diffoscope/comparators/__init__.py

@@ -50,6 +50,7 @@ class ComparatorManager:
         ("javascript.JavaScriptFile",),
         ("json.JSONFile",),
         ("xml.XMLFile",),
+        ("xmlb.XMLBFile",),
         ("openssl.Pkcs7File",),
         ("openssl.MobileProvisionFile",),
         ("text.TextFile",),

diffoscope/comparators/xmlb.py

+#
+# diffoscope: in-depth comparison of files, archives, and directories
+#
+# Copyright © 2021 Chris Lamb <lamby@debian.org>
+#
+# diffoscope is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# diffoscope is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with diffoscope.  If not, see <https://www.gnu.org/licenses/>.
+
+from diffoscope.tools import tool_required
+from diffoscope.difference import Difference
+
+from .utils.file import File
+from .utils.command import Command
+
+XMLB_MAGIC = b"XMLb"
+
+
+class XbTool(Command):
+    @tool_required("xb-tool")
+    def cmdline(self):
+        return ["xb-tool", "dump", self.path]
+
+
+class XMLBFile(File):
+    DESCRIPTION = "XMLB files"
+    FILE_EXTENSION_SUFFIX = {".xb"}
+
+    @classmethod
+    def recognizes(cls, file):
+        if not super().recognizes(file):
+            return False
+
+        return file.file_header.startswith(XMLB_MAGIC)
+
+    def compare_details(self, other, source=None):
+        return [Difference.from_operation(XbTool, self.path, other.path)]

diffoscope/external_tools.py

@@ -238,6 +238,7 @@ EXTERNAL_TOOLS = {
     "zipnote": {"debian": "zip", "guix": "zip"},
     "procyon": {"debian": "procyon-decompiler"},
     "dumpxsb": {"debian": "xmlbeans"},
+    "xb-tool": {"debian": "libxmlb-dev"},
     "zstd": {"debian": "zstd", "guix": "zstd"},
 }
 

diffoscope/path.py

 #
 # diffoscope: in-depth comparison of files, archives, and directories
 #
-# Copyright © 2017, 2020 Chris Lamb <lamby@debian.org>
+# Copyright © 2017, 2020, 2021 Chris Lamb <lamby@debian.org>
 #
 # diffoscope is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,12 +17,23 @@
 # along with diffoscope.  If not, see <https://www.gnu.org/licenses/>.
 
 import os
+import sys
 
 
 def set_path():
+    to_add = ["/sbin", "/usr/sbin", "/usr/local/sbin"]
     pathlist = os.environ["PATH"].split(os.pathsep)
 
-    for x in ("/sbin", "/usr/sbin", "/usr/local/sbin"):
+    # Check the /usr/lib/<multiarch-triplet directory as well.
+    try:
+        arch_dir = os.path.join("/usr/lib", sys.implementation._multiarch)
+    except AttributeError:
+        pass
+    else:
+        if os.path.exists(arch_dir):
+            to_add.append(arch_dir)
+
+    for x in to_add:
         if x not in pathlist:
             pathlist.append(x)