CRAN | R Documentation |
This function allows package developers to run tests themselves that should not run on CRAN or with "R CMD check –as-cran" because of compute time constraints with CRAN tests.
CRAN(CRAN_pattern, n_R_CHECK4CRAN)
CRAN_pattern |
a regular expressions to apply to the names of |
n_R_CHECK4CRAN |
Assume this is CRAN if at least n_R_CHECK4CRAN elements of
|
The "Writing R Extensions" manual says that "R CMD check" can be customized "by setting environment variables _R_CHECK_*_:, as described in" the Tools section of the "R Internals" manual.
'R CMD check' was tested with R 3.0.1 under Fedora 18 Linux and with Rtools 3.0 from April 16, 2013 under Windows 7. With the '–as-cran' option, 7 matches were found; without it, only 3 were found. These numbers were unaffected by the presence or absence of the '–timings' parameter. On this basis, the default value of n_R_CHECK4CRAN was set at 5.
1. x. <- Sys.getenv()
2. Fix CRAN_pattern
and n_R_CHECK4CRAN
if missing.
3. Let i be the indices of x. whose names match all the patterns in the vector x.
4. Assume this is CRAN if length(i) >= n_R_CHECK4CRAN
a logical scalar with attributes 'Sys.getenv' containing the results
of Sys.getenv()
and 'matches' contining i
per step 3
above.
Sys.getenv
# Look in fda-ex.R
# for the results from R CMD check
# Modified defaults were tested with environment variables
# _CRAN_pattern_ = 'A' and _n_R_CHECK4CRAN_ = '10'
# 'R CMD check' found 26 matches and CRAN() returned TRUE
cran <- CRAN()
str(cran)
gete <- attr(cran, 'Sys.getenv')
(ngete <- names(gete))
iget <- grep('^_', names(gete))
gete[iget]
# if (!CRAN()) {
# if (CRAN()) {
# stop("CRAN")
# } else {
# stop("NOT CRAN")
# }
# }
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