On 15 Mar 2015, at 23:21, John Fox <j...@mcmaster.ca> wrote: > Dear Ian, > > Thanks for this. Please see below: > >> -----Original Message----- >> From: Ian Gow [mailto:iand...@gmail.com] >> Sent: March-15-15 5:07 PM >> To: John Fox >> Cc: r-sig-mac@r-project.org >> Subject: Re: [R-SIG-Mac] checking for pdflatex >> >> I think it's driven by the PATH variable, which appears to differ for me >> between RStudio and R from Terminal on the one hand and R.app on the >> other. > > Yes, I understand that, though I don't understand why there's a difference > in the path.
This has been discussed on this forum before. In a nutshell: a (questionable) design decision from Apple over which R.app has no control! For info: http://tex.stackexchange.com/questions/208181/why-did-my-tex-related-gui-program-stop-working-in-mac-os-x-yosemite > >> >>> Sys.getenv("PATH") >> [1] "/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin" >>> Sys.which("pdflatex") >> pdflatex >> "" >> >> If I add >> >> Sys.setenv(PATH=paste(Sys.getenv("PATH"),"/opt/local/bin", sep=":")) >> >> to ~/.Rprofile then R.app finds pdflatex (from MacPorts in my case). >> >>> Sys.which("pdflatex") >> pdflatex >> "/opt/local/bin/pdflatex" >>> Sys.getenv("PATH") >> [1] "/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/local/bin" > > The problem for me is to determine whether pdflatex is installed *without* > knowing in advance where it's installed. I haven't described the purpose of > this, and, in the interest of brevity, won't for the time-being, but it may > also prove necessary to determine where pdflatex resides. I don’t think you can, although you can approximate this by setting the PATH to everywhere that pdflatex *might* be installed e.g.: Sys.setenv(PATH=paste(Sys.getenv('PATH'),"/opt/local/bin:/opt/local/sbin:/usr/texbin:/usr/local/bin: …. etc …. ",sep=':’)) Sys.which("pdflatex") I realise that this is not an ideal solution, so somebody may have a better one. You could also theoretically try parsing the .basrc / .profile files, but I’m not sure if this is recommended practice (i.e. the fact that these are not parsed automatically is supposed to be a security measure)??? Cheers, Matt > > Best, > John > >> >> >> On 15 Mar 2015, at 16:46, John Fox wrote: >> >>> Dear list members, >>> >>> I need to determine whether pdflatex is installed and have been doing >>> that via Sys.which("pdflatex"). This works when R is run in a terminal >>> window (or in RStudio): >>> >>>> Sys.which("pdflatex") >>> pdflatex >>> "/usr/texbin/pdflatex" >>> >>> but not from R.app: >>> >>>> Sys.which("pdflatex") >>> pdflatex >>> "" >>> >>> The session info is the same in both cases: >>> >>> -------------- snip ---------------- >>> >>>> sessionInfo() >>> R version 3.1.3 (2015-03-09) >>> Platform: x86_64-apple-darwin13.4.0 (64-bit) Running under: OS X >>> 10.10.2 (Yosemite) >>> >>> locale: >>> [1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF- >> 8 >>> >>> attached base packages: >>> [1] stats graphics grDevices utils datasets methods base >>> >>> -------------- snip ---------------- >>> >>> Why is the result different? Is there a better way to check for the >>> presence of pdflatex? >>> >>> Any help would be appreciated. >>> >>> Thanks, >>> John >>> >>> ------------------------------------------------ >>> John Fox, Professor >>> McMaster University >>> Hamilton, Ontario, Canada >>> http://socserv.mcmaster.ca/jfox/ >>> >>> _______________________________________________ >>> R-SIG-Mac mailing list >>> R-SIG-Mac@r-project.org >>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac > > > --- > This email has been checked for viruses by Avast antivirus software. > > _______________________________________________ > R-SIG-Mac mailing list > R-SIG-Mac@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-mac _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
