std.path.buildPath

[Russel Winder via Digitalmars-d-learn]

On Sun, 2017-06-04 at 21:32 +0200, Jacob Carlborg via Digitalmars-d-
learn wrote:
> On 2017-06-04 19:05, Patrick Schluter wrote:
> 
> > buildPath("/usr/bin", "/usr/bin/gcc")
> > 
> > /usr/bin/usr/bin/gcc is obviously wrong.
> 
> Says who? It might be exactly what I want. The case that came up is 
> inside DStep. The user provides a set of files C header to be
> translated 
> to D modules. The user also provides a flag to indicate where to
> place 
> the resulting files. I wanted to be able to keep the existing
> directory 
> structure of the header files in the new target location. Example:

Says Guido et al. it seems, Python has in os.path and pathlib exactly
this behaviour.

> dstep -o result /usr/include/libxml2/libxml/*.h
> 
> The internals of DStep will do something like:
> 
> buildPath("result", "/usr/include/libxml2/libxml");
> 
> Which currently results in "/usr/include/libxml2/libxml". The end
> result 
> is that DStep will try to write a file to
> "/usr/include/libxml2/libxml", 
> which the user most likely will not have access to (without using
> sudo). 
> I expected the result of buildPath to be 
> "result/usr/include/libxml2/libxml".

Sadly Python tells us otherwise just as D does.

It is perhaps worth noting in passing that D path support seems very
like os.path and Python folk are giving that up in favour of pathlib.
Java/Kotlin/Groovy have also gone the same way. The implication is that
D needs better path support than it currently has to keep up with the
evolutions in other languages.

-- 
Russel.
=============================================================================
Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder at ekiga.net
41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel at winder.org.uk
London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder
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