3909cdbc2d
Cargo doesn't scan a directory for changed dependencies recursively, so do that as part of the build.py script.
37 lines
1022 B
Python
37 lines
1022 B
Python
"""
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Generate build dependencies for Cargo.
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The `build.py` script is invoked by cargo when building libcretonne to
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generate Rust code from the instruction descriptions. Cargo needs to know when
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it is necessary to rerun the build script.
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If the build script outputs lines of the form:
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cargo:rerun-if-changed=/path/to/file
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cargo will rerun the build script when those files have changed since the last
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build.
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"""
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import os
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from os.path import dirname, abspath, join
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def source_files(top):
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"""
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Recursively find all interesting source files and directories in the
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directory tree starting at top. Yield a path to each file.
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"""
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for (dirpath, dirnames, filenames) in os.walk(top):
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yield dirpath
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for f in filenames:
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if f.endswith('.py'):
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yield join(dirpath, f)
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def generate():
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print "Dependencies from meta language directory:"
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meta = dirname(abspath(__file__))
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for path in source_files(meta):
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print "cargo:rerun-if-changed=" + path
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