Refactor entrypoint

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/bootstrap/write.go

@@ -0,0 +1,44 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package bootstrap
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"go.probo.inc/probo/pkg/probod"
+	"gopkg.in/yaml.v3"
+)
+
+// WriteConfig writes the configuration to the specified path as YAML.
+// It creates the parent directory if it doesn't exist.
+func WriteConfig(cfg *probod.FullConfig, path string) error {
+	dir := filepath.Dir(path)
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return fmt.Errorf("create directory %s: %w", dir, err)
+	}
+
+	data, err := yaml.Marshal(cfg)
+	if err != nil {
+		return fmt.Errorf("marshal config: %w", err)
+	}
+
+	if err := os.WriteFile(path, data, 0600); err != nil {
+		return fmt.Errorf("write config file: %w", err)
+	}
+
+	return nil
+}