devices/cli: add --json parameter

devices/cli.py

@@ -1,4 +1,5 @@
 import click
+from json import dumps as json_dump
 import logging
 
 from config.state import config
@@ -7,7 +8,8 @@ from .device import get_devices, get_profile_device
 
 
 @click.command(name='devices')
-def cmd_devices():
+@click.option('--json', is_flag=True, help='output machine-parsable JSON format')
+def cmd_devices(json: bool = False):
     'list the available devices and descriptions'
     devices = get_devices()
     if not devices:
@@ -20,6 +22,7 @@ def cmd_devices():
     except Exception as ex:
         logging.debug(f"Failed to get profile device for visual highlighting, not a problem: {ex}")
     output = ['']
+    json_output = {}
     for name in sorted(devices.keys()):
         prefix = ''
         suffix = ''
@@ -29,6 +32,9 @@ def cmd_devices():
             device.parse_deviceinfo(try_download=False)
         except Exception as ex:
             logging.debug(f"Failed to parse deviceinfo for extended description, not a problem: {ex}")
+        if json:
+            json_output[name] = device.get_summary().toDict()
+            continue
         if profile_device and profile_device.name == device.name:
             prefix = '>>> '
             suffix = f'\n\nCurrently selected by profile "{config.file.profiles.current}"'
@@ -36,5 +42,7 @@ def cmd_devices():
         # prefix each line in the snippet
         snippet = '\n'.join([f'{prefix}{line}' for line in snippet.split('\n')])
         output.append(f"{snippet}\n")
+    if json:
+        output = ['\n' + json_dump(json_output, indent=4)]
     for line in output:
         print(line)