🎉 Add "--env-from-file" option to create command

app.js

@@ -23,6 +23,7 @@ usage:
 
 options:
   <name>                       Name of the Lambda function.
+  --env-from-file=<path>       Read and set environmental variables from the specified file.
   --deploy-to=<stage>          Deploy the API to the specified stage, and make it callable from the Internet.
   --help                       Show this help, then exit.
   --rest-api-id=<rest-api-id>  ID of the AWS API Gateway rest api to point to the Lambda function.
@@ -38,6 +39,7 @@ async function main () {
 
   const createList = new Listr([
     tasks.packageApp,
+    tasks.readEnvironmentFile,
     tasks.createLambdaRole,
     tasks.createLambdaFunction,
     tasks.loadSwaggerDefinition,

lib/amazon.js

@@ -30,7 +30,7 @@ function addPermission ({ lambdaArn, restApiId }) {
   return lambda.addPermission(params).promise()
 }
 
-exports.createFunction = function ({ zipFile, functionName, role }) {
+exports.createFunction = function ({ zipFile, functionName, role, environment }) {
   const params = {
     Code: { ZipFile: zipFile },
     FunctionName: functionName,
@@ -39,7 +39,8 @@ exports.createFunction = function ({ zipFile, functionName, role }) {
     Publish: true,
     Role: role,
     Runtime: defaultParams.Runtime,
-    Timeout: defaultParams.Timeout
+    Timeout: defaultParams.Timeout,
+    Environment: (environment ? { Variables: environment } : undefined)
   }
 
   return lambda.createFunction(params).promise().then(res => res.FunctionArn)

lib/tasks.js

@@ -1,3 +1,7 @@
+const fs = require('fs')
+const util = require('util')
+
+const dotenv = require('dotenv')
 const parseArn = require('aws-arn-parser')
 const prettyBytes = require('pretty-bytes')
 
@@ -6,6 +10,8 @@ const builder = require('./builder')
 const swagger = require('./swagger')
 const UserError = require('./user-error')
 
+const readFile = util.promisify(fs.readFile)
+
 exports.packageApp = {
   title: 'Packaging app for Lambda',
   task: async (ctx, task) => {
@@ -14,6 +20,14 @@ exports.packageApp = {
   }
 }
 
+exports.readEnvironmentFile = {
+  title: 'Read environment file',
+  enabled: (ctx) => Boolean(ctx.args['--env-from-file']),
+  task: async (ctx, task) => {
+    ctx.environment = dotenv.parse(await readFile(ctx.args['--env-from-file'], 'utf-8'))
+  }
+}
+
 exports.createLambdaRole = {
   title: 'Creating Lambda role',
   task: async (ctx, task) => {
@@ -30,7 +44,7 @@ exports.createLambdaRole = {
 exports.createLambdaFunction = {
   title: 'Creating Lambda function',
   task: async (ctx, task) => {
-    ctx.lambdaArn = await amazon.createFunction({ zipFile: ctx.zipFile, functionName: ctx.args['<name>'], role: ctx.roleArn })
+    ctx.lambdaArn = await amazon.createFunction({ zipFile: ctx.zipFile, functionName: ctx.args['<name>'], role: ctx.roleArn, environment: ctx.environment })
     task.title = `Created new Lambda function with ARN: ${ctx.lambdaArn}`
   }
 }

package.json

@@ -9,6 +9,7 @@
     "aws-has-region": "^1.0.0",
     "aws-sdk": "^2.97.0",
     "cp-file": "^4.2.0",
+    "dotenv": "^5.0.0",
     "execa": "^0.8.0",
     "is-ci": "^1.1.0",
     "listr": "^0.13.0",