go-runner implementation

README.md

@@ -31,7 +31,7 @@ To do so, it starts an HTTP server that handles the request's lifecycle like API
 
 **Features:**
 
-- [Node.js](https://nodejs.org), [Python](https://www.python.org), [Ruby](https://www.ruby-lang.org) <!-- and [Go](https://golang.org) --> λ runtimes.
+- [Node.js](https://nodejs.org), [Python](https://www.python.org), [Ruby](https://www.ruby-lang.org) and [Go](https://golang.org) λ runtimes.
 - Velocity templates support.
 - Lazy loading of your handler files.
 - And more: integrations, authorizers, proxies, timeouts, responseParameters, HTTPS, CORS, etc...

src/lambda/handler-runner/HandlerRunner.js

@@ -5,6 +5,7 @@ import {
   supportedPython,
   supportedRuby,
   supportedJava,
+  supportedGo,
 } from '../../config/index.js'
 import { satisfiesVersionRange } from '../../utils/index.js'
 
@@ -116,6 +117,11 @@ export default class HandlerRunner {
       )
     }
 
+    if (supportedGo.has(runtime)) {
+      const { default: GoRunner } = await import('./go-runner/index.js')
+      return new GoRunner(this.#funOptions, this.#env, this.v3Utils)
+    }
+
     if (supportedPython.has(runtime)) {
       const { default: PythonRunner } = await import('./python-runner/index.js')
       return new PythonRunner(

src/lambda/handler-runner/go-runner/GoRunner.js

@@ -0,0 +1,153 @@
+import { EOL } from 'os'
+import { promises as fsPromises } from 'fs'
+import { sep, resolve, parse as pathParse } from 'path'
+import execa, { sync } from 'execa'
+
+const { writeFile, readFile, mkdir, rmdir } = fsPromises
+const { parse, stringify } = JSON
+const { cwd } = process
+
+const PAYLOAD_IDENTIFIER = 'offline_payload'
+
+export default class GoRunner {
+  #env = null
+  #handlerPath = null
+  #tmpPath = null
+  #tmpFile = null
+  #goEnv = null
+
+  constructor(funOptions, env, v3Utils) {
+    const { handlerPath } = funOptions
+
+    this.#env = env
+    this.#handlerPath = handlerPath
+
+    if (v3Utils) {
+      this.log = v3Utils.log
+      this.progress = v3Utils.progress
+      this.writeText = v3Utils.writeText
+      this.v3Utils = v3Utils
+    }
+
+    // Make sure we have the mock-lambda runner
+    sync('go', ['get', 'github.com/icarus-sullivan/mock-lambda@e065469'])
+  }
+
+  async cleanup() {
+    try {
+      await rmdir(this.#tmpPath, { recursive: true })
+    } catch (e) {
+      // @ignore
+    }
+
+    this.#tmpFile = null
+    this.#tmpPath = null
+  }
+
+  _parsePayload(value) {
+    const log = []
+    let payload
+
+    for (const item of value.split(EOL)) {
+      if (item.indexOf(PAYLOAD_IDENTIFIER) === -1) {
+        log.push(item)
+      } else if (item.indexOf(PAYLOAD_IDENTIFIER) !== -1) {
+        try {
+          const {
+            offline_payload: { success, error },
+          } = parse(item)
+          if (success) {
+            payload = success
+          } else if (error) {
+            payload = error
+          }
+        } catch (err) {
+          // @ignore
+        }
+      }
+    }
+
+    // Log to console in case engineers want to see the rest of the info
+    if (this.log) {
+      this.log(log.join(EOL))
+    } else {
+      console.log(log.join(EOL))
+    }
+
+    return payload
+  }
+
+  async run(event, context) {
+    const { dir } = pathParse(this.#handlerPath)
+    const handlerCodeRoot = dir.split(sep).slice(0, -1).join(sep)
+    const handlerCode = await readFile(`${this.#handlerPath}.go`, 'utf8')
+    this.#tmpPath = resolve(handlerCodeRoot, 'tmp')
+    this.#tmpFile = resolve(this.#tmpPath, 'main.go')
+
+    const out = handlerCode.replace(
+      '"github.com/aws/aws-lambda-go/lambda"',
+      'lambda "github.com/icarus-sullivan/mock-lambda"',
+    )
+
+    try {
+      await mkdir(this.#tmpPath, { recursive: true })
+    } catch (e) {
+      // @ignore
+    }
+
+    try {
+      await writeFile(this.#tmpFile, out, 'utf8')
+    } catch (e) {
+      // @ignore
+    }
+
+    // Get go env to run this locally
+    if (!this.#goEnv) {
+      const goEnvResponse = await execa('go', ['env'], {
+        stdio: 'pipe',
+        encoding: 'utf-8',
+      })
+
+      const goEnvString = goEnvResponse.stdout || goEnvResponse.stderr
+      this.#goEnv = goEnvString.split(EOL).reduce((a, b) => {
+        const [k, v] = b.split('="')
+        // eslint-disable-next-line no-param-reassign
+        a[k] = v ? v.slice(0, -1) : ''
+        return a
+      }, {})
+    }
+
+    // Remove our root, since we want to invoke go relatively
+    const cwdPath = `${this.#tmpFile}`.replace(`${cwd()}${sep}`, '')
+    const { stdout, stderr } = await execa(`go`, ['run', cwdPath], {
+      stdio: 'pipe',
+      env: {
+        ...this.#env,
+        ...this.#goEnv,
+        AWS_LAMBDA_LOG_GROUP_NAME: context.logGroupName,
+        AWS_LAMBDA_LOG_STREAM_NAME: context.logStreamName,
+        AWS_LAMBDA_FUNCTION_NAME: context.functionName,
+        AWS_LAMBDA_FUNCTION_MEMORY_SIZE: context.memoryLimitInMB,
+        AWS_LAMBDA_FUNCTION_VERSION: context.functionVersion,
+        LAMBDA_EVENT: stringify(event),
+        LAMBDA_TEST_EVENT: `${event}`,
+        LAMBDA_CONTEXT: stringify(context),
+        IS_LAMBDA_AUTHORIZER:
+          event.type === 'REQUEST' || event.type === 'TOKEN',
+        IS_LAMBDA_REQUEST_AUTHORIZER: event.type === 'REQUEST',
+        IS_LAMBDA_TOKEN_AUTHORIZER: event.type === 'TOKEN',
+        PATH: process.env.PATH,
+      },
+      encoding: 'utf-8',
+    })
+
+    // Clean up after we created the temporary file
+    await this.cleanup()
+
+    if (stderr) {
+      return stderr
+    }
+
+    return this._parsePayload(stdout)
+  }
+}

src/lambda/handler-runner/go-runner/index.js

@@ -0,0 +1 @@
+export { default } from './GoRunner.js'

src/utils/checkGoVersion.js

@@ -0,0 +1,15 @@
+import execa from 'execa'
+
+export default async function checkGoVersion() {
+  let goVersion
+  try {
+    const { stdout } = await execa('go', ['version'])
+    if (stdout.match(/go1.\d+/g)) {
+      goVersion = '1.x'
+    }
+  } catch (err) {
+    // @ignore
+  }
+
+  return goVersion
+}

src/utils/index.js

@@ -14,6 +14,7 @@ export { default as parseQueryStringParameters } from './parseQueryStringParamet
 export { default as satisfiesVersionRange } from './satisfiesVersionRange.js'
 export { default as splitHandlerPathAndName } from './splitHandlerPathAndName.js'
 export { default as checkDockerDaemon } from './checkDockerDaemon.js'
+export { default as checkGoVersion } from './checkGoVersion.js'
 export { default as generateHapiPath } from './generateHapiPath.js'
 // export { default as baseImage } from './baseImage.js'
 

tests/_setupTeardown/npmInstall.js

@@ -1,7 +1,11 @@
 import { resolve } from 'path'
 import execa from 'execa'
 import promiseMap from 'p-map'
-import { checkDockerDaemon, detectExecutable } from '../../src/utils/index.js'
+import {
+  checkDockerDaemon,
+  checkGoVersion,
+  detectExecutable,
+} from '../../src/utils/index.js'
 
 const executables = ['python2', 'python3', 'ruby', 'java']
 
@@ -52,6 +56,11 @@ export default async function npmInstall() {
     }
   }
 
+  const go = await checkGoVersion()
+  if (go && go === '1.x') {
+    process.env.GO1X_DETECTED = true
+  }
+
   if (python2) {
     process.env.PYTHON2_DETECTED = true
   }

tests/integration/go/go1.x/.gitignore

@@ -0,0 +1 @@
+bin

tests/integration/go/go1.x/go.mod

@@ -0,0 +1,9 @@
+module serverless-offline-go1.x-test
+
+go 1.13
+
+require (
+	github.com/aws/aws-lambda-go v1.28.0
+	github.com/icarus-sullivan/mock-lambda v0.0.0-20220115083805-e065469e964a // indirect
+	github.com/urfave/cli v1.22.1 // indirect
+)

tests/integration/go/go1.x/go.sum

@@ -0,0 +1,29 @@
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/aws/aws-lambda-go v1.13.2 h1:8lYuRVn6rESoUNZXdbCmtGB4bBk4vcVYojiHjE4mMrM=
+github.com/aws/aws-lambda-go v1.13.2/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
+github.com/aws/aws-lambda-go v1.28.0 h1:fZiik1PZqW2IyAN4rj+Y0UBaO1IDFlsNo9Zz/XnArK4=
+github.com/aws/aws-lambda-go v1.28.0/go.mod h1:jJmlefzPfGnckuHdXX7/80O3BvUUi12XOkbv4w9SGLU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/icarus-sullivan/mock-lambda v0.0.0-20220114085425-44091545252e h1:cPv6jHZPqHlu73UmtFEVPRNHGnSrd43OKwpQKVktLcs=
+github.com/icarus-sullivan/mock-lambda v0.0.0-20220114085425-44091545252e/go.mod h1:2iuLAENWZqxe/B6XUDWw/3ioQ9d1fwhgFTlwVeIBpzY=
+github.com/icarus-sullivan/mock-lambda v0.0.0-20220115083805-e065469e964a h1:gmFO6gLHZkdJlkZ41QiQ5tzH8LORPVJCuKk6YKyquU0=
+github.com/icarus-sullivan/mock-lambda v0.0.0-20220115083805-e065469e964a/go.mod h1:2iuLAENWZqxe/B6XUDWw/3ioQ9d1fwhgFTlwVeIBpzY=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+github.com/urfave/cli/v2 v2.2.0/go.mod h1:SE9GqnLQmjVa0iPEY0f1w3ygNIYcIJ0OKPMoW2caLfQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

tests/integration/go/go1.x/go1.x.test.js

@@ -0,0 +1,40 @@
+import { platform } from 'os'
+import { resolve } from 'path'
+import fetch from 'node-fetch'
+import { joinUrl, setup, teardown } from '../../_testHelpers/index.js'
+
+jest.setTimeout(180000)
+
+const _describe =
+  process.env.GO1X_DETECTED && platform() !== 'win32' ? describe : describe.skip
+
+_describe('Go 1.x with GoRunner', () => {
+  // init
+  beforeAll(() =>
+    setup({
+      servicePath: resolve(__dirname),
+    }),
+  )
+
+  // cleanup
+  afterAll(() => teardown())
+
+  //
+  ;[
+    {
+      description: 'should work with go1.x',
+      expected: {
+        message: 'Hello Go 1.x!',
+      },
+      path: '/dev/hello',
+    },
+  ].forEach(({ description, expected, path }) => {
+    test(description, async () => {
+      const url = joinUrl(TEST_BASE_URL, path)
+      const response = await fetch(url)
+      const json = await response.json()
+
+      expect(json).toEqual(expected)
+    })
+  })
+})

tests/integration/go/go1.x/hello/main.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"context"
+
+	"github.com/aws/aws-lambda-go/events"
+	"github.com/aws/aws-lambda-go/lambda"
+)
+
+func Handler(ctx context.Context, req events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
+	return events.APIGatewayProxyResponse{
+		Body:       "{\"message\": \"Hello Go 1.x!\"}",
+		StatusCode: 200,
+	}, nil
+}
+
+func main() {
+	lambda.Start(Handler)
+}

tests/integration/go/go1.x/serverless.yml

@@ -0,0 +1,20 @@
+service: docker-go-1.x-tests
+
+plugins:
+  - ../../../../
+
+provider:
+  memorySize: 128
+  name: aws
+  region: us-east-1 # default
+  runtime: go1.x
+  stage: dev
+  versionFunctions: false
+
+functions:
+  hello:
+    events:
+      - http:
+          method: get
+          path: hello
+    handler: hello/main.go