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jfa-go/external.go

52 lines
1.1 KiB

// +build external
package main
import (
"io/fs"
"log"
"os"
"path/filepath"
"strings"
)
const binaryType = "external"
var localFS dirFS
var langFS dirFS
// When using os.DirFS, even on Windows the separator seems to be '/'.
// func FSJoin(elem ...string) string { return filepath.Join(elem...) }
func FSJoin(elem ...string) string {
sep := "/"
if strings.Contains(elem[0], "\\") {
sep = "\\"
}
path := ""
for _, el := range elem {
path += el + sep
}
return strings.TrimSuffix(path, sep)
}
type dirFS string
func (dir dirFS) Open(name string) (fs.File, error) {
return os.Open(string(dir) + "/" + name)
}
func (dir dirFS) ReadFile(name string) ([]byte, error) {
return os.ReadFile(string(dir) + "/" + name)
}
func (dir dirFS) ReadDir(name string) ([]fs.DirEntry, error) {
return os.ReadDir(string(dir) + "/" + name)
}
func loadFilesystems() {
log.Println("Using external storage")
executable, _ := os.Executable()
localFS = dirFS(filepath.Join(filepath.Dir(executable), "data"))
langFS = dirFS(filepath.Join(filepath.Dir(executable), "data", "lang"))
}