tfschema

A schema inspector for Terraform providers.

Features

• Get resource type definitions dynamically from Terraform providers via go-plugin protocol.
• List available resource types.
• Autocomplete resource types in bash/zsh.
• Open official provider documents quickly by your system web browser.
• Terraform v0.14 support (minimum requirements: Terraform >= v0.11)

Getting Started

$ brew install minamijoyo/tfschema/tfschema

$ echo 'provider "aws" {}' > main.tf
$ terraform init

$ tfschema resource list aws | grep aws_iam_user
aws_iam_user
aws_iam_user_group_membership
aws_iam_user_login_profile
aws_iam_user_policy
aws_iam_user_policy_attachment
aws_iam_user_ssh_key

$ tfschema resource show aws_iam_user
+----------------------+-------------+----------+----------+----------+-----------+
| ATTRIBUTE            | TYPE        | REQUIRED | OPTIONAL | COMPUTED | SENSITIVE |
+----------------------+-------------+----------+----------+----------+-----------+
| arn                  | string      | false    | false    | true     | false     |
| force_destroy        | bool        | false    | true     | false    | false     |
| id                   | string      | false    | true     | true     | false     |
| name                 | string      | true     | false    | false    | false     |
| path                 | string      | false    | true     | false    | false     |
| permissions_boundary | string      | false    | true     | false    | false     |
| tags                 | map(string) | false    | true     | false    | false     |
| unique_id            | string      | false    | false    | true     | false     |
+----------------------+-------------+----------+----------+----------+-----------+

Install

If you are Mac OSX user:

$ brew install minamijoyo/tfschema/tfschema

or

If you have Go 1.15+ development environment:

$ git clone https://github.com/minamijoyo/tfschema
$ cd tfschema
$ go install

or

Download the latest compiled binaries and put it anywhere in your executable path.

https://github.com/minamijoyo/tfschema/releases

Requirements for Terraform providers

• terraform-provider-aws >= v1.11.0
• terraform-provider-google >= v1.5.0
• terraform-provider-azurerm >= v1.3.0

Other providers

Your provider may or may not support a required API. If your provider support Terraform >= v0.11, it should work. Strictly speaking, the tfschema depends on the Terraform's GetSchema API.

The tfschema requires the provider's dependency library version to:

• hashicorp/terraform >= v0.10.8
• zclconf/go-cty >= 14e23b14828dd12cc7ae0956813c7e91a196e68f (2018/01/06)

Rules of finding provider's binary

When terraform init command is executed, provider's binary is installed under the auto installed directory ( .terraform/providers/<SOURCE ADDRESS>/<VERSION>/<OS>_<ARCH> ) by default. The tfschema can use the same provider's binary as terraform uses, so you can run tfschema command in the same directory where you run the terraform command Alternatively, you can set the environment variable $TFSCHEMA_ROOT_DIR to be this directory. If $TFSCHEMA_ROOT_DIR is not set, it will default to the current directory

The tfschema finds provider's binary under the following directories.

1. $TFSCHEMA_ROOT_DIR
2. same directory as tfschema executable
3. user vendor directory ( $TFSCHEMA_ROOT_DIR/terraform.d/plugins/<OS>_<ARCH> )
4. auto installed directory for Terraform v0.14+ ( $TFSCHEMA_ROOT_DIR/.terraform/providers/<SOURCE ADDRESS>/<VERSION>/<OS>_<ARCH> )
5. auto installed directory for Terraform v0.13 ( $TFSCHEMA_ROOT_DIR/.terraform/plugins/<SOURCE ADDRESS>/<VERSION>/<OS>_<ARCH> )
6. legacy auto installed directory for Terraform < v0.13 ( $TFSCHEMA_ROOT_DIR/.terraform/plugins/<OS>_<ARCH> )
7. global plugin directory ( $HOME/.terraform.d/plugins )
8. global plugin directory with os and arch ( $HOME/.terraform.d/plugins/<OS>_<ARCH> )
9. gopath ( $GOPATH/bin )

If you are Mac OSX user, <OS>_<ARCH> is darwin_amd64. The <SOURCE ADDRESS> is a fully qualified provider name in Terraform 0.13+. (e.g. registry.terraform.io/hashicorp/aws)

Note that it doesn't have exactly the same behavior of Terraform because of some reasons:

• Support multiple Terraform versions
• Can't import internal packages of Terraform and it's too complicated to support
• For debug

Autocomplete

To enable autocomplete, execute the following command:

$ tfschema -install-autocomplete

The above command adds the following line to your ~/.bashrc and ~/.zshrc:

.bashrc

complete -C </path/to/tfschema> tfschema

.zshrc

autoload -U +X bashcompinit && bashcompinit
complete -o nospace -C </path/to/tfschema> tfschema

Check your .bashrc and/or .zshrc and reload it.

Usage

$ tfschema --help
Usage: tfschema [--version] [--help] <command> [<args>]

Available commands are:
    data
    provider
    resource

$ tfschema resource --help
This command is accessed by using one of the subcommands below.

Subcommands:
    browse    Browse a documentation of resource
    list      List resource types
    show      Show a type definition of resource

$ tfschema resource show --help
Usage: tfschema resource show [options] RESOURCE_TYPE

Options:

  -format=type    Set output format to table or json (default: table)

Contributions

Any feedback and contributions are welcome. Feel free to open an issue and submit a pull request.

Acknowledgments

The tfschema is built on Terraform and its providers. I'm sincerely grateful to those authors.

License

MIT