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https://github.com/octoleo/restic.git
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b48f579530
The canUpdateStatus check was simplified in #2608, but it accidentally flipped the condition. The correct check is as follows: If the output is a pipe then restic probably runs in mintty/cygwin. In that case it's possible to update the output status. In all other cases it isn't. This commit inverts to condition again to offer the previous and correct behavior.
99 lines
2.9 KiB
Go
99 lines
2.9 KiB
Go
// +build windows
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package termstatus
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import (
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"io"
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"syscall"
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"unsafe"
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"golang.org/x/crypto/ssh/terminal"
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"golang.org/x/sys/windows"
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)
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// clearCurrentLine removes all characters from the current line and resets the
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// cursor position to the first column.
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func clearCurrentLine(wr io.Writer, fd uintptr) func(io.Writer, uintptr) {
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// easy case, the terminal is cmd or psh, without redirection
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if isWindowsTerminal(fd) {
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return windowsClearCurrentLine
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}
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// assume we're running in mintty/cygwin
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return posixClearCurrentLine
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}
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// moveCursorUp moves the cursor to the line n lines above the current one.
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func moveCursorUp(wr io.Writer, fd uintptr) func(io.Writer, uintptr, int) {
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// easy case, the terminal is cmd or psh, without redirection
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if isWindowsTerminal(fd) {
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return windowsMoveCursorUp
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}
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// assume we're running in mintty/cygwin
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return posixMoveCursorUp
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}
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var kernel32 = syscall.NewLazyDLL("kernel32.dll")
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var (
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procFillConsoleOutputCharacter = kernel32.NewProc("FillConsoleOutputCharacterW")
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procFillConsoleOutputAttribute = kernel32.NewProc("FillConsoleOutputAttribute")
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)
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// windowsClearCurrentLine removes all characters from the current line and
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// resets the cursor position to the first column.
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func windowsClearCurrentLine(wr io.Writer, fd uintptr) {
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var info windows.ConsoleScreenBufferInfo
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windows.GetConsoleScreenBufferInfo(windows.Handle(fd), &info)
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// clear the line
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cursor := windows.Coord{
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X: info.Window.Left,
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Y: info.CursorPosition.Y,
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}
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var count, w uint32
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count = uint32(info.Size.X)
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procFillConsoleOutputAttribute.Call(fd, uintptr(info.Attributes), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&w)))
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procFillConsoleOutputCharacter.Call(fd, uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&w)))
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}
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// windowsMoveCursorUp moves the cursor to the line n lines above the current one.
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func windowsMoveCursorUp(wr io.Writer, fd uintptr, n int) {
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var info windows.ConsoleScreenBufferInfo
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windows.GetConsoleScreenBufferInfo(windows.Handle(fd), &info)
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// move cursor up by n lines and to the first column
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windows.SetConsoleCursorPosition(windows.Handle(fd), windows.Coord{
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X: 0,
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Y: info.CursorPosition.Y - int16(n),
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})
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}
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// isWindowsTerminal return true if the file descriptor is a windows terminal (cmd, psh).
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func isWindowsTerminal(fd uintptr) bool {
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return terminal.IsTerminal(int(fd))
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}
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func isPipe(fd uintptr) bool {
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typ, err := windows.GetFileType(windows.Handle(fd))
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return err == nil && typ == windows.FILE_TYPE_PIPE
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}
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// canUpdateStatus returns true if status lines can be printed, the process
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// output is not redirected to a file or pipe.
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func canUpdateStatus(fd uintptr) bool {
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// easy case, the terminal is cmd or psh, without redirection
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if isWindowsTerminal(fd) {
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return true
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}
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// check that the output file type is a pipe (0x0003)
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if !isPipe(fd) {
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return false
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}
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// assume we're running in mintty/cygwin
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return true
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}
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