func simpleCompound(pn *parse.Primary) (*parse.Compound, string) {
thisIndexing, ok := pn.Parent().(*parse.Indexing)
if !ok {
return nil, ""
}
thisCompound, ok := thisIndexing.Parent().(*parse.Compound)
if !ok {
return nil, ""
}
head := ""
for _, in := range thisCompound.Indexings {
if len(in.Indicies) > 0 {
return nil, ""
}
typ := in.Head.Type
if typ != parse.Bareword &&
typ != parse.SingleQuoted &&
typ != parse.DoubleQuoted {
return nil, ""
}
head += in.Head.Value
if in == thisIndexing {
break
}
}
return thisCompound, head
}
func primaryInSimpleCompound(pn *parse.Primary) (*parse.Compound, string) {
thisIndexing, ok := pn.Parent().(*parse.Indexing)
if !ok {
return nil, ""
}
thisCompound, ok := thisIndexing.Parent().(*parse.Compound)
if !ok {
return nil, ""
}
ok, head, _ := simpleCompound(thisCompound, thisIndexing)
if !ok {
return nil, ""
}
return thisCompound, head
}
func simpleCompound(pn *parse.Primary) (*parse.Compound, string) {
thisIndexing, ok := pn.Parent().(*parse.Indexing)
if !ok {
return nil, ""
}
thisCompound, ok := thisIndexing.Parent().(*parse.Compound)
if !ok {
return nil, ""
}
tilde := false
head := ""
for _, in := range thisCompound.Indexings {
if len(in.Indicies) > 0 {
return nil, ""
}
switch in.Head.Type {
case parse.Tilde:
tilde = true
case parse.Bareword, parse.SingleQuoted, parse.DoubleQuoted:
head += in.Head.Value
}
if in == thisIndexing {
break
}
}
if tilde {
i := strings.Index(head, "/")
if i == -1 {
return nil, ""
}
uname := head[:i]
home, err := osutil.GetHome(uname)
if err != nil {
// TODO report error
return nil, ""
}
head = home + head[i:]
}
return thisCompound, head
}