[IR-3175] Enforce minimum Terraform version of 1.0 (#172)

Author: alexmingoia

provider/provider.go

@@ -9,6 +9,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/meta"
+	goversion "github.com/hashicorp/go-version"
 	"github.com/rootlyhq/terraform-provider-rootly/v2/client"
 )
 
@@ -31,6 +32,7 @@ func init() {
 func New(version string) func() *schema.Provider {
 	return func() *schema.Provider {
 		p := &schema.Provider{
+			TerraformVersion: "1.0",
 			Schema: map[string]*schema.Schema{
 				"api_host": {
 					Description: "The Rootly API host. Defaults to https://api.rootly.com. Can also be sourced from the `ROOTLY_API_URL` environment variable.",
@@ -326,6 +328,15 @@ func configure(version string, p *schema.Provider) func(context.Context, *schema
 		// Warning or errors can be collected in a slice type
 		var diags diag.Diagnostics
 
+		if goversion.Must(goversion.NewVersion(p.TerraformVersion)).LessThan(goversion.Must(goversion.NewVersion("1.0"))) {
+		    diags = append(diags, diag.Diagnostic{
+		        Severity: diag.Error,
+		        Summary:  "Unsupported Terraform Version",
+		        Detail:   "Please upgrade Terraform to at least version 1.0.",
+		    })
+		    return nil, diags
+		}
+
 		cli, err := client.NewClient(host, token, RootlyUserAgent(version))
 		if err != nil {
 			diags = append(diags, diag.Diagnostic{

tools/generate-provider-tpl.js

@@ -11,6 +11,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/meta"
+	goversion "github.com/hashicorp/go-version"
 	"github.com/rootlyhq/terraform-provider-rootly/v2/client"
 )
 
@@ -33,6 +34,7 @@ func init() {
 func New(version string) func() *schema.Provider {
 	return func() *schema.Provider {
 		p := &schema.Provider{
+			TerraformVersion: "1.0",
 			Schema: map[string]*schema.Schema {
 				"api_host": {
 					Description: "The Rootly API host. Defaults to https://api.rootly.com. Can also be sourced from the \`ROOTLY_API_URL\` environment variable.",
@@ -122,6 +124,15 @@ func configure(version string, p *schema.Provider) func(context.Context, *schema
 		// Warning or errors can be collected in a slice type
 		var diags diag.Diagnostics
 
+		if goversion.Must(goversion.NewVersion(p.TerraformVersion)).LessThan(goversion.Must(goversion.NewVersion("1.0"))) {
+		    diags = append(diags, diag.Diagnostic{
+		        Severity: diag.Error,
+		        Summary:  "Unsupported Terraform Version",
+		        Detail:   "Please upgrade Terraform to at least version 1.0.",
+		    })
+		    return nil, diags
+		}
+
 		cli, err := client.NewClient(host, token, RootlyUserAgent(version))
 		if err != nil {
 			diags = append(diags, diag.Diagnostic{