Better package split for qt5-sql and sql plugins

[krab]

System

• xuname:
  Void 5.15.11-xanmod1_1 x86_64 GenuineIntel notuptodate rrFFF
• package:
  qt5-sql-5.15.3+20211001_1

I'm building a local package for qt5 software that uses qt5sql-sqlite plugin in it sources. So currently I have to specify all qt5-sql plugins like qt5-plugin-sqlite etc. in template file to make package. Because if you look at Qt5SqlConfig.cmake file, it uses GLOB CMake function:

    # In Qt 5.15 the glob pattern was relaxed to also catch plugins not literally named Plugin.
    # Define QT5_STRICT_PLUGIN_GLOB or ModuleName_STRICT_PLUGIN_GLOB to revert to old behavior.
    if (QT5_STRICT_PLUGIN_GLOB OR Qt5Sql_STRICT_PLUGIN_GLOB)
        file(GLOB pluginTargets "${CMAKE_CURRENT_LIST_DIR}/Qt5Sql_*Plugin.cmake")
    else()
        file(GLOB pluginTargets "${CMAKE_CURRENT_LIST_DIR}/Qt5Sql_*.cmake")
    endif()

So it's trying to find every single .so file from Qt5Sql_Q***DriverPlugin.cmake file. But they don't exist, they separated into packages like qt5-plugin-sqlite etc. and configuration fails with:

macro(_qt5_Sql_check_file_exists file)
    if(NOT EXISTS "${file}" )
        message(FATAL_ERROR "The imported target \"Qt5::Sql\" references the file
   \"${file}\"
but this file does not exist.  Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
   \"${CMAKE_CURRENT_LIST_FILE}\"
but not all the files it references.
")
    endif()
endmacro()

The solution I'm suggesting is:

• Move Qt5SqlConfig.cmake Qt5SqlConfigVersion.cmake from /usr/lib/cmake/Qt5Sql/ (qt5-sql package) into qt5-sql-devel package.
• Move all Qt5Sql_QMYSQLDriverPlugin.cmake Qt5Sql_QODBCDriverPlugin.cmake Qt5Sql_QPSQLDriverPlugin.cmake Qt5Sql_QSQLiteDriverPlugin.cmake Qt5Sql_QTDSDriverPlugin.cmake from qt5-sql package into qt5-plugin-*-devel subpackages for example: Qt5Sql_QSQLiteDriverPlugin.cmake file into qt5-plugin-sqlite-devel etc.

That way to build software, we can specify single qt5-plugin-sqlite-devel as makedepends and qt5-plugin-sqlite as depends and don't list all of qt5sql plugins in template.

[krab]

Also, /usr/include/qt5/QtSql folder can be moved into qt5-sql-devel package, it will make sense.

[github-actions]

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