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import os
import sys
import imp
import portage
from portage.const import VDB_PATH
from portage import _encodings
from portage import _shell_quote
from portage import _unicode_decode
from portage import _unicode_encode
# Stolen from the ebuild command
def package_from_ebuild(ebuild):
pf = None
if ebuild.endswith(".ebuild"):
pf = os.path.basename(ebuild)[:-7]
else:
return False
if not os.path.isabs(ebuild):
mycwd = os.getcwd()
# Try to get the non-canonical path from the PWD evironment variable,
# since the canonical path returned from os.getcwd() may may be
# unusable in cases where the directory stucture is built from
# symlinks.
pwd = os.environ.get('PWD', '')
if sys.hexversion < 0x3000000:
pwd = _unicode_decode(pwd, encoding=_encodings['content'],
errors='strict')
if pwd and pwd != mycwd and \
os.path.realpath(pwd) == mycwd:
mycwd = portage.normalize_path(pwd)
ebuild = os.path.join(mycwd, ebuild)
ebuild = portage.normalize_path(ebuild)
# portdbapi uses the canonical path for the base of the portage tree, but
# subdirectories of the base can be built from symlinks (like crossdev
# does).
ebuild_portdir = os.path.realpath(
os.path.dirname(os.path.dirname(os.path.dirname(ebuild))))
ebuild = os.path.join(ebuild_portdir, *ebuild.split(os.path.sep)[-3:])
vdb_path = os.path.join(portage.settings['ROOT'], VDB_PATH)
# Make sure that portdb.findname() returns the correct ebuild.
if ebuild_portdir != vdb_path and \
ebuild_portdir not in portage.portdb.porttrees:
if sys.hexversion >= 0x3000000:
os.environ["PORTDIR_OVERLAY"] = \
os.environ.get("PORTDIR_OVERLAY", "") + \
" " + _shell_quote(ebuild_portdir)
else:
os.environ["PORTDIR_OVERLAY"] = \
os.environ.get("PORTDIR_OVERLAY", "") + \
" " + _unicode_encode(_shell_quote(ebuild_portdir),
encoding=_encodings['content'], errors='strict')
portage.close_portdbapi_caches()
imp.reload(portage)
del portage.portdb.porttrees[1:]
if ebuild_portdir != portage.portdb.porttree_root:
portage.portdb.porttrees.append(ebuild_portdir)
if not os.path.exists(ebuild):
return False
ebuild_split = ebuild.split("/")
cpv = "%s/%s" % (ebuild_split[-3], pf)
if not portage.catpkgsplit(cpv):
return False
if ebuild.startswith(os.path.join(portage.root, portage.const.VDB_PATH)):
mytree = "vartree"
portage_ebuild = portage.db[portage.root][mytree].dbapi.findname(cpv)
if os.path.realpath(portage_ebuild) != ebuild:
return False
else:
mytree = "porttree"
portage_ebuild = portage.portdb.findname(cpv)
if not portage_ebuild or portage_ebuild != ebuild:
return False
return cpv
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