pkger/index.go

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package pkger
import (
"fmt"
"os"
"path/filepath"
"strings"
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"sync"
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"time"
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"github.com/gobuffalo/here"
)
type index struct {
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Files *filesMap `json:"files"`
Infos *infosMap `json:"infos"`
Paths *pathsMap `json:"paths"`
Current here.Info `json:"current"`
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once sync.Once
}
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func (i *index) Parse(p string) (Path, error) {
pt, ok := i.Paths.Load(p)
if ok {
return pt, nil
}
if len(p) == 0 {
return build(p, "", "")
}
res := pathrx.FindAllStringSubmatch(p, -1)
if len(res) == 0 {
return pt, fmt.Errorf("could not parse %q", p)
}
matches := res[0]
if len(matches) != 4 {
return pt, fmt.Errorf("could not parse %q", p)
}
return build(p, matches[1], matches[3])
return rootIndex.Parse(p)
}
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func (i *index) Info(p string) (here.Info, error) {
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info, ok := i.Infos.Load(p)
if ok {
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return info, nil
}
info, err := here.Cache(p, here.Package)
if err != nil {
return info, err
}
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i.Infos.Store(p, info)
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return info, nil
}
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func (i *index) Stat() (here.Info, error) {
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i.once.Do(func() {
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i.Current, _ = here.Cache("", func(string) (here.Info, error) {
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return here.Current()
})
})
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return i.Current, nil
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}
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func (i *index) Create(pt Path) (*File, error) {
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her, err := Info(pt.Pkg)
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if err != nil {
return nil, err
}
f := &File{
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path: pt,
her: her,
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info: &FileInfo{
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name: strings.TrimPrefix(pt.Name, "/"),
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mode: 0666,
modTime: time.Now(),
},
}
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if i.Files == nil {
i.Files = &filesMap{}
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}
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i.Files.Store(pt, f)
return f, nil
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}
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// func (i *index) MarshalJSON() ([]byte, error) {
// m := map[string]interface{}{}
//
// m["files"] = i.Files
// m["infos"] = i.Infos
// m["current"] = i.Current
//
// b, err := json.Marshal(m)
// if err != nil {
// return nil, err
// }
//
// hep := hepa.New()
// hep = hepa.With(hep, filters.Golang())
// hep = hepa.With(hep, filters.Secrets())
// return hep.Filter(b)
// }
// func (i *index) UnmarshalJSON(b []byte) error {
// m := map[string]json.RawMessage{}
//
// if err := json.Unmarshal(b, &m); err != nil {
// return err
// }
//
// infos, ok := m["infos"]
// if !ok {
// return fmt.Errorf("missing infos")
// }
// i.Infos = &infosMap{}
// if err := json.Unmarshal(infos, i.Infos); err != nil {
// return err
// }
//
// files, ok := m["files"]
// if !ok {
// return fmt.Errorf("missing files")
// }
//
// i.Files = &filesMap{}
// if err := json.Unmarshal(files, i.Files); err != nil {
// return err
// }
//
// current, ok := m["current"]
// if !ok {
// return fmt.Errorf("missing current")
// }
// if err := json.Unmarshal(current, &i.Current); err != nil {
// return err
// }
// return nil
// }
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func (i index) Walk(pt Path, wf WalkFunc) error {
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var err error
i.Files.Range(func(k Path, v *File) bool {
if k.Pkg != pt.Pkg {
return true
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}
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if err = wf(k, v.info); err != nil {
return false
}
return true
})
if err != nil {
return err
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}
var info here.Info
if pt.Pkg == "." {
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info, err = Stat()
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if err != nil {
return err
}
pt.Pkg = info.ImportPath
}
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if info.IsZero() {
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info, err = Info(pt.Pkg)
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if err != nil {
return fmt.Errorf("%s: %s", pt, err)
}
}
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fp := filepath.Join(info.Dir, pt.Name)
err = filepath.Walk(fp, func(path string, fi os.FileInfo, err error) error {
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if err != nil {
return err
}
path = strings.TrimPrefix(path, info.Dir)
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pt, err := Parse(fmt.Sprintf("%s:%s", pt.Pkg, path))
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if err != nil {
return err
}
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return wf(pt, NewFileInfo(fi))
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})
return err
}
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func (i *index) Open(pt Path) (*File, error) {
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f, ok := i.Files.Load(pt)
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if !ok {
return i.openDisk(pt)
}
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nf := &File{
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info: f.info,
path: f.path,
data: f.data,
her: f.her,
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}
return nf, nil
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}
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func (i index) openDisk(pt Path) (*File, error) {
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info, err := Info(pt.Pkg)
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if err != nil {
return nil, err
}
fp := info.Dir
if len(pt.Name) > 0 {
fp = filepath.Join(fp, pt.Name)
}
fi, err := os.Stat(fp)
if err != nil {
return nil, err
}
f := &File{
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info: WithName(strings.TrimPrefix(pt.Name, "/"), NewFileInfo(fi)),
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her: info,
path: pt,
}
return f, nil
}
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func newIndex() *index {
return &index{
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Files: &filesMap{},
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Infos: &infosMap{},
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Paths: &pathsMap{},
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}
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}
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var rootIndex = func() *index {
i := newIndex()
return i
}()