30 lines
781 B
Python
30 lines
781 B
Python
# Copyright (c) 2020 Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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"""
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Helper functions used by gen_kconfig_rest.py and gen_devicetree_rest.py.
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"""
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import errno
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def write_if_updated(path, s):
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"""
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Writes 's' as the contents of <out_dir>/<filename>, but only if it
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differs from the current contents of the file. This avoids unnecessary
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timestamp updates, which trigger documentation rebuilds.
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Returns True if the file was updated, False otherwise.
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"""
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try:
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with open(path, "r", encoding="utf-8") as f:
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if s == f.read():
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return False
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise
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with open(path, "w", encoding="utf-8") as f:
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f.write(s)
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return True
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