The implementation is well-executed and follows established patterns in the arkade codebase. The changes correctly add direnv as a new downloadable tool with proper cross-platform support. The URL template handles the various OS/architecture combinations appropriately, and the test coverage includes the most commonly used platforms. The README update ensures users can discover the new tool. No regressions or migration concerns identified. The code is consistent with existing tool definitions and maintains the project's standards for security and reliability.

pkg/get/tools.go

• Correctness: The Tool struct is properly defined with all required fields (Owner, Repo, Name, Description, BinaryTemplate, URLTemplate). The URLTemplate correctly uses Go template syntax to construct download URLs for different platforms.
• Platform Support: Covers linux (amd64, arm64, armv7l), darwin (amd64, arm64), and windows (amd64). The template logic uses appropriate target names that match the actual release assets from the direnv GitHub repository.
• Consistency: Follows the same pattern as other tools in the file, using similar template structures and field values.
• Security: Downloads from official GitHub releases, which is consistent with other tools and poses no additional security risks.
• Suggestion: Consider adding support for additional architectures like windows-arm64 if direnv releases support it, but this is not critical for the current implementation.

pkg/get/get_test.go

• Test Coverage: The Test_DownloadDirenv function includes test cases for the major platforms: linux (amd64/arm64), darwin (amd64/arm64), and windows (amd64). This covers the most commonly used combinations.
• Test Implementation: Uses the same test structure as other tool tests, verifying URL generation for each supported platform. The test version (v2.37.1) matches a real release.
• Completeness: The test cases align with the URLTemplate logic. However, it doesn't test the armv7l case for linux, which is supported in the template but not exercised in tests.
• Suggestion: Add a test case for linux armv7l to ensure complete coverage of the template logic.

README.md

• Documentation: Correctly adds direnv to the tools list with appropriate description and link. Updates the tool count from 178 to 179.
• Consistency: The description matches the one in the Tool struct. The formatting follows the existing table structure.
• Accuracy: The tool count is correctly updated to reflect the addition of one new tool.

General Observations

• Impact: This is a low-risk change that adds new functionality without affecting existing code paths. No migration required for existing users.
• Performance: No performance implications; URL generation is template-based and efficient.
• Testing: The PR includes both unit tests and manual testing across multiple platforms, as evidenced by the test output in the PR description.
• Potential Improvements:
  • The hardcoded version (v2.37.1) could be made configurable in the future, but this follows the pattern of other tools.
  • Consider adding windows-arm64 support if direnv releases binaries for it.
• Code Quality: The changes are clean, well-formatted, and follow Go conventions. No linting or style issues apparent.