[Scons-users] emitter create dependency cycle

[Philipp Kraus]

The command shows:

target:['/fullpath/library/build/lua/bridge/Manual.html', 
'/fullpath/library/build/lua/bridge/.gitignore', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/CFunctions.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/RefCountedPtr.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/LuaException.h', 
'/fullpath/library/build/lua/bridge/index.html', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/Iterator.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/FuncTraits.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/TypeList.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/LuaHelpers.h', 
'/fullpath/library/build/lua/bridge/Doxyfile', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/TypeTraits.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/Userdata.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/ClassInfo.h', 
'/fullpath/library/build/lua/bridge/.gitattributes', 
'/fullpath/library/build/lua/bridge/CHANGES', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/dump.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/LuaBridge.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/Stack.h', 
'/fullpath/library/build/lua/bridge/README.md', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/Namespace.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/RefCountedObject.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/LuaRef.h', 
'/fullpath/library/build/lua/bridge/Source/LuaBridge/detail/Constructor.h'] 


source:[<SCons.Node.FS.Dir object at 0x10f85ad10>]

Thanks

Phil

On 2013-09-06 18:11:15 +0000, William Deegan said:


> Phil,

> 

> Stil a print here:

>     SCons.Script.Ignore(target, source)

>     print "target:%s source:%s"%(target,source)

>     return target, source

> 

> And paste the output.

> Also what's the command you're running and capturing the output?

> 

> -Bill

> On Sep 6, 2013, at 1:50 AM, Philipp Kraus <philipp.kraus at flashpixx.de> wrote:

> Hi Bill,

> 

> this seems to be not correct, because my emitter results only files 

> (with a full path), the target_factory is also set to files only. The 

> problem seems to be the full file path, but I can not remove the path, 

> because in the build(er) call I need this full path. Can you be more 

> specific for a workaround?

> 

> Thanks

> 

> Phil

> 

> 

> 

> On 2013-09-05 20:06:04 +0000, William Deegan said:

> 

> 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

> 

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