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The documented specification is file:///d:/CRAN (as specified by RFC1738),
so this is working correctly.
The CHANGES file for 2.2.0 says:
o file:// URLs are now interpreted by download.file(),
download.packages() and url() in the same way as Mozilla-based
browsers. That is, the expected form is
file:///d:/path/to/file
with *three* slashes.
The point is that this is file:// + host + / + path/to/file, and host is
missing. That some versions of IE did not follow the standard is part of
the confusion here.
Note that ?available.packages does say
If a repository is
local, i.e., the URL starts with '"file:"', then the packages are
not downloaded but used directly. (Both '"file:"' and
'"file:///"' are allowed as prefixes to a file path, the latter
for an absolute file path.)
but 'file:' does not work with drives on Windows. That seems clearly to
rule out your usage.
On Fri, 10 Aug 2007, [EMAIL PROTECTED] wrote:
> Full_Name: Zivan Karaman
> Version: 2.5.1
> OS: Windows XP SP2
> Submission from: (NULL) (195.6.68.214)
>
>
> I think that I have encountered a bug in the function "available.packages"
> when
> using a local repository (file://
) on Windows.
>
> Version information:
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> status
> major 2
> minor 5.1
> year 2007
> month 06
> day 27
> svn rev 42083
> language R
> version.string R version 2.5.1 (2007-06-27)
>
> I have made a copy of the CRAN "/bin/windows/contrib/2.5" directory in the
> "D:/CRAN" folder on my machine.
>
> When I issue the command:
>
> available.packages(contrib.url("file://D:/CRAN"))
>
> I get the follwoing message:
> Error in gzfile(file, "r") : unable to open connection
> In addition: Warning message:
> cannot open compressed file ':/CRAN/bin/windows/contrib/2.5/PACKAGES' in:
> gzfile(file, "r")
>
> Looking at the source code, I've spotted the following lines which seem to
> cause
> trouble:
>
> if (.Platform$OS.type == "windows") {
> if (length(grep("[A-Za-z]:", tmpf)))
> tmpf <- substring(tmpf, 2)
> }
> Deleting them, the function works OK.
>
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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