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Submitting new feature, "--fixup" option to fix a virtualenv without moving it #3

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Submitting new feature, "--fixup" option to fix a virtualenv without moving it #3

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53 changes: 36 additions & 17 deletions clonevirtualenv.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
#!/opt/python27/bin/python
from __future__ import with_statement
import logging
import optparse
Expand All @@ -11,7 +12,7 @@


logger = logging.getLogger()

ONLY_FIXUP=False

class UserError(Exception):
pass
Expand Down Expand Up @@ -41,7 +42,7 @@ def _dirmatch(path, matchwith):
def _virtualenv_sys(venv_path):
"obtain version and path info from a virtualenv."
executable = os.path.join(venv_path, 'bin', 'python')
p = subprocess.Popen(['python',
p = subprocess.Popen([executable,
'-c', 'import sys;'
'print sys.version[:3];'
'print "\\n".join(sys.path);'],
Expand All @@ -55,27 +56,38 @@ def _virtualenv_sys(venv_path):


def clone_virtualenv(src_dir, dst_dir):
global ONLY_FIXUP
if not os.path.exists(src_dir):
raise UserError('src dir %r does not exist' % src_dir)
if os.path.exists(dst_dir):
if (not ONLY_FIXUP) and os.path.exists(dst_dir):
raise UserError('dest dir %r exists' % dst_dir)
#sys_path = _virtualenv_syspath(src_dir)
shutil.copytree(src_dir, dst_dir, symlinks=True)
version, sys_path = _virtualenv_sys(dst_dir)
if not ONLY_FIXUP:
shutil.copytree(src_dir, dst_dir, symlinks=True)
if ONLY_FIXUP:
version, sys_path = _virtualenv_sys(src_dir)
else:
version, sys_path = _virtualenv_sys(dst_dir)
fixup_scripts(src_dir, dst_dir, version)

has_old = lambda s: any(i for i in s if _dirmatch(i, src_dir))

if has_old(sys_path):
# only need to fix stuff in sys.path if we have old
# paths in the sys.path of new python env. right?
fixup_syspath_items(sys_path, src_dir, dst_dir)
remaining = has_old(_virtualenv_sys(dst_dir)[1])
assert not remaining, _virtualenv_sys(dst_dir)
#if has_old(sys_path):
# only need to fix stuff in sys.path if we have old
# paths in the sys.path of new python env. right?
fixup_syspath_items(sys_path, src_dir, dst_dir)
if ONLY_FIXUP:
remaining = has_old(_virtualenv_sys(src_dir)[1])
else:
remaining = has_old(_virtualenv_sys(dst_dir)[1])
assert not remaining, _virtualenv_sys(dst_dir)


def fixup_scripts(old_dir, new_dir, version, rewrite_env_python=False):
bin_dir = os.path.join(new_dir, 'bin')
if ONLY_FIXUP:
bin_dir = os.path.join(old_dir, 'bin')
else:
bin_dir = os.path.join(new_dir, 'bin')
root, dirs, files = os.walk(bin_dir).next()
for file_ in files:
filename = os.path.join(root, file_)
Expand Down Expand Up @@ -224,13 +236,20 @@ def fixup_egglink_file(filename, old_dir, new_dir):


def main():
parser = optparse.OptionParser("usage: %prog /path/to/existing/venv"
" /path/to/cloned/venv")
global ONLY_FIXUP
parser = optparse.OptionParser("usage: %prog --source /path/to/existing/venv"
" --dest /path/to/cloned/venv [--fixup] ")
parser.add_option("--fixup", dest="fixup", default=False, action="store_true",
help=("Do not copy files, only fixup the files in the "
"given source env to point to the new destination"))
parser.add_option("--source", dest="source", default="")
parser.add_option("--dest", dest="dest", default="")
options, args = parser.parse_args()
try:
old_dir, new_dir = sys.argv[1:]
except ValueError, e:
old_dir = options.source
new_dir = options.dest
if not old_dir or not new_dir:
parser.error("not enough arguments given.")
ONLY_FIXUP = options.fixup
old_dir = os.path.normpath(os.path.abspath(old_dir))
new_dir = os.path.normpath(os.path.abspath(new_dir))
logging.basicConfig(level=logging.WARNING)
Expand Down