6 files changed, 493 insertions, 0 deletions
diff --git a/lib/python/qmk/cli/doctor/__init__.py b/lib/python/qmk/cli/doctor/__init__.py
new file mode 100755
index 0000000000..272e042023
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/__init__.py
@@ -0,0 +1,5 @@
+"""QMK Doctor
+
+Check out the user's QMK environment and make sure it's ready to compile.
+"""
+from .main import doctor
diff --git a/lib/python/qmk/cli/doctor/check.py b/lib/python/qmk/cli/doctor/check.py
new file mode 100644
index 0000000000..a0bbb28168
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/check.py
@@ -0,0 +1,164 @@
+"""Check for specific programs.
+"""
+from enum import Enum
+import re
+import shutil
+from subprocess import DEVNULL
+
+from milc import cli
+from qmk import submodules
+from qmk.constants import QMK_FIRMWARE
+
+
+class CheckStatus(Enum):
+    OK = 1
+    WARNING = 2
+    ERROR = 3
+
+
+ESSENTIAL_BINARIES = {
+    'dfu-programmer': {},
+    'avrdude': {},
+    'dfu-util': {},
+    'avr-gcc': {
+        'version_arg': '-dumpversion'
+    },
+    'arm-none-eabi-gcc': {
+        'version_arg': '-dumpversion'
+    },
+    'bin/qmk': {},
+}
+
+
+def _parse_gcc_version(version):
+    m = re.match(r"(\d+)(?:\.(\d+))?(?:\.(\d+))?", version)
+
+    return {
+        'major': int(m.group(1)),
+        'minor': int(m.group(2)) if m.group(2) else 0,
+        'patch': int(m.group(3)) if m.group(3) else 0,
+    }
+
+
+def _check_arm_gcc_version():
+    """Returns True if the arm-none-eabi-gcc version is not known to cause problems.
+    """
+    if 'output' in ESSENTIAL_BINARIES['arm-none-eabi-gcc']:
+        version_number = ESSENTIAL_BINARIES['arm-none-eabi-gcc']['output'].strip()
+        cli.log.info('Found arm-none-eabi-gcc version %s', version_number)
+
+    return CheckStatus.OK  # Right now all known arm versions are ok
+
+
+def _check_avr_gcc_version():
+    """Returns True if the avr-gcc version is not known to cause problems.
+    """
+    rc = CheckStatus.ERROR
+    if 'output' in ESSENTIAL_BINARIES['avr-gcc']:
+        version_number = ESSENTIAL_BINARIES['avr-gcc']['output'].strip()
+
+        cli.log.info('Found avr-gcc version %s', version_number)
+        rc = CheckStatus.OK
+
+        parsed_version = _parse_gcc_version(version_number)
+        if parsed_version['major'] > 8:
+            cli.log.warning('{fg_yellow}We do not recommend avr-gcc newer than 8. Downgrading to 8.x is recommended.')
+            rc = CheckStatus.WARNING
+
+    return rc
+
+
+def _check_avrdude_version():
+    if 'output' in ESSENTIAL_BINARIES['avrdude']:
+        last_line = ESSENTIAL_BINARIES['avrdude']['output'].split('\n')[-2]
+        version_number = last_line.split()[2][:-1]
+        cli.log.info('Found avrdude version %s', version_number)
+
+    return CheckStatus.OK
+
+
+def _check_dfu_util_version():
+    if 'output' in ESSENTIAL_BINARIES['dfu-util']:
+        first_line = ESSENTIAL_BINARIES['dfu-util']['output'].split('\n')[0]
+        version_number = first_line.split()[1]
+        cli.log.info('Found dfu-util version %s', version_number)
+
+    return CheckStatus.OK
+
+
+def _check_dfu_programmer_version():
+    if 'output' in ESSENTIAL_BINARIES['dfu-programmer']:
+        first_line = ESSENTIAL_BINARIES['dfu-programmer']['output'].split('\n')[0]
+        version_number = first_line.split()[1]
+        cli.log.info('Found dfu-programmer version %s', version_number)
+
+    return CheckStatus.OK
+
+
+def check_binaries():
+    """Iterates through ESSENTIAL_BINARIES and tests them.
+    """
+    ok = True
+
+    for binary in sorted(ESSENTIAL_BINARIES):
+        if not is_executable(binary):
+            ok = False
+
+    return ok
+
+
+def check_binary_versions():
+    """Check the versions of ESSENTIAL_BINARIES
+    """
+    versions = []
+    for check in (_check_arm_gcc_version, _check_avr_gcc_version, _check_avrdude_version, _check_dfu_util_version, _check_dfu_programmer_version):
+        versions.append(check())
+    return versions
+
+
+def check_submodules():
+    """Iterates through all submodules to make sure they're cloned and up to date.
+    """
+    for submodule in submodules.status().values():
+        if submodule['status'] is None:
+            cli.log.error('Submodule %s has not yet been cloned!', submodule['name'])
+            return CheckStatus.ERROR
+        elif not submodule['status']:
+            cli.log.warning('Submodule %s is not up to date!', submodule['name'])
+            return CheckStatus.WARNING
+
+    return CheckStatus.OK
+
+
+def is_executable(command):
+    """Returns True if command exists and can be executed.
+    """
+    # Make sure the command is in the path.
+    res = shutil.which(command)
+    if res is None:
+        cli.log.error("{fg_red}Can't find %s in your path.", command)
+        return False
+
+    # Make sure the command can be executed
+    version_arg = ESSENTIAL_BINARIES[command].get('version_arg', '--version')
+    check = cli.run([command, version_arg], combined_output=True, stdin=DEVNULL, timeout=5)
+
+    ESSENTIAL_BINARIES[command]['output'] = check.stdout
+
+    if check.returncode in [0, 1]:  # Older versions of dfu-programmer exit 1
+        cli.log.debug('Found {fg_cyan}%s', command)
+        return True
+
+    cli.log.error("{fg_red}Can't run `%s %s`", command, version_arg)
+    return False
+
+
+def check_git_repo():
+    """Checks that the .git directory exists inside QMK_HOME.
+
+    This is a decent enough indicator that the qmk_firmware directory is a
+    proper Git repository, rather than a .zip download from GitHub.
+    """
+    dot_git_dir = QMK_FIRMWARE / '.git'
+
+    return CheckStatus.OK if dot_git_dir.is_dir() else CheckStatus.WARNING
diff --git a/lib/python/qmk/cli/doctor/linux.py b/lib/python/qmk/cli/doctor/linux.py
new file mode 100644
index 0000000000..c0b77216a1
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/linux.py
@@ -0,0 +1,162 @@
+"""OS-specific functions for: Linux
+"""
+import platform
+import shutil
+from pathlib import Path
+
+from milc import cli
+
+from qmk.constants import QMK_FIRMWARE
+from .check import CheckStatus
+
+
+def _udev_rule(vid, pid=None, *args):
+    """ Helper function that return udev rules
+    """
+    rule = ""
+    if pid:
+        rule = 'SUBSYSTEMS=="usb", ATTRS{idVendor}=="%s", ATTRS{idProduct}=="%s", TAG+="uaccess"' % (
+            vid,
+            pid,
+        )
+    else:
+        rule = 'SUBSYSTEMS=="usb", ATTRS{idVendor}=="%s", TAG+="uaccess"' % vid
+    if args:
+        rule = ', '.join([rule, *args])
+    return rule
+
+
+def _deprecated_udev_rule(vid, pid=None):
+    """ Helper function that return udev rules
+
+    Note: these are no longer the recommended rules, this is just used to check for them
+    """
+    if pid:
+        return 'SUBSYSTEMS=="usb", ATTRS{idVendor}=="%s", ATTRS{idProduct}=="%s", MODE:="0666"' % (vid, pid)
+    else:
+        return 'SUBSYSTEMS=="usb", ATTRS{idVendor}=="%s", MODE:="0666"' % vid
+
+
+def check_udev_rules():
+    """Make sure the udev rules look good.
+    """
+    rc = CheckStatus.OK
+    udev_dir = Path("/etc/udev/rules.d/")
+    desired_rules = {
+        'atmel-dfu': {
+            _udev_rule("03eb", "2fef"),  # ATmega16U2
+            _udev_rule("03eb", "2ff0"),  # ATmega32U2
+            _udev_rule("03eb", "2ff3"),  # ATmega16U4
+            _udev_rule("03eb", "2ff4"),  # ATmega32U4
+            _udev_rule("03eb", "2ff9"),  # AT90USB64
+            _udev_rule("03eb", "2ffa"),  # AT90USB162
+            _udev_rule("03eb", "2ffb")  # AT90USB128
+        },
+        'kiibohd': {_udev_rule("1c11", "b007")},
+        'stm32': {
+            _udev_rule("1eaf", "0003"),  # STM32duino
+            _udev_rule("0483", "df11")  # STM32 DFU
+        },
+        'bootloadhid': {_udev_rule("16c0", "05df")},
+        'usbasploader': {_udev_rule("16c0", "05dc")},
+        'massdrop': {_udev_rule("03eb", "6124", 'ENV{ID_MM_DEVICE_IGNORE}="1"')},
+        'caterina': {
+            # Spark Fun Electronics
+            _udev_rule("1b4f", "9203", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # Pro Micro 3V3/8MHz
+            _udev_rule("1b4f", "9205", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # Pro Micro 5V/16MHz
+            _udev_rule("1b4f", "9207", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # LilyPad 3V3/8MHz (and some Pro Micro clones)
+            # Pololu Electronics
+            _udev_rule("1ffb", "0101", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # A-Star 32U4
+            # Arduino SA
+            _udev_rule("2341", "0036", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # Leonardo
+            _udev_rule("2341", "0037", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # Micro
+            # Adafruit Industries LLC
+            _udev_rule("239a", "000c", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # Feather 32U4
+            _udev_rule("239a", "000d", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # ItsyBitsy 32U4 3V3/8MHz
+            _udev_rule("239a", "000e", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # ItsyBitsy 32U4 5V/16MHz
+            # dog hunter AG
+            _udev_rule("2a03", "0036", 'ENV{ID_MM_DEVICE_IGNORE}="1"'),  # Leonardo
+            _udev_rule("2a03", "0037", 'ENV{ID_MM_DEVICE_IGNORE}="1"')  # Micro
+        }
+    }
+
+    # These rules are no longer recommended, only use them to check for their presence.
+    deprecated_rules = {
+        'atmel-dfu': {_deprecated_udev_rule("03eb", "2ff4"), _deprecated_udev_rule("03eb", "2ffb"), _deprecated_udev_rule("03eb", "2ff0")},
+        'kiibohd': {_deprecated_udev_rule("1c11")},
+        'stm32': {_deprecated_udev_rule("1eaf", "0003"), _deprecated_udev_rule("0483", "df11")},
+        'bootloadhid': {_deprecated_udev_rule("16c0", "05df")},
+        'caterina': {'ATTRS{idVendor}=="2a03", ENV{ID_MM_DEVICE_IGNORE}="1"', 'ATTRS{idVendor}=="2341", ENV{ID_MM_DEVICE_IGNORE}="1"'},
+        'tmk': {_deprecated_udev_rule("feed")}
+    }
+
+    if udev_dir.exists():
+        udev_rules = [rule_file for rule_file in udev_dir.glob('*.rules')]
+        current_rules = set()
+
+        # Collect all rules from the config files
+        for rule_file in udev_rules:
+            for line in rule_file.read_text(encoding='utf-8').split('\n'):
+                line = line.strip()
+                if not line.startswith("#") and len(line):
+                    current_rules.add(line)
+
+        # Check if the desired rules are among the currently present rules
+        for bootloader, rules in desired_rules.items():
+            if not rules.issubset(current_rules):
+                deprecated_rule = deprecated_rules.get(bootloader)
+                if deprecated_rule and deprecated_rule.issubset(current_rules):
+                    cli.log.warning("{fg_yellow}Found old, deprecated udev rules for '%s' boards. The new rules on https://docs.qmk.fm/#/faq_build?id=linux-udev-rules offer better security with the same functionality.", bootloader)
+                else:
+                    # For caterina, check if ModemManager is running
+                    if bootloader == "caterina":
+                        if check_modem_manager():
+                            rc = CheckStatus.WARNING
+                            cli.log.warning("{fg_yellow}Detected ModemManager without the necessary udev rules. Please either disable it or set the appropriate udev rules if you are using a Pro Micro.")
+                    rc = CheckStatus.WARNING
+                    cli.log.warning("{fg_yellow}Missing or outdated udev rules for '%s' boards. Run 'sudo cp %s/util/udev/50-qmk.rules /etc/udev/rules.d/'.", bootloader, QMK_FIRMWARE)
+
+    else:
+        cli.log.warning("{fg_yellow}'%s' does not exist. Skipping udev rule checking...", udev_dir)
+
+    return rc
+
+
+def check_systemd():
+    """Check if it's a systemd system
+    """
+    return bool(shutil.which("systemctl"))
+
+
+def check_modem_manager():
+    """Returns True if ModemManager is running.
+
+    """
+    if check_systemd():
+        mm_check = cli.run(["systemctl", "--quiet", "is-active", "ModemManager.service"], timeout=10)
+        if mm_check.returncode == 0:
+            return True
+    else:
+        """(TODO): Add check for non-systemd systems
+        """
+    return False
+
+
+def os_test_linux():
+    """Run the Linux specific tests.
+    """
+    # Don't bother with udev on WSL, for now
+    if 'microsoft' in platform.uname().release.lower():
+        cli.log.info("Detected {fg_cyan}Linux (WSL){fg_reset}.")
+
+        # https://github.com/microsoft/WSL/issues/4197
+        if QMK_FIRMWARE.as_posix().startswith("/mnt"):
+            cli.log.warning("I/O performance on /mnt may be extremely slow.")
+            return CheckStatus.WARNING
+
+        return CheckStatus.OK
+    else:
+        cli.log.info("Detected {fg_cyan}Linux{fg_reset}.")
+        from .linux import check_udev_rules
+
+        return check_udev_rules()
diff --git a/lib/python/qmk/cli/doctor/macos.py b/lib/python/qmk/cli/doctor/macos.py
new file mode 100644
index 0000000000..00fb272858
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/macos.py
@@ -0,0 +1,13 @@
+import platform
+
+from milc import cli
+
+from .check import CheckStatus
+
+
+def os_test_macos():
+    """Run the Mac specific tests.
+    """
+    cli.log.info("Detected {fg_cyan}macOS %s{fg_reset}.", platform.mac_ver()[0])
+
+    return CheckStatus.OK
diff --git a/lib/python/qmk/cli/doctor/main.py b/lib/python/qmk/cli/doctor/main.py
new file mode 100755
index 0000000000..6a31ccdfdd
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/main.py
@@ -0,0 +1,135 @@
+"""QMK Doctor
+
+Check out the user's QMK environment and make sure it's ready to compile.
+"""
+import platform
+from subprocess import DEVNULL
+
+from milc import cli
+from milc.questions import yesno
+
+from qmk import submodules
+from qmk.constants import QMK_FIRMWARE, QMK_FIRMWARE_UPSTREAM
+from .check import CheckStatus, check_binaries, check_binary_versions, check_submodules
+from qmk.commands import git_check_repo, git_get_branch, git_is_dirty, git_get_remotes, git_check_deviation, in_virtualenv
+
+
+def os_tests():
+    """Determine our OS and run platform specific tests
+    """
+    platform_id = platform.platform().lower()
+
+    if 'darwin' in platform_id or 'macos' in platform_id:
+        from .macos import os_test_macos
+        return os_test_macos()
+    elif 'linux' in platform_id:
+        from .linux import os_test_linux
+        return os_test_linux()
+    elif 'windows' in platform_id:
+        from .windows import os_test_windows
+        return os_test_windows()
+    else:
+        cli.log.warning('Unsupported OS detected: %s', platform_id)
+        return CheckStatus.WARNING
+
+
+def git_tests():
+    """Run Git-related checks
+    """
+    status = CheckStatus.OK
+
+    # Make sure our QMK home is a Git repo
+    git_ok = git_check_repo()
+    if not git_ok:
+        cli.log.warning("{fg_yellow}QMK home does not appear to be a Git repository! (no .git folder)")
+        status = CheckStatus.WARNING
+    else:
+        git_branch = git_get_branch()
+        if git_branch:
+            cli.log.info('Git branch: %s', git_branch)
+            git_dirty = git_is_dirty()
+            if git_dirty:
+                cli.log.warning('{fg_yellow}Git has unstashed/uncommitted changes.')
+                status = CheckStatus.WARNING
+            git_remotes = git_get_remotes()
+            if 'upstream' not in git_remotes.keys() or QMK_FIRMWARE_UPSTREAM not in git_remotes['upstream'].get('url', ''):
+                cli.log.warning('{fg_yellow}The official repository does not seem to be configured as git remote "upstream".')
+                status = CheckStatus.WARNING
+            else:
+                git_deviation = git_check_deviation(git_branch)
+                if git_branch in ['master', 'develop'] and git_deviation:
+                    cli.log.warning('{fg_yellow}The local "%s" branch contains commits not found in the upstream branch.', git_branch)
+                    status = CheckStatus.WARNING
+
+    return status
+
+
+@cli.argument('-y', '--yes', action='store_true', arg_only=True, help='Answer yes to all questions.')
+@cli.argument('-n', '--no', action='store_true', arg_only=True, help='Answer no to all questions.')
+@cli.subcommand('Basic QMK environment checks')
+def doctor(cli):
+    """Basic QMK environment checks.
+
+    This is currently very simple, it just checks that all the expected binaries are on your system.
+
+    TODO(unclaimed):
+        * [ ] Compile a trivial program with each compiler
+    """
+    cli.log.info('QMK Doctor is checking your environment.')
+    cli.log.info('CLI version: %s', cli.version)
+    cli.log.info('QMK home: {fg_cyan}%s', QMK_FIRMWARE)
+
+    status = os_tests()
+
+    status = git_tests()
+
+    venv = in_virtualenv()
+    if venv:
+        cli.log.info('CLI installed in virtualenv.')
+
+    # Make sure the basic CLI tools we need are available and can be executed.
+    bin_ok = check_binaries()
+
+    if not bin_ok:
+        if yesno('Would you like to install dependencies?', default=True):
+            cli.run(['util/qmk_install.sh', '-y'], stdin=DEVNULL, capture_output=False)
+            bin_ok = check_binaries()
+
+    if bin_ok:
+        cli.log.info('All dependencies are installed.')
+    else:
+        status = CheckStatus.ERROR
+
+    # Make sure the tools are at the correct version
+    ver_ok = check_binary_versions()
+    if CheckStatus.ERROR in ver_ok:
+        status = CheckStatus.ERROR
+    elif CheckStatus.WARNING in ver_ok and status == CheckStatus.OK:
+        status = CheckStatus.WARNING
+
+    # Check out the QMK submodules
+    sub_ok = check_submodules()
+
+    if sub_ok == CheckStatus.OK:
+        cli.log.info('Submodules are up to date.')
+    else:
+        if yesno('Would you like to clone the submodules?', default=True):
+            submodules.update()
+            sub_ok = check_submodules()
+
+        if sub_ok == CheckStatus.ERROR:
+            status = CheckStatus.ERROR
+        elif sub_ok == CheckStatus.WARNING and status == CheckStatus.OK:
+            status = CheckStatus.WARNING
+
+    # Report a summary of our findings to the user
+    if status == CheckStatus.OK:
+        cli.log.info('{fg_green}QMK is ready to go')
+        return 0
+    elif status == CheckStatus.WARNING:
+        cli.log.info('{fg_yellow}QMK is ready to go, but minor problems were found')
+        return 1
+    else:
+        cli.log.info('{fg_red}Major problems detected, please fix these problems before proceeding.')
+        cli.log.info('{fg_blue}Check out the FAQ (https://docs.qmk.fm/#/faq_build) or join the QMK Discord (https://discord.gg/Uq7gcHh) for help.')
+        return 2
diff --git a/lib/python/qmk/cli/doctor/windows.py b/lib/python/qmk/cli/doctor/windows.py
new file mode 100644
index 0000000000..381ab36fde
--- /dev/null
+++ b/lib/python/qmk/cli/doctor/windows.py
@@ -0,0 +1,14 @@
+import platform
+
+from milc import cli
+
+from .check import CheckStatus
+
+
+def os_test_windows():
+    """Run the Windows specific tests.
+    """
+    win32_ver = platform.win32_ver()
+    cli.log.info("Detected {fg_cyan}Windows %s (%s){fg_reset}.", win32_ver[0], win32_ver[1])
+
+    return CheckStatus.OK