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loadServerlessConfig.js
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loadServerlessConfig.js
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/**
* NOTE: This is a really terrible hack that relies on the internals
* of serverless.
*/
const Serverless = require('serverless');
const path = require('path');
const fs = require('fs');
const util = require('./util');
// const testCWD = '/Users/sahajalal/workspace/conduit/file-service/backend';
const GlobalCache = new Map();
class ConfigServerless extends Serverless {
async getConfig(servicePath) {
this.processedInput = {
commands: [],
options: { stage: 'dev' },
};
this.config.servicePath = servicePath;
this.pluginManager.setCliOptions(this.processedInput.options);
this.pluginManager.setCliCommands(this.processedInput.commands);
await this.service.load(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();
});
}
}
const normalizeResources = config => {
if (!config.resources) {
return config.resources;
}
if (!config.resources.Resources) {
return {};
}
if (!Array.isArray(config.resources.Resources)) {
return config.resources;
}
const newResources = config.resources.Resources.reduce(
(sum, { Resources, Outputs = {} }) => ({
...sum,
...Resources,
Outputs: {
...(sum.Outputs || {}),
...Outputs,
},
}),
{},
);
return {
Resources: newResources,
};
};
const loadServerlessConfig = async (cwd = process.cwd()) => {
const stat = fs.statSync(cwd);
if (!stat.isDirectory()) {
// eslint-disable-next-line
cwd = path.dirname(cwd);
}
if (GlobalCache.has(cwd)) {
return { ...GlobalCache.get(cwd) };
}
const serverless = new ConfigServerless();
await serverless.getConfig(cwd);
const { service: config } = serverless;
const { custom = {} } = config;
const { appSync = {} } = custom;
util.flatteningMappingTemplatesAndDataSources(appSync);
const output = {
config: {
...config,
custom: {
...custom,
appSync: {
...appSync,
},
},
resources: normalizeResources(config),
},
directory: cwd,
};
GlobalCache.set(cwd, output);
return output;
};
module.exports = { loadServerlessConfig };