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Survive indexing dead symlinks (#2645)

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* survive indexing branches that start with a bad symlink

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* add log statement

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
This commit is contained in:
Alex Goodman 2024-02-14 16:06:22 -05:00 committed by GitHub
parent a909e3cec9
commit 65cadda486
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3 changed files with 20 additions and 0 deletions
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7
syft/internal/fileresolver/directory_indexer.go
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@ -176,6 +176,13 @@ func isRealPath(root string) (bool, error) {
func (r *directoryIndexer) indexBranch(root string, stager *progress.Stage) ([]string, error) {
rootRealPath, err := filepath.EvalSymlinks(root)
if err != nil {
var pathErr *os.PathError
if errors.As(err, &pathErr) {
// we can't index the path, but we shouldn't consider this to be fatal
// TODO: known-unknowns
log.WithFields("root", root, "error", err).Trace("unable to evaluate symlink while indexing branch")
return nil, nil
}
return nil, err
}

12
syft/internal/fileresolver/directory_indexer_test.go
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@ -222,6 +222,18 @@ func TestDirectoryIndexer_index(t *testing.T) {
}
}
func TestDirectoryIndexer_index_survive_badSymlink(t *testing.T) {
// test-fixtures/bad-symlinks
// ├── root
// │ ├── place
// │ │ └── fd -> ../somewhere/self/fd
// │ └── somewhere
// ...
indexer := newDirectoryIndexer("test-fixtures/bad-symlinks/root/place/fd", "test-fixtures/bad-symlinks/root/place/fd")
_, _, err := indexer.build()
require.NoError(t, err)
}
func TestDirectoryIndexer_SkipsAlreadyVisitedLinkDestinations(t *testing.T) {
var observedPaths []string
pathObserver := func(_, p string, _ os.FileInfo, _ error) error {

1
syft/internal/fileresolver/test-fixtures/bad-symlinks/root/place/fd Symbolic link
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@ -0,0 +1 @@
../somewhere/self/fd