Simplify Windows-related code (#79)

source/spawn.js

@@ -1,7 +1,7 @@
 import {spawn} from 'node:child_process';
 import {once} from 'node:events';
 import process from 'node:process';
-import {getForcedShell, escapeArguments} from './windows.js';
+import {applyForceShell} from './windows.js';
 import {getResultError} from './result.js';
 
 export const spawnSubprocess = async (file, commandArguments, options, context) => {
@@ -13,11 +13,7 @@ export const spawnSubprocess = async (file, commandArguments, options, context)
 			? [process.execPath, [...process.execArgv.filter(flag => !flag.startsWith('--inspect')), ...commandArguments]]
 			: [file, commandArguments];
 
-		const forcedShell = await getForcedShell(file, options);
-		const instance = spawn(...escapeArguments(file, commandArguments, forcedShell), {
-			...options,
-			shell: options.shell || forcedShell,
-		});
+		const instance = spawn(...await applyForceShell(file, commandArguments, options));
 		bufferOutput(instance.stdout, context, 'stdout');
 		bufferOutput(instance.stderr, context, 'stderr');
 

source/windows.js

@@ -2,12 +2,18 @@ import {stat} from 'node:fs/promises';
 import path from 'node:path';
 import process from 'node:process';
 
+// When setting `shell: true` under-the-hood, we must manually escape the file and arguments.
+// This ensures arguments are properly split, and prevents command injection.
+export const applyForceShell = async (file, commandArguments, options) => await shouldForceShell(file, options)
+	? [escapeFile(file), commandArguments.map(argument => escapeArgument(argument)), {...options, shell: true}]
+	: [file, commandArguments, options];
+
 // On Windows, running most executable files (except *.exe and *.com) requires using a shell.
 // This includes *.cmd and *.bat, which itself includes Node modules binaries.
 // We detect this situation and automatically:
 //  - Set the `shell: true` option
 //  - Escape shell-specific characters
-export const getForcedShell = async (file, {shell, cwd, env = process.env}) => process.platform === 'win32'
+const shouldForceShell = async (file, {shell, cwd, env = process.env}) => process.platform === 'win32'
 	&& !shell
 	&& !(await isExe(file, cwd, env));
 
@@ -60,12 +66,6 @@ const mIsExe = async (file, cwd, PATH) => {
 // Other file extensions require using a shell
 const exeExtensions = ['.exe', '.com'];
 
-// When setting `shell: true` under-the-hood, we must manually escape the file and arguments.
-// This ensures arguments are properly split, and prevents command injection.
-export const escapeArguments = (file, commandArguments, forcedShell) => forcedShell
-	? [escapeFile(file), commandArguments.map(argument => escapeArgument(argument))]
-	: [file, commandArguments];
-
 // `cmd.exe` escaping for arguments.
 // Taken from https://github.com/moxystudio/node-cross-spawn
 const escapeArgument = argument => escapeFile(escapeFile(`"${argument