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Contents
/**
* @fileoverview Provide the function that emits deprecation warnings.
* @author Toru Nagashima <http://github.com/mysticatea>
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const path = require("path");
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
// Definitions for deprecation warnings.
const deprecationWarningMessages = {
ESLINT_LEGACY_ECMAFEATURES:
"The 'ecmaFeatures' config file property is deprecated and has no effect."
};
const sourceFileErrorCache = new Set();
/**
* Emits a deprecation warning containing a given filepath. A new deprecation warning is emitted
* for each unique file path, but repeated invocations with the same file path have no effect.
* No warnings are emitted if the `--no-deprecation` or `--no-warnings` Node runtime flags are active.
* @param {string} source The name of the configuration source to report the warning for.
* @param {string} errorCode The warning message to show.
* @returns {void}
*/
function emitDeprecationWarning(source, errorCode) {
const cacheKey = JSON.stringify({ source, errorCode });
if (sourceFileErrorCache.has(cacheKey)) {
return;
}
sourceFileErrorCache.add(cacheKey);
const rel = path.relative(process.cwd(), source);
const message = deprecationWarningMessages[errorCode];
process.emitWarning(
`${message} (found in "${rel}")`,
"DeprecationWarning",
errorCode
);
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
emitDeprecationWarning
};
Version data entries
37 entries across 27 versions & 2 rubygems