Fall back to KC_BSLS if no mappings exist for KC_NUHS

and update the keymap lut

src/i18n/keymap_extras/convert_keymap_extras_header.js

@@ -307,6 +307,38 @@ function generateMissingKcBsls(kcInfo) {
   return bslsInfoLines;
 }
 
+function generateMissingKcNuhs(kcInfo) {
+  // If no explicit mapping for KC_NUHS exist, as is the case for many ANSI layouts, fall
+  // back to the KC_BSLS mapping.
+  if (kcInfo.has('KC_NUHS')) {
+    return '';
+  }
+  if (!kcInfo.has('KC_BSLS')) {
+    throw new Error(
+      'The input file is missing a mapping to both KC_BSLS and KC_NUHS. At least one of them must be mapped to an locale alias!'
+    );
+  }
+  const kcBslsInfo = kcInfo.get('KC_BSLS');
+  const kcPipeInfo = kcInfo.get('S(KC_BSLS)');
+  // Copy the KC_BSLS kc info object but replace the associated intl alias with KC_NUHS.
+  // Since it is pointless to repeat the US kc alias in the title, we only keep the clarification.
+  const kcNuhsInfo = {
+    ...kcBslsInfo,
+    intlAlias: 'KC_NUHS',
+    title: kcBslsInfo.clarification
+  };
+  const shiftedNuhsInfo = {
+    ...kcPipeInfo,
+    intlAlias: 'S(KC_NUHS)',
+    title: kcPipeInfo.clarification
+  };
+  kcInfo.set('KC_NUHS', kcNuhsInfo);
+  kcInfo.set('S(KC_NUHS)', shiftedNuhsInfo);
+  let nuhsInfoLines = stringify('KC_NUHS', kcNuhsInfo) + '\n';
+  nuhsInfoLines += stringify('S(KC_NUHS)', shiftedNuhsInfo);
+  return nuhsInfoLines;
+}
+
 function generateMissingShiftedAliasKcInfo(kcInfo) {
   let ret = '';
   for (const [shiftedKc, shiftedAlias] of shiftedKc2shiftedAlias.entries()) {
@@ -374,6 +406,7 @@ fs.readFile(process.argv.at(-1), 'utf8', function (err, data) {
     console.log(convertedLines.join('\n'));
     console.log('/* Other keys */');
     console.log(generateMissingKcBsls(kcInfo));
+    console.log(generateMissingKcNuhs(kcInfo));
     console.log(generateMissingShiftedAliasKcInfo(kcInfo));
     spaceCadetKeycodes = [
       'KC_LSPO',

src/i18n/keymap_extras/keymap_german.js

@@ -168,6 +168,7 @@ export default {
   KC_BSLS: { name: "'\n#", title: '' },
   'S(KC_BSLS)': { name: "'", title: '' },
   KC_PIPE: { name: "'", title: '' },
+
   KC_LCBR: { name: 'Ü', title: 'S(DE_UDIA) (capital Ü)' },
   KC_COLN: { name: 'Ö', title: 'S(DE_ODIA) (capital Ö)' },
   KC_DQUO: { name: 'Ä', title: 'S(DE_ADIA) (capital Ä)' },

src/i18n/keymap_extras/keymap_russian.js

@@ -143,6 +143,8 @@ export default {
 
   /* Other keys */
 
+  KC_NUHS: { name: '/\n\\', title: '' },
+  'S(KC_NUHS)': { name: '/', title: '' },
   KC_TILD: { name: 'Ё', title: 'S(RU_YO) (capital Ё)' },
   KC_LCBR: { name: 'Х', title: 'S(RU_HA) (capital Х)' },
   KC_RCBR: { name: 'Ъ', title: 'S(RU_HARD) (capital Ъ)' },