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reference.go
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reference.go
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package sandbox
import (
lua "github.com/yuin/gopher-lua"
"github.com/regclient/regclient/types/ref"
)
func setupReference(s *Sandbox) {
s.setupMod(
luaReferenceName,
map[string]lua.LGFunction{
"new": s.newReference,
"close": s.closeReference,
"__tostring": s.referenceString,
},
map[string]map[string]lua.LGFunction{
"__index": {
"close": s.closeReference,
"digest": s.referenceGetSetDigest,
"tag": s.referenceGetSetTag,
},
},
)
}
// reference refers to a repository or image name
type reference struct {
r ref.Ref
}
// newReference creates a reference
func (s *Sandbox) newReference(ls *lua.LState) int {
err := s.ctx.Err()
if err != nil {
ls.RaiseError("Context error: %v", err)
}
r := s.checkReference(ls, 1)
ud := ls.NewUserData()
ud.Value = &reference{r: r.r}
ls.SetMetatable(ud, ls.GetTypeMetatable(luaReferenceName))
ls.Push(ud)
return 1
}
func (s *Sandbox) closeReference(ls *lua.LState) int {
err := s.ctx.Err()
if err != nil {
ls.RaiseError("Context error: %v", err)
}
r := s.checkReference(ls, 1)
err = s.rc.Close(s.ctx, r.r)
if err != nil {
ls.ArgError(1, "reference close failed: "+err.Error())
}
return 0
}
func (s *Sandbox) checkReference(ls *lua.LState, i int) *reference {
var r *reference
switch ls.Get(i).Type() {
case lua.LTString:
nr, err := ref.New(ls.CheckString(i))
if err != nil {
ls.ArgError(i, "reference parsing failed: "+err.Error())
}
r = &reference{r: nr}
case lua.LTUserData:
ud := ls.CheckUserData(i)
switch ud.Value.(type) {
case *reference:
r = ud.Value.(*reference)
case *sbManifest:
m := ud.Value.(*sbManifest)
r = &reference{r: m.r}
case *config:
c := ud.Value.(*config)
r = &reference{r: c.r}
default:
ls.ArgError(i, "reference expected")
}
default:
ls.ArgError(i, "reference expected")
}
return r
}
// func isReference(ls *lua.LState, i int) bool {
// if ls.Get(i).Type() != lua.LTUserData {
// return false
// }
// ud := ls.CheckUserData(i)
// if _, ok := ud.Value.(*reference); ok {
// return true
// }
// return false
// }
// referenceString converts a reference back to a common name
func (s *Sandbox) referenceString(ls *lua.LState) int {
r := s.checkReference(ls, 1)
ls.Push(lua.LString(r.r.CommonName()))
return 1
}
func (s *Sandbox) referenceGetSetDigest(ls *lua.LState) int {
r := s.checkReference(ls, 1)
if ls.GetTop() == 2 {
r.r.Digest = ls.CheckString(2)
return 0
}
ls.Push(lua.LString(r.r.Digest))
return 1
}
func (s *Sandbox) referenceGetSetTag(ls *lua.LState) int {
r := s.checkReference(ls, 1)
if ls.GetTop() == 2 {
r.r.Tag = ls.CheckString(2)
return 0
}
ls.Push(lua.LString(r.r.Tag))
return 1
}