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util.go
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util.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 util
import (
"fmt"
"io"
"os"
"strings"
"github.com/coreos/rkt/Godeps/_workspace/src/github.com/appc/spec/pkg/acirenderer"
)
var debugEnabled bool
func Quote(l []string) []string {
var quoted []string
for _, s := range l {
quoted = append(quoted, fmt.Sprintf("%q", s))
}
return quoted
}
func ReverseImages(s acirenderer.Images) acirenderer.Images {
var o acirenderer.Images
for i := len(s) - 1; i >= 0; i-- {
o = append(o, s[i])
}
return o
}
func In(list []string, el string) bool {
return IndexOf(list, el) != -1
}
func IndexOf(list []string, el string) int {
for i, x := range list {
if el == x {
return i
}
}
return -1
}
func printTo(w io.Writer, i ...interface{}) {
s := fmt.Sprint(i...)
fmt.Fprintln(w, strings.TrimSuffix(s, "\n"))
}
func Warn(i ...interface{}) {
printTo(os.Stderr, i...)
}
func Info(i ...interface{}) {
printTo(os.Stderr, i...)
}
func Debug(i ...interface{}) {
if debugEnabled {
printTo(os.Stderr, i...)
}
}
func InitDebug() {
debugEnabled = true
}