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417 lines
17 KiB
Python
417 lines
17 KiB
Python
5 years ago
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2013-2015 Vinay Sajip.
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# Licensed to the Python Software Foundation under a contributor agreement.
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# See LICENSE.txt and CONTRIBUTORS.txt.
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#
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from io import BytesIO
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import logging
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import os
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import re
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import struct
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import sys
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from .compat import sysconfig, detect_encoding, ZipFile
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from .resources import finder
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from .util import (FileOperator, get_export_entry, convert_path,
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get_executable, in_venv)
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logger = logging.getLogger(__name__)
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_DEFAULT_MANIFEST = '''
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
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<assemblyIdentity version="1.0.0.0"
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processorArchitecture="X86"
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name="%s"
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type="win32"/>
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<!-- Identify the application security requirements. -->
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<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
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<security>
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<requestedPrivileges>
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<requestedExecutionLevel level="asInvoker" uiAccess="false"/>
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</requestedPrivileges>
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</security>
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</trustInfo>
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</assembly>'''.strip()
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# check if Python is called on the first line with this expression
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FIRST_LINE_RE = re.compile(b'^#!.*pythonw?[0-9.]*([ \t].*)?$')
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SCRIPT_TEMPLATE = r'''# -*- coding: utf-8 -*-
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import re
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import sys
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from %(module)s import %(import_name)s
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if __name__ == '__main__':
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sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
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sys.exit(%(func)s())
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'''
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def _enquote_executable(executable):
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if ' ' in executable:
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# make sure we quote only the executable in case of env
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# for example /usr/bin/env "/dir with spaces/bin/jython"
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# instead of "/usr/bin/env /dir with spaces/bin/jython"
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# otherwise whole
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if executable.startswith('/usr/bin/env '):
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env, _executable = executable.split(' ', 1)
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if ' ' in _executable and not _executable.startswith('"'):
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executable = '%s "%s"' % (env, _executable)
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else:
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if not executable.startswith('"'):
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executable = '"%s"' % executable
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return executable
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class ScriptMaker(object):
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"""
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A class to copy or create scripts from source scripts or callable
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specifications.
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"""
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script_template = SCRIPT_TEMPLATE
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executable = None # for shebangs
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def __init__(self, source_dir, target_dir, add_launchers=True,
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dry_run=False, fileop=None):
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self.source_dir = source_dir
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self.target_dir = target_dir
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self.add_launchers = add_launchers
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self.force = False
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self.clobber = False
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# It only makes sense to set mode bits on POSIX.
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self.set_mode = (os.name == 'posix') or (os.name == 'java' and
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os._name == 'posix')
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self.variants = set(('', 'X.Y'))
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self._fileop = fileop or FileOperator(dry_run)
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self._is_nt = os.name == 'nt' or (
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os.name == 'java' and os._name == 'nt')
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def _get_alternate_executable(self, executable, options):
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if options.get('gui', False) and self._is_nt: # pragma: no cover
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dn, fn = os.path.split(executable)
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fn = fn.replace('python', 'pythonw')
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executable = os.path.join(dn, fn)
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return executable
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if sys.platform.startswith('java'): # pragma: no cover
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def _is_shell(self, executable):
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"""
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Determine if the specified executable is a script
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(contains a #! line)
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"""
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try:
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with open(executable) as fp:
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return fp.read(2) == '#!'
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except (OSError, IOError):
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logger.warning('Failed to open %s', executable)
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return False
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def _fix_jython_executable(self, executable):
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if self._is_shell(executable):
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# Workaround for Jython is not needed on Linux systems.
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import java
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if java.lang.System.getProperty('os.name') == 'Linux':
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return executable
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elif executable.lower().endswith('jython.exe'):
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# Use wrapper exe for Jython on Windows
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return executable
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return '/usr/bin/env %s' % executable
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def _build_shebang(self, executable, post_interp):
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"""
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Build a shebang line. In the simple case (on Windows, or a shebang line
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which is not too long or contains spaces) use a simple formulation for
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the shebang. Otherwise, use /bin/sh as the executable, with a contrived
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shebang which allows the script to run either under Python or sh, using
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suitable quoting. Thanks to Harald Nordgren for his input.
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See also: http://www.in-ulm.de/~mascheck/various/shebang/#length
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https://hg.mozilla.org/mozilla-central/file/tip/mach
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"""
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if os.name != 'posix':
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simple_shebang = True
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else:
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# Add 3 for '#!' prefix and newline suffix.
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shebang_length = len(executable) + len(post_interp) + 3
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if sys.platform == 'darwin':
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max_shebang_length = 512
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else:
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max_shebang_length = 127
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simple_shebang = ((b' ' not in executable) and
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(shebang_length <= max_shebang_length))
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if simple_shebang:
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result = b'#!' + executable + post_interp + b'\n'
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else:
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result = b'#!/bin/sh\n'
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result += b"'''exec' " + executable + post_interp + b' "$0" "$@"\n'
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result += b"' '''"
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return result
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def _get_shebang(self, encoding, post_interp=b'', options=None):
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enquote = True
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if self.executable:
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executable = self.executable
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enquote = False # assume this will be taken care of
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elif not sysconfig.is_python_build():
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executable = get_executable()
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elif in_venv(): # pragma: no cover
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executable = os.path.join(sysconfig.get_path('scripts'),
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'python%s' % sysconfig.get_config_var('EXE'))
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else: # pragma: no cover
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executable = os.path.join(
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sysconfig.get_config_var('BINDIR'),
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'python%s%s' % (sysconfig.get_config_var('VERSION'),
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sysconfig.get_config_var('EXE')))
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if options:
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executable = self._get_alternate_executable(executable, options)
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if sys.platform.startswith('java'): # pragma: no cover
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executable = self._fix_jython_executable(executable)
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# Normalise case for Windows - COMMENTED OUT
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# executable = os.path.normcase(executable)
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# N.B. The normalising operation above has been commented out: See
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# issue #124. Although paths in Windows are generally case-insensitive,
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# they aren't always. For example, a path containing a ẞ (which is a
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# LATIN CAPITAL LETTER SHARP S - U+1E9E) is normcased to ß (which is a
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# LATIN SMALL LETTER SHARP S' - U+00DF). The two are not considered by
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# Windows as equivalent in path names.
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# If the user didn't specify an executable, it may be necessary to
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# cater for executable paths with spaces (not uncommon on Windows)
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if enquote:
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executable = _enquote_executable(executable)
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# Issue #51: don't use fsencode, since we later try to
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# check that the shebang is decodable using utf-8.
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executable = executable.encode('utf-8')
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# in case of IronPython, play safe and enable frames support
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if (sys.platform == 'cli' and '-X:Frames' not in post_interp
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and '-X:FullFrames' not in post_interp): # pragma: no cover
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post_interp += b' -X:Frames'
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shebang = self._build_shebang(executable, post_interp)
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# Python parser starts to read a script using UTF-8 until
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# it gets a #coding:xxx cookie. The shebang has to be the
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# first line of a file, the #coding:xxx cookie cannot be
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# written before. So the shebang has to be decodable from
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# UTF-8.
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try:
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shebang.decode('utf-8')
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except UnicodeDecodeError: # pragma: no cover
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raise ValueError(
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'The shebang (%r) is not decodable from utf-8' % shebang)
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# If the script is encoded to a custom encoding (use a
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# #coding:xxx cookie), the shebang has to be decodable from
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# the script encoding too.
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if encoding != 'utf-8':
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try:
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shebang.decode(encoding)
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except UnicodeDecodeError: # pragma: no cover
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raise ValueError(
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'The shebang (%r) is not decodable '
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'from the script encoding (%r)' % (shebang, encoding))
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return shebang
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def _get_script_text(self, entry):
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return self.script_template % dict(module=entry.prefix,
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import_name=entry.suffix.split('.')[0],
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func=entry.suffix)
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manifest = _DEFAULT_MANIFEST
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def get_manifest(self, exename):
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base = os.path.basename(exename)
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return self.manifest % base
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def _write_script(self, names, shebang, script_bytes, filenames, ext):
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use_launcher = self.add_launchers and self._is_nt
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linesep = os.linesep.encode('utf-8')
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if not shebang.endswith(linesep):
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shebang += linesep
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if not use_launcher:
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script_bytes = shebang + script_bytes
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else: # pragma: no cover
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if ext == 'py':
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launcher = self._get_launcher('t')
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else:
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launcher = self._get_launcher('w')
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stream = BytesIO()
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with ZipFile(stream, 'w') as zf:
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zf.writestr('__main__.py', script_bytes)
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zip_data = stream.getvalue()
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script_bytes = launcher + shebang + zip_data
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for name in names:
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outname = os.path.join(self.target_dir, name)
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if use_launcher: # pragma: no cover
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n, e = os.path.splitext(outname)
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if e.startswith('.py'):
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outname = n
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outname = '%s.exe' % outname
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try:
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self._fileop.write_binary_file(outname, script_bytes)
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except Exception:
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# Failed writing an executable - it might be in use.
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logger.warning('Failed to write executable - trying to '
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'use .deleteme logic')
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dfname = '%s.deleteme' % outname
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if os.path.exists(dfname):
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os.remove(dfname) # Not allowed to fail here
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os.rename(outname, dfname) # nor here
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self._fileop.write_binary_file(outname, script_bytes)
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logger.debug('Able to replace executable using '
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'.deleteme logic')
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try:
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os.remove(dfname)
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except Exception:
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pass # still in use - ignore error
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else:
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if self._is_nt and not outname.endswith('.' + ext): # pragma: no cover
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outname = '%s.%s' % (outname, ext)
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if os.path.exists(outname) and not self.clobber:
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logger.warning('Skipping existing file %s', outname)
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continue
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self._fileop.write_binary_file(outname, script_bytes)
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if self.set_mode:
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self._fileop.set_executable_mode([outname])
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filenames.append(outname)
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def _make_script(self, entry, filenames, options=None):
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post_interp = b''
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if options:
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args = options.get('interpreter_args', [])
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if args:
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args = ' %s' % ' '.join(args)
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post_interp = args.encode('utf-8')
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shebang = self._get_shebang('utf-8', post_interp, options=options)
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script = self._get_script_text(entry).encode('utf-8')
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name = entry.name
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scriptnames = set()
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if '' in self.variants:
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scriptnames.add(name)
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if 'X' in self.variants:
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scriptnames.add('%s%s' % (name, sys.version_info[0]))
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if 'X.Y' in self.variants:
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scriptnames.add('%s-%s.%s' % (name, sys.version_info[0],
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sys.version_info[1]))
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if options and options.get('gui', False):
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ext = 'pyw'
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else:
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ext = 'py'
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self._write_script(scriptnames, shebang, script, filenames, ext)
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def _copy_script(self, script, filenames):
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adjust = False
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script = os.path.join(self.source_dir, convert_path(script))
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outname = os.path.join(self.target_dir, os.path.basename(script))
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if not self.force and not self._fileop.newer(script, outname):
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logger.debug('not copying %s (up-to-date)', script)
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return
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# Always open the file, but ignore failures in dry-run mode --
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# that way, we'll get accurate feedback if we can read the
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# script.
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try:
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f = open(script, 'rb')
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except IOError: # pragma: no cover
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if not self.dry_run:
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raise
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f = None
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else:
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first_line = f.readline()
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if not first_line: # pragma: no cover
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logger.warning('%s: %s is an empty file (skipping)',
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self.get_command_name(), script)
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return
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match = FIRST_LINE_RE.match(first_line.replace(b'\r\n', b'\n'))
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if match:
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adjust = True
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post_interp = match.group(1) or b''
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if not adjust:
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if f:
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f.close()
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self._fileop.copy_file(script, outname)
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if self.set_mode:
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self._fileop.set_executable_mode([outname])
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filenames.append(outname)
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else:
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logger.info('copying and adjusting %s -> %s', script,
|
||
|
|
self.target_dir)
|
||
|
|
if not self._fileop.dry_run:
|
||
|
|
encoding, lines = detect_encoding(f.readline)
|
||
|
|
f.seek(0)
|
||
|
|
shebang = self._get_shebang(encoding, post_interp)
|
||
|
|
if b'pythonw' in first_line: # pragma: no cover
|
||
|
|
ext = 'pyw'
|
||
|
|
else:
|
||
|
|
ext = 'py'
|
||
|
|
n = os.path.basename(outname)
|
||
|
|
self._write_script([n], shebang, f.read(), filenames, ext)
|
||
|
|
if f:
|
||
|
|
f.close()
|
||
|
|
|
||
|
|
@property
|
||
|
|
def dry_run(self):
|
||
|
|
return self._fileop.dry_run
|
||
|
|
|
||
|
|
@dry_run.setter
|
||
|
|
def dry_run(self, value):
|
||
|
|
self._fileop.dry_run = value
|
||
|
|
|
||
|
|
if os.name == 'nt' or (os.name == 'java' and os._name == 'nt'): # pragma: no cover
|
||
|
|
# Executable launcher support.
|
||
|
|
# Launchers are from https://bitbucket.org/vinay.sajip/simple_launcher/
|
||
|
|
|
||
|
|
def _get_launcher(self, kind):
|
||
|
|
if struct.calcsize('P') == 8: # 64-bit
|
||
|
|
bits = '64'
|
||
|
|
else:
|
||
|
|
bits = '32'
|
||
|
|
name = '%s%s.exe' % (kind, bits)
|
||
|
|
# Issue 31: don't hardcode an absolute package name, but
|
||
|
|
# determine it relative to the current package
|
||
|
|
distlib_package = __name__.rsplit('.', 1)[0]
|
||
|
|
resource = finder(distlib_package).find(name)
|
||
|
|
if not resource:
|
||
|
|
msg = ('Unable to find resource %s in package %s' % (name,
|
||
|
|
distlib_package))
|
||
|
|
raise ValueError(msg)
|
||
|
|
return resource.bytes
|
||
|
|
|
||
|
|
# Public API follows
|
||
|
|
|
||
|
|
def make(self, specification, options=None):
|
||
|
|
"""
|
||
|
|
Make a script.
|
||
|
|
|
||
|
|
:param specification: The specification, which is either a valid export
|
||
|
|
entry specification (to make a script from a
|
||
|
|
callable) or a filename (to make a script by
|
||
|
|
copying from a source location).
|
||
|
|
:param options: A dictionary of options controlling script generation.
|
||
|
|
:return: A list of all absolute pathnames written to.
|
||
|
|
"""
|
||
|
|
filenames = []
|
||
|
|
entry = get_export_entry(specification)
|
||
|
|
if entry is None:
|
||
|
|
self._copy_script(specification, filenames)
|
||
|
|
else:
|
||
|
|
self._make_script(entry, filenames, options=options)
|
||
|
|
return filenames
|
||
|
|
|
||
|
|
def make_multiple(self, specifications, options=None):
|
||
|
|
"""
|
||
|
|
Take a list of specifications and make scripts from them,
|
||
|
|
:param specifications: A list of specifications.
|
||
|
|
:return: A list of all absolute pathnames written to,
|
||
|
|
"""
|
||
|
|
filenames = []
|
||
|
|
for specification in specifications:
|
||
|
|
filenames.extend(self.make(specification, options))
|
||
|
|
return filenames
|