As discussed with Vincent I added 3 new features:
* LyX can now also be installed over an existing installation of the same LyX version if the users really wants this.
(A message box appears recommending not to do so for test releases and when there are problems with an existing installation of the same release.)
* LyX can now also be installed if the uninstaller executable of a former LyX was accidentally deleted.
(That this case was not handled was more a bug. Thanks Vicent for the pointer.)
* If a user set MiKTeX's automatic package installation to "No" the installer will.
(As discussed with Vincent, if a user has disabled this MiKTeX feature he most probably know the consequences. So respect his decision.)
respect that and not re-enable it.
I would be happy if anybody can spend a translation of the changed installer message.
- known problem: if LyX 2.0.x is installed and you install 2.1rc1, the .lyx file associations will not be updated but if LyX 2.1 is installed on a new PC the file associations work (work is in progress)
- it turned out that the hack to install a stripped-down Perl directly to MiKTEX is not only error-prone, requires admin permission but that it is also not safe because MiKTeX changes the folder structure from time to time. With the new solution Perl is installed directly for LyX like we do for ImageMagick, Python etc.
- for pdfcrop support there is a bug in pdfcriop that the requirement is hardcoded to Ghostscript 32bit - I contacted the pdfcrop author to fix this
- the installer does nw the job of replacing the magyar.ldf with the fixed version [http://wiki.lyx.org/Windows/Hungarian]
- install the Mongolian hyphenation pattern to MiKTeX
- update eLyXer
- update to new MiKTeX installer that fixes a bug with updating Packages
- don't ship cbgreek because it is so huge that its download would last 10 minutes or more
- the installer will now recognize an already installed 64bit MiKTeX
- the installer will still install 32bit MiKTeX for new installations because biblatex does not yet work with 64bit MiKTeX
LyX 2.0.x supports currently 147 LaTeX-packages. When LyX is first installed on a PC it took therefore about 10 minutes to install all supported and required packages. With the new installation method the installation speed only depends on the Internet speed and lasts with an average bandwidth now only 3.5 minutes.
(chkconfig.ltx asks LaTeX for each package separately and after each package installation the file name database of LaTeX was rebuild. And that cost a lot of time/CPU power)
