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# Copyright © 2010-2013 Piotr Ożarowski <piotr@debian.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import logging
import os
import re
from os.path import exists, isdir, join
from subprocess import PIPE, Popen
from dhpython import PKG_PREFIX_MAP, PUBLIC_DIR_RE,\
PYDIST_DIRS, PYDIST_OVERRIDES_FNAMES, PYDIST_DPKG_SEARCH_TPLS
from dhpython.version import get_requested_versions, Version
from dhpython.tools import memoize
log = logging.getLogger('dhpython')
PYDIST_RE = re.compile(r"""
(?P<name>[A-Za-z][A-Za-z0-9_.\-]*) # Python distribution name
\s*
(?P<vrange>(?:-?\d\.\d+(?:-(?:\d\.\d+)?)?)?) # version range
\s*
(?P<dependency>(?:[a-z][^;]*)?) # Debian dependency
(?: # optional upstream version -> Debian version translator
;\s*
(?P<standard>PEP386)? # PEP-386 mode
\s*
(?P<rules>(?:s|tr|y).*)? # translator rules
)?
""", re.VERBOSE)
REQUIRES_RE = re.compile(r'''
(?P<name>[A-Za-z][A-Za-z0-9_.]*) # Python distribution name
\s*
(?P<enabled_extras>(?:\[[^\]]*\])?) # ignored for now
\s*
\(? # optional parenthesis
(?: # optional minimum/maximum version
(?P<operator><=?|>=?|==|!=)
\s*
(?P<version>(\w|[-.])+)
)?
\)? # optional closing parenthesis
''', re.VERBOSE)
def validate(fpath):
"""Check if pydist file looks good."""
with open(fpath, encoding='utf-8') as fp:
for line in fp:
line = line.strip('\r\n')
if line.startswith('#') or not line:
continue
if not PYDIST_RE.match(line):
log.error('invalid pydist data in file %s: %s',
fpath.rsplit('/', 1)[-1], line)
return False
return True
@memoize
def load(impl):
"""Load iformation about installed Python distributions.
:param impl: interpreter implementation, f.e. cpython2, cpython3, pypy
:type impl: str
"""
fname = PYDIST_OVERRIDES_FNAMES.get(impl)
if exists(fname):
to_check = [fname] # first one!
else:
to_check = []
dname = PYDIST_DIRS.get(impl)
if isdir(dname):
to_check.extend(join(dname, i) for i in os.listdir(dname))
fbname = '/usr/share/dh-python/dist/{}_fallback'.format(impl)
if exists(fbname): # fall back generated at dh-python build time
to_check.append(fbname) # last one!
result = {}
for fpath in to_check:
with open(fpath, encoding='utf-8') as fp:
for line in fp:
line = line.strip('\r\n')
if line.startswith('#') or not line:
continue
dist = PYDIST_RE.search(line)
if not dist:
raise Exception('invalid pydist line: %s (in %s)' % (line, fpath))
dist = dist.groupdict()
name = safe_name(dist['name'])
dist['versions'] = get_requested_versions(impl, dist['vrange'])
dist['dependency'] = dist['dependency'].strip()
if dist['rules']:
dist['rules'] = dist['rules'].split(';')
else:
dist['rules'] = []
result.setdefault(name, []).append(dist)
return result
def guess_dependency(impl, req, version=None):
log.debug('trying to find dependency for %s (python=%s)',
req, version)
if isinstance(version, str):
version = Version(version)
# some upstreams have weird ideas for distribution name...
name, rest = re.compile('([^!><= \(\)\[]+)(.*)').match(req).groups()
# TODO: check stdlib and dist-packaged for name.py and name.so files
req = safe_name(name) + rest
data = load(impl)
req_d = REQUIRES_RE.match(req)
if not req_d:
log.info('please ask dh_python3 author to fix REQUIRES_RE '
'or your upstream author to fix requires.txt')
raise Exception('requirement is not valid: %s' % req)
req_d = req_d.groupdict()
name = req_d['name']
details = data.get(name.lower())
if details:
for item in details:
if version and version not in item.get('versions', version):
# rule doesn't match version, try next one
continue
if not item['dependency']:
return # this requirement should be ignored
if item['dependency'].endswith(')'):
# no need to translate versions if version is hardcoded in
# Debian dependency
return item['dependency']
if req_d['version'] and (item['standard'] or item['rules']) and\
req_d['operator'] not in (None, '==', '!='):
v = _translate(req_d['version'], item['rules'], item['standard'])
return "%s (%s %s)" % (item['dependency'], req_d['operator'], v)
else:
return item['dependency']
# search for Egg metadata file or directory (using dpkg -S)
query = PYDIST_DPKG_SEARCH_TPLS[impl].format(ci_regexp(safe_name(name)))
log.debug("invoking dpkg -S %s", query)
process = Popen("/usr/bin/dpkg -S %s" % query,
shell=True, stdout=PIPE, stderr=PIPE)
stdout, stderr = process.communicate()
if process.returncode == 0:
result = set()
stdout = str(stdout, 'utf-8')
for line in stdout.split('\n'):
if not line.strip():
continue
result.add(line.split(':')[0])
if len(result) > 1:
log.error('more than one package name found for %s dist', name)
else:
return result.pop()
else:
log.debug('dpkg -S did not find package for %s: %s', name, stderr)
pname = sensible_pname(impl, name)
log.info('Cannot find package that provides %s. '
'Please add package that provides it to Build-Depends or '
'add "%s %s" line to %s or add proper '
' dependency to Depends by hand and ignore this info.',
name, safe_name(name), pname, PYDIST_OVERRIDES_FNAMES[impl])
# return pname
def parse_pydep(impl, fname):
public_dir = PUBLIC_DIR_RE[impl].match(fname)
ver = None
if public_dir and public_dir.groups() and len(public_dir.group(1)) != 1:
ver = public_dir.group(1)
result = []
modified = optional_section = False
processed = []
with open(fname, 'r', encoding='utf-8') as fp:
for line in fp:
line = line.strip()
if not line or line.startswith('#'):
processed.append(line)
continue
if line.startswith('['):
optional_section = True
if optional_section:
processed.append(line)
continue
dependency = guess_dependency(impl, line, ver)
if dependency:
result.append(dependency)
modified = True
else:
processed.append(line)
if modified:
with open(fname, 'w', encoding='utf-8') as fp:
fp.writelines(i + '\n' for i in processed)
return result
def safe_name(name):
"""Emulate distribute's safe_name."""
return re.compile('[^A-Za-z0-9.]+').sub('_', name).lower()
def sensible_pname(impl, egg_name):
"""Guess Debian package name from Egg name."""
egg_name = safe_name(egg_name).replace('_', '-')
if egg_name.startswith('python-'):
egg_name = egg_name[7:]
return '{}-{}'.format(PKG_PREFIX_MAP[impl], egg_name.lower())
def ci_regexp(name):
"""Return case insensitive dpkg -S regexp."""
return ''.join("[%s%s]" % (i.upper(), i) if i.isalpha() else i for i in name.lower())
PRE_VER_RE = re.compile(r'[-.]?(alpha|beta|rc|dev|a|b|c)')
GROUP_RE = re.compile(r'\$(\d+)')
def _pl2py(pattern):
"""Convert Perl RE patterns used in uscan to Python's
>>> print(_pl2py('foo$3'))
foo\g<3>
"""
return GROUP_RE.sub(r'\\g<\1>', pattern)
def _translate(version, rules, standard):
"""Translate Python version into Debian one.
>>> _translate('1.C2betac', ['s/c//gi'], None)
'1.2beta'
>>> _translate('5-fooa1.2beta3-fooD',
... ['s/^/1:/', 's/-foo//g', 's:([A-Z]):+$1:'], 'PEP386')
'1:5~a1.2~beta3+D'
>>> _translate('x.y.x.z', ['tr/xy/ab/', 'y,z,Z,'], None)
'a.b.a.Z'
"""
for rule in rules:
# uscan supports s, tr and y operations
if rule.startswith(('tr', 'y')):
# Note: no support for escaped separator in the pattern
pos = 1 if rule.startswith('y') else 2
tmp = rule[pos + 1:].split(rule[pos])
version = version.translate(str.maketrans(tmp[0], tmp[1]))
elif rule.startswith('s'):
# uscan supports: g, u and x flags
tmp = rule[2:].split(rule[1])
pattern = re.compile(tmp[0])
count = 1
if tmp[2:]:
flags = tmp[2]
if 'g' in flags:
count = 0
if 'i' in flags:
pattern = re.compile(tmp[0], re.I)
version = pattern.sub(_pl2py(tmp[1]), version, count)
else:
log.warn('unknown rule ignored: %s', rule)
if standard == 'PEP386':
version = PRE_VER_RE.sub(r'~\g<1>', version)
return version
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