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#!/usr/bin/env python
"""Removes hash information from requirement files passed to it as file path
arguments or simply piped to stdin."""
import re
import sys
def process_entries(entries):
"""Strips off hash strings from dependencies.
:param list entries: List of entries
:returns: list of dependencies without hashes
:rtype: list
"""
out_lines = []
for e in entries:
e = e.strip()
search = re.search(r'^(\S*==\S*).*$', e)
if search:
out_lines.append(search.group(1))
return out_lines
def main(*paths):
"""
Reads dependency definitions from a (list of) file(s) provided on the
command line. If no command line arguments are present, data is read from
stdin instead.
Hashes are removed from returned entries.
"""
deps = []
if paths:
for path in paths:
with open(path) as file_h:
deps += process_entries(file_h.readlines())
else:
# Need to check if interactive to avoid blocking if nothing is piped
if not sys.stdin.isatty():
stdin_data = []
for line in sys.stdin:
stdin_data.append(line)
deps += process_entries(stdin_data)
return "\n".join(deps)
if __name__ == '__main__':
print(main(*sys.argv[1:])) # pylint: disable=star-args
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