The main change here is that we need to delete LyX2.3.exe and
tex2lyx2.3.exe from the install directory, so they are not left
there (from previous, versioned installs).
(cherry picked from commit 0cbde8a834)
- at the moment some files were in Unicode, some in CP1252 which can make unnecessary troubles
- remove an obsolete file
- update InstallerStructure.odg
- therefore the command line parameters changed
- all babel packages must be required
- use another default mirror that is hopefully not down 2hours every day
- use https in URLs
- remove unused code
- use variables if possible
- LyX 2.3.x won't support Windows Vista because Qt 5.9 does not and other third-party programs will follow soon
since a few months MiKTeX's package manager required the option "--admin" when calling it with admin privileges
- also register the .lyx21 file extension for LyX 2.3
- also update the LyXRC version number
- fixed typos and updated translation
- support for Krita
- updated support for Gimp
- updated backup detection for TeXLive (generic detection always works independently)
- safeguard for a variable issue
- also remove support metafile2eps because:
- it is outdated
- unnecessary third-party program since ImageMagick can do this too
- needs unnecessarily installation time
texindy requires some more Perl and unfortunately the path tho the perl.exe in Windows' PATh environment variable.
The new EnvVarUpdate.nsh contains a function to modify Windows environment variables easily.
- the installer now re-synchronize MiKTeX's package database before installing or updating LaTeX-packages. This assures that new packages and renamed packages can automatically be installed when they are missing (fixes bug #9370)
- update the list of LaTeX packages that have to be installed when LyX is installed via the bundle installer for the first time on a PC
- add support for Turkish spell-checking
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)
