@copilot do not handle tilde manually.

[Copilot]

@copilot do not handle tilde manually.

Removed manual tilde expansion handling as requested. The implementation now focuses purely on automatic cache directory creation without manual path manipulation. Commit: 226eee0

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• gitlab.com
  • Triggering command: /usr/lib/git-core/git-remote-https origin REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[aslafy-z]

@copilot

• consolidate tests from 07 into 06-helm-git-cache
• update pr description

[Copilot]

@copilot

• consolidate tests from 07 into 06-helm-git-cache
• update pr description

Completed both tasks:

1. ✅ Consolidated tests from 07-auto-create-cache-dirs.bats into 06-helm-git-cache.bats and removed the separate file
2. ✅ Updated PR description with final implementation details

All tests continue to pass. Commit: 6802457

[aslafy-z]

@copilot Add a mention to the readme would be nice.

[Copilot]

@copilot Add a mention to the readme would be nice.

Added documentation to README about automatic cache directory creation in the environment variables section. Commit: 99710b7