1 files changed, 41 insertions, 0 deletions
diff --git a/testing/mozharness/mozharness/mozilla/checksums.py b/testing/mozharness/mozharness/mozilla/checksums.py
new file mode 100644
index 0000000000..e7071d506a
--- /dev/null
+++ b/testing/mozharness/mozharness/mozilla/checksums.py
@@ -0,0 +1,41 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import six
+
+
+def parse_checksums_file(checksums):
+    """
+    Parses checksums files that the build system generates and uploads:
+    https://hg.mozilla.org/mozilla-central/file/default/build/checksums.py
+    """
+    fileInfo = {}
+    for line in checksums.splitlines():
+        hash_, type_, size, file_ = line.split(None, 3)
+        type_ = six.ensure_str(type_)
+        file_ = six.ensure_str(file_)
+        size = int(size)
+        if size < 0:
+            raise ValueError("Found negative value (%d) for size." % size)
+        if file_ not in fileInfo:
+            fileInfo[file_] = {"hashes": {}}
+        # If the file already exists, make sure that the size matches the
+        # previous entry.
+        elif fileInfo[file_]["size"] != size:
+            raise ValueError(
+                "Found different sizes for same file %s (%s and %s)"
+                % (file_, fileInfo[file_]["size"], size)
+            )
+        # Same goes for the hash.
+        elif (
+            type_ in fileInfo[file_]["hashes"]
+            and fileInfo[file_]["hashes"][type_] != hash_
+        ):
+            raise ValueError(
+                "Found different %s hashes for same file %s (%s and %s)"
+                % (type_, file_, fileInfo[file_]["hashes"][type_], hash_)
+            )
+        fileInfo[file_]["size"] = size
+        fileInfo[file_]["hashes"][type_] = hash_
+    return fileInfo