Carlos Florêncio
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
//go:build windows
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package lifecycle
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import (
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"fmt"
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"os"
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"path/filepath"
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"golang.org/x/sys/windows"
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)
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func openGitExcludeNoFollow(gitDir string) (*os.File, error) {
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path := filepath.Join(gitDir, "info", "exclude")
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pathUTF16, err := windows.UTF16PtrFromString(path)
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if err != nil {
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return nil, err
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}
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// OPEN_REPARSE_POINT protects the final component. Intermediate junctions
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// rely on the earlier Lstat checks; atomic traversal would require NtCreateFile.
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handle, err := windows.CreateFile(
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pathUTF16,
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windows.GENERIC_READ|windows.FILE_APPEND_DATA,
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windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE|windows.FILE_SHARE_DELETE,
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nil,
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windows.OPEN_ALWAYS,
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windows.FILE_ATTRIBUTE_NORMAL|windows.FILE_FLAG_OPEN_REPARSE_POINT,
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0,
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)
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if err != nil {
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return nil, err
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}
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var info windows.ByHandleFileInformation
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if err := windows.GetFileInformationByHandle(handle, &info); err != nil {
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_ = windows.CloseHandle(handle)
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return nil, err
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}
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if info.FileAttributes&windows.FILE_ATTRIBUTE_REPARSE_POINT != 0 {
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_ = windows.CloseHandle(handle)
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return nil, fmt.Errorf("git exclude file is a reparse point")
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}
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file := os.NewFile(uintptr(handle), path)
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if file == nil {
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_ = windows.CloseHandle(handle)
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return nil, fmt.Errorf("create file from git exclude handle")
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}
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return file, nil
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}
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