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utils.go
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/
utils.go
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// Copyright 2020 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package utils
import (
"os"
"path/filepath"
"runtime"
"time"
"sigs.k8s.io/kustomize/api/filesys"
"sigs.k8s.io/kustomize/api/konfig"
)
func GoBin() string {
return filepath.Join(runtime.GOROOT(), "bin", "go")
}
// DeterminePluginSrcRoot guesses where the user
// has her ${g}/${v}/$lower(${k})/${k}.go files.
func DeterminePluginSrcRoot(fSys filesys.FileSystem) (string, error) {
return konfig.FirstDirThatExistsElseError(
"source directory", fSys, []konfig.NotedFunc{
{
Note: "relative to unit test",
F: func() string {
return filepath.Clean(
filepath.Join(
os.Getenv("PWD"),
"..", "..",
konfig.RelPluginHome))
},
},
{
Note: "relative to unit test (internal pkg)",
F: func() string {
return filepath.Clean(
filepath.Join(
os.Getenv("PWD"),
"..", "..", "..", "..",
konfig.RelPluginHome))
},
},
{
Note: "relative to api package",
F: func() string {
return filepath.Clean(
filepath.Join(
os.Getenv("PWD"),
"..", "..", "..",
konfig.RelPluginHome))
},
},
{
Note: "old style $GOPATH",
F: func() string {
return filepath.Join(
os.Getenv("GOPATH"),
"src", konfig.DomainName,
konfig.ProgramName, konfig.RelPluginHome)
},
},
{
Note: "HOME with literal 'gopath'",
F: func() string {
return filepath.Join(
konfig.HomeDir(), "gopath",
"src", konfig.DomainName,
konfig.ProgramName, konfig.RelPluginHome)
},
},
{
Note: "home directory",
F: func() string {
return filepath.Join(
konfig.HomeDir(), konfig.DomainName,
konfig.ProgramName, konfig.RelPluginHome)
},
},
})
}
// FileYoungerThan returns true if the file both exists and has an
// age is <= the Duration argument.
func FileYoungerThan(path string, d time.Duration) bool {
fi, err := os.Stat(path)
if err != nil {
if os.IsNotExist(err) {
return false
}
}
return time.Since(fi.ModTime()) <= d
}
// FileModifiedAfter returns true if the file both exists and was
// modified after the given time..
func FileModifiedAfter(path string, t time.Time) bool {
fi, err := os.Stat(path)
if err != nil {
if os.IsNotExist(err) {
return false
}
}
return fi.ModTime().After(t)
}
func FileExists(path string) bool {
if _, err := os.Stat(path); err != nil {
if os.IsNotExist(err) {
return false
}
}
return true
}