feat: add package for authenticating npm to artifact registry

tools/sgnpmartifactregistryauth/tools.go

@@ -0,0 +1,29 @@
+package sgnpmartifactregistryauth
+
+import (
+	"context"
+	"os/exec"
+
+	"go.einride.tech/sage/sg"
+)
+
+const (
+	name = "npm-artifact-registry-auth"
+)
+
+func Command(ctx context.Context, args ...string) *exec.Cmd {
+	sg.Deps(ctx, PrepareCommand)
+	return sg.Command(ctx, sg.FromBinDir(name), args...)
+}
+
+func PrepareCommand(ctx context.Context) error {
+	sg.Logger(ctx).Println("authenticating npm to artifact registry...")
+	if err := sg.Command(
+		ctx,
+		"npx",
+		"google-artifactregistry-auth",
+	).Run(); err != nil {
+		return err
+	}
+	return nil
+}