issues with png export

[dark-m0de]

Hi @rlespinasse,

thank you for providing this project. It was very helpful for me and inspired me to create my own version (to be used as a runner image in GitLab). Basically, I use the same commands in the dockerfile, just without entrypoint / cmd in the end.

Instead I have a drawio file with the following content that I put into /usr/local/bin

#!/usr/bin/env bash
set -euo pipefail

if [[ "${SUPPRESS_UNWANTED_OUTPUT:?}" == "true" ]]; then
  xvfb-run -a /opt/drawio/drawio "$@" --no-sandbox --disable-gpu 2>&1 | grep -Fvf "/opt/drawio-desktop/unwanted-output-lines.txt"
else
  xvfb-run -a /opt/drawio/drawio "$@" --no-sandbox --disable-gpu 2>&1
fi

While I can use this image inside my CI pipeline to call commands like drawio --help or to export PDF files, the png export seems to have problems.
The command drawio -x -o flow.png flow.drawio fails with the following output:

[212:0522/055006.581379:ERROR:validation_errors.cc(117)] Invalid message: VALIDATION_ERROR_DESERIALIZATION_FAILED
[212:0522/055006.581435:ERROR:interface_endpoint_client.cc(702)] Message 2131977360 rejected by interface viz.mojom.CopyOutputResultSender
[212:0522/055006.581524:ERROR:browser_child_process_host_impl.cc(754)] Terminating child process for bad message: Received bad user message: Validation failed for viz.mojom.CopyOutputResultSender.0  [VALIDATION_ERROR_DESERIALIZATION_FAILED]
Error: Export failed: flow.drawio

Did you, by any chance, once have a similar error and know how to fix this?

[dark-m0de]

P.S.: I also tried this, but had the same result

export DISPLAY=":42"
Xvfb ":42" -nolisten unix & /opt/drawio/drawio -x -o /opt/drawio-desktop/flow.png /opt/drawio-desktop/flow.drawio --no-sandbox --disable-gpu

[rlespinasse]

Hello,

Can you produce a test case GitLab repository snippet to help reproduce your issue?

On the drawio-export docker image (built on top of this docker image), someone uses it in GitLab.
Maybe the related issue snippets can help you: rlespinasse/drawio-export#82