feat(linter): add fixer for prefer-node-protocol (#4129)

crates/oxc_linter/src/rules/unicorn/prefer_node_protocol.rs

@@ -1,5 +1,5 @@
 use oxc_ast::{
-    ast::{Expression, ModuleDeclaration},
+    ast::{Expression, ModuleDeclaration, TSModuleReference},
     AstKind,
 };
 use oxc_diagnostics::OxcDiagnostic;
@@ -43,6 +43,12 @@ impl Rule for PreferNodeProtocol {
                 }
                 _ => None,
             },
+            AstKind::TSImportEqualsDeclaration(import) => match &import.module_reference {
+                TSModuleReference::ExternalModuleReference(external) => {
+                    Some((external.expression.value.clone(), external.expression.span))
+                }
+                _ => None,
+            },
             AstKind::CallExpression(call) if !call.optional => {
                 call.common_js_require().map(|s| (s.value.clone(), s.span))
             }
@@ -73,7 +79,19 @@ impl Rule for PreferNodeProtocol {
             return;
         }
 
-        ctx.diagnostic(prefer_node_protocol_diagnostic(span, &string_lit_value));
+        ctx.diagnostic_with_fix(
+            prefer_node_protocol_diagnostic(span, &string_lit_value),
+            |fixer| {
+                // Smallest module name is 2 chars, plus 2 for quotes = 4.
+                debug_assert!(
+                    span.size() >= 4,
+                    "node stdlib module name should be at least 4 chars long"
+                );
+                // We're replacing inside the string literal, shift to account for quotes.
+                let span = span.shrink_left(1).shrink_right(1);
+                fixer.replace(span, format!("node:{string_lit_value}"))
+            },
+        );
     }
 }
 
@@ -86,7 +104,10 @@ fn test() {
         r#"import fs from "./fs";"#,
         r#"import fs from "unknown-builtin-module";"#,
         r#"import fs from "node:fs";"#,
+        r#"import * as fs from "node:fs";"#,
         r#"import "punycode / ";"#,
+        r#"import fs = require("node:fs");"#,
+        r#"import type fs = require("node:fs");"#,
         r#"const fs = require("node:fs");"#,
         r#"const fs = require("node:fs/promises");"#,
         r"const fs = require(fs);",
@@ -103,6 +124,8 @@ fn test() {
 
     let fail = vec![
         r#"import fs from "fs";"#,
+        r#"import * as fs from "fs";"#,
+        r#"import fs = require("fs");"#,
         r#"export {promises} from "fs";"#,
         r#"import fs from "fs/promises";"#,
         r#"export {default} from "fs/promises";"#,
@@ -118,5 +141,15 @@ fn test() {
         r"await import('assert/strict')",
     ];
 
-    Tester::new(PreferNodeProtocol::NAME, pass, fail).test_and_snapshot();
+    let fix = vec![
+        (r#"import fs from "fs";"#, r#"import fs from "node:fs";"#, None),
+        (r#"import * as fs from "fs";"#, r#"import * as fs from "node:fs";"#, None),
+        (r"import fs from 'fs';", r"import fs from 'node:fs';", None),
+        (r"const fs = require('fs');", r"const fs = require('node:fs');", None),
+        (r"import fs = require('fs');", r"import fs = require('node:fs');", None),
+        (r#"import "child_process";"#, r#"import "node:child_process";"#, None),
+        (r#"import fs from "fs/promises";"#, r#"import fs from "node:fs/promises";"#, None),
+    ];
+
+    Tester::new(PreferNodeProtocol::NAME, pass, fail).expect_fix(fix).test_and_snapshot();
 }

crates/oxc_linter/src/snapshots/prefer_node_protocol.snap

@@ -8,6 +8,20 @@ source: crates/oxc_linter/src/tester.rs
    ╰────
   help: Prefer `node:fs` over `fs`.
 
+  ⚠ eslint-plugin-unicorn(prefer-node-protocol): Prefer using the `node:` protocol when importing Node.js builtin modules.
+   ╭─[prefer_node_protocol.tsx:1:21]
+ 1 │ import * as fs from "fs";
+   ·                     ────
+   ╰────
+  help: Prefer `node:fs` over `fs`.
+
+  ⚠ eslint-plugin-unicorn(prefer-node-protocol): Prefer using the `node:` protocol when importing Node.js builtin modules.
+   ╭─[prefer_node_protocol.tsx:1:21]
+ 1 │ import fs = require("fs");
+   ·                     ────
+   ╰────
+  help: Prefer `node:fs` over `fs`.
+
   ⚠ eslint-plugin-unicorn(prefer-node-protocol): Prefer using the `node:` protocol when importing Node.js builtin modules.
    ╭─[prefer_node_protocol.tsx:1:24]
  1 │ export {promises} from "fs";