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writefs.go
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writefs.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package fnfs
import (
"bytes"
"context"
"io"
"io/fs"
"namespacelabs.dev/foundation/internal/bytestream"
"namespacelabs.dev/foundation/internal/ctxio"
)
type WriteFS interface {
OpenWrite(path string, mode fs.FileMode) (WriteFileHandle, error)
Remove(path string) error
}
type MkdirFS interface {
MkdirAll(path string, mode fs.FileMode) error
}
type RmdirFS interface {
RemoveAll(path string) error
}
type ChmodFS interface {
Chmod(path string, mode fs.FileMode) error
}
type WriteFileHandle interface {
io.WriteCloser
}
func WriteFile(ctx context.Context, fs WriteFS, path string, contents []byte, mode fs.FileMode) error {
w, err := fs.OpenWrite(path, mode.Perm())
if err != nil {
return err
}
_, writeErr := io.Copy(ctxio.WriterWithContext(ctx, w, nil), bytes.NewReader(contents))
closeErr := w.Close()
if writeErr != nil {
return writeErr
}
return closeErr
}
func WriteByteStream(ctx context.Context, fs WriteFS, path string, contents bytestream.ByteStream, mode fs.FileMode) error {
r, err := contents.Reader()
if err != nil {
return err
}
defer r.Close()
w, err := fs.OpenWrite(path, mode.Perm())
if err != nil {
return err
}
_, writeErr := io.Copy(ctxio.WriterWithContext(ctx, w, nil), r)
closeErr := w.Close()
if writeErr != nil {
return writeErr
}
return closeErr
}