fix CRLF problem on windows

scripts/apply-patches.mjs

@@ -1,23 +1,39 @@
 import {spawnSync} from 'node:child_process';
-import {readFileSync} from 'node:fs';
+import {mkdtempSync, readFileSync, rmSync, writeFileSync} from 'node:fs';
-import {dirname, resolve} from 'node:path';
+import {tmpdir} from 'node:os';
+import {dirname, join, resolve} from 'node:path';
 import {fileURLToPath} from 'node:url';
 
 const patchDir = resolve(dirname(fileURLToPath(import.meta.url)), '../patches');
 const source = resolve(process.argv[2] || 'fluxer-src');
-const names = readFileSync(resolve(patchDir, 'series'), 'utf8').split(/\r?\n/).filter(Boolean);
+const names = readFileSync(resolve(patchDir, 'series'), 'utf8')
+  .replace(/^\uFEFF/, '').split(/\r?\n/).filter(Boolean);
 if (!names.length) throw new Error('The patch series is empty');
-const patches = names.map((name) => {
+for (const name of names) {
   if (!/^[0-9]{4}-[a-z0-9-]+\.patch$/.test(name)) throw new Error(`Invalid patch name: ${name}`);
-  return resolve(patchDir, name);
+}
-});
+
-function apply(...options) {
+// Windows checkout or an editor may supply CRLF despite .gitattributes.
+// Normalize copies, retaining the original patch files and meaningful whitespace.
+const temporaryDir = mkdtempSync(join(tmpdir(), 'gscord-patches-'));
+try {
+  const patches = names.map((name) => {
+    const text = readFileSync(resolve(patchDir, name), 'utf8')
+      .replace(/^\uFEFF/, '').replace(/\r\n/g, '\n');
+    const target = join(temporaryDir, name);
+    writeFileSync(target, text, 'utf8');
+    return target;
+  });
+  function apply(...options) {
     const result = spawnSync('git', ['-C', source, 'apply', '--whitespace=error-all', ...options, ...patches], {
       stdio: 'inherit',
     });
     if (result.error) throw result.error;
     if (result.status !== 0) throw new Error(`git apply ${options.join(' ')} failed (${result.status})`);
+  }
+  apply('--check');
+  if (!process.argv.includes('--check')) apply();
+  console.log(`Validated ${patches.length} GSCORD patches${process.argv.includes('--check') ? '' : ' and applied them'}.`);
+} finally {
+  rmSync(temporaryDir, {recursive: true, force: true});
 }
-apply('--check');
-if (!process.argv.includes('--check')) apply();
-console.log(`Validated ${patches.length} GSCORD patches${process.argv.includes('--check') ? '' : ' and applied them'}.`);