npx runner is preferred over Swift even if the Swift runner is configured

[jmccance]

:wrench: Summary

When npx is available on the path, the hook scripts will never use the Swift runner.

This can be a problem if a developer has an incorrectly configured Node environment and is trying to commit to a Swift project configured with the SPM plugin.

Lefthook version

1.6.4

Steps to reproduce

1. Set up a project with a Package.swift file and the Swift lefthook-plugin.
2. Ensure that lefthook is not available through any of the fallbacks that come before npx.
3. Ensure that an executable called npx is available in your path. (For testing purposes, can do alias npx=false.)
4. Install a pre-commit hook.
5. Attempt to commit.

Expected results

The commit should complete successfully using the Swift Lefthook plugin.

Actual results

npx is used to try to run Lefthook.

Possible Solution

Re-order the fallbacks so the Swift test comes before the check for the npx command.

Logs / Screenshots

Not much to show here, since Lefthook never actually runs. What one of our engineers ran into, though, was that their broken Node environment resulted in this error when trying to commit to our Swift repo with Lefthook enabled.

[jmccance]

Looks like #653 would also be a possible solution if re-ordering the fallbacks isn't desired.

If it re-ordering is acceptable, let me know and I can open a PR.

[mrexox]

Thank you for creating an issue. I will release the fix this week

[jmccance]

Excellent, thanks!