feat: add specific code to module missing warning

types/diagnostics.go

@@ -10,6 +10,11 @@ const (
 	// DiagnosticCodeRequired is used when a parameter value is `null`, but
 	// the parameter is required.
 	DiagnosticCodeRequired = "required"
+
+	// DiagnosticModuleNotLoaded is used when a module block is present, but
+	// the mode failed to load. This can be because `.terraform/modules` is
+	// not present.
+	DiagnosticModuleNotLoaded = "module_not_loaded"
 )
 
 type DiagnosticExtra struct {

warnings.go

@@ -6,6 +6,8 @@ import (
 
 	"github.com/aquasecurity/trivy/pkg/iac/terraform"
 	"github.com/hashicorp/hcl/v2"
+
+	"github.com/coder/preview/types"
 )
 
 func warnings(modules terraform.Modules) hcl.Diagnostics {
@@ -53,12 +55,12 @@ func unresolvedModules(modules terraform.Modules) hcl.Diagnostics {
 					label += " " + fmt.Sprintf("%q", l)
 				}
 
-				diags = diags.Append(&hcl.Diagnostic{
+				diags = diags.Append(types.DiagnosticCode(&hcl.Diagnostic{
 					Severity: hcl.DiagWarning,
 					Summary:  "Module not loaded. Did you run `terraform init`?",
 					Detail:   fmt.Sprintf("Module '%s' in file %q cannot be resolved. This module will be ignored.", label, block.HCLBlock().DefRange),
 					Subject:  &(block.HCLBlock().DefRange),
-				})
+				}, types.DiagnosticModuleNotLoaded))
 			}
 		}
 	}