Supress metadata printout when outputting to stdout (WSL)

[mbojan]

I'm playing with using the quarto CLI and output to stdout. At this moment I can:

$ quarto render test.qmd -t plain -o -
pandoc -o /tmp/quarto-sessionf2c34e6c/e419b0c8/a187d20f.txt
  to: plain
  standalone: true
  default-image-extension: png
  filters:
    - crossref

metadata
  author: mbojan

mbojan

Some text.

Is there an option to supress printing the metadata (the pandoc and metadata "sections")? There is --quiet but it suppresses the document content too. Thanks!

PS. I'm test-driving couple of things and plan to post some more questions. I'm assuming Discussions are better than Issues for that. Let me know if not.

Edit:

I'm running

$ quarto -v
0.9.293

and WSL:

[cscheid]

I think the easiest solution for now is to use mktemp on a shell, wait for quarto to finish, and then cat that file into the rest of your pipeline. I also just tried named pipes but they break quarto for a different reason. See #635 for details, but I think you're likely to run into sharp edges here, and using a temporary filename is very unlikely to be surprising to quarto's internal code.

[jjallaire]

The printing of the metadata should be to stderr rather than stdout, could you just redirect stderr? --quiet definitely shouldn't suppress stdout. I'll take a look at that soon.

[jjallaire]

I tested this and it does prevent printing of the extra output:

quarto render test.qmd -t plain -o - 2>/dev/null

Further, this also dropped the extra output and did indeed write the document to stdout:

quarto render test.qmd -t plain -o - --quiet

[mbojan]

It would be also interesting to know if just a plain pandoc call exhibits the same behavior under WSL.

It seems to be working on my WSL:

$ pandoc -i file.md -t plain --quiet -o -


TITLE


Content.

[jjallaire]

what about this:

$ quarto pandoc -i file.md -t plain --quiet -o -

[cderv]

Do you have a working WSL instance and if so can you repro this?

Yes I have a working WSL - I do most of my Linux work in it.

Using latest quarto, I cannot reproduce. It works for me doing this:

$ quarto render test.qmd -t plain --quiet -o -
Demo


Heading

Content

Not setting quiet will show the all log

$ quarto render test.qmd -t plain -o -
pandoc -o /tmp/quarto-sessionc45d6445/82d45df3/85ce81f7.txt
  to: plain
  standalone: true
  default-image-extension: png
  filters:
    - crossref
  
metadata
  title: Demo
  
Demo


Heading

Content

Regarding using Pandoc directly

# No argument ------
$ pandoc -i test.qmd -t plain
[WARNING] Could not deduce format from file extension .qmd
  Defaulting to markdown
Heading

Content

## reverse output with quarto - warning after 
$ quarto pandoc -i test.qmd -t plain
Heading

Content
[WARNING] Could not deduce format from file extension .qmd
  Defaulting to markdown

# Using quiet -------
$ pandoc -i test.qmd -t plain --quiet
Heading

Content

## However, no  output with quarto
$ quarto pandoc -i test.qmd -t plain --quiet


# Adding -o
$ pandoc -i test.qmd -t plain --quiet -o -
Heading

Content

## However, no  output with quarto
$ quarto pandoc -i test.qmd -t plain --quiet -o -

So in conclusion

• using --quiet with -o - seems to work as expected with quarto render.
• using --quiet with quarto pandoc will hide all output, but it should only hide the Warning like with pandoc

simple qmd file

---
title: "Demo"
format: html
---

# Heading

Content

[mbojan]

Interesting... I'll try again after updating to the most recent version of Quarto.

@cderv do you have WSL version 1 or 2?

[cderv]

❯ wsl --list --verbose
  NAME                   STATE           VERSION
* Ubuntu-20.04           Running         2

version 2