Output of vroom::vroom does not display properly in Quarto HTML

[allefeld]

This is what it looks like in an R session in a terminal:

This is what it looks like in a Quarto document rendered to HTML:

I obviously don't expect the terminal colors to be reproduced. But beyond that, output seems to be out of order, line breaks are not respected etc.

In case this is a bug in Quarto and not in vroom, I'm tagging @cscheid.

[cscheid]

@allefeld Can you provide a minimal example I can run myself?

[allefeld]

Here it is:

File test.qmd:

```{r}
df <- vroom::vroom("test.csv")
```

File test.csv (intentionally broken to trigger messages from vroom:

,Column 2,12
1,2,
,3,

Screenshot from rendered test.html:

Screenshot from same code run in a terminal:

Cell output HTML code:

<div class="cell-output cell-output-stderr">
<pre><code>New names:
Rows: 2 Columns: 3
── Column specification
──────────────────────────────────────────────────────── Delimiter: &quot;,&quot; dbl
(2): ...1, Column 2 lgl (1): 12
ℹ Use `spec()` to retrieve the full column specification for this data. ℹ
Specify the column types or set `show_col_types = FALSE` to quiet this message.
• `` -&gt; `...1`</code></pre>
</div>

[cscheid]

Thanks. This is the output of keep-md: true for me (which is the input that Quarto takes from knitr's output, effectively). It doesn't look like there's much that Quarto can do at this point:

---
title: vroom-537
keep-md: true
---


::: {.cell}

:::

::: {.cell}

```{.r .cell-code}
df <- vroom::vroom("test.csv")
```

::: {.cell-output .cell-output-stderr}

```
New names:
Rows: 2 Columns: 3
── Column specification
──────────────────────────────────────────────────────── Delimiter: "," dbl
(2): ...1, Column 2 lgl (1): 12
ℹ Use `spec()` to retrieve the full column specification for this data. ℹ
Specify the column types or set `show_col_types = FALSE` to quiet this message.
• `` -> `...1`
```


:::
:::

[allefeld]

Agreed, seems like vroom creates its output in a strange way. Control characters to move the cursor?

[jennybc]

This seems to have something to do with the name repair output (originating from vctrs::vec_as_names()) getting interleaved with the col spec summary (originating from summary.col_spec()). But somehow I only see the negative interaction when rendering a document vs., say, working in an R console.

vroom/R/col_types.R

Line 418 in d96a3b5

col_names <- vctrs::vec_as_names(col_names, repair = name_repair)

vroom/R/col_types.R

Lines 676 to 679 in d96a3b5

	cli_block(class = "vroom_spec_message", {
	cli::cli_h1("Column specification")
	cli::cli_verbatim(txt)
	})

The "problematic" call in the example given above (df <- vroom::vroom("test.csv")) looks fine if you also suppress name repair messaging.

Here's my .qmd:

---
title: "vroom #537"
format: html
---

```{r setup, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```{r}
df <- vroom::vroom(here::here("investigations/test.csv"))
```

Now we silence the name repair messaging.

```{r}
withr::with_options(
    list(rlib_name_repair_verbosity = "quiet"),
    df <- vroom::vroom(here::here("investigations/test.csv"))
)
```

Note that the second call to vroom::vroom() doesn't have the wonky line break behaviour for the col spec summary.