trailing newline .ftl check can happen at build time

Removes the need to build ripgrep for CI

.github/scripts/trailing-newlines.sh

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-set -eu -o pipefail ${SHELLFLAGS}
-
-# Checking version to force it fail the build if rg is not installed.
-# Because `set -e` does not work inside the subshell $()
-if ! rg --version > /dev/null 2>&1;
-then
-    echo "Error: ripgrep is not installed!";
-    exit 1;
-fi;
-
-files=$(rg -l '[^\n]\z' -g '!*.{png,svg,scss,json,sql}' || true)
-
-if [ "$files" != "" ]; then
-    echo "the following files are missing a newline on the last line:"
-    echo $files
-    exit 1
-fi

rslib/build/mergeftl.rs

@@ -88,6 +88,9 @@ fn get_ftl_data_from_provided_files(sources: String) -> FTLData {
             let path = Path::new("..").join(path);
             std::fs::read_to_string(path).unwrap()
         });
+        if !entry.ends_with("\n") {
+            panic!(".ftl file should end with a newline: {}", path);
+        }
         match (first_parent, second_parent) {
             // templates in the rslib translation repo are ignored, as their canonical
             // form is part of this source tree

rslib/src/i18n.rs

@@ -79,8 +79,7 @@ macro_rules! ftl_path {
     };
 }
 
-/// Get the template/English resource text for the given group.
-/// These are embedded in the binary.
+/// Get the template/English resource text.
 fn ftl_template_text() -> &'static str {
     ftl_path!("template.ftl")
 }