[chronojump] Supply path on OSX to call Rscript

[Xavier de Blas <xaviblas src gnome org>]

commit 5e7f9365caa664ffa95274cc8bf77d84be086bc7
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Dec 25 09:10:44 2015 +0100

    Supply path on OSX to call Rscript

 src/encoderRProc.cs |   41 +++++++++++++++++++++++++----------------
 1 files changed, 25 insertions(+), 16 deletions(-)
---
diff --git a/src/encoderRProc.cs b/src/encoderRProc.cs
index 93f5a91..d37a705 100644
--- a/src/encoderRProc.cs
+++ b/src/encoderRProc.cs
@@ -156,6 +156,28 @@ public abstract class EncoderRProc
                return false;
        }
 
+       protected string pBinURL()
+       {
+               string pBin="Rscript";
+               if (UtilAll.IsWindows())
+               {
+                       //on Windows we need the \"str\" to call without problems in path with spaces
+                       pBin = "\"" + System.IO.Path.Combine(Util.GetPrefixDir(), "bin" + 
Path.DirectorySeparatorChar + "Rscript.exe") + "\"";
+               }
+               else if(UtilAll.GetOSEnum() == UtilAll.OperatingSystem.MACOSX)
+               {
+                       /*
+                        * The installer as from R 3.2.2 puts links to R and Rscript
+                        * in /usr/bin (Mavericks, Yosemite) or /usr/local/bin (El Capitan and later).
+                        * If these are missing, you can run directly the versions in 
/Library/Frameworks/R.framework/Resources/.
+                        * https://cran.r-project.org/doc/manuals/r-devel/R-admin.pdf
+                        */
+                       pBin = "/Library/Frameworks/R.framework/Resources/Rscript.exe";
+               }
+
+               LogB.Information("pBin:", pBin);
+               return pBin;
+       }
                
        protected virtual void writeOptionsFile()
        {
@@ -223,16 +245,9 @@ public class EncoderRProcCapture : EncoderRProc
                //If output file is not given, R will try to write in the running folder
                //in which we may haven't got permissions
 
-               string pBin="";
-               pinfo = new ProcessStartInfo();
-
-               pBin="Rscript";
-               if (UtilAll.IsWindows()) {
-                       //on Windows we need the \"str\" to call without problems in path with spaces
-                       pBin = "\"" + System.IO.Path.Combine(Util.GetPrefixDir(), "bin" + 
Path.DirectorySeparatorChar + "Rscript.exe") + "\"";
-                       LogB.Information("pBin:", pBin);
-               }
+               string pBin = pBinURL();
 
+               pinfo = new ProcessStartInfo();
 
                //on Windows we need the \"str\" to call without problems in path with spaces
                //pinfo.Arguments = "\"" + "passToR.R" + "\" " + optionsFile;
@@ -341,15 +356,9 @@ public class EncoderRProcAnalyze : EncoderRProc
                //If output file is not given, R will try to write in the running folder
                //in which we may haven't got permissions
        
-               string pBin="";
                pinfo = new ProcessStartInfo();
 
-               pBin="Rscript";
-               if (UtilAll.IsWindows()) {
-                       //on Windows we need the \"str\" to call without problems in path with spaces
-                       pBin = "\"" + System.IO.Path.Combine(Util.GetPrefixDir(), "bin" + 
Path.DirectorySeparatorChar + "Rscript.exe") + "\"";
-                       LogB.Information("pBin:", pBin);
-               }
+               string pBin = pBinURL();
                
                if (UtilAll.IsWindows()) {
                        //On win32 R understands backlash as an escape character and