| | |
| | 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() |
| | |
| |
|
| | founds = discover_lxml(executable=executable) |
| | founds = log_discovered('matching', founds, EXPOSE_NAMES, |
| | log=logger.info) |
| | founds = list(founds) |
| |
|
| | |
| | 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 |
| |
|
| | |
| | expose_options(options, ['location'], dict(), not_found=not_found, |
| | logger=logger) |
| | logger.warning('lxml not found') |
| | return |
| |
|
| | def install(self): |
| | return [] |
| |
|
| | update = install |
| |
|
