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44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
# Copyright (c) 2018, Ansible Project
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# Simplified BSD License (see licenses/simplified_bsd.txt or https://opensource.org/licenses/BSD-2-Clause)
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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from ansible.module_utils.common.file import is_executable
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def get_bin_path(arg, required=False, opt_dirs=None):
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'''
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find system executable in PATH.
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Optional arguments:
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- required: if executable is not found and required is true it produces an Exception
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- opt_dirs: optional list of directories to search in addition to PATH
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if found return full path; otherwise return None
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'''
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opt_dirs = [] if opt_dirs is None else opt_dirs
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sbin_paths = ['/sbin', '/usr/sbin', '/usr/local/sbin']
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paths = []
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for d in opt_dirs:
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if d is not None and os.path.exists(d):
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paths.append(d)
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paths += os.environ.get('PATH', '').split(os.pathsep)
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bin_path = None
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# mangle PATH to include /sbin dirs
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for p in sbin_paths:
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if p not in paths and os.path.exists(p):
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paths.append(p)
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for d in paths:
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if not d:
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continue
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path = os.path.join(d, arg)
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if os.path.exists(path) and not os.path.isdir(path) and is_executable(path):
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bin_path = path
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break
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if required and bin_path is None:
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raise ValueError('Failed to find required executable %s in paths: %s' % (arg, os.pathsep.join(paths)))
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return bin_path
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