selftest/wic: Add tests for --exclude-dir option.

Based partially on an earlier patch by Maciej Borzecki.

Note that because tools now reside in recipe specific sysroots, we
need to import the path from bitbake and apply it during the test.

(From OE-Core rev: c826233ad08ee5a4b9943a05d4e73f3fb3281588)

Signed-off-by: Kristian Amlie <kristian.amlie@mender.io>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/wic.py

@@ -339,6 +339,110 @@ class Wic(oeSelfTest):
         self.assertEqual(0, status)
         self.assertEqual(1, len(glob(self.resultdir + "%(wks)s-*.direct" % bbvars)))
 
+    def test_exclude_path(self):
+        """Test --exclude-path wks option."""
+
+        oldpath = os.environ['PATH']
+        os.environ['PATH'] = get_bb_var("PATH", "wic-tools")
+
+        try:
+            wks_file = 'temp.wks'
+            with open(wks_file, 'w') as wks:
+                rootfs_dir = get_bb_var('IMAGE_ROOTFS', 'core-image-minimal')
+                wks.write("""part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path usr
+part /usr --source rootfs --ondisk mmcblk0 --fstype=ext4 --rootfs-dir %s/usr
+part /etc --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/ --rootfs-dir %s/usr"""
+                          % (rootfs_dir, rootfs_dir))
+            self.assertEqual(0, runCmd("wic create %s -e core-image-minimal -o %s" \
+                                       % (wks_file, self.resultdir)).status)
+
+            os.remove(wks_file)
+            wicout = glob(self.resultdir + "%s-*direct" % 'temp')
+            self.assertEqual(1, len(wicout))
+
+            wicimg = wicout[0]
+
+            # verify partition size with wic
+            res = runCmd("parted -m %s unit b p 2>/dev/null" % wicimg)
+            self.assertEqual(0, res.status)
+
+            # parse parted output which looks like this:
+            # BYT;\n
+            # /var/tmp/wic/build/tmpfwvjjkf_-201611101222-hda.direct:200MiB:file:512:512:msdos::;\n
+            # 1:0.00MiB:200MiB:200MiB:ext4::;\n
+            partlns = res.output.splitlines()[2:]
+
+            self.assertEqual(3, len(partlns))
+
+            for part in [1, 2, 3]:
+                part_file = os.path.join(self.resultdir, "selftest_img.part%d" % part)
+                partln = partlns[part-1].split(":")
+                self.assertEqual(7, len(partln))
+                start = int(partln[1].rstrip("B")) / 512
+                length = int(partln[3].rstrip("B")) / 512
+                self.assertEqual(0, runCmd("dd if=%s of=%s skip=%d count=%d" %
+                                           (wicimg, part_file, start, length)).status)
+
+            # Test partition 1, should contain the normal root directories, except
+            # /usr.
+            res = runCmd("debugfs -R 'ls -p' %s 2>/dev/null" % os.path.join(self.resultdir, "selftest_img.part1"))
+            self.assertEqual(0, res.status)
+            files = [line.split('/')[5] for line in res.output.split('\n')]
+            self.assertIn("etc", files)
+            self.assertNotIn("usr", files)
+
+            # Partition 2, should contain common directories for /usr, not root
+            # directories.
+            res = runCmd("debugfs -R 'ls -p' %s 2>/dev/null" % os.path.join(self.resultdir, "selftest_img.part2"))
+            self.assertEqual(0, res.status)
+            files = [line.split('/')[5] for line in res.output.split('\n')]
+            self.assertNotIn("etc", files)
+            self.assertNotIn("usr", files)
+            self.assertIn("share", files)
+
+            # Partition 3, should contain the same as partition 2, including the bin
+            # directory, but not the files inside it.
+            res = runCmd("debugfs -R 'ls -p' %s 2>/dev/null" % os.path.join(self.resultdir, "selftest_img.part3"))
+            self.assertEqual(0, res.status)
+            files = [line.split('/')[5] for line in res.output.split('\n')]
+            self.assertNotIn("etc", files)
+            self.assertNotIn("usr", files)
+            self.assertIn("share", files)
+            self.assertIn("bin", files)
+            res = runCmd("debugfs -R 'ls -p bin' %s 2>/dev/null" % os.path.join(self.resultdir, "selftest_img.part3"))
+            self.assertEqual(0, res.status)
+            files = [line.split('/')[5] for line in res.output.split('\n')]
+            self.assertIn(".", files)
+            self.assertIn("..", files)
+            self.assertEqual(2, len(files))
+
+            for part in [1, 2, 3]:
+                part_file = os.path.join(self.resultdir, "selftest_img.part%d" % part)
+                os.remove(part_file)
+
+        finally:
+            os.environ['PATH'] = oldpath
+
+    def test_exclude_path_errors(self):
+        """Test --exclude-path wks option error handling."""
+        wks_file = 'temp.wks'
+
+        rootfs_dir = get_bb_var('IMAGE_ROOTFS', 'core-image-minimal')
+
+        # Absolute argument.
+        with open(wks_file, 'w') as wks:
+            wks.write("part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path /usr")
+        self.assertNotEqual(0, runCmd("wic create %s -e core-image-minimal -o %s" \
+                                      % (wks_file, self.resultdir), ignore_status=True).status)
+        os.remove(wks_file)
+
+        # Argument pointing to parent directory.
+        with open(wks_file, 'w') as wks:
+            wks.write("part / --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path ././..")
+        self.assertNotEqual(0, runCmd("wic create %s -e core-image-minimal -o %s" \
+                                      % (wks_file, self.resultdir), ignore_status=True).status)
+        os.remove(wks_file)
+
     @testcase(1496)
     def test_bmap_short(self):
         """Test generation of .bmap file -m option"""