Initial Commit

.editorconfig

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+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.js]
+indent_style = space
+indent_size = 2
+
+[{package.json}]
+indent_style = space
+indent_size = 2

index.js

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+const crypto = require('crypto');
+const execa = require('execa');
+const platform = require('os').platform();
+const fs = require('fs');
+const MD5SUMREGEX = /^(.{32})/;
+const MACMD5REGEX = /^MD5.+=\s*(.+)$/g;
+
+/**
+ * Calc file md5.
+ * @param {String} fileName
+ * @return {Promise} md5 value.
+ */
+function calcMd5(fileName) {
+  const readStream = fs.createReadStream(fileName);
+  let md5 = crypto.createHash('md5');
+  return new Promise((resolve, reject) => {
+    readStream.on('data', chunk => md5.update(chunk));
+    readStream.on('error', reject);
+    readStream.on('end', () => {
+      let hash = md5.digest('hex');
+      resolve(hash);
+    })
+  })
+}
+
+/**
+ *
+ * @param {String} command
+ * @param {String} fileName
+ * @param {RegExp} regex
+ * @return {Promise.<String>}
+ */
+function nativeMd5(command, fileName, regex) {
+  return execa(command, [fileName]).then(res => {
+    const matches = regex.exec(res.stdout);
+    if (matches.length === 2) {
+      return matches[1]
+    } else {
+      return calcMd5(fileName);
+    }
+  }).catch(err => {
+    console.error(err);
+    return calcMd5(fileName);
+  })
+}
+
+/**
+ *
+ * @param fileName
+ * @return {Promise}
+ */
+module.exports = (fileName) => {
+  switch (platform) {
+    case 'darwin':
+      return nativeMd5('md5', fileName, MACMD5REGEX);
+      break;
+    case 'linux':
+      return nativeMd5('md5sum', fileName, MD5SUMREGEX);
+      break;
+    default:
+      return calcMd5(fileName);
+  }
+}

package.json

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+{
+  "name": "native-md5",
+  "version": "0.0.1",
+  "description": "Calculate file md5 via md5sum on Linux and md5 on Mac.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/0neSe7en/node-native-md5.git"
+  },
+  "keywords": [
+    "md5",
+    "native",
+    "linux",
+    "mac",
+    "file"
+  ],
+  "author": "0neSe7en",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/0neSe7en/node-native-md5/issues"
+  },
+  "homepage": "https://github.com/0neSe7en/node-native-md5#readme",
+  "dependencies": {
+    "execa": "^0.8.0"
+  }
+}

test.js

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+const md5 = require('./index');
+md5('/Users/wsy/dev/node/node-native-md5/node_modules/execa/index.js').then(res => {
+  console.log(res);
+})

yarn.lock

@@ -0,0 +1,88 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+cross-spawn@^5.0.1:
+  version "5.1.0"
+  resolved "http://registry.npm.taobao.org/cross-spawn/download/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
+  dependencies:
+    lru-cache "^4.0.1"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
+execa@^0.8.0:
+  version "0.8.0"
+  resolved "http://registry.npm.taobao.org/execa/download/execa-0.8.0.tgz#d8d76bbc1b55217ed190fd6dd49d3c774ecfc8da"
+  dependencies:
+    cross-spawn "^5.0.1"
+    get-stream "^3.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
+get-stream@^3.0.0:
+  version "3.0.0"
+  resolved "http://registry.npm.taobao.org/get-stream/download/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
+
+is-stream@^1.1.0:
+  version "1.1.0"
+  resolved "http://registry.npm.taobao.org/is-stream/download/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
+
+isexe@^2.0.0:
+  version "2.0.0"
+  resolved "http://registry.npm.taobao.org/isexe/download/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
+
+lru-cache@^4.0.1:
+  version "4.1.1"
+  resolved "http://registry.npm.taobao.org/lru-cache/download/lru-cache-4.1.1.tgz#622e32e82488b49279114a4f9ecf45e7cd6bba55"
+  dependencies:
+    pseudomap "^1.0.2"
+    yallist "^2.1.2"
+
+npm-run-path@^2.0.0:
+  version "2.0.2"
+  resolved "http://registry.npm.taobao.org/npm-run-path/download/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"
+  dependencies:
+    path-key "^2.0.0"
+
+p-finally@^1.0.0:
+  version "1.0.0"
+  resolved "http://registry.npm.taobao.org/p-finally/download/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
+
+path-key@^2.0.0:
+  version "2.0.1"
+  resolved "http://registry.npm.taobao.org/path-key/download/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
+
+pseudomap@^1.0.2:
+  version "1.0.2"
+  resolved "http://registry.npm.taobao.org/pseudomap/download/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
+
+shebang-command@^1.2.0:
+  version "1.2.0"
+  resolved "http://registry.npm.taobao.org/shebang-command/download/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
+  dependencies:
+    shebang-regex "^1.0.0"
+
+shebang-regex@^1.0.0:
+  version "1.0.0"
+  resolved "http://registry.npm.taobao.org/shebang-regex/download/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
+
+signal-exit@^3.0.0:
+  version "3.0.2"
+  resolved "http://registry.npm.taobao.org/signal-exit/download/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
+
+strip-eof@^1.0.0:
+  version "1.0.0"
+  resolved "http://registry.npm.taobao.org/strip-eof/download/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
+
+which@^1.2.9:
+  version "1.3.0"
+  resolved "http://registry.npm.taobao.org/which/download/which-1.3.0.tgz#ff04bdfc010ee547d780bec38e1ac1c2777d253a"
+  dependencies:
+    isexe "^2.0.0"
+
+yallist@^2.1.2:
+  version "2.1.2"
+  resolved "http://registry.npm.taobao.org/yallist/download/yallist-2.1.2.tgz#1c11f9218f076089a47dd512f93c6699a6a81d52"