Курнат Андрей
38 lines
819 B
Go
38 lines
819 B
Go
package fsx
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import (
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"github.com/spf13/afero"
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)
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var (
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// assert interfaces implemented
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_ afero.Fs = (*FallbackFS)(nil)
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_ FS = (*FallbackFS)(nil)
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)
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// FallbackFS is a filesystem that layers a primary filesystem on top of a secondary filesystem.
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type FallbackFS struct {
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FS
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primary *BaseFS
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secondary *BaseFS
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}
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// Primary returns the primary filesystem.
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func (d *FallbackFS) Primary() *BaseFS {
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return d.primary
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}
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// Secondary returns the secondary filesystem.
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func (d *FallbackFS) Secondary() *BaseFS {
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return d.secondary
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}
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// NewFallbackFS returns a new FallbackFS instance.
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func NewFallbackFS(primary, secondary FS) *FallbackFS {
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return &FallbackFS{
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FS: FromAfero(afero.NewCopyOnWriteFs(secondary, primary)),
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primary: &BaseFS{Fs: primary},
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secondary: &BaseFS{Fs: secondary},
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}
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}
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