fs: add MustSubv0.6.1

1 files changed, 14 insertions, 0 deletions

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
+}