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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import division, print_function, unicode_literals
import math
import os
import shutil
import sys
from pathlib import Path
if sys.version_info[0] < 3:
import __builtin__ as builtins
class MetaPathFinder(object):
pass
else:
from importlib.abc import MetaPathFinder
from types import ModuleType
STATE_DIR_FIRST_RUN = """
Mach and the build system store shared state in a common directory
on the filesystem. The following directory will be created:
{}
If you would like to use a different directory, hit CTRL+c, set the
MOZBUILD_STATE_PATH environment variable to the directory you'd like to
use, and run Mach again.
Press ENTER/RETURN to continue or CTRL+c to abort.
""".strip()
CATEGORIES = {
"build": {
"short": "Build Commands",
"long": "Interact with the build system",
"priority": 80,
},
"post-build": {
"short": "Post-build Commands",
"long": "Common actions performed after completing a build.",
"priority": 70,
},
"testing": {
"short": "Testing",
"long": "Run tests.",
"priority": 60,
},
"ci": {
"short": "CI",
"long": "Taskcluster commands",
"priority": 59,
},
"devenv": {
"short": "Development Environment",
"long": "Set up and configure your development environment.",
"priority": 50,
},
"build-dev": {
"short": "Low-level Build System Interaction",
"long": "Interact with specific parts of the build system.",
"priority": 20,
},
"misc": {
"short": "Potpourri",
"long": "Potent potables and assorted snacks.",
"priority": 10,
},
"release": {
"short": "Release automation",
"long": "Commands for used in release automation.",
"priority": 5,
},
"disabled": {
"short": "Disabled",
"long": "The disabled commands are hidden by default. Use -v to display them. "
"These commands are unavailable for your current context, "
'run "mach <command>" to see why.',
"priority": 0,
},
}
def _activate_python_environment(topsrcdir, get_state_dir):
from mach.site import MachSiteManager
mach_environment = MachSiteManager.from_environment(
topsrcdir,
get_state_dir,
)
mach_environment.activate()
def _maybe_activate_mozillabuild_environment():
if sys.platform != "win32":
return
mozillabuild = Path(os.environ.get("MOZILLABUILD", r"C:\mozilla-build"))
os.environ.setdefault("MOZILLABUILD", str(mozillabuild))
assert mozillabuild.exists(), (
f'MozillaBuild was not found at "{mozillabuild}".\n'
"If it's installed in a different location, please "
'set the "MOZILLABUILD" environment variable '
"accordingly."
)
use_msys2 = (mozillabuild / "msys2").exists()
if use_msys2:
mozillabuild_msys_tools_path = mozillabuild / "msys2" / "usr" / "bin"
else:
mozillabuild_msys_tools_path = mozillabuild / "msys" / "bin"
paths_to_add = [mozillabuild_msys_tools_path, mozillabuild / "bin"]
existing_paths = [Path(p) for p in os.environ.get("PATH", "").split(os.pathsep)]
for new_path in paths_to_add:
if new_path not in existing_paths:
os.environ["PATH"] += f"{os.pathsep}{new_path}"
def initialize(topsrcdir):
# This directory was deleted in bug 1666345, but there may be some ignored
# files here. We can safely just delete it for the user so they don't have
# to clean the repo themselves.
deleted_dir = os.path.join(topsrcdir, "third_party", "python", "psutil")
if os.path.exists(deleted_dir):
shutil.rmtree(deleted_dir, ignore_errors=True)
# We need the "mach" module to access the logic to parse virtualenv
# requirements. Since that depends on "packaging" (and, transitively,
# "pyparsing"), we add those to the path too.
sys.path[0:0] = [
os.path.join(topsrcdir, module)
for module in (
os.path.join("python", "mach"),
os.path.join("third_party", "python", "packaging"),
os.path.join("third_party", "python", "pyparsing"),
)
]
from mach.util import setenv, get_state_dir
state_dir = _create_state_dir()
# normpath state_dir to normalize msys-style slashes.
_activate_python_environment(
topsrcdir, lambda: os.path.normpath(get_state_dir(True, topsrcdir=topsrcdir))
)
_maybe_activate_mozillabuild_environment()
import mach.base
import mach.main
from mach.main import MachCommandReference
# Centralized registry of available mach commands
MACH_COMMANDS = {
"valgrind-test": MachCommandReference("build/valgrind/mach_commands.py"),
"devtools-css-db": MachCommandReference(
"devtools/shared/css/generated/mach_commands.py"
),
"webidl-example": MachCommandReference("dom/bindings/mach_commands.py"),
"webidl-parser-test": MachCommandReference("dom/bindings/mach_commands.py"),
"hazards": MachCommandReference(
"js/src/devtools/rootAnalysis/mach_commands.py"
),
"reftest": MachCommandReference("layout/tools/reftest/mach_commands.py"),
"jstestbrowser": MachCommandReference("layout/tools/reftest/mach_commands.py"),
"crashtest": MachCommandReference("layout/tools/reftest/mach_commands.py"),
"android": MachCommandReference("mobile/android/mach_commands.py"),
"gradle": MachCommandReference("mobile/android/mach_commands.py"),
"gradle-install": MachCommandReference("mobile/android/mach_commands.py"),
"mach-commands": MachCommandReference(
"python/mach/mach/commands/commandinfo.py"
),
"mach-debug-commands": MachCommandReference(
"python/mach/mach/commands/commandinfo.py"
),
"mach-completion": MachCommandReference(
"python/mach/mach/commands/commandinfo.py"
),
"settings": MachCommandReference("python/mach/mach/commands/settings.py"),
"python": MachCommandReference("python/mach_commands.py"),
"python-test": MachCommandReference("python/mach_commands.py"),
"bootstrap": MachCommandReference("python/mozboot/mozboot/mach_commands.py"),
"vcs-setup": MachCommandReference("python/mozboot/mozboot/mach_commands.py"),
"artifact": MachCommandReference(
"python/mozbuild/mozbuild/artifact_commands.py"
),
"ide": MachCommandReference(
"python/mozbuild/mozbuild/backend/mach_commands.py"
),
"build": MachCommandReference("python/mozbuild/mozbuild/build_commands.py"),
"configure": MachCommandReference("python/mozbuild/mozbuild/build_commands.py"),
"resource-usage": MachCommandReference(
"python/mozbuild/mozbuild/build_commands.py"
),
"build-backend": MachCommandReference(
"python/mozbuild/mozbuild/build_commands.py"
),
"clang-tidy": MachCommandReference(
"python/mozbuild/mozbuild/code_analysis/mach_commands.py"
),
"static-analysis": MachCommandReference(
"python/mozbuild/mozbuild/code_analysis/mach_commands.py"
),
"prettier-format": MachCommandReference(
"python/mozbuild/mozbuild/code_analysis/mach_commands.py"
),
"clang-format": MachCommandReference(
"python/mozbuild/mozbuild/code_analysis/mach_commands.py"
),
"compileflags": MachCommandReference(
"python/mozbuild/mozbuild/compilation/codecomplete.py"
),
"mozbuild-reference": MachCommandReference(
"python/mozbuild/mozbuild/frontend/mach_commands.py"
),
"file-info": MachCommandReference(
"python/mozbuild/mozbuild/frontend/mach_commands.py"
),
"vendor": MachCommandReference(
"python/mozbuild/mozbuild/vendor/mach_commands.py"
),
"watch": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"cargo": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"doctor": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"clobber": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"show-log": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"warnings-summary": MachCommandReference(
"python/mozbuild/mozbuild/mach_commands.py"
),
"warnings-list": MachCommandReference(
"python/mozbuild/mozbuild/mach_commands.py"
),
"gtest": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"package": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"install": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"run": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"buildsymbols": MachCommandReference(
"python/mozbuild/mozbuild/mach_commands.py"
),
"environment": MachCommandReference(
"python/mozbuild/mozbuild/mach_commands.py"
),
"repackage": MachCommandReference("python/mozbuild/mozbuild/mach_commands.py"),
"package-multi-locale": MachCommandReference(
"python/mozbuild/mozbuild/mach_commands.py"
),
"perftest": MachCommandReference(
"python/mozperftest/mozperftest/mach_commands.py"
),
"perftest-test": MachCommandReference(
"python/mozperftest/mozperftest/mach_commands.py"
),
"release": MachCommandReference(
"python/mozrelease/mozrelease/mach_commands.py"
),
"remote": MachCommandReference("remote/mach_commands.py"),
"puppeteer-test": MachCommandReference("remote/mach_commands.py"),
"generate-test-certs": MachCommandReference(
"security/manager/tools/mach_commands.py"
),
"taskgraph": MachCommandReference("taskcluster/mach_commands.py"),
"taskcluster-load-image": MachCommandReference("taskcluster/mach_commands.py"),
"taskcluster-build-image": MachCommandReference("taskcluster/mach_commands.py"),
"taskcluster-image-digest": MachCommandReference(
"taskcluster/mach_commands.py"
),
"release-history": MachCommandReference("taskcluster/mach_commands.py"),
"awsy-test": MachCommandReference("testing/awsy/mach_commands.py"),
"fetch-condprofile": MachCommandReference(
"testing/condprofile/mach_commands.py"
),
"run-condprofile": MachCommandReference("testing/condprofile/mach_commands.py"),
"firefox-ui-functional": MachCommandReference(
"testing/firefox-ui/mach_commands.py"
),
"geckodriver": MachCommandReference("testing/geckodriver/mach_commands.py"),
"addtest": MachCommandReference("testing/mach_commands.py"),
"test": MachCommandReference("testing/mach_commands.py"),
"cppunittest": MachCommandReference("testing/mach_commands.py"),
"jstests": MachCommandReference("testing/mach_commands.py"),
"jit-test": MachCommandReference("testing/mach_commands.py"),
"jsapi-tests": MachCommandReference("testing/mach_commands.py"),
"jsshell-bench": MachCommandReference("testing/mach_commands.py"),
"cramtest": MachCommandReference("testing/mach_commands.py"),
"test-info": MachCommandReference("testing/mach_commands.py"),
"rusttests": MachCommandReference("testing/mach_commands.py"),
"fluent-migration-test": MachCommandReference("testing/mach_commands.py"),
"marionette-test": MachCommandReference("testing/marionette/mach_commands.py"),
"mochitest": MachCommandReference("testing/mochitest/mach_commands.py"),
"geckoview-junit": MachCommandReference("testing/mochitest/mach_commands.py"),
"mozharness": MachCommandReference("testing/mozharness/mach_commands.py"),
"raptor": MachCommandReference("testing/raptor/mach_commands.py"),
"raptor-test": MachCommandReference("testing/raptor/mach_commands.py"),
"talos-test": MachCommandReference("testing/talos/mach_commands.py"),
"tps-build": MachCommandReference("testing/tps/mach_commands.py"),
"web-platform-tests": MachCommandReference(
"testing/web-platform/mach_commands.py"
),
"wpt": MachCommandReference("testing/web-platform/mach_commands.py"),
"web-platform-tests-update": MachCommandReference(
"testing/web-platform/mach_commands.py"
),
"wpt-update": MachCommandReference("testing/web-platform/mach_commands.py"),
"wpt-manifest-update": MachCommandReference(
"testing/web-platform/mach_commands.py"
),
"wpt-serve": MachCommandReference("testing/web-platform/mach_commands.py"),
"wpt-metadata-summary": MachCommandReference(
"testing/web-platform/mach_commands.py"
),
"wpt-metadata-merge": MachCommandReference(
"testing/web-platform/mach_commands.py"
),
"wpt-unittest": MachCommandReference("testing/web-platform/mach_commands.py"),
"wpt-test-paths": MachCommandReference("testing/web-platform/mach_commands.py"),
"wpt-fission-regressions": MachCommandReference(
"testing/web-platform/mach_commands.py"
),
"xpcshell-test": MachCommandReference("testing/xpcshell/mach_commands.py"),
"telemetry-tests-client": MachCommandReference(
"toolkit/components/telemetry/tests/marionette/mach_commands.py"
),
"data-review": MachCommandReference(
"toolkit/components/glean/build_scripts/mach_commands.py"
),
"perf-data-review": MachCommandReference(
"toolkit/components/glean/build_scripts/mach_commands.py"
),
"update-glean-tags": MachCommandReference(
"toolkit/components/glean/build_scripts/mach_commands.py"
),
"update-glean": MachCommandReference(
"toolkit/components/glean/build_scripts/mach_commands.py"
),
"browsertime": MachCommandReference("tools/browsertime/mach_commands.py"),
"compare-locales": MachCommandReference(
"tools/compare-locales/mach_commands.py"
),
"l10n-cross-channel": MachCommandReference("tools/lint/mach_commands.py"),
"busted": MachCommandReference("tools/mach_commands.py"),
"pastebin": MachCommandReference("tools/mach_commands.py"),
"mozregression": MachCommandReference("tools/mach_commands.py"),
"node": MachCommandReference("tools/mach_commands.py"),
"npm": MachCommandReference("tools/mach_commands.py"),
"logspam": MachCommandReference("tools/mach_commands.py"),
"doc": MachCommandReference("tools/moztreedocs/mach_commands.py"),
"install-moz-phab": MachCommandReference("tools/phabricator/mach_commands.py"),
"power": MachCommandReference("tools/power/mach_commands.py"),
"try": MachCommandReference("tools/tryselect/mach_commands.py"),
"import-pr": MachCommandReference("tools/vcs/mach_commands.py"),
"test-interventions": MachCommandReference(
"testing/webcompat/mach_commands.py"
),
"esmify": MachCommandReference("tools/esmify/mach_commands.py"),
"xpcshell": MachCommandReference("js/xpconnect/mach_commands.py"),
"uniffi": MachCommandReference(
"toolkit/components/uniffi-bindgen-gecko-js/mach_commands.py"
),
}
# Set a reasonable limit to the number of open files.
#
# Some linux systems set `ulimit -n` to a very high number, which works
# well for systems that run servers, but this setting causes performance
# problems when programs close file descriptors before forking, like
# Python's `subprocess.Popen(..., close_fds=True)` (close_fds=True is the
# default in Python 3), or Rust's stdlib. In some cases, Firefox does the
# same thing when spawning processes. We would prefer to lower this limit
# to avoid such performance problems; processes spawned by `mach` will
# inherit the limit set here.
#
# The Firefox build defaults the soft limit to 1024, except for builds that
# do LTO, where the soft limit is 8192. We're going to default to the
# latter, since people do occasionally do LTO builds on their local
# machines, and requiring them to discover another magical setting after
# setting up an LTO build in the first place doesn't seem good.
#
# This code mimics the code in taskcluster/scripts/run-task.
try:
import resource
# Keep the hard limit the same, though, allowing processes to change
# their soft limit if they need to (Firefox does, for instance).
(soft, hard) = resource.getrlimit(resource.RLIMIT_NOFILE)
# Permit people to override our default limit if necessary via
# MOZ_LIMIT_NOFILE, which is the same variable `run-task` uses.
limit = os.environ.get("MOZ_LIMIT_NOFILE")
if limit:
limit = int(limit)
else:
# If no explicit limit is given, use our default if it's less than
# the current soft limit. For instance, the default on macOS is
# 256, so we'd pick that rather than our default.
limit = min(soft, 8192)
# Now apply the limit, if it's different from the original one.
if limit != soft:
resource.setrlimit(resource.RLIMIT_NOFILE, (limit, hard))
except ImportError:
# The resource module is UNIX only.
pass
def resolve_repository():
import mozversioncontrol
try:
# This API doesn't respect the vcs binary choices from configure.
# If we ever need to use the VCS binary here, consider something
# more robust.
return mozversioncontrol.get_repository_object(path=topsrcdir)
except (mozversioncontrol.InvalidRepoPath, mozversioncontrol.MissingVCSTool):
return None
def pre_dispatch_handler(context, handler, args):
# If --disable-tests flag was enabled in the mozconfig used to compile
# the build, tests will be disabled. Instead of trying to run
# nonexistent tests then reporting a failure, this will prevent mach
# from progressing beyond this point.
if handler.category == "testing" and not handler.ok_if_tests_disabled:
from mozbuild.base import BuildEnvironmentNotFoundException
try:
from mozbuild.base import MozbuildObject
# all environments should have an instance of build object.
build = MozbuildObject.from_environment()
if build is not None and not getattr(
build, "substs", {"ENABLE_TESTS": True}
).get("ENABLE_TESTS"):
print(
"Tests have been disabled with --disable-tests.\n"
+ "Remove the flag, and re-compile to enable tests."
)
sys.exit(1)
except BuildEnvironmentNotFoundException:
# likely automation environment, so do nothing.
pass
def post_dispatch_handler(
context, handler, instance, success, start_time, end_time, depth, args
):
"""Perform global operations after command dispatch.
For now, we will use this to handle build system telemetry.
"""
# Don't finalize telemetry data if this mach command was invoked as part of
# another mach command.
if depth != 1:
return
_finalize_telemetry_glean(
context.telemetry, handler.name == "bootstrap", success
)
def populate_context(key=None):
if key is None:
return
if key == "state_dir":
return state_dir
if key == "local_state_dir":
return get_state_dir(specific_to_topsrcdir=True)
if key == "topdir":
return topsrcdir
if key == "pre_dispatch_handler":
return pre_dispatch_handler
if key == "post_dispatch_handler":
return post_dispatch_handler
if key == "repository":
return resolve_repository()
raise AttributeError(key)
# Note which process is top-level so that recursive mach invocations can avoid writing
# telemetry data.
if "MACH_MAIN_PID" not in os.environ:
setenv("MACH_MAIN_PID", str(os.getpid()))
driver = mach.main.Mach(os.getcwd())
driver.populate_context_handler = populate_context
if not driver.settings_paths:
# default global machrc location
driver.settings_paths.append(state_dir)
# always load local repository configuration
driver.settings_paths.append(topsrcdir)
for category, meta in CATEGORIES.items():
driver.define_category(category, meta["short"], meta["long"], meta["priority"])
# Sparse checkouts may not have all mach_commands.py files. Ignore
# errors from missing files. Same for spidermonkey tarballs.
repo = resolve_repository()
missing_ok = (
repo is not None and repo.sparse_checkout_present()
) or os.path.exists(os.path.join(topsrcdir, "INSTALL"))
driver.load_commands_from_spec(MACH_COMMANDS, topsrcdir, missing_ok=missing_ok)
return driver
def _finalize_telemetry_glean(telemetry, is_bootstrap, success):
"""Submit telemetry collected by Glean.
Finalizes some metrics (command success state and duration, system information) and
requests Glean to send the collected data.
"""
from mach.telemetry import MACH_METRICS_PATH
from mozbuild.telemetry import (
get_cpu_brand,
get_distro_and_version,
get_psutil_stats,
get_shell_info,
get_vscode_running,
)
mach_metrics = telemetry.metrics(MACH_METRICS_PATH)
mach_metrics.mach.duration.stop()
mach_metrics.mach.success.set(success)
system_metrics = mach_metrics.mach.system
cpu_brand = get_cpu_brand()
if cpu_brand:
system_metrics.cpu_brand.set(cpu_brand)
distro, version = get_distro_and_version()
system_metrics.distro.set(distro)
system_metrics.distro_version.set(version)
vscode_terminal, ssh_connection = get_shell_info()
system_metrics.vscode_terminal.set(vscode_terminal)
system_metrics.ssh_connection.set(ssh_connection)
system_metrics.vscode_running.set(get_vscode_running())
has_psutil, logical_cores, physical_cores, memory_total = get_psutil_stats()
if has_psutil:
# psutil may not be available (we may not have been able to download
# a wheel or build it from source).
system_metrics.logical_cores.add(logical_cores)
if physical_cores is not None:
system_metrics.physical_cores.add(physical_cores)
if memory_total is not None:
system_metrics.memory.accumulate(
int(math.ceil(float(memory_total) / (1024 * 1024 * 1024)))
)
telemetry.submit(is_bootstrap)
def _create_state_dir():
# Global build system and mach state is stored in a central directory. By
# default, this is ~/.mozbuild. However, it can be defined via an
# environment variable. We detect first run (by lack of this directory
# existing) and notify the user that it will be created. The logic for
# creation is much simpler for the "advanced" environment variable use
# case. For default behavior, we educate users and give them an opportunity
# to react.
state_dir = os.environ.get("MOZBUILD_STATE_PATH")
if state_dir:
if not os.path.exists(state_dir):
print(
"Creating global state directory from environment variable: {}".format(
state_dir
)
)
else:
state_dir = os.path.expanduser("~/.mozbuild")
if not os.path.exists(state_dir):
if not os.environ.get("MOZ_AUTOMATION"):
print(STATE_DIR_FIRST_RUN.format(state_dir))
try:
sys.stdin.readline()
print("\n")
except KeyboardInterrupt:
sys.exit(1)
print("Creating default state directory: {}".format(state_dir))
os.makedirs(state_dir, mode=0o770, exist_ok=True)
return state_dir
# Hook import such that .pyc/.pyo files without a corresponding .py file in
# the source directory are essentially ignored. See further below for details
# and caveats.
# Objdirs outside the source directory are ignored because in most cases, if
# a .pyc/.pyo file exists there, a .py file will be next to it anyways.
class ImportHook(object):
def __init__(self, original_import):
self._original_import = original_import
# Assume the source directory is the parent directory of the one
# containing this file.
self._source_dir = (
os.path.normcase(
os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
)
+ os.sep
)
self._modules = set()
def __call__(self, name, globals=None, locals=None, fromlist=None, level=-1):
if sys.version_info[0] >= 3 and level < 0:
level = 0
# name might be a relative import. Instead of figuring out what that
# resolves to, which is complex, just rely on the real import.
# Since we don't know the full module name, we can't check sys.modules,
# so we need to keep track of which modules we've already seen to avoid
# to stat() them again when they are imported multiple times.
module = self._original_import(name, globals, locals, fromlist, level)
# Some tests replace modules in sys.modules with non-module instances.
if not isinstance(module, ModuleType):
return module
resolved_name = module.__name__
if resolved_name in self._modules:
return module
self._modules.add(resolved_name)
# Builtin modules don't have a __file__ attribute.
if not getattr(module, "__file__", None):
return module
# Note: module.__file__ is not always absolute.
path = os.path.normcase(os.path.abspath(module.__file__))
# Note: we could avoid normcase and abspath above for non pyc/pyo
# files, but those are actually rare, so it doesn't really matter.
if not path.endswith((".pyc", ".pyo")):
return module
# Ignore modules outside our source directory
if not path.startswith(self._source_dir):
return module
# If there is no .py corresponding to the .pyc/.pyo module we're
# loading, remove the .pyc/.pyo file, and reload the module.
# Since we already loaded the .pyc/.pyo module, if it had side
# effects, they will have happened already, and loading the module
# with the same name, from another directory may have the same side
# effects (or different ones). We assume it's not a problem for the
# python modules under our source directory (either because it
# doesn't happen or because it doesn't matter).
if not os.path.exists(module.__file__[:-1]):
if os.path.exists(module.__file__):
os.remove(module.__file__)
del sys.modules[module.__name__]
module = self(name, globals, locals, fromlist, level)
return module
# Hook import such that .pyc/.pyo files without a corresponding .py file in
# the source directory are essentially ignored. See further below for details
# and caveats.
# Objdirs outside the source directory are ignored because in most cases, if
# a .pyc/.pyo file exists there, a .py file will be next to it anyways.
class FinderHook(MetaPathFinder):
def __init__(self, klass):
# Assume the source directory is the parent directory of the one
# containing this file.
self._source_dir = (
os.path.normcase(
os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
)
+ os.sep
)
self.finder_class = klass
def find_spec(self, full_name, paths=None, target=None):
spec = self.finder_class.find_spec(full_name, paths, target)
# Some modules don't have an origin.
if spec is None or spec.origin is None:
return spec
# Normalize the origin path.
path = os.path.normcase(os.path.abspath(spec.origin))
# Note: we could avoid normcase and abspath above for non pyc/pyo
# files, but those are actually rare, so it doesn't really matter.
if not path.endswith((".pyc", ".pyo")):
return spec
# Ignore modules outside our source directory
if not path.startswith(self._source_dir):
return spec
# If there is no .py corresponding to the .pyc/.pyo module we're
# resolving, remove the .pyc/.pyo file, and try again.
if not os.path.exists(spec.origin[:-1]):
if os.path.exists(spec.origin):
os.remove(spec.origin)
spec = self.finder_class.find_spec(full_name, paths, target)
return spec
# Additional hook for python >= 3.8's importlib.metadata.
class MetadataHook(FinderHook):
def find_distributions(self, *args, **kwargs):
return self.finder_class.find_distributions(*args, **kwargs)
def hook(finder):
has_find_spec = hasattr(finder, "find_spec")
has_find_distributions = hasattr(finder, "find_distributions")
if has_find_spec and has_find_distributions:
return MetadataHook(finder)
elif has_find_spec:
return FinderHook(finder)
return finder
# Install our hook. This can be deleted when the Python 3 migration is complete.
if sys.version_info[0] < 3:
builtins.__import__ = ImportHook(builtins.__import__)
else:
sys.meta_path = [hook(c) for c in sys.meta_path]