15 files changed, 271 insertions, 383 deletions

diff --git a/lib/python/qmk/cli/__init__.py b/lib/python/qmk/cli/__init__.py
index ea961315bd..edf351d628 100644
--- a/lib/python/qmk/cli/__init__.py
+++ b/lib/python/qmk/cli/__init__.py
@@ -36,7 +36,6 @@ subcommands = [
     'qmk.cli.chibios.confmigrate',
     'qmk.cli.clean',
     'qmk.cli.compile',
-    'qmk.cli.console',
     'qmk.cli.docs',
     'qmk.cli.doctor',
     'qmk.cli.fileformat',
@@ -46,6 +45,7 @@ subcommands = [
     'qmk.cli.format.python',
     'qmk.cli.format.text',
     'qmk.cli.generate.api',
+    'qmk.cli.generate.compilation_database',
     'qmk.cli.generate.config_h',
     'qmk.cli.generate.dfu_header',
     'qmk.cli.generate.docs',
diff --git a/lib/python/qmk/cli/console.py b/lib/python/qmk/cli/console.py
deleted file mode 100644
index 98c6bc0dc0..0000000000
--- a/lib/python/qmk/cli/console.py
+++ /dev/null
@@ -1,303 +0,0 @@
-"""Acquire debugging information from usb hid devices
-
-cli implementation of https://www.pjrc.com/teensy/hid_listen.html
-"""
-from pathlib import Path
-from threading import Thread
-from time import sleep, strftime
-
-import hid
-import usb.core
-
-from milc import cli
-
-LOG_COLOR = {
-    'next': 0,
-    'colors': [
-        '{fg_blue}',
-        '{fg_cyan}',
-        '{fg_green}',
-        '{fg_magenta}',
-        '{fg_red}',
-        '{fg_yellow}',
-    ],
-}
-
-KNOWN_BOOTLOADERS = {
-    # VID  ,  PID
-    ('03EB', '2FEF'): 'atmel-dfu: ATmega16U2',
-    ('03EB', '2FF0'): 'atmel-dfu: ATmega32U2',
-    ('03EB', '2FF3'): 'atmel-dfu: ATmega16U4',
-    ('03EB', '2FF4'): 'atmel-dfu: ATmega32U4',
-    ('03EB', '2FF9'): 'atmel-dfu: AT90USB64',
-    ('03EB', '2FFA'): 'atmel-dfu: AT90USB162',
-    ('03EB', '2FFB'): 'atmel-dfu: AT90USB128',
-    ('03EB', '6124'): 'Microchip SAM-BA',
-    ('0483', 'DF11'): 'stm32-dfu: STM32 BOOTLOADER',
-    ('16C0', '05DC'): 'usbasploader: USBaspLoader',
-    ('16C0', '05DF'): 'bootloadhid: HIDBoot',
-    ('16C0', '0478'): 'halfkay: Teensy Halfkay',
-    ('1B4F', '9203'): 'caterina: Pro Micro 3.3V',
-    ('1B4F', '9205'): 'caterina: Pro Micro 5V',
-    ('1B4F', '9207'): 'caterina: LilyPadUSB',
-    ('1C11', 'B007'): 'kiibohd: Kiibohd DFU Bootloader',
-    ('1EAF', '0003'): 'stm32duino: Maple 003',
-    ('1FFB', '0101'): 'caterina: Polou A-Star 32U4 Bootloader',
-    ('2341', '0036'): 'caterina: Arduino Leonardo',
-    ('2341', '0037'): 'caterina: Arduino Micro',
-    ('239A', '000C'): 'caterina: Adafruit Feather 32U4',
-    ('239A', '000D'): 'caterina: Adafruit ItsyBitsy 32U4 3v',
-    ('239A', '000E'): 'caterina: Adafruit ItsyBitsy 32U4 5v',
-    ('2A03', '0036'): 'caterina: Arduino Leonardo',
-    ('2A03', '0037'): 'caterina: Arduino Micro',
-    ('314B', '0106'): 'apm32-dfu: APM32 DFU ISP Mode',
-    ('03EB', '2067'): 'qmk-hid: HID Bootloader',
-    ('03EB', '2045'): 'lufa-ms: LUFA Mass Storage Bootloader'
-}
-
-
-class MonitorDevice(object):
-    def __init__(self, hid_device, numeric):
-        self.hid_device = hid_device
-        self.numeric = numeric
-        self.device = hid.Device(path=hid_device['path'])
-        self.current_line = ''
-
-        cli.log.info('Console Connected: %(color)s%(manufacturer_string)s %(product_string)s{style_reset_all} (%(color)s%(vendor_id)04X:%(product_id)04X:%(index)d{style_reset_all})', hid_device)
-
-    def read(self, size, encoding='ascii', timeout=1):
-        """Read size bytes from the device.
-        """
-        return self.device.read(size, timeout).decode(encoding)
-
-    def read_line(self):
-        """Read from the device's console until we get a \n.
-        """
-        while '\n' not in self.current_line:
-            self.current_line += self.read(32).replace('\x00', '')
-
-        lines = self.current_line.split('\n', 1)
-        self.current_line = lines[1]
-
-        return lines[0]
-
-    def run_forever(self):
-        while True:
-            try:
-                message = {**self.hid_device, 'text': self.read_line()}
-                identifier = (int2hex(message['vendor_id']), int2hex(message['product_id'])) if self.numeric else (message['manufacturer_string'], message['product_string'])
-                message['identifier'] = ':'.join(identifier)
-                message['ts'] = '{style_dim}{fg_green}%s{style_reset_all} ' % (strftime(cli.config.general.datetime_fmt),) if cli.args.timestamp else ''
-
-                cli.echo('%(ts)s%(color)s%(identifier)s:%(index)d{style_reset_all}: %(text)s' % message)
-
-            except hid.HIDException:
-                break
-
-
-class FindDevices(object):
-    def __init__(self, vid, pid, index, numeric):
-        self.vid = vid
-        self.pid = pid
-        self.index = index
-        self.numeric = numeric
-
-    def run_forever(self):
-        """Process messages from our queue in a loop.
-        """
-        live_devices = {}
-        live_bootloaders = {}
-
-        while True:
-            try:
-                for device in list(live_devices):
-                    if not live_devices[device]['thread'].is_alive():
-                        cli.log.info('Console Disconnected: %(color)s%(manufacturer_string)s %(product_string)s{style_reset_all} (%(color)s%(vendor_id)04X:%(product_id)04X:%(index)d{style_reset_all})', live_devices[device])
-                        del live_devices[device]
-
-                for device in self.find_devices():
-                    if device['path'] not in live_devices:
-                        device['color'] = LOG_COLOR['colors'][LOG_COLOR['next']]
-                        LOG_COLOR['next'] = (LOG_COLOR['next'] + 1) % len(LOG_COLOR['colors'])
-                        live_devices[device['path']] = device
-
-                        try:
-                            monitor = MonitorDevice(device, self.numeric)
-                            device['thread'] = Thread(target=monitor.run_forever, daemon=True)
-
-                            device['thread'].start()
-                        except Exception as e:
-                            device['e'] = e
-                            device['e_name'] = e.__class__.__name__
-                            cli.log.error("Could not connect to %(color)s%(manufacturer_string)s %(product_string)s{style_reset_all} (%(color)s:%(vendor_id)04X:%(product_id)04X:%(index)d): %(e_name)s: %(e)s", device)
-                            if cli.config.general.verbose:
-                                cli.log.exception(e)
-                            del live_devices[device['path']]
-
-                if cli.args.bootloaders:
-                    for device in self.find_bootloaders():
-                        if device.address in live_bootloaders:
-                            live_bootloaders[device.address]._qmk_found = True
-                        else:
-                            name = KNOWN_BOOTLOADERS[(int2hex(device.idVendor), int2hex(device.idProduct))]
-                            cli.log.info('Bootloader Connected: {style_bright}{fg_magenta}%s', name)
-                            device._qmk_found = True
-                            live_bootloaders[device.address] = device
-
-                    for device in list(live_bootloaders):
-                        if live_bootloaders[device]._qmk_found:
-                            live_bootloaders[device]._qmk_found = False
-                        else:
-                            name = KNOWN_BOOTLOADERS[(int2hex(live_bootloaders[device].idVendor), int2hex(live_bootloaders[device].idProduct))]
-                            cli.log.info('Bootloader Disconnected: {style_bright}{fg_magenta}%s', name)
-                            del live_bootloaders[device]
-
-                sleep(.1)
-
-            except KeyboardInterrupt:
-                break
-
-    def is_bootloader(self, hid_device):
-        """Returns true if the device in question matches a known bootloader vid/pid.
-        """
-        return (int2hex(hid_device.idVendor), int2hex(hid_device.idProduct)) in KNOWN_BOOTLOADERS
-
-    def is_console_hid(self, hid_device):
-        """Returns true when the usage page indicates it's a teensy-style console.
-        """
-        return hid_device['usage_page'] == 0xFF31 and hid_device['usage'] == 0x0074
-
-    def is_filtered_device(self, hid_device):
-        """Returns True if the device should be included in the list of available consoles.
-        """
-        return int2hex(hid_device['vendor_id']) == self.vid and int2hex(hid_device['product_id']) == self.pid
-
-    def find_devices_by_report(self, hid_devices):
-        """Returns a list of available teensy-style consoles by doing a brute-force search.
-
-        Some versions of linux don't report usage and usage_page. In that case we fallback to reading the report (possibly inaccurately) ourselves.
-        """
-        devices = []
-
-        for device in hid_devices:
-            path = device['path'].decode('utf-8')
-
-            if path.startswith('/dev/hidraw'):
-                number = path[11:]
-                report = Path(f'/sys/class/hidraw/hidraw{number}/device/report_descriptor')
-
-                if report.exists():
-                    rp = report.read_bytes()
-
-                    if rp[1] == 0x31 and rp[3] == 0x09:
-                        devices.append(device)
-
-        return devices
-
-    def find_bootloaders(self):
-        """Returns a list of available bootloader devices.
-        """
-        return list(filter(self.is_bootloader, usb.core.find(find_all=True)))
-
-    def find_devices(self):
-        """Returns a list of available teensy-style consoles.
-        """
-        hid_devices = hid.enumerate()
-        devices = list(filter(self.is_console_hid, hid_devices))
-
-        if not devices:
-            devices = self.find_devices_by_report(hid_devices)
-
-        if self.vid and self.pid:
-            devices = list(filter(self.is_filtered_device, devices))
-
-        # Add index numbers
-        device_index = {}
-        for device in devices:
-            id = ':'.join((int2hex(device['vendor_id']), int2hex(device['product_id'])))
-
-            if id not in device_index:
-                device_index[id] = 0
-
-            device_index[id] += 1
-            device['index'] = device_index[id]
-
-        return devices
-
-
-def int2hex(number):
-    """Returns a string representation of the number as hex.
-    """
-    return "%04X" % number
-
-
-def list_devices(device_finder):
-    """Show the user a nicely formatted list of devices.
-    """
-    devices = device_finder.find_devices()
-
-    if devices:
-        cli.log.info('Available devices:')
-        for dev in devices:
-            color = LOG_COLOR['colors'][LOG_COLOR['next']]
-            LOG_COLOR['next'] = (LOG_COLOR['next'] + 1) % len(LOG_COLOR['colors'])
-            cli.log.info("\t%s%s:%s:%d{style_reset_all}\t%s %s", color, int2hex(dev['vendor_id']), int2hex(dev['product_id']), dev['index'], dev['manufacturer_string'], dev['product_string'])
-
-    if cli.args.bootloaders:
-        bootloaders = device_finder.find_bootloaders()
-
-        if bootloaders:
-            cli.log.info('Available Bootloaders:')
-
-            for dev in bootloaders:
-                cli.log.info("\t%s:%s\t%s", int2hex(dev.idVendor), int2hex(dev.idProduct), KNOWN_BOOTLOADERS[(int2hex(dev.idVendor), int2hex(dev.idProduct))])
-
-
-@cli.argument('--bootloaders', arg_only=True, default=True, action='store_boolean', help='displaying bootloaders.')
-@cli.argument('-d', '--device', help='Device to select - uses format <pid>:<vid>[:<index>].')
-@cli.argument('-l', '--list', arg_only=True, action='store_true', help='List available hid_listen devices.')
-@cli.argument('-n', '--numeric', arg_only=True, action='store_true', help='Show VID/PID instead of names.')
-@cli.argument('-t', '--timestamp', arg_only=True, action='store_true', help='Print the timestamp for received messages as well.')
-@cli.argument('-w', '--wait', type=int, default=1, help="How many seconds to wait between checks (Default: 1)")
-@cli.subcommand('Acquire debugging information from usb hid devices.', hidden=False if cli.config.user.developer else True)
-def console(cli):
-    """Acquire debugging information from usb hid devices
-    """
-    vid = None
-    pid = None
-    index = 1
-
-    if cli.config.console.device:
-        device = cli.config.console.device.split(':')
-
-        if len(device) == 2:
-            vid, pid = device
-
-        elif len(device) == 3:
-            vid, pid, index = device
-
-            if not index.isdigit():
-                cli.log.error('Device index must be a number! Got "%s" instead.', index)
-                exit(1)
-
-            index = int(index)
-
-            if index < 1:
-                cli.log.error('Device index must be greater than 0! Got %s', index)
-                exit(1)
-
-        else:
-            cli.log.error('Invalid format for device, expected "<pid>:<vid>[:<index>]" but got "%s".', cli.config.console.device)
-            cli.print_help()
-            exit(1)
-
-        vid = vid.upper()
-        pid = pid.upper()
-
-    device_finder = FindDevices(vid, pid, index, cli.args.numeric)
-
-    if cli.args.list:
-        return list_devices(device_finder)
-
-    print('Looking for devices...', flush=True)
-    device_finder.run_forever()
diff --git a/lib/python/qmk/cli/doctor/check.py b/lib/python/qmk/cli/doctor/check.py
index 0807f41518..2d691b64b0 100644
--- a/lib/python/qmk/cli/doctor/check.py
+++ b/lib/python/qmk/cli/doctor/check.py
@@ -26,7 +26,6 @@ ESSENTIAL_BINARIES = {
     'arm-none-eabi-gcc': {
         'version_arg': '-dumpversion'
     },
-    'bin/qmk': {},
 }
 
 
diff --git a/lib/python/qmk/cli/flash.py b/lib/python/qmk/cli/flash.py
index c2d9e09c69..28e48a4101 100644
--- a/lib/python/qmk/cli/flash.py
+++ b/lib/python/qmk/cli/flash.py
@@ -18,17 +18,21 @@ def print_bootloader_help():
     """Prints the available bootloaders listed in docs.qmk.fm.
     """
     cli.log.info('Here are the available bootloaders:')
+    cli.echo('\tavrdude')
+    cli.echo('\tbootloadhid')
     cli.echo('\tdfu')
+    cli.echo('\tdfu-util')
+    cli.echo('\tmdloader')
+    cli.echo('\tst-flash')
+    cli.echo('\tst-link-cli')
+    cli.log.info('Enhanced variants for split keyboards:')
+    cli.echo('\tavrdude-split-left')
+    cli.echo('\tavrdude-split-right')
     cli.echo('\tdfu-ee')
     cli.echo('\tdfu-split-left')
     cli.echo('\tdfu-split-right')
-    cli.echo('\tavrdude')
-    cli.echo('\tBootloadHID')
-    cli.echo('\tdfu-util')
     cli.echo('\tdfu-util-split-left')
     cli.echo('\tdfu-util-split-right')
-    cli.echo('\tst-link-cli')
-    cli.echo('\tst-flash')
     cli.echo('For more info, visit https://docs.qmk.fm/#/flashing')
 
 
diff --git a/lib/python/qmk/cli/format/python.py b/lib/python/qmk/cli/format/python.py
index 00612f97ec..b32a726401 100755
--- a/lib/python/qmk/cli/format/python.py
+++ b/lib/python/qmk/cli/format/python.py
@@ -11,15 +11,15 @@ def format_python(cli):
     """Format python code according to QMK's style.
     """
     edit = '--diff' if cli.args.dry_run else '--in-place'
-    yapf_cmd = ['yapf', '-vv', '--recursive', edit, 'bin/qmk', 'lib/python']
+    yapf_cmd = ['yapf', '-vv', '--recursive', edit, 'lib/python']
     try:
         cli.run(yapf_cmd, check=True, capture_output=False, stdin=DEVNULL)
-        cli.log.info('Python code in `bin/qmk` and `lib/python` is correctly formatted.')
+        cli.log.info('Python code in `lib/python` is correctly formatted.')
         return True
 
     except CalledProcessError:
         if cli.args.dry_run:
-            cli.log.error('Python code in `bin/qmk` and `lib/python` incorrectly formatted!')
+            cli.log.error('Python code in `lib/python` is incorrectly formatted!')
         else:
             cli.log.error('Error formatting python code!')
 
diff --git a/lib/python/qmk/cli/generate/compilation_database.py b/lib/python/qmk/cli/generate/compilation_database.py
new file mode 100755
index 0000000000..602635270c
--- /dev/null
+++ b/lib/python/qmk/cli/generate/compilation_database.py
@@ -0,0 +1,133 @@
+"""Creates a compilation database for the given keyboard build.
+"""
+
+import json
+import os
+import re
+import shlex
+import shutil
+from functools import lru_cache
+from pathlib import Path
+from typing import Dict, Iterator, List, Union
+
+from milc import cli, MILC
+
+from qmk.commands import create_make_command
+from qmk.constants import QMK_FIRMWARE
+from qmk.decorators import automagic_keyboard, automagic_keymap
+
+
+@lru_cache(maxsize=10)
+def system_libs(binary: str) -> List[Path]:
+    """Find the system include directory that the given build tool uses.
+    """
+    cli.log.debug("searching for system library directory for binary: %s", binary)
+    bin_path = shutil.which(binary)
+
+    # Actually query xxxxxx-gcc to find its include paths.
+    if binary.endswith("gcc") or binary.endswith("g++"):
+        result = cli.run([binary, '-E', '-Wp,-v', '-'], capture_output=True, check=True, input='\n')
+        paths = []
+        for line in result.stderr.splitlines():
+            if line.startswith(" "):
+                paths.append(Path(line.strip()).resolve())
+        return paths
+
+    return list(Path(bin_path).resolve().parent.parent.glob("*/include")) if bin_path else []
+
+
+file_re = re.compile(r'printf "Compiling: ([^"]+)')
+cmd_re = re.compile(r'LOG=\$\((.+?)&&')
+
+
+def parse_make_n(f: Iterator[str]) -> List[Dict[str, str]]:
+    """parse the output of `make -n <target>`
+
+    This function makes many assumptions about the format of your build log.
+    This happens to work right now for qmk.
+    """
+
+    state = 'start'
+    this_file = None
+    records = []
+    for line in f:
+        if state == 'start':
+            m = file_re.search(line)
+            if m:
+                this_file = m.group(1)
+                state = 'cmd'
+
+        if state == 'cmd':
+            assert this_file
+            m = cmd_re.search(line)
+            if m:
+                # we have a hit!
+                this_cmd = m.group(1)
+                args = shlex.split(this_cmd)
+                for s in system_libs(args[0]):
+                    args += ['-isystem', '%s' % s]
+                new_cmd = ' '.join(shlex.quote(s) for s in args if s != '-mno-thumb-interwork')
+                records.append({"directory": str(QMK_FIRMWARE.resolve()), "command": new_cmd, "file": this_file})
+                state = 'start'
+
+    return records
+
+
+@cli.argument('-kb', '--keyboard', help='The keyboard to build a firmware for. Ignored when a configurator export is supplied.')
+@cli.argument('-km', '--keymap', help='The keymap to build a firmware for. Ignored when a configurator export is supplied.')
+@cli.subcommand('Create a compilation database.')
+@automagic_keyboard
+@automagic_keymap
+def generate_compilation_database(cli: MILC) -> Union[bool, int]:
+    """Creates a compilation database for the given keyboard build.
+
+    Does a make clean, then a make -n for this target and uses the dry-run output to create
+    a compilation database (compile_commands.json). This file can help some IDEs and
+    IDE-like editors work better. For more information about this:
+
+        https://clang.llvm.org/docs/JSONCompilationDatabase.html
+    """
+    command = None
+    # check both config domains: the magic decorator fills in `generate_compilation_database` but the user is
+    # more likely to have set `compile` in their config file.
+    current_keyboard = cli.config.generate_compilation_database.keyboard or cli.config.user.keyboard
+    current_keymap = cli.config.generate_compilation_database.keymap or cli.config.user.keymap
+
+    if current_keyboard and current_keymap:
+        # Generate the make command for a specific keyboard/keymap.
+        command = create_make_command(current_keyboard, current_keymap, dry_run=True)
+    elif not current_keyboard:
+        cli.log.error('Could not determine keyboard!')
+    elif not current_keymap:
+        cli.log.error('Could not determine keymap!')
+
+    if not command:
+        cli.log.error('You must supply both `--keyboard` and `--keymap`, or be in a directory for a keyboard or keymap.')
+        cli.echo('usage: qmk compiledb [-kb KEYBOARD] [-km KEYMAP]')
+        return False
+
+    # remove any environment variable overrides which could trip us up
+    env = os.environ.copy()
+    env.pop("MAKEFLAGS", None)
+
+    # re-use same executable as the main make invocation (might be gmake)
+    clean_command = [command[0], 'clean']
+    cli.log.info('Making clean with {fg_cyan}%s', ' '.join(clean_command))
+    cli.run(clean_command, capture_output=False, check=True, env=env)
+
+    cli.log.info('Gathering build instructions from {fg_cyan}%s', ' '.join(command))
+
+    result = cli.run(command, capture_output=True, check=True, env=env)
+    db = parse_make_n(result.stdout.splitlines())
+    if not db:
+        cli.log.error("Failed to parse output from make output:\n%s", result.stdout)
+        return False
+
+    cli.log.info("Found %s compile commands", len(db))
+
+    dbpath = QMK_FIRMWARE / 'compile_commands.json'
+
+    cli.log.info(f"Writing build database to {dbpath}")
+    dbpath.write_text(json.dumps(db, indent=4))
+
+    return True
diff --git a/lib/python/qmk/cli/generate/dfu_header.py b/lib/python/qmk/cli/generate/dfu_header.py
index 5a1b109f1e..7fb585fc7d 100644
--- a/lib/python/qmk/cli/generate/dfu_header.py
+++ b/lib/python/qmk/cli/generate/dfu_header.py
@@ -32,7 +32,7 @@ def generate_dfu_header(cli):
 
     keyboard_h_lines = ['/* This file was generated by `qmk generate-dfu-header`. Do not edit or copy.', ' */', '', '#pragma once']
     keyboard_h_lines.append(f'#define MANUFACTURER {kb_info_json["manufacturer"]}')
-    keyboard_h_lines.append(f'#define PRODUCT {cli.config.generate_dfu_header.keyboard} Bootloader')
+    keyboard_h_lines.append(f'#define PRODUCT {kb_info_json["keyboard_name"]} Bootloader')
 
     # Optional
     if 'qmk_lufa_bootloader.esc_output' in kb_info_json:
diff --git a/lib/python/qmk/cli/generate/rules_mk.py b/lib/python/qmk/cli/generate/rules_mk.py
index dcaff29fae..5d8d7cc8a7 100755
--- a/lib/python/qmk/cli/generate/rules_mk.py
+++ b/lib/python/qmk/cli/generate/rules_mk.py
@@ -67,12 +67,9 @@ def generate_rules_mk(cli):
     # Iterate through features to enable/disable them
     if 'features' in kb_info_json:
         for feature, enabled in kb_info_json['features'].items():
-            if feature == 'bootmagic_lite' and enabled:
-                rules_mk_lines.append('BOOTMAGIC_ENABLE ?= lite')
-            else:
-                feature = feature.upper()
-                enabled = 'yes' if enabled else 'no'
-                rules_mk_lines.append(f'{feature}_ENABLE ?= {enabled}')
+            feature = feature.upper()
+            enabled = 'yes' if enabled else 'no'
+            rules_mk_lines.append(f'{feature}_ENABLE ?= {enabled}')
 
     # Set SPLIT_TRANSPORT, if needed
     if kb_info_json.get('split', {}).get('transport', {}).get('protocol') == 'custom':
diff --git a/lib/python/qmk/cli/lint.py b/lib/python/qmk/cli/lint.py
index 02b31fbc41..96593ed69b 100644
--- a/lib/python/qmk/cli/lint.py
+++ b/lib/python/qmk/cli/lint.py
@@ -1,72 +1,129 @@
 """Command to look over a keyboard/keymap and check for common mistakes.
 """
+from pathlib import Path
+
 from milc import cli
 
 from qmk.decorators import automagic_keyboard, automagic_keymap
 from qmk.info import info_json
-from qmk.keyboard import find_readme, keyboard_completer
+from qmk.keyboard import keyboard_completer, list_keyboards
 from qmk.keymap import locate_keymap
 from qmk.path import is_keyboard, keyboard
 
 
-@cli.argument('--strict', action='store_true', help='Treat warnings as errors.')
-@cli.argument('-kb', '--keyboard', completer=keyboard_completer, help='The keyboard to check.')
-@cli.argument('-km', '--keymap', help='The keymap to check.')
+def keymap_check(kb, km):
+    """Perform the keymap level checks.
+    """
+    ok = True
+    keymap_path = locate_keymap(kb, km)
+
+    if not keymap_path:
+        ok = False
+        cli.log.error("%s: Can't find %s keymap.", kb, km)
+
+    return ok
+
+
+def rules_mk_assignment_only(keyboard_path):
+    """Check the keyboard-level rules.mk to ensure it only has assignments.
+    """
+    current_path = Path()
+    errors = []
+
+    for path_part in keyboard_path.parts:
+        current_path = current_path / path_part
+        rules_mk = current_path / 'rules.mk'
+
+        if rules_mk.exists():
+            continuation = None
+
+            for i, line in enumerate(rules_mk.open()):
+                line = line.strip()
+
+                if '#' in line:
+                    line = line[:line.index('#')]
+
+                if continuation:
+                    line = continuation + line
+                    continuation = None
+
+                if line:
+                    if line[-1] == '\\':
+                        continuation = line[:-1]
+                        continue
+
+                    if line and '=' not in line:
+                        errors.append(f'Non-assignment code on line +{i} {rules_mk}: {line}')
+
+    return errors
+
+
+@cli.argument('--strict', action='store_true', help='Treat warnings as errors')
+@cli.argument('-kb', '--keyboard', completer=keyboard_completer, help='Comma separated list of keyboards to check')
+@cli.argument('-km', '--keymap', help='The keymap to check')
+@cli.argument('--all-kb', action='store_true', arg_only=True, help='Check all keyboards')
 @cli.subcommand('Check keyboard and keymap for common mistakes.')
 @automagic_keyboard
 @automagic_keymap
 def lint(cli):
     """Check keyboard and keymap for common mistakes.
     """
-    if not cli.config.lint.keyboard:
-        cli.log.error('Missing required argument: --keyboard')
-        cli.print_help()
-        return False
+    failed = []
 
-    if not is_keyboard(cli.config.lint.keyboard):
-        cli.log.error('No such keyboard: %s', cli.config.lint.keyboard)
-        return False
+    # Determine our keyboard list
+    if cli.args.all_kb:
+        if cli.args.keyboard:
+            cli.log.warning('Both --all-kb and --keyboard passed, --all-kb takes presidence.')
 
-    # Gather data about the keyboard.
-    ok = True
-    keyboard_path = keyboard(cli.config.lint.keyboard)
-    keyboard_info = info_json(cli.config.lint.keyboard)
-    readme_path = find_readme(cli.config.lint.keyboard)
-    missing_readme_path = keyboard_path / 'readme.md'
+        keyboard_list = list_keyboards()
+    elif not cli.config.lint.keyboard:
+        cli.log.error('Missing required arguments: --keyboard or --all-kb')
+        cli.print_help()
+        return False
+    else:
+        keyboard_list = cli.config.lint.keyboard.split(',')
 
-    # Check for errors in the info.json
-    if keyboard_info['parse_errors']:
-        ok = False
-        cli.log.error('Errors found when generating info.json.')
+    # Lint each keyboard
+    for kb in keyboard_list:
+        if not is_keyboard(kb):
+            cli.log.error('No such keyboard: %s', kb)
+            continue
 
-    if cli.config.lint.strict and keyboard_info['parse_warnings']:
-        ok = False
-        cli.log.error('Warnings found when generating info.json (Strict mode enabled.)')
+        # Gather data about the keyboard.
+        ok = True
+        keyboard_path = keyboard(kb)
+        keyboard_info = info_json(kb)
 
-    # Check for a readme.md and warn if it doesn't exist
-    if not readme_path:
-        ok = False
-        cli.log.error('Missing %s', missing_readme_path)
+        # Check for errors in the info.json
+        if keyboard_info['parse_errors']:
+            ok = False
+            cli.log.error('%s: Errors found when generating info.json.', kb)
 
-    # Keymap specific checks
-    if cli.config.lint.keymap:
-        keymap_path = locate_keymap(cli.config.lint.keyboard, cli.config.lint.keymap)
+        if cli.config.lint.strict and keyboard_info['parse_warnings']:
+            ok = False
+            cli.log.error('%s: Warnings found when generating info.json (Strict mode enabled.)', kb)
 
-        if not keymap_path:
+        # Check the rules.mk file(s)
+        rules_mk_assignment_errors = rules_mk_assignment_only(keyboard_path)
+        if rules_mk_assignment_errors:
             ok = False
-            cli.log.error("Can't find %s keymap for %s keyboard.", cli.config.lint.keymap, cli.config.lint.keyboard)
-        else:
-            keymap_readme = keymap_path.parent / 'readme.md'
-            if not keymap_readme.exists():
-                cli.log.warning('Missing %s', keymap_readme)
+            cli.log.error('%s: Non-assignment code found in rules.mk. Move it to post_rules.mk instead.', kb)
+            for assignment_error in rules_mk_assignment_errors:
+                cli.log.error(assignment_error)
 
-                if cli.config.lint.strict:
-                    ok = False
+        # Keymap specific checks
+        if cli.config.lint.keymap:
+            if not keymap_check(kb, cli.config.lint.keymap):
+                ok = False
+
+        # Report status
+        if not ok:
+            failed.append(kb)
 
     # Check and report the overall status
-    if ok:
-        cli.log.info('Lint check passed!')
-        return True
+    if failed:
+        cli.log.error('Lint check failed for: %s', ', '.join(failed))
+        return False
 
-    cli.log.error('Lint check failed!')
-    return False
+    cli.log.info('Lint check passed!')
+    return True
diff --git a/lib/python/qmk/cli/pytest.py b/lib/python/qmk/cli/pytest.py
index bdb336b9a7..a7f01a872a 100644
--- a/lib/python/qmk/cli/pytest.py
+++ b/lib/python/qmk/cli/pytest.py
@@ -12,6 +12,6 @@ def pytest(cli):
     """Run several linting/testing commands.
     """
     nose2 = cli.run(['nose2', '-v'], capture_output=False, stdin=DEVNULL)
-    flake8 = cli.run(['flake8', 'lib/python', 'bin/qmk'], capture_output=False, stdin=DEVNULL)
+    flake8 = cli.run(['flake8', 'lib/python'], capture_output=False, stdin=DEVNULL)
 
     return flake8.returncode | nose2.returncode
diff --git a/lib/python/qmk/commands.py b/lib/python/qmk/commands.py
index 421453d837..2995a5fdab 100644
--- a/lib/python/qmk/commands.py
+++ b/lib/python/qmk/commands.py
@@ -28,7 +28,7 @@ def _find_make():
     return make_cmd
 
 
-def create_make_target(target, parallel=1, **env_vars):
+def create_make_target(target, dry_run=False, parallel=1, **env_vars):
     """Create a make command
 
     Args:
@@ -36,6 +36,9 @@ def create_make_target(target, parallel=1, **env_vars):
         target
             Usually a make rule, such as 'clean' or 'all'.
 
+        dry_run
+            make -n -- don't actually build
+
         parallel
             The number of make jobs to run in parallel
 
@@ -52,10 +55,10 @@ def create_make_target(target, parallel=1, **env_vars):
     for key, value in env_vars.items():
         env.append(f'{key}={value}')
 
-    return [make_cmd, *get_make_parallel_args(parallel), *env, target]
+    return [make_cmd, *(['-n'] if dry_run else []), *get_make_parallel_args(parallel), *env, target]
 
 
-def create_make_command(keyboard, keymap, target=None, parallel=1, **env_vars):
+def create_make_command(keyboard, keymap, target=None, dry_run=False, parallel=1, **env_vars):
     """Create a make compile command
 
     Args:
@@ -69,6 +72,9 @@ def create_make_command(keyboard, keymap, target=None, parallel=1, **env_vars):
         target
             Usually a bootloader.
 
+        dry_run
+            make -n -- don't actually build
+
         parallel
             The number of make jobs to run in parallel
 
@@ -84,7 +90,7 @@ def create_make_command(keyboard, keymap, target=None, parallel=1, **env_vars):
     if target:
         make_args.append(target)
 
-    return create_make_target(':'.join(make_args), parallel, **env_vars)
+    return create_make_target(':'.join(make_args), dry_run=dry_run, parallel=parallel, **env_vars)
 
 
 def get_git_version(current_time, repo_dir='.', check_dir='.'):
@@ -233,7 +239,7 @@ def compile_configurator_json(user_keymap, bootloader=None, parallel=1, **env_va
         f'VERBOSE={verbose}',
         f'COLOR={color}',
         'SILENT=false',
-        f'QMK_BIN={"bin/qmk" if "DEPRECATED_BIN_QMK" in os.environ else "qmk"}',
+        'QMK_BIN="qmk"',
     ])
 
     return make_command
diff --git a/lib/python/qmk/constants.py b/lib/python/qmk/constants.py
index 71a6c91c77..73f596ba2c 100644
--- a/lib/python/qmk/constants.py
+++ b/lib/python/qmk/constants.py
@@ -13,7 +13,7 @@ QMK_FIRMWARE_UPSTREAM = 'qmk/qmk_firmware'
 MAX_KEYBOARD_SUBFOLDERS = 5
 
 # Supported processor types
-CHIBIOS_PROCESSORS = 'cortex-m0', 'cortex-m0plus', 'cortex-m3', 'cortex-m4', 'MKL26Z64', 'MK20DX128', '