From 225adff76c343045c21989eefd736abfcc2b26a0 Mon Sep 17 00:00:00 2001
From: "Brian C. Lane" <bcl@redhat.com>
Date: Thu, 28 Oct 2021 16:08:37 -0700
Subject: [PATCH] mount: Switch to using pycdio instead of pycdlib

Also add a root only test for IsoMountpoint.

(cherry picked from commit c4aba2e47f610e5e50ee16270aec2794e983aaca)
---
 lorax.spec                  |  2 +-
 src/pylorax/mount.py        | 18 +++++++++++-------
 test-packages               |  2 +-
 tests/pylorax/test_mount.py | 38 +++++++++++++++++++++++++++++++++++++
 4 files changed, 51 insertions(+), 9 deletions(-)
 create mode 100644 tests/pylorax/test_mount.py

diff --git a/lorax.spec b/lorax.spec
index 0d806007..18630a15 100644
--- a/lorax.spec
+++ b/lorax.spec
@@ -51,7 +51,7 @@ Requires:       python3-mako
 Requires:       python3-kickstart >= 3.19
 Requires:       python3-dnf >= 3.2.0
 Requires:       python3-librepo
-Requires:       python3-pycdlib
+Requires:       python3-pycdio
 
 %if 0%{?fedora}
 # Fedora specific deps
diff --git a/src/pylorax/mount.py b/src/pylorax/mount.py
index e51cafb9..a489bc76 100644
--- a/src/pylorax/mount.py
+++ b/src/pylorax/mount.py
@@ -21,8 +21,7 @@ import logging
 log = logging.getLogger("livemedia-creator")
 
 import os
-import pycdlib
-from pycdlib.pycdlibexception import PyCdlibException
+import iso9660
 
 from pylorax.imgutils import mount, umount
 
@@ -92,13 +91,18 @@ class IsoMountpoint(object):
 
     def get_iso_label(self):
         """
-        Get the iso's label using pycdlib
+        Get the iso's label using pycdio
 
         Sets self.label if one is found
         """
         try:
-            iso = pycdlib.PyCdlib()
-            iso.open(self.iso_path)
-            self.label = iso.pvd.volume_identifier.decode("UTF-8").strip()
-        except PyCdlibException as e:
+            iso = iso9660.ISO9660.IFS(source=self.iso_path)
+            if not iso.is_open():
+                raise RuntimeError("error opening file")
+
+            self.label = iso.get_volume_id()
+            if self.label is None:
+                self.label = ""
+                raise RuntimeError("error reading volume id")
+        except RuntimeError as e:
             log.error("Problem reading label from %s: %s", self.iso_path, e)
diff --git a/test-packages b/test-packages
index 70570dda..61c75226 100644
--- a/test-packages
+++ b/test-packages
@@ -13,7 +13,7 @@ python3-magic
 python3-mako
 python3-pocketlint
 python3-psutil
-python3-pycdlib
+python3-pycdio
 python3-pylint
 python3-pytest
 python3-pytest-cov
diff --git a/tests/pylorax/test_mount.py b/tests/pylorax/test_mount.py
new file mode 100644
index 00000000..08f3e99c
--- /dev/null
+++ b/tests/pylorax/test_mount.py
@@ -0,0 +1,38 @@
+import os
+import subprocess
+import tempfile
+import unittest
+
+from pylorax.mount import IsoMountpoint
+from pylorax.sysutils import joinpaths
+
+
+def mktestiso(rootdir, volid):
+    # Make some fake files
+    for f in ("/images/pxeboot/vmlinuz", "/images/pxeboot/initrd.img", "/LiveOS/squashfs.img"):
+        p = joinpaths(rootdir, "sysroot", f)
+        os.makedirs(os.path.dirname(p), exist_ok=True)
+        with open(p, "w") as ff:
+            ff.write("I AM FAKE FILE %s" % f.upper())
+
+    # Make an iso of the files
+    make_iso = ["xorrisofs", "-o", joinpaths(rootdir, "test.iso"),
+                "-R", "-J", "-V", volid,
+                "-graft-points", "/=%s" % joinpaths(rootdir, "sysroot")]
+    subprocess.check_call(make_iso)
+
+@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
+class IsoMountpointTest(unittest.TestCase):
+    def test_volid(self):
+        with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
+            mktestiso(work_dir, "Fedora-test-iso-x86_64")
+            self.assertTrue(os.path.exists(joinpaths(work_dir, "test.iso")))
+
+            iso = IsoMountpoint(joinpaths(work_dir, "test.iso"))
+            self.addCleanup(iso.umount)
+            self.assertEqual(iso.iso_path, joinpaths(work_dir, "test.iso"))
+            self.assertIsNotNone(iso.mount_dir)
+            self.assertTrue(iso.stage2)
+            self.assertTrue(iso.kernel.endswith("vmlinuz"))
+            self.assertTrue(iso.initrd.endswith("initrd.img"))
+            self.assertEqual(iso.label, "Fedora-test-iso-x86_64")