Logging and Output to Determine Installed Terraform CLI Version

[bflad]

Version

v1.3.2 (current v1)

Description

When using a non-pinned constraint, e.g.

    - uses: hashicorp/setup-terraform@v1
      with:
        terraform_version: '1.1.*'

This action does not provide any indication of the actually installed Terraform CLI version. This can make debugging more difficult, especially in matrix-based testing.

Workaround

Manually run terraform version as its own command.

    - uses: hashicorp/setup-terraform@v1
      with:
        terraform_version: ${{ matrix.terraform }}
        terraform_wrapper: false
    - run: terraform version

In the Actions UI:

Terraform v1.1.2
on linux_amd64

Proposals

A first proposal would be to have the action automatically run terraform version (potentially with the -json flag where supported) and informationally log the command's output. This has the added benefit of always showing the version regardless of other workflow configuration and verifying the install upfront.

A second proposal would be to further handle the terraform version output by parsing it to extract the actual version, then saving that as an action output (e.g. terraform_version or cli_version). This would allow downstream steps to either output the version manually or use that version for further logic.

References

• Related: Action does not use terraform_version sometimes #130

[iiro]

A very good idea @bflad!