[Rd] Handling of upper/lowercase in package names (PR#2816)
ligges at statistik.uni-dortmund.de
ligges at statistik.uni-dortmund.de
Tue Apr 22 19:44:20 MEST 2003
phgrosjean at sciviews.org wrote:
> Hi,
>
> This is (presumably?) a bug in R 1.7.0 under Windows. I have not tested it
> on other systems. Attachment of packages is case sensitive but not
> library(), resulting in multiple loadings of the same package if the library
> name is spelled differently. The following example loads the `tools'
> package, once as `tools' and once as `Tools'. This behavior is the same with
> all packages and it occurs also in R 1.6.2.
Two ways of fixing it, check in library() for .Platform$OS.type == "windows"
a) whether a package was attached by non-case sensitive spelling, e.g.:
match(tolower(pckname), tolower(search))
b) for correct (case sensitive) spelling of the package name, e.g. by
reading the DESCRIPTION file *before* attaching the package.
Each one way seems to be easy, but which is preferred R-Core?
a) won't break windows specific code, b) might do so, but is more
consistent.
Uwe Ligges
>
>>library(tools)
>>search()
>
> [1] ".GlobalEnv" "package:tools" "package:methods" "package:ctest"
> "package:mva"
> [6] "package:modreg" "package:nls" "package:ts" "Autoloads"
> "package:base"
>
>>library(Tools)
>
>
> Attaching package 'Tools':
>
>
> The following object(s) are masked from package:tools :
>
> .checkDemoIndex .checkVignetteIndex .installMD5sums
> .installPackageDescription .installPackageIndices buildVignettes
> checkAssignFuns checkDocArgs checkDocStyle checkFF checkMD5sums checkMethods
> checkTnF checkVignettes codoc md5sum pkgVignettes print.checkAssignFuns
> print.checkDemoIndex print.checkDocArgs print.checkDocStyle print.checkFF
> print.checkMethods print.checkTnF print.checkVignetteIndex
> print.checkVignettes print.codoc print.undoc Rdindex Rtangle RtangleSetup
> RtangleWritedoc RweaveLatex RweaveLatexOptions RweaveLatexSetup Stangle
> Sweave SweaveSyntaxLatex SweaveSyntaxNoweb SweaveSyntConv undoc
>
>
>>search()
>
> [1] ".GlobalEnv" "package:Tools" "package:tools" "package:methods"
> "package:ctest"
> [6] "package:mva" "package:modreg" "package:nls" "package:ts"
> "Autoloads"
> [11] "package:base"
>
>
> Version:
> platform = i386-pc-mingw32
> arch = i386
> os = mingw32
> system = i386, mingw32
> status =
> major = 1
> minor = 7.0
> year = 2003
> month = 04
> day = 16
> language = R
>
> Windows XP Professional (build 2600) Service Pack 0.0
>
> Search Path:
> .GlobalEnv, package:Tools, package:tools, package:methods, package:ctest,
> package:mva, package:modreg, package:nls, package:ts, Autoloads,
> package:base
>
> Best,
>
> Philippe Grosjean
>
> ...........]<(({?<...............<?}))><...............................
> ) ) ) ) )
> ( ( ( ( ( Dr. Philippe Grosjean
> ) ) ) ) )
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> ) ) ) ) ) Station Zoologique
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> ( ( ( ( (
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> ( ( ( ( (
> ) ) ) ) ) e-mail: phgrosjean at sciviews.org
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> ) ) ) ) )
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