rsconnect::writeManifest() fails to infer appPrimaryDoc when file is Quarto (.qmd) not Markdown (.Rmd)

[fh-mthomson]

To test:

1. Open Project: https://github.com/fh-mthomson/rsconnect_quarto
2. renv::restore()
3. Try to create OR update the manifest.json file:

> rsconnect::writeManifest()
Error in `quartoInspect()`:
! Failed to run `quarto inspect` against your content:
ERROR: /home/michael.thomson/rsconnect_quarto/.Rprofile is not a valid Quarto input document

Stack trace:
at inspectConfig (file:///opt/quarto/1.5.56/bin/quarto.js:101501:19)
at async Command.actionHandler (file:///opt/quarto/1.5.56/bin/quarto.js:101515:20)
at async Command.execute (file:///opt/quarto/1.5.56/bin/quarto.js:8017:13)
at async Command.parseCommand (file:///opt/quarto/1.5.56/bin/quarto.js:7907:20)
at async quarto (file:///opt/quarto/1.5.56/bin/quarto.js:118224:9)
at async file:///opt/quarto/1.5.56/bin/quarto.js:118244:9
at async mainRunner (file:///opt/quarto/1.5.56/bin/quarto.js:118128:9)
at async file:///opt/quarto/1.5.56/bin/quarto.js:118235:5
Run `rlang::last_trace()` to see where the error occurred.

4. Then, manually specifying works:

> rsconnect::writeManifest(appPrimaryDoc = "doc.qmd")
ℹ Capturing R dependencies from renv.lock
✔ Found 46 dependencies

In contrast, if you rename to doc.Rmd, it works off the shelf.

[aronatkins]

Thanks so much for reporting this issue. I've got a pending fix that should land shortly.