From e93af9c1bd2684898f5ebc31733df667ca0a8f12 Mon Sep 17 00:00:00 2001
From: Mike Crute <mike@crute.us>
Date: Fri, 18 Aug 2023 09:36:31 -0700
Subject: fs: add MustSub

---
 fs/sub.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 fs/sub.go

diff --git a/fs/sub.go b/fs/sub.go
new file mode 100644
index 0000000..7c051b7
--- /dev/null
+++ b/fs/sub.go
@@ -0,0 +1,14 @@
+package fs
+
+import (
+	"fmt"
+	"io/fs"
+)
+
+func MustSub(t fs.FS, prefix string) fs.FS {
+	s, err := fs.Sub(t, prefix)
+	if err != nil {
+		panic(fmt.Errorf("Error creating sub-filesystem: %w", err))
+	}
+	return s
+}
-- 
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