1 files changed, 38 insertions, 0 deletions
diff --git a/config/printprereleasesuffix.py b/config/printprereleasesuffix.py
new file mode 100644
index 0000000000..aad6e40634
--- /dev/null
+++ b/config/printprereleasesuffix.py
@@ -0,0 +1,38 @@
+# 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/.
+
+# Prints the pre-release version suffix based on the version string
+#
+# Examples:
+# 2.1a3    > " 2.1 Alpha 3"
+# 2.1a3pre > ""
+# 3.2b4    > " 3.2 Beta 4"
+# 3.2b4pre > ""
+from __future__ import absolute_import
+from __future__ import print_function
+
+import sys
+import re
+
+
+def get_prerelease_suffix(version):
+    """ Returns the prerelease suffix from the version string argument """
+
+    def mfunc(m):
+        return " {0} {1} {2}".format(
+            m.group("prefix"),
+            {"a": "Alpha", "b": "Beta"}[m.group("c")],
+            m.group("suffix"),
+        )
+
+    result, c = re.subn(
+        r"^(?P<prefix>(\d+\.)*\d+)(?P<c>[ab])(?P<suffix>\d+)$", mfunc, version
+    )
+    if c != 1:
+        return ""
+    return result
+
+
+if len(sys.argv) == 2:
+    print(get_prerelease_suffix(sys.argv[1]))