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filepath.go
58 lines (51 loc) · 1.38 KB
/
filepath.go
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/*
Copyright 2014 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 pkg
import (
"os"
"os/user"
"path/filepath"
"strings"
"github.com/coreos/fleet/log"
)
// ParseFilepath expands ~ and ~user constructions.
// If user or $HOME is unknown, do nothing.
func ParseFilepath(path string) string {
if !strings.HasPrefix(path, "~") {
return path
}
i := strings.Index(path, "/")
if i < 0 {
i = len(path)
}
var home string
if i == 1 {
if home = os.Getenv("HOME"); home == "" {
usr, err := user.Current()
if err != nil {
log.V(1).Infof("Failed to get current home directory: %v", err)
return path
}
home = usr.HomeDir
}
} else {
usr, err := user.Lookup(path[1:i])
if err != nil {
log.V(1).Infof("Failed to get %v's home directory: %v", path[1:i], err)
return path
}
home = usr.HomeDir
}
path = filepath.Join(home, path[i:])
return path
}