Description

Cores info files are useless for multi systems cores.
By example there is no reliable way to distinguish system_id, supported_extensions for each system.

Expected behavior

Able to parse per system properties for system id, supported extensions.

Actual behavior

For example in the bluemsx_libretro.info:
Useless entries like:

systemname = "MSX/SVI/ColecoVision/SG-1000"
systemid = "msx"
database = "Microsoft - MSX|Microsoft - MSX2|Coleco - ColecoVision|Sega - SG-1000"
supported_extensions = "rom|ri|mx1|mx2|col|dsk|cas|sg|sc|m3u"

• RetroArch: [v1.8.1 / bfdc8e6]

Environment information

• OS: Linux / Flatpak x86_64

Ideas:

For such multi systems cores, we could decide:

• system separator like |
• system multi value separator like ;
• exact same number of entries for properties that matter (systemid and systemname by examples)
• extension sorted by order of declared systems
• system section unknown should be set empty (not skipped)

So for the reported properties, they could become instead:

systemname = "MSX|MSX2|SVI|ColecoVision|SG-1000"
systemid = "msx|msx2|svi|colecovision|sg_1000"
database = "Microsoft - MSX|Microsoft - MSX2|SVI - SVI|Coleco - ColecoVision|Sega - SG-1000"
supported_extensions = "mx1|mx2|dsk;cas|col|sg"