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moby--moby/pkg/term/windows/console.go
Vincent Demeester 3409de971c Lint pkg/term/windows package
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
2015-09-03 22:25:52 +02:00

61 lines
1.4 KiB
Go

// +build windows
package windows
import (
"io"
"os"
"syscall"
"github.com/Azure/go-ansiterm/winterm"
)
// ConsoleStreams returns a wrapped version for each standard stream referencing a console,
// that handles ANSI character sequences.
func ConsoleStreams() (stdIn io.ReadCloser, stdOut, stdErr io.Writer) {
if IsConsole(os.Stdin.Fd()) {
stdIn = newAnsiReader(syscall.STD_INPUT_HANDLE)
} else {
stdIn = os.Stdin
}
if IsConsole(os.Stdout.Fd()) {
stdOut = newAnsiWriter(syscall.STD_OUTPUT_HANDLE)
} else {
stdOut = os.Stdout
}
if IsConsole(os.Stderr.Fd()) {
stdErr = newAnsiWriter(syscall.STD_ERROR_HANDLE)
} else {
stdErr = os.Stderr
}
return stdIn, stdOut, stdErr
}
// GetHandleInfo returns file descriptor and bool indicating whether the file is a console.
func GetHandleInfo(in interface{}) (uintptr, bool) {
switch t := in.(type) {
case *ansiReader:
return t.Fd(), true
case *ansiWriter:
return t.Fd(), true
}
var inFd uintptr
var isTerminal bool
if file, ok := in.(*os.File); ok {
inFd = file.Fd()
isTerminal = IsConsole(inFd)
}
return inFd, isTerminal
}
// IsConsole returns true if the given file descriptor is a Windows Console.
// The code assumes that GetConsoleMode will return an error for file descriptors that are not a console.
func IsConsole(fd uintptr) bool {
_, e := winterm.GetConsoleMode(fd)
return e == nil
}