On Wed, 26 Nov 2008, Ted Mendum wrote:
Hello,
I would like have an automatic way to avoid installing packages that I cannot
use due to license restrictions.
For example, the conf.design package is limited to non-commercial use, and
since I work for a for-profit business, I cannot use it.
I found out about the license terms of conf.design by chance; I would like to
avoid any possibility of a mistake in the future.
Is there some clever combination of grep and install.packages that I could use
to limit my downloads to, say, GPL-only packages?
Something like:
txt <- readLines(url("http://cran.r-project.org/web/packages/ALS/index.html";))
aok <- regexpr("GPL",txt[grep("License",txt)+1])>0
will work on CRAN as it is formatted now. Maybe roll it up in a function,
say license.ok(), that returns the name of package if aok or print the
license and stop if not aok. Then install.packages(license.ok(pkg.name))
should do it. Of course, this does not handle dependencies. For that you
might want to parse with index.html with XML, follow the dependencies and
check them all out, first.
HTH,
Chuck
Thanks,
Ted
Ted Mendum | Senior Scientist
Warner Babcock Institute for Green Chemistry
66 Cummings Park, Woburn, MA 01801
p: 781-937-9000
f: 781-937-9001
[EMAIL PROTECTED]
www.warnerbabcock.com
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Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
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