How can I use usethis to increase version of my R package on google cloud platform?

I'm trying to increase the version of my package an R session on google cloud platform. I think I must be missing something because I thought when which was set that the code should be able to run without further user input.

rlang::is_interactive() returns FALSE as I'd expect.

usethis::use_version(which = "minor")
✔ Setting active project to '/home/jupyter/x/y'

Error: User input required, but session is not interactive.
Query: There are uncommitted changes and you're about to bump version
Do you want to proceed anyway?
Traceback:

1. usethis::use_version("minor")
2. challenge_uncommitted_changes(msg = "There are uncommitted changes and you're about to bump version")
3. ui_yeah("{msg}\nDo you want to proceed anyway?")
4. ui_stop(c("User input required, but session is not interactive.", 
 .     "Query: {x}"))

Here's the function code: https://github.com/r-lib/usethis/blob/master/R/version.R

function (which = NULL) 
{
    if (is.null(which) && !is_interactive()) {
        return(invisible(FALSE))
    }
    check_is_package("use_version()")
    challenge_uncommitted_changes(msg = "There are uncommitted changes and you're about to bump version")
    new_ver <- choose_version("What should the new version be?", 
        which)
    if (is.null(new_ver)) {
        return(invisible(FALSE))
    }
    use_description_field("Version", new_ver, overwrite = TRUE)
    if (names(new_ver) == "dev") {
        use_news_heading("(development version)")
    }
    else {
        use_news_heading(new_ver)
    }
    use_c_version(new_ver)
    git_ask_commit("Increment version number", untracked = TRUE, 
        paths = c("DESCRIPTION", "NEWS.md", path("src", "version.c")))
    invisible(TRUE)
}

Is this a possible bug in choose_version()?

R Version

platform       x86_64-pc-linux-gnu         
arch           x86_64                      
os             linux-gnu                   
system         x86_64, linux-gnu           
status                                     
major          3                           
minor          6.3                         
year           2020                        
month          02                          
day            29                          
svn rev        77875                       
language       R                           
version.string R version 3.6.3 (2020-02-29)
nickname       Holding the Windsock  

This problem was driven by uncommitted changes in the repository, this triggered interactive behaviour in use_version.

Specifically in challenge_uncommitted_changes(msg = "There are uncommitted changes and you're about to bump version").

This caused the error message to be returned.

I fixed this by committing all untracked/modified files.

I've flagged this to the package maintainers, as I think there's a case to be made to let the function run non-interactively without having to commit changes.

Thanks @MrFlick for his correct suggestion on how to fix this.