Ummm oops. Magic pixies? It assumed all of CRAN was installed? Maybe I'll write something that could go in /usr/lib/R/bin/RUN that checks and gets deps, installs the package, and runs package::main, which I think is what the OP wants - you could do R CMD RUN foo_1.0.0.tar.gz and away it goes...
B On Thu, Jan 31, 2019 at 3:56 PM David Lindelof <linde...@ieee.org> wrote: > > Would you care to share how your package installs its own dependencies? I > assume this is done during the call to `main()`? (Last time I checked, R CMD > INSTALL would not install a package's dependencies...) > > > On Thu, Jan 31, 2019 at 4:38 PM Barry Rowlingson > <b.rowling...@lancaster.ac.uk> wrote: >> >> >> >> On Thu, Jan 31, 2019 at 3:14 PM David Lindelof <linde...@ieee.org> wrote: >>> >>> >>> In summary, I'm convinced R would benefit from something similar to Java's >>> `Main-Class` header or Python's `__main__()` function. A new R CMD command >>> would take a package, install its dependencies, and run its "main" >>> function. >> >> >> >> I just created and built a very boilerplate R package called "runme". I can >> install its dependencies and run its "main" function with: >> >> $ R CMD INSTALL runme_0.0.0.9000.tar.gz >> $ R -e 'runme::main()' >> >> No new R CMDs needed. Now my choice of "main" is arbitrary, whereas with >> python and java and C the entrypoint is more tightly specified (__name__ == >> "__main__" in python, int main(..) in C and so on). But I don't think that's >> much of a problem. >> >> Does that not satisfy your requirements close enough? If you want it in one >> line then: >> >> R CMD INSTALL runme_0.0.0.9000.tar.gz && R -e 'runme::main()' >> >> will do the second if the first succeeds (Unix shells). >> >> You could write a script for $RHOME/bin/RUN which would be a two-liner and >> that could mandate the use of "main" as an entry point. But good luck >> getting anything into base R. >> >> Barry >> >> >> >>> >>> If we have this machinery available, we could even consider >>> reaching out to Spark (and other tech stacks) developers and make it easier >>> to develop R applications for those platforms. >>> >> >> ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
