From 22692e48d245dbdd4f80b5836deafdea738d4086 Mon Sep 17 00:00:00 2001
From: Clayton Craft <clayton@craftyguy.net>
Date: Sat, 18 Feb 2023 11:17:55 -0800
Subject: [PATCH] filelist/initramfs: add new type for slurping up file listers

---
 internal/filelist/initramfs/initramfs.go | 34 ++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 internal/filelist/initramfs/initramfs.go

diff --git a/internal/filelist/initramfs/initramfs.go b/internal/filelist/initramfs/initramfs.go
new file mode 100644
index 0000000..f119c36
--- /dev/null
+++ b/internal/filelist/initramfs/initramfs.go
@@ -0,0 +1,34 @@
+package initramfs
+
+import (
+	"gitlab.com/postmarketOS/postmarketos-mkinitfs/internal/filelist"
+)
+
+// Initramfs allows building arbitrarily complex lists of features, by slurping
+// up types that implement FileLister (which includes this type! yippee) and
+// combining the output from them.
+type Initramfs struct {
+	features []filelist.FileLister
+}
+
+// New returns a new Initramfs that generate a list of files based on the given
+// list of FileListers.
+func New(features []filelist.FileLister) *Initramfs {
+	return &Initramfs{
+		features: features,
+	}
+}
+
+func (i *Initramfs) List() (*filelist.FileList, error) {
+	files := filelist.NewFileList()
+
+	for _, f := range i.features {
+		list, err := f.List()
+		if err != nil {
+			return nil, err
+		}
+		files.Import(list)
+	}
+
+	return files, nil
+}