showSrc | R Documentation |
The APT Package Management system uses a data-rich caching
structure. This accessor function displays the information for
a set of packages matching the given regular expression. The
output corresponds to apt-cache showsrc pkgname
.
showSrc(regexp = ".")
regexp |
A regular expression for the package name(s) with a default of all (".") |
Note that the package lookup uses regular expressions. If only a
single package is desired, append a single $
to terminate
the expression. Ie r-cran-rcpp$
will not
return results for r-cran-rcpparmadillo
and
r-cran-rcppeigen
.
A boolean is returned indicating whether or not the given regular expression could be matched to source packages – but the function is invoked ' for the side effect of displaying information.
Dirk Eddelbuettel
showSrc("^r-(base|doc)-")
showSrc("r-cran-rcpp") # also finds RcppEigen and RcppArmadillo
showSrc("r-cran-rcpp$") # just Rcpp
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