384 lines
10 KiB
Python
Executable File
384 lines
10 KiB
Python
Executable File
#!/usr/bin/env python
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import math
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import os
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import shutil
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import sys
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import tempfile
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from subprocess import call
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_is_win = sys.platform == 'win32'
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if not _is_win:
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sys.stdin = open('/dev/tty', 'r')
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if sys.version_info[0] == 2:
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input = raw_input
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prompt = os.environ.get('LEKTOR_SILENT') is None
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def get_confirmation():
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if prompt is False:
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return
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while True:
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user_input = input('Continue? [Yn] ').lower().strip()
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if user_input in ('', 'y'):
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print('')
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return
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if user_input == 'n':
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print('')
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print('Aborted!')
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sys.exit()
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def fail(message):
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print('Error: %s' % message)
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sys.exit(1)
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def multiprint(*lines):
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for line in lines:
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print(line)
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class Installer(object):
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APP_NAME = 'lektor'
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VIRTUALENV_URL = 'https://bootstrap.pypa.io/virtualenv.pyz'
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def __init__(self):
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multiprint('',
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'Welcome to Lektor',
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'',
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'This script will install Lektor on your computer.',
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'')
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self.compute_location()
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self.prompt_installation()
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get_confirmation()
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if self.check_installation():
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self.prompt_wipe()
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get_confirmation()
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self.wipe_installation()
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self.create_virtualenv()
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self.install_lektor()
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multiprint('',
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'All done!')
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def compute_location(self):
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# this method must set self.lib_dir
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raise NotImplementedError()
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def check_installation(self):
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raise NotImplementedError()
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def wipe_installation(self):
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raise NotImplementedError()
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def prompt_installation(self):
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raise NotImplementedError()
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def prompt_wipe(self):
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raise NotImplementedError()
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def create_virtualenv(self):
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self.mkvirtualenv(self.lib_dir)
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def install_lektor(self):
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call([self.get_pip(), 'install', '--upgrade', 'Lektor'])
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def get_pip(self):
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raise NotImplementedError()
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@classmethod
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def mkvirtualenv(cls, target_dir):
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"""
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Tries to create a virtualenv by using the built-in `venv` module,
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or using the `virtualenv` executable if present, or falling back
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to downloading the official zipapp.
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"""
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created = False
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try:
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from venv import EnvBuilder
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except ImportError:
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pass
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else:
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try:
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# TODO: design decision needed:
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# on Debian and Ubuntu systems Python is missing `ensurepip`,
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# prompting the user to install `python3-venv` instead.
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# we could do the same, or go the download route...
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import ensurepip
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except ImportError:
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pass
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else:
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venv = EnvBuilder(with_pip=True,
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symlinks=False if _is_win else True)
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venv.create(target_dir)
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created = True
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if not created:
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try:
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from shutil import which
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except ImportError:
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from distutils.spawn import find_executable as which
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venv_exec = which("virtualenv")
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if venv_exec:
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retval = call([venv_exec, '-p', sys.executable, target_dir])
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if retval:
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sys.exit(1)
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created = True
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if not created:
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zipapp = cls.fetch_virtualenv()
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retval = call([sys.executable, zipapp, target_dir])
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os.unlink(zipapp)
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if retval:
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sys.exit(1)
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@classmethod
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def fetch_virtualenv(cls):
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try:
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from urllib.request import urlretrieve
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except ImportError:
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from urllib import urlretrieve
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fname = os.path.basename(cls.VIRTUALENV_URL)
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root, ext = os.path.splitext(fname)
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zipapp = tempfile.mktemp(prefix=root+"-", suffix=ext)
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with Progress() as hook:
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sys.stdout.write("Downloading virtualenv: ")
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urlretrieve(cls.VIRTUALENV_URL, zipapp, reporthook=hook)
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return zipapp
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@staticmethod
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def deletion_error(func, path, excinfo):
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print('Problem deleting {}'.format(path))
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print('Please try and delete {} manually'.format(path))
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print('Aborted!')
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sys.exit(1)
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_home = os.environ.get('HOME')
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class PosixInstaller(Installer):
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KNOWN_BIN_PATHS = ['/usr/local/bin', '/opt/local/bin']
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if _home: # this is always true, but it needs not blow up on windows
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KNOWN_BIN_PATHS.extend([
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os.path.join(_home, '.bin'),
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os.path.join(_home, '.local', 'bin'),
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])
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def prompt_installation(self):
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multiprint('Installing at:',
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' bin: %s' % self.bin_dir,
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' app: %s' % self.lib_dir,
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'')
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def prompt_wipe(self):
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multiprint('Lektor seems to be installed already.',
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'Continuing will delete:',
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' %s' % self.lib_dir,
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'and remove this symlink:',
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' %s' % self.symlink_path,
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'')
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def compute_location(self):
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"""
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Finds the preferred directory in the user's $PATH,
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and derives the lib dir from it.
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"""
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paths = [
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item for item in os.environ['PATH'].split(':')
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if not item.endswith('/sbin') and os.access(item, os.W_OK)
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]
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if not paths:
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fail('None of the items in $PATH are writable. Run with '
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'sudo or add a $PATH item that you have access to.')
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def _sorter(path):
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try:
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return self.KNOWN_BIN_PATHS.index(path)
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except ValueError:
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return float('inf')
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paths.sort(key=_sorter)
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lib_dir = None
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home = os.environ['HOME']
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for path in paths:
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if path.startswith(home):
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lib_dir = os.path.join(home, '.local', 'lib', self.APP_NAME)
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break
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if path.endswith('/bin'):
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parent = os.path.dirname(path)
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lib_dir = os.path.join(parent, 'lib', self.APP_NAME)
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break
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if lib_dir is None:
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fail('Could not determine installation location for Lektor.')
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self.bin_dir = path
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self.lib_dir = lib_dir
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@property
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def symlink_path(self):
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return os.path.join(self.bin_dir, self.APP_NAME)
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def check_installation(self):
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return os.path.exists(self.lib_dir) \
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or os.path.lexists(self.symlink_path)
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def wipe_installation(self):
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if os.path.lexists(self.symlink_path):
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os.remove(self.symlink_path)
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if os.path.exists(self.lib_dir):
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shutil.rmtree(self.lib_dir, onerror=self.deletion_error)
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def get_pip(self):
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return os.path.join(self.lib_dir, 'bin', 'pip')
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def install_lektor(self):
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import pdb
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super(PosixInstaller, self).install_lektor()
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bin = os.path.join(self.lib_dir, 'bin', 'lektor')
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os.symlink(bin, self.symlink_path)
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class WindowsInstaller(Installer):
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APP_NAME = 'lektor-cli' # backwards-compatibility with previous installer
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LIB_DIR = 'lib'
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def prompt_installation(self):
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multiprint('Installing at:',
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' %s' % self.install_dir,
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'')
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def prompt_wipe(self):
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multiprint('Lektor seems to be installed already.',
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'Continuing will delete:',
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' %s' % self.install_dir,
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'')
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def compute_location(self):
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install_dir = os.path.join(os.environ['LocalAppData'], self.APP_NAME)
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lib_dir = os.path.join(install_dir, self.LIB_DIR)
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self.install_dir = install_dir
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self.lib_dir = lib_dir
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def check_installation(self):
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return os.path.exists(self.install_dir)
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def wipe_installation(self):
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shutil.rmtree(self.install_dir, onerror=self.deletion_error)
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def get_pip(self):
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return os.path.join(self.lib_dir, 'Scripts', 'pip.exe')
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def install_lektor(self):
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super(WindowsInstaller, self).install_lektor()
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exe = os.path.join(self.lib_dir, 'Scripts', 'lektor.exe')
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link = os.path.join(self.install_dir, 'lektor.cmd')
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with open(link, 'w') as link_file:
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link_file.write('@echo off\n')
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link_file.write('"%s" %%*' % exe)
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self.add_to_path(self.install_dir)
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@staticmethod
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def add_to_path(location):
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try:
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from winreg import (
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OpenKey, CloseKey, QueryValueEx, SetValueEx,
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HKEY_CURRENT_USER, KEY_ALL_ACCESS, REG_EXPAND_SZ,
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)
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except ImportError: # py2
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from _winreg import (
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OpenKey, CloseKey, QueryValueEx, SetValueEx,
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HKEY_CURRENT_USER, KEY_ALL_ACCESS, REG_EXPAND_SZ,
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)
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import ctypes
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from ctypes.wintypes import HWND, UINT, WPARAM, LPARAM, LPVOID
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HWND_BROADCAST = 0xFFFF
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WM_SETTINGCHANGE = 0x1A
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reg_key = OpenKey(HKEY_CURRENT_USER, 'Environment', 0, KEY_ALL_ACCESS)
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try:
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path_value, _ = QueryValueEx(reg_key, 'Path')
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except WindowsError:
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path_value = ''
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paths = path_value.split(';')
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if location not in paths:
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paths.append(location)
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path_value = ';'.join(paths)
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SetValueEx(reg_key, 'Path', 0, REG_EXPAND_SZ, path_value)
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SendMessage = ctypes.windll.user32.SendMessageW
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SendMessage.argtypes = HWND, UINT, WPARAM, LPVOID
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SendMessage.restype = LPARAM
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SendMessage(HWND_BROADCAST, WM_SETTINGCHANGE, 0, u'Environment')
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class Progress(object):
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"A context manager to be used as a urlretrieve reporthook."
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def __init__(self):
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self.started = False
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def progress(self, count, bsize, total):
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size = count * bsize
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if size > total:
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progress = 100
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else:
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progress = math.floor(100 * size / total)
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out = sys.stdout
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if self.started:
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out.write("\b" * 4)
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out.write("%3d" % progress + "%")
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out.flush()
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self.started = True
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def finish(self):
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sys.stdout.write("\n")
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def __enter__(self):
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return self.progress
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def __exit__(self, exc_type, exc_value, traceback):
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self.finish()
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install = WindowsInstaller if _is_win \
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else PosixInstaller
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if __name__ == '__main__':
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install()
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