tfsort support

[jmreicha]

What problem are you facing?

Having a way to automatically sort variables inside variables.tf files would be a very useful check/lint for organizing and cleaning up Terraform codebases. I would be curious if there are others out there that face this issue and wonder if it would be worth adding support for a tool to do this.

How could pre-commit-terraform help solve your problem?

From the tfsort project:

tfsort is a command-line utility designed for meticulous engineers who prefer to keep their Terraform variables and outputs sorted in alphabetical order.

tfsort also corrects any spacing issues between the blocks and removes any leading or trailing new lines in the file.

The idea would be to have a hook to do this via pre-commit. Thoughts?

[MaxymVlasov]

Hmm, relates to #446?
And duplicates of #111

@jmreicha If you like to have that hook and it has some unique pluses compared with the suggested in #446 solution - feel free to implement tfsort or 446th hook. In CONTRIBUTING.md you will find things to start from

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