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home/ags/node_modules/eslint-plugin-n/lib/util/visit-import.js

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+/**
+ * @author Toru Nagashima
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+const path = require("path")
+const isCoreModule = require("is-core-module")
+const getResolvePaths = require("./get-resolve-paths")
+const getTryExtensions = require("./get-try-extensions")
+const ImportTarget = require("./import-target")
+const stripImportPathParams = require("./strip-import-path-params")
+
+/**
+ * Gets a list of `import`/`export` declaration targets.
+ *
+ * Core modules of Node.js (e.g. `fs`, `http`) are excluded.
+ *
+ * @param {RuleContext} context - The rule context.
+ * @param {Object} [options] - The flag to include core modules.
+ * @param {boolean} [options.includeCore] - The flag to include core modules.
+ * @param {number} [options.optionIndex] - The index of rule options.
+ * @param {boolean} [options.ignoreTypeImport] - The flag to ignore typescript type imports.
+ * @param {function(ImportTarget[]):void} callback The callback function to get result.
+ * @returns {ImportTarget[]} A list of found target's information.
+ */
+module.exports = function visitImport(
+    context,
+    { includeCore = false, optionIndex = 0, ignoreTypeImport = false } = {},
+    callback
+) {
+    const targets = []
+    const basedir = path.dirname(
+        path.resolve(context.filename ?? context.getFilename())
+    )
+    const paths = getResolvePaths(context, optionIndex)
+    const extensions = getTryExtensions(context, optionIndex)
+    const options = { basedir, paths, extensions }
+
+    return {
+        [[
+            "ExportAllDeclaration",
+            "ExportNamedDeclaration",
+            "ImportDeclaration",
+            "ImportExpression",
+        ]](node) {
+            const sourceNode = node.source
+
+            // skip `import(foo)`
+            if (
+                node.type === "ImportExpression" &&
+                sourceNode &&
+                sourceNode.type !== "Literal"
+            ) {
+                return
+            }
+
+            // skip `import type { foo } from 'bar'` (for eslint-typescript)
+            if (
+                ignoreTypeImport &&
+                node.type === "ImportDeclaration" &&
+                node.importKind === "type"
+            ) {
+                return
+            }
+
+            const name = sourceNode && stripImportPathParams(sourceNode.value)
+            // Note: "999" arbitrary to check current/future Node.js version
+            if (name && (includeCore || !isCoreModule(name, "999"))) {
+                targets.push(
+                    new ImportTarget(sourceNode, name, options, "import")
+                )
+            }
+        },
+
+        "Program:exit"() {
+            callback(targets)
+        },
+    }
+}