Automatically load .env files (#57)

* Automatically load `.env` files

* Improved detection

* Even better

bin/micro-dev.js

@@ -6,6 +6,7 @@ const path = require('path')
 
 // Packages
 const mri = require('mri')
+const dotEnv = require('dotenv')
 
 // Utilities
 const generateHelp = require('../lib/help')
@@ -17,7 +18,8 @@ const flags = mri(process.argv.slice(2), {
   default: {
     host: '::',
     port: 3000,
-    limit: '1mb'
+    limit: '1mb',
+    dotenv: '.env'
   },
   alias: {
     p: 'port',
@@ -29,7 +31,8 @@ const flags = mri(process.argv.slice(2), {
     h: 'help',
     v: 'version',
     i: 'ignore',
-    l: 'limit'
+    l: 'limit',
+    d: 'dotenv'
   },
   unknown(flag) {
     console.log(`The option "${flag}" is unknown. Use one of these:`)
@@ -52,6 +55,11 @@ if (flags.version) {
   process.exit()
 }
 
+// Load the `.env` file
+dotEnv.config({
+  path: path.resolve(process.cwd(), flags.dotenv)
+})
+
 if (flags.cold && (flags.watch || flags.poll)) {
   logError(
     'The --cold flag is not compatible with --watch or --poll!',

lib/help.js

@@ -8,6 +8,7 @@ module.exports = () => {
 
     ${g('-p, --port <n>')}      Port to listen on (defaults to 3000)
     ${g('-H, --host')}          The host on which micro will run
+    ${g('-d, --dotenv')}        Custom path for a .env file (relative to cwd)
     ${g('-c, --cold')}          Disable hot reloading
     ${g('-w, --watch <dir>')}   A directory to watch in addition to [path]
     ${g('-L, --poll')}          Poll for code changes rather than using events

package.json

@@ -44,6 +44,7 @@
     "chokidar": "1.7.0",
     "clipboardy": "1.2.2",
     "debounce": "1.1.0",
+    "dotenv": "4.0.0",
     "get-port": "3.2.0",
     "ip": "1.1.5",
     "jsome": "2.3.26",
@@ -57,7 +58,7 @@
     "eslint-config-prettier": "2.9.0",
     "husky": "0.14.3",
     "lint-staged": "6.0.0",
-    "prettier": "1.8.2",
+    "prettier": "1.9.1",
     "xo": "0.18.2"
   }
 }