ags

home/ags/node_modules/eslint-plugin-n/lib/util/check-existence.js

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+/**
+ * @author Toru Nagashima
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+const path = require("path")
+const exists = require("./exists")
+const getAllowModules = require("./get-allow-modules")
+const isTypescript = require("./is-typescript")
+const mapTypescriptExtension = require("../util/map-typescript-extension")
+
+/**
+ * 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}
+ */
+exports.checkExistence = function checkExistence(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
+
+        let missingFile = target.moduleName == null && !exists(target.filePath)
+        if (missingFile && isTypescript(context)) {
+            const parsed = path.parse(target.filePath)
+            const reversedExts = mapTypescriptExtension(
+                context,
+                target.filePath,
+                parsed.ext,
+                true
+            )
+            const reversedPaths = reversedExts.map(
+                reversedExt =>
+                    path.resolve(parsed.dir, parsed.name) + reversedExt
+            )
+            missingFile = reversedPaths.every(
+                reversedPath =>
+                    target.moduleName == null && !exists(reversedPath)
+            )
+        }
+        if (missingModule || missingFile) {
+            context.report({
+                node: target.node,
+                loc: target.node.loc,
+                messageId: "notFound",
+                data: target,
+            })
+        }
+    }
+}
+
+exports.messages = {
+    notFound: '"{{name}}" is not found.',
+}