import codecs
import json
import os
import pipes
import re
import sys
import warnings
from itertools import chain
import py
from pkg_resources import to_filename
import tox
from .config import DepConfig
class CreationConfig:
def __init__(
self,
base_resolved_python_md5,
base_resolved_python_path,
tox_version,
sitepackages,
usedevelop,
deps,
alwayscopy,
):
self.base_resolved_python_md5 = base_resolved_python_md5
self.base_resolved_python_path = base_resolved_python_path
self.tox_version = tox_version
self.sitepackages = sitepackages
self.usedevelop = usedevelop
self.alwayscopy = alwayscopy
self.deps = deps
def writeconfig(self, path):
lines = [
"{} {}".format(self.base_resolved_python_md5, self.base_resolved_python_path),
"{} {:d} {:d} {:d}".format(
self.tox_version, self.sitepackages, self.usedevelop, self.alwayscopy
),
]
for dep in self.deps:
lines.append("{} {}".format(*dep))
content = "\n".join(lines)
path.ensure()
path.write(content)
return content
@classmethod
def readconfig(cls, path):
try:
lines = path.readlines(cr=0)
base_resolved_python_info = lines.pop(0).split(None, 1)
tox_version, sitepackages, usedevelop, alwayscopy = lines.pop(0).split(None, 4)
sitepackages = bool(int(sitepackages))
usedevelop = bool(int(usedevelop))
alwayscopy = bool(int(alwayscopy))
deps = []
for line in lines:
base_resolved_python_md5, depstring = line.split(None, 1)
deps.append((base_resolved_python_md5, depstring))
base_resolved_python_md5, base_resolved_python_path = base_resolved_python_info
return CreationConfig(
base_resolved_python_md5,
base_resolved_python_path,
tox_version,
sitepackages,
usedevelop,
deps,
alwayscopy,
)
except Exception:
return None
def matches_with_reason(self, other, deps_matches_subset=False):
for attr in (
"base_resolved_python_md5",
"base_resolved_python_path",
"tox_version",
"sitepackages",
"usedevelop",
"alwayscopy",
):
left = getattr(self, attr)
right = getattr(other, attr)
if left != right:
return False, "attr {} {!r}!={!r}".format(attr, left, right)
self_deps = set(self.deps)
other_deps = set(other.deps)
if self_deps != other_deps:
if deps_matches_subset:
diff = other_deps - self_deps
if diff:
return False, "missing in previous {!r}".format(diff)
else:
return False, "{!r}!={!r}".format(self_deps, other_deps)
return True, None
def matches(self, other, deps_matches_subset=False):
outcome, _ = self.matches_with_reason(other, deps_matches_subset)
return outcome
[docs]class VirtualEnv(object):
def __init__(self, envconfig=None, session=None):
self.envconfig = envconfig
self.session = session
@property
def hook(self):
return self.envconfig.config.pluginmanager.hook
@property
def path(self):
""" Path to environment base dir. """
return self.envconfig.envdir
@property
def path_config(self):
return self.path.join(".tox-config1")
@property
def name(self):
""" test environment name. """
return self.envconfig.envname
def __repr__(self):
return "<VirtualEnv at {!r}>".format(self.path)
[docs] def getcommandpath(self, name, venv=True, cwd=None):
""" Return absolute path (str or localpath) for specified command name.
- If it's a local path we will rewrite it as as a relative path.
- If venv is True we will check if the command is coming from the venv
or is whitelisted to come from external.
"""
name = str(name)
if os.path.isabs(name):
return name
if os.path.split(name)[0] == ".":
path = cwd.join(name)
if path.check():
return str(path)
if venv:
path = self._venv_lookup_and_check_external_whitelist(name)
else:
path = self._normal_lookup(name)
if path is None:
raise tox.exception.InvocationError("could not find executable {!r}".format(name))
return str(path) # will not be rewritten for reporting
def _venv_lookup_and_check_external_whitelist(self, name):
path = self._venv_lookup(name)
if path is None:
path = self._normal_lookup(name)
if path is not None:
self._check_external_allowed_and_warn(path)
return path
def _venv_lookup(self, name):
return py.path.local.sysfind(name, paths=[self.envconfig.envbindir])
def _normal_lookup(self, name):
return py.path.local.sysfind(name)
def _check_external_allowed_and_warn(self, path):
if not self.is_allowed_external(path):
self.session.report.warning(
"test command found but not installed in testenv\n"
" cmd: {}\n"
" env: {}\n"
"Maybe you forgot to specify a dependency? "
"See also the whitelist_externals envconfig setting.".format(
path, self.envconfig.envdir
)
)
def is_allowed_external(self, p):
tryadd = [""]
if tox.INFO.IS_WIN:
tryadd += [os.path.normcase(x) for x in os.environ["PATHEXT"].split(os.pathsep)]
p = py.path.local(os.path.normcase(str(p)))
for x in self.envconfig.whitelist_externals:
for add in tryadd:
if p.fnmatch(x + add):
return True
return False
[docs] def update(self, action):
""" return status string for updating actual venv to match configuration.
if status string is empty, all is ok.
"""
rconfig = CreationConfig.readconfig(self.path_config)
if self.envconfig.recreate:
reason = "-r flag"
else:
if rconfig is None:
reason = "no previous config {}".format(self.path_config)
else:
live_config = self._getliveconfig()
deps_subset_match = getattr(self.envconfig, "deps_matches_subset", False)
outcome, reason = rconfig.matches_with_reason(live_config, deps_subset_match)
if reason is None:
action.info("reusing", self.envconfig.envdir)
return
action.info("cannot reuse", reason)
if rconfig is None:
action.setactivity("create", self.envconfig.envdir)
else:
action.setactivity("recreate", self.envconfig.envdir)
try:
self.hook.tox_testenv_create(action=action, venv=self)
self.just_created = True
except tox.exception.UnsupportedInterpreter as exception:
return exception
try:
self.hook.tox_testenv_install_deps(action=action, venv=self)
except tox.exception.InvocationError as exception:
return "could not install deps {}; v = {!r}".format(self.envconfig.deps, exception)
def _getliveconfig(self):
base_resolved_python_path = self.envconfig.python_info.executable
version = tox.__version__
sitepackages = self.envconfig.sitepackages
develop = self.envconfig.usedevelop
alwayscopy = self.envconfig.alwayscopy
deps = []
for dep in self.get_resolved_dependencies():
dep_name_md5 = getdigest(dep.name)
deps.append((dep_name_md5, dep.name))
base_resolved_python_md5 = getdigest(base_resolved_python_path)
return CreationConfig(
base_resolved_python_md5,
base_resolved_python_path,
version,
sitepackages,
develop,
deps,
alwayscopy,
)
def _getresolvedeps(self):
warnings.warn(
"that's a private function there, use get_resolved_dependencies,"
"this will be removed in 3.2",
category=DeprecationWarning,
)
return self.get_resolved_dependencies()
def get_resolved_dependencies(self):
dependencies = []
for dependency in self.envconfig.deps:
if dependency.indexserver is None:
package = self.session._resolve_package(package_spec=dependency.name)
if package != dependency.name:
dependency = dependency.__class__(package)
dependencies.append(dependency)
return dependencies
def getsupportedinterpreter(self):
return self.envconfig.getsupportedinterpreter()
def matching_platform(self):
return re.match(self.envconfig.platform, sys.platform)
def finish(self):
previous_config = CreationConfig.readconfig(self.path_config)
live_config = self._getliveconfig()
if previous_config is None or not previous_config.matches(live_config):
content = live_config.writeconfig(self.path_config)
self.session.report.verbosity1(
"write config to {} as {!r}".format(self.path_config, content)
)
def _needs_reinstall(self, setupdir, action):
setup_py = setupdir.join("setup.py")
setup_cfg = setupdir.join("setup.cfg")
args = [self.envconfig.envpython, str(setup_py), "--name"]
env = self._get_os_environ()
output = action.popen(
args, cwd=setupdir, redirect=False, returnout=True, env=env, capture_err=False
)
name = next(
(i for i in output.split("\n") if i and not i.startswith("pydev debugger:")), ""
)
args = [
self.envconfig.envpython,
"-c",
"import sys; import json; print(json.dumps(sys.path))",
]
out = action.popen(args, redirect=False, returnout=True, env=env)
try:
sys_path = json.loads(out)
except ValueError:
sys_path = []
egg_info_fname = ".".join((to_filename(name), "egg-info"))
for d in reversed(sys_path):
egg_info = py.path.local(d).join(egg_info_fname)
if egg_info.check():
break
else:
return True
needs_reinstall = any(
conf_file.check() and conf_file.mtime() > egg_info.mtime()
for conf_file in (setup_py, setup_cfg)
)
# Ensure the modification time of the egg-info folder is updated so we
# won't need to do this again.
# TODO(stephenfin): Remove once the minimum version of setuptools is
# high enough to include https://github.com/pypa/setuptools/pull/1427/
if needs_reinstall:
egg_info.setmtime()
return needs_reinstall
def install_pkg(self, dir, action, name, is_develop=False):
assert action is not None
if getattr(self, "just_created", False):
action.setactivity(name, dir)
self.finish()
pip_flags = ["--exists-action", "w"]
else:
if is_develop and not self._needs_reinstall(dir, action):
action.setactivity("{}-noop".format(name), dir)
return
action.setactivity("{}-nodeps".format(name), dir)
pip_flags = ["--no-deps"] + ([] if is_develop else ["-U"])
pip_flags.extend(["-v"] * min(3, action.report.verbosity - 2))
if action.venv.envconfig.extras:
dir += "[{}]".format(",".join(action.venv.envconfig.extras))
target = [dir]
if is_develop:
target.insert(0, "-e")
self._install(target, extraopts=pip_flags, action=action)
def developpkg(self, setupdir, action):
self.install_pkg(setupdir, action, "develop-inst", is_develop=True)
def installpkg(self, sdistpath, action):
self.install_pkg(sdistpath, action, "inst")
def _installopts(self, indexserver):
options = []
if indexserver:
options += ["-i", indexserver]
if self.envconfig.pip_pre:
options.append("--pre")
return options
def run_install_command(self, packages, action, options=()):
def expand(val):
# expand an install command
if val == "{packages}":
for package in packages:
yield package
elif val == "{opts}":
for opt in options:
yield opt
else:
yield val
cmd = list(chain.from_iterable(expand(val) for val in self.envconfig.install_command))
self.ensure_pip_os_environ_ok()
old_stdout = sys.stdout
sys.stdout = codecs.getwriter("utf8")(sys.stdout)
try:
self._pcall(
cmd,
cwd=self.envconfig.config.toxinidir,
action=action,
redirect=self.session.report.verbosity < 2,
)
finally:
sys.stdout = old_stdout
def ensure_pip_os_environ_ok(self):
for key in ("PIP_RESPECT_VIRTUALENV", "PIP_REQUIRE_VIRTUALENV", "__PYVENV_LAUNCHER__"):
os.environ.pop(key, None)
if "PYTHONPATH" not in self.envconfig.passenv:
# If PYTHONPATH not explicitly asked for, remove it.
if "PYTHONPATH" in os.environ:
self.session.report.warning(
"Discarding $PYTHONPATH from environment, to override "
"specify PYTHONPATH in 'passenv' in your configuration."
)
os.environ.pop("PYTHONPATH")
# installing packages at user level may mean we're not installing inside the venv
os.environ["PIP_USER"] = "0"
# installing without dependencies may lead to broken packages
os.environ["PIP_NO_DEPS"] = "0"
def _install(self, deps, extraopts=None, action=None):
if not deps:
return
d = {}
ixservers = []
for dep in deps:
if isinstance(dep, (str, py.path.local)):
dep = DepConfig(str(dep), None)
assert isinstance(dep, DepConfig), dep
if dep.indexserver is None:
ixserver = self.envconfig.config.indexserver["default"]
else:
ixserver = dep.indexserver
d.setdefault(ixserver, []).append(dep.name)
if ixserver not in ixservers:
ixservers.append(ixserver)
assert ixserver.url is None or isinstance(ixserver.url, str)
for ixserver in ixservers:
packages = d[ixserver]
options = self._installopts(ixserver.url)
if extraopts:
options.extend(extraopts)
self.run_install_command(packages=packages, options=options, action=action)
def _get_os_environ(self, is_test_command=False):
if is_test_command:
# for executing tests we construct a clean environment
env = {}
for env_key in self.envconfig.passenv:
if env_key in os.environ:
env[env_key] = os.environ[env_key]
else:
# for executing non-test commands we use the full
# invocation environment
env = os.environ.copy()
# in any case we honor per-testenv setenv configuration
env.update(self.envconfig.setenv)
env["VIRTUAL_ENV"] = str(self.path)
return env
def test(
self,
redirect=False,
name="runtests",
commands=None,
ignore_outcome=None,
ignore_errors=None,
display_hash_seed=False,
):
if commands is None:
commands = self.envconfig.commands
if ignore_outcome is None:
ignore_outcome = self.envconfig.ignore_outcome
if ignore_errors is None:
ignore_errors = self.envconfig.ignore_errors
with self.session.newaction(self, name) as action:
cwd = self.envconfig.changedir
if display_hash_seed:
env = self._get_os_environ(is_test_command=True)
# Display PYTHONHASHSEED to assist with reproducibility.
action.setactivity(name, "PYTHONHASHSEED={!r}".format(env.get("PYTHONHASHSEED")))
for i, argv in enumerate(commands):
# have to make strings as _pcall changes argv[0] to a local()
# happens if the same environment is invoked twice
message = "commands[{}] | {}".format(
i, " ".join([pipes.quote(str(x)) for x in argv])
)
action.setactivity(name, message)
# check to see if we need to ignore the return code
# if so, we need to alter the command line arguments
if argv[0].startswith("-"):
ignore_ret = True
if argv[0] == "-":
del argv[0]
else:
argv[0] = argv[0].lstrip("-")
else:
ignore_ret = False
try:
self._pcall(
argv,
cwd=cwd,
action=action,
redirect=redirect,
ignore_ret=ignore_ret,
is_test_command=True,
)
except tox.exception.InvocationError as err:
if ignore_outcome:
msg = "command failed but result from testenv is ignored\ncmd:"
self.session.report.warning("{} {}".format(msg, err))
self.status = "ignored failed command"
continue # keep processing commands
self.session.report.error(str(err))
self.status = "commands failed"
if not ignore_errors:
break # Don't process remaining commands
except KeyboardInterrupt:
self.status = "keyboardinterrupt"
self.session.report.error(self.status)
raise
def _pcall(
self,
args,
cwd,
venv=True,
is_test_command=False,
action=None,
redirect=True,
ignore_ret=False,
returnout=False,
):
# construct environment variables
os.environ.pop("VIRTUALENV_PYTHON", None)
env = self._get_os_environ(is_test_command=is_test_command)
bin_dir = str(self.envconfig.envbindir)
env["PATH"] = os.pathsep.join([bin_dir, os.environ["PATH"]])
self.session.report.verbosity2("setting PATH={}".format(env["PATH"]))
# get command
args[0] = self.getcommandpath(args[0], venv, cwd)
if sys.platform != "win32" and "TOX_LIMITED_SHEBANG" in os.environ:
args = prepend_shebang_interpreter(args)
cwd.ensure(dir=1) # ensure the cwd exists
return action.popen(
args, cwd=cwd, env=env, redirect=redirect, ignore_ret=ignore_ret, returnout=returnout
)
def getdigest(path):
path = py.path.local(path)
if not path.check(file=1):
return "0" * 32
return path.computehash()
def prepend_shebang_interpreter(args):
# prepend interpreter directive (if any) to argument list
#
# When preparing virtual environments in a file container which has large
# length, the system might not be able to invoke shebang scripts which
# define interpreters beyond system limits (e.x. Linux as a limit of 128;
# BINPRM_BUF_SIZE). This method can be used to check if the executable is
# a script containing a shebang line. If so, extract the interpreter (and
# possible optional argument) and prepend the values to the provided
# argument list. tox will only attempt to read an interpreter directive of
# a maximum size of 2048 bytes to limit excessive reading and support UNIX
# systems which may support a longer interpret length.
try:
with open(args[0], "rb") as f:
if f.read(1) == b"#" and f.read(1) == b"!":
MAXINTERP = 2048
interp = f.readline(MAXINTERP).rstrip().decode("UTF-8")
interp_args = interp.split(None, 1)[:2]
return interp_args + args
except (UnicodeDecodeError, IOError):
pass
return args
@tox.hookimpl
def tox_testenv_create(venv, action):
config_interpreter = venv.getsupportedinterpreter()
args = [sys.executable, "-m", "virtualenv"]
if venv.envconfig.sitepackages:
args.append("--system-site-packages")
if venv.envconfig.alwayscopy:
args.append("--always-copy")
# add interpreter explicitly, to prevent using default (virtualenv.ini)
args.extend(["--python", str(config_interpreter)])
venv.session.make_emptydir(venv.path)
basepath = venv.path.dirpath()
basepath.ensure(dir=1)
args.append(venv.path.basename)
venv._pcall(args, venv=False, action=action, cwd=basepath)
return True # Return non-None to indicate plugin has completed
@tox.hookimpl
def tox_testenv_install_deps(venv, action):
deps = venv.get_resolved_dependencies()
if deps:
depinfo = ", ".join(map(str, deps))
action.setactivity("installdeps", depinfo)
venv._install(deps, action=action)
return True # Return non-None to indicate plugin has completed
@tox.hookimpl
def tox_runtest(venv, redirect):
venv.test(redirect=redirect)
return True # Return non-None to indicate plugin has completed
@tox.hookimpl
def tox_runtest_pre(venv):
venv.status = 0
venv.session.make_emptydir(venv.envconfig.envtmpdir)
venv.envconfig.envtmpdir.ensure(dir=1)
venv.test(
name="run-test-pre",
commands=venv.envconfig.commands_pre,
redirect=False,
ignore_outcome=False,
ignore_errors=False,
display_hash_seed=True,
)
@tox.hookimpl
def tox_runtest_post(venv):
venv.test(
name="run-test-post",
commands=venv.envconfig.commands_post,
redirect=False,
ignore_outcome=False,
ignore_errors=False,
)
@tox.hookimpl
def tox_runenvreport(venv, action):
# write out version dependency information
args = venv.envconfig.list_dependencies_command
output = venv._pcall(args, cwd=venv.envconfig.config.toxinidir, action=action)
# the output contains a mime-header, skip it
output = output.split("\n\n")[-1]
packages = output.strip().split("\n")
return packages # Return non-None to indicate plugin has completed
