feat: read ROCKNIX launchers from its packages

The scraper reads the start scripts and the configs each package installs at the tag the BIOS list is pinned to: configs that name a BIOS path, the yabasanshiro search, directories handed to DuckStation and the PCSX2 builds, and the ln -s commands that put bios/ where an emulator reads. A package that ships one config per device gets a device field only where the values differ, as melonDS does on AMD64.

scripts/scraper/rocknix_scraper.py

@@ -24,6 +24,8 @@ try:
         fetch_github_latest_version,
         requirement_entry,
     )
+    from .rocknix_launchers import extract_launchers
+    from .shell_launchers import RepoTree
 except ImportError:
     from base_scraper import (
         BaseScraper,
@@ -31,6 +33,8 @@ except ImportError:
         fetch_github_latest_version,
         requirement_entry,
     )
+    from rocknix_launchers import extract_launchers
+    from shell_launchers import RepoTree
 
 PLATFORM_NAME = "rocknix"
 
@@ -53,6 +57,14 @@ STANDALONE_TREE_URL = (
 )
 
 
+def launcher_revision(url: str) -> str:
+    """The tag or commit a rocknix-systems URL is read at."""
+    found = re.search(r"/ROCKNIX/distribution/([^/]+)/projects/", url)
+    if found is None:
+        raise ValueError(f"{url} names no ROCKNIX/distribution revision")
+    return found.group(1)
+
+
 def standalone_emulators(package_names: list[str]) -> list[str]:
     """The standalone emulators ROCKNIX packages, by the names profiles use.
 
@@ -274,6 +286,10 @@ class Scraper(BaseScraper):
             # emulator as a RetroArch core.
             "dual_mode_cores": dual_mode_emulators(standalone, self._fetch_emulators_mk()),
             "systems": systems,
+            # Read at the revision the BIOS list comes from.
+            "launchers": extract_launchers(
+                RepoTree.github(GITHUB_REPO, launcher_revision(self.url))
+            ),
         }