mirror of
https://github.com/vbatts/go-mtree.git
synced 2024-11-22 08:25:38 +00:00
65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
package mtree
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// DirectoryHierarchy is the mapped structure for an mtree directory hierarchy
|
|
// spec
|
|
type DirectoryHierarchy struct {
|
|
Entries []Entry
|
|
}
|
|
|
|
// WriteTo simplifies the output of the resulting hierarchy spec
|
|
func (dh DirectoryHierarchy) WriteTo(w io.Writer) (n int64, err error) {
|
|
sort.Sort(byPos(dh.Entries))
|
|
var sum int64
|
|
for _, e := range dh.Entries {
|
|
i, err := io.WriteString(w, e.String()+"\n")
|
|
if err != nil {
|
|
return sum, err
|
|
}
|
|
sum += int64(i)
|
|
}
|
|
return sum, nil
|
|
}
|
|
|
|
type byPos []Entry
|
|
|
|
func (bp byPos) Len() int { return len(bp) }
|
|
func (bp byPos) Less(i, j int) bool { return bp[i].Pos < bp[j].Pos }
|
|
func (bp byPos) Swap(i, j int) { bp[i], bp[j] = bp[j], bp[i] }
|
|
|
|
// Entry is each component of content in the mtree spec file
|
|
type Entry struct {
|
|
Pos int // order in the spec
|
|
Raw string // file or directory name
|
|
Name string // file or directory name
|
|
Keywords []string // TODO(vbatts) maybe a keyword typed set of values?
|
|
Type EntryType
|
|
}
|
|
|
|
func (e Entry) String() string {
|
|
if e.Raw != "" {
|
|
return e.Raw
|
|
}
|
|
// TODO(vbatts) if type is RelativeType and a keyword of not type=dir
|
|
return fmt.Sprintf("%s %s", e.Name, strings.Join(e.Keywords, " "))
|
|
}
|
|
|
|
// EntryType are the formats of lines in an mtree spec file
|
|
type EntryType int
|
|
|
|
// The types of lines to be found in an mtree spec file
|
|
const (
|
|
SignatureType EntryType = iota // first line of the file, like `#mtree v2.0`
|
|
BlankType // blank lines are ignored
|
|
CommentType // Lines beginning with `#` are ignored
|
|
SpecialType // line that has `/` prefix issue a "special" command (currently only /set and /unset)
|
|
RelativeType // if the first white-space delimited word does not have a '/' in it. Options/keywords are applied.
|
|
DotDotType // .. - A relative path step. keywords/options are ignored
|
|
FullType // if the first word on the line has a `/` after the first character, it interpretted as a file pathname with options
|
|
)
|