Add Grafana-Terraform-Provider-Version header (#1700)

* Add `Grafana-Terraform-Provider-Version` header
Closes #1694

* Fix unit test

Author: julienduchesne

pkg/provider/configure_clients.go

@@ -128,14 +128,17 @@ func createMLClient(client *common.Client, providerConfig ProviderConfig) error
 }
 
 func createSLOClient(client *common.Client, providerConfig ProviderConfig) error {
+	var err error
+
 	sloConfig := slo.NewConfiguration()
 	sloConfig.Host = client.GrafanaAPIURLParsed.Host
 	sloConfig.Scheme = client.GrafanaAPIURLParsed.Scheme
+	sloConfig.DefaultHeader, err = getHTTPHeadersMap(providerConfig)
 	sloConfig.DefaultHeader["Authorization"] = "Bearer " + providerConfig.Auth.ValueString()
-	sloConfig.DefaultHeader["Grafana-Terraform-Provider"] = "true"
 	sloConfig.HTTPClient = getRetryClient(providerConfig)
 	client.SLOClient = slo.NewAPIClient(sloConfig)
-	return nil
+
+	return err
 }
 
 func createCloudClient(client *common.Client, providerConfig ProviderConfig) error {
@@ -167,7 +170,10 @@ func createOnCallClient(providerConfig ProviderConfig) (*onCallAPI.Client, error
 // Sets a custom HTTP Header on all requests coming from the Grafana Terraform Provider to Grafana-Terraform-Provider: true
 // in addition to any headers set within the `http_headers` field or the `GRAFANA_HTTP_HEADERS` environment variable
 func getHTTPHeadersMap(providerConfig ProviderConfig) (map[string]string, error) {
-	headers := map[string]string{"Grafana-Terraform-Provider": "true"}
+	headers := map[string]string{
+		"Grafana-Terraform-Provider":         "true",
+		"Grafana-Terraform-Provider-Version": providerConfig.Version.ValueString(),
+	}
 	for k, v := range providerConfig.HTTPHeaders.Elements() {
 		if vString, ok := v.(types.String); ok {
 			headers[k] = vString.ValueString()

pkg/provider/framework_provider.go

@@ -41,6 +41,7 @@ type ProviderConfig struct {
 	OncallURL         types.String `tfsdk:"oncall_url"`
 
 	UserAgent types.String `tfsdk:"-"`
+	Version   types.String `tfsdk:"-"`
 }
 
 func (c *ProviderConfig) SetDefaults() error {
@@ -206,6 +207,7 @@ func (p *frameworkProvider) Configure(ctx context.Context, req provider.Configur
 		resp.Diagnostics.AddError("failed to set defaults", err.Error())
 		return
 	}
+	cfg.Version = types.StringValue(p.version)
 	cfg.UserAgent = types.StringValue(fmt.Sprintf("Terraform/%s (+https://www.terraform.io) terraform-provider-grafana/%s", req.TerraformVersion, p.version))
 
 	clients, err := CreateClients(cfg)

pkg/provider/legacy_provider.go

@@ -180,6 +180,7 @@ func configure(version string, p *schema.Provider) func(context.Context, *schema
 			RetryStatusCodes:       statusCodes,
 			RetryWait:              types.Int64Value(int64(d.Get("retry_wait").(int))),
 			UserAgent:              types.StringValue(p.UserAgent("terraform-provider-grafana", version)),
+			Version:                types.StringValue(version),
 		}
 		if err := cfg.SetDefaults(); err != nil {
 			return nil, diag.FromErr(err)

pkg/provider/legacy_provider_test.go

@@ -29,8 +29,8 @@ func TestProviderConfigure(t *testing.T) {
 	// Helper for header tests
 	checkHeaders := func(t *testing.T, provider *schema.Provider) {
 		gotHeaders := provider.Meta().(*common.Client).GrafanaAPIConfig.HTTPHeaders
-		if len(gotHeaders) != 3 {
-			t.Errorf("expected 3 HTTP header, got %d", len(gotHeaders))
+		if len(gotHeaders) != 4 {
+			t.Errorf("expected 4 HTTP header, got %d", len(gotHeaders))
 		}
 		if gotHeaders["Authorization"] != "Bearer test" {
 			t.Errorf("expected HTTP header Authorization to be \"Bearer test\", got %q", gotHeaders["Authorization"])