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// Copyright 2020 CUE 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 path
// OS must be a valid [runtime.GOOS] value or "unix".
type OS string
const (
Unix OS = "unix"
Windows OS = "windows"
Plan9 OS = "plan9"
)
// These types have been designed to minimize the diffs with the original Go
// code, thereby minimizing potential toil in keeping them up to date.
type os struct {
osInfo
Separator byte
ListSeparator byte
}
func (o os) isWindows() bool {
return o.Separator == '\\'
}
type osInfo interface {
IsPathSeparator(b byte) bool
splitList(path string) []string
volumeNameLen(path string) int
IsAbs(path string) (b bool)
HasPrefix(p, prefix string) bool
join(elem []string) string
sameWord(a, b string) bool
}
func getOS(o OS) os {
switch o {
case Windows:
return windows
case Plan9:
return plan9
default:
return unix
}
}
var (
plan9 = os{
osInfo: &plan9Info{},
Separator: plan9Separator,
ListSeparator: plan9ListSeparator,
}
unix = os{
osInfo: &unixInfo{},
Separator: unixSeparator,
ListSeparator: unixListSeparator,
}
windows = os{
osInfo: &windowsInfo{},
Separator: windowsSeparator,
ListSeparator: windowsListSeparator,
}
)
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