add bin

Author: sunnylqm

README.md

@@ -26,3 +26,12 @@ The diff format is the streaming compressed format; use `patchStream` to apply i
 
 Apply diff file to old file and write new file by streaming. In sync mode
 returns `outNewPath`. In async mode, callback signature is `(err, outNewPath)`.
+
+## CLI
+
+After install, you can run:
+
+```bash
+hdp diff <oldFile> <newFile> <outDiff>
+hdp patch <oldFile> <diffFile> <outNew>
+```

bin/hdiffpatch.js

@@ -0,0 +1,61 @@
+#!/usr/bin/env node
+'use strict';
+
+const hdiffpatch = require('..');
+
+function usage() {
+  console.log(
+    [
+      'Usage:',
+      '  hdp diff <oldFile> <newFile> <outDiff>',
+      '  hdp patch <oldFile> <diffFile> <outNew>',
+      '',
+      'Notes:',
+      '  - Uses streaming diff/patch for low memory usage.',
+      '  - Outputs are files specified by <outDiff>/<outNew>.',
+    ].join('\n')
+  );
+}
+
+function fail(msg) {
+  if (msg) console.error(`Error: ${msg}`);
+  usage();
+  process.exit(1);
+}
+
+const args = process.argv.slice(2);
+if (args.length === 0 || args[0] === '-h' || args[0] === '--help') {
+  usage();
+  process.exit(0);
+}
+
+const cmd = args[0];
+if (cmd === 'diff') {
+  if (args.length !== 4) fail('diff expects 3 arguments.');
+  const oldFile = args[1];
+  const newFile = args[2];
+  const outDiff = args[3];
+  try {
+    hdiffpatch.diffStream(oldFile, newFile, outDiff);
+    console.log(outDiff);
+  } catch (err) {
+    fail(err && err.message ? err.message : String(err));
+  }
+  process.exit(0);
+}
+
+if (cmd === 'patch') {
+  if (args.length !== 4) fail('patch expects 3 arguments.');
+  const oldFile = args[1];
+  const diffFile = args[2];
+  const outNew = args[3];
+  try {
+    hdiffpatch.patchStream(oldFile, diffFile, outNew);
+    console.log(outNew);
+  } catch (err) {
+    fail(err && err.message ? err.message : String(err));
+  }
+  process.exit(0);
+}
+
+fail(`unknown command: ${cmd}`);

package.json

@@ -1,8 +1,11 @@
 {
   "name": "node-hdiffpatch",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "hdiffpatch port to node.js",
   "main": "index.js",
+  "bin": {
+    "hdp": "bin/hdiffpatch.js"
+  },
   "scripts": {
     "test": "node test/test.js",
     "benchmark": "node --expose-gc test/benchmark.js",