First release

.babelrc

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+{
+  "stage": 0
+}

.editorconfig

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+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+
+[*.{md,markdown}]
+# Allow <br/> from Markdown
+trim_trailing_whitespace = false

.eslintignore

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+.gitignore

.eslintrc

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+---
+extends: eslint:recommended
+
+ecmaFeatures:
+  modules: true
+
+env:
+  es6: true
+  browser: true
+  node: true
+
+rules:
+  indent: [2, 2] # 2 spaces indentation
+  max-len: [2, 80, 4]
+  quotes: [2, "double"]
+  semi: [2, "never"]
+  no-multiple-empty-lines: [2, {"max": 1}]
+
+  brace-style: [2, "stroustrup"]
+  comma-dangle: [2, "always-multiline"]
+  comma-style: [2, "last"]
+  computed-property-spacing: [2, "never"]
+  dot-location: [2, "property"]
+
+  one-var: [2, "never"]
+  no-var: [2]
+  prefer-const: [2]
+  no-bitwise: [2]
+
+  object-curly-spacing: [2, "never"]
+  array-bracket-spacing: [2, "never"]
+  space-unary-ops: [2, {"words": true, "nonwords": false}]
+  space-after-keywords: [2, "always"]
+  space-before-blocks: [2, "always"]
+  space-before-function-paren: [2, "never"]
+  space-in-parens: [2, "never"]
+  spaced-comment: [2, "always"]

.gitignore

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+dist

.travis.yml

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+language: node_js

CHANGELOG.md

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+# 1.0.0 - 2015-08-04
+
+✨ First release

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2014 Maxime Thirouin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# rc-loader [![Build Status](https://travis-ci.org/MoOx/rc-loader.svg?branch=master)](https://travis-ci.org/MoOx/rc-loader)
+
+> Runtime configuration loader that supports YAML, JSON or JS.
+
+This module supercharges [rc](https://github.com/dominictarr/rc) to provide
+a smarter parser that can handle the following:
+
+- YAML
+- JSON
+- JS (`module.exports = {...}` or `exports = {...}`)
+
+## Installation
+
+```console
+$ npm install rc-loader
+```
+
+## Usage
+
+See original [rc](https://github.com/dominictarr/rc) documentation.
+
+---
+
+## [Changelog](CHANGELOG.md)
+
+## [License](LICENSE)

package.json

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+{
+  "name": "rc-loader",
+  "version": "1.0.0",
+  "description": "Runtime configuration loader that supports YAML, JSON or JS",
+  "keywords": [
+    "rc",
+    "rcloader",
+    "config"
+  ],
+  "author": "Maxime Thirouin",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/MoOx/rc-loader.git"
+  },
+  "homepage": "https://github.com/MoOx/rc-loader",
+  "bugs": {
+    "url": "https://github.com/MoOx/rc-loader/issues"
+  },
+  "main": "dist/index.js",
+  "files": [
+    "dist",
+    "!**/__tests__"
+  ],
+  "dependencies": {
+    "eval": "^0.1.0",
+    "js-yaml": "^3.3.1",
+    "rc": "^1.1.0",
+    "strip-json-comments": "^1.0.4"
+  },
+  "devDependencies": {
+    "babel": "^5.8.20",
+    "babel-tape-runner": "^1.1.0",
+    "eslint": "^1.0.0",
+    "rimraf": "^2.4.2",
+    "tape": "^4.0.2"
+  },
+  "scripts": {
+    "lint": "eslint .",
+    "tape": "babel-tape-runner 'src/**/__tests__/*.js'",
+    "test": "npm run lint && npm run tape",
+    "prepublish": "rimraf dist && babel src --out-dir dist"
+  }
+}

src/__tests__/fixture.js

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+const value = "js"
+
+module.exports = {
+  prop: value,
+}

src/__tests__/fixture.json

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+{
+  "prop": "json"
+}

src/__tests__/fixture.yml

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+prop: yml

src/__tests__/index.js

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+import path from "path"
+import tape from "tape"
+import rcLoader from ".."
+
+function loadRc(ext) {
+  const result = rcLoader("whatever", {}, {
+    config: path.join(__dirname, `fixture.${ext}`),
+  })
+  if (!typeof result === "object") {
+    throw new Error(`Cannot parse 'fixture.${ext}'`)
+  }
+
+  return result
+}
+
+tape("rc-loader", function(t) {
+  function test(ext) {
+    try {
+      t.equal(
+        loadRc(ext).prop,
+        ext,
+        `should parse ${ext}`
+      )
+    }
+    catch (e) {
+      t.fail(`cannot parse ${ext}`)
+      throw e
+    }
+  }
+
+  test("js")
+  test("json")
+  test("yml")
+
+  t.end()
+})

src/index.js

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+import rc from "rc"
+import rcParser from "./parser"
+
+export default function rcLoader(name, defaults, argv, parser) {
+  return rc(name, defaults, argv, parser || rcParser)
+}

src/parser.js

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+import evalModule from "eval"
+import yaml from "js-yaml"
+import stripJsonComments from "strip-json-comments"
+
+export default function parser(content, file) {
+  try {
+    return yaml.safeLoad(stripJsonComments(content))
+  }
+  catch(e) {
+    // `(module.)exports` = JS ?
+    if (/exports/.test(content)) {
+      return evalModule(content)
+    }
+
+    throw new Error(
+      "Cannot parse runtime configuration as YAML, JSON or JS" +
+      (file ? `from '${file}'` : "")
+    )
+  }
+}