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//go:build go1.16 && finder
// +build go1.16,finder
package viper
import (
"errors"
"io/fs"
"path"
)
type finder struct {
paths []string
fileNames []string
extensions []string
withoutExtension bool
}
func (f finder) Find(fsys fs.FS) (string, error) {
for _, searchPath := range f.paths {
for _, fileName := range f.fileNames {
for _, extension := range f.extensions {
filePath := path.Join(searchPath, fileName+"."+extension)
ok, err := fileExists(fsys, filePath)
if err != nil {
return "", err
}
if ok {
return filePath, nil
}
}
if f.withoutExtension {
filePath := path.Join(searchPath, fileName)
ok, err := fileExists(fsys, filePath)
if err != nil {
return "", err
}
if ok {
return filePath, nil
}
}
}
}
return "", nil
}
func fileExists(fsys fs.FS, filePath string) (bool, error) {
fileInfo, err := fs.Stat(fsys, filePath)
if err == nil {
return !fileInfo.IsDir(), nil
}
if errors.Is(err, fs.ErrNotExist) {
return false, nil
}
return false, err
}
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