feat(DataSource): Added new data source

- Added the new data source dns_domain_name to get one domain
- Fixed some comment in datasource_instance.go, datasource_instances.go

BREAKING CHANGE: No

Signed-off-by: Alejandro JNM <alejandrojnm@gmail.com>

civo/datasource_dns_domain_name.go

@@ -0,0 +1,62 @@
+package civo
+
+import (
+	"fmt"
+	"github.com/civo/civogo"
+	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
+	"log"
+)
+
+// Data source to get from the api a specific domain
+// using the id or the name of the domain
+func dataSourceDnsDomainName() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceDnsDomainNameRead,
+		Schema: map[string]*schema.Schema{
+			"id": {
+				Type:         schema.TypeString,
+				Optional:     true,
+				ValidateFunc: validation.NoZeroValues,
+				ExactlyOneOf: []string{"id", "name"},
+			},
+			"name": {
+				Type:         schema.TypeString,
+				Optional:     true,
+				ValidateFunc: validation.NoZeroValues,
+				ExactlyOneOf: []string{"id", "name"},
+			},
+		},
+	}
+}
+
+func dataSourceDnsDomainNameRead(d *schema.ResourceData, m interface{}) error {
+	apiClient := m.(*civogo.Client)
+
+	var foundDomain *civogo.DNSDomain
+
+	if id, ok := d.GetOk("id"); ok {
+		log.Printf("[INFO] Getting the domain by id")
+		domain, err := apiClient.FindDNSDomain(id.(string))
+		if err != nil {
+			fmt.Errorf("[ERR] failed to retrive domain: %s", err)
+			return err
+		}
+
+		foundDomain = domain
+	} else if name, ok := d.GetOk("name"); ok {
+		log.Printf("[INFO] Getting the domain by name")
+		image, err := apiClient.FindDNSDomain(name.(string))
+		if err != nil {
+			fmt.Errorf("[ERR] failed to retrive domain: %s", err)
+			return err
+		}
+
+		foundDomain = image
+	}
+
+	d.SetId(foundDomain.ID)
+	d.Set("name", foundDomain.Name)
+
+	return nil
+}

civo/datasource_instance.go

@@ -8,8 +8,8 @@ import (
 	"log"
 )
 
-// Data source to get from the api a specific template
-// using the code of the image
+// Data source to get from the api a specific instance
+// using the id or the hostname
 func dataSourceInstance() *schema.Resource {
 	return &schema.Resource{
 		Read: dataSourceInstanceRead,

civo/datasource_instances.go

@@ -7,8 +7,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
 )
 
-// Data source to get and filter all instances size
-// use to define the size in resourceInstance
+// Data source to get and filter all instances with filter
 func dataSourceInstances() *schema.Resource {
 	dataListConfig := &datalist.ResourceConfig{
 		RecordSchema: map[string]*schema.Schema{

civo/provider.go

@@ -22,6 +22,7 @@ func Provider() terraform.ResourceProvider {
 			"civo_instances_size":     dataSourceInstancesSize(),
 			"civo_instances":          dataSourceInstances(),
 			"civo_instance":           dataSourceInstance(),
+			"civo_dns_domain_name":    dataSourceDnsDomainName(),
 		},
 		ResourcesMap: map[string]*schema.Resource{
 			"civo_instance":           resourceInstance(),

website/docs/d/dns_domain_name.html.markdown

@@ -0,0 +1,60 @@
+---
+layout: "civo"
+page_title: "Civo: civo_dns_domain_name"
+sidebar_current: "docs-civo-datasource-domain"
+description: |-
+  Get information on a domain.
+---
+
+# civo_dns_domain_name
+
+Get information on a domain. This data source provides the name and the id, this is useful if the domain
+name in question is not managed by Terraform.
+
+An error is triggered if the provided domain name is not managed with your
+Civo account.
+
+## Example Usage
+
+Get the name and the id file for a domain:
+
+```hcl
+data "civo_dns_domain_name" "domain" {
+    name = "domain.com"
+}
+
+output "domain_output" {
+  value = data.civo_dns_domain_name.domain.name
+}
+output "domain_id_output" {
+  value = data.civo_dns_domain_name.domain.id
+}
+
+```
+
+```
+  $ terraform apply
+
+data.civo_dns_domain_name.domain: Refreshing state...
+
+Apply complete! Resources: 0 added, 0 changed, 0 destroyed.
+
+Outputs:
+
+domain_output = domain.com.
+domain_id_output = 6ea98024-c6d7-4d0c-bd01-8ee0cab5224e
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `id` - (Optional) The id of the domain.
+* `name` - (Optional) The name of the domain.
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `id` - A unique ID that can be used to identify and reference a domain.
+* `name` - The name of the domain.