Optional serde build feature

It would be nice to have an optional cargo build feature to allow Device information and Event data to be easily serialized using serde.

If you're interested, I could do the work and put up a PR.

For example, an event for a USB device insertion, serialized to JSON, might look like this:

{
  "type": "add",
  "seqNum": 24130,
  "subsystem": "usb",
  "sysname": "1-1",
  "devtype": "usb_device",
  "device": {
    "devnum": 48414,
    "syspath": "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1",
    "devpath": "/devices/pci0000:00/0000:00:14.0/usb1/1-1",
    "devnode": "/dev/bus/usb/001/031",
    "subsystem": "usb",
    "sysname": "1-1",
    "sysnum": 1,
    "devtype": "usb_device",
    "driver": "usb",
    "attributes": {
      "authorized": "1",
      "avoid_reset_quirk": "0",
      "bConfigurationValue": "1",
      "bDeviceClass": "00",
      "bDeviceProtocol": "00",
      "bDeviceSubClass": "00",
      "bMaxPacketSize0": "8",
      "bMaxPower": "100mA",
      "bNumConfigurations": "1",
      "bNumInterfaces": " 1",
      "bcdDevice": "0600",
      "bmAttributes": "a0",
      "busnum": "1",
      "configuration": "",
      "descriptors": "\u0012\u0001",
      "dev": "189:30",
      "devnum": "31",
      "devpath": "1",
      "driver": "usb",
      "firmware_node": "",
      "idProduct": "6001",
      "idVendor": "0403",
      "ltm_capable": "no",
      "manufacturer": "FTDI",
      "maxchild": "0",
      "port": "",
      "product": "US232R",
      "quirks": "0x0",
      "removable": "removable",
      "rx_lanes": "1",
      "serial": "FTDBHX3J",
      "speed": "12",
      "subsystem": "usb",
      "tx_lanes": "1",
      "uevent": "MAJOR=189,MINOR=30,DEVNAME=bus/usb/001/031,DEVTYPE=usb_device,DRIVER=usb,PRODUCT=403/6001/600,TYPE=0/0/0,BUSNUM=001,DEVNUM=031",
      "urbnum": "18",
      "version": " 2.00"
    },
    "properties": {
      "ACTION": "add",
      "BUSNUM": "001",
      "DEVNAME": "/dev/bus/usb/001/031",
      "DEVNUM": "031",
      "DEVPATH": "/devices/pci0000:00/0000:00:14.0/usb1/1-1",
      "DEVTYPE": "usb_device",
      "DRIVER": "usb",
      "ID_BUS": "usb",
      "ID_FOR_SEAT": "usb-pci-0000_00_14_0-usb-0_1",
      "ID_MODEL": "US232R",
      "ID_MODEL_ENC": "US232R",
      "ID_MODEL_FROM_DATABASE": "FT232 Serial (UART) IC",
      "ID_MODEL_ID": "6001",
      "ID_PATH": "pci-0000:00:14.0-usb-0:1",
      "ID_PATH_TAG": "pci-0000_00_14_0-usb-0_1",
      "ID_REVISION": "0600",
      "ID_SERIAL": "FTDI_US232R_FTDBHX3J",
      "ID_SERIAL_SHORT": "FTDBHX3J",
      "ID_USB_INTERFACES": ":ffffff:",
      "ID_VENDOR": "FTDI",
      "ID_VENDOR_ENC": "FTDI",
      "ID_VENDOR_FROM_DATABASE": "Future Technology Devices International, Ltd",
      "ID_VENDOR_ID": "0403",
      "MAJOR": "189",
      "MINOR": "30",
      "PRODUCT": "403/6001/600",
      "SEQNUM": "24130",
      "SUBSYSTEM": "usb",
      "TAGS": ":seat:uaccess:",
      "TYPE": "0/0/0",
      "USEC_INITIALIZED": "257380779616"
    }
  }
}

Smithay / udev-rs

Optional serde build feature #45