Run setup-terraform based on required_versions written on versions.tf

versions.tf

# ./aws/versions.tf
terraform {
  required_providers {
    aws = {
      version = "= 5.55.0"
      source  = "hashicorp/aws"
    }
  }
  required_version = "~> 1.8.0" # use latest 1.8.x
  # required_version = "= 1.8.4" # use 1.8.4

  backend "remote" {
    organization = "foo"
    hostname     = "app.terraform.io"
    workspaces {
      name = "foo"
    }
  }
}

workflow.yaml

# .github/workflows/workflow.yaml
runs:
  steps:
    # checkout and any requirement
    - name: Get terraform version from .terraform-version
      shell: bash
      id: terraform-version
      run: |
        required_version=$(grep -E 'required_version\s*=\s*"([^"]+)"' "versions.tf" | sed -n 's/.*required_version\s*=\s*"\([^"]*\)".*/\1/p')
        echo "value=$required_version" | tee -a "${GITHUB_OUTPUT}"
      working-directory: ./aws
    - uses: hashicorp/setup-terraform@v3
      with:
        terraform_version: ${{ steps.terraform-version.outputs.value }} # "~> 1.8.0"