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Previously the progress bar / status update interval used stdoutIsTerminal to determine whether it is possible to update the progress bar or not. However, its implementation differed from the detection within the backup command which included additional checks to detect the presence of mintty on Windows. mintty behaves like a terminal but uses pipes for communication. This adds stdoutCanUpdateStatus() which calls the same terminal detection code used by backup. This ensures that all commands consistently switch between interactive and non-interactive terminal mode. stdoutIsTerminal() now also returns true whenever stdoutCanUpdateStatus() does so. This is required to properly handle the special case of mintty.
36 lines
893 B
Go
36 lines
893 B
Go
// +build !windows
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package termstatus
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import (
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"io"
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"os"
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"golang.org/x/crypto/ssh/terminal"
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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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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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return posixMoveCursorUp
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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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if !terminal.IsTerminal(int(fd)) {
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return false
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}
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term := os.Getenv("TERM")
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if term == "" {
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return false
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}
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// TODO actually read termcap db and detect if terminal supports what we need
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return term != "dumb"
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}
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