1 files changed, 165 insertions, 0 deletions
diff --git a/lib/python/qmk/os_helpers/__init__.py b/lib/python/qmk/os_helpers/__init__.py
new file mode 100644
index 0000000000..3f64a63a3a
--- /dev/null
+++ b/lib/python/qmk/os_helpers/__init__.py
@@ -0,0 +1,165 @@
+"""OS-agnostic helper functions
+"""
+from enum import Enum
+import re
+import shutil
+import subprocess
+
+from milc import cli
+from qmk.commands import run
+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 = run([command, version_arg], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, timeout=5, universal_newlines=True)
+
+    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