Similar to how Terraform provides a way to [define variables](https://www.terraform.io/docs/configuration/variables.html#declaring-an-input-variable){:target="_blank" rel="noopener" class="_"},
Similar to how Terraform provides a way to [define variables](https://www.terraform.io/docs/configuration/variables.html#declaring-an-input-variable){:target="blank" rel="noopener" class=""},
the HCL file format also supports variable block definitions. These can be used
the HCL file format also supports variable block definitions. These can be used
to define variables with values provided by the current environment, or a
to define variables with values provided by the current environment, or a
default value when unset:
default value when unset:
@ -120,8 +120,8 @@ $ TAG=dev docker buildx bake webapp-dev # will use the TAG environment variable
### Functions
### Functions
A [set of generally useful functions](https://github.com/docker/buildx/blob/master/bake/hclparser/stdlib.go){:target="_blank" rel="noopener" class="_"}
A [set of generally useful functions](https://github.com/docker/buildx/blob/master/bake/hclparser/stdlib.go){:target="blank" rel="noopener" class=""}
provided by [go-cty](https://github.com/zclconf/go-cty/tree/main/cty/function/stdlib){:target="_blank" rel="noopener" class="_"}
provided by [go-cty](https://github.com/zclconf/go-cty/tree/main/cty/function/stdlib){:target="blank" rel="noopener" class=""}
are available for use in HCL files:
are available for use in HCL files:
```hcl
```hcl
@ -135,7 +135,7 @@ target "webapp-dev" {
}
}
```
```
In addition, [user defined functions](https://github.com/hashicorp/hcl/tree/main/ext/userfunc){:target="_blank" rel="noopener" class="_"}
In addition, [user defined functions](https://github.com/hashicorp/hcl/tree/main/ext/userfunc){:target="blank" rel="noopener" class=""}