tools/ps-sheet -> tools/sheet, take js sheet spec as arg

Tupfile.lua

@@ -26,9 +26,9 @@ rule{
 
 rule{
     display="ps trainers sheet",
-    input={},
+    input={"ps-trainers.sheet.mjs"},
     command={
-        "node tools/ps-sheet trainers src/canonical/trainers %o",
+        "node tools/sheet %f %o",
         compresspng{config="SPRITESHEET"}
     },
     output={"build/ps/trainers-sheet.png"}

ps-trainers.sheet.mjs

@@ -1,6 +1,11 @@
 
+import fs from 'fs';
+import path from 'path';
+import {fileURLToPath} from 'url';
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 // Derived from pokemon-showdown-client/src/battle-dex-data.ts
-export default {
+const BattleAvatarNumbers = {
 	1: 'lucas',
 	2: 'dawn',
 	3: 'youngster-gen4',
@@ -297,3 +302,17 @@ export default {
     // Not in the existing trainer sheet...
 	// 294: 'ash',
 }
+
+
+const entries = [];
+
+for (const [num, id] of Object.entries(BattleAvatarNumbers)) {
+    entries[num - 1] = path.join(__dirname, "src/canonical/trainers", id + ".png");
+}
+
+export default {
+    width: 80,
+    height: 80,
+    tile: 16,
+    entries
+};

tools/ps-sheet/index.js

@@ -1,29 +0,0 @@
-
-import cp from 'child_process';
-import path from 'path';
-import BattleAvatarNumbers from './data-trainers.js';
-
-const type = process.argv[2];
-const dir = process.argv[3];
-const dest = process.argv[4];
-
-if (!dir || !dest) {
-    throw new Error(`node tools/ps-sheet <type> <dir> <dest>`);
-}
-
-if (type === 'trainers') {
-    // Guaranteed to be in the right order by V8, but iirc not by other JS engines.
-    const trainers = Object.values(BattleAvatarNumbers).map(t => path.join(dir, t) + ".png");
-
-    cp.execFileSync("montage", [
-        ...trainers,
-        "-background", "transparent",
-        "-geometry", "80x80>",
-        "-gravity", "center",
-        "-tile", "16x",
-        "-depth", "8",
-        dest
-    ]);
-} else {
-    throw new Error(`unknown type: ${type}`);
-}

tools/sheet/index.js

@@ -0,0 +1,25 @@
+
+import cp from 'child_process';
+import path from 'path';
+
+const sheetjs = process.argv[2];
+const dest = process.argv[3];
+
+if (!sheetjs || !dest) {
+    throw new Error(`node tools/ps-sheet <file.sheet.js> <dest>`);
+}
+
+// Top-level await?
+(async() => {
+    const {default: sheet} = await import(path.join(process.cwd(), sheetjs));
+
+    cp.execFileSync("montage", [
+        ...sheet.entries,
+        "-background", "transparent",
+        "-geometry", `${sheet.width}x${sheet.height}>`,
+        "-gravity", "center",
+        "-tile", `${sheet.tile}x`,
+        "-depth", "8",
+        dest
+    ]);
+})();