oeqa/selftest/wic: add test for excluding symlinks

Add test to check if --exclude-path option can exclude symlinks. This
test validates commit[1].

Test result:
$ oe-selftest -r wic.Wic.test_exclude_path
2025-04-03 15:11:25,211 - oe-selftest - INFO - meta-selftest layer not found in BBLAYERS, adding it
2025-04-03 15:11:30,016 - oe-selftest - INFO - Adding layer libraries:
2025-04-03 15:11:30,017 - oe-selftest - INFO -  /buildarea/poky/meta/lib
2025-04-03 15:11:30,017 - oe-selftest - INFO - /buildarea/poky/meta-yocto-bsp/lib
2025-04-03 15:11:30,017 - oe-selftest - INFO - /buildarea/poky/meta-selftest/lib
2025-04-03 15:11:30,019 - oe-selftest - INFO - Checking base configuration is valid/parsable
NOTE: Starting bitbake server...
2025-04-03 15:11:31,652 - oe-selftest - INFO - Adding: "include selftest.inc" in /buildarea/poky/build-st/conf/local.conf
2025-04-03 15:11:31,653 - oe-selftest - INFO - Adding: "include bblayers.inc" in bblayers.conf
2025-04-03 15:11:31,653 - oe-selftest - INFO - test_exclude_path (wic.Wic)
2025-04-03 15:43:11,341 - oe-selftest - INFO -  ... ok
2025-04-03 15:43:11,341 - oe-selftest - INFO - ----------------------------------------------------------------------
2025-04-03 15:43:11,342 - oe-selftest - INFO - Ran 1 test in 1899.900s
2025-04-03 15:43:11,342 - oe-selftest - INFO - OK
2025-04-03 15:43:14,834 - oe-selftest - INFO - RESULTS:
2025-04-03 15:43:14,835 - oe-selftest - INFO - RESULTS - wic.Wic.test_exclude_path: PASSED (1899.69s)
2025-04-03 15:43:14,836 - oe-selftest - INFO - SUMMARY:
2025-04-03 15:43:14,836 - oe-selftest - INFO - oe-selftest () - Ran 1 test in 1899.900s
2025-04-03 15:43:14,836 - oe-selftest - INFO - oe-selftest - OK - All required tests passed (successes=1, skipped=0, failures=0, errors=0)

[1] https://git.openembedded.org/openembedded-core/commit/?id=42e829ac1e9d74646b6dfb327b18b15f6b0df60b

(From OE-Core rev: 0dd455bed9b52c0cf237ea2f8bd1a8f7890078e9)

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 23 insertions, 5 deletions

diff --git a/meta/lib/oeqa/selftest/cases/wic.py b/meta/lib/oeqa/selftest/cases/wic.py
index 4f5d43b5ee..59fd99a788 100644
--- a/meta/lib/oeqa/selftest/cases/wic.py
+++ b/meta/lib/oeqa/selftest/cases/wic.py
@@ -446,8 +446,9 @@ class Wic(WicTestCase):
                 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))
+part /etc --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/ --rootfs-dir %s/usr
+part /mnt --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/whoami --rootfs-dir %s/usr"""
+                          % (rootfs_dir, rootfs_dir, rootfs_dir))
             runCmd("wic create %s -e core-image-minimal -o %s" \
                                        % (wks_file, self.resultdir))
 
@@ -466,9 +467,9 @@ part /etc --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/ --r
             # 1:0.00MiB:200MiB:200MiB:ext4::;\n
             partlns = res.output.splitlines()[2:]
 
-            self.assertEqual(3, len(partlns))
+            self.assertEqual(4, len(partlns))
 
-            for part in [1, 2, 3]:
+            for part in [1, 2, 3, 4]:
                 part_file = os.path.join(self.resultdir, "selftest_img.part%d" % part)
                 partln = partlns[part-1].split(":")
                 self.assertEqual(7, len(partln))
@@ -510,7 +511,24 @@ part /etc --source rootfs --ondisk mmcblk0 --fstype=ext4 --exclude-path bin/ --r
             self.assertIn("..", files)
             self.assertEqual(2, len(files))
 
-            for part in [1, 2, 3]:
+            # Partition 4, should contain the same as partition 2, including the bin
+            # directory, but not whoami (a symlink to busybox.nosuid) inside it.
+            res = runCmd("debugfs -R 'ls -p' %s" % \
+                             os.path.join(self.resultdir, "selftest_img.part4"), stderr=subprocess.PIPE)
+            files = extract_files(res.output)
+            self.assertNotIn("etc", files)
+            self.assertNotIn("usr", files)
+            self.assertIn("share", files)
+            self.assertIn("bin", files)
+            res = runCmd("debugfs -R 'ls -p bin' %s" % \
+                             os.path.join(self.resultdir, "selftest_img.part4"), stderr=subprocess.PIPE)
+            files = extract_files(res.output)
+            self.assertIn(".", files)
+            self.assertIn("..", files)
+            self.assertIn("who", files)
+            self.assertNotIn("whoami", files)
+
+            for part in [1, 2, 3, 4]:
                 part_file = os.path.join(self.resultdir, "selftest_img.part%d" % part)
                 os.remove(part_file)