valid-name.md
In pkgdepends: Package Dependency Resolution and Downloads

is_valid_package_name

Code
  is_valid_package_name("foo")
Output
  [1] TRUE
Code
  is_valid_package_name("pkg")
Output
  [1] FALSE
  attr(,"reason")
  [1] "Package name forbidden by CRAN."
Code
  is_valid_package_name("fáf")
Output
  [1] FALSE
  attr(,"reason")
  [1] "It can only contain ASCII characters."
Code
  is_valid_package_name("foo-bar")
Output
  [1] FALSE
  attr(,"reason")
  [1] "It can only contain letters, numbers and dot."
Code
  is_valid_package_name("x")
Output
  [1] FALSE
  attr(,"reason")
  [1] "It must have at least two characters."
Code
  is_valid_package_name("1xyz")
Output
  [1] FALSE
  attr(,"reason")
  [1] "It must start with a letter."
Code
  is_valid_package_name("dotted.")
Output
  [1] FALSE
  attr(,"reason")
  [1] "It must not end with a dot."