feat: automate PortMaster save directory

docs/DEVELOPMENT.md

@@ -365,7 +365,10 @@ rm -rf -- "$test_root"
 ```
 
 Do not point `NETFISHING_DATA_DIR` at an arbitrary empty directory; it is an
-explicit portable-data override and must identify a valid data root.
+explicit portable-data override and must identify a valid data root. The
+PortMaster launcher is the narrow exception: it also sets
+`NETFISHING_CREATE_DATA_DIR=1`, allowing the game to initialize its known empty
+external save directory on first launch.
 
 Headless tests cannot prove visual alignment, mouse routing, shader appearance,
 controller feel, or resize behavior. Presentation changes require graphical

docs/PORTMASTER.md

@@ -38,8 +38,12 @@ directory. The templates in `scripts/portmaster/` are authoritative.
   mapping manager handle gameplay input.
 - The launcher calls `pm_platform_helper` for the game executable after
   starting GPTOKEYB and calls `pm_finish` after the game exits.
-- Persistent device data remains under `netfishing/conf/data`,
+- New installations automatically create player data under
-  `netfishing/conf/config`, and `netfishing/conf/cache`.
+  `ports/saves/netfishing/` and do not present the in-game folder picker.
+- Existing installations with a selected data root keep that location when
+  upgraded. Device-local data, configuration, and cache remain under
+  `netfishing/conf/data`, `netfishing/conf/config`, and
+  `netfishing/conf/cache`.
 - The archive must not contain `conf/`, saves, identities, logs, source files,
   `.git`, or `.godot` content.
 - Release downloads must publish only the canonical `netfishing.zip` for this
@@ -95,13 +99,15 @@ device directory and run:
 ```
 
 Before upgrading an existing installation, preserve
-`/mnt/mmc/ports/netfishing/conf/` on the device. After installation:
+`/mnt/mmc/ports/netfishing/conf/` and `/mnt/mmc/ports/saves/netfishing/` on the
+device. After installation:
 
 1. Confirm the installed executable and PCK hashes match the staged release.
 2. Confirm the installed launcher contains the canonical PortMaster header,
    starts GPTOKEYB with `netfishing.gptk`, and calls
    `pm_platform_helper` for the game executable.
-3. Confirm `conf/` was not replaced or removed.
+3. Confirm `conf/` and the external save directory were not replaced or
+   removed.
 4. Launch the installed port through the normal muOS menu.
 5. Verify the displayed game version and controller face-button mapping.
 6. Verify PortMaster's force-quit chord exits the game. This is Start+Select on

network/player_data_root.gd

@@ -12,6 +12,7 @@ const LAYOUT_VERSION := 1
 const MANIFEST_FILENAME := "netfishing_data.json"
 const README_FILENAME := "README.txt"
 const ENVIRONMENT_VARIABLE := "NETFISHING_DATA_DIR"
+const CREATE_ENVIRONMENT_VARIABLE := "NETFISHING_CREATE_DATA_DIR"
 const APPLICATION_ID := "netfishing"
 const APP_DATA_PORTABLE_PATH := "user://portable-data"
 const PATH_ALLOWED: StringName = &"allowed"
@@ -48,6 +49,15 @@ func resolve() -> bool:
 		var environment_path: String = OS.get_environment(ENVIRONMENT_VARIABLE)
 		if not environment_path.is_absolute_path():
 			return _fail("NETFISHING_DATA_DIR must be an absolute path.")
+		if (
+			OS.get_environment(CREATE_ENVIRONMENT_VARIABLE) == "1"
+			and not FileAccess.file_exists(
+				environment_path.path_join(MANIFEST_FILENAME)
+			)
+		):
+			var created: Dictionary = create_unbound_root(environment_path)
+			if not bool(created.get("ok", false)):
+				return false
 		return _activate_existing(environment_path, "", false)
 	var bootstrap: Dictionary = _read_json(BOOTSTRAP_PATH, 64 * 1024)
 	if bootstrap.is_empty() and FileAccess.file_exists(BOOTSTRAP_PATH + ".backup"):

scripts/build_portmaster.sh

@@ -181,7 +181,10 @@ Install the complete \`netfishing.zip\` archive with PortMaster or HarbourMaster
 The package requires an ARM64 device, two analog sticks, GLIBC 2.28 or newer,
 and the \`weston_pkg_0.2\` runtime.
 
-Save data and device-local configuration remain under \`netfishing/conf/\`.
+New installations store player data under \`ports/saves/netfishing/\` without
+opening a folder picker. Existing installations preserve their previously
+selected data root. Device-local configuration remains under
+\`netfishing/conf/\`.
 PortMaster launches use the light performance profile by default. Put the word
 \`normal\` in \`netfishing/conf/performance_profile\` to opt a capable device
 into the normal rendering profile. See \`netfishing/licenses/\` for bundled
@@ -223,6 +226,12 @@ grep -Fq 'NETFISHING_PERFORMANCE_PROFILE=light' \
   "${STAGE_ROOT}/NETfishing.sh"
 grep -Fq 'CONTROLLER_MAPPING_FILE="$CONFDIR/cache/controller_mapping.txt"' \
   "${STAGE_ROOT}/NETfishing.sh"
+grep -Fq 'SAVEDIR="$PORTS_ROOT/saves/netfishing"' \
+  "${STAGE_ROOT}/NETfishing.sh"
+grep -Fq '"NETFISHING_DATA_DIR=$SAVEDIR"' \
+  "${STAGE_ROOT}/NETfishing.sh"
+grep -Fq '"NETFISHING_CREATE_DATA_DIR=1"' \
+  "${STAGE_ROOT}/NETfishing.sh"
 grep -Fq 'printf '\''%s\n'\'' "$netfishing_controllerconfig" > "$CONTROLLER_MAPPING_FILE"' \
   "${STAGE_ROOT}/NETfishing.sh"
 grep -Fq '"$GAME_LAUNCHER"' "${STAGE_ROOT}/NETfishing.sh"

scripts/portmaster/NETfishing.sh

@@ -28,6 +28,9 @@ if [ ! -d "$GAMEDIR" ] && [ -d "/mnt/mmc/ports/netfishing" ]; then
 fi
 
 CONFDIR="$GAMEDIR/conf"
+PORTS_ROOT="${GAMEDIR%/netfishing}"
+SAVEDIR="$PORTS_ROOT/saves/netfishing"
+DATA_BOOTSTRAP_DIR="$CONFDIR/data/godot/app_userdata/NETFISHING"
 GAME_EXECUTABLE="$GAMEDIR/NETfishing.aarch64"
 GAME_LAUNCHER="$GAMEDIR/launch-netfishing.sh"
 GPTOKEYB_CONFIG="$GAMEDIR/netfishing.gptk"
@@ -42,6 +45,21 @@ fi
 mkdir -p "$CONFDIR/data" "$CONFDIR/config" "$CONFDIR/cache" "$WESTON_DIR"
 chmod +x "$GAME_EXECUTABLE"
 
+# New PortMaster installs use a predictable save directory beside the port
+# instead of presenting a folder picker on a small screen. Preserve an
+# established data-root choice when upgrading an existing installation.
+NETFISHING_DATA_ENVIRONMENT=()
+if [ -f "$SAVEDIR/netfishing_data.json" ] || {
+	[ ! -f "$DATA_BOOTSTRAP_DIR/data_root_bootstrap.json" ] &&
+	[ ! -f "$DATA_BOOTSTRAP_DIR/data_root_bootstrap.json.backup" ]
+}; then
+	mkdir -p "$SAVEDIR"
+	NETFISHING_DATA_ENVIRONMENT+=(
+		"NETFISHING_DATA_DIR=$SAVEDIR"
+		"NETFISHING_CREATE_DATA_DIR=1"
+	)
+fi
+
 > "$GAMEDIR/log.txt" && exec > >(tee "$GAMEDIR/log.txt") 2>&1
 
 if [ ! -f "$controlfolder/libs/${WESTON_RUNTIME}.squashfs" ]; then
@@ -134,6 +152,7 @@ $ESUDO env CRUSTY_RESOLUTION="${DISPLAY_WIDTH}x${DISPLAY_HEIGHT}" \
 	XDG_CONFIG_HOME="$CONFDIR/config" \
 	XDG_CACHE_HOME="$CONFDIR/cache" \
 	GODOT_SILENCE_ROOT_WARNING=1 \
+	"${NETFISHING_DATA_ENVIRONMENT[@]}" \
 	"${NETFISHING_GAME_ENVIRONMENT[@]}" \
 	"$GAME_LAUNCHER" \
 	"$CONTROLLER_MAPPING_FILE" \