check-existence.js
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/**
* @fileoverview Rule to check whether or not `require()` is valid.
* @author Toru Nagashima
* @copyright 2015 Toru Nagashima. All rights reserved.
* See LICENSE file in root directory for full license.
*/
"use strict"
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const exists = require("./exists")
const getAllowModules = require("./get-allow-modules")
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
/**
* Checks whether or not each requirement target exists.
*
* It looks up the target according to the logic of Node.js.
* See Also: https://nodejs.org/api/modules.html
*
* @param {RuleContext} context - A context to report.
* @param {ImportTarget[]} targets - A list of target information to check.
* @returns {void}
*/
module.exports = function checkForExistence(context, targets) {
const allowed = new Set(getAllowModules(context))
for (const target of targets) {
const missingModule = (
target.moduleName != null &&
!allowed.has(target.moduleName) &&
target.filePath == null
)
const missingFile = (
target.moduleName == null &&
!exists(target.filePath)
)
if (missingModule || missingFile) {
context.report({
node: target.node,
loc: target.node.loc,
message: "\"{{name}}\" is not found.",
data: target,
})
}
}
}