prysm-pulse/shared/fileutil/fileutil.go
Raul Jordan cbc27e0f2e
Refactor Wallet Password Handling, Preventing Wallet Corruption (#6933)
* wallet should no longer deal with account passwords
* ensure tests are fixed
* Merge branch 'master' into corrupted-pass
* move mnemonic logic into right place
* rem fmts
* add fileutil
* gazelle
* imports
* move seed logic to derived
* fix tests
* imports
* gaz
* Merge refs/heads/master into corrupted-pass
* merge confs
* Merge refs/heads/master into corrupted-pass
* ivan's feedback
* Merge branch 'corrupted-pass' of github.com:prysmaticlabs/prysm into corrupted-pass
* gaz
* fix shared test
* Merge refs/heads/master into corrupted-pass
* resolve conflicts
* fix test build
2020-08-10 18:54:40 +00:00

77 lines
1.7 KiB
Go

package fileutil
import (
"io/ioutil"
"os"
"os/user"
"path"
"path/filepath"
"strings"
"github.com/pkg/errors"
)
// ExpandPath given a string which may be a relative path.
// 1. replace tilde with users home dir
// 2. expands embedded environment variables
// 3. cleans the path, e.g. /a/b/../c -> /a/c
// Note, it has limitations, e.g. ~someuser/tmp will not be expanded
func ExpandPath(p string) (string, error) {
if strings.HasPrefix(p, "~/") || strings.HasPrefix(p, "~\\") {
if home := HomeDir(); home != "" {
p = home + p[1:]
}
}
return filepath.Abs(path.Clean(os.ExpandEnv(p)))
}
// HomeDir for a user.
func HomeDir() string {
if home := os.Getenv("HOME"); home != "" {
return home
}
if usr, err := user.Current(); err == nil {
return usr.HomeDir
}
return ""
}
// HasDir checks if a directory indeed exists at the specified path.
func HasDir(dirPath string) (bool, error) {
fullPath, err := ExpandPath(dirPath)
if err != nil {
return false, err
}
info, err := os.Stat(fullPath)
if os.IsNotExist(err) {
return false, nil
}
if info == nil {
return false, err
}
return info.IsDir(), err
}
// FileExists returns true if a file is not a directory and exists
// at the specified path.
func FileExists(filename string) bool {
filePath, err := ExpandPath(filename)
if err != nil {
return false
}
info, err := os.Stat(filePath)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}
// ReadFileAsBytes expands a file name's absolute path and reads it as bytes from disk.
func ReadFileAsBytes(filename string) ([]byte, error) {
filePath, err := ExpandPath(filename)
if err != nil {
return nil, errors.Wrap(err, "could not determine absolute path of password file")
}
return ioutil.ReadFile(filePath)
}