P.S. Please ignore the code in the previous letter.
This is more "feature-full" (not working, but has explicit syncfs calls):
```
let FS;
async function run() {
Module = await createMyModule();
FS = Module.FS;
FS.mkdir('/project');
FS.mount(FS.filesystems.IDBFS, {}, '/project');
await sync();
FS.chdir('/project');
console.log(FS.analyzePath('content').exists); // <---- shows false on both
runs!
FS.writeFile('content', '...'); // write file on first run, expecting to see
it on the second
await sync();
}
async function sync() {
// should save/load existing data here? (doesn't work)
await new Promise((res, rej) => {
FS.syncfs(true, err => err ? rej(err) : res());
});
}
(async () => {
await run();
await run();
})();
```
> On 10 Feb 2023, at 09:43, Ilya Kantor <ilia...@gmail.com> wrote:
>
> Well... Yes, if we look at it this way, kind of makes a point.
>
> Does this code seem good?
>
> I expect the FS to keep the context of /project, but it doesn't (compiling
> with -lidbfs.js).
>
> async function initModule() {
> Module = await createMyModule();
>
> let FS = Module.FS;
>
> FS.mkdir('/project');
> FS.mount(FS.filesystems.IDBFS, {}, '/project');
> FS.chdir('/project');
> }
>
>
>> On 10 Feb 2023, at 02:06, chi...@gmail.com <chi...@gmail.com> wrote:
>>
>> MEMFS is an in-MEMory FileSytem. What you need is IndexedDB-based FS.
>>
>> On Friday, February 10, 2023 at 3:54:00 AM UTC+4 ili...@gmail.com wrote:
>>> I'm sorry to say so, but WASM memory and FS are two different things by
>>> design.
>>>
>>> There's no need to make things more complex than keeping FS while resetting
>>> memory.
>>> I do it with my computer every day (almost) ;)
>>>
>>> Kind regards,
>>> Ilya Kantor
>>>
>>>
>>>> On 10 Feb 2023, at 00:05, 'Sam Clegg' via emscripten-discuss
>>>> <emscripte...@googlegroups.com <>> wrote:
>>>>
>>>
>>>> If you are using MEMFS then its contents would (by design) be reset when
>>>> you reset your memory.
>>>>
>>>> If you want to preserve data between runs you would need some kind of
>>>> persistent store. Perhaps IDBFS?
>>>>
>>>> On Thu, Feb 9, 2023 at 2:34 PM Ilya Kantor <ili...@gmail.com <>> wrote:
>>>>> That's a great hint, thank you!
>>>>>
>>>>> I tried to do so, but bumped into a problem: I need to pass FS from the
>>>>> old module to the new one.
>>>>> I'm using the most basic default MEMFS.
>>>>>
>>>>> Any idea how to do it?
>>>>>
>>>>> Or maybe I should recursively walk and copy files? That's not the most
>>>>> elegant solution, but should work.
>>>>>
>>>>> Kind regards,
>>>>> Ilya Kantor
>>>>>
>>>>>> On 9 Feb 2023, at 20:30, 'Sam Clegg' via emscripten-discuss
>>>>>> <emscripte...@googlegroups.com <>> wrote:
>>>>>>
>>>>>> Hi Ilya,
>>>>>>
>>>>>> Emscripten doesn't have any way to do that today (at least not that I
>>>>>> know of).
>>>>>>
>>>>>> Your best bet is probably to use `-sMODULARIZE` and then construct a new
>>>>>> instance for each time you want to call `main`. i.e `new MyModule()`
>>>>>> each time.
>>>>>>
>>>>>> cheers,
>>>>>> sam
>>>>>>
>>>>>> On Thu, Feb 9, 2023 at 11:18 AM Ilya Kantor <ili...@gmail.com <>> wrote:
>>>>>>> Hello,
>>>>>>>
>>>>>>> I use Emscripten to compile a CLI application, and then run its _main
>>>>>>> many times.
>>>>>>>
>>>>>>> The problem is that it expects every call to be "from the scratch",
>>>>>>> with uninitialized data structures.
>>>>>>>
>>>>>>> Right now, e.g. a file has `struct my_type s`, and initializes it on
>>>>>>> the first run, then it survives till the second run and spoils it.
>>>>>>>
>>>>>>> How to re-init WASM, to clear memory for new runs (start afresh) while
>>>>>>> keeping FS untouched?
>>>>>>>
>>>>>>>
>>>>>>> --
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>>>>>>> https://groups.google.com/d/msgid/emscripten-discuss/140af2b7-874c-4308-8563-044e066fd89fn%40googlegroups.com
>>>>>>>
>>>>>>> <https://groups.google.com/d/msgid/emscripten-discuss/140af2b7-874c-4308-8563-044e066fd89fn%40googlegroups.com?utm_medium=email&utm_source=footer>.
>>>>>>
>>>>>>
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>>>>>>
>>>>>> <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va28RpzVOUzTAr3zO5bX%2BQWTq%3DdMn08Xwc2y9odMFZKmw-g%40mail.gmail.com?utm_medium=email&utm_source=footer>.
>>>>>
>>>>>
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>>>>>
>>>>> <https://groups.google.com/d/msgid/emscripten-discuss/D9B1D151-C606-4E89-AC79-823E58B61BA0%40gmail.com?utm_medium=email&utm_source=footer>.
>>>>
>>>>
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>>>
>>>> To view this discussion on the web visit
>>>> https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2-yO%2BOY6ANUzuBU5qOfv6BikyTonT5oUomOU4FbfHAwTA%40mail.gmail.com
>>>>
>>>> <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2-yO%2BOY6ANUzuBU5qOfv6BikyTonT5oUomOU4FbfHAwTA%40mail.gmail.com?utm_medium=email&utm_source=footer>.
>>>
>>
>>
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