serverless-offline

[alikian]

Is there any support for serverless-offline? it seems serverless-offline doesn't call this plug-in

[hugoduncan]

https://github.com/dherault/serverless-offline/issues/580

[dschep]

I recommend creating & activating a virtualenv, installing your dependencies, then using sls offline

[JamesKyburz]

When each function had separate dependencies I created a local plugin to make it work offline, the plugin modifies sys.path and makes sure even boto3 and friends are installed. For this to work npx sls requirements install needs to be run first.

#!/usr/bin/env node

'use strict'

const path = require('path')
const fs = require('fs')

class PythonOfflineFix {
  constructor(serverless, options) {
    this.hooks = {
      'before:offline:start:init': () => this.fixPaths(serverless)
    }
    if (options.stage === 'local') {
      serverless.service.custom.pythonRequirements.noDeploy = []
    }
  }

  async fixPaths(serverless) {
    for (const func of Object.values(serverless.service.functions)) {
      if (func.runtime.match(/python/)) {
        if (func.module) {
          func.handler = `${func.module}/${func.handler}`
          delete func.module
        }
        if (!func.environment) {
          func.environment = {}
        }
        func.environment.PYTHONPATH = await fs.promises.realpath(
          path.join('.serverless', path.dirname(func.handler), 'requirements')
        )
      }
    }
  }
}

module.exports = PythonOfflineFix

[rodrigonehring]

@JamesKyburz I was almost forking the serverless-offline to modify that module path. Thank you!