sheet: pass list of sprites in a tmp file

tools/sheet/index.ts

@@ -2,6 +2,8 @@
 import 'make-promises-safe';
 import cp from 'child_process';
 import path from 'path';
+import fs from 'fs';
+import crypto from 'crypto';
 
 const sheetjs = process.argv[2];
 const dest = process.argv[3];
@@ -21,9 +23,14 @@ for (let i = 0; i < sheet.entries.length; i++) {
     }
 }
 
+// Store list of sprite files in a temp file, Windows can't handle large cli arg
+// lists. Just append a random string to the dest file
+const tmpFile = `${dest}.tmp.${crypto.randomBytes(6).readUIntLE(0,6).toString(36)}`;
+fs.writeFileSync(tmpFile, sheet.entries.join("\n"), 'utf8');
+
 cp.execFileSync("magick", [
     "montage",
-    ...sheet.entries,
+    `@${tmpFile}`,
     "-background", "transparent",
     "-geometry", `${sheet.width}x${sheet.height}>`,
     "-gravity", "center",
@@ -31,3 +38,5 @@ cp.execFileSync("magick", [
     "-depth", "8",
     dest
 ]);
+
+fs.unlinkSync(tmpFile);