Does not work on Windows

[TheLonelyAdventurer]

This plugin fails on Windows because of backslashes in paths.

This is my case:

esbuild.build({
  entryPoints: [ './src/index.js' ],
  bundle: true,
  outfile: './dist/bundle.js',
  plugins:
    [ esbuild_sass()
    , esbuild_css_modules(
    { localIdentName: "[local]--[hash:8:md5:hex]"
    , extension: '.module.css'
    }
    )
    ],
  minify: !isDev(),
  minifyIdentifiers: !isDev(),
  minifySyntax: !isDev(),
  minifyWhitespace: !isDev(),
  sourcemap: isDev() ? 'external' : false,
  platform: 'browser'
})

Which currently produces this result:

Error: Build failed with 1 error:
../../../AppData/Local/Temp/tmp-5848-66jQXSM4BQce/nuts/src/index.module.css:2:15: error: Could not resolve "C:Users\rmancAppDataAppDataLocalTemp\tmp-5848-66jQXSM4BQce\nutssrcindex.css" (mark it as external to exclude it from the bundle)
    at failureErrorWithLog (C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:1449:15)
    at C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:1131:28
    at runOnEndCallbacks (C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:921:63)
    at buildResponseToResult (C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:1129:7)
    at C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:1236:14
    at handleIncomingPacket (C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:706:9)
    at Socket.readFromStdout (C:\Users\rmanc\Documents\projs\nuts\node_modules\esbuild\lib\main.js:576:7)
    at Socket.emit (events.js:376:20)
    at addChunk (internal/streams/readable.js:309:12)
error Command failed with exit code 1.

I noticed the path C:Users\rmancAppDataAppDataLocalTemp\tmp-5848-66jQXSM4BQce\nutssrcindex.css and looked at the source:

esbuild-plugin-css-modules/index.ts

Lines 128 to 132 in 1f97e22

	let contents = `
	import "${tmpFilePath}";
	const result = ${JSON.stringify(classMap)};
	export default result;
	`;

The generated code looks like this:

import "C:\Users\rmanc\AppData\AppData\Local\Temp\tmp-5848-66jQXSM4BQce\nuts\src\index.css";
const result = {"test":"test--h0aba64c6"};
export default result;

which obviously doesn't work.

--

I've managed to make it work by wrapping tmpFilePath with https://github.com/sindresorhus/slash.

I'm writing a PR addressing this issue.