[Re-sending, as my prior reply seems to have been problematic]
Hi,
While not a Windows user, I am on macOS, I might point out the R Windows
FAQ:
https://cran.r-project.org/bin/windows/base/rw-FAQ.html
which has a section on installation and customization. The relevant
reference for the current version of R (4.0.4) and the registry is here:
https://cran.r-project.org/bin/windows/base/rw-FAQ.html#Does-R-use-the-Registry_003f
Note, that saving the version information to the registry is an optional
part of the Windows install process. So, the presence of the registry
keys is not guaranteed.
There may be other relevant FAQ entries as well.
Regards,
Marc Schwartz
Sparapani, Rodney via ESS-help wrote on 3/10/21 1:28 PM:
Hi Gang:
Just to follow-up on my own post. I see that the Windows
Registry was discussed here in June of 2012 and March of
2013 (not 2004 which was my initial guess). But, whether
that even exists in modern Windows, IDK!
Here are the most relevant snippets…
On 06/15/2012 12:06 PM, Rodney Sparapani wrote:
Hi Paul:
Very nice thoughts. I'm just going to react to this part which seems
to be the most straightforward. I think you can call this from elisp.
But, the problem with this code is that it doesn't work, does it? Here's
what I get on Windows XP:
H:\>reg query hklm\software\R-core\R /v InstallPath
Error: The system was unable to find the specified registry key or value
H:\>reg query hklm\software\wow6432Node\r-core\r /v InstallPath
Error: The system was unable to find the specified registry key or value
What do you see?
Rodney
Oh, hang on. For me, I need
H:\>reg query hkcu\software\R-core\R /v InstallPath
! REG.EXE VERSION 3.0
HKEY_CURRENT_USER\software\R-core\R
InstallPath REG_SZ C:\Documents and Settings\rsparapa.MCWCORP\My
Documents\R\R-2.14.2
Ok, I think I see what is going on. You need to check each ROOTKEY
[ HKLM | HKCU | HKCR | HKU | HKCC ]
REG QUERY KeyName [/v ValueName | /ve] [/s]
KeyName [\Machine\]FullKey
Machine - Name of remote machine, omitting defaults to the current
machine
Only HKLM and HKU are available on remote machines
FullKey - in the form of ROOTKEY\SubKey name
ROOTKEY [ HKLM | HKCU | HKCR | HKU | HKCC ]
SubKey - The full name of a registry key under the selected
ROOTKEY
/v query for a specific registry key
ValueName - The name, under the selected Key, to query
if omitted, all values under the Key are queried
/ve query for the default value or empty value name <no name>
/s queries all subkeys and values
So, that code is incomplete. But, it could easily be adapted.
Rodney
On 03/28/2013 01:42 PM, Ross Boylan wrote:
BTW, the path is available in the registry at
HKEY_CURRENT_USER\Software\R-core\R\2.15.3 under InstallPath. There is
also an entry that uses \R32\ instead of \R\ in the registry tree.
Something like this has been suggested before (for example, see the
discussion from June 15th). There are a few problems here:
1) Generally, ESS developers are not cracker-jack Windows developers.
2) There have been MAJOR changes in Windows especially 7 and 8
which may (or may not) be at issue here; for example, multi-user
installs of ESS require omniscience.
3) it is not obvious to me why we need to search both the
HKLM and HKCU root keys (and perhaps others as well?!?).
So, I don't see this suggestion being acted on UNLESS there is
a Windows developer lurking out there who wants to work on ESS.
But, thanks anyways ;o)
--
Rodney Sparapani, Associate Professor of Biostatistics
Chair ISBA Section on Biostatistics and Pharmaceutical Statistics
Institute for Health and Equity, Division of Biostatistics
Medical College of Wisconsin, Milwaukee Campus
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