fix: normalize windows runtime shim executables

src/infra/exec-wrapper-resolution.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, test } from "vitest";
+import { normalizeExecutableToken } from "./exec-wrapper-resolution.js";
+
+describe("normalizeExecutableToken", () => {
+  test("strips common windows executable suffixes", () => {
+    expect(normalizeExecutableToken("bun.cmd")).toBe("bun");
+    expect(normalizeExecutableToken("deno.bat")).toBe("deno");
+    expect(normalizeExecutableToken("pwsh.com")).toBe("pwsh");
+    expect(normalizeExecutableToken("cmd.exe")).toBe("cmd");
+  });
+
+  test("normalizes path-qualified windows shims", () => {
+    expect(normalizeExecutableToken("C:\\tools\\bun.cmd")).toBe("bun");
+    expect(normalizeExecutableToken("/tmp/deno.exe")).toBe("deno");
+  });
+});

src/infra/exec-wrapper-resolution.ts

@@ -7,7 +7,7 @@ import {
 
 export const MAX_DISPATCH_WRAPPER_DEPTH = 4;
 
-const WINDOWS_EXE_SUFFIX = ".exe";
+const WINDOWS_EXECUTABLE_SUFFIXES = [".exe", ".cmd", ".bat", ".com"] as const;
 
 const POSIX_SHELL_WRAPPER_NAMES = ["ash", "bash", "dash", "fish", "ksh", "sh", "zsh"] as const;
 const WINDOWS_CMD_WRAPPER_NAMES = ["cmd"] as const;
@@ -31,13 +31,18 @@ function withWindowsExeAliases(names: readonly string[]): string[] {
   const expanded = new Set<string>();
   for (const name of names) {
     expanded.add(name);
-    expanded.add(`${name}${WINDOWS_EXE_SUFFIX}`);
+    expanded.add(`${name}.exe`);
   }
   return Array.from(expanded);
 }
 
-function stripWindowsExeSuffix(value: string): string {
-  return value.endsWith(WINDOWS_EXE_SUFFIX) ? value.slice(0, -WINDOWS_EXE_SUFFIX.length) : value;
+function stripWindowsExecutableSuffix(value: string): string {
+  for (const suffix of WINDOWS_EXECUTABLE_SUFFIXES) {
+    if (value.endsWith(suffix)) {
+      return value.slice(0, -suffix.length);
+    }
+  }
+  return value;
 }
 
 export const POSIX_SHELL_WRAPPERS = new Set(POSIX_SHELL_WRAPPER_NAMES);
@@ -115,7 +120,7 @@ export function basenameLower(token: string): string {
 }
 
 export function normalizeExecutableToken(token: string): string {
-  return stripWindowsExeSuffix(basenameLower(token));
+  return stripWindowsExecutableSuffix(basenameLower(token));
 }
 
 export function isDispatchWrapperExecutable(token: string): boolean {
@@ -132,7 +137,7 @@ function normalizeRawCommand(rawCommand?: string | null): string | null {
 }
 
 function findShellWrapperSpec(baseExecutable: string): ShellWrapperSpec | null {
-  const canonicalBase = stripWindowsExeSuffix(baseExecutable);
+  const canonicalBase = stripWindowsExecutableSuffix(baseExecutable);
   for (const spec of SHELL_WRAPPER_SPECS) {
     if (spec.names.has(canonicalBase)) {
       return spec;