knit2wp can't see params when run from command line

[arencambre]

I have an R script that contains this command:

knit2wp(
  input = 'analysis.Rmd',
  title = 'COVID-19 stats for Dallas and Texas',
  publish = TRUE,
  action = "editPost",
  postid = 3275
)

The Rmd file has many plots, and the subtitle field of each uses a parameter.

When I run that script from RStudio, it works fine. The page looks fine.

When I run that script from the command prompt, using rscript.exe, every plot is substituted with this error text: ## Error in list2(..., title = title, subtitle = subtitle, caption = caption, : object 'params' not found

I've reproduced this on two machines, both running Windows 10H2 and R 4.0.3. One has RStudio 1.3, the other has RStudio 1.4 Preview.

This is my YAML header:

---
title: "COVID-19 stats for Dallas and Texas"
params:
  use_cache: TRUE
  produced_by: "produced by Aren Cambre"
output:
  html_document:
    df_print: paged
    toc: true
---

---

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[cderv]

For reference, this has also been asked on the community https://community.rstudio.com/t/knitr-from-command-line-object-params-not-found/91269/3

(Per the issue guide, it really helps us that cross posting is mentioned)

[arencambre]

I am now getting this same problem if I run knit2wp() from an R script from within RStudio. Between this time and the last time I successfully ran my script (from within RStudio), the only change is I upgraded to the latest versions of these packages:

• rlang 0.4.10
• cowplot 1.1.1
• ggplot2 3.3.3
• data.table 1.13.6

Only ggplot2 is explicitly used by my script. I am almost certain cowplot is not used. If rlang and data.table are used, it would only be reference.

For now, my workaround is to manually create a params list:

params <- list(produced_by = "string goes here")

[arencambre]

I made a trivial example and cannot reproduce. That doesn't mean the issue is invalid, just means the root cause may be harder to discern.

Relevant files attached. Note path in first line of the R script.
test.zip