# setup-terraform
The `hashicorp/setup-terraform` action is a JavaScript action that sets up Terraform CLI in your GitHub Actions workflow by:
- Downloading a specific version of Terraform CLI and adding it to the `PATH`.
- Configuring the [Terraform CLI configuration file](https://www.terraform.io/docs/commands/cli-config.html) with a Terraform Cloud/Enterprise hostname and API token.
- Installing a wrapper script to wrap subsequent calls of the `terraform` binary and expose its STDOUT, STDERR, and exit code as outputs named `stdout`, `stderr`, and `exitcode` respectively. (This can be optionally skipped if subsequent steps in the same job do not need to access the results of Terraform commands.)
After you've used the action, subsequent steps in the same job can run arbitrary Terraform commands using [the GitHub Actions `run` syntax](https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idstepsrun). This allows most Terraform commands to work exactly like they do on your local command line.
## Usage
This action can be run on `ubuntu-latest`, `windows-latest`, and `macos-latest` GitHub Actions runners. When running on `windows-latest` the shell should be set to Bash.
The default configuration installs the latest version of Terraform CLI and installs the wrapper script to wrap subsequent calls to the `terraform` binary.
```yaml
steps:
- uses: hashicorp/setup-terraform@v1
```
A specific version of Terraform CLI can be installed.
```yaml
steps:
- uses: hashicorp/setup-terraform@v1
with:
terraform_version: 0.12.25
```
Credentials for Terraform Cloud (app.terraform.io) can be configured.
```yaml
steps:
- uses: hashicorp/setup-terraform@v1
with:
cli_config_credentials_token: ${{ secrets.TF_API_TOKEN }}
```
Credentials for Terraform Enterprise can be configured.
```yaml
steps:
- uses: hashicorp/setup-terraform@v1
with:
cli_config_credentials_hostname: 'terraform.example.com'
cli_config_credentials_token: ${{ secrets.TF_API_TOKEN }}
```
The wrapper script installation can be skipped.
```yaml
steps:
- uses: hashicorp/setup-terraform@v1
with:
terraform_wrapper: false
```
Subsequent steps can access outputs when the wrapper script is installed.
```yaml
steps:
- uses: hashicorp/setup-terraform@v1
- run: terraform init
- id: plan
run: terraform plan -no-color
- run: echo ${{ steps.plan.outputs.stdout }}
- run: echo ${{ steps.plan.outputs.stderr }}
- run: echo ${{ steps.plan.outputs.exitcode }}
```
Outputs can be used in subsequent steps to comment on the pull request:
```yaml
defaults:
run:
working-directory: ${{ env.tf_actions_working_dir }}
steps:
- uses: actions/checkout@v2
- uses: hashicorp/setup-terraform@v1
- name: Terraform fmt
id: fmt
run: terraform fmt -check
continue-on-error: true
- name: Terraform Init
id: init
run: terraform init
- name: Terraform Validate
id: validate
run: terraform validate -no-color
- name: Terraform Plan
id: plan
run: terraform plan -no-color
continue-on-error: true
- uses: actions/github-script@0.9.0
if: github.event_name == 'pull_request'
env:
PLAN: "terraform\n${{ steps.plan.outputs.stdout }}"
with:
github-token: ${{ secrets.GITHUB_TOKEN }}
script: |
const output = `#### Terraform Format and Style 🖌\`${{ steps.fmt.outcome }}\`
#### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
#### Terraform Validation 🤖\`${{ steps.validate.outputs.stdout }}\`
#### Terraform Plan 📖\`${{ steps.plan.outcome }}\`
Show Plan
\`\`\`\n
${process.env.PLAN}
\`\`\`