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A ‘forwarding module’ is a YAML file that’s meant to stand in for a .swiftmodule file and provide an up-to-date description of its dependencies, always using modification times. When a ‘prebuilt module’ is first loaded, we verify that it’s up-to-date by hashing all of its dependencies. Since this is orders of magnitude slower than reading mtimes, we’ll install a `forwarding module` containing the mtimes of the now-validated dependencies.
8 lines
231 B
Python
8 lines
231 B
Python
import sys
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with open(sys.argv[1], 'r') as yaml_file:
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# Forwarding files are YAML files that start with '---'
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if yaml_file.read(3) != '---':
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print("swiftmodule '%s' is not a forwarding module!")
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sys.exit(1)
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