switch_to.sh: support noradio/qemu variants from base config, add --skip-reconfigure

diff --git a/tools/switch_to.sh b/tools/switch_to.sh
index b617da3..f3819f7 100755
--- a/tools/switch_to.sh
+++ b/tools/switch_to.sh
@@ -10,10 +10,39 @@ CI=""
 LOG=""
 DEBUG=""
 JTAG=""
+PSRAM=""
+UNAMALGAMATED=""
+WEBDISPLAY=""
+WEBDISPLAY_LARGER=""
+SKIP_RECONFIGURE=""
 
 function usage {
-    echo "THIS SCRIPT IS FOR JADE DEVELOPMENT ONLY";
-    echo "${0} jade|jade_v1_1|jade_v2 [--dev] [--noradio] [--ci] [--log|--log-cbor|--log-wifi] [--debug] [--jtag]";
+    if [ -n "$1" ]; then
+        echo "error: $1" >&2
+    fi
+    echo "${0} jade|jade_v1_1|jade_v2|qemu [OPTIONS]"
+    echo "WARNING: THIS SCRIPT IS FOR JADE DEVELOPMENT ONLY";
+    echo "JADE OPTIONS:"
+    echo "    --noradio    Disable Bluetooth support"
+    echo "    --log        Enable logging"
+    echo "    --log-cbor   Enable CBOR logging messages over the serial API"
+    echo "    --log-wifi   Enable text logging over WiFi"
+    echo "JADE V2 OPTIONS:"
+    echo "    --jtag       Enable JTAG debugging support"
+    echo "QEMU OPTIONS:"
+    echo "    --psram      Emulate a device with PSRAM support"
+    echo "    --webdisplay Provide a device display using a web browser"
+    echo "    --webdisplay-larger Provide a larger device display for --webdisplay"
+    echo "COMMON OPTIONS:"
+    echo "    --dev        Development (non-production) device (mandatory for qemu)"
+    echo "    --ci         Automatically execute the default UX action for CI testing"
+    echo "    --debug      Enable debug message handlers for testing"
+    echo "    --unamalgamated    Disable amalgamation of source files when building"
+    echo "    --skip-reconfigure Make config changes but do not reconfigure the build"
+    if [ -n "$1" ]; then
+        exit 1
+    fi
+    exit 0
 }
 
 function have_cmd()
@@ -23,60 +52,131 @@ function have_cmd()
 
 function set_config()
 {
-    sed -i "/^$1=/d" sdkconfig.defaults # Remove any old value
+    sed -i "/^$1=/d" sdkconfig.defaults # Remove old value: ignore if missing
     if [ -n "$2" ]; then
         echo "$1=$2" >>sdkconfig.defaults # Add the new value
     fi
 }
 
+function remove_config()
+{
+    # Remove config value: error if missing
+    REGEX="$1="
+    if ! grep -q "$REGEX" "sdkconfig.defaults"; then
+        echo "error: '$REGEX' not found in sdkconfig.defaults" >&2
+        exit 1
+    fi
+    sed -i "/^$REGEX/d" sdkconfig.defaults
+}
+
 while true; do
     case "$1" in
         jade)       CONFIG=$1; ARCH="esp32"; shift ;;
         jade_v1_1)  CONFIG=$1; ARCH="esp32"; shift ;;
         jade_v2)    CONFIG=$1; ARCH="esp32s3"; shift ;;
+        qemu)       CONFIG=$1; ARCH="esp32"; shift ;;
         --dev)      DEVELOPMENT="y"; shift ;;
-        --noradio)  NORADIO="_noradio"; shift ;;
+        --noradio)  NORADIO=1; shift ;;
         --ci)       CI="1"; shift ;;
         --log)      LOG=uart; shift ;;
         --log-cbor) LOG=cbor; shift ;;
         --log-wifi) LOG=wifi; shift ;;
         --debug)    DEBUG=1; shift ;;
         --jtag)     JTAG=1; shift ;;
-        -h | --help) usage;
-            exit 0 ;;
+        --psram)    PSRAM=1; shift ;;
+        --unamalgamated) UNAMALGAMATED=1; shift ;;
+        --webdisplay) WEBDISPLAY=1; shift ;;
+        --webdisplay-larger) WEBDISPLAY=1; WEBDISPLAY_LARGER=1; shift ;;
+        --skip-reconfigure) SKIP_RECONFIGURE=1; shift ;;
+        -h | --help) usage ;;
         "") break ;;
-        *) echo "error: unknown option ${1}"; usage; exit 1
+        *) usage "unknown option ${1}" ;;
     esac
 done
 
 if [ -z "${ARCH}" ]; then
-    usage
-    exit 1
+    usage "No target architecture selected"
+fi
+
+if [ "$CONFIG" = "qemu" ]; then
+    # QEMU
+    if [ -n "$NORADIO" ] || [ -n "$LOG" ] || [ -n "$DEBUG" ] || [ -n "$JTAG" ]; then
+        usage "--[noradio|log|log-cbor|log-wifi|debug|jtag] must not be given for qemu"
+    elif [ -n "$WEBDISPLAY" ] && [ -z "$PSRAM" ]; then
+        usage "--[webdisplay|webdisplay-larger] require --psram"
+    fi
+else
+    # Jade v1.0, 1.1, or 2.0
+    if [ -n "$PSRAM" ] || [ -n "$WEBDISPLAY" ]; then
+        usage "--[psram|webdisplay|webdisplay-larger] must not be given for non-qemu"
+    fi
 fi
 
 # TODO: standardize the naming convention for prod/dev configs
 if [ -n "${DEVELOPMENT}" ]; then
-    CONFIG_FILE="./configs/sdkconfig_dev_${CONFIG}${NORADIO}.defaults"
+    if [ "$CONFIG" = "qemu" ]; then
+        CONFIG_FILE="./configs/sdkconfig_${CONFIG}.defaults"
+    else
+        CONFIG_FILE="./configs/sdkconfig_dev_${CONFIG}.defaults"
+    fi
 else
-    CONFIG_FILE="./production/sdkconfig_${CONFIG}${NORADIO}_prod.defaults"
+    if [ "$CONFIG" = "qemu" ]; then
+        usage "--dev must be given for qemu"
+    fi
+    CONFIG_FILE="./production/sdkconfig_${CONFIG}_prod.defaults"
 fi
-if [ ! -f $CONFIG_FILE ]; then
-    echo "error: config file $CONFIG_FILE does not exist"
+if [ ! -f "$CONFIG_FILE" ]; then
+    echo "error: config file $CONFIG_FILE does not exist" >&2
     exit 1
 fi
 
 if ! have_cmd idf.py; then
-    echo "error: idf.py not found. Please install idf"
-    echo "(or run export.sh from the idf install) and try again"
+    echo "error: idf.py not found. Please install idf" >&2
+    echo "\(or run export.sh from the idf install\) and try again" >&2
     exit 1
 fi
 
 idf.py clean && \
-    rm -rf sdkconfig build && \
-    cp $CONFIG_FILE sdkconfig.defaults
+    rm -rf sdkconfig build
 
 echo "============================================"
 echo "using config file $CONFIG_FILE ..."
+cp "$CONFIG_FILE" sdkconfig.defaults
+if [ -n "$NORADIO" ]; then
+    echo "updating config file for noradio ..."
+    # remove settings (all)
+    remove_config CONFIG_BT_ENABLED
+    remove_config CONFIG_BT_NIMBLE_ATT_PREFERRED_MTU
+    remove_config CONFIG_BT_NIMBLE_ENABLED
+    remove_config CONFIG_BT_NIMBLE_GAP_DEVICE_NAME_MAX_LEN
+    remove_config CONFIG_BT_NIMBLE_HOST_TASK_STACK_SIZE
+    remove_config CONFIG_BT_NIMBLE_MAX_CONNECTIONS
+    remove_config CONFIG_BT_NIMBLE_MEM_ALLOC_MODE_EXTERNAL
+    remove_config CONFIG_BT_NIMBLE_NVS_PERSIST
+    remove_config CONFIG_BT_NIMBLE_ROLE_BROADCASTER
+    remove_config CONFIG_BT_NIMBLE_ROLE_CENTRAL
+    remove_config CONFIG_BT_NIMBLE_ROLE_OBSERVER
+    remove_config CONFIG_BT_NIMBLE_SM_LEGACY
+    remove_config CONFIG_BT_NIMBLE_SVC_GAP_DEVICE_NAME
+    # add settings (all)
+    set_config CONFIG_APP_NO_BLOBS y
+    set_config CONFIG_MBEDTLS_ECP_RESTARTABLE y
+    if [ "$CONFIG" = "jade" ] || [ "$CONFIG" = "jade_v1_1" ]; then
+        # remove settings (Jade v1.x)
+        remove_config CONFIG_BTDM_CTRL_BLE_MAX_CONN
+        remove_config CONFIG_BTDM_CTRL_FULL_SCAN_SUPPORTED
+        remove_config CONFIG_ESP_COEX_SW_COEXIST_ENABLE
+        # add settings (Jade v1.x)
+        set_config CONFIG_ESP_WIFI_IRAM_OPT n
+        set_config CONFIG_ESP_WIFI_RX_IRAM_OPT n
+    elif [ "$CONFIG" = "jade_v2" ]; then
+        # remove settings (Jade v2)
+        remove_config CONFIG_BT_NIMBLE_LOG_LEVEL_NONE
+    else
+        echo "error: unknown CONFIG: $CONFIG" >&2
+        exit 1
+    fi
+fi
 if [ -n "$CI" ]; then
     echo "updating config file for CI build ..."
     set_config CONFIG_DEBUG_UNATTENDED_CI y
@@ -95,13 +195,13 @@ elif [ "$LOG" = "wifi" ]; then
         DEFAULT_IP="${DEFAULT_IP}.100"
     fi
     set_config CONFIG_LOG_WIFI y
-    read -p "Enter WIFI SSID: " SSID
+    read -r -p "Enter WIFI SSID: " SSID
     set_config CONFIG_WIFI_SSID "\"$SSID\""
-    read -p "Enter WIFI Password: " PASSWORD
+    read -r -p "Enter WIFI Password: " PASSWORD
     set_config CONFIG_WIFI_PASSWORD "\"$PASSWORD\""
-    read -p "Enter socket server IP [${DEFAULT_IP}]: " IP
+    read -r -p "Enter socket server IP [${DEFAULT_IP}]: " IP
     set_config CONFIG_WIFI_LOGGER_IP "\"${IP:-${DEFAULT_IP}}\""
-    read -p "Enter socket server PORT [8888]: " PORT
+    read -r -p "Enter socket server PORT [8888]: " PORT
     set_config CONFIG_WIFI_LOGGER_PORT ${PORT:-8888}
     LOG="uart" # Enable UART logging below
 fi
@@ -115,7 +215,7 @@ if [ -n "$DEBUG" ]; then
 fi
 if [ -n "$JTAG" ]; then
     if [[ "$CONFIG" != *"jade_v2"* ]]; then
-        echo "error: JTAG can only be enabled for jade_v2 variants"
+        echo "error: JTAG can only be enabled for jade_v2 variants" >&2
         exit 1
     fi
     echo "updating config file for JTAG support ..."
@@ -123,8 +223,53 @@ if [ -n "$JTAG" ]; then
     set_config CONFIG_NEWLIB_STDIN_LINE_ENDING_LF y
     set_config CONFIG_NEWLIB_STDOUT_LINE_ENDING_LF y
 fi
+if [ -n "$PSRAM" ]; then
+    echo "updating config file for PSRAM support ..."
+    # remove settings
+    remove_config CONFIG_ESP_WIFI_STATIC_TX_BUFFER
+    remove_config CONFIG_ESP_WIFI_STATIC_TX_BUFFER_NUM
+    # add settings
+    set_config CONFIG_ESP_INT_WDT_TIMEOUT_MS 300
+    set_config CONFIG_SPIRAM y
+    set_config CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY y
+    set_config CONFIG_SPIRAM_BANKSWITCH_ENABLE n
+    set_config CONFIG_SPIRAM_MEMTEST n
+    if [ -n "$WEBDISPLAY" ]; then
+        echo "updating config file for webdisplay build ..."
+        # remove settings
+        remove_config CONFIG_COMPILER_OPTIMIZATION_CHECKS_SILENT
+        remove_config CONFIG_DEBUG_UNATTENDED_CI
+        remove_config CONFIG_ESP_ERR_TO_NAME_LOOKUP
+        remove_config CONFIG_ESP_INT_WDT_TIMEOUT_MS
+        remove_config CONFIG_ESP_SYSTEM_CHECK_INT_LEVEL_5
+        remove_config CONFIG_ESP_SYSTEM_PANIC_SILENT_REBOOT
+        remove_config CONFIG_LWIP_IPV6
+        remove_config CONFIG_LWIP_NETIF_LOOPBACK
+        remove_config CONFIG_UART_ISR_IN_IRAM
+        # add settings
+        set_config CONFIG_ESP_BROWNOUT_DET n
+        set_config CONFIG_ESP_INT_WDT n
+        set_config CONFIG_ESP_SYSTEM_PANIC_PRINT_HALT y
+        set_config CONFIG_HAS_CAMERA y
+        set_config CONFIG_HTTPD_MAX_REQ_HDR_LEN 4096
+        set_config CONFIG_HTTPD_WS_SUPPORT y
+    fi
+    if [ -n "$WEBDISPLAY_LARGER" ]; then
+        echo "updating config file for larger webdisplay build ..."
+        # add settings
+        set_config CONFIG_BOARD_TYPE_QEMU_LARGER y
+        # remove settings
+        remove_config CONFIG_BOARD_TYPE_QEMU
+    fi
+fi
+if [ -n "$UNAMALGAMATED" ]; then
+    echo "updating config file for unamalgamated build ..."
+    set_config CONFIG_AMALGAMATED_BUILD n
+fi
 echo "============================================"
 
-idf.py set-target $ARCH && \
-    idf.py reconfigure && \
-    echo "run idf.py all to build the firmware"
+if [ -z "$SKIP_RECONFIGURE" ]; then
+    idf.py set-target $ARCH && \
+        idf.py reconfigure && \
+        echo "run idf.py all to build the firmware"
+fi