File size: 3,155 Bytes
a65138c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | # -*- coding: utf-8 -*-
from __future__ import with_statement
import logging
import os
import os.path
import sys
from discover_python import expose_options
from discover_python import log_discovered
logger = logging.getLogger(__name__)
EXPOSE_NAMES = ('location', 'version')
FIND_SOURCE = '''
import os
import os.path
import sys
try:
from pkg_resources import get_distribution
except ImportError:
sys.stderr.write('pkg_resources is not found' + os.linesep)
try:
import lxml
except ImportError:
sys.stderr.write('lxml is not found' + os.linesep)
raise SystemExit(1)
else:
print(os.path.dirname(lxml.__path__[0]))
print('')
raise SystemExit(0)
try:
dist = get_distribution('lxml')
except Exception:
e = sys.exc_info()[1]
sys.stderr.write(repr(e))
sys.stderr.write(os.linesep)
raise SystemExit(1)
else:
print(dist.location)
print(dist.version)
'''
def discover_lxml(executable):
import tempfile
fd, path = tempfile.mkstemp()
try:
with os.fdopen(fd, 'w') as f:
f.write(FIND_SOURCE)
from subprocess import Popen
from subprocess import PIPE
args = [executable, path]
env = dict(os.environ)
for k in ('PYTHONPATH', 'PYTHONHOME'):
if k in env:
del env[k]
try:
p = Popen(args, stdout=PIPE, env=env)
except Exception:
e = sys.exc_info()[1]
logger.exception(e)
return
else:
try:
lines = list(p.stdout)
finally:
p.wait()
finally:
os.unlink(path)
if p.returncode == 0:
location = lines[0].strip()
version = lines[1].strip()
yield dict(location=location,
version=version)
class DiscoverRecipe(object):
''' Discover lxml and provide its location.
'''
def __init__(self, buildout, name, options):
self.__logger = logger = logging.getLogger(name)
for k, v in options.items():
logger.info('%s: %r', k, v)
self.__recipe = options['recipe']
not_found = options.get('not-found', 'not-found')
executable = options.get('python', 'python').strip()
#version = options.get('version', '').strip()
founds = discover_lxml(executable=executable)
founds = log_discovered('matching', founds, EXPOSE_NAMES,
log=logger.info)
founds = list(founds)
# location is not specified: try to discover a Python installation
if founds:
found = founds[0]
logger.info('the first-found one will be used:')
expose_options(options, EXPOSE_NAMES, found,
not_found=not_found, logger=logger)
return
# ensure executable publishes not-found marker
expose_options(options, ['location'], dict(), not_found=not_found,
logger=logger)
logger.warning('lxml not found')
return
def install(self):
return []
update = install
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