Add support for user configured state object names in swift containers

backend/remote-state/swift/backend.go

@@ -237,6 +237,13 @@ func New() backend.Backend {
 				Description: "Lock state access",
 				Default:     true,
 			},
+
+			"state_name": &schema.Schema{
+				Type:        schema.TypeString,
+				Optional:    true,
+				Description: descriptions["state_name"],
+				Default:     "tfstate.tf",
+			},
 		},
 	}
 
@@ -308,6 +315,8 @@ func init() {
 		"archive_container": "Swift container to archive state to.",
 
 		"expire_after": "Archive object expiry duration.",
+
+		"state_name": "Name of state object in container",
 	}
 }
 
@@ -321,6 +330,7 @@ type Backend struct {
 	expireSecs       int
 	container        string
 	lock             bool
+	stateName        string
 }
 
 func (b *Backend) configure(ctx context.Context) error {
@@ -364,6 +374,9 @@ func (b *Backend) configure(ctx context.Context) error {
 		return err
 	}
 
+	// Assign state name
+	b.stateName = data.Get("state_name").(string)
+
 	// Assign Container
 	b.container = data.Get("container").(string)
 	if b.container == "" {

backend/remote-state/swift/backend_state.go

@@ -189,9 +189,9 @@ func (b *Backend) StateMgr(name string) (state.State, error) {
 
 func (b *Backend) objectName(name string) string {
 	if name != backend.DefaultStateName {
-		name = fmt.Sprintf("%s%s/%s", objectEnvPrefix, name, TFSTATE_NAME)
+		name = fmt.Sprintf("%s%s/%s", objectEnvPrefix, name, b.stateName)
 	} else {
-		name = TFSTATE_NAME
+		name = b.stateName
 	}
 
 	return name

backend/remote-state/swift/client.go

@@ -19,8 +19,6 @@ import (
 )
 
 const (
-	TFSTATE_NAME = "tfstate.tf"
-
 	consistencyTimeout = 15
 
 	// Suffix that will be appended to state file paths

website/docs/backends/types/swift.html.md

@@ -26,8 +26,6 @@ terraform {
 ```
 This will create a container called `terraform-state` and an object within that container called `tfstate.tf`. It will enable versioning using the `terraform-state-archive` container to contain the older version.
 
--> Note: Currently, the object name is statically defined as 'tfstate.tf'. Therefore Swift [pseudo-folders](https://docs.openstack.org/user-guide/cli-swift-pseudo-hierarchical-folders-directories.html) are not currently supported.
-
 For the access credentials we recommend using a
 [partial configuration](/docs/backends/config.html).
 
@@ -53,6 +51,9 @@ The following configuration options are supported:
  * `container` - (Required) The name of the container to create for storing
    the Terraform state file.
 
+ * `state_name` - (Optional) The name of the state file in the container.
+   Defaults to `tfstate.tf`.
+
  * `path` - (Optional) DEPRECATED: Use `container` instead.
    The name of the container to create in order to store the state file.