/
vfs.go
212 lines (183 loc) · 4.63 KB
/
vfs.go
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// 版权 @2021 凹语言 作者。保留所有权利。
package loader
import (
"bytes"
"errors"
"io"
"os"
"path"
"path/filepath"
"strings"
"testing/fstest"
"wa-lang.org/wa/internal/ast/astutil"
"wa-lang.org/wa/internal/config"
"wa-lang.org/wa/internal/logger"
"wa-lang.org/wa/internal/parser"
"wa-lang.org/wa/internal/token"
"wa-lang.org/wa/waroot"
)
// 读取 embed 列表, 提前加载内嵌资源数据
func parseEmbedPathList(filename string, src interface{}) []string {
fset := token.NewFileSet()
f, err := parser.ParseFile(nil, fset, filename, src, parser.ParseComments)
if err != nil {
return nil
}
var ss []string
for _, doc := range f.Comments {
if info := astutil.ParseCommentInfo(doc); info.Embed != "" {
ss = append(ss, info.Embed)
}
}
return ss
}
// 根据路径加载需要的 vfs 和 manifest
func loadProgramFileMeta(cfg *config.Config, filename string, src interface{}) (
vfs *config.PkgVFS,
manifest *config.Manifest,
err error,
) {
logger.Tracef(&config.EnableTrace_loader, "cfg: %+v", cfg)
logger.Tracef(&config.EnableTrace_loader, "filename: %s", filename)
// 读取代码
srcData, err := readSource(filename, src)
if err != nil {
return nil, nil, err
}
// 尝试加载本地的 manifest
manifest, err = config.LoadManifest(nil, filepath.Dir(filename))
if err != nil {
err = nil // 忽略错误
}
// 重新构造 manifest
if manifest == nil {
manifest = &config.Manifest{
Root: "__main__",
MainPkg: "__main__",
Pkg: config.Manifest_package{
Name: filepath.Base(filename),
Pkgpath: "__main__",
},
}
}
logger.Tracef(&config.EnableTrace_loader, "manifest: %s", manifest.JSONString())
// 构造入口文件
vfs = new(config.PkgVFS)
if vfs.App == nil {
mapFS := fstest.MapFS{
filepath.Base(filename): &fstest.MapFile{
Data: srcData,
},
}
// read embed list, and read file data
embedList := parseEmbedPathList(filename, string(srcData))
for _, name := range embedList {
localpath := filepath.Join(filepath.Dir(filename), name)
if data, err := os.ReadFile(localpath); err == nil {
mapFS[path.Join(manifest.MainPkg, name)] = &fstest.MapFile{
Data: data,
}
}
}
vfs.App = mapFS
}
if vfs.Std == nil {
if cfg.WaRoot != "" {
vfs.Std = os.DirFS(filepath.Join(cfg.WaRoot, "src"))
} else {
vfs.Std = waroot.GetFS()
}
}
if vfs.Vendor == nil {
if src == nil {
vfs.Vendor = os.DirFS(filepath.Join(manifest.Root, "vendor"))
}
if vfs.Vendor == nil {
vfs.Vendor = make(fstest.MapFS) // empty fs
}
}
return
}
// 根据路径加载需要的 vfs 和 manifest
func loadProgramMeta(cfg *config.Config, appPath string) (
vfs *config.PkgVFS,
manifest *config.Manifest,
err error,
) {
logger.Tracef(&config.EnableTrace_loader, "cfg: %+v", cfg)
logger.Tracef(&config.EnableTrace_loader, "appPath: %s", appPath)
if waroot.IsStdPkg(appPath) {
manifest = &config.Manifest{
Root: "",
MainPkg: appPath,
IsStd: true,
Pkg: config.Manifest_package{
Name: appPath[strings.LastIndex(appPath, "/")+1:],
Pkgpath: appPath,
},
}
vfs = new(config.PkgVFS)
if cfg.WaRoot != "" {
vfs.Std = os.DirFS(filepath.Join(cfg.WaRoot, "src"))
} else {
vfs.Std = waroot.GetFS()
}
return
}
manifest, err = config.LoadManifest(nil, appPath)
if err != nil {
logger.Tracef(&config.EnableTrace_loader, "err: %v", err)
return nil, nil, err
}
logger.Tracef(&config.EnableTrace_loader, "manifest: %s", manifest.JSONString())
vfs = new(config.PkgVFS)
if vfs.App == nil {
vfs.App = os.DirFS(filepath.Join(manifest.Root, "src"))
}
if vfs.Std == nil {
if cfg.WaRoot != "" {
vfs.Std = os.DirFS(filepath.Join(cfg.WaRoot, "src"))
} else {
vfs.Std = waroot.GetFS()
}
}
if vfs.Vendor == nil {
vfs.Vendor = os.DirFS(filepath.Join(manifest.Root, "vendor"))
if vfs.Vendor == nil {
vfs.Vendor = make(fstest.MapFS) // empty fs
}
}
return
}
func readSource(filename string, src interface{}) ([]byte, error) {
if src != nil {
switch s := src.(type) {
case string:
return []byte(s), nil
case []byte:
return s, nil
case *bytes.Buffer:
if s != nil {
return s.Bytes(), nil
}
case io.Reader:
d, err := io.ReadAll(s)
return d, err
}
return nil, errors.New("invalid source")
}
d, err := os.ReadFile(filename)
return d, err
}
func isWaFile(path string) bool {
if fi, err := os.Lstat(path); err == nil && fi.Mode().IsRegular() {
return strings.HasSuffix(strings.ToLower(path), ".wa")
}
return false
}
func isWzFile(path string) bool {
if fi, err := os.Lstat(path); err == nil && fi.Mode().IsRegular() {
return strings.HasSuffix(strings.ToLower(path), ".wz")
}
return false
}