77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package mtree
|
|
|
|
import (
|
|
"bufio"
|
|
"io"
|
|
"strings"
|
|
)
|
|
|
|
func ParseSpec(r io.Reader) (*DirectoryHierarchy, error) {
|
|
s := bufio.NewScanner(r)
|
|
i := int(0)
|
|
dh := DirectoryHierarchy{}
|
|
for s.Scan() {
|
|
str := s.Text()
|
|
e := Entry{Pos: i}
|
|
switch {
|
|
case strings.HasPrefix(str, "#"):
|
|
e.Raw = str
|
|
if strings.HasPrefix(str, "#mtree") {
|
|
e.Type = SignatureType
|
|
} else {
|
|
e.Type = CommentType
|
|
// from here, the comment could be "# key: value" metadata
|
|
// or a relative path hint
|
|
}
|
|
case str == "":
|
|
e.Type = BlankType
|
|
// nothing else to do here
|
|
case strings.HasPrefix(str, "/"):
|
|
e.Type = SpecialType
|
|
// collapse any escaped newlines
|
|
for {
|
|
if strings.HasSuffix(str, `\`) {
|
|
str = str[:len(str)-1]
|
|
s.Scan()
|
|
str += s.Text()
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
// parse the options
|
|
f := strings.Fields(str)
|
|
e.Name = f[0]
|
|
e.Keywords = f[1:]
|
|
case len(strings.Fields(str)) > 0 && strings.Fields(str)[0] == "..":
|
|
e.Type = DotDotType
|
|
e.Raw = str
|
|
// nothing else to do here
|
|
case len(strings.Fields(str)) > 0:
|
|
// collapse any escaped newlines
|
|
for {
|
|
if strings.HasSuffix(str, `\`) {
|
|
str = str[:len(str)-1]
|
|
s.Scan()
|
|
str += s.Text()
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
// parse the options
|
|
f := strings.Fields(str)
|
|
if strings.Contains(str, "/") {
|
|
e.Type = FullType
|
|
} else {
|
|
e.Type = RelativeType
|
|
}
|
|
e.Name = f[0]
|
|
e.Keywords = f[1:]
|
|
default:
|
|
// TODO(vbatts) log a warning?
|
|
continue
|
|
}
|
|
dh.Entries = append(dh.Entries, e)
|
|
i++
|
|
}
|
|
return &dh, s.Err()
|
|
}
|