[Scons-users] emitter create dependency cycle
Bill Deegan
bill at baddogconsulting.com
Fri Sep 6 19:57:54 EDT 2013
Phil,
Clearly that's going to cause an issue.
Source = a
Targets = a/b a/c...
Scons will add the dependencey a depends on a/b a/c
You've specified that a/b depends on a.
In this case, isn't the real source the git repo?
-Bill
On Fri, Sep 6, 2013 at 3:42 PM, Philipp Kraus <philipp.kraus at flashpixx.de>wrote:
> **
>
> On 2013-09-06 21:18:28 +0000, Bill Deegan said:
>
>
> So your source is a directory? What directory?
>
>
> Yes, the directory is set to "/fullpath/library/build/lua/bridge"
>
>
>
> -Bill
>
>
>
> On Fri, Sep 6, 2013 at 1:45 PM, Philipp Kraus <philipp.kraus at flashpixx.de>wrote:
>
> 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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