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Use array instead of hash for backend.ID

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Since backend.ID is always a slice of constant length, use an array
instead of a slice. Mostly, arrays behave as slices, except that an
array cannot be nil, so use `*backend.ID` insteaf of `backend.ID` in
places where the absence of an ID is possible (e.g. for the Subtree of a
Node, which may not present when the node is a file node).

This change allows to directly use backend.ID as the the key for a map,
so that arbitrary data structures (e.g. a Set implemented as a
map[backend.ID]struct{}) can easily be formed.
This commit is contained in:
Alexander Neumann
2015-07-25 17:05:45 +02:00
parent 2fa6124545
commit 5cdcc99eba
31 changed files with 244 additions and 208 deletions
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2
test/backend.go
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@@ -81,7 +81,7 @@ func TeardownRepo(repo *repository.Repository) {
}
}
func SnapshotDir(t testing.TB, repo *repository.Repository, path string, parent backend.ID) *restic.Snapshot {
func SnapshotDir(t testing.TB, repo *repository.Repository, path string, parent *backend.ID) *restic.Snapshot {
arch := restic.NewArchiver(repo)
sn, _, err := arch.Snapshot(nil, []string{path}, parent)
OK(t, err)