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https://github.com/eclipse-cdt/cdt
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07b50ba2a2
As mentioned in https://devblogs.microsoft.com/oldnewthing/20180103-00/?p=97705, Microsoft has stopped using the _IMAGE_FILE_HEADER.TimeDateStamp as a time stamp and rather as a hash of the source files to make the build result predictable. Change-Id: I4f4a7b9557330e4c478ef7fb25653144c5b2d4ad Signed-off-by: Torbjörn Svensson <azoff@svenskalinuxforeningen.se>
58 lines
1.4 KiB
Python
Executable file
58 lines
1.4 KiB
Python
Executable file
#!/usr/bin/env python3
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import sys
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import os
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import hashlib
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import subprocess
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LONG_MAX = (1 << 64) - 1
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DEBUG = True
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def usage(msg=None):
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if msg:
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print(msg)
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print("Usage: {0} <gcc/g++ command>".format(sys.argv[0]))
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sys.exit(1)
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def debug(s):
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if DEBUG:
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print("{} {}".format(sys.argv[0], s))
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compiler_command = sys.argv[1:]
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if len(compiler_command) == 0:
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usage()
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# Hash all the source files and traverse any directories recursively
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sha1 = hashlib.sha1()
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# Hash the build command too
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sha1.update(" ".join(compiler_command).encode())
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debug("Compiler command hashed: {}".format(sha1.hexdigest()))
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preprocess_command = [*compiler_command, "-E"]
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# Remove any output file (needs to write to stdout)
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try:
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index = compiler_command.index("-o")
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del preprocess_command[index:index+2]
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except ValueError:
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usage("Missing output compiler flag")
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# Preprocess the source file(s)
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debug("Preprocess cmd: {}".format(preprocess_command))
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data = subprocess.check_output(preprocess_command)
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# Hash the content
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sha1.update(data)
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debug("Content hashed: {}".format(sha1.hexdigest()))
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# Set the SOURCE_DATE_EPOCH environment variable to the hash value
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os.environ["SOURCE_DATE_EPOCH"] = str(int(sha1.hexdigest(), base=16) % LONG_MAX)
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debug("SOURCE_DATE_EPOCH: {}".format(os.environ["SOURCE_DATE_EPOCH"]))
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# Run the compiler with the environement variable set
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subprocess.run(compiler_command)
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