1 files changed, 77 insertions, 0 deletions
diff --git a/build_files/buildbot/codesign/absolute_and_relative_filename.py b/build_files/buildbot/codesign/absolute_and_relative_filename.py
new file mode 100644
index 00000000000..bea9ea7e8d0
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+++ b/build_files/buildbot/codesign/absolute_and_relative_filename.py
@@ -0,0 +1,77 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program 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 2
+#  of the License, or (at your option) any later version.
+#
+#  This program 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 this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+# <pep8 compliant>
+
+from dataclasses import dataclass
+from pathlib import Path
+from typing import List
+
+
+@dataclass
+class AbsoluteAndRelativeFileName:
+    """
+    Helper class which keeps track of absolute file path for a direct access and
+    corresponding relative path against given base.
+
+    The relative part is used to construct a file name within an archive which
+    contains files which are to be signed or which has been signed already
+    (depending on whether the archive is addressed to signing server or back
+    to the buildbot worker).
+    """
+
+    # Base directory which is where relative_filepath is relative to.
+    base_dir: Path
+
+    # Full absolute path of the corresponding file.
+    absolute_filepath: Path
+
+    # Derived from full file path, contains part of the path which is relative
+    # to a desired base path.
+    relative_filepath: Path
+
+    def __init__(self, base_dir: Path, filepath: Path):
+        self.base_dir = base_dir
+        self.absolute_filepath = filepath.resolve()
+        self.relative_filepath = self.absolute_filepath.relative_to(
+            self.base_dir)
+
+    @classmethod
+    def from_path(cls, path: Path) -> 'AbsoluteAndRelativeFileName':
+        assert path.is_absolute()
+        assert path.is_file()
+
+        base_dir = path.parent
+        return AbsoluteAndRelativeFileName(base_dir, path)
+
+    @classmethod
+    def recursively_from_directory(cls, base_dir: Path) \
+            -> List['AbsoluteAndRelativeFileName']:
+        """
+        Create list of AbsoluteAndRelativeFileName for all the files in the
+        given directory.
+        """
+        assert base_dir.is_absolute()
+        assert base_dir.is_dir()
+
+        result = []
+        for filename in base_dir.glob('**/*'):
+            if not filename.is_file():
+                continue
+            result.append(AbsoluteAndRelativeFileName(base_dir, filename))
+        return result