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launch.go
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launch.go
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// SPDX-License-Identifier: GPL-3.0
// Copyright 2022 Pete Heist
package antler
import (
"embed"
"io"
"io/fs"
"path/filepath"
"sort"
"github.com/heistp/antler/node"
)
//go:embed node/bin/*
var nodeBin embed.FS
// nodeBinDir
const nodeBinDir = "node/bin"
// openNodeExe opens an embedded node executable for the given platform.
func openNodeExe(platform string) (fs.File, error) {
n := node.PlatformExeName(platform)
return nodeBin.Open(filepath.Join(nodeBinDir, n.String()))
}
// exeSource provides a node.ExeSource implementation for antler.
type exeSource struct {
}
// Reader implements ExeSource
func (e *exeSource) Reader(platform string) (io.ReadCloser, error) {
return openNodeExe(platform)
}
// Size implements ExeSource
func (e *exeSource) Size(platform string) (size int64, err error) {
var f fs.File
if f, err = openNodeExe(platform); err != nil {
return
}
var i fs.FileInfo
if i, err = f.Stat(); err != nil {
return
}
size = i.Size()
return
}
// Platforms implements ExeSource
func (e *exeSource) Platforms() (platforms []string, err error) {
var d []fs.DirEntry
if d, err = nodeBin.ReadDir(nodeBinDir); err != nil {
return
}
for _, e := range d {
n := node.ExeName(e.Name())
platforms = append(platforms, n.Platform())
}
sort.Strings(platforms)
return
}