all exports work

.eslintrc.js

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+module.exports = {
+  "ecmaFeatures": {
+    "modules": true,
+    "spread" : true,
+    "restParams" : true
+  },
+  // "plugins": [
+  // "unicorn"
+  //  ],
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2017,
+    "sourceType": "module"
+  },
+  "extends": "eslint:recommended",
+  "rules": {
+    "indent": [
+      "error",
+      2
+    ],
+    // "unicorn/no-array-instanceof": "error",
+    "no-console": 0,
+    "semi": ["error", "never"],
+    "linebreak-style": [
+      "error",
+      "unix"
+    ],
+    "quotes": [
+      "error",
+      "single"
+    ]
+  }
+}

.gitignore

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+/node_modules/
+/coverage/

.npmignore

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+tests/
+test/
+*.test.js
+testing/
+example/

example/index.js

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+import systemd from '../'
+
+const SERVICE = 'uci.service'
+const PATH = 'uci.path'
+const DEST = '/opt/light'
+const NAME = 'name-device-DE4Y'
+  ;
+(async () => {
+
+  let settings= await systemd.read('./example/'+SERVICE)
+    .catch(err => {throw err})
+
+  settings.Service.WorkingDirectory=`${DEST}/${NAME}`
+  console.log(systemd.stringify(settings))
+
+  systemd.write(`./example/${NAME}.service`,settings)
+
+  settings= await systemd.read('./example/'+PATH)
+    .catch(err => {throw err})
+
+  settings.Path.PathModified=`${DEST}/${NAME}`
+  console.log(systemd.stringify(settings))
+
+  systemd.write(`./example/${NAME}.path`,settings)
+
+
+
+})().catch((err) => {console.log('fatal error', err)})

example/name-device-DE4Y.path

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+[Unit]
+Description=Watcher for Restart of Code Changes
+
+[Path]
+PathModified=/opt/light/name-device-DE4Y
+
+[Install]
+WantedBy=default.target

example/name-device-DE4Y.service

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+[Unit]
+Description=I2C Bus
+After=network-online.target
+
+[Service]
+WorkingDirectory=/opt/light/name-device-DE4Y
+ExecStart=/usr/bin/node -r esm index.js
+Restart=on-failure
+
+[Install]
+WantedBy=default.target

example/uci.path

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+[Unit]
+Description=Watcher for Restart of Code Changes
+[Path]
+PathModified=/opt/light/busRelays-i2cbus-X1D3
+[Install]
+WantedBy=default.target

example/uci.service

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+[Unit]
+Description=I2C Bus
+After=network-online.target
+
+[Service]
+WorkingDirectory=/opt/light/busRelays-i2cbus-X1D3
+ExecStart=/usr/bin/node -r esm index.js
+Restart=on-failure
+
+[Install]
+WantedBy=default.target

index.js

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+import { promisify } from 'util'
+import { readFile as readF, writeFile as writeF } from 'fs'
+const readFile = promisify(readF)
+const writeFile = promisify(writeF)
+import { stringify as toToml } from '@iarna/toml'
+import parse from 'xdg-parse'
+
+async function read (file) {
+  return readFile(file).then( buf => {
+    try { return parse(buf.toString()) }
+    catch(error) { return error }
+  })}
+
+function stringify(obj) {
+  try { return toToml(obj).replace(/["]/gi,'').replace(/\ = /gi,'=') }
+  catch(error) { return error }
+}
+
+async function write(file,obj) {
+  return writeFile(file,stringify(obj))
+}
+
+export default { read, write, stringify, parse }
+export {read, write, stringify, parse }

package.json

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+{
+  "name": "@uci-utils/systemd",
+  "version": "0.1.1",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "example": "node -r esm ./example || true",
+    "dev": "./node_modules/.bin/nodemon -r esm ./example || true"
+  },
+  "settings": "https://www.freedesktop.org/software/systemd/man/systemd.service.html",
+  "docs": "https://www.digitalocean.com/community/tutorials/understanding-systemd-units-and-unit-files",
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@iarna/toml": "^2.2.3",
+    "xdg-parse": "0.0.2"
+  },
+  "devDependencies": {
+    "esm": "^3.2.6",
+    "nodemon": "^1.18.10"
+  }
+}