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*: entry linking and keyword filter

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Setting up sibling and parent relationships for entries, so they can be
easier to walk.

Also, making "keyword=value" easier to parse. This helps filtering.

Both of these ready us for checking/validating a hierarchy.

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
This commit is contained in:
Vincent Batts 2016-03-18 13:38:32 -04:00
parent ef9ba54f10
commit 3b6cb6e117
4 changed files with 91 additions and 20 deletions
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46
walk.go
View file

@ -12,12 +12,14 @@ import (
type ExcludeFunc func(path string, info os.FileInfo) bool
type dhCreator struct {
DH *DirectoryHierarchy
curSet []string
depth int
curDirNum int
DH *DirectoryHierarchy
curSet *Entry
curDir *Entry
curEnt *Entry
}
var defaultSetKeywords = []string{"type=file", "nlink=1", "flags=none", "mode=0664"}
//
// To be able to do a "walk" that produces an outcome with `/set ...` would
// need a more linear walk, which this can not ensure.
@ -36,13 +38,13 @@ func Walk(root string, exlcudes []ExcludeFunc, keywords []string) (*DirectoryHie
// handle the /set SpecialType
if info.IsDir() {
if len(creator.curSet) == 0 {
if creator.curSet == nil {
// set the initial /set keywords
e := Entry{
Name: "/set",
Type: SpecialType,
Pos: len(creator.DH.Entries),
Keywords: []string{"type=file", "nlink=1", "flags=none", "mode=0664"},
Keywords: keywordSelector(defaultSetKeywords, keywords),
}
for _, keyword := range SetKeywords {
if str, err := KeywordFuncs[keyword](path, info); err == nil && str != "" {
@ -51,9 +53,9 @@ func Walk(root string, exlcudes []ExcludeFunc, keywords []string) (*DirectoryHie
return err
}
}
creator.curSet = e.Keywords
creator.curSet = &e
creator.DH.Entries = append(creator.DH.Entries, e)
} else if len(creator.curSet) > 0 {
} else if creator.curSet != nil {
// check the attributes of the /set keywords and re-set if changed
klist := []string{}
for _, keyword := range SetKeywords {
@ -66,19 +68,20 @@ func Walk(root string, exlcudes []ExcludeFunc, keywords []string) (*DirectoryHie
needNewSet := false
for _, k := range klist {
if !inSlice(k, creator.curSet) {
if !inSlice(k, creator.curSet.Keywords) {
needNewSet = true
}
}
if needNewSet {
creator.curSet = append([]string{"type=file", "nlink=1", "flags=none", "mode=0664"}, klist...)
creator.DH.Entries = append(creator.DH.Entries, Entry{
e := Entry{
Name: "/set",
Type: SpecialType,
Pos: len(creator.DH.Entries),
Keywords: creator.curSet,
})
Keywords: append(defaultSetKeywords, klist...),
}
creator.curSet = &e
creator.DH.Entries = append(creator.DH.Entries, e)
} else {
creator.DH.Entries = append(creator.DH.Entries, Entry{
Type: BlankType,
@ -91,16 +94,30 @@ func Walk(root string, exlcudes []ExcludeFunc, keywords []string) (*DirectoryHie
e := Entry{
Name: filepath.Base(path),
Pos: len(creator.DH.Entries),
Set: creator.curSet,
}
for _, keyword := range keywords {
if str, err := KeywordFuncs[keyword](path, info); err == nil && str != "" {
if !inSlice(str, creator.curSet) {
if !inSlice(str, creator.curSet.Keywords) {
e.Keywords = append(e.Keywords, str)
}
} else if err != nil {
return err
}
}
if info.IsDir() {
if creator.curDir != nil {
creator.curDir.Next = &e
}
e.Prev = creator.curDir
creator.curDir = &e
} else {
if creator.curEnt != nil {
creator.curEnt.Next = &e
}
e.Prev = creator.curEnt
creator.curEnt = &e
}
creator.DH.Entries = append(creator.DH.Entries, e)
return nil
})
@ -198,5 +215,4 @@ func readOrderedDirNames(dirname string) ([]string, error) {
sort.Strings(names)
sort.Strings(dirnames)
return append(names, dirnames...), nil
}