tex2lyx inserts a reference to \extrasfrench before \usepackage{babel}

[jeanpierre.chretien@…]

If I create a french article, say test_guill_orig.lyx, lyx-1.4.0 exports:

\usepackage{babel}
\addto\extrasfrench{\providecommand{\og}{\leavevmode\flqq~}\providecommand{\fg}{\ifdim\lastskip>\z@\unskip\fi~\frqq}}

If I rename test_guill_orig.tex as test_guill_roundtrip.tex and run
tex2lyx on this file, a preamble is created in test_guill_roundtrip.lyx without
the \uspackage{babel} command [newlines removed]:

\begin_preamble
%% LyX 1.4.0 created this file. For more info, see ​http://www.lyx.org/.
%% Do not edit unless you really know what you are doing.
\makeatletter
\addto\extrasfrench{\providecommand{\og}{\leavevmode\flqq~}\providecommand{\fg}{\ifdim\lastskip>\z@\unskip\fi~\frqq}}
\makeatother
\end_preamble

View->DVI produces an "Undefined control error" on \extrasfrench, as
the \addto command appears now once before the \usepackage{babel} command in the
exported file:

\makeatletter

\addto\extrasfrench{\providecommand{\og}{\leavevmode\flqq~}\providecommand{\fg}{\ifdim\lastskip>\z@\unskip\fi~\frqq}}
\makeatother

\usepackage{babel}
\addto\extrasfrench{\providecommand{\og}{\leavevmode\flqq~}\providecommand{\fg}{\ifdim\lastskip>\z@\unskip\fi~\frqq}}
\makeatother

[lasgouttes]

would be fixed by omitting parts of preamble generated by LyX (#19)

[jeanpierre.chretien@…]

It's true as well for geometry: if the original lyx file used geomtry package,
it comes back with the inserted preamble so that any change in geometry
from the Document->Settings->Page layout is not taken into account, as it is
exported before the preamble.

The problem is not only with round trip I guess, should not
tex2lyx remove from the preamble the settings it can convert as
lyx commands ?

[lasgouttes]

This is true. I wrote something like that in #19, fell free to add comments.

[Uwe Stöhr]

This is fixedintrunk as we load since LyX 1.6 babel in the correct order. The
given testcase, attachment 1342, works.

That \extrasfrench will appear in the preamble, since it could be another
command than the one that is automatically inserted by LyX.

[Uwe Stöhr]

This is fixedintrunk as we load since LyX 1.6 babel in the correct order. The
given testcase, attachment 1342, works.

We changed in the meantime the babel loading order again, so that this case is
no longer fixed. I'll have a look at it when LyX 1.6 is released to have a
stable code base.

[Richard Heck]

Uwe, does this still exist in 2.0.0?

[Uwe Stöhr]

Seems to be fixed in the meantime, tested with LyX 2.0.2svn.