Merge pull request #72 from upbound/bootcheck

add basic plumbing for provider startup checks

Author: jastang

cmd/provider/main.go

@@ -8,6 +8,7 @@ package main
 
 import (
 	"context"
+	"log"
 	"os"
 	"path/filepath"
 	"time"
@@ -36,10 +37,18 @@ import (
 
 	"github.com/upbound/provider-opentofu/apis"
 	"github.com/upbound/provider-opentofu/apis/v1beta1"
+	"github.com/upbound/provider-opentofu/internal/bootcheck"
 	workspace "github.com/upbound/provider-opentofu/internal/controller"
 	"github.com/upbound/provider-opentofu/internal/controller/features"
 )
 
+func init() {
+	err := bootcheck.CheckEnv()
+	if err != nil {
+		log.Fatalf("bootcheck failed. provider will not be started: %v", err)
+	}
+}
+
 func main() {
 	var (
 		app                        = kingpin.New(filepath.Base(os.Args[0]), "Terraform HCL support for Crossplane via OpenTofu.").DefaultEnvars()

internal/bootcheck/default.go

@@ -0,0 +1,10 @@
+//go:build !custombootcheck
+// +build !custombootcheck
+
+package bootcheck
+
+func CheckEnv() error {
+	// No-op by default. Use build tags for build-time isolation of custom preflight checks.
+	// Ensure to update the build tags on L1-L2 so that they are mutually exclusive across implementations.
+	return nil
+}