Issue with node shebang

[MarceloAlves]

Current Behavior

I could be doing something wrong here but creating a new "basic" project and adding the node shebang to index.ts and running yarn build --target node results in this error:

23:34:20 in tsdx-issue on  master is 📦  v0.1.0 via ⬢ v8.15.0 took 7s
➜ yarn build --target node
yarn run v1.15.2
warning package.json: No license field
$ tsdx build --target node
✓ Creating entry file 3.5 secs
Error when using sourcemap for reporting an error: Can't resolve original location of error.
Error when using sourcemap for reporting an error: Can't resolve original location of error.
Error when using sourcemap for reporting an error: Can't resolve original location of error.
Error when using sourcemap for reporting an error: Can't resolve original location of error.
(node:60781) UnhandledPromiseRejectionWarning: Error: Unexpected character '#' (Note that you need plugins to import files that are not JavaScript)
    at error (/Users/malves/Development/tmp/tsdx-issue/node_modules/rollup/dist/rollup.js:9236:30)
    at Module.error (/Users/malves/Development/tmp/tsdx-issue/node_modules/rollup/dist/rollup.js:12909:9)
    at tryParse (/Users/malves/Development/tmp/tsdx-issue/node_modules/rollup/dist/rollup.js:12825:16)
    at Module.setSource (/Users/malves/Development/tmp/tsdx-issue/node_modules/rollup/dist/rollup.js:13102:33)
    at Promise.resolve.catch.then.then.then (/Users/malves/Development/tmp/tsdx-issue/node_modules/rollup/dist/rollup.js:15924:20)
    at <anonymous>
(node:60781) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:60781) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
Error when using sourcemap for reporting an error: Can't resolve original location of error.
✨  Done in 5.38s.

Expected behavior

Should build without an error as far as I know.

Suggested solution(s)

Not quite sure where the issue lies here. Spent a bit of time digging around to see if maybe I could figure it out but wasn't very successful.

Additional context

Sample Repo

Your environment

Software	Version(s)
TSDX	0.5.11
TypeScript	3.4.5
Browser	Chrome 74
npm/Yarn	1.15.2
Operating System	macOS 10.14.4

[swyxio]

rollup seems to not handle this on purpose: rollup/rollup#235

we use @jaredpalmer's own shebang plugin: https://github.com/palmerhq/tsdx/blob/71817a33628983ee8a3adb4d10e852b5895d7a00/src/createRollupConfig.ts#L12 so it should work... will just leave it to you two to figure it out

[MarceloAlves]

👋 @sw-yx thanks for chiming in here

I hadn't seen that issue in my searching! I'm thinking my project it might be a better route to build with tsc and stick to using tsdx when it comes to web-based packages.

I don't have enough experience with rollup to really dig in here. I did see this plugin which adds the shebang afterwards so that users don't have to add it themselves. I replaced the current one in createRollupConfig.ts and it seemed to work okay. But it looks like the preserve one should work too

Thanks again!

[hedgerh]

Took a look into this. What's the desired output? A shebang in each bundle, or one in dist/index.js? If the former, one way I got it to work is by changing the preserve shebang plugin's processEntry function to remove the shebang from the files before being processed and rewrite them to disk:

function processEntry(entry) {
		if (entry) {
			let contents = fs.readFileSync(entry, 'utf8');
			let matches = contents.match(/^\s*(#!.*)/);
			shebang = matches && matches[1] || false;

                        // new code:
                        if (!shebang) return;
                        contents = contents.replace(shebang, '')
       	                fs.writeFileSync(entry, contents)
		}
	}

not sure if there's a better way to do that, but it worked. on the flip side, it seems pretty easy to also automate it so they don't have to add their own.

lemme know what'd be preferred and i can implement it

Edit: dug into rollup's hooks more and realized there was a transform hook to do this.

[jaredpalmer]

You just want it in the entry file that has it. Not in every one.