49 lines
1.3 KiB
Python
Executable File
49 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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Usage: find-deps.py <binary> [<binary> ...]
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Finds (pacman/ALPM) dependencies for a binary or set of binaries based
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on dynamically linked libraries.
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"""
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import sys
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import os
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import subprocess
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import re
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def subprocess_get_lines(args, fail_okay=False):
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try:
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output = subprocess.check_output(args)
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except subprocess.CalledProcessError as e:
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if fail_okay:
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output = e.output
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else:
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raise
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return output.decode().splitlines()
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# Get the filenames of the libs we need
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#del os.environ['LD_PRELOAD'] # otherwise fakeroot will interfere
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ldd_output = subprocess_get_lines(['ldd'] + sys.argv[1:])
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regex = re.compile(r' => (.*) \(0x[0-9a-f]+\)$')
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libs = set(match.group(1) for match in map(regex.search, ldd_output) if match)
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# Figure out which packages own them
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deps = set(subprocess_get_lines(
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['pacman', '--query', '--owns', '--quiet'] + list(libs),
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fail_okay=True
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))
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# Remove redundant dependencies
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needed = set(deps)
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for pkg in deps:
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if pkg not in needed:
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continue # this subtree has already been pruned
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redundant = subprocess_get_lines(
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['pactree', '--unique', pkg]
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)[1:] # first line is pkg itself
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needed.difference_update(redundant)
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print(' '.join(sorted(needed)))
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