gcn release: bundle the Swiss folder as a single ZIP

End-users dropping a GC homebrew onto an SD card always want the
same folder layout (Joypad Tester/{default.dol, opening.bnr}). The
release page was making them download two loose files and re-create
the structure by hand, with the .dol rename + folder name as the two
likely places to mess up. Bake the layout into the release artifact.

Release attachments are now:
- joypad_tester_v<ver>_gcn.zip -- extract to SD root, done. Contains
  Joypad Tester/default.dol (= joypad-tester-gamecube.dol, renamed)
  and Joypad Tester/opening.bnr.
- joypad_tester_v<ver>_wii.dol -- bare .dol for Homebrew Channel.
  No banner needed there; HBC uses its own meta.xml convention which
  we don't ship today.

Workflow's stage step builds the _stage/Joypad\ Tester/ dir, zips
it, drops the zip into _release/, and copies the Wii .dol alongside.
Drops the previously-attached opening.bnr (now inside the zip) and
the loose _gamecube.dol (now `default.dol` inside the zip).

README "Loading on hardware" reworked to match: GC instructions
shrink to "extract the zip to SD root" + a note about the Wii .dol
going through HBC.

Author: RobertDaleSmith

.github/workflows/release.yml

@@ -116,15 +116,26 @@ jobs:
         if: needs.parse.outputs.console == 'gcn'
         working-directory: ${{ needs.parse.outputs.console }}
         run: |
-          # Flash-cart-friendly artifact names:
-          # joypad_tester_v<ver>_<platform>.dol so a user dropping the
-          # download onto an SD card sees the project + version inline.
-          # opening.bnr keeps its canonical name (required by Swiss).
+          # Two release artifacts:
+          #   joypad_tester_v<ver>_gcn.zip -- pre-built Swiss folder
+          #     layout for GC SD-card loaders (FlippyDrive, GC Loader,
+          #     SD2SP2, etc.). Contains:
+          #       Joypad Tester/
+          #         default.dol  (renamed from joypad-tester-gamecube.dol;
+          #                       Swiss looks for this filename)
+          #         opening.bnr  (Swiss banner, required by name)
+          #   joypad_tester_v<ver>_wii.dol -- bare Wii build for the
+          #     Homebrew Channel.
           VERSION="${{ needs.parse.outputs.version }}"
           mkdir -p _release
-          [ -f joypad-tester-gamecube.dol ] && cp joypad-tester-gamecube.dol "_release/joypad_tester_v${VERSION}_gamecube.dol"
-          [ -f joypad-tester-wii.dol ]      && cp joypad-tester-wii.dol      "_release/joypad_tester_v${VERSION}_wii.dol"
-          [ -f opening.bnr ] && cp opening.bnr _release/
+          if [ -f joypad-tester-gamecube.dol ] && [ -f opening.bnr ]; then
+            mkdir -p "_stage/Joypad Tester"
+            cp joypad-tester-gamecube.dol "_stage/Joypad Tester/default.dol"
+            cp opening.bnr                "_stage/Joypad Tester/opening.bnr"
+            (cd _stage && zip -r "../_release/joypad_tester_v${VERSION}_gcn.zip" "Joypad Tester")
+            rm -rf _stage
+          fi
+          [ -f joypad-tester-wii.dol ] && cp joypad-tester-wii.dol "_release/joypad_tester_v${VERSION}_wii.dol"
           ls -la _release/
 
       - name: Stage release artifacts (GBA)

gcn/README.md

@@ -125,29 +125,44 @@ python3 buildtools/make_banner.py opening.bnr
 
 ## Loading on hardware
 
-Drop the `.dol` and `opening.bnr` into a folder on your Swiss SD (GC Loader,
-FlippyDrive, SD2SP2, etc.) with the `.dol` renamed to `default.dol`:
+### GameCube (Swiss / GC Loader / FlippyDrive / SD2SP2)
+
+Grab `joypad_tester_v<ver>_gcn.zip` from the release and extract it
+to your SD root. The archive already contains the Swiss-ready folder
+layout, so you'll end up with:
 
 ```
 SD root/
   Joypad Tester/
-    default.dol     # joypad_tester_v<ver>_gamecube.dol from the release
-                    # (or joypad-tester-gamecube.dol straight from a local build)
+    default.dol
     opening.bnr
 ```
 
-Swiss reads `opening.bnr` and shows the banner image + description in its
-file browser; selecting the folder runs `default.dol`.
+Swiss reads `opening.bnr` and shows the banner image + description in
+its file browser; selecting the folder runs `default.dol`.
+
+### Wii (Homebrew Channel)
+
+Grab `joypad_tester_v<ver>_wii.dol` and load it through the Homebrew
+Channel (either drop into `apps/JoypadTester/boot.dol` on your SD or
+send via WiiLoad).
 
 ## Releases
 
 Tagged as `gcn-v<semver>` from the repo root — see
 [`gcn/CHANGELOG.md`](CHANGELOG.md) for per-version notes. The release
-workflow attaches `joypad_tester_v<semver>_gamecube.dol`,
-`joypad_tester_v<semver>_wii.dol`, and `opening.bnr` to each GitHub
-Release. (In-tree build outputs use the libogc-target names
-`joypad-tester-gamecube.dol` / `joypad-tester-wii.dol`; release staging
-renames them for flash-cart drop-in legibility.)
+workflow attaches:
+
+- `joypad_tester_v<semver>_gcn.zip` — pre-built Swiss folder layout
+  (extract to SD root, boot via Swiss).
+- `joypad_tester_v<semver>_wii.dol` — bare Wii build for Homebrew
+  Channel.
+
+(In-tree build outputs are `joypad-tester-gamecube.dol`,
+`joypad-tester-wii.dol`, and `opening.bnr` — release staging renames
+the GC `.dol` to `default.dol`, bundles it with the banner, and zips
+the result; the Wii `.dol` gets a flash-cart-friendly name and ships
+loose.)
 
 ## Origin / credits
 

gcn/ppc/main.c

@@ -175,7 +175,7 @@ typedef enum {
 static const char *format_style(pad_style_t s) {
   switch (s) {
   case STYLE_N64:      return "N64     ";
-  case STYLE_GCN:      return "GCN     ";
+  case STYLE_GCN:      return "GCC     ";
   case STYLE_WAVEBIRD: return "WaveBird";
   case STYLE_BONGO:    return "DK Bongo";
   case STYLE_DANCEMAT: return "DanceMat";