Make configuration versions useful for workspaces

This adds the current configuration version ID to the workspace model
and also includes the current VCS revision information on a given
configuration version. This makes the configuration version information
useful for workspaces that are VCS-backed.

configuration_version.go

@@ -29,7 +29,7 @@ type configurationVersions struct {
 // ConfigurationStatus represents a configuration version status.
 type ConfigurationStatus string
 
-//List all available configuration version statuses.
+// List all available configuration version statuses.
 const (
 	ConfigurationErrored  ConfigurationStatus = "errored"
 	ConfigurationPending  ConfigurationStatus = "pending"
@@ -43,7 +43,8 @@ type ConfigurationVersion struct {
 	ID     string              `jsonapi:"primary,configuration-versions"`
 	Status ConfigurationStatus `jsonapi:"attr,status"`
 	// Relations
-	Workspace *Workspace `jsonapi:"relation,workspace"`
+	Workspace   *Workspace   `jsonapi:"relation,workspace"`
+	VcsRevision *VcsRevision `jsonapi:"relation,vcs-revision,omitempty"`
 }
 
 // ConfigurationVersionCreateOptions represents the options for creating a
@@ -94,8 +95,13 @@ func (s *configurationVersions) Read(ctx context.Context, cvID string) (*Configu
 		return nil, errors.New("invalid value for configuration version ID")
 	}
 
+	options := struct {
+		Include string `url:"include"`
+	}{
+		Include: "vcs-revision",
+	}
 	u := fmt.Sprintf("configuration-versions/%s", url.QueryEscape(cvID))
-	req, err := s.client.newRequest("GET", u, nil)
+	req, err := s.client.newRequest("GET", u, options)
 	if err != nil {
 		return nil, err
 	}

workspace.go

@@ -93,13 +93,14 @@ type Workspace struct {
 	VarFiles                  []string               `jsonapi:"attr,var-files"`
 
 	// Relations
-	CurrentRun    *Run           `jsonapi:"relation,current-run"`
-	Environment   *Environment   `jsonapi:"relation,environment"`
-	CreatedBy     *User          `jsonapi:"relation,created-by"`
-	VcsProvider   *VcsProvider   `jsonapi:"relation,vcs-provider"`
-	AgentPool     *AgentPool     `jsonapi:"relation,agent-pool"`
-	ModuleVersion *ModuleVersion `jsonapi:"relation,module-version,omitempty"`
-	Tags          []*Tag         `jsonapi:"relation,tags"`
+	CurrentRun           *Run                  `jsonapi:"relation,current-run"`
+	Environment          *Environment          `jsonapi:"relation,environment"`
+	CreatedBy            *User                 `jsonapi:"relation,created-by"`
+	VcsProvider          *VcsProvider          `jsonapi:"relation,vcs-provider"`
+	AgentPool            *AgentPool            `jsonapi:"relation,agent-pool"`
+	ModuleVersion        *ModuleVersion        `jsonapi:"relation,module-version,omitempty"`
+	ConfigurationVersion *ConfigurationVersion `jsonapi:"relation,configuration-version,omitempty"`
+	Tags                 []*Tag                `jsonapi:"relation,tags"`
 }
 
 // Hooks contains the custom hooks field.