build_tools: add script to get supported Ubuntu versions

build_tools/supported_ubuntu_versions.py

@@ -0,0 +1,22 @@
+# /// script
+# requires-python = ">=3.5"
+# dependencies = [
+#     "launchpadlib",
+# ]
+# ///
+
+from launchpadlib.launchpad import Launchpad
+
+if __name__ == "__main__":
+    launchpad = Launchpad.login_anonymously(
+        "fish shell build script", "production", "~/.cache", version="devel"
+    )
+    ubu = launchpad.projects("ubuntu")
+    print(
+        "\n".join(
+            x["name"]
+            for x in ubu.series.entries
+            if x["supported"] == True
+            and x["name"] not in ("trusty", "xenial", "bionic", "focal")
+        )
+    )