chore: merge round 4 fixes (links)

Both branches extracted RetroBat's Flycast BiosPath: value_folders
already produces the record, so the dedicated extractor is dropped and
its test reads the generic one.

wiki/adding-a-platform.md

@@ -182,7 +182,14 @@ resolved. Three strategies exist:
 - **Omitted**: fallback to system ID intersection, `built_by` profiles excluded.
 
 Two lists say how each resolved emulator is laid out. `standalone_cores` names the
-ones the platform launches as standalone apps: their files go to `standalone_path`.
+ones the platform launches as standalone apps: their files go to `standalone_path`,
+under the folder the platform hands the emulator when its `launchers:` say so. A
+`links` or `passes_path` record of a whole directory that names one of the profile's
+`standalone_directories` gives that folder (`launchers.standalone_root`): RetroPie
+links Flycast's `~/.local/share/flycast` to `BIOS/dc`, EmuDeck the Flatpak's data
+directory to `bios/flycast/bios`, and ROCKNIX's patched data directory is followed
+through the link its start script makes. Two records giving two folders leave the
+profile's layout.
 `dual_mode_cores` names those it launches both ways (RetroPie packages `lr-hatari`
 and `hatari`): both layouts are packed. A profile without a standalone build keeps
 its libretro layout whatever the platform calls it.

wiki/profiling.md

@@ -493,6 +493,7 @@ reports the profile as uncheckable, and the CI job that runs
 | `built_by` | no | platforms that ship this build under its core name, compiled by them or installed from the project's own release (Recalbox's `mame0278`, the GSplus legacy build). On those platforms the name resolves to this profile, never through `all_libretro`: the buildbot does not publish it |
 | `bios_mode` | no | `agnostic` when the core takes any file of the right shape in its BIOS folder instead of a fixed name (PCSX2). Packs then carry every matching dump, and a `<bios>.bin` placeholder stands for them |
 | `bios_directory` | no | the folder an agnostic core scans, relative to the system directory (`pcsx2/bios/`). A scan never seeds from files outside it |
+| `standalone_directories` | no | what the standalone build resolves `standalone_path` against, as its code names it: a directory (`$XDG_DATA_HOME/flycast`), a setting (`Dreamcast.BiosPath`), an environment variable (`FLYCAST_BIOS_PATH`) or the function returning the directory (`find_user_data_dir`). A platform whose launcher links or passes a folder of its BIOS tree under one of them gets the standalone files in that folder |
 | `display_name` | no | full display name (e.g. "Sega - Mega Drive (BlastEm)") |
 | `logo` | no | image URL used on the emulator page |
 | `systems` | no | list of system IDs this core handles |

wiki/testing-guide.md

@@ -39,7 +39,7 @@ Every module in `tests/`, by the area it guards.
 |------|----------|---------|
 | Core regression suites | synthetic | `test_e2e`, `test_audit_regressions`, `test_tool_messages` |
 | File resolution and identity | synthetic + collection | `test_adler32_resolution`, `test_agnostic_scan`, `test_agnostic_scan_mode`, `test_agnostic_scope`, `test_agnostic_substitute`, `test_archive_choice`, `test_bios_companions`, `test_bundled_identity`, `test_casefold_cache`, `test_db_aliases`, `test_declared_names`, `test_derivations`, `test_directory_entries`, `test_extra_identity`, `test_foreign_tree`, `test_foreign_tree_names`, `test_frontend_digest`, `test_game_data_homonyms`, `test_hashing`, `test_identity`, `test_md5_pack_context`, `test_name_tiebreak`, `test_nec_filing`, `test_owner_resolution`, `test_path_suffix`, `test_resolution_evidence`, `test_sega_filing`, `test_shipped_content`, `test_twin_declarations`, `test_validated_choice`, `test_variant_choice`, `test_variant_identity`, `test_zipped_member` |
-| Verification, cross-reference and profile checks | synthetic + profiles | `test_crypto_aes`, `test_crypto_unique_data`, `test_crypto_verify`, `test_case_insensitive_platforms`, `test_checks_have_values`, `test_core_file_fills_declaration`, `test_core_size_refusal`, `test_cross_reference_sources`, `test_file_consumers`, `test_fileless_audit`, `test_gap_settlement`, `test_hidden_extras`, `test_launcher_aliases`, `test_launcher_layer`, `test_native_mode`, `test_no_case_collisions`, `test_path_conflict_status`, `test_path_null_copies`, `test_profile_checks`, `test_profile_repositories`, `test_romm_hash_rule`, `test_shared_groups`, `test_standalone_mode`, `test_undeclared_dedup`, `test_unplaced_extras`, `test_validation_scope`, `test_verify_all_dir`, `test_verify_emulator_evidence`, `test_verify_listing`, `test_verify_pack_choice`, `test_verify_release_asset` |
+| Verification, cross-reference and profile checks | synthetic + profiles | `test_case_insensitive_platforms`, `test_checks_have_values`, `test_core_file_fills_declaration`, `test_core_size_refusal`, `test_cross_reference_sources`, `test_crypto_aes`, `test_crypto_unique_data`, `test_crypto_verify`, `test_file_consumers`, `test_fileless_audit`, `test_flycast_layout`, `test_gap_settlement`, `test_hidden_extras`, `test_launcher_aliases`, `test_launcher_layer`, `test_native_mode`, `test_no_case_collisions`, `test_path_conflict_status`, `test_path_null_copies`, `test_profile_checks`, `test_profile_repositories`, `test_romm_hash_rule`, `test_shared_groups`, `test_standalone_links`, `test_standalone_mode`, `test_undeclared_dedup`, `test_unplaced_extras`, `test_validation_scope`, `test_verify_all_dir`, `test_verify_emulator_evidence`, `test_verify_listing`, `test_verify_pack_choice`, `test_verify_release_asset` |
 | Packs and manifests | synthetic + real packs | `test_artifact_lock`, `test_atomic_artifacts`, `test_batocera_cores`, `test_deterministic_zip`, `test_emulator_pack_counts`, `test_finalize_pack_names`, `test_large_file_cache`, `test_libretro_layout`, `test_manifest_entry`, `test_pack_conformance_dirs`, `test_pack_core_extras`, `test_pack_counts`, `test_pack_destinations`, `test_pack_failures`, `test_pack_file_names`, `test_pack_grouping`, `test_pack_integrity`, `test_pack_member_identity`, `test_pack_readme`, `test_platform_inheritance`, `test_platform_keys`, `test_required_only_archives`, `test_required_only_twins`, `test_split_extras`, `test_split_names`, `test_split_pack`, `test_system_pack_extras`, `test_system_pack_parity`, `test_torrentzip`, `test_which_pack` |
 | Slots and regions | synthetic + profiles | `test_region`, `test_region_agnostic_scan`, `test_region_groups`, `test_region_held`, `test_region_platform_index`, `test_region_required_only`, `test_slot`, `test_slots`, `test_slots_shipped_file` |
 | Hardware targets and systems | synthetic + target files | `test_extract_targets`, `test_lakka_targets`, `test_libretro_slugs`, `test_system_ids`, `test_system_selection`, `test_target_names`, `test_target_scrapers`, `test_target_systems`, `test_target_verify` |