Merge pull request #3704 from MichaelEischer/compression-migrations

Support migration to repository format with compression

internal/restic/backend.go

@@ -24,6 +24,9 @@ type Backend interface {
 	// Hasher may return a hash function for calculating a content hash for the backend
 	Hasher() hash.Hash
 
+	// HasAtomicReplace returns whether Save() can atomically replace files
+	HasAtomicReplace() bool
+
 	// Test a boolean value whether a File with the name and type exists.
 	Test(ctx context.Context, h Handle) (bool, error)
 

internal/restic/config.go

@@ -23,7 +23,7 @@ const MaxRepoVersion = 2
 
 // StableRepoVersion is the version that is written to the config when a repository
 // is newly created with Init().
-const StableRepoVersion = 1
+const StableRepoVersion = 2
 
 // JSONUnpackedLoader loads unpacked JSON.
 type JSONUnpackedLoader interface {