box library unused attached module object linter

Checks that all attached module functions and data objects are used within the source file.

Usage

box_unused_att_mod_obj_linter()

Value

A custom linter function for use with r-lib/lintr.

Details

For use in rhino, see the Explanation: Rhino style guide to learn about the details.

Examples

if (FALSE) {
# will produce lints
code <- "
box::use(
  path/to/module[some_function, some_object],
)
"

lintr::lint(text = code, linters = box_unused_att_mod_obj_linter())

code <- "
box::use(
  path/to/module[alias_func = some_function, alias_obj = some_object],
)
"

lintr::lint(text = code, linters = box_unused_att_mod_obj_linter())

# okay
code <- "
box::use(
  path/to/module[some_function, some_object],
)

x <- sum(some_object)
some_function()
"

lintr::lint(text = code, linters = box_unused_att_mod_obj_linter())

code <- "
box::use(
  path/to/module[alias_func = some_function, alias_obj = some_object],
)

x <- sum(alias_obj)
alias_func()
"

lintr::lint(text = code, linters = box_unused_att_mod_obj_linter())
}