[Osgeo4w-trac] [osgeo4w] #578: R detection fails, preventing QGIS.bat from launching desktop app

[OSGeo4W]

#578: R detection fails, preventing QGIS.bat from launching desktop app
---------------------+---------------------------
Reporter:  belg4mit  |      Owner:  osgeo4w-dev@…
    Type:  defect    |     Status:  new
Priority:  major     |  Component:  Package
 Version:            |   Keywords:
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 etc\ini\batchfiles.bat emits the follow uncaught error, causing qgis.bat
 and other wrappers to bail


   C:\PROGRA~1\QGIS2~1.18>IF EXIST "C:\Program Files\R\"
 C:\PROGRA~1\QGIS2~1.18\apps\batchfiles\R path

   \R\R-2.15.0 was unexpected at this time.

 Swapping the order of these two clauses at ''':: 4a''' in etc\ini\R.bat
 from the current order (below) allows things to work:

   if not defined R_HOME for /f "tokens=2*" %%a in (
     'reg query hklm\software\wow6432Node\r-core\r /v !InstallPath 2!^>NUL
 !^| findstr !InstallPath'
     ) do set R_HOME=%%~b

   if not defined R_HOME for /f "tokens=2*" %%a in (
     'reg query hklm\software\R-core\R /v !InstallPath 2!^>NUL !^| findstr
 !InstallPath'
     ) do set R_HOME=%%~b

 I don't know why the first one fails, but since it seems to detect older
 versions of R, it should probably be the fallback and not the first choice
 anyhow.

   C:\Program Files\QGIS 3.2>reg query hklm\software\wow6432Node\r-core\r
 /v !InstallPath

   HKEY_LOCAL_MACHINE\software\wow6432Node\r-core\r
     !InstallPath    REG_SZ    C:\Program Files (x86)\R\R-2.15.0

   C:\Program Files\QGIS 3.2>reg query hklm\software\R-core\R /v
 !InstallPath

   HKEY_LOCAL_MACHINE\software\R-core\R
     !InstallPath    REG_SZ    C:\Program Files\R\R-3.3.1

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Ticket URL: <https://trac.osgeo.org/osgeo4w/ticket/578>
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