32 lines
650 B
Go
32 lines
650 B
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package main
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import (
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"io"
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"os"
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"github.com/zeebo/errs"
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)
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func runWithOutput(output string, fn func(io.Writer) error) (err error) {
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if output == "" {
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return fn(os.Stdout)
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}
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outputTmp := output + ".tmp"
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file, err := os.Create(outputTmp)
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if err != nil {
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return errs.New("unable to create temporary output file: %v", err)
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}
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err = errs.Combine(err, fn(file))
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err = errs.Combine(err, file.Close())
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if err == nil {
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err = errs.Combine(err, os.Rename(outputTmp, output))
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}
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if err != nil {
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return errs.Combine(err, os.Remove(outputTmp))
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}
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return err
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}
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