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compare: export official way to modify InodeDelta.Diff

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At the moment, filtering out keyword changes from an InodeDelta after
doing Compare is a little complicated and error-prone. The simplest
solution is to allow for callers to access a pointer to the underlying
slice so it can be modified properly.

The filtering logic in the gomtree command-line implicitly depends on
the behaviour of InodeDelta.Diff -- DiffPtr would be a far more
appropriate replacement.

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
This commit is contained in:
Aleksa Sarai 2025-09-16 18:23:15 +10:00
parent d02f298ad4
commit 02df712987
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2 changed files with 20 additions and 13 deletions
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11
compare.go
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@ -77,6 +77,17 @@ func (i InodeDelta) Diff() []KeyDelta {
return i.keys
}
// DiffPtr returns a pointer to the internal slice that would be returned by
// [InodeDelta.Diff]. This is intended to be used by tools which need to filter
// aspects of [InodeDelta] entries. If the [DifferenceType] of the inode is not
// [Modified], then DiffPtr returns nil.
func (i *InodeDelta) DiffPtr() *[]KeyDelta {
if i.diff == Modified {
return &i.keys
}
return nil
}
// Old returns the value of the inode Entry in the "old" DirectoryHierarchy (as
// determined by the ordering of parameters to Compare).
func (i InodeDelta) Old() *Entry {