diff --git a/.eslintrc.yml b/.eslintrc.yml
new file mode 100644
index 0000000..bbe1f10
--- /dev/null
+++ b/.eslintrc.yml
@@ -0,0 +1,305 @@
+# https://eslint.org/
+env: # https://eslint.org/docs/user-guide/configuring#specifying-environments
+  es6: true
+  node: true
+extends:
+  - eslint:recommended
+  - plugin:@typescript-eslint/eslint-recommended
+  - plugin:@typescript-eslint/recommended
+plugins:
+- import
+- "@typescript-eslint"
+parser: "@typescript-eslint/parser"
+parserOptions:
+  sourceType: module
+  project: ./tsconfig.json
+rules: # https://eslint.org/docs/rules/
+  accessor-pairs: error
+  array-bracket-newline: error
+  array-bracket-spacing:
+  - error
+  - never
+  array-callback-return: error
+  arrow-body-style: 'off'
+  arrow-parens:
+  - error
+  - always
+  arrow-spacing:
+  - error
+  - after: true
+    before: true
+  block-scoped-var: error
+  block-spacing: error
+  brace-style:
+  - error
+  - allman
+  callback-return: error
+  capitalized-comments: 'off'
+  class-methods-use-this: error
+  comma-dangle:
+  - error
+  - always-multiline
+  comma-spacing:
+  - error
+  - after: true
+    before: false
+  comma-style:
+  - error
+  - last
+  complexity:
+  - error
+  computed-property-spacing:
+  - error
+  - never
+  consistent-return: 'off'
+  consistent-this: error
+  curly: error
+  default-case: 'off'
+  dot-location:
+  - error
+  - property
+  dot-notation:
+  - error
+  - allowKeywords: true
+  eol-last: error
+  eqeqeq: error
+  for-direction: error
+  func-call-spacing: error
+  func-name-matching: error
+  func-names:
+  - error
+  - never
+  func-style:
+  - error
+  - declaration
+  function-paren-newline: error
+  generator-star-spacing: error
+  getter-return: error
+  global-require: error
+  guard-for-in: error
+  handle-callback-err: error
+  id-blacklist: error
+  id-length: 'off'
+  id-match: error
+  implicit-arrow-linebreak:
+  - error
+  - below
+  indent:
+  - error
+  - tab
+  indent-legacy: 'off'
+  init-declarations: error
+  jsx-quotes: error
+  key-spacing: error
+  keyword-spacing:
+  - error
+  - overrides:
+      if:
+        after: false
+      for:
+        after: false
+      while:
+        after: false
+      catch:
+        after: false
+      with:
+        after: false
+  line-comment-position: 'off'
+  linebreak-style:
+  - error
+  - unix
+  lines-around-comment: 'off'
+  lines-around-directive: error
+  lines-between-class-members:
+  - error
+  - always
+  max-depth: error
+  max-len: 'off'
+  max-lines: 'off'
+  max-nested-callbacks: error
+  max-params: 'off'
+  max-statements: 'off'
+  max-statements-per-line: error
+  multiline-comment-style:
+  - error
+  - separate-lines
+  multiline-ternary: error
+  new-cap: error
+  new-parens: error
+  newline-after-var: 'off'
+  newline-before-return: 'off'
+  no-alert: error
+  no-array-constructor: error
+  no-await-in-loop: error
+  no-bitwise: error
+  no-buffer-constructor: error
+  no-caller: error
+  no-catch-shadow: error
+  no-confusing-arrow: error
+  no-continue: 'off'
+  no-div-regex: error
+  no-duplicate-imports: error
+  no-else-return: 'off'
+  no-empty-function: 'off'
+  no-eq-null: error
+  no-eval: error
+  no-extend-native: error
+  no-extra-bind: error
+  no-extra-label: error
+  no-extra-parens: error
+  no-floating-decimal: error
+  no-implicit-coercion: error
+  no-implicit-globals: error
+  no-implied-eval: error
+  no-inline-comments: 'off'
+  no-invalid-this: error
+  no-iterator: error
+  no-label-var: error
+  no-labels: error
+  no-lonely-if: error
+  no-loop-func: error
+  no-magic-numbers: 'off'
+  no-mixed-operators: error
+  no-mixed-requires: error
+  no-multi-assign: error
+  no-multi-spaces: error
+  no-multi-str: error
+  no-multiple-empty-lines:
+  - error
+  - max: 1
+  no-native-reassign: error
+  no-negated-condition: error
+  no-negated-in-lhs: error
+  no-nested-ternary: error
+  no-new: error
+  no-new-func: error
+  no-new-object: error
+  no-new-require: error
+  no-new-wrappers: error
+  no-octal-escape: error
+  no-param-reassign: 'off'
+  no-path-concat: error
+  no-plusplus: 'off'
+  no-process-env: 'off'
+  no-process-exit: error
+  no-proto: error
+  no-prototype-builtins: 'off'
+  no-restricted-globals: error
+  no-restricted-imports: error
+  no-restricted-modules: error
+  no-restricted-properties: error
+  no-restricted-syntax: error
+  no-return-assign: error
+  no-return-await: error
+  no-script-url: error
+  no-self-compare: error
+  no-sequences: error
+  no-shadow: error
+  no-shadow-restricted-names: error
+  no-spaced-func: error
+  no-sync: 'off'
+  no-tabs: 'off'
+  no-template-curly-in-string: error
+  no-ternary: error
+  no-throw-literal: error
+  no-trailing-spaces: error
+  no-undef-init: error
+  no-undefined: 'off'
+  no-underscore-dangle: 'off'
+  no-unmodified-loop-condition: error
+  no-unneeded-ternary: error
+  no-unused-expressions: error
+  no-use-before-define: 'off'
+  no-useless-call: error
+  no-useless-computed-key: error
+  no-useless-concat: error
+  no-useless-constructor: error
+  no-useless-rename: error
+  no-useless-return: error
+  no-var: error
+  no-void: error
+  no-warning-comments: error
+  no-whitespace-before-property: error
+  no-with: error
+  nonblock-statement-body-position: error
+  object-curly-newline: 'off'
+  object-curly-spacing:
+  - error
+  - never
+  object-property-newline: error
+  object-shorthand: 'off'
+  one-var: 'off'
+  one-var-declaration-per-line: error
+  operator-assignment: error
+  operator-linebreak: error
+  padded-blocks: 'off'
+  padding-line-between-statements: error
+  prefer-arrow-callback: error
+  prefer-const: error
+  prefer-destructuring: error
+  prefer-numeric-literals: error
+  prefer-promise-reject-errors: error
+  prefer-reflect: error
+  prefer-rest-params: error
+  prefer-spread: error
+  prefer-template: error
+  quote-props: 'off'
+  quotes: 'off'
+  radix: error
+  require-await: error
+  require-jsdoc: error
+  rest-spread-spacing:
+  - error
+  - never
+  semi: error
+  semi-spacing: error
+  semi-style:
+  - error
+  - last
+  sort-imports: 'off'
+  sort-keys: 'off'
+  sort-vars: error
+  space-before-blocks: error
+  space-before-function-paren: 'off'
+  space-in-parens:
+  - error
+  - never
+  space-infix-ops: error
+  space-unary-ops: error
+  spaced-comment:
+  - error
+  - always
+  strict: error
+  switch-colon-spacing: error
+  symbol-description: error
+  template-curly-spacing:
+  - error
+  - never
+  template-tag-spacing: error
+  unicode-bom:
+  - error
+  - never
+  valid-jsdoc:
+  - error
+  - requireParamType: false
+    requireReturn: false
+    requireReturnType: false
+  vars-on-top: error
+  wrap-iife: error
+  wrap-regex: error
+  yield-star-spacing: error
+  yoda:
+  - error
+  - never
+
+  # import plugin
+  import/extensions: 'off'
+  import/no-unresolved:
+  - error
+
+  # @typescript-eslint plugin
+  "@typescript-eslint/explicit-function-return-type": 'off'
+  "@typescript-eslint/no-use-before-define":
+  - error
+  - functions: false
+  "@typescript-eslint/strict-boolean-expressions": error
diff --git a/.markdownlint.json b/.markdownlint.json
deleted file mode 100644
index 49a5aba..0000000
--- a/.markdownlint.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-  "MD007": {
-    "indent": 4
-  },
-  "MD013": {
-    "line_length": 255
-  },
-  "MD024": {
-    "siblings_only": true
-  }
-}
diff --git a/.markdownlint.yml b/.markdownlint.yml
new file mode 100644
index 0000000..144bda4
--- /dev/null
+++ b/.markdownlint.yml
@@ -0,0 +1,6 @@
+MD007:
+  indent: 4
+MD013:
+  line_length: 255
+MD024:
+  siblings_only: true
diff --git a/lib/main.js b/lib/main.js
deleted file mode 100644
index d67fcc0..0000000
--- a/lib/main.js
+++ /dev/null
@@ -1,89 +0,0 @@
-"use strict";
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-const fs = __importStar(require("fs"));
-const path = __importStar(require("path"));
-const core = __importStar(require("@actions/core"));
-/**
- * main function
- */
-function main() {
-    try {
-        const files = [
-            {
-                name: core.getInput("name"),
-                contents: core.getInput("private-key", {
-                    required: true,
-                }),
-                options: {
-                    mode: 0o400,
-                    flag: "ax",
-                },
-            },
-            {
-                name: "known_hosts",
-                contents: prependLf(core.getInput("known-hosts")),
-                options: {
-                    mode: 0o644,
-                    flag: "a",
-                },
-            },
-            {
-                name: "config",
-                contents: prependLf(core.getInput("config")),
-                options: {
-                    mode: 0o644,
-                    flag: "a",
-                },
-            },
-        ];
-        // create ".ssh" directory
-        const home = getHomeDirectory();
-        const dirName = path.resolve(home, ".ssh");
-        fs.mkdirSync(dirName, {
-            recursive: true,
-            mode: 0o700,
-        });
-        // create files
-        for (const file of files) {
-            const fileName = path.join(dirName, file.name);
-            fs.writeFileSync(fileName, file.contents, file.options);
-        }
-        console.log(`SSH key has been stored to ${dirName} successfully.`);
-    }
-    catch (err) {
-        core.setFailed(err.message);
-    }
-}
-/**
- * get home directory
- * @returns home directory
- */
-function getHomeDirectory() {
-    const homeEnv = process.platform == "win32" ? "USERPROFILE" : "HOME";
-    const home = process.env[homeEnv];
-    if (home === undefined) {
-        throw Error(`${homeEnv} is not defined`);
-    }
-    return home;
-}
-/**
- * prepend LF to value if not empty
- * @param value the value to prepend LF
- * @returns prepended value
- */
-function prependLf(value) {
-    if (value.length === 0) {
-        // do nothing if empty
-        return "";
-    }
-    return `\n${value}`;
-}
-main();
-//# sourceMappingURL=main.js.map
\ No newline at end of file
diff --git a/lib/main.js.map b/lib/main.js.map
deleted file mode 100644
index bb40230..0000000
--- a/lib/main.js.map
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 73e225b..2523849 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,10 +9,30 @@
       "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.0.tgz",
       "integrity": "sha512-ZKdyhlSlyz38S6YFfPnyNgCDZuAF2T0Qv5eHflNWytPS8Qjvz39bZFMry9Bb/dpSnqWcNeav5yM2CTYpJeY+Dw=="
     },
+    "@babel/code-frame": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+      "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.8.3"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
+      "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
+      "dev": true,
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      }
+    },
     "@npmcli/ci-detect": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@npmcli/ci-detect/-/ci-detect-1.0.0.tgz",
-      "integrity": "sha512-5Kp/ijewcOJonsiq+ydxDT6gxVPIvV0tNaxD9WAm2xya5EGhuyV8Ww+JswEXr5q677x5NVgU6eU/b2WlUiktrg==",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@npmcli/ci-detect/-/ci-detect-1.1.1.tgz",
+      "integrity": "sha512-h5eW3DljLypyhvfK94FkSSm4qtSUFddth/xW+7vnkVCEUJR38MYvctCSZkxqrzmXZSzpfImuAwwKvRqkEuDvCQ==",
       "dev": true
     },
     "@npmcli/installed-package-contents": {
@@ -48,12 +68,87 @@
       "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
       "dev": true
     },
+    "@types/eslint-visitor-keys": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@types/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz",
+      "integrity": "sha512-OCutwjDZ4aFS6PB1UZ988C4YgwlBHJd6wCeQqaLdmadZ/7e+w79+hbMUFC1QXDNCmdyoRfAFdm0RypzwR+Qpag==",
+      "dev": true
+    },
+    "@types/json-schema": {
+      "version": "7.0.4",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.4.tgz",
+      "integrity": "sha512-8+KAKzEvSUdeo+kmqnKrqgeE+LcA0tjYWFY7RPProVYwnqDjukzO+3b6dLD56rYX5TdWejnEOLJYOIeh4CXKuA==",
+      "dev": true
+    },
     "@types/node": {
       "version": "13.1.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-13.1.1.tgz",
       "integrity": "sha512-hx6zWtudh3Arsbl3cXay+JnkvVgCKzCWKv42C9J01N2T2np4h8w5X8u6Tpz5mj38kE3M9FM0Pazx8vKFFMnjLQ==",
       "dev": true
     },
+    "@typescript-eslint/eslint-plugin": {
+      "version": "2.16.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-2.16.0.tgz",
+      "integrity": "sha512-TKWbeFAKRPrvKiR9GNxErQ8sELKqg1ZvXi6uho07mcKShBnCnqNpDQWP01FEvWKf0bxM2g7uQEI5MNjSNqvUpQ==",
+      "dev": true,
+      "requires": {
+        "@typescript-eslint/experimental-utils": "2.16.0",
+        "eslint-utils": "^1.4.3",
+        "functional-red-black-tree": "^1.0.1",
+        "regexpp": "^3.0.0",
+        "tsutils": "^3.17.1"
+      }
+    },
+    "@typescript-eslint/experimental-utils": {
+      "version": "2.16.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-2.16.0.tgz",
+      "integrity": "sha512-bXTmAztXpqxliDKZgvWkl+5dHeRN+jqXVZ16peKKFzSXVzT6mz8kgBpHiVzEKO2NZ8OCU7dG61K9sRS/SkUUFQ==",
+      "dev": true,
+      "requires": {
+        "@types/json-schema": "^7.0.3",
+        "@typescript-eslint/typescript-estree": "2.16.0",
+        "eslint-scope": "^5.0.0"
+      }
+    },
+    "@typescript-eslint/parser": {
+      "version": "2.16.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-2.16.0.tgz",
+      "integrity": "sha512-+w8dMaYETM9v6il1yYYkApMSiwgnqXWJbXrA94LAWN603vXHACsZTirJduyeBOJjA9wT6xuXe5zZ1iCUzoxCfw==",
+      "dev": true,
+      "requires": {
+        "@types/eslint-visitor-keys": "^1.0.0",
+        "@typescript-eslint/experimental-utils": "2.16.0",
+        "@typescript-eslint/typescript-estree": "2.16.0",
+        "eslint-visitor-keys": "^1.1.0"
+      }
+    },
+    "@typescript-eslint/typescript-estree": {
+      "version": "2.16.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-2.16.0.tgz",
+      "integrity": "sha512-hyrCYjFHISos68Bk5KjUAXw0pP/455qq9nxqB1KkT67Pxjcfw+r6Yhcmqnp8etFL45UexCHUMrADHH7dI/m2WQ==",
+      "dev": true,
+      "requires": {
+        "debug": "^4.1.1",
+        "eslint-visitor-keys": "^1.1.0",
+        "glob": "^7.1.6",
+        "is-glob": "^4.0.1",
+        "lodash": "^4.17.15",
+        "semver": "^6.3.0",
+        "tsutils": "^3.17.1"
+      }
+    },
+    "acorn": {
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+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.0.tgz",
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+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
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+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        }
       }
     },
     "tar": {
@@ -2027,16 +3671,61 @@
         "execa": "^0.7.0"
       }
     },
+    "text-table": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
+      "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
+      "dev": true
+    },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
+      "dev": true
+    },
+    "tmp": {
+      "version": "0.0.33",
+      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
+      "integrity": "sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==",
+      "dev": true,
+      "requires": {
+        "os-tmpdir": "~1.0.2"
+      }
+    },
     "to-readable-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/to-readable-stream/-/to-readable-stream-1.0.0.tgz",
       "integrity": "sha512-Iq25XBt6zD5npPhlLVXGFN3/gyR2/qODcKNNyTMd4vbm39HUaOiAM4PMq0eMVC/Tkxz+Zjdsc55g9yyz+Yq00Q==",
       "dev": true
     },
+    "tslib": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
+      "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==",
+      "dev": true
+    },
+    "tsutils": {
+      "version": "3.17.1",
+      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-3.17.1.tgz",
+      "integrity": "sha512-kzeQ5B8H3w60nFY2g8cJIuH7JDpsALXySGtwGJ0p2LSjLgay3NdIpqq5SoOBe46bKDW2iq25irHCr8wjomUS2g==",
+      "dev": true,
+      "requires": {
+        "tslib": "^1.8.1"
+      }
+    },
+    "type-check": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
+      "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
+      "dev": true,
+      "requires": {
+        "prelude-ls": "~1.1.2"
+      }
+    },
     "type-fest": {
-      "version": "0.3.1",
-      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.3.1.tgz",
-      "integrity": "sha512-cUGJnCdr4STbePCgqNFbpVNCepa+kAVohJs1sLhxzdH+gnEoOd8VhbYa7pD3zZYGiURWM2xzEII3fQcRizDkYQ==",
+      "version": "0.8.1",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
+      "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
       "dev": true
     },
     "typescript": {
@@ -2045,6 +3734,12 @@
       "integrity": "sha512-A25xv5XCtarLwXpcDNZzCGvW2D1S3/bACratYBx2sax8PefsFhlYmkQicKHvpYflFS8if4zne5zT5kpJ7pzuvw==",
       "dev": true
     },
+    "uc.micro": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-1.0.6.tgz",
+      "integrity": "sha512-8Y75pvTYkLJW2hWQHXxoqRgV7qb9B+9vFEtidML+7koHUFapnVJAZ6cKs+Qjz5Aw3aZWHMC6u0wJE3At+nSGwA==",
+      "dev": true
+    },
     "unique-filename": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
@@ -2090,58 +3785,15 @@
         "latest-version": "^5.0.0",
         "semver-diff": "^2.0.0",
         "xdg-basedir": "^3.0.0"
-      },
-      "dependencies": {
-        "ansi-styles": {
-          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
-          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
-          "dev": true,
-          "requires": {
-            "color-convert": "^1.9.0"
-          }
-        },
-        "chalk": {
-          "version": "2.4.2",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
-          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "^3.2.1",
-            "escape-string-regexp": "^1.0.5",
-            "supports-color": "^5.3.0"
-          }
-        },
-        "color-convert": {
-          "version": "1.9.3",
-          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
-          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
-          "dev": true,
-          "requires": {
-            "color-name": "1.1.3"
-          }
-        },
-        "color-name": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
-          "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
-          "dev": true
-        },
-        "has-flag": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-          "dev": true
-        },
-        "supports-color": {
-          "version": "5.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+      }
+    },
+    "uri-js": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
       }
     },
     "url-parse-lax": {
@@ -2159,6 +3811,22 @@
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
       "dev": true
     },
+    "v8-compile-cache": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
+      "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
+      "dev": true
+    },
+    "validate-npm-package-license": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
+      "dev": true,
+      "requires": {
+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
+      }
+    },
     "validate-npm-package-name": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/validate-npm-package-name/-/validate-npm-package-name-3.0.0.tgz",
@@ -2169,9 +3837,9 @@
       }
     },
     "which": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
-      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
         "isexe": "^2.0.0"
@@ -2192,6 +3860,12 @@
           "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
           "dev": true
         },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
         "string-width": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
@@ -2213,12 +3887,80 @@
         }
       }
     },
+    "window-size": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.4.tgz",
+      "integrity": "sha1-+OGqHuWlPsW/FR/6CXQqatdpeHY=",
+      "dev": true
+    },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "dev": true
+    },
+    "wrap-ansi": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "dev": true,
+      "requires": {
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
+            "number-is-nan": "^1.0.0"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^2.0.0"
+          }
+        }
+      }
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "write": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
+      "dev": true,
+      "requires": {
+        "mkdirp": "^0.5.1"
+      }
+    },
     "write-file-atomic": {
       "version": "2.4.3",
       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
@@ -2236,11 +3978,89 @@
       "integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=",
       "dev": true
     },
+    "y18n": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
+      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
+      "dev": true
+    },
     "yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
       "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
       "dev": true
+    },
+    "yaml-lint": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/yaml-lint/-/yaml-lint-1.2.4.tgz",
+      "integrity": "sha512-qpKE0szyKsE9TrlVPi+bxKxVAjl30QjNAOyOxy7noQdf/WCCYUlT4xiCRxMG48eyeBzMBtBN6PgGfaB0MJePNw==",
+      "dev": true,
+      "requires": {
+        "glob": "^7.1.2",
+        "js-yaml": "^3.10.0",
+        "leprechaun": "0.0.2",
+        "lodash.merge": "^4.6.1",
+        "lodash.snakecase": "^4.1.1",
+        "nconf": "^0.10.0"
+      }
+    },
+    "yargs": {
+      "version": "3.32.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.32.0.tgz",
+      "integrity": "sha1-AwiOnr+edWtpdRYR0qXvWRSCyZU=",
+      "dev": true,
+      "requires": {
+        "camelcase": "^2.0.1",
+        "cliui": "^3.0.3",
+        "decamelize": "^1.1.1",
+        "os-locale": "^1.4.0",
+        "string-width": "^1.0.1",
+        "window-size": "^0.1.4",
+        "y18n": "^3.2.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+          "dev": true
+        },
+        "camelcase": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-2.1.1.tgz",
+          "integrity": "sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8=",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
+            "number-is-nan": "^1.0.0"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^2.0.0"
+          }
+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 699eeda..ed33ac7 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,12 @@
   },
   "scripts": {
     "build": "tsc",
-    "check-updates": "ncu"
+    "check-updates": "ncu",
+    "lint": "run-p lint:*",
+    "lint:ts": "eslint ./src --ext .ts",
+    "lint:md": "markdownlint . --ignore node_modules --ignore examples",
+    "lint:yaml": "yamllint .*.yml *.yml --ignore=node_modules/**/*.yml --ignore=node_modules/**/*.yaml",
+    "verify": "run-p lint"
   },
   "repository": {
     "type": "git",
@@ -30,7 +35,14 @@
   },
   "devDependencies": {
     "@types/node": "13.1.1",
+    "@typescript-eslint/eslint-plugin": "2.16.0",
+    "@typescript-eslint/parser": "2.16.0",
+    "eslint": "6.8.0",
+    "eslint-plugin-import": "2.20.0",
+    "markdownlint-cli": "0.21.0",
     "npm-check-updates": "4.0.1",
-    "typescript": "3.7.4"
+    "npm-run-all": "4.1.5",
+    "typescript": "3.7.4",
+    "yaml-lint": "1.2.4"
   }
 }
diff --git a/src/main.ts b/src/main.ts
index acbc766..48fbd44 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -75,7 +75,7 @@ function main(): void
  */
 function getHomeDirectory(): string
 {
-	const homeEnv = process.platform == "win32" ? "USERPROFILE" : "HOME";
+	const homeEnv = getHomeEnv();
 	const home = process.env[homeEnv];
 	if(home === undefined)
 	{
@@ -85,6 +85,22 @@ function getHomeDirectory(): string
 	return home;
 }
 
+/**
+ * get HOME environment name
+ * @returns HOME environment name
+ */
+function getHomeEnv(): string
+{
+	if(process.platform === "win32")
+	{
+		// Windows
+		return "USERPROFILE";
+	}
+
+	// macOS / Linux
+	return "HOME";
+}
+
 /**
  * prepend LF to value if not empty
  * @param value the value to prepend LF