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46 lines
1.3 KiB
46 lines
1.3 KiB
//go:build !windows
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/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package fileutil
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import (
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"io"
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"os"
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)
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// LockedAtomicWriteFile atomically writes a file to disk.
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//
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// On non-Windows platforms, this is a simple wrapper around AtomicWriteFile
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// since concurrent file access errors are not an issue on Unix-like systems.
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//
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// Returns true if the file was written, false if it already existed.
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func LockedAtomicWriteFile(filename string, reader io.Reader, mode os.FileMode) (bool, error) {
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// Check if the file already exists
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if _, err := os.Stat(filename); err == nil {
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// File already exists, skip writing
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return false, nil
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}
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// File doesn't exist, write it atomically
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if err := AtomicWriteFile(filename, reader, mode); err != nil {
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return false, err
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}
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return true, nil
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}
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