Parallel execution command asyncapi generate got error

[Zacama]

Describe the bug

Parallel execution mulitple generate command

for file in "${files[@]}"
do
    asyncapi generate fromTemplate $file.json @asyncapi/html-template --param singleFile=true outFilename=$file.html --output ./generate --force-write &
done
wait

Command execution failure
Generation Error: ENOENT: no such file or directory, open '/root/generate/asyncapi/css/asyncapi.min.css'

How to Reproduce

some asyncapi json files

for file in "${files[@]}"
do
    asyncapi generate fromTemplate $file.json @asyncapi/html-template --param singleFile=true outFilename=$file.html --output ./generate --force-write &
done
wait

Expected behavior

success

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[derberg]

Hey there, what is the example $file.json value? /root/generate/asyncapi/css/asyncapi.min.css is a weird path

also, I understand that you tried running it just for one file, and all was fine?

[Zacama]

@derberg

Hello. For example, there are five asyncapi files in a directory. file1.json, file2.json, file3.json, file4.json, file5.json.

for file in [file1.json, file2.json, file3.json, file4.json, file5.json]
do
    asyncapi generate fromTemplate $file @asyncapi/html-template --param singleFile=true outFilename=$file.html --output ./generate --force-write & # (Adding this symbol ’&‘ allows the loop to continue executing instead of waiting here )
done
wait  #（Wait here for all commands to be executed）

If there is only one file under the folder, the execution will not fail.

My guess is that during the execution of the commands, they used a temporary folder with the same name. When one of the

commands deleted the temporary folder and the other command tried to read the temporary folder, this error was issued.

[derberg]

temporary folder is used only if output is not there -> https://github.com/asyncapi/cli/blob/master/src/commands/generate/fromTemplate.ts#L217C11-L217C20

I'm wondering if we might have a bug in html template. This is where the link from the error is coming from -> https://github.com/asyncapi/html-template/blob/master/template/index.html#L11-L16. But could be also issue with removal -> https://github.com/asyncapi/html-template/blob/master/hooks/01_removeNotRelevantParts.js

so the error pops up after first iteration, what is left on disk after error? is anything generated? if yes, then error with removal of css files, if not, then issue with including files inside html (I bet on this one)

[Zacama]

Hello, I created a demo that can reproduce this problem: https://github.com/Zacama/asyncapi-generate-test. Those four API documents are the same, copy from https://studio.asyncapi.com/

This is the result of my execution in codespace

If output is a different folder, there is no problem

[derberg]

ok, then it is for sure related to current version of html template.

it runs on old generator rendering engine based on Nunjucks. It forces us to do some hacks for singleFile parameter support. There is basically no conditional files generation, so we basically need to run such hooks after generation -> https://github.com/asyncapi/html-template/blob/master/hooks/01_removeNotRelevantParts.js#L25. So yeah, might happen that script tries to remove a file that was already removed by another run.

once asyncapi/html-template#448 is merged (that introduces react rendering, that is much more flexible) we can easily implement an alternative solution for hooks.

but for now, you will have to generate into unique directory per generation, sorry about that

[Zacama]

Okay, thank you~

[Zacama]

Hello, I updated the version of the template to 1.0.0 and tried executing it again in the same working directory, and got the following error.
https://github.com/Zacama/asyncapi-generate-test

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