CMake: add NSIS generator settings

[Mixaill]

• Add icon to VCMI_client and VCMI_launcher for cmake/windows build.
• Add ability to build NSIS .exe installers.

How-to build:

• .exe - cpack -G NSIS
• .zip - cpack -G ZIP

Output format:
vcmi-x.xx-win32.(exe|zip)

Example:
vcmi-0.96-win32.exe

[IvanSavenko]

• Stripping files - probably not needed. If we want to have debug info we can set build type to RelWithDebInfo and if we want "clear" release - then build type can be set to Release.
• Install directory - as of now VCMI must be installed in the same directory as H3. We need to either:
  • Detect H3 location from registry. Something like HKLM\Software\NWC\HoMM3\AppPath.
  • Or, at least install it into default location of H3 (I think that's something like Program Files\NWC\HoMM3)
  • Another option is to make H3 directory configurable via Launcher. See VCMIDirs::dataPaths().

[Mixaill]

There is problem. Different versions of HoMM3 (NWC/3DO, GOG.com, Buka) use different registry keys.

GOG.com (Probably 3DO too)

• HKEY_LOCAL_MACHINE\SOFTWARE\New World Computing\Heroes of Might and Magic® III\1.0

Buka

• HKEY_LOCAL_MACHINE\SOFTWARE\Buka\3DO\Heroes of Might and Magic III Complete Platinum\1.0

[alexvins]

I think vcmi should first look into data path in config if it is not set then pull registry and if nothing found may be try also vcmi installation path. If data was found, save path in config or complain and return otherwise.

[IvanSavenko]

@alexvins
Something like this would be useful BUT only as some way to detect proposed data path - for example when player starts Launcher and if data files are missing show dialog asking him to locate H3 files. Starting location in this dialog would be auto-detected one.

Using search like this is a good idea but player still must select preferred data - in case of multiple installs for example.

[Mixaill]

I think it is task for another pull request.

[IvanSavenko]

Yes. Then I'll update my first comment here:

• Stripping files - probably not needed. If we want to have debug info we can set build type to RelWithDebInfo and if we want "clear" release - then build type can be set to Release.
• Install directory - as it, installing VCMI with default settings will result in non-functional game. Comment like "Please select your H3 location" would be useful for now.

If you wish to keep both of these as it - I'm OK with that, just want to hear your opinion on these.

[Mixaill]

Stripping files - probably not needed. If we want to have debug info we can set build type to RelWithDebInfo and if we want "clear" release - then build type can be set to Release.

fixed

Install directory - as it, installing VCMI with default settings will result in non-functional game. Comment like "Please select your H3 location" would be useful for now.

Uh. This is non-trivial to do with CPack and NSIS. I think it's better to leave it as is

[IvanSavenko]

Ok, merged. Any volunteers to implement data directory selection for Launcher?

EDIT: created issue on Mantis, to keep this tracked: http://bugs.vcmi.eu/view.php?id=1845

[Mixaill]

Ok, merged. Any volunteers to implement data directory selection for Launcher?

I'm trying to do it.