GISRC environment variable using initGRASS

I am currently using the R package "rgrass7" (Version: 0.1-6) in order 
to command GRASS GIS (Windows7, OSGEO4W installation).

I use R in order to start a GRASS environment and to script my 
geoprocessing. Both is working fine. However, I have problems with 
storing and calling the GRASS gisenv variables. Every time when I call 
"initGRASS" a file called "junk" is created containing GRASS gisenv 
variables.

What the file is called is probably immaterial.
Looking at the source of the initGRASS function the section below 
puzzeled me somehow:

?59 ? Sys.setenv(GISRC = paste(Sys.getenv("HOME"), "\\.grassrc7",?
?60 ? ? sep = ""))
This is setting GISRC to a value
?61 ? if (file.exists(Sys.getenv("GISRC")) && !override)?
?62 ? ? stop("A GISRC file already exists; to override, set override=TRUE")
?63 ?Sys.setenv(GISRC = "junk")
This is setting it again in the working directory - I don't recall why - 
probably frustration years ago with Windows.
?64 ?cat("GISDBASE:", getwd(), "\n", file = Sys.getenv("GISRC"))
?65 ?cat("LOCATION_NAME: <UNKNOWN>", "\n", file = Sys.getenv("GISRC"),?
?66 ? ? append = TRUE)
?67 ?cat("MAPSET: <UNKNOWN>", "\n", file = Sys.getenv("GISRC"),?
?68 ? ? append = TRUE)
?69 ?gisrc <- ifelse(use_g.dirseps.exe, system(paste("g.dirseps.exe -g",?
?70 ? ? shQuote(Sys.getenv("GISRC"))), intern = TRUE), Sys.getenv("GISRC"))
?71 ? assign("addEXE", .addexe(), envir = .GRASS_CACHE)
? 72 ?Sys.setenv(GISRC = gisrc)

And this sets it again. It is set, otherwise GRASS wouldn't work; 
programmatically you'd have to use Sys.getenv("GISRC") to get the value. 
Please provide a use case where this matters, and consider moving this 
thread to the statsgrass list.

Hope this helps (doesn't clarify, but that's legacy Windows),

Roger
First, why is initGRASS using ".grassrc7" for storing the GISRC file??
InitGRASS is looking for the GISRC file under ".grassrc7" (line 59). However, in the?package documentation [1], the GISRC file is called ".gisrc". Moreover, the?GRASS documentation?says that the GISRC file is stored under "/.grass7/rc"

Second, what is the purpose of assigning "junk" to the GISRC environment variable??
GISRC is set to "junk" (line 63) and then the GISRC value ("junk") is assigned again back to system variable GISRC. Unless I misinterpreded the code, it does not make much sense to me. Shouldn't the enviroment varibales not be written (line 64 - 68) to ".grassrc7" rather than to "junk"?

I would appreciate any support or hints!

Regards,
Roger

[1] http://https//cran.r-project.org/web/packages/rgrass7/rgrass7.pdf
[2]?http://grass.osgeo.org/grass70/manuals/variables.html

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Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no
http://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en
http://depsy.org/person/434412

GISRC environment variable using initGRASS

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