(FunctionClauseError) no function clause matching in System.cmd/3 (Linux server) about elixir-pdf-generator

[feliperenan]

Hey @gutschilla

I've found the issue and it's my fault. The thing is that I misunderstood my Docker file (I was kind lost on it) since we have different images there and I couldn't get the required executables in the correct environment (the one that I was receiving the error).

So, once I was in the right env I able to check that with:

System.find_executable("chrome-headless-render-pdf")
#=> nil

But I still think we could improve that somehow in the library to thrown some friendly error when the executable is not found. I will try to understand this code a little bit more and if possible, I'll propose something for that.

I really appreciated your faster answers. Thank you very much and keep up with this awesome work 🙌

[feliperenan]

Sure, I'm still doing some investigation here and if I didn't find anything I will come up with some reproduced app. Just opened the issue to make sure I'm doing anything wrong and maybe others also are having it 😄

[gutschilla]

@feliperenan Added you as contributer. Allow me to create the boilerplate

[gutschilla]

@feliperenan Thanks for your investigation and congrats for solving the issue. You are right, this error should emit some friendly warning like "please check if your chrome-headless-renderer-pdf is installed correctly as I cannot find the executable on PATH" or something.

I am happy to hear you suggestions.

On a side note: if you have questions about the code let me know. The underlying base dates back to 2015/16. It's been a while.

[gutschilla]

I'll reopen this so a PR can properly point to this.

[gutschilla]

Alright @feliperenan thanks for opening a new issue. Please help me reproduce this error:

• Please provide the FROM-clause of your Dockerfile
• Please provide your mix.exs (deps and releases part)

Since reproducing this error by guessing you configuration is pretty time-consuming please consider granting me read access to your repo so I can at least run mix test which should yield an error.

[gutschilla]

Don't get me wrong – to reproduce I would have

• create project depending on :pdf_generator
• write a call to PdfGenerator.generate on startup
• prepare releases
• build release
• put that into a Docker container
• run it in hopes of seeing the error

I am looking for a shortcut to this :-)

[gutschilla]

@feliperenan We could do this together in a new github repo – I'd happily proivide the basics, you jot in your configuration.

[gutschilla]

https://github.com/gutschilla/test-pdf-generator-alpine-docker