[Scons-users] emitter create dependency cycle

[William Deegan]

Phil,

Don't have Dir's in your target's or Sources. Just have files.

-Bill
On Sep 4, 2013, at 9:17 PM, Philipp Kraus <philipp.kraus at tu-clausthal.de> wrote:


> Hi Bill,

> 

> do you know some workaround / fix to solve this problem at the moment?

> 

> 

> Phil

> 

> 

> 

> Am 05.09.2013 um 00:33 schrieb Bill Deegan <bill at baddogconsulting.com>:

> 

>> Phil,

>> 

>> The problem you're running into (I think) is that SCons implicitly adds a dependency to a directory for each file in it.

>> The net is you need to deal with files and not directories or you will run into this issue.

>> 

>> I do agree however that we need a way to deal with directories as an object and not just a container with the implicit dependencies as a source and as a target.

>> One thing to consider is whether such and object should always be considered out of date if any file in the directory (and possibility in it's sub-directories recursively) has changed.

>> 

>> -Bill

>> 

>> 

>> On Wed, Sep 4, 2013 at 6:19 AM, Philipp Kraus <philipp.kraus at flashpixx.de> wrote:

>> On 2013-09-04 13:05:54 +0000, Gary Oberbrunner said:

>> 

>> 

>> 

>> 

>> 

>> 

>> 

>> 

>> 

>> On Wed, Sep 4, 2013 at 9:01 AM, Philipp Kraus <philipp.kraus at flashpixx.de> wrote:

>> 

>> On 2013-09-04 12:51:50 +0000, Gary Oberbrunner said:

>> 

>> ...

>> 

>> Can you use Ignore() to make the dir ignore the new files you're creating?

>> 

>> 

>> 

>> http://www.scons.org/doc/2.3.0/HTML/scons-user.html#AEN1275

>> 

>> Hi Gary,

>> 

>> IMHO I can use ignore, because only the targets are needed, but how can I use ignore in my builder script - not in my build (SConstruct) script?

>> 

>> I need the package call, is it SCons.Ignore, isn't it?

>> 

>> 

>> 

>> I usually do

>> 

>>  from SCons.Script import *

>> 

>> then you can write things in your external script the same as in SConscript.  

>> 

>> 

>> 

>> http://www.scons.org/doc/2.3.0/HTML/scons-user.html#AEN3822

>> 

>> 

>> 

>> I get always the dependy cycle. My emitter shows:

>> 

>> 

>> 

>> def __GitFileListEmitter( target, source, env ) :

>> 

>>     cmd    = env.subst(env["mycommand"], source=source)

>> 

>>     handle = subprocess.Popen( cmd, shell=True, stdout=subprocess.PIPE )

>> 

>>     target = handle.stdout.readlines()

>> 

>>     handle.communicate()

>> 

>>     if handle.returncode <> 0 :

>> 

>>         raise SCons.Errors.StopError("error [%s]" % (cmd, source[0]) )

>> 

>> 

>> 

>>     target = list(set( [os.path.join(source[0].abspath, i.strip()) for i in target] ))

>> 

>>     SCons.Script.Ignore(target, source)

>> 

>>     return target, source

>> 

>> 

>> 

>> For my test build with Lua Bridge shows a cycle:

>> 

>> 

>> 

>>   library/build/lua/bridge/README.md -> library/build/lua/bridge/Source/LuaBridge/detail/Constructor.h -> library/build/lua/bridge/Source/LuaBridge/detail -> library/build/lua/bridge/Source/LuaBridge -> library/build/lua/bridge/Source -> library/build/lua/bridge/Manual.html -> library/build/lua/bridge/index.html -> library/build/lua/bridge/README.md

>> 

>> 

>> 

>> If I remove source[0].abspath everythings fine, but the resulting files are incorrect (path is incorrect)

>> 

>> 

>> 

>> The Ignore call should IMHO ignore any connection between each target and source, but this seems to be a cycle between the targets. Each target has got a unique path, but all targets in the "source" directory. source is a single Dir object and target should be only a list of files. 

>> 

>> 

>> 

>> Thanks a lot

>> 

>> 

>> 

>> Phil

>> 

>> 

>> _______________________________________________

>> Scons-users mailing list

>> Scons-users at scons.org

>> http://four.pairlist.net/mailman/listinfo/scons-users

>> 

>> 

>> _______________________________________________

>> Scons-users mailing list

>> Scons-users at scons.org

>> http://four.pairlist.net/mailman/listinfo/scons-users

> 

> 

> _______________________________________________

> Scons-users mailing list

> Scons-users at scons.org

> http://four.pairlist.net/mailman/listinfo/scons-users


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://four.pairlist.net/pipermail/scons-users/attachments/20130905/50b48308/attachment.htm