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https://github.com/opentffoundation/opentf.git
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068df07d11
Go 1.17 and earlier used a different syntax for build constraint comments, starting with "+build". Go 1.18 changed this to the modern "go:build" form as part of standardizing the structure of toolchain directive comments, and so for a while it was convention to include comments in both styles to allow building with both old and new Go compilers. However, Go 1.17 is no longer supported, and regardless of that we only expect OpenTofu to be built with the specific version we have selected in "go.mod" and ".go-version" anyway, so we no longer need the legacy form of these comments: the all supported Go toolchains now support the new form, which this commit retains. golangci-lint v2.6.0 includes a check for this legacy form, so removing this will also allow us to upgrade to a newer version of that linter aggregator in a future commit. Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
46 lines
1.5 KiB
Go
46 lines
1.5 KiB
Go
// Copyright (c) The OpenTofu Authors
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// SPDX-License-Identifier: MPL-2.0
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// Copyright (c) 2023 HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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//go:build windows
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package replacefile
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import (
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"os"
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"syscall"
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"golang.org/x/sys/windows"
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)
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// AtomicRename renames from the source path to the destination path,
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// atomically replacing any file that might already exist at the destination.
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//
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// Typically this operation can succeed only if the source and destination
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// are within the same physical filesystem, so this function is best reserved
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// for cases where the source and destination exist in the same directory and
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// only the local filename differs between them.
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func AtomicRename(source, destination string) error {
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// On Windows, renaming one file over another is not atomic and certain
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// error conditions can result in having only the source file and nothing
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// at the destination file. Instead, we need to call into the MoveFileEx
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// Windows API function, setting two flags to opt in to replacing an
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// existing file.
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srcPtr, err := syscall.UTF16PtrFromString(source)
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if err != nil {
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return &os.LinkError{"replace", source, destination, err}
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}
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destPtr, err := syscall.UTF16PtrFromString(destination)
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if err != nil {
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return &os.LinkError{"replace", source, destination, err}
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}
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flags := uint32(windows.MOVEFILE_REPLACE_EXISTING | windows.MOVEFILE_WRITE_THROUGH)
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err = windows.MoveFileEx(srcPtr, destPtr, flags)
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if err != nil {
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return &os.LinkError{"replace", source, destination, err}
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}
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return nil
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}
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