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Serverless.js
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Serverless.js
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'use strict';
const path = require('path');
const BbPromise = require('bluebird');
const os = require('os');
const ensureString = require('type/string/ensure');
const resolve = require('ncjsm/resolve');
const isModuleNotFoundError = require('ncjsm/is-module-not-found-error');
const CLI = require('./classes/CLI');
const Config = require('./classes/Config');
const YamlParser = require('./classes/YamlParser');
const PluginManager = require('./classes/PluginManager');
const Utils = require('./classes/Utils');
const Service = require('./classes/Service');
const Variables = require('./classes/Variables');
const ConfigSchemaHandler = require('./classes/ConfigSchemaHandler');
const ServerlessError = require('./classes/Error').ServerlessError;
const Version = require('./../package.json').version;
const isStandaloneExecutable = require('./utils/isStandaloneExecutable');
const resolveCliInput = require('./utils/resolveCliInput');
const logDeprecation = require('./utils/logDeprecation');
class Serverless {
constructor(config) {
let configObject = config;
configObject = configObject || {};
this.providers = {};
this.version = Version;
this.yamlParser = new YamlParser(this);
this.utils = new Utils(this);
this.service = new Service(this);
this.variables = new Variables(this);
this.pluginManager = new PluginManager(this);
this.configSchemaHandler = new ConfigSchemaHandler(this);
// use the servicePath from the options or try to find it in the CWD
this.cliInputArgv = process.argv.slice(2);
configObject.servicePath =
configObject.servicePath ||
this.utils.findServicePath(resolveCliInput(this.cliInputArgv).options.config);
this.config = new Config(this, configObject);
this.classes = {};
this.classes.CLI = CLI;
this.classes.YamlParser = YamlParser;
this.classes.Utils = Utils;
this.classes.Service = Service;
this.classes.Variables = Variables;
this.classes.Error = ServerlessError;
this.classes.PluginManager = PluginManager;
this.classes.ConfigSchemaHandler = ConfigSchemaHandler;
this.serverlessDirPath = path.join(os.homedir(), '.serverless');
this.isStandaloneExecutable = isStandaloneExecutable;
this.isLocallyInstalled = false;
this.isInvokedByGlobalInstallation = false;
this.triggeredDeprecations = logDeprecation.triggeredDeprecations;
}
init() {
// create an instanceId (can be e.g. used when a predictable random value is needed)
this.instanceId = new Date().getTime().toString();
// create a new CLI instance
this.cli = new this.classes.CLI(this, this.cliInputArgv);
// get an array of commands and options that should be processed
this.processedInput = this.cli.processInput();
// load config file
return this.pluginManager
.loadConfigFile()
.then(() => this.eventuallyFallbackToLocal())
.then(() => {
if (this.isOverridenByLocal) return null;
// set the options and commands which were processed by the CLI
this.pluginManager.setCliOptions(this.processedInput.options);
this.pluginManager.setCliCommands(this.processedInput.commands);
return this.service
.load(this.processedInput.options)
.then(() => {
// load all plugins
return this.pluginManager.loadAllPlugins(this.service.plugins);
})
.then(() => {
// give the CLI the plugins and commands so that it can print out
// information such as options when the user enters --help
this.cli.setLoadedPlugins(this.pluginManager.getPlugins());
this.cli.setLoadedCommands(this.pluginManager.getCommands());
return this.pluginManager.updateAutocompleteCacheFile();
});
});
}
eventuallyFallbackToLocal() {
if (
this.pluginManager.serverlessConfigFile &&
this.pluginManager.serverlessConfigFile.enableLocalInstallationFallback != null
) {
this._logDeprecation(
'DISABLE_LOCAL_INSTALLATION_FALLBACK_SETTING',
'Starting with next major version, "enableLocalInstallationFallback" setting will no longer be supported.' +
'CLI will unconditionally fallback to service local installation when its found.\n' +
'Remove this setting to clear this deprecation warning'
);
}
if (this.isLocallyInstalled) return null;
return resolve(process.cwd(), 'serverless').then(
({ realPath }) => {
if (realPath === __filename) {
this.isLocallyInstalled = true;
return null;
}
if (
this.pluginManager.serverlessConfigFile &&
this.pluginManager.serverlessConfigFile.enableLocalInstallationFallback != null &&
!this.pluginManager.serverlessConfigFile.enableLocalInstallationFallback
) {
return null;
}
this.cli.log('Running "serverless" installed locally (in service node_modules)');
// TODO: Replace below fallback logic with more straightforward one at top of the CLI
// when we willl drop support for the "disableLocalInstallationFallback" setting
this.isOverridenByLocal = true;
const ServerlessLocal = require(realPath);
const serverlessLocal = new ServerlessLocal();
serverlessLocal.isLocallyInstalled = true;
serverlessLocal.isInvokedByGlobalInstallation = true;
this.invokedInstance = serverlessLocal;
return serverlessLocal.init();
},
error => {
if (!isModuleNotFoundError(error, 'serverless')) throw error;
}
);
}
run() {
if (this.cli.displayHelp(this.processedInput)) {
return BbPromise.resolve();
}
this.cli.suppressLogIfPrintCommand(this.processedInput);
// make sure the command exists before doing anything else
this.pluginManager.validateCommand(this.processedInput.commands);
// populate variables after --help, otherwise help may fail to print
// (https://github.com/serverless/serverless/issues/2041)
return this.variables.populateService(this.pluginManager.cliOptions).then(() => {
// merge arrays after variables have been populated
// (https://github.com/serverless/serverless/issues/3511)
this.service.mergeArrays();
// populate function names after variables are loaded in case functions were externalized
// (https://github.com/serverless/serverless/issues/2997)
this.service.setFunctionNames(this.processedInput.options);
// validate the service configuration, now that variables are loaded
this.service.validate();
// trigger the plugin lifecycle when there's something which should be processed
return this.pluginManager.run(this.processedInput.commands);
});
}
setProvider(name, provider) {
this.providers[name] = provider;
}
getProvider(name) {
return this.providers[name] ? this.providers[name] : false;
}
getVersion() {
return this.version;
}
// Only for internal use
_logDeprecation(code, message) {
return logDeprecation(code, message, { serviceConfig: this.service });
}
// To be used by external plugins
logDeprecation(code, message) {
return this._logDeprecation(`EXT_${ensureString(code)}`, ensureString(message));
}
}
module.exports = Serverless;