mirror of
https://github.com/serverless/serverless.git
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3606589ff2
Calling .then here creates a new promise. One that is not returned and generating a rejection within that promise can lead to unhandledRejection events being inappropriately raised. As such, don't declare unneeded variables.
630 lines
24 KiB
JavaScript
630 lines
24 KiB
JavaScript
'use strict';
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const _ = require('lodash');
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const path = require('path');
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const replaceall = require('replaceall');
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const logWarning = require('./Error').logWarning;
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const BbPromise = require('bluebird');
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const os = require('os');
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const fse = require('../utils/fs/fse');
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class PromiseTracker {
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constructor() {
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this.promiseList = [];
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this.promiseMap = {};
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this.startTime = Date.now();
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}
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start() {
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this.interval = setInterval(this.report.bind(this), 2500);
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}
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report() {
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const delta = Date.now() - this.startTime;
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logWarning('################################################################################');
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logWarning(`# ${delta}: ${this.getSettled().length} of ${
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this.getAll().length} promises have settled`);
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const pending = this.getPending();
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logWarning(`# ${delta}: ${pending.length} unsettled promises:`);
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pending.forEach((promise) => {
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logWarning(`# ${delta}: ${promise.waitList}`);
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});
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logWarning('################################################################################');
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}
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stop() {
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clearInterval(this.interval);
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}
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add(variable, prms, specifier) {
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const promise = prms;
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promise.waitList = `${variable} waited on by: ${specifier}`;
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promise.state = 'pending';
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promise.then( // creates a promise with the following effects but that we otherwise ignore
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() => { promise.state = 'resolved'; },
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() => { promise.state = 'rejected'; });
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this.promiseList.push(promise);
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this.promiseMap[variable] = promise;
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return promise;
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}
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contains(variable) {
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return variable in this.promiseMap;
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}
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get(variable, specifier) {
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const promise = this.promiseMap[variable];
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promise.waitList += ` ${specifier}`;
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return promise;
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}
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getPending() { return this.promiseList.filter(p => (p.state === 'pending')); }
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getSettled() { return this.promiseList.filter(p => (p.state !== 'pending')); }
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getAll() { return this.promiseList; }
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}
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class Variables {
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constructor(serverless) {
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this.serverless = serverless;
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this.service = this.serverless.service;
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this.tracker = new PromiseTracker();
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this.overwriteSyntax = RegExp(/,/g);
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this.fileRefSyntax = RegExp(/^file\((~?[a-zA-Z0-9._\-/]+?)\)/g);
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this.envRefSyntax = RegExp(/^env:/g);
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this.optRefSyntax = RegExp(/^opt:/g);
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this.selfRefSyntax = RegExp(/^self:/g);
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this.cfRefSyntax = RegExp(/^cf:/g);
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this.s3RefSyntax = RegExp(/^s3:(.+?)\/(.+)$/);
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this.stringRefSyntax = RegExp(/('.*')|(".*")/g);
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this.ssmRefSyntax = RegExp(/^ssm:([a-zA-Z0-9_.\-/]+)[~]?(true|false)?/);
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}
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loadVariableSyntax() {
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this.variableSyntax = RegExp(this.service.provider.variableSyntax, 'g');
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}
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// #############
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// ## SERVICE ##
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// #############
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/**
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* Populate all variables in the service, conviently remove and restore the service attributes
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* that confuse the population methods.
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* @param processedOptions An options hive to use for ${opt:...} variables.
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* @returns {Promise.<TResult>|*} A promise resolving to the populated service.
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*/
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populateService(processedOptions) {
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this.options = processedOptions || {};
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this.loadVariableSyntax();
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// store
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const variableSyntaxProperty = this.service.provider.variableSyntax;
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// remove
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this.service.provider.variableSyntax = undefined; // otherwise matches itself
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this.service.serverless = undefined;
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this.tracker.start();
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return this.populateObject(this.service)
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.finally(() => {
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// restore
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this.tracker.stop();
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this.service.serverless = this.serverless;
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this.service.provider.variableSyntax = variableSyntaxProperty;
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})
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.then(() => this.service);
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}
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// ############
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// ## OBJECT ##
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// ############
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/**
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* The declaration of a terminal property. This declaration includes the path and value of the
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* property.
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* Example Input:
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* {
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* foo: {
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* bar: 'baz'
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* }
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* }
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* Example Result:
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* [
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* {
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* path: ['foo', 'bar']
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* value: 'baz
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* }
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* ]
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* @typedef {Object} TerminalProperty
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* @property {String[]} path The path to the terminal property
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* @property {Date|RegEx|String} The value of the terminal property
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*/
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/**
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* Generate an array of objects noting the terminal properties of the given root object and their
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* paths
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* @param root The object to generate a terminal property path/value set for
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* @param current The current part of the given root that terminal properties are being sought
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* within
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* @param [context] An array containing the path to the current object root (intended for internal
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* use)
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* @param [results] An array of current results (intended for internal use)
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* @returns {TerminalProperty[]} The terminal properties of the given root object, with the path
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* and value of each
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*/
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getProperties(root, atRoot, current, cntxt, rslts) {
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let context = cntxt;
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if (!context) {
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context = [];
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}
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let results = rslts;
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if (!results) {
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results = [];
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}
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const addContext = (value, key) =>
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this.getProperties(root, false, value, context.concat(key), results);
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if (
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_.isArray(current)
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) {
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_.map(current, addContext);
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} else if (
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_.isObject(current) &&
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!_.isDate(current) &&
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!_.isRegExp(current) &&
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!_.isFunction(current)
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) {
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if (atRoot || current !== root) {
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_.mapValues(current, addContext);
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}
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} else {
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results.push({ path: context, value: current });
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}
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return results;
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}
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/**
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* @typedef {TerminalProperty} TerminalPropertyPopulated
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* @property {Object} populated The populated value of the value at the path
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*/
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/**
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* Populate the given terminal properties, returning promises to do so
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* @param properties The terminal properties to populate
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* @returns {Promise<TerminalPropertyPopulated[]>[]} The promises that will resolve to the
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* populated values of the given terminal properties
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*/
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populateProperties(properties) {
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return _.map(properties, property =>
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this.populateValue(property.value, false)
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.then(populated => _.assign({}, property, { populated })));
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}
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/**
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* Assign the populated values back to the target object
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* @param target The object to which the given populated terminal properties should be applied
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* @param populations The fully populated terminal properties
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* @returns {Promise<number>} resolving with the number of changes that were applied to the given
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* target
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*/
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assignProperties(target, populations) { // eslint-disable-line class-methods-use-this
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return BbPromise.all(populations)
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.then((results) => {
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let changes = 0;
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results.forEach((result) => {
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if (result.value !== result.populated) {
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changes += 1;
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_.set(target, result.path, result.populated);
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}
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});
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return BbPromise.resolve(changes);
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});
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}
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/**
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* Populate the variables in the given object.
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* @param objectToPopulate The object to populate variables within.
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* @returns {Promise.<TResult>|*} A promise resolving to the in-place populated object.
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*/
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populateObject(objectToPopulate) {
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const leaves = this.getProperties(objectToPopulate, true, objectToPopulate);
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const populations = this.populateProperties(leaves);
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return this.assignProperties(objectToPopulate, populations)
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.then((changes) => {
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if (changes) {
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return this.populateObject(objectToPopulate);
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}
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return objectToPopulate;
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});
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}
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// ##############
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// ## PROPERTY ##
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// ##############
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/**
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* @typedef {Object} MatchResult
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* @property {String} match The original property value that matched the variable syntax
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* @property {String} variable The cleaned variable string that specifies the origin for the
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* property value
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*/
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/**
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* Get matches against the configured variable syntax
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* @param property The property value to attempt extracting matches from
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* @returns {Object|String|MatchResult[]} The given property or the identified matches
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*/
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getMatches(property) {
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if (typeof property !== 'string') {
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return property;
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}
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const matches = property.match(this.variableSyntax);
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if (!matches || !matches.length) {
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return property;
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}
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return _.map(matches, match => ({
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match,
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variable: match.replace(this.variableSyntax, (context, contents) => contents.trim())
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.replace(/\s/g, ''),
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}));
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}
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/**
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* Populate the given matches, returning an array of Promises which will resolve to the populated
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* values of the given matches
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* @param {MatchResult[]} matches The matches to populate
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* @returns {Promise[]} Promises for the eventual populated values of the given matches
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*/
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populateMatches(matches) {
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return _.map(matches, (match) => {
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if (match.variable.match(this.overwriteSyntax)) {
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return this.overwrite(match.variable);
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}
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return this.getValueFromSource(match.variable, match.match);
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});
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}
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/**
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* Render the given matches and their associated results to the given value
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* @param value The value into which to render the given results
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* @param matches The matches on the given value where the results are to be rendered
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* @param results The results that are to be rendered to the given value
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* @returns {*} The populated value with the given results rendered according to the given matches
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*/
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renderMatches(value, matches, results) {
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let result = value;
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for (let i = 0; i < matches.length; i += 1) {
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this.warnIfNotFound(matches[i].match, results[i]);
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result = this.populateVariable(result, matches[i].match, results[i]);
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}
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return result;
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}
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/**
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* Populate the given value, recursively if root is true
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* @param valueToPopulate The value to populate variables within
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* @param root Whether the caller is the root populator and thereby whether to recursively
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* populate
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* @returns {PromiseLike<T>} A promise that resolves to the populated value, recursively if root
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* is true
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*/
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populateValue(valueToPopulate, root) {
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const property = _.cloneDeep(valueToPopulate);
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const matches = this.getMatches(property);
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if (!_.isArray(matches)) {
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return BbPromise.resolve(property);
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}
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const populations = this.populateMatches(matches);
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return BbPromise.all(populations)
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.then(results => this.renderMatches(property, matches, results))
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.then((result) => {
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if (root && matches.length) {
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return this.populateValue(result);
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}
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return result;
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});
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}
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/**
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* Populate variables in the given property.
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* @param propertyToPopulate The property to populate (replace variables with their values).
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* @returns {Promise.<TResult>|*} A promise resolving to the populated result.
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*/
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populateProperty(propertyToPopulate) {
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return this.populateValue(propertyToPopulate, true);
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}
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/**
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* Populate a given property, given the matched string to replace and the value to replace the
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* matched string with.
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* @param propertyParam The property to replace the matched string with the value.
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* @param matchedString The string in the given property that was matched and is to be replaced.
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* @param valueToPopulate The value to replace the given matched string in the property with.
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* @returns {Promise.<TResult>|*} A promise resolving to the property populated with the given
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* value for all instances of the given matched string.
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*/
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populateVariable(propertyParam, matchedString, valueToPopulate) {
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let property = propertyParam;
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if (property === matchedString) { // total replacement
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property = valueToPopulate;
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} else if (_.isString(valueToPopulate)) { // partial replacement, string
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property = replaceall(matchedString, valueToPopulate, property);
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} else if (_.isNumber(valueToPopulate)) { // partial replacement, number
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property = replaceall(matchedString, String(valueToPopulate), property);
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} else {
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const errorMessage = [
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'Trying to populate non string value into',
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` a string for variable ${matchedString}.`,
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' Please make sure the value of the property is a string.',
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].join('');
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throw new this.serverless.classes.Error(errorMessage);
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}
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return property;
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}
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// ###############
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// ## VARIABLES ##
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// ###############
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/**
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* Overwrite the given variable string, resolve each variable and resolve to the first valid
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* value.
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* @param variableStringsString The overwrite string of variables to populate and choose from.
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* @returns {Promise.<TResult>|*} A promise resolving to the first validly populating variable
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* in the given variable strings string.
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*/
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overwrite(variableStringsString) {
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const variableStrings = variableStringsString.split(',');
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const variableValues = variableStrings.map(variableString =>
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this.getValueFromSource(variableString, variableStringsString));
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const validValue = value => (
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value !== null &&
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typeof value !== 'undefined' &&
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!(typeof value === 'object' && _.isEmpty(value))
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);
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return BbPromise.all(variableValues)
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.then(values => // find and resolve first valid value, undefined if none
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BbPromise.resolve(values.find(validValue)));
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}
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/**
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* Given any variable string, return the value it should be populated with.
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* @param variableString The variable string to retrieve a value for.
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* @returns {Promise.<TResult>|*} A promise resolving to the given variables value.
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*/
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getValueFromSource(variableString, propertyString) {
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let ret;
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if (this.tracker.contains(variableString)) {
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ret = this.tracker.get(variableString, propertyString);
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} else {
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if (variableString.match(this.envRefSyntax)) {
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ret = this.getValueFromEnv(variableString);
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} else if (variableString.match(this.optRefSyntax)) {
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ret = this.getValueFromOptions(variableString);
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} else if (variableString.match(this.selfRefSyntax)) {
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ret = this.getValueFromSelf(variableString);
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} else if (variableString.match(this.fileRefSyntax)) {
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ret = this.getValueFromFile(variableString);
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} else if (variableString.match(this.cfRefSyntax)) {
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ret = this.getValueFromCf(variableString);
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} else if (variableString.match(this.s3RefSyntax)) {
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ret = this.getValueFromS3(variableString);
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} else if (variableString.match(this.stringRefSyntax)) {
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ret = this.getValueFromString(variableString);
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} else if (variableString.match(this.ssmRefSyntax)) {
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ret = this.getValueFromSsm(variableString);
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} else {
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const errorMessage = [
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`Invalid variable reference syntax for variable ${variableString}.`,
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' You can only reference env vars, options, & files.',
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' You can check our docs for more info.',
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].join('');
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ret = BbPromise.reject(new this.serverless.classes.Error(errorMessage));
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}
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ret = this.tracker.add(variableString, ret, propertyString);
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}
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return ret;
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}
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getValueFromEnv(variableString) { // eslint-disable-line class-methods-use-this
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const requestedEnvVar = variableString.split(':')[1];
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let valueToPopulate;
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if (requestedEnvVar !== '' || '' in process.env) {
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valueToPopulate = process.env[requestedEnvVar];
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} else {
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valueToPopulate = process.env;
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}
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return BbPromise.resolve(valueToPopulate);
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}
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getValueFromString(variableString) { // eslint-disable-line class-methods-use-this
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const valueToPopulate = variableString.replace(/^['"]|['"]$/g, '');
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return BbPromise.resolve(valueToPopulate);
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}
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getValueFromOptions(variableString) {
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const requestedOption = variableString.split(':')[1];
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let valueToPopulate;
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if (requestedOption !== '' || '' in this.options) {
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valueToPopulate = this.options[requestedOption];
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} else {
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valueToPopulate = this.options;
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}
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return BbPromise.resolve(valueToPopulate);
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}
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getValueFromSelf(variableString) {
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const valueToPopulate = this.service;
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const deepProperties = variableString.split(':')[1].split('.');
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return this.getDeepValue(deepProperties, valueToPopulate);
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}
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getValueFromFile(variableString) {
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const matchedFileRefString = variableString.match(this.fileRefSyntax)[0];
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const referencedFileRelativePath = matchedFileRefString
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.replace(this.fileRefSyntax, (match, varName) => varName.trim())
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.replace('~', os.homedir());
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let referencedFileFullPath = (path.isAbsolute(referencedFileRelativePath) ?
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referencedFileRelativePath :
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path.join(this.serverless.config.servicePath, referencedFileRelativePath));
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// Get real path to handle potential symlinks (but don't fatal error)
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referencedFileFullPath = fse.existsSync(referencedFileFullPath) ?
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fse.realpathSync(referencedFileFullPath) :
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referencedFileFullPath;
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let fileExtension = referencedFileRelativePath.split('.');
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fileExtension = fileExtension[fileExtension.length - 1];
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// Validate file exists
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if (!this.serverless.utils.fileExistsSync(referencedFileFullPath)) {
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return BbPromise.resolve(undefined);
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}
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let valueToPopulate;
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// Process JS files
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if (fileExtension === 'js') {
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// eslint-disable-next-line global-require, import/no-dynamic-require
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const jsFile = require(referencedFileFullPath);
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const variableArray = variableString.split(':');
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let returnValueFunction;
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if (variableArray[1]) {
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let jsModule = variableArray[1];
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jsModule = jsModule.split('.')[0];
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returnValueFunction = jsFile[jsModule];
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} else {
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returnValueFunction = jsFile;
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}
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if (typeof returnValueFunction !== 'function') {
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const errorMessage = [
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'Invalid variable syntax when referencing',
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` file "${referencedFileRelativePath}".`,
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' Check if your javascript is exporting a function that returns a value.',
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].join('');
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return BbPromise.reject(new this.serverless.classes.Error(errorMessage));
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}
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valueToPopulate = returnValueFunction.call(jsFile);
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return BbPromise.resolve(valueToPopulate).then((valueToPopulateResolved) => {
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let deepProperties = variableString.replace(matchedFileRefString, '');
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deepProperties = deepProperties.slice(1).split('.');
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deepProperties.splice(0, 1);
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return this.getDeepValue(deepProperties, valueToPopulateResolved)
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.then((deepValueToPopulateResolved) => {
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|
if (typeof deepValueToPopulateResolved === 'undefined') {
|
|
const errorMessage = [
|
|
'Invalid variable syntax when referencing',
|
|
` file "${referencedFileRelativePath}".`,
|
|
' Check if your javascript is returning the correct data.',
|
|
].join('');
|
|
return BbPromise.reject(new this.serverless.classes.Error(errorMessage));
|
|
}
|
|
return BbPromise.resolve(deepValueToPopulateResolved);
|
|
});
|
|
});
|
|
}
|
|
|
|
// Process everything except JS
|
|
if (fileExtension !== 'js') {
|
|
valueToPopulate = this.serverless.utils.readFileSync(referencedFileFullPath);
|
|
if (matchedFileRefString !== variableString) {
|
|
let deepProperties = variableString
|
|
.replace(matchedFileRefString, '');
|
|
if (deepProperties.substring(0, 1) !== ':') {
|
|
const errorMessage = [
|
|
'Invalid variable syntax when referencing',
|
|
` file "${referencedFileRelativePath}" sub properties`,
|
|
' Please use ":" to reference sub properties.',
|
|
].join('');
|
|
return BbPromise.reject(new this.serverless.classes.Error(errorMessage));
|
|
}
|
|
deepProperties = deepProperties.slice(1).split('.');
|
|
return this.getDeepValue(deepProperties, valueToPopulate);
|
|
}
|
|
}
|
|
return BbPromise.resolve(valueToPopulate);
|
|
}
|
|
|
|
getValueFromCf(variableString) {
|
|
const variableStringWithoutSource = variableString.split(':')[1].split('.');
|
|
const stackName = variableStringWithoutSource[0];
|
|
const outputLogicalId = variableStringWithoutSource[1];
|
|
return this.serverless.getProvider('aws')
|
|
.request('CloudFormation',
|
|
'describeStacks',
|
|
{ StackName: stackName },
|
|
{ useCache: true })// Use request cache
|
|
.then((result) => {
|
|
const outputs = result.Stacks[0].Outputs;
|
|
const output = outputs.find(x => x.OutputKey === outputLogicalId);
|
|
|
|
if (output === undefined) {
|
|
const errorMessage = [
|
|
'Trying to request a non exported variable from CloudFormation.',
|
|
` Stack name: "${stackName}"`,
|
|
` Requested variable: "${outputLogicalId}".`,
|
|
].join('');
|
|
return BbPromise.reject(new this.serverless.classes.Error(errorMessage));
|
|
}
|
|
return BbPromise.resolve(output.OutputValue);
|
|
});
|
|
}
|
|
|
|
getValueFromS3(variableString) {
|
|
const groups = variableString.match(this.s3RefSyntax);
|
|
const bucket = groups[1];
|
|
const key = groups[2];
|
|
return this.serverless.getProvider('aws').request(
|
|
'S3',
|
|
'getObject',
|
|
{
|
|
Bucket: bucket,
|
|
Key: key,
|
|
},
|
|
{ useCache: true }) // Use request cache
|
|
.then(response => BbPromise.resolve(response.Body.toString()))
|
|
.catch((err) => {
|
|
const errorMessage = `Error getting value for ${variableString}. ${err.message}`;
|
|
return BbPromise.reject(new this.serverless.classes.Error(errorMessage));
|
|
});
|
|
}
|
|
|
|
getValueFromSsm(variableString) {
|
|
const groups = variableString.match(this.ssmRefSyntax);
|
|
const param = groups[1];
|
|
const decrypt = (groups[2] === 'true');
|
|
return this.serverless.getProvider('aws').request(
|
|
'SSM',
|
|
'getParameter',
|
|
{
|
|
Name: param,
|
|
WithDecryption: decrypt,
|
|
},
|
|
{ useCache: true }) // Use request cache
|
|
.then(response => BbPromise.resolve(response.Parameter.Value))
|
|
.catch((err) => {
|
|
const expectedErrorMessage = `Parameter ${param} not found.`;
|
|
if (err.message !== expectedErrorMessage) {
|
|
return BbPromise.reject(new this.serverless.classes.Error(err.message));
|
|
}
|
|
return BbPromise.resolve(undefined);
|
|
});
|
|
}
|
|
|
|
getDeepValue(deepProperties, valueToPopulate) {
|
|
return BbPromise.reduce(deepProperties, (computedValueToPopulateParam, subProperty) => {
|
|
let computedValueToPopulate = computedValueToPopulateParam;
|
|
if (typeof computedValueToPopulate === 'undefined') {
|
|
computedValueToPopulate = {};
|
|
} else if (subProperty !== '' || '' in computedValueToPopulate) {
|
|
computedValueToPopulate = computedValueToPopulate[subProperty];
|
|
}
|
|
if (typeof computedValueToPopulate === 'string' &&
|
|
computedValueToPopulate.match(this.variableSyntax)) {
|
|
return this.populateValue(computedValueToPopulate, false);
|
|
}
|
|
return BbPromise.resolve(computedValueToPopulate);
|
|
}, valueToPopulate);
|
|
}
|
|
|
|
warnIfNotFound(variableString, valueToPopulate) {
|
|
if (
|
|
valueToPopulate === null ||
|
|
typeof valueToPopulate === 'undefined' ||
|
|
(typeof valueToPopulate === 'object' && _.isEmpty(valueToPopulate))
|
|
) {
|
|
let varType;
|
|
if (variableString.match(this.envRefSyntax)) {
|
|
varType = 'environment variable';
|
|
} else if (variableString.match(this.optRefSyntax)) {
|
|
varType = 'option';
|
|
} else if (variableString.match(this.selfRefSyntax)) {
|
|
varType = 'service attribute';
|
|
} else if (variableString.match(this.fileRefSyntax)) {
|
|
varType = 'file';
|
|
} else if (variableString.match(this.ssmRefSyntax)) {
|
|
varType = 'SSM parameter';
|
|
}
|
|
logWarning(`A valid ${varType} to satisfy the declaration '${
|
|
variableString}' could not be found.`);
|
|
}
|
|
return valueToPopulate;
|
|
}
|
|
}
|
|
|
|
module.exports = Variables;
|