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Enable sparseness only conditionally

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We can either preallocate storage for a file or sparsify it. This
detects a pack file as sparse if it contains an all zero block or
consists of only one block. As the file sparsification is just an
approximation, hide it behind a `--sparse` parameter.
This commit is contained in:
Michael Eischer
2022-08-07 17:26:46 +02:00
parent 3047bf611c
commit 5b6a77058a
9 changed files with 102 additions and 68 deletions
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6
internal/restorer/restorer_unix_test.go
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@@ -36,7 +36,7 @@ func TestRestorerRestoreEmptyHardlinkedFileds(t *testing.T) {
},
})
res, err := NewRestorer(context.TODO(), repo, id)
res, err := NewRestorer(context.TODO(), repo, id, false)
rtest.OK(t, err)
res.SelectFilter = func(item string, dstpath string, node *restic.Node) (selectedForRestore bool, childMayBeSelected bool) {
@@ -85,8 +85,9 @@ func TestRestorerSparseFiles(t *testing.T) {
arch := archiver.New(repo, target, archiver.Options{})
_, id, err := arch.Snapshot(context.Background(), []string{"/zeros"},
archiver.SnapshotOptions{})
rtest.OK(t, err)
res, err := NewRestorer(repo, id)
res, err := NewRestorer(context.TODO(), repo, id, true)
rtest.OK(t, err)
tempdir, cleanup := rtest.TempDir(t)
@@ -102,6 +103,7 @@ func TestRestorerSparseFiles(t *testing.T) {
content, err := ioutil.ReadFile(filename)
rtest.OK(t, err)
rtest.Equals(t, len(zeros[:]), len(content))
rtest.Equals(t, zeros[:], content)
fi, err := os.Stat(filename)