Brad Fitzpatrick
a3215f1f9d
Add new "webbrowser" and "colorable" feature tags so that the github.com/toqueteos/webbrowser and mattn/go-colorable packages can be excluded from minbox builds. Updates #12614 Change-Id: Iabd38b242f5a56aa10ef2050113785283f4e1fe8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
29 lines
765 B
Go
29 lines
765 B
Go
// Copyright (c) Tailscale Inc & contributors
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !ts_omit_colorable
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package cli
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import (
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"io"
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"os"
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"github.com/mattn/go-colorable"
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"github.com/mattn/go-isatty"
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)
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// colorableOutput returns a colorable writer if stdout is a terminal (not, say,
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// redirected to a file or pipe), the Stdout writer is os.Stdout (we're not
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// embedding the CLI in wasm or a mobile app), and NO_COLOR is not set (see
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// https://no-color.org/). If any of those is not the case, ok is false
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// and w is Stdout.
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func colorableOutput() (w io.Writer, ok bool) {
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if Stdout != os.Stdout ||
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os.Getenv("NO_COLOR") != "" ||
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!isatty.IsTerminal(os.Stdout.Fd()) {
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return Stdout, false
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}
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return colorable.NewColorableStdout(), true
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}
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