ags

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

@@ -0,0 +1,56 @@
+/**
+ * @author Toru Nagashima
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+const getAllowModules = require("./get-allow-modules")
+const getPackageJson = require("./get-package-json")
+
+/**
+ * Checks whether or not each requirement target is published via package.json.
+ *
+ * It reads package.json and checks the target exists in `dependencies`.
+ *
+ * @param {RuleContext} context - A context to report.
+ * @param {string} filePath - The current file path.
+ * @param {ImportTarget[]} targets - A list of target information to check.
+ * @returns {void}
+ */
+exports.checkExtraneous = function checkExtraneous(context, filePath, targets) {
+    const packageInfo = getPackageJson(filePath)
+    if (!packageInfo) {
+        return
+    }
+
+    const allowed = new Set(getAllowModules(context))
+    const dependencies = new Set(
+        [packageInfo.name].concat(
+            Object.keys(packageInfo.dependencies || {}),
+            Object.keys(packageInfo.devDependencies || {}),
+            Object.keys(packageInfo.peerDependencies || {}),
+            Object.keys(packageInfo.optionalDependencies || {})
+        )
+    )
+
+    for (const target of targets) {
+        const extraneous =
+            target.moduleName != null &&
+            target.filePath != null &&
+            !dependencies.has(target.moduleName) &&
+            !allowed.has(target.moduleName)
+
+        if (extraneous) {
+            context.report({
+                node: target.node,
+                loc: target.node.loc,
+                messageId: "extraneous",
+                data: target,
+            })
+        }
+    }
+}
+
+exports.messages = {
+    extraneous: '"{{moduleName}}" is extraneous.',
+}