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go-mtree
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This commit is contained in:
Vincent Batts 2018-08-13 23:09:49 -04:00
parent f34a2e0d2b
commit a072d6d6e7
2 changed files with 13 additions and 9 deletions
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6
check.go
View File

@ -5,18 +5,18 @@ package mtree
// If keywords is nil, the check all present in the DirectoryHierarchy
//
// This is equivalent to creating a new DirectoryHierarchy with Walk(root, nil,
// keywords, fs) and then doing a Compare(dh, newDh, keywords).
// keywords, fs) and then doing a Compare(dh, curDh, keywords).
func Check(root string, dh *DirectoryHierarchy, keywords []Keyword, fs FsEval) ([]InodeDelta, error) {
if keywords == nil {
keywords = dh.UsedKeywords()
}
newDh, err := Walk(root, nil, keywords, fs)
curDh, err := Walk(root, nil, keywords, fs)
if err != nil {
return nil, err
}
return Compare(dh, newDh, keywords)
return Compare(dh, curDh, keywords)
}
// TarCheck is the tar equivalent of checking a file hierarchy spec against a

16
compare.go
View File

@ -325,13 +325,17 @@ func compareEntry(oldEntry, newEntry Entry) ([]KeyDelta, error) {
// missing entries and the like). A missing or extra key is treated as a
// Modified type.
//
// If oldDh or newDh are empty, we assume they are a hierarchy that is
// If thisDh or thatDh are empty, we assume they are a hierarchy that is
// completely empty. This is purely for helping callers create synthetic
// InodeDeltas.
//
// Comparing this directory hierarchy to that directory hierarchy is that
// sometimes it has few than all files, or may not have directories, etc.,
// so lack of presence of entries in thisDh may not be reportable.
//
// NB: The order of the parameters matters (old, new) because Extra and
// Missing are considered as different discrepancy types.
func Compare(oldDh, newDh *DirectoryHierarchy, keys []Keyword) ([]InodeDelta, error) {
func Compare(thisDh, thatDh *DirectoryHierarchy, keys []Keyword) ([]InodeDelta, error) {
// Represents the new and old states for an entry.
type stateT struct {
Old *Entry
@ -343,8 +347,8 @@ func Compare(oldDh, newDh *DirectoryHierarchy, keys []Keyword) ([]InodeDelta, er
diffs := map[string]*stateT{}
// First, iterate over the old hierarchy. If nil, pretend it's empty.
if oldDh != nil {
for _, e := range oldDh.Entries {
if thisDh != nil {
for _, e := range thisDh.Entries {
if e.Type == RelativeType || e.Type == FullType {
path, err := e.Path()
if err != nil {
@ -365,8 +369,8 @@ func Compare(oldDh, newDh *DirectoryHierarchy, keys []Keyword) ([]InodeDelta, er
}
// Then, iterate over the new hierarchy. If nil, pretend it's empty.
if newDh != nil {
for _, e := range newDh.Entries {
if thatDh != nil {
for _, e := range thatDh.Entries {
if e.Type == RelativeType || e.Type == FullType {
path, err := e.Path()
if err != nil {