Add workspace host mismatch check

bundle/config/mutator/validate_workspace_host.go

@@ -0,0 +1,30 @@
+package mutator
+
+import (
+	"context"
+
+	"github.com/databricks/cli/bundle"
+	"github.com/databricks/cli/bundle/env"
+	"github.com/databricks/cli/libs/diag"
+)
+
+type validateWorkspaceHost struct{}
+
+func ValidateWorkspaceHost() *validateWorkspaceHost {
+	return &validateWorkspaceHost{}
+}
+
+func (m *validateWorkspaceHost) Name() string {
+	return "ValidateWorkspaceHost"
+}
+
+func (m *validateWorkspaceHost) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagnostics {
+	env_host, _ := env.Host(ctx)
+	target_host := b.Config.Workspace.Host
+
+	if env_host != "" && target_host != "" && env_host != target_host {
+		return diag.Errorf("Target host and DATABRICKS_HOST environment variable mismatch")
+	}
+
+	return nil
+}

bundle/env/host.go

@@ -0,0 +1,11 @@
+package env
+
+import "context"
+
+const HostVariable = "DATABRICKS_HOST"
+
+func Host(ctx context.Context) (string, bool) {
+	return get(ctx, []string{
+		HostVariable,
+	})
+}

bundle/phases/deploy.go

@@ -25,6 +25,7 @@ func Deploy() bundle.Mutator {
 			bundle.Seq(
 				terraform.StatePull(),
 				deploy.StatePull(),
+				mutator.ValidateWorkspaceHost(),
 				mutator.ValidateGitDetails(),
 				libraries.ValidateLocalLibrariesExist(),
 				artifacts.CleanUp(),