os_dep.py revision 0afbb6369aa5aa9a75ea67dd9e95ec4b21c0c181 
1#!/usr/bin/python
2import os
3
4"""
5One day, when this module grows up, it might actually try to fix things.
6'apt-cache search | apt-get install' ... or a less terrifying version of
7the same. With added distro-independant pixie dust.
8"""
9
10def command(cmd):
11    # this could use '/usr/bin/which', I suppose. But this seems simpler
12    for dir in os.environ['PATH'].split(':'):
13        file = os.path.join(dir, cmd)
14        if os.path.exists(file):
15            return file
16    raise ValueError('Missing command: %s' % cmd)
17
18
19def commands(*cmds):
20    results = []
21    for cmd in cmds:
22        results.append(command(cmd))
23
24
25def library(lib):
26    lddirs = [x.rstrip() for x in open('/etc/ld.so.conf', 'r').readlines()]
27    for dir in ['/lib', '/usr/lib'] + lddirs:
28        file = os.path.join(dir, lib)
29        if os.path.exists(file):
30            return file
31    raise ValueError('Missing library: %s' % lib)
32
33
34def libraries(*libs):
35    results = []
36    for lib in libs:
37        results.append(library(lib))
38