compileFunctions.js

'use strict';

/* eslint no-use-before-define: 0 */

const path = require('path');

const _ = require('lodash');
const BbPromise = require('bluebird');
const { validateEventsProperty } = require('../../shared/validate');

module.exports = {
  compileFunction(functionName, projectName) {
    const funcObject = this.serverless.service.getFunction(functionName);

    this.serverless.cli.log(`Compiling function "${functionName}"...`);

    validateHandlerProperty(funcObject, functionName);
    validateEventsProperty(funcObject, functionName);
    validateVpcConnectorProperty(funcObject, functionName);

    const funcTemplate = getFunctionTemplate(
      funcObject,
      projectName,
      this.serverless.service.provider.region,
      `gs://${this.serverless.service.provider.deploymentBucketName}/${this.serverless.service.package.artifactDirectoryName}/${functionName}.zip`
    );

    funcTemplate.properties.serviceAccountEmail =
      _.get(funcObject, 'serviceAccountEmail') ||
      _.get(this, 'serverless.service.provider.serviceAccountEmail') ||
      null;
    funcTemplate.properties.availableMemoryMb =
      _.get(funcObject, 'memorySize') ||
      _.get(this, 'serverless.service.provider.memorySize') ||
      256;
    funcTemplate.properties.runtime = this.provider.getRuntime(funcObject);
    funcTemplate.properties.timeout =
      _.get(funcObject, 'timeout') || _.get(this, 'serverless.service.provider.timeout') || '60s';
    funcTemplate.properties.environmentVariables =
      this.provider.getConfiguredEnvironment(funcObject);

    if (!funcTemplate.properties.serviceAccountEmail) {
      delete funcTemplate.properties.serviceAccountEmail;
    }

    if (funcObject.vpc) {
      _.assign(funcTemplate.properties, {
        vpcConnector: _.get(funcObject, 'vpc') || _.get(this, 'serverless.service.provider.vpc'),
      });
    }

    if (funcObject.maxInstances) {
      funcTemplate.properties.maxInstances = funcObject.maxInstances;
    }

    if (!_.size(funcTemplate.properties.environmentVariables)) {
      delete funcTemplate.properties.environmentVariables;
    }

    funcTemplate.properties.labels = _.assign(
      {},
      _.get(this, 'serverless.service.provider.labels') || {},
      _.get(funcObject, 'labels') || {} // eslint-disable-line comma-dangle
    );

    const eventType = Object.keys(funcObject.events[0])[0];

    if (eventType === 'http') {
      const url = funcObject.events[0].http;

      funcTemplate.properties.httpsTrigger = {};
      funcTemplate.properties.httpsTrigger.url = url;
    }
    if (eventType === 'event') {
      const type = funcObject.events[0].event.eventType;
      const path = funcObject.events[0].event.path; //eslint-disable-line
      const resource = funcObject.events[0].event.resource;

      funcTemplate.properties.eventTrigger = {};
      funcTemplate.properties.eventTrigger.eventType = type;
      if (path) funcTemplate.properties.eventTrigger.path = path;
      funcTemplate.properties.eventTrigger.resource = resource;
    }

    this.serverless.service.provider.compiledConfigurationTemplate.resources.push(funcTemplate);
  },
  compileFunctions() {
    const artifactFilePath = this.serverless.service.package.artifact;
    const fileName = artifactFilePath.split(path.sep).pop();
    const projectName = _.get(this, 'serverless.service.provider.project');
    this.serverless.service.provider.region =
      this.serverless.service.provider.region || 'us-central1';
    this.serverless.service.package.artifactFilePath = `${this.serverless.service.package.artifactDirectoryName}/${fileName}`;

    const allFunctions = this.serverless.service.getAllFunctions();
    return BbPromise.each(allFunctions, (functionName) =>
      this.compileFunction(functionName, projectName)
    );
  },
};

const validateHandlerProperty = (funcObject, functionName) => {
  if (!funcObject.handler) {
    const errorMessage = [
      `Missing "handler" property for function "${functionName}".`,
      ' Your function needs a "handler".',
      ' Please check the docs for more info.',
    ].join('');
    throw new Error(errorMessage);
  }
};

const validateVpcConnectorProperty = (funcObject, functionName) => {
  if (funcObject.vpc && typeof funcObject.vpc === 'string') {
    const vpcNamePattern = /projects\/[\s\S]*\/locations\/[\s\S]*\/connectors\/[\s\S]*/i;
    if (!vpcNamePattern.test(funcObject.vpc)) {
      const errorMessage = [
        `The function "${functionName}" has invalid vpc connection name`,
        ' VPC Connector name should follow projects/{project_id}/locations/{region}/connectors/{connector_name}',
        ' Please check the docs for more info.',
      ].join('');
      throw new Error(errorMessage);
    }
  }
};

const getFunctionTemplate = (funcObject, projectName, region, sourceArchiveUrl) => {
  //eslint-disable-line
  return {
    type: 'gcp-types/cloudfunctions-v1:projects.locations.functions',
    name: funcObject.name,
    properties: {
      parent: `projects/${projectName}/locations/${region}`,
      availableMemoryMb: 256,
      runtime: 'nodejs10',
      timeout: '60s',
      entryPoint: funcObject.handler,
      function: funcObject.name,
      sourceArchiveUrl,
    },
  };
};