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mavutil: Add option to set dialect directly from file #934

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mavutil: Add option to set dialect directly from file #934

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22 changes: 22 additions & 0 deletions mavutil.py
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,28 @@ def set_dialect(dialect, with_type_annotations=None):
current_dialect = dialect
mavlink = mod

def set_dialect_from_file(file):
'''set the MAVLink dialect to work with from a file.
For example, set_dialect_from_file("/home/user/my_dialects/v20/my_special_dialect.py")
'''
global mavlink, current_dialect
import importlib.util

dialect = os.path.splitext(os.path.basename(file))[0]

spec = importlib.util.spec_from_file_location(dialect, file)
mod = importlib.util.module_from_spec(spec)
sys.modules[dialect] = mod
try:
spec.loader.exec_module(mod)
except FileNotFoundError:
print('Could not find dialect file %s' % file)
print('Stay on dialect %s' % current_dialect)
else:
current_dialect = dialect
mavlink = mod
print('Set dialect %s' % current_dialect)

# Set the default dialect. This is done here as it needs to be after the function declaration
set_dialect(os.environ['MAVLINK_DIALECT'])

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