refactor: eslint v8 compat (#397)

aladdin-add · web-flow · commit 86a524250dcc · 2024-12-24T17:03:32.000+08:00
diff --git a/lib/rules/callback-return.js b/lib/rules/callback-return.js
@@ -3,6 +3,7 @@
  * See LICENSE file in root directory for full license.
  */
 "use strict"
+const { getSourceCode } = require("../util/eslint-compat")
 
 /** @type {import('eslint').Rule.RuleModule} */
 module.exports = {
@@ -27,7 +28,7 @@ module.exports = {
 
     create(context) {
         const callbacks = context.options[0] || ["callback", "cb", "next"]
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
+        const sourceCode = getSourceCode(context)
 
         /**
          * Find the closest parent matching a list of types.
diff --git a/lib/rules/exports-style.js b/lib/rules/exports-style.js
@@ -5,6 +5,7 @@
 "use strict"
 
 const { hasParentNode } = require("../util/has-parent-node.js")
+const { getSourceCode, getScope } = require("../util/eslint-compat")
 
 /*istanbul ignore next */
 /**
@@ -302,7 +303,7 @@ module.exports = {
         const batchAssignAllowed = Boolean(
             context.options[1] != null && context.options[1].allowBatchAssign
         )
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
+        const sourceCode = getSourceCode(context)
 
         /**
          * Gets the location info of reports.
@@ -426,8 +427,8 @@ module.exports = {
         }
 
         return {
-            "Program:exit"(node) {
-                const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+            "Program:exit"() {
+                const scope = getScope(context)
 
                 switch (mode) {
                     case "module.exports":
diff --git a/lib/rules/global-require.js b/lib/rules/global-require.js
@@ -4,6 +4,8 @@
  */
 "use strict"
 
+const { getScope, getAncestors } = require("../util/eslint-compat")
+
 const ACCEPTABLE_PARENTS = [
     "AssignmentExpression",
     "VariableDeclarator",
@@ -59,26 +61,18 @@ module.exports = {
     },
 
     create(context) {
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-
         return {
             CallExpression(node) {
-                const currentScope =
-                    sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+                const currentScope = getScope(context, node)
 
                 if (
                     node.callee.type === "Identifier" &&
                     node.callee.name === "require" &&
                     !isShadowed(currentScope, node.callee)
                 ) {
-                    const isGoodRequire = (
-                        sourceCode.getAncestors?.(node) ??
-                        context.getAncestors()
-                    ) // TODO: remove context.getAncestors() when dropping support for ESLint < v9
-                        .every(
-                            parent =>
-                                ACCEPTABLE_PARENTS.indexOf(parent.type) > -1
-                        )
+                    const isGoodRequire = getAncestors(context, node).every(
+                        parent => ACCEPTABLE_PARENTS.indexOf(parent.type) > -1
+                    )
 
                     if (!isGoodRequire) {
                         context.report({ node, messageId: "unexpected" })
diff --git a/lib/rules/handle-callback-err.js b/lib/rules/handle-callback-err.js
@@ -4,6 +4,8 @@
  */
 "use strict"
 
+const { getScope } = require("../util/eslint-compat")
+
 /** @type {import('eslint').Rule.RuleModule} */
 module.exports = {
     meta: {
@@ -25,7 +27,6 @@ module.exports = {
     },
 
     create(context) {
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
         const errorArgument = context.options[0] || "err"
 
         /**
@@ -71,7 +72,7 @@ module.exports = {
          * @returns {void}
          */
         function checkForError(node) {
-            const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+            const scope = getScope(context, node)
             const parameters = getParameters(scope)
             const firstParameter = parameters[0]
 
diff --git a/lib/rules/hashbang.js b/lib/rules/hashbang.js
@@ -11,6 +11,7 @@ const getConvertPath = require("../util/get-convert-path")
 const { getPackageJson } = require("../util/get-package-json")
 const getNpmignore = require("../util/get-npmignore")
 const { isBinFile } = require("../util/is-bin-file")
+const { getSourceCode } = require("../util/eslint-compat")
 
 const ENV_SHEBANG = "#!/usr/bin/env"
 const NODE_SHEBANG = `${ENV_SHEBANG} {{executableName}}\n`
@@ -119,7 +120,7 @@ module.exports = {
         },
     },
     create(context) {
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
+        const sourceCode = getSourceCode(context)
         const filePath = context.filename ?? context.getFilename()
         if (filePath === "<input>") {
             return {}
diff --git a/lib/rules/no-deprecated-api.js b/lib/rules/no-deprecated-api.js
@@ -15,6 +15,7 @@ const getConfiguredNodeVersion = require("../util/get-configured-node-version")
 const getSemverRange = require("../util/get-semver-range")
 const extendTrackmapWithNodePrefix = require("../util/extend-trackmap-with-node-prefix")
 const unprefixNodeColon = require("../util/unprefix-node-colon")
+const { getScope } = require("../util/eslint-compat")
 
 /** @typedef {import('../unsupported-features/types.js').DeprecatedInfo} DeprecatedInfo */
 /**
@@ -820,10 +821,9 @@ module.exports = {
             })
         }
 
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
         return {
-            "Program:exit"(node) {
-                const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+            "Program:exit"() {
+                const scope = getScope(context)
 
                 const tracker = new ReferenceTracker(scope, {
                     mode: "legacy",
diff --git a/lib/rules/no-exports-assign.js b/lib/rules/no-exports-assign.js
@@ -5,6 +5,7 @@
 "use strict"
 
 const { findVariable } = require("@eslint-community/eslint-utils")
+const { getScope } = require("../util/eslint-compat")
 
 /**
  * @param {import('estree').Node} node
@@ -61,11 +62,9 @@ module.exports = {
         type: "problem",
     },
     create(context) {
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-
         return {
             AssignmentExpression(node) {
-                const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+                const scope = getScope(context)
 
                 if (
                     !isExports(node.left, scope) ||
diff --git a/lib/rules/no-path-concat.js b/lib/rules/no-path-concat.js
@@ -11,6 +11,7 @@ const {
     getStringIfConstant,
 } = require("@eslint-community/eslint-utils")
 const { hasParentNode } = require("../util/has-parent-node.js")
+const { getSourceCode } = require("../util/eslint-compat")
 
 /**
  * Get the first char of the specified template element.
@@ -195,7 +196,7 @@ module.exports = {
     create(context) {
         return {
             "Program:exit"(programNode) {
-                const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
+                const sourceCode = getSourceCode(context)
                 const globalScope =
                     sourceCode.getScope?.(programNode) ?? context.getScope()
                 const tracker = new ReferenceTracker(globalScope)
diff --git a/lib/rules/no-unsupported-features/es-syntax.js b/lib/rules/no-unsupported-features/es-syntax.js
@@ -10,6 +10,7 @@ const rangeSubset = require("semver/ranges/subset")
 const getConfiguredNodeVersion = require("../../util/get-configured-node-version")
 const getSemverRange = require("../../util/get-semver-range")
 const mergeVisitorsInPlace = require("../../util/merge-visitors-in-place")
+const { getScope } = require("../../util/eslint-compat")
 /** @type {Record<string, ESSyntax>} */
 const features = require("./es-syntax.json")
 
@@ -113,8 +114,7 @@ function normalizeScope(initialScope, node) {
  * @returns {boolean}
  */
 function isStrict(context, node) {
-    const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-    const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+    const scope = getScope(context)
     return normalizeScope(scope, node).isStrict
 }
 
diff --git a/lib/rules/prefer-promises/dns.js b/lib/rules/prefer-promises/dns.js
@@ -9,6 +9,7 @@ const {
     CONSTRUCT,
     ReferenceTracker,
 } = require("@eslint-community/eslint-utils")
+const { getScope } = require("../../util/eslint-compat")
 
 /** @type {import('@eslint-community/eslint-utils').TraceMap<boolean>} */
 const dns = {
@@ -57,9 +58,8 @@ module.exports = {
 
     create(context) {
         return {
-            "Program:exit"(node) {
-                const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-                const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+            "Program:exit"() {
+                const scope = getScope(context)
                 const tracker = new ReferenceTracker(scope, { mode: "legacy" })
                 const references = [
                     ...tracker.iterateCjsReferences(traceMap),
diff --git a/lib/rules/prefer-promises/fs.js b/lib/rules/prefer-promises/fs.js
@@ -5,6 +5,7 @@
 "use strict"
 
 const { CALL, ReferenceTracker } = require("@eslint-community/eslint-utils")
+const { getScope } = require("../../util/eslint-compat")
 
 /** @type {import('@eslint-community/eslint-utils').TraceMap<boolean>} */
 const traceMap = {
@@ -55,9 +56,8 @@ module.exports = {
 
     create(context) {
         return {
-            "Program:exit"(node) {
-                const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-                const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+            "Program:exit"() {
+                const scope = getScope(context)
                 const tracker = new ReferenceTracker(scope, { mode: "legacy" })
                 const references = [
                     ...tracker.iterateCjsReferences(traceMap),
diff --git a/lib/util/check-prefer-global.js b/lib/util/check-prefer-global.js
@@ -5,7 +5,7 @@
 "use strict"
 
 const { ReferenceTracker } = require("@eslint-community/eslint-utils")
-
+const { getScope } = require("../util/eslint-compat")
 /**
  * @typedef TraceMap
  * @property {import('@eslint-community/eslint-utils').TraceMap<boolean>} globals
@@ -36,9 +36,7 @@ class Verifier {
      */
     verifyToPreferGlobals() {
         const { context, traceMap } = this
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-        const scope =
-            sourceCode.getScope?.(sourceCode.ast) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+        const scope = getScope(context)
         const tracker = new ReferenceTracker(scope, {
             mode: "legacy",
         })
@@ -57,9 +55,7 @@ class Verifier {
      */
     verifyToPreferModules() {
         const { context, traceMap } = this
-        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-        const scope =
-            sourceCode.getScope?.(sourceCode.ast) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+        const scope = getScope(context)
         const tracker = new ReferenceTracker(scope)
 
         for (const { node } of tracker.iterateGlobalReferences(
diff --git a/lib/util/check-unsupported-builtins.js b/lib/util/check-unsupported-builtins.js
@@ -10,6 +10,7 @@ const getConfiguredNodeVersion = require("./get-configured-node-version")
 const getSemverRange = require("./get-semver-range")
 const unprefixNodeColon = require("./unprefix-node-colon")
 const semverRangeSubset = require("semver/ranges/subset")
+const { getScope } = require("../util/eslint-compat")
 
 /**
  * Parses the options.
@@ -86,8 +87,7 @@ module.exports.checkUnsupportedBuiltins = function checkUnsupportedBuiltins(
     traceMap
 ) {
     const options = parseOptions(context)
-    const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
-    const scope = sourceCode.getScope?.(sourceCode.ast) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+    const scope = getScope(context)
     const tracker = new ReferenceTracker(scope, { mode: "legacy" })
     const references = [
         ...tracker.iterateCjsReferences(traceMap.modules ?? {}),
diff --git a/lib/util/eslint-compat.js b/lib/util/eslint-compat.js
@@ -0,0 +1,43 @@
+/**
+ * @fileoverview Utilities for eslint compatibility.
+ * @see https://eslint.org/docs/latest/use/migrate-to-9.0.0#removed-context-methods
+ * @author aladdin-add<weiran.zsd@outlook.com>
+ */
+"use strict"
+
+/** @import { Rule } from 'eslint' */
+/** @typedef {import('estree').Node} Node */
+
+exports.getSourceCode = function (/** @type Rule.RuleContext */ context) {
+    return context.sourceCode || context.getSourceCode()
+}
+
+exports.getScope = function (
+    /** @type {Rule.RuleContext} */ context,
+    /** @type {Node} */ node
+) {
+    const sourceCode = exports.getSourceCode(context)
+    return sourceCode.getScope?.(node || sourceCode.ast) || context.getScope()
+}
+
+exports.getAncestors = function (
+    /** @type {Rule.RuleContext} */ context,
+    /** @type {Node} */ node
+) {
+    const sourceCode = exports.getSourceCode(context)
+    return sourceCode.getAncestors?.(node) || context.getAncestors()
+}
+
+exports.getCwd = function (/** @type {Rule.RuleContext} */ context) {
+    return context.cwd || context.getCwd()
+}
+
+exports.getPhysicalFilename = function (
+    /** @type {Rule.RuleContext} */ context
+) {
+    return context.physicalFilename || context.getPhysicalFilename?.()
+}
+
+exports.getFilename = function (/** @type {Rule.RuleContext} */ context) {
+    return context.filename || context.getFilename?.()
+}
diff --git a/lib/util/get-tsconfig.js b/lib/util/get-tsconfig.js
@@ -1,6 +1,7 @@
 "use strict"
 
 const { getTsconfig, parseTsconfig } = require("get-tsconfig")
+const { getPhysicalFilename, getFilename } = require("./eslint-compat")
 const fsCache = new Map()
 
 /**
@@ -30,12 +31,7 @@ function getTSConfigForFile(filename) {
  * @returns {import("get-tsconfig").TsConfigResult | null}
  */
 function getTSConfigForContext(context) {
-    // TODO: remove context.get(PhysicalFilename|Filename) when dropping eslint < v10
-    const filename =
-        context.physicalFilename ??
-        context.getPhysicalFilename?.() ??
-        context.filename ??
-        context.getFilename?.()
+    const filename = getPhysicalFilename(context) ?? getFilename(context)
 
     return getTSConfigForFile(filename)
 }
diff --git a/lib/util/is-typescript.js b/lib/util/is-typescript.js
@@ -1,6 +1,7 @@
 "use strict"
 
 const path = require("path")
+const { getPhysicalFilename, getFilename } = require("./eslint-compat")
 
 const typescriptExtensions = [".ts", ".tsx", ".cts", ".mts"]
 
@@ -12,10 +13,7 @@ const typescriptExtensions = [".ts", ".tsx", ".cts", ".mts"]
  */
 module.exports = function isTypescript(context) {
     const sourceFileExt = path.extname(
-        context.physicalFilename ??
-            context.getPhysicalFilename?.() ??
-            context.filename ??
-            context.getFilename?.()
+        getPhysicalFilename(context) ?? getFilename(context)
     )
     return typescriptExtensions.includes(sourceFileExt)
 }
diff --git a/lib/util/visit-import.js b/lib/util/visit-import.js
@@ -11,7 +11,7 @@ const getResolverConfig = require("./get-resolver-config")
 const getTryExtensions = require("./get-try-extensions")
 const ImportTarget = require("./import-target")
 const stripImportPathParams = require("./strip-import-path-params")
-
+const { getFilename } = require("./eslint-compat")
 /** @typedef {import('@typescript-eslint/typescript-estree').TSESTree.ImportDeclaration} ImportDeclaration */
 
 /**
@@ -38,9 +38,7 @@ module.exports = function visitImport(
 ) {
     /** @type {import('./import-target.js')[]} */
     const targets = []
-    const basedir = path.dirname(
-        path.resolve(context.filename ?? context.getFilename())
-    )
+    const basedir = path.dirname(path.resolve(getFilename(context)))
     const paths = getResolvePaths(context, optionIndex)
     const resolverConfig = getResolverConfig(context, optionIndex)
     const extensions = getTryExtensions(context, optionIndex)
diff --git a/lib/util/visit-require.js b/lib/util/visit-require.js
