[Scons-users] download builder - tips

[Bill Deegan]

Phil,

I'm asking for a minimal system to reproduce the problem.
I don't want to download and debug your entire build.

You should be able to reproduce it with just a few files.

-Bill


On Sat, Apr 6, 2013 at 4:04 PM, Philipp Kraus <philipp.kraus at flashpixx.de>wrote:


>

> Am 07.04.2013 um 00:19 schrieb William Deegan:

>

> Philk

> On Apr 6, 2013, at 2:43 PM, Philipp Kraus <philipp.kraus at flashpixx.de>

> wrote:

>

> On 2013-04-06 02:41:22 +0200, Philipp Kraus said:

>

>

> thanks to Dirk and Bill for some nice email. I would like to replace my

> "dirty hacked Scons script" to a little more general code structure and

> would like to send them into the Scons community.

>

> I'm primary writing C/C++ code and uses Scons on OSX, Linux, Windows (MSVC

> & MinGW) for the building process.

>

> Often there exists on my C/C++ project the problem, that the project uses

> a lot of different libraries eg LAPack, Boost, Dune-FEM .... and these libs

> must be compiled for the project, so I use Scons for

>

> this building process most with a lot of env.Command code and some hacked

> builders. With a little time, I have forked out my first "hacked builder"

> to a more "Scons-Way-Builder".

>

> It is a little short builder, which downloads any URL data into a file. I

> have pushed the builder in my repo (

> https://github.com/flashpixx/Storage/blob/master/Scons/site_scons/site_tools/URLDownload.py)

>

> and a test Sconstruct under

> https://github.com/flashpixx/Storage/blob/master/Scons/SConstruct

>

> This builder replaces the target on default with the filename of the URL,

> the env setting URLDOWNLOAD_USEURLFILENAME (true | false) can be enabled /

> disabled this target replacing

>

> The next forked builders will be an Unpacking builder with flexible tool

> use (eg 7-Zip under Windows, tar / gzip / bzip under *nix) and a external

> builder for compiling extracted sources with cmake, MSVC ...

>

>

> I need a little help, because I get on my builders a cyclic dependency on

> cleaning or on the second run. If I have got a "clean" directory,

> everything works fine, the download builder creates

>

> the downloaded file and my unpack builder (

> https://github.com/flashpixx/Storage/blob/master/Scons/site_scons/site_tools/Unpack.py) is run and creates the correct extracting file list.

>

> If I run after the first run, without cleaning the builder script again, I

> get an error of the unpack builder that there exists a cyclic depency, an

> equal error is shown up, if I run "scons -c".

>

>

> If I replace in the Unpack.py the line 280 (     return target, source )

> to  'return "test", source' the error does not occure, so imho the problem

> exists in the emitter. The unpack builder returns a list of files &

> directories in an archive and the download builder get the file. So I hope,

> that I can download, extract and compile the sources in one short step.

> (The unpack builder works at the moment with *nix systems, Windows calls

> are not implementated yet)

>

>

> Can you paste the output you're getting and any more information?

> Also what would be great is either a simple SConstruct which demonstrates

> the issue, or a zip file with minimal amount of files/logic which

> demonstrates the issue.

>

> The more info, the easier it is to help you!

>

>

> I have post the links to all files, you can download the full code with an

> example SConstruct: https://github.com/flashpixx/Storage/tree/master/Scons

>

>

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