fix(terraform_docs): Suppress "terraform command not found" error message in case binary does not exist

[ponceps]

Put an x into the box if that apply:

• This PR introduces breaking change.
• This PR fixes a bug.
• This PR adds new functionality.
• This PR enhances existing functionality.

Description of your changes

If you are using OpenTofu and don't have Terraform binary installed, terraform_docs hook will display a command not found error. The error line checks if Terraform release is 0.12, so it's possible suppress this error message if Terraform binary doesn't exist.

How can we test changes

Below are the steps to reproduce the error.

1. Install OpenTofu
2. Uninstall Terraform (or remove it from PATH)
3. Make any changes to variables.tf or outputs.tf
4. Run pre-commit -a

[yermulnik]

@MaxymVlasov Are you ok with the change?

[MaxymVlasov]

Looks legit

[MaxymVlasov]

just lmc that it will not fail silently
UPD. It works without opentofu too
UPD2. It fail to hacky way for old TF

[yermulnik]

just lmc that it will not fail silently

What's lmc? 🤔
If it fails, then we suppress failure (|| true) and var is left empty.
The change simply suppresses error output.

ps: it might make sense to wrap the hack_terraform_docs=$(terraform version 2> /dev/null | sed -n 1p | grep -c 0.12) || true command in conditional like this:

local hack_terraform_docs=0
if [[ $(\command -V terraform 2> /dev/null) ]]; then
  hack_terraform_docs=$(terraform version | sed -n 1p | grep -c 0.12) || true
fi

WDTY?

[antonbabenko]

This PR is included in version 1.92.1 🎉