/
io.go
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/
io.go
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/*
Copyright 2024 The Knative Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package term
import (
"io"
"os"
"golang.org/x/term"
"knative.dev/client-pkg/pkg/output/environment"
)
// IsReaderTerminal returns true if the given reader is a real terminal.
func IsReaderTerminal(r io.Reader) bool {
f, ok := r.(*os.File)
return ok && term.IsTerminal(int(f.Fd()))
}
// IsWriterTerminal returns true if the given writer is a real terminal.
func IsWriterTerminal(w io.Writer) bool {
f, ok := w.(*os.File)
return ok && term.IsTerminal(int(f.Fd()))
}
// IsFancy returns true if the given writer is a real terminal, or the color
// is forced by the environment variables.
func IsFancy(w io.Writer) bool {
if environment.ColorIsForced() {
return true
}
return !environment.NonColorRequested() && IsWriterTerminal(w)
}