"error in callr subprocess": lintr-issue for excluded files

[strengejacke]

I'm using vscode (on Windows) and R 4.2.1, and I have following issue when diagnostics (supported by lintr) are enabled. For files that are not yet saved (i.e. do not exist on hard disk), or for files listed in the exclusion list, I get following warning:

Failed to run diagnostics: ! error in callr subprocess
Caused by error:
! Malformed config file, ensure it ends in a newline
Invalid DCF format.
Regular lines must have a tag.
Offending lines start with:
)
)lintr

It's always the first character in the first line that is highlighted (see screenshot).

My .lintr file looks like this:

linters: with_defaults(
  object_name_linter = NULL,
  object_length_linter(50),
  commented_code_linter = NULL,
  object_usage_linter = NULL,
  line_length_linter(120),
  cyclocomp_linter = cyclocomp_linter(50)
)

exclusions: list(
  "*.Rmd"
)

I'm not sure if this is a lintr-issue at all, but I thought starting an issue in this repo might be the most appropriate?

[AshesITR]

Hi @strengejacke,
that's indeed malformed.
You need a continuation indent of two spaces in dcf after a line break.

Try this, noting the terminal newline and the indented closing parentheses.

linters: with_defaults(
    object_name_linter = NULL,
    object_length_linter(50),
    commented_code_linter = NULL,
    object_usage_linter = NULL,
    line_length_linter(120),
    cyclocomp_linter = cyclocomp_linter(50)
  )

exclusions: list(
    "*.Rmd"
  )

[strengejacke]

Thanks, this works, at least the initial issue is resolved. Now I get a new error:

Failed to run diagnostics: ! error in callr subprocess
Caused by error in (function (linter, name) ...:
! Expected 'NA' to be a function of class 'linter', not a logical of class 'logical'lintr

Couldn't find anything clarifying on the internet yet...

[eitsupi]

Couldn't find anything clarifying on the internet yet...

Line 9, the empty line seems to be causing the problem.

By the way, I've read the documentation and I'm wondering if it is possible to specify files with wildcards (*).
https://lintr.r-lib.org/articles/lintr.html?q=exclusions#exclusions

[strengejacke]

Thanks, looks like everything is working as expected now!

[strengejacke]

(this is how it looks like now)

[MichaelChirico]

Definitely more evidence for #1210... these issues are hard to debug/explain. (also quite poorly documented at the moment)