[Issue]: readFile is splitting files in VFS src

[MarketingPip]

When readFile is calling a file inside "src" like

{
   "src": {
       "textFile.txt": "Hello from the text file!",
   }
}

import { readFileSync, readFile, writeFileSync } from 'node:fs'
async function run(){
readFile('./textFile.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

console.log(readFileSync('./textFile.txt'))
}
await run()

we get:

Hello;
from;
the;
text;
file;
Hello;
from;
the;
text;
file;

When not in src like:

{
   "src": {},
   "textFile.txt": "Hello from the text file!",
}

We get:

Hello from the text file!
Hello from the text file!

[sebastianwessel]

What exactly is the issue?

This one is event/stream based, where you get only partial parts, which are printed out to the console log. Each partial data is printed out as a new line.

readFile('./textFile.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

This prints:

Hello from the text file!

The other console.log(readFileSync('./textFile.txt')) will read the whole file content and as it is sync, it will block until the whole file content is read and printed out. This prints:

Hello from the text file!

The single line will be printed out first, as the stream based one is executed in the next tick, after console.log(readFileSync('./textFile.txt')) has finished

[MarketingPip]

@sebastianwessel - my bad. It seems I have documented this issue in correctly. See below (and revised above)....

When using like this:

{
   "src": {
       "textFile.txt": "Hello from the text file!",
   }
}

import { readFileSync, readFile, writeFileSync } from 'node:fs'
async function run(){
readFile('./textFile.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

console.log(readFileSync('./textFile.txt'))
}
await run()

we get:

Hello;
from;
the;
text;
file;
Hello;
from;
the;
text;
file;

[sebastianwessel]

Your code must be at least look like the code below, as readFile is event based. The code execution will continue after call readFile, while calling the callback.

import { readFileSync, readFile, writeFileSync } from 'node:fs'
async function run(){

await new Promise((resolve)=>{
  readFile('./textFile.txt', 'utf8', (err, data) => {
    if (err) throw err;
    console.log('1', data);
    resolve()
  });
})

console.log('2',readFileSync('./textFile.txt'))
}
await run()

The output without the Promise is

2 Hello from the text file!
1 Hello from the text file!

I tried it on the current working branch, and there are no new lines at all, as - as far as I remember - it is always readFileSync behind the scene. We use a vfs, and we have the file already in memory anyway.

[MarketingPip]

@sebastianwessel - just digging into this on my end. This seems to be an issue with MY code and not the library.

TDLR; My output handler wasn't properly formatting things.