(address . bug-guix@gnu.org)
fb88c9153595872f5e3697534bebe91506f4a0f8.camel@telenet.be
Today I started R (from Emacs). I needed mefa::rep.data.frame,
so I ran "guix install r-mefa -p ../prof" (actually guix package
-p ../prof -m ../manifest.scm, but that shouldn't matter for
the purposes of the bug report)
(r-mefa is not in the guix repo yet)
Now it is installed, I typed in the R prompt:
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> mefa::rep.data.frame
Error in loadNamespace(name) : there is no package called ‘mefa’
The solution is to exit the R prompt and restart.
Can we do better?
It appears the search path is set with .libPaths:
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> .libPaths
function (new)
{
if (!missing(new)) {
new <- Sys.glob(path.expand(new))
paths <- c(new, .Library.site, .Library)
paths <- paths[dir.exists(paths)]
.lib.loc <<- unique(normalizePath(paths, "/"))
}
else .lib.loc
}
<bytecode: 0xe39110>
<environment: 0xe32a48>
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> .libPaths()
[1] "/gnu/store/5cgx6pkhr300v706sv46gx9ypnwanngw-profile/site-library"
[2] "/gnu/store/6laxfxgjxnisi5fzhvqv82wjrgs7q0md-r-minimal-4.0.4/lib/R/library"
It seems like the symbolic link of ../prof is dereferenced to
/gnu/store/5cgx6pkhr300v706sv46gx9ypnwanngw-profile.
Promising is the documentation (? base::normalizePath) of base::normalizePath:
[...]
Where the Unix-alike platform supports it attempts to turn paths
into absolute paths in their canonical form (no ‘./’, ‘../’ nor
**symbolic links**). [...] (emphasis mine)
Maybe we make a copy of normalizePath (base:::guix_normalizeLibraryPath?) doing
the same as base::normalizePath but without dereferencing symbolic links,
and adjust .libPaths to use our variant base:::guix_normalizeLibraryPath instead
of normalizePath?
Greetings,
Maxime.
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