From 16d00870eff7efee2692a32bd6c5aaa56aac5e9a Mon Sep 17 00:00:00 2001
From: Derek McGowan <derek@mcgstyle.net>
Date: Tue, 28 Nov 2017 16:18:15 -0800
Subject: [PATCH] Add test for prefix header issue

Signed-off-by: Derek McGowan <derek@mcgstyle.net>
---
 archive/issues_test.go | 47 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 archive/issues_test.go

diff --git a/archive/issues_test.go b/archive/issues_test.go
new file mode 100644
index 000000000..65e9f2b6c
--- /dev/null
+++ b/archive/issues_test.go
@@ -0,0 +1,47 @@
+package archive
+
+import (
+	"bytes"
+	"context"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/containerd/containerd/archive/compression"
+	"github.com/containerd/containerd/testutil"
+)
+
+// TestPrefixHeaderReadable tests that files that could be created with the
+// version of this package that was built with <=go17 are still readable.
+func TestPrefixHeaderReadable(t *testing.T) {
+	testutil.RequiresRoot(t)
+
+	// https://gist.github.com/stevvooe/e2a790ad4e97425896206c0816e1a882#file-out-go
+	var testFile = []byte("\x1f\x8b\x08\x08\x44\x21\x68\x59\x00\x03\x74\x2e\x74\x61\x72\x00\x4b\xcb\xcf\x67\xa0\x35\x30\x80\x00\x86\x06\x10\x47\x01\xc1\x37\x40\x00\x54\xb6\xb1\xa1\xa9\x99\x09\x48\x25\x1d\x40\x69\x71\x49\x62\x91\x02\xe5\x76\xa1\x79\x84\x21\x91\xd6\x80\x72\xaf\x8f\x82\x51\x30\x0a\x46\x36\x00\x00\xf0\x1c\x1e\x95\x00\x06\x00\x00")
+
+	tmpDir, err := ioutil.TempDir("", "prefix-test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	r, err := compression.DecompressStream(bytes.NewReader(testFile))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer r.Close()
+	_, err = Apply(context.Background(), tmpDir, r)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	baseName := "foo"
+	pth := strings.Repeat("a", 100-len(baseName)) + "/" + baseName
+
+	_, err = os.Lstat(filepath.Join(tmpDir, pth))
+	if err != nil {
+		t.Fatal(err)
+	}
+}