decompressor_tgz: handle symlinks and links (hardlinks)

decompress_tgz.go

@@ -80,6 +80,26 @@ func (d *TarGzipDecompressor) Decompress(dst, src string, dir bool) error {
 		// Mark that we're done so future in single file mode errors
 		done = true
 
+		if (hdr.Typeflag == tar.TypeSymlink) {
+			// If the type is a symlink we re-write it and
+			// continue instead of attempting to copy the contents
+			if err := os.Symlink(hdr.Linkname, path); err != nil {
+				return fmt.Errorf("failed writing symbolic link: %s", err)
+			}
+
+			continue
+		}
+
+		if (hdr.Typeflag == tar.TypeLink) {
+			// If the type is a link ("hardlink") we re-write it and
+			// continue instead of attempting to copy the contents
+			if err := os.Link(hdr.Linkname, path); err != nil {
+				return fmt.Errorf("failed writing link: %s", err)
+			}
+
+			continue
+		}
+
 		// Open the file for writing
 		dstF, err := os.Create(path)
 		if err != nil {

decompress_tgz_test.go

@@ -61,6 +61,22 @@ func TestTarGzipDecompressor(t *testing.T) {
 			multiplePaths,
 			"",
 		},
+
+		{
+			"with-symlinks.tar.gz",
+			true,
+			false,
+			[]string{"bar", "baz", "foo"},
+			"",
+		},
+
+		{
+			"with-links.tar.gz",
+			true,
+			false,
+			[]string{"foo", "bar"},
+			"",
+		},
 	}
 
 	for i, tc := range cases {