mirror of
https://github.com/serverless/serverless.git
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63 lines
2.2 KiB
JavaScript
63 lines
2.2 KiB
JavaScript
'use strict';
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const Ajv = require('ajv').default;
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const objectHash = require('object-hash');
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const path = require('path');
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const os = require('os');
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const standaloneCode = require('ajv/dist/standalone').default;
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const fs = require('fs');
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const requireFromString = require('require-from-string');
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const deepSortObjectByKey = require('../../utils/deepSortObjectByKey');
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const ensureExists = require('../../utils/ensureExists');
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const getCacheDir = () => {
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return path.resolve(
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process.env.SLS_SCHEMA_CACHE_BASE_DIR || os.homedir(),
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`.serverless/artifacts/ajv-validate-${require('ajv/package').version}`
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);
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};
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// Validators are cached by schema hash for the purpose
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// of speeding up tests and reducing their memory footprint.
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// If that solution proves to not be enough, we can improve it
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// with `uni-global` package.
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const cachedValidatorsBySchemaHash = {};
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const getValidate = async (schema) => {
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const schemaHash = objectHash(deepSortObjectByKey(schema));
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if (cachedValidatorsBySchemaHash[schemaHash]) {
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return cachedValidatorsBySchemaHash[schemaHash];
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}
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const filename = `${schemaHash}.js`;
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const cachePath = path.resolve(getCacheDir(), filename);
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const generate = async () => {
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const ajv = new Ajv({
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allErrors: true,
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coerceTypes: 'array',
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verbose: true,
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strict: true,
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strictRequired: false,
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code: { source: true },
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});
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require('ajv-formats').default(ajv);
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// Ensure AJV related packages work well when there are mutliple AJV installations around
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// See: https://github.com/ajv-validator/ajv/issues/1390#issuecomment-763138202
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ajv.opts.code.formats = Ajv._`require("ajv-formats/dist/formats").fullFormats`;
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ajv.addKeyword(require('./regexpKeyword'));
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const validate = ajv.compile(schema);
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const moduleCode = standaloneCode(ajv, validate);
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await fs.promises.writeFile(cachePath, moduleCode);
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};
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await ensureExists(cachePath, generate);
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const loadedModuleCode = await fs.promises.readFile(cachePath, 'utf-8');
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const validator = requireFromString(
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loadedModuleCode,
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path.resolve(__dirname, `[generated-ajv-validate]${filename}`)
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);
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cachedValidatorsBySchemaHash[schemaHash] = validator;
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return validator;
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};
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module.exports = getValidate;
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