Append missing translations to the template file

2 files changed, 40 insertions, 7 deletions

diff --git a/android/translations-converter/src/gettext.rs b/android/translations-converter/src/gettext.rs
index b4b241502d..edd5fbd538 100644
--- a/android/translations-converter/src/gettext.rs
+++ b/android/translations-converter/src/gettext.rs
@@ -1,8 +1,8 @@
 use lazy_static::lazy_static;
 use regex::Regex;
 use std::{
-    fs::File,
-    io::{BufRead, BufReader},
+    fs::{File, OpenOptions},
+    io::{self, BufRead, BufReader, BufWriter, Write},
     path::Path,
 };
 
@@ -49,6 +49,28 @@ pub fn load_file(file_path: impl AsRef<Path>) -> Vec<MsgEntry> {
     entries
 }
 
+/// Append message entries to a translation file.
+///
+/// This is used to append missing translation entries back to the base translation template file.
+pub fn append_to_template(
+    file_path: impl AsRef<Path>,
+    entries: impl Iterator<Item = MsgEntry>,
+) -> Result<(), io::Error> {
+    let file = OpenOptions::new()
+        .write(true)
+        .append(true)
+        .open(file_path)?;
+    let mut writer = BufWriter::new(file);
+
+    for entry in entries {
+        writeln!(writer)?;
+        writeln!(writer, "msgid {:?}", entry.id)?;
+        writeln!(writer, "msgstr {:?}", entry.value)?;
+    }
+
+    Ok(())
+}
+
 fn parse_line<'l>(line: &'l str, prefix: &str, suffix: &str) -> Option<&'l str> {
     if line.starts_with(prefix) && line.ends_with(suffix) {
         let start = prefix.len();
diff --git a/android/translations-converter/src/main.rs b/android/translations-converter/src/main.rs
index 51afed1b67..56ca35a910 100644
--- a/android/translations-converter/src/main.rs
+++ b/android/translations-converter/src/main.rs
@@ -49,7 +49,8 @@ fn main() {
 
     let mut missing_translations = known_strings.clone();
 
-    let locale_files = fs::read_dir("../../gui/locales")
+    let locale_dir = Path::new("../../gui/locales");
+    let locale_files = fs::read_dir(&locale_dir)
         .expect("Failed to open root locale directory")
         .filter_map(|dir_entry_result| dir_entry_result.ok().map(|dir_entry| dir_entry.path()))
         .filter(|dir_entry_path| dir_entry_path.is_dir())
@@ -80,11 +81,21 @@ fn main() {
         );
     }
 
-    println!("Missing translations:");
-
-    for (missing_translation, id) in missing_translations {
-        println!("  {}: {}", id, missing_translation);
+    if !missing_translations.is_empty() {
+        println!("Appending missing translations to template file:");
     }
+
+    gettext::append_to_template(
+        locale_dir.join("messages.pot"),
+        missing_translations
+            .into_iter()
+            .inspect(|(missing_translation, id)| println!("  {}: {}", id, missing_translation))
+            .map(|(id, _)| gettext::MsgEntry {
+                id,
+                value: String::new(),
+            }),
+    )
+    .expect("Failed to append missing translations to message template file");
 }
 
 /// Determines the localized value resources directory name based on a locale specification.