cli - use proper defaults

cli/main.ts

@@ -11,13 +11,19 @@ import { walkSync } from "https://deno.land/std@0.107.0/fs/mod.ts";
 
 const args = parse(Deno.args, {
   alias: {
-    "w": "width",
-    "h": "height",
-    "o": "output",
-    "m": "mode",
-    "r": "recursive",
+    w: "width",
+    h: "height",
+    o: "output",
+    m: "mode",
+    r: "recursive",
   },
   boolean: ["recursive"],
+  default: {
+    w: 640,
+    h: 640,
+    include: "*.png, *.jpg",
+    output: "collage.png"
+  }
 });
 
 if (args["mode"] === true) {
@@ -27,7 +33,7 @@ if (args["mode"] === true) {
 
 const files: Set<string> = new Set();
 const includeExtensions = Array.from(
-  String(args["include"] || "*.png, *.jpg").matchAll(/\*\.([\w]+)/g),
+  String(args["include"]).matchAll(/\*\.([\w]+)/g),
 ).map(([_, group]) => group);
 
 args["_"].forEach((arg) => {
@@ -68,7 +74,7 @@ if (args["mode"]) {
   allModeKeys.push(...displayCollageModeType);
 }
 
-const canvas = createCanvas(args["width"] || 640, args["height"] || 640);
+const canvas = createCanvas(args["width"], args["height"]);
 const context = canvas.getContext("2d");
 
 const collageConfig: CollageConfig = {
@@ -98,6 +104,6 @@ if (modeKey === "recursive") {
   mode.place(context, images, segments);
 }
 
-const output = args["output"] || "collage.png";
+const output = args["output"];
 console.log(`Saving to "${output}"...`);
 await Deno.writeFile(output, canvas.toBuffer());