esp-idf/components/esptool_py/flasher_args.json.in

{
    "write_flash_args" : [ "--flash_mode", "${ESPFLASHMODE}",
                           "--flash_size", "${ESPFLASHSIZE}",
                           "--flash_freq", "${ESPFLASHFREQ}" ],
    "flash_settings" : {
        "flash_mode": "${ESPFLASHMODE}",
        "flash_size": "${ESPFLASHSIZE}",
        "flash_freq": "${ESPFLASHFREQ}"
    },
    "flash_files" : {
        "${BOOTLOADER_OFFSET}" : "bootloader/bootloader.bin",
        "${PARTITION_TABLE_OFFSET}" : "partition_table/partition-table.bin",
        "${PHY_PARTITION_OFFSET}" : "${PHY_PARTITION_BIN_FILE}",
        "${OTADATA_PARTITION_OFFSET}" : "${BLANK_OTADATA_FILE}",
        "${APP_PARTITION_OFFSET}" : "${IDF_PROJECT_BIN}"
    },
    "bootloader" :      { "offset" : "${BOOTLOADER_OFFSET}",
                          "file" : "bootloader/bootloader.bin" },
    "partition_table" : { "offset" : "${PARTITION_TABLE_OFFSET}",
                          "file" : "partition_table/partition-table.bin" },
    "otadata" : { "offset" : "${OTADATA_PARTITION_OFFSET}",
                  "file" : "${BLANK_OTADATA_FILE}" },
    "app" :             { "offset" : "${APP_PARTITION_OFFSET}",
                          "file" : "${IDF_PROJECT_BIN}" },
    "extra_esptool_args" : {
        "after"  : "${ESPTOOLPY_AFTER}",
        "before" : "${ESPTOOLPY_BEFORE}"
    }
}