KConfig: Expandable flag of config entries is not persistent

[Ingo Klöcker]

On Monday 08 October 2007, Nhuh Put wrote:
> > Von: Ingo Klöcker
> > Gesendet: Sonntag, 7. Oktober 2007 22:41
> > An: kde-core-devel at kde.org
> > Betreff: KConfig: Expandable flag of config entries is not
> > persistent
> >
> > Hi,
> >
> > KConfigGroup seems to have a serious problem with the persistence
> > of the flags of config entries. In the particular case I have
> > encountered the expandable flag ($e) of a path entry is lost if the
> > config is rewritten without explicitly rewritting the path entry
> > with writePathEntry(). This should be a very common use case
> > because it occurs whenever an application writes a path entry only
> > if it has changed (e.g. KMail writes the location of the mail
> > storage usually only a single time and thenceforth only reads the
> > entry).
> >
> > The attached patch for kconfigtest demonstrates the problem. After
> > adding another config entry and synching the config the expandable
> > flag of the path entry is gone so that the second read test of the
> > path fails because readPathEntry() returns the unexpanded value
> > $HOME/foo:
> >
> > FAIL!  : KConfigTest::testPath() Compared values are not the same
> >    Actual (sc3.readPathEntry( "homepath", QString() )): $HOME/foo
> >    Expected (HOMEPATH): /home/ingo/foo
> >    Loc:
> > [/home/ingo/svn/kde/trunk/KDE/kdelibs/kdecore/tests/kconfigtest.cpp
> >(277)]
>
> This should now also be fixed, at least the testcase doesn't fail
> anymore.

I'm sorry, but it is not fixed. I have now committed my testcase. With 
revision 723155 (which includes my amended kconfigtest) I'm getting

********* Start testing of KConfigTest *********
Config: Using QTest library 4.3.1, Qt 4.3.1
PASS   : KConfigTest::initTestCase()
PASS   : KConfigTest::testSimple()
FAIL!  : KConfigTest::testLists() 'sc3.hasKey( 
QString("stringListEmptyEntry") )' returned FALSE. ()
   Loc: 
[/home/ingo/svn/kde/trunk/KDE/kdelibs/kdecore/tests/kconfigtest.cpp(261)]
PASS   : KConfigTest::testPath()
FAIL!  : KConfigTest::testPersistenceOfExpandFlagForPath() Compared 
values are not the same
   Actual (sc3.readPathEntry( "homepath", QString() )): $HOME/foo
   Expected (HOMEPATH): /home/ingo/foo
   Loc: 
[/home/ingo/svn/kde/trunk/KDE/kdelibs/kdecore/tests/kconfigtest.cpp(287)]


FWIW, this bug makes it impossible to run KMail because after the second 
start your mail storage will not be found anymore (due to the missing 
expansion of $HOME).


Regards,
Ingo
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