add --mac-metadata test for --format zip - see libarchive#2041 (l…

…ibarchive#2045)

Submitting this test at the request of @kientzle on issue libarchive#2041.

Note that failure is currently expected, as the feature it tests is not
yet implemented!

Makefile.am

@@ -1126,6 +1126,7 @@ bsdtar_test_SOURCES= \
 	tar/test/test_format_newc.c \
 	tar/test/test_help.c \
 	tar/test/test_leading_slash.c \
+	tar/test/test_mac_metadata_zip.c \
 	tar/test/test_missing_file.c \
 	tar/test/test_option_C_mtree.c \
 	tar/test/test_option_C_upper.c \

tar/test/CMakeLists.txt

@@ -29,6 +29,7 @@ IF(ENABLE_TAR AND ENABLE_TEST)
     test_format_newc.c
     test_help.c
     test_leading_slash.c
+    test_mac_metadata_zip.c
     test_missing_file.c
     test_option_C_upper.c
     test_option_C_mtree.c

tar/test/test_mac_metadata_zip.c

@@ -0,0 +1,79 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 Martin Matuska
+ * All rights reserved.
+ */
+
+/*
+Notes on reffile creation:
+
+- I chose an existing small text file on my machine that had extended attributes.
+An easy way to generate one is to download a file from github in Google Chrome,
+as mac will automatically set a "com.apple.metadata:kMDItemWhereFroms" xattr on the file.
+It also would have worked to set an xattr manually using xattr -w [-rsx] attr_name attr_value file ...
+
+- to verify the names/values of xattrs, run: xattr -l filename
+
+- I then zipped the file using right-click > Compress in Finder
+(Apple's officially recommended method for zip file creation)
+
+- I then uuencoded the zip file by running: uuencode version.txt.zip test_mac_metadata_zip.zip
+
+Zip created 12-31-2023 on a 2022 Mac Studio running macOS Ventura 13.6.3 (22G436) (Apple M1 Ultra - arm64)
+
+Contents:
+ Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
+--------  ------  ------- ---- ---------- ----- --------  ----
+      15  Defl:N       17 -13% 09-21-2023 01:05 f542663d  version.txt
+    1038  Defl:N      668  36% 09-21-2023 01:05 85bdc448  __MACOSX/._version.txt
+--------          -------  ---                            -------
+    1053              685  35%                            2 files
+
+For additional notes, see: https://github.com/libarchive/libarchive/issues/2041#issuecomment-1873018929
+*/
+
+#include "test.h"
+
+DEFINE_TEST(test_mac_metadata_zip)
+{
+#if !defined(__APPLE__) || !defined(UF_COMPRESSED) || !defined(HAVE_SYS_XATTR_H)\
+	|| !defined(HAVE_ZLIB_H)
+	skipping("MacOS-specific Mac Metadata test");
+#else
+	const char *reffile = "test_mac_metadata_zip.zip";
+
+	const char *testattr = "com.apple.metadata:kMDItemWhereFroms";
+	void *readval_orig;
+	void *readval;
+	size_t size;
+	int r;
+
+	extract_reference_file(reffile);
+
+	/* Extract an archive to disk with mac metadata. */
+	assertMakeDir("mac_metadata", 0755);
+	r = systemf("%s -x -C mac_metadata --mac-metadata -f %s >mac_metadata.out 2>mac_metadata.err", testprog, reffile);
+	assertEqualInt(r, 0);
+	assertFileSize("mac_metadata/version.txt", 15);
+	readval_orig = getXattr("mac_metadata/version.txt", testattr, &size);
+	assertEqualInt(size, 658);
+
+	/* Re-Archive with --mac-metadata --format zip */
+	assertMakeDir("mac_metadata/subdir", 0755);
+	r = systemf("%s --mac-metadata --format zip -cvf mac_metadata/subdir/archive.zip -C mac_metadata version.txt", testprog);
+	assertEqualInt(r, 0);
+	assertFileSize("mac_metadata/subdir/archive.zip", 1088);
+
+	/* Re-Extract with --mac-metadata, assert that xattr was preserved */
+	r = systemf("%s -x -C mac_metadata/subdir --mac-metadata -f mac_metadata/subdir/archive.zip >mac_metadata.out 2>mac_metadata.err", testprog);
+	assertEqualInt(r, 0);
+	assertFileSize("mac_metadata/subdir/version.txt", 15);
+	readval = getXattr("mac_metadata/subdir/version.txt", testattr, &size);
+	assertEqualInt(size, 658);
+
+	/* Assert that it is identical to original */
+	assertEqualMem(readval_orig, readval, size);
+	assertEqualFile("mac_metadata/version.txt", "mac_metadata/subdir/version.txt");
+#endif
+}

tar/test/test_mac_metadata_zip.zip.uu

@@ -0,0 +1,28 @@
+begin 644 test_mac_metadata_zip.zip
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+`
+end