update image watermark

.gitignore

@@ -1,3 +1,4 @@
+.idea/
 node_modules/
 # ---> macOS
 # General

image-watermark/deno.json

@@ -6,6 +6,7 @@
   },
   "nodeModulesDir": "auto",
   "imports": {
+    "@std/cli/parse-args": "jsr:@std/cli/parse-args",
     "@std/assert": "jsr:@std/assert@1",
     "sharp": "npm:sharp@^0.33.0"
   }

image-watermark/deno.lock

@@ -254,6 +254,7 @@
   "workspace": {
     "dependencies": [
       "jsr:@std/assert@1",
+      "jsr:@std/cli@*",
       "npm:sharp@0.33"
     ]
   }

image-watermark/main.ts

@@ -1,8 +1,8 @@
 #!/usr/bin/env -S deno run -A
 
 import sharp from "sharp";
-import { Buffer } from "node:buffer";
-import {parseArgs} from "jsr:@std/cli/parse-args";
+import {Buffer} from "node:buffer";
+import {parseArgs} from "@std/cli/parse-args";
 
 export interface WatermarkOptions {
   /** 水印文字 */
@@ -23,6 +23,13 @@ export interface WatermarkOptions {
   outputPath?: string;
 }
 
+function getDefaultOutputPath(inputPath: string): string {
+  const lastDot = inputPath.lastIndexOf(".");
+  return lastDot !== -1
+    ? `${inputPath.slice(0, lastDot)}_watermarked${inputPath.slice(lastDot)}`
+    : `${inputPath}_watermarked`;
+}
+
 /**
  * 在图片右下角添加文字水印
  * @param inputPath 输入图片路径
@@ -44,10 +51,7 @@ export async function addWatermark(
 
   let outputPath = options.outputPath;
   if (!outputPath) {
-    const lastDot = inputPath.lastIndexOf(".");
-    outputPath = lastDot !== -1
-      ? `${inputPath.slice(0, lastDot)}_watermarked${inputPath.slice(lastDot)}`
-      : `${inputPath}_watermarked`;
+    outputPath = getDefaultOutputPath(inputPath);
   }
 
   // 获取原图信息
@@ -68,30 +72,40 @@ export async function addWatermark(
   // text-anchor="end" 意味着文字的右边缘在指定的 x 坐标
   const textX = width - marginRight - 20;
   const textY = height - marginBottom;
-  
+
   // 背景矩形的左上角坐标
   // 背景右边缘与文字右边缘对齐
   const rectX = textX - bgWidth + 20;
   const rectY = textY - bgHeight + backgroundPadding + 2;
 
   // 创建最终 SVG 水印
-  const svg = `<svg width="${width}" height="${height}" xmlns="http://www.w3.org/2000/svg">
-    ${backgroundColor ? `<rect x="${rectX}" y="${rectY}" width="${bgWidth}" height="${bgHeight}" fill="${backgroundColor}" rx="4"/>` : ""}
-    <text x="${textX}" y="${textY}" font-family="sans-serif" font-size="${fontSize}" fill="${color}" text-anchor="end" dominant-baseline="alphabetic">${escapeXml(text)}</text>
+  const svg =
+    `<svg width="${width}" height="${height}" xmlns="http://www.w3.org/2000/svg">
+    ${
+      backgroundColor
+        ? `<rect x="${rectX}" y="${rectY}" width="${bgWidth}" height="${bgHeight}" fill="${backgroundColor}" rx="4"/>`
+        : ""
+    }
+    <text x="${textX}" y="${textY}" font-family="sans-serif" font-size="${fontSize}" fill="${color}" text-anchor="end" dominant-baseline="alphabetic">${
+      escapeXml(text)
+    }</text>
   </svg>`;
 
   // 将 SVG 水印叠加到原图
-  await sharp(inputPath)
-    .composite([
-      {
-        input: Buffer.from(svg),
-        top: 0,
-        left: 0,
-      },
-    ])
+  await sharp(inputPath).composite([
+    {
+      input: Buffer.from(svg),
+      top: 0,
+      left: 0,
+    },
+  ])
     .toFile(outputPath);
 
-  console.log(`Added watermark: ${outputPath}`);
+  if (inputPath == outputPath) {
+    console.log(`Added watermark: ${inputPath}`);
+  } else {
+    console.log(`Added watermark: ${inputPath} -> ${outputPath}`);
+  }
 }
 
 /**
@@ -108,8 +122,8 @@ function escapeXml(str: string): string {
 
 if (import.meta.main) {
   const flags = parseArgs(Deno.args, {
-      boolean: ["help"],
-      string: ["watermark"],
+    boolean: ["help", "unsafe-replace-file"],
+    string: ["watermark"],
   });
 
   const watermarkText = flags.watermark;
@@ -117,17 +131,26 @@ if (import.meta.main) {
 
   if (!watermarkText || imagePaths.length == 0) {
     console.log("Usage: deno run -A main.ts --watermark 'watermark' <FILES>");
-    console.log("Example: deno run -A main.ts --watermark '© 2026 MyName' image.jpg");
+    console.log(
+      "Example: deno run -A main.ts --watermark '© 2026 MyName' image.jpg",
+    );
     Deno.exit(1);
   }
 
   for (const imagePath of imagePaths) {
-    await addWatermark(imagePath+'', {
+    const imagePathStr = imagePath as string;
+
+    const options = {
       fontSize: 32,
       text: watermarkText,
-      color: 'black',
+      color: "black",
       backgroundPadding: 2,
-      backgroundColor: 'white' 
-    });
+      backgroundColor: "white",
+    } as WatermarkOptions;
+    if (flags["unsafe-replace-file"]) {
+      options.outputPath = imagePathStr;
+    }
+
+    await addWatermark(imagePathStr, options);
   }
 }