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authorErik Dubois2017-04-23 16:14:06 -0400
committerErik Dubois2017-04-23 16:14:06 -0400
commitfcd65e37431baa6f3bf582bf891761c302dac8cc (patch)
tree0ee51baed25f58e89cf3c56ec16f191272ad8f87 /find-deps.py
parent37d68c77eaaeb1ff6f003d19642543080083ad7e (diff)
downloadaur-fcd65e37431baa6f3bf582bf891761c302dac8cc.tar.gz
updating
Diffstat (limited to 'find-deps.py')
-rwxr-xr-xfind-deps.py48
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diff --git a/find-deps.py b/find-deps.py
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+#!/usr/bin/env python3
+
+"""
+Usage: find-deps.py <binary> [<binary> ...]
+
+Finds (pacman/ALPM) dependencies for a binary or set of binaries based
+on dynamically linked libraries.
+
+"""
+
+import sys
+import os
+import subprocess
+import re
+
+def subprocess_get_lines(args, fail_okay=False):
+ try:
+ output = subprocess.check_output(args)
+ except subprocess.CalledProcessError as e:
+ if fail_okay:
+ output = e.output
+ else:
+ raise
+ return output.decode().splitlines()
+
+# Get the filenames of the libs we need
+#del os.environ['LD_PRELOAD'] # otherwise fakeroot will interfere
+ldd_output = subprocess_get_lines(['ldd'] + sys.argv[1:])
+regex = re.compile(r' => (.*) \(0x[0-9a-f]+\)$')
+libs = set(match.group(1) for match in map(regex.search, ldd_output) if match)
+
+# Figure out which packages own them
+deps = set(subprocess_get_lines(
+ ['pacman', '--query', '--owns', '--quiet'] + list(libs),
+ fail_okay=True
+))
+
+# Remove redundant dependencies
+needed = set(deps)
+for pkg in deps:
+ if pkg not in needed:
+ continue # this subtree has already been pruned
+ redundant = subprocess_get_lines(
+ ['pactree', '--unique', pkg]
+ )[1:] # first line is pkg itself
+ needed.difference_update(redundant)
+
+print(' '.join(sorted(needed)))