feat: support different methods of configuring mos

Use rcfile to support configs via package.json, yaml, json and js files.

README.md

@@ -228,6 +228,7 @@ To disable a default plugin, pass `false` instead of a config object:
 - [mos-processor](https://github.com/mosjs/mos-processor): A markdown processor for mos
 - [normalize-newline](https://github.com/sindresorhus/normalize-newline): Normalize the newline characters in a string to `\n`
 - [normalize-path](https://github.com/jonschlinkert/normalize-path): Normalize file path slashes to be unix-like forward slashes. Also condenses repeat slashes to a single slash and removes and trailing slashes.
+- [rcfile](https://github.com/zkochan/rcfile): Loads library configuration in all possible ways
 - [relative](https://github.com/jonschlinkert/relative): Get the relative filepath from path A to path B. Calculates from file-to-directory, file-to-file, directory-to-file, and directory-to-directory.
 - [resolve](https://github.com/substack/node-resolve): resolve like require.resolve() on behalf of files asynchronously and synchronously
 - [tape](https://github.com/substack/tape): tap-producing test harness for node and browsers

package.json

@@ -16,7 +16,7 @@
   },
   "scripts": {
     "commit": "git-cz",
-    "md:test": "bin/mos.js test -x=\"src/test-cli/**\"",
+    "md:test": "bin/mos.js test -x=\"**/test-cli/**\"",
     "lint": "eslint src/ bin/",
     "test:code": "mocha --compilers js:babel-register",
     "pretest": "npm run transpile",
@@ -25,7 +25,7 @@
     "precoveralls": "istanbul cover -x \"**/*.spec.js\" node_modules/mocha/bin/_mocha --report lcovonly -- --compilers js:babel-register -R spec && npm i coveralls@2",
     "coveralls": "cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
     "postcoveralls": "rm -rf ./coverage",
-    "md": "bin/mos.js -x=\"src/test-cli/**\"",
+    "md": "bin/mos.js -x=\"**/test-cli/**\"",
     "prepublish": "npm run transpile",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post",
     "transpile": "babel src --out-dir dist"
@@ -82,6 +82,7 @@
     "mos-processor": "^1.2.0",
     "normalize-newline": "~2.0.0",
     "normalize-path": "~2.0.1",
+    "rcfile": "^1.0.2",
     "relative": "~3.0.2",
     "resolve": "~1.1.7",
     "tape": "~4.5.1",

src/cli.js

@@ -11,6 +11,7 @@ const path = require('path')
 const test = require('tape')
 const tapDiff = require('@zkochan/tap-diff')
 const readPkgUp = require('@zkochan/read-pkg-up')
+const rcfile = require('rcfile')
 const mos = require('mos-processor')
 const defaultPlugins = require('./default-plugins')
 const resolve = require('resolve')
@@ -58,13 +59,13 @@ if (cli.flags.init) {
 
   const processMD = md => readPkgUp({ cwd: md.filePath })
     .then(result => {
+      const pkg = result.pkg
+      const config = rcfile('mos', { cwd: path.dirname(md.filePath) })
       const allDeps = new Set(Object
-        .keys(result.pkg.dependencies || {})
-        .concat(Object.keys(result.pkg.devDependencies || {})))
+        .keys(pkg.dependencies || {})
+        .concat(Object.keys(pkg.devDependencies || {})))
 
-      result.pkg.mos = result.pkg.mos || {}
-
-      const pkgPlugins = (result.pkg.mos.plugins || [])
+      const pkgPlugins = (config.plugins || [])
         .map(plugin => plugin instanceof Array
           ? { name: plugin[0], options: plugin[1] || {} }
           : { name: plugin, options: {} }
@@ -85,7 +86,7 @@ if (cli.flags.init) {
 
       const defaultPluginsWithOpts = defaultPlugins.reduce((defPlugins, defPlugin) => {
         const defPluginName = defPlugin.attributes.pkg && defPlugin.attributes.pkg.name || defPlugin.attributes.name
-        const options = result.pkg.mos[defPluginName] || result.pkg.mos[defPluginName.replace(/^mos-plugin-/, '')]
+        const options = config[defPluginName] || config[defPluginName.replace(/^mos-plugin-/, '')]
         if (options === false) {
           return defPlugins
         }