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https://github.com/shihanng/tfvar
Terraform's variable definitions template generator.
https://github.com/shihanng/tfvar
cli go golang hcl terraform terraform-configurations terraform-templates terraform-variables tfvar tfvars
Last synced: about 2 months ago
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Terraform's variable definitions template generator.
- Host: GitHub
- URL: https://github.com/shihanng/tfvar
- Owner: shihanng
- License: mit
- Created: 2020-01-23T12:50:22.000Z (over 4 years ago)
- Default Branch: trunk
- Last Pushed: 2023-10-06T15:25:54.000Z (12 months ago)
- Last Synced: 2024-06-18T23:00:10.642Z (3 months ago)
- Topics: cli, go, golang, hcl, terraform, terraform-configurations, terraform-templates, terraform-variables, tfvar, tfvars
- Language: Go
- Homepage: https://dev.to/shihanng/tfvar-a-tool-to-help-you-write-terraform-s-variable-definitions-1j65
- Size: 5.04 MB
- Stars: 198
- Watchers: 5
- Forks: 20
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-tf - tfvar - tfvar scans your Terraform configurations or modules and extracts the variables into formats of your choice (tfvar, environment variables, etc.) for editing. (Tools / Community providers)
README
# `tfvar`
[](https://github.com/shihanng/tfvar/actions?query=workflow%3Amain)
[](https://github.com/shihanng/tfvar/actions?query=workflow%3Arelease)
[](https://github.com/shihanng/tfvar/releases)
[](https://coveralls.io/github/shihanng/tfvar?branch=trunk)
[](https://goreportcard.com/report/github.com/shihanng/tfvar)
[](http://godoc.org/github.com/shihanng/tfvar/pkg/tfvar)
[](https://github.com/shihanng/tfvar/blob/trunk/LICENSE)
**tfvar** is a [Terraform](https://www.terraform.io/)'s [variable definitions](https://www.terraform.io/docs/configuration/variables.html#assigning-values-to-root-module-variables) template generator. It scans your **Terraform configurations** or **modules** and extracts the variables into formats of your choice for editing, e.g., tfvar, environment variables, etc.
For Terraform configuration that has input variables declared, e.g.,
```terraform
variable "image_id" {
type = string
}
variable "availability_zone_names" {
type = list(string)
default = ["us-west-1a"]
}
variable "docker_ports" {
type = list(object({
internal = number
external = number
protocol = string
}))
default = [
{
internal = 8300
external = 8300
protocol = "tcp"
}
]
}
```
- **tfvar** will search for all input variables and generate template that helps user populates those variables easily:
```
$ tfvar .
availability_zone_names = ["us-west-1a"]
docker_ports = [{ external = 8300, internal = 8300, protocol = "tcp" }]
image_id = null
```
- Note that default values are assigned to the definitions by default as shown above. Use the `--ignore-default` options to ignore the default values.
```
$ tfvar . --ignore-default
availability_zone_names = null
docker_ports = null
image_id = null
```
- **tfvar** also provides other output formats:
- In environment variable formats with `-e` flag:
```
$ tfvar . -e
export TF_VAR_availability_zone_names='["us-west-1a"]'
export TF_VAR_docker_ports='[{ external = 8300, internal = 8300, protocol = "tcp" }]'
export TF_VAR_image_id=''
```
- The `-r, --resource` flag outputs all variables as `tfe_variable`
resource of [Terraform Enterprise (tfe) provider](https://registry.terraform.io/providers/hashicorp/tfe/latest/docs/resources/variable).
- The `-w, --workspace` flag outputs all variables in the payload format for the
[Workspace Variables API](https://www.terraform.io/docs/cloud/api/workspace-variables.html#sample-payload)
which can used together with `jq` to filter variables by key name.
```
$ tfvar -w . | jq '. | select(.data.attributes.key == "region")'
{
"data": {
"type": "vars",
"attributes": {
"key": "region",
"value": "",
"description": "",
"category": "terraform",
"hcl": false,
"sensitive": false
}
}
}
```
- There is also `--auto-assign` option for those who wants the values from `terraform.tfvars[.json]`, `*.auto.tfvars[.json]`, and environment variables (`TF_VAR_` followed by the name of a declared variable) to be assigned to the generated definitions automatically.
```
$ export TF_VAR_availability_zone_names='["custom_zone"]'
$ tfvar . --auto-assign
availability_zone_names = ["custom_zone"]
docker_ports = [{ external = 8300, internal = 8300, protocol = "tcp" }]
image_id = null
```
- Like the [`terraform (plan|apply)`](https://www.terraform.io/docs/configuration/variables.html#variables-on-the-command-line) CLI tool, individual vairables can also be specified via `--var` option.
```
$ tfvar . --var=availability_zone_names='["custom_zone"]' --var=image_id=abc123
availability_zone_names = ["custom_zone"]
docker_ports = [{ external = 8300, internal = 8300, protocol = "tcp" }]
image_id = "abc123"
```
- Variables in file can also be specified via `--var-file` option.
```
$ cat my.tfvars
image_id = "xyz"
$ tfvar . --var-file my.tfvars
availability_zone_names = ["us-west-1a"]
docker_ports = [{ external = 8300, internal = 8300, protocol = "tcp" }]
image_id = "xyz"
```
- Multiple files can be specified via providing more `--var-file` options, variables overrides as for `terraform` command.
```
$ cat my.tfvars
image_id = "xyz"
$ cat other.tfvars
image_id = "abc"
$ tfvar . --var-file my.tfvars --var-file other.tfvars
image_id = "abc"
```
For more info, checkout the `--help` page:
```
$ tfvar --help
Generate variable definitions template for Terraform module as
one would write it in variable definitions files (.tfvars).
Usage:
tfvar [DIR] [flags]
Flags:
-a, --auto-assign Use values from environment variables TF_VAR_* and
variable definitions files e.g. terraform.tfvars[.json] *.auto.tfvars[.json]
-d, --debug Print debug log on stderr
-e, --env-var Print output in export TF_VAR_image_id=ami-abc123 format
-h, --help help for tfvar
--ignore-default Do not use defined default values
-r, --resource Print output in Terraform Enterprise (tfe) provider's tfe_variable resource format
--var stringArray Set a variable in the generated definitions.
This flag can be set multiple times.
--var-file stringArray Set variables from a file.
This flag can be set multiple times.
-v, --version version for tfvar
-w, --workspace Print output variables as payloads for Workspace Variables API
```
## Installation
### [Homebrew (macOS)](https://github.com/shihanng/homebrew-tfvar)
```
brew install shihanng/tfvar/tfvar
```
### [MacPorts (macOS)](https://ports.macports.org/port/tfvar/)
```
sudo port install tfvar
```
### Debian, Ubuntu
```
curl -sLO https://github.com/shihanng/tfvar/releases/latest/download/tfvar_linux_amd64.deb
dpkg -i tfvar_linux_amd64.deb
```
### RedHat, CentOS
```
rpm -ivh https://github.com/shihanng/tfvar/releases/latest/download/tfvar_linux_amd64.rpm
```
### Binaries
The [release page](https://github.com/shihanng/tfvar/releases) contains binaries built for various platforms. Download the version matches your environment (e.g. `linux_amd64`) and place the binary in the executable `$PATH` e.g. `/usr/local/bin`:
```
curl -sL https://github.com/shihanng/tfvar/releases/latest/download/tfvar_linux_amd64.tar.gz | \
tar xz -C /usr/local/bin/ tfvar
```
### For Gophers
With [Go](https://golang.org/doc/install) already installed in your system, use `go get`
```
go get github.com/shihanng/tfvar
```
or clone this repo and `make install`
```
git clone https://github.com/shihanng/tfvar.git
cd tfvar
make install
```
## Contributing
Want to add missing feature? Found bug :bug:? Pull requests and issues are welcome. For major changes, please open an issue first to discuss what you would like to change :heart:.
```
make lint
make test
```
should help with the idiomatic Go styles and unit-tests.
## License
[MIT](./LICENSE)