feat: Add legacy_variable_name to parameter (#110)

* feat: Add legacy_variable_name to parameter

* fix

* fix

* Fix

Author: mtojek

docs/data-sources/parameter.md

@@ -24,7 +24,8 @@ Use this data source to configure editable options for workspaces.
 - `default` (String) A default value for the parameter.
 - `description` (String) Describe what this parameter does.
 - `icon` (String) A URL to an icon that will display in the dashboard. View built-in icons here: https://github.com/coder/coder/tree/main/site/static/icon. Use a built-in icon with `data.coder_workspace.me.access_url + "/icon/<path>"`.
-- `legacy_variable` (String) The name of the Terraform variable used by legacy parameters. Coder will use it to lookup the parameter value.
+- `legacy_variable` (String) Reference to the Terraform variable. Coder will use it to lookup the default value.
+- `legacy_variable_name` (String) Name of the legacy Terraform variable. Coder will use it to lookup the variable value.
 - `mutable` (Boolean) Whether this value can be changed after workspace creation. This can be destructive for values like region, so use with caution!
 - `option` (Block List, Max: 64) Each "option" block defines a value for a user to select from. (see [below for nested schema](#nestedblock--option))
 - `type` (String) The type of this parameter. Must be one of: "number", "string", or "bool".

examples/resources/coder_parameter_migration/resource.tf

@@ -6,7 +6,9 @@ variable "old_account_name" {
 }
 
 data "coder_parameter" "account_name" {
-  name            = "Account Name"
-  type            = "string"
-  legacy_variable = var.old_account_name
+  name = "Account Name"
+  type = "string"
+
+  legacy_variable_name = "old_account_name"
+  legacy_variable      = var.old_account_name
 }

provider/parameter.go

@@ -50,7 +50,8 @@ type Parameter struct {
 	Validation  []Validation
 	Optional    bool
 
-	LegacyVariable string
+	LegacyVariableName string
+	LegacyVariable     string
 }
 
 func parameterDataSource() *schema.Resource {
@@ -72,7 +73,8 @@ func parameterDataSource() *schema.Resource {
 				Validation  interface{}
 				Optional    interface{}
 
-				LegacyVariable interface{}
+				LegacyVariableName interface{}
+				LegacyVariable     interface{}
 			}{
 				Value:       rd.Get("value"),
 				Name:        rd.Get("name"),
@@ -101,7 +103,8 @@ func parameterDataSource() *schema.Resource {
 					rd.Set("optional", val)
 					return val
 				}(),
-				LegacyVariable: rd.Get("legacy_variable"),
+				LegacyVariableName: rd.Get("legacy_variable_name"),
+				LegacyVariable:     rd.Get("legacy_variable"),
 			}, &parameter)
 			if err != nil {
 				return diag.Errorf("decode parameter: %s", err)
@@ -297,10 +300,17 @@ func parameterDataSource() *schema.Resource {
 				Computed:    true,
 				Description: "Whether this value is optional.",
 			},
+			"legacy_variable_name": {
+				Type:         schema.TypeString,
+				Optional:     true,
+				RequiredWith: []string{"legacy_variable"},
+				Description:  "Name of the legacy Terraform variable. Coder will use it to lookup the variable value.",
+			},
 			"legacy_variable": {
-				Type:        schema.TypeString,
-				Optional:    true,
-				Description: "The name of the Terraform variable used by legacy parameters. Coder will use it to lookup the parameter value.",
+				Type:         schema.TypeString,
+				Optional:     true,
+				RequiredWith: []string{"legacy_variable_name"},
+				Description:  "Reference to the Terraform variable. Coder will use it to lookup the default value.",
 			},
 		},
 	}