feat: map raspberry pi models to batocera boards

platforms/targets/_overrides.yml

@@ -42,6 +42,18 @@ batocera:
         - gliden64
         - glide64mk2
         - rice
+    # Boards are named by SoC; the Raspberry Pi models a user knows map here
+    # (Batocera's Config.in comments: "rpi2/rpi3", "rpi4 only", "rpi5 only").
+    bcm2835:
+      aliases: [rpi1, rpi-zero]
+    bcm2836:
+      aliases: [rpi2]
+    bcm2837:
+      aliases: [rpi3, rpi-zero2]
+    bcm2711:
+      aliases: [rpi4, rpi400, cm4]
+    bcm2712:
+      aliases: [rpi5, rpi500, cm5]
     x86_64:
       add_cores: [citron, demul, model2, xenia]
     zen3:

tests/test_target_names.py

@@ -29,6 +29,15 @@ class AliasesResolveToOneName(unittest.TestCase):
                     "nintendo-switch",
                 )
 
+    def test_raspberry_pi_models_reach_batocera_boards(self):
+        """`--target rpi4`, the example every --help gives, was refused on
+        Batocera: its boards are named by SoC and no alias pointed there."""
+        platforms = str(REPO_ROOT / "platforms")
+        for typed, board in (("rpi4", "bcm2711"), ("rpi5", "bcm2712"),
+                             ("rpi3", "bcm2837"), ("rpi-zero", "bcm2835")):
+            with self.subTest(typed=typed):
+                self.assertEqual(canonical_target_name(["batocera"], typed, platforms), board)
+
     def test_an_unknown_name_is_left_for_the_target_check(self):
         self.assertEqual(
             canonical_target_name(["retroarch"], "bogus", str(REPO_ROOT / "platforms")),