Code/output blocks are split

[florisvdh]

Running the following in a bare R console:

reprex::reprex(
  {
    1:4
    2:5
  },
  session_info = TRUE
)

gives:

1:4
#> [1] 1 2 3 4

2:5
#> [1] 2 3 4 5

^{Created on 2024-05-29 with reprex v2.1.0.9000}

Session info

sessioninfo::session_info()
#> ─ Session info ───────────────────────────────────────────────────────────────
#>  setting  value
#>  version  R version 4.4.0 (2024-04-24)
#>  os       Linux Mint 21.3
#>  system   x86_64, linux-gnu
#>  ui       X11
#>  language nl_BE:nl
#>  collate  nl_BE.UTF-8
#>  ctype    nl_BE.UTF-8
#>  tz       Europe/Brussels
#>  date     2024-05-29
#>  pandoc   3.1.11 @ /usr/lib/rstudio/resources/app/bin/quarto/bin/tools/x86_64/ (via rmarkdown)
#> 
#> ─ Packages ───────────────────────────────────────────────────────────────────
#>  package     * version    date (UTC) lib source
#>  cli           3.6.2      2023-12-11 [3] RSPM (R 4.3.0)
#>  digest        0.6.35     2024-03-11 [3] RSPM (R 4.3.0)
#>  evaluate      0.23       2023-11-01 [3] RSPM (R 4.3.0)
#>  fastmap       1.2.0      2024-05-15 [3] RSPM (R 4.4.0)
#>  fs            1.6.4      2024-04-25 [3] RSPM (R 4.3.0)
#>  glue          1.7.0      2024-01-09 [3] RSPM (R 4.3.0)
#>  htmltools     0.5.8.1    2024-04-04 [3] RSPM (R 4.3.0)
#>  knitr         1.46       2024-04-06 [3] RSPM (R 4.3.0)
#>  lifecycle     1.0.4      2023-11-07 [3] RSPM (R 4.3.0)
#>  magrittr      2.0.3      2022-03-30 [3] RSPM (R 4.2.0)
#>  purrr         1.0.2      2023-08-10 [3] RSPM (R 4.2.0)
#>  R.cache       0.16.0     2022-07-21 [3] RSPM (R 4.2.0)
#>  R.methodsS3   1.8.2      2022-06-13 [3] RSPM (R 4.2.0)
#>  R.oo          1.26.0     2024-01-24 [3] RSPM (R 4.3.0)
#>  R.utils       2.12.3     2023-11-18 [3] RSPM (R 4.3.0)
#>  reprex        2.1.0.9000 2024-05-29 [1] Github (tidyverse/reprex@e1f65e9)
#>  rlang         1.1.3      2024-01-10 [3] RSPM (R 4.3.0)
#>  rmarkdown     2.27.1     2024-05-29 [1] Github (rstudio/rmarkdown@e1c93a9)
#>  rstudioapi    0.16.0     2024-03-24 [3] RSPM (R 4.3.0)
#>  sessioninfo   1.2.2      2021-12-06 [3] RSPM (R 4.2.0)
#>  styler        1.10.3     2024-04-07 [3] RSPM (R 4.3.0)
#>  vctrs         0.6.5      2023-12-01 [3] RSPM (R 4.3.0)
#>  withr         3.0.0      2024-01-16 [3] RSPM (R 4.3.2)
#>  xfun          0.44       2024-05-15 [3] RSPM (R 4.4.0)
#>  yaml          2.3.8      2023-12-11 [3] RSPM (R 4.3.0)
#> 
#>  [1] /home/floris/lib/R/library
#>  [2] /usr/local/lib/R/site-library
#>  [3] /usr/lib/R/site-library
#>  [4] /usr/lib/R/library
#> 
#> ──────────────────────────────────────────────────────────────────────────────

Before, {reprex} would keep code and output together in one block. More recently though, R version and rmarkdown versions have changed.

Running knitr::opts_chunk$set(collapse = TRUE) didn't solve it.

[cderv]

This is an issue with knitr, it seems we missed a breakage for the collapse options

With knitr 1.46

> xfun::raw_string(knitr::knit(text = c("```{r, collapse=TRUE}\n1 + 1\n1:1\n```")))
                                                                                                                                                                

``` r
1 + 1
## [1] 2
```

``` r
1:1
## [1] 1
```

With knitr 1.45

> xfun::raw_string(knitr::knit(text = c("```{r, collapse=TRUE}\n1 + 1\n1:1\n```")))
                                                                                                                                                                

```r
1 + 1
## [1] 2
1:1
## [1] 1
```

I'll fix it on knitr side.

[jennybc]

Thanks @cderv for tracking this down. I will close here and just wait for the fix to appear in a released version of knitr.

[hadley]

I'm seeing this problem again in knitr 1.47:

> packageVersion('knitr')
[1] ‘1.47’
> xfun::raw_string(knitr::knit(text = c("```{r, collapse=TRUE}\n1 + 1\n1:1\n```")))
1/1 [unnamed-chunk-1]

``` r
1 + 1
## [1] 2
```

``` r
1:1
## [1] 1
```

[cderv]

It is fixed in current knitr dev version, which will be knitr 1.48. It has not been released to CRAN yet.

@yihui could you do a knitr release so that this is solved for reprex ?

[yihui]

Can people wait for two more weeks? I've been exhausted recently. If there's a hurry, I can certainly make the release sooner, but CRAN just complained to me about my last release, so I tend not to make the next release too soon.

[hadley]

Yeah, no rush from my end.