packages in Suggests should be used conditionally about biorad

[adokter]

This relates specifically to use of vol2birdR in examples, manual suggests following block around example code that uses a suggested package:

if(require("pkgname")){

}

[adokter]

Current packages in Suggests:

    aws.s3,
    ggspatial,
    knitr,
    prettymapr,
    rmarkdown,
    rosm,
    sf,
    testthat (>= 3.0.0),
    tidyselect,
    vdiffr,
    vol2birdR

[adokter]

Current functions that check for dependencies in Suggest, each of these need a if(require("pkgname")) in the examples

calculate_vp.R:  rlang::check_installed("vol2birdR", format_reason_vol2bird("to run `calculate_vp`."))
download_pvolfiles.R:  rlang::check_installed('aws.s3','to download pvolfiles.')
list_vpts_aloft.R:  rlang::check_installed("aws.s3",
map.R:  rlang::check_installed(c("ggspatial","prettymapr"),'to map ppi\'s')
read_pvolfile.R:    rlang::check_installed("vol2birdR", format_reason_vol2bird("to read `NEXRAD` files."))

To do:

• add rosm to the check_installed list in map.R
• add if(require("pkgname")) blocks to examples for calculate_vp(), download_pvolfiles(), list_vpts_aloft(), map() and read_pvolfile()
• move sf from Suggests to Imports, since the library is used in map(). sf is a very common library, so not worth adding a rlang::check_installed to map()

[adokter]

Check as follows with devtools:

devtools::check(env_vars = c("_R_CHECK_DEPENDS_ONLY_"="true"))