From aeb1aff636bd3e0e94d5c980892a827d321e5a6c Mon Sep 17 00:00:00 2001
From: Cel Andromeda Skeggs <cel.a.skeggs@jpl.nasa.gov>
Date: Mon, 18 Aug 2025 18:41:44 +0000
Subject: [PATCH] Add support for fpp file extension

This is for NASA's F Prime Prime modeling language.
---
 main.go                    |  1 +
 testdata/expected/file.fpp | 17 +++++++++++++++++
 testdata/initial/file.fpp  |  3 +++
 3 files changed, 21 insertions(+)
 create mode 100644 testdata/expected/file.fpp
 create mode 100644 testdata/initial/file.fpp

diff --git a/main.go b/main.go
index 9e42e8a..9bf601f 100644
--- a/main.go
+++ b/main.go
@@ -325,6 +325,7 @@ func licenseHeader(path string, tmpl *template.Template, data licenseData) ([]by
 		".bzl", ".bazel", "build", ".build",
 		".dockerfile", "dockerfile",
 		".ex", ".exs",
+		".fpp",
 		".graphql",
 		".jl",
 		".nix",
diff --git a/testdata/expected/file.fpp b/testdata/expected/file.fpp
new file mode 100644
index 0000000..60633d0
--- /dev/null
+++ b/testdata/expected/file.fpp
@@ -0,0 +1,17 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+module Example {
+    constant Message = "Hello World"
+}
diff --git a/testdata/initial/file.fpp b/testdata/initial/file.fpp
new file mode 100644
index 0000000..cdea27d
--- /dev/null
+++ b/testdata/initial/file.fpp
@@ -0,0 +1,3 @@
+module Example {
+    constant Message = "Hello World"
+}