#!/usr/bin/env python3 # Copyright (c) 2017 The Chromium Authors. All rights reserved. # Use of this source code is governed by a BSD-style license that can be # found in the LICENSE file. """ This script (intended to be invoked by autoninja or autoninja.bat) detects whether a build is accelerated using a service like RBE. If so, it runs with a large -j value, and otherwise it chooses a small one. This auto-adjustment makes using remote build acceleration simpler and safer, and avoids errors that can cause slow RBE builds, or swap-storms on unaccelerated builds. autoninja tries to detect relevant build settings such as use_remoteexec, and it does handle import statements, but it can't handle conditional setting of build settings. """ import importlib.util import multiprocessing import os import platform import re import shlex import shutil import subprocess import sys import time import uuid import warnings import android_build_server_helper import build_telemetry import gclient_paths import gclient_utils import gn_helper import ninja import ninjalog_uploader import reclient_helper import siso if sys.platform in ["darwin", "linux"]: import resource _SISO_SUGGESTION = """Please run 'gn clean {output_dir}' when convenient to upgrade this output directory to Siso (Chromium’s Ninja replacement). If you run into any issues, please file a bug via go/siso-bug and switch back temporarily by setting the GN arg 'use_siso = false'""" _SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__)) _NINJALOG_UPLOADER = os.path.join(_SCRIPT_DIR, "ninjalog_uploader.py") # See [1] and [2] for the painful details of this next section, which handles # escaping command lines so that they can be copied and pasted into a cmd # window. # # pylint: disable=line-too-long # [1] https://learn.microsoft.com/en-us/archive/blogs/twistylittlepassagesallalike/everyone-quotes-command-line-arguments-the-wrong-way # noqa # [2] https://web.archive.org/web/20150815000000*/https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/set.mspx # noqa _UNSAFE_FOR_CMD = set("^<>&|()%") _ALL_META_CHARS = _UNSAFE_FOR_CMD.union(set('"')) def _import_from_path(module_name, file_path): try: spec = importlib.util.spec_from_file_location(module_name, file_path) module = importlib.util.module_from_spec(spec) sys.modules[module_name] = module spec.loader.exec_module(module) except: raise ImportError( 'Could not import module "{}" from "{}"'.format( module_name, file_path), name=module_name, path=file_path, ) return module def _is_google_corp_machine(): """This assumes that corp machine has gcert binary in known location.""" return shutil.which("gcert") is not None def _reclient_rbe_project(): """Returns RBE project used by reclient.""" instance = os.environ.get('RBE_instance') if instance: m = re.match(instance, r'projects/([^/]*)/instances/.*') if m: return m[1] reproxy_cfg_path = reclient_helper.find_reclient_cfg() if not reproxy_cfg_path: return "" with open(reproxy_cfg_path) as f: for line in f: m = re.match(r'instance\s*=\s*projects/([^/]*)/instances/.*', line) if m: return m[1] return "" def _siso_rbe_project(): """Returns RBE project used by siso.""" siso_project = os.environ.get('SISO_PROJECT') if siso_project: return siso_project root_dir = gclient_paths.GetPrimarySolutionPath() if not root_dir: return "" sisoenv_path = os.path.join(root_dir, 'build/config/siso/.sisoenv') if not os.path.exists(sisoenv_path): return "" with open(sisoenv_path) as f: for line in f: m = re.match(r'SISO_PROJECT=\s*(\S*)\s*', line) if m: return m[1] return "" def _quote_for_cmd(arg): # First, escape the arg so that CommandLineToArgvW will parse it properly. if arg == "" or " " in arg or '"' in arg: quote_re = re.compile(r'(\\*)"') arg = '"%s"' % (quote_re.sub(lambda mo: 2 * mo.group(1) + '\\"', arg)) # Then check to see if the arg contains any metacharacters other than # double quotes; if it does, quote everything (including the double # quotes) for safety. if any(a in _UNSAFE_FOR_CMD for a in arg): arg = "".join("^" + a if a in _ALL_META_CHARS else a for a in arg) return arg def _print_cmd(cmd): shell_quoter = shlex.quote if sys.platform.startswith("win"): shell_quoter = _quote_for_cmd print(*[shell_quoter(arg) for arg in cmd], file=sys.stderr) def _get_remoteexec_defaults(): root_dir = gclient_paths.GetPrimarySolutionPath() if not root_dir: return None default_file = os.path.join(root_dir, "build/toolchain/remoteexec_defaults.gni") values = { "use_reclient_on_siso": True, "use_reclient_on_ninja": True, } if not os.path.exists(default_file): return values pattern = re.compile(r"(^|\s*)([^=\s]*)\s*=\s*(\S*)\s*$") with open(default_file, encoding="utf-8") as f: for line in f: line = line.split("#")[0] m = pattern.match(line) if not m: continue values[m.group(2)] = m.group(3) == "true" return values def _siso_supported(output_dir): root_dir = gclient_paths.GetPrimarySolutionPath() if not root_dir: return False sisoenv_path = os.path.join(root_dir, "build/config/siso/.sisoenv") if not os.path.exists(sisoenv_path): return False # If it's not chromium project, use Ninja. gclient_args_gni = os.path.join(root_dir, "build/config/gclient_args.gni") if not os.path.exists(gclient_args_gni): return False with open(gclient_args_gni) as f: if "build_with_chromium = true" not in f.read(): return False # Use Siso by default for Googlers working on corp machine. if _is_google_corp_machine(): return True # Otherwise, use Ninja, until we are ready to roll it out # on non-corp machines, too. # TODO(378078715): enable True by default. return False def _get_use_siso_default(output_dir): """Returns use_siso default value.""" if not _siso_supported(output_dir): return False # This output directory is already using Siso. if os.path.exists(os.path.join(output_dir, ".siso_deps")): return True # This output directory is still using Ninja. if os.path.exists(os.path.join(output_dir, ".ninja_deps")): print(_SISO_SUGGESTION.format(output_dir=output_dir), file=sys.stderr) return False return True def _main_inner(input_args, build_id, should_collect_logs=False): # if user doesn't set PYTHONPYCACHEPREFIX and PYTHONDONTWRITEBYTECODE # set PYTHONDONTWRITEBYTECODE=1 not to create many *.pyc in workspace # and keep workspace clean. if not os.environ.get("PYTHONPYCACHEPREFIX"): os.environ.setdefault("PYTHONDONTWRITEBYTECODE", "1") # Workaround for reproxy timing out on startup due to the Google Cloud # Go SDK making a call to user.Current(), which can be slow on Googler # machines due to go.dev/issue/68312. This can be removed once Go 1.24 # has been released, and reproxy + other tools have been rebuilt with # that. if _is_google_corp_machine(): os.environ.setdefault("GOOGLE_API_USE_CLIENT_CERTIFICATE", "false") # The -t tools are incompatible with -j t_specified = False j_specified = False offline = False output_dir = "." summarize_build = os.environ.get("NINJA_SUMMARIZE_BUILD") == "1" project = None # Ninja uses getopt_long, which allow to intermix non-option arguments. # To leave non supported parameters untouched, we do not use getopt. for index, arg in enumerate(input_args[1:]): if arg.startswith("-j"): j_specified = True if arg.startswith("-t"): t_specified = True if arg == "-C": # + 1 to get the next argument and +1 because we trimmed off # input_args[0] output_dir = input_args[index + 2] elif arg.startswith("-C"): # Support -Cout/Default output_dir = arg[2:] elif arg in ("-o", "--offline"): offline = True elif arg in ("--project", "-project"): project = input_args[index + 2] elif arg.startswith("--project="): project = arg[len("--project="):] elif arg.startswith("-project="): project = arg[len("-project="):] elif arg in ("-h", "--help"): print( "autoninja: Use -o/--offline to temporary disable remote execution.", file=sys.stderr, ) print(file=sys.stderr) use_remoteexec = False use_reclient = None use_android_build_server = False use_siso = None # Attempt to auto-detect remote build acceleration. We support gn-based # builds, where we look for args.gn in the build tree, and cmake-based # builds where we look for rules.ninja. if gn_helper.exists(output_dir): for k, v in gn_helper.args(output_dir): # use_remoteexec will activate build acceleration. # # This test can match multi-argument lines. Examples of this # are: is_debug=false use_remoteexec=true is_official_build=false # use_remoteexec=false# use_remoteexec=true This comment is ignored # # Anything after a comment is not consider a valid argument. if k == "use_remoteexec" and v == "true": use_remoteexec = True continue if k == "use_remoteexec" and v == "false": use_remoteexec = False continue if k == "use_siso" and v == "true": use_siso = True continue if k == "use_siso" and v == "false": use_siso = False continue if k == "use_reclient" and v == "true": use_reclient = True continue if k == "use_reclient" and v == "false": use_reclient = False continue if k == "android_static_analysis" and v == '"build_server"': use_android_build_server = True continue if use_siso is None: use_siso = _get_use_siso_default(output_dir) if use_reclient is None: if os.path.exists(os.path.join(output_dir, ".reproxy_tmp")): use_reclient = True elif use_remoteexec: values = _get_remoteexec_defaults() if use_siso: use_reclient = values["use_reclient_on_siso"] else: use_reclient = values["use_reclient_on_ninja"] if use_remoteexec: if use_reclient: project = _reclient_rbe_project() elif use_siso and project is None: # siso runs locally if empty project is given # even if use_remoteexec=true is set. project = _siso_rbe_project() if _is_google_corp_machine(): # user may login on non-@google.com account on corp, # but need to use @google.com and rbe-chrome-untrusted # on corp machine. if project == 'rbe-chromium-untrusted': print( "You can't use rbe-chromium-untrusted on corp " "machine.\n" "Please use rbe-chrome-untrusted and @google.com " "account instead to build chromium.\n", file=sys.stderr, ) return 1 else: # only @google.com is allowed to use rbe-chrome-untrusted # and use @google.com on non-corp machine is not allowed # by corp security policy. if project == 'rbe-chrome-untrusted': print( "You can't use rbe-chrome-untrusted on non-corp " "machine.\n" "Plase use rbe-chromium-untrusted and non-@google.com " "account instead to build chromium.", file=sys.stderr, ) return 1 # If --offline is set, then reclient will use the local compiler # instead of doing a remote compile. This is convenient if you want # to briefly disable remote compile. It avoids having to rebuild the # world when transitioning between RBE/non-RBE builds. However, it is # not as fast as doing a "normal" non-RBE build because an extra # process is created for each compile step. if offline and use_reclient: # Tell reclient to do local compiles. os.environ["RBE_remote_disabled"] = "1" if gclient_utils.IsEnvCog(): if not use_remoteexec or use_reclient or not use_siso: print( "WARNING: You're not using Siso's built-in remote " "execution. The build will be slow.\n" "You should set the following in args.gn to get better " "performance:\n" " use_remoteexec=true\n" " use_reclient=false\n" " use_siso=true\n", file=sys.stderr, ) siso_marker = os.path.join(output_dir, ".siso_deps") if use_siso: # siso generates a .ninja_log file so the mere existence of a # .ninja_log file doesn't imply that a ninja build was done. However # if there is a .ninja_log but no .siso_deps then that implies a # ninja build. ninja_marker = os.path.join(output_dir, ".ninja_log") if os.path.exists(ninja_marker) and not os.path.exists(siso_marker): print( "Run gn clean before switching from ninja to siso in %s" % output_dir, file=sys.stderr, ) return 1 # Build ID consistently used in other tools. e.g. Reclient, ninjalog. os.environ.setdefault("SISO_BUILD_ID", build_id) with android_build_server_helper.build_server_context( build_id, output_dir, use_android_build_server=use_android_build_server): if use_remoteexec: if use_reclient and not t_specified: return reclient_helper.run_siso( [ 'siso', 'ninja', # Do not authenticate when using Reproxy. '-project=', '-reapi_instance=', ] + input_args[1:], should_collect_logs) return siso.main(["siso", "ninja"] + input_args[1:]) if not project: project = _siso_rbe_project() if not t_specified and project and not offline: print( 'Missing "use_remoteexec=true". No remote execution', file=sys.stderr, ) return siso.main(["siso", "ninja", "--offline"] + input_args[1:]) if os.path.exists(siso_marker): print( "Run gn clean before switching from siso to ninja in %s" % output_dir, file=sys.stderr, ) return 1 # Strip -o/--offline so ninja doesn't see them. input_args = [arg for arg in input_args if arg not in ("-o", "--offline")] # A large build (with or without RBE) tends to hog all system resources. # Depending on the operating system, we might have mechanisms available # to run at a lower priority, which improves this situation. if os.environ.get("NINJA_BUILD_IN_BACKGROUND") == "1": if sys.platform in ["darwin", "linux"]: # nice-level 10 is usually considered a good default for background # tasks. The niceness is inherited by child processes, so we can # just set it here for us and it'll apply to the build tool we # spawn later. os.nice(10) # On macOS and most Linux distributions, the default limit of open file # descriptors is too low (256 and 1024, respectively). # This causes a large j value to result in 'Too many open files' errors. # Check whether the limit can be raised to a large enough value. If yes, # use `ulimit -n .... &&` as a prefix to increase the limit when running # ninja. if sys.platform in ["darwin", "linux"]: # Increase the number of allowed open file descriptors to the maximum. fileno_limit, hard_limit = resource.getrlimit(resource.RLIMIT_NOFILE) if fileno_limit < hard_limit: try: resource.setrlimit(resource.RLIMIT_NOFILE, (hard_limit, hard_limit)) except Exception: pass fileno_limit, hard_limit = resource.getrlimit( resource.RLIMIT_NOFILE) ninja_args = ['ninja'] num_cores = multiprocessing.cpu_count() if not j_specified and not t_specified: if not offline and use_remoteexec: ninja_args.append("-j") default_core_multiplier = 80 if platform.machine() in ("x86_64", "AMD64"): # Assume simultaneous multithreading and therefore half as many # cores as logical processors. num_cores //= 2 core_multiplier = int( os.environ.get("NINJA_CORE_MULTIPLIER", default_core_multiplier)) j_value = num_cores * core_multiplier core_limit = int(os.environ.get("NINJA_CORE_LIMIT", j_value)) j_value = min(j_value, core_limit) # On Windows, a -j higher than 1000 doesn't improve build times. # On macOS, ninja is limited to at most FD_SETSIZE (1024) open file # descriptors. if sys.platform in ["darwin", "win32"]: j_value = min(j_value, 1000) # Use a j value that reliably works with the open file descriptors # limit. if sys.platform in ["darwin", "linux"]: j_value = min(j_value, int(fileno_limit * 0.8)) ninja_args.append("%d" % j_value) else: j_value = num_cores # Ninja defaults to |num_cores + 2| j_value += int(os.environ.get("NINJA_CORE_ADDITION", "2")) ninja_args.append("-j") ninja_args.append("%d" % j_value) if summarize_build: # Enable statistics collection in Ninja. ninja_args += ["-d", "stats"] ninja_args += input_args[1:] if summarize_build: # Print the command-line to reassure the user that the right settings # are being used. _print_cmd(ninja_args) with android_build_server_helper.build_server_context( build_id, output_dir, use_android_build_server=use_android_build_server): if use_reclient and not t_specified: return reclient_helper.run_ninja(ninja_args, should_collect_logs) return ninja.main(ninja_args) def _upload_ninjalog(args, exit_code, build_duration): warnings.simplefilter("ignore", ResourceWarning) # Run upload script without wait. creationflags = 0 if platform.system() == "Windows": creationflags = subprocess.CREATE_NEW_PROCESS_GROUP cmd = [ sys.executable, _NINJALOG_UPLOADER, "--exit_code", str(exit_code), "--build_duration", str(int(build_duration)), "--cmdline", ] + args[1:] subprocess.Popen( cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, start_new_session=True, creationflags=creationflags, ) def main(args): start = time.time() # Generate Build ID randomly. # This ID is expected to be used consistently in all build tools. build_id = os.environ.get("AUTONINJA_BUILD_ID") if not build_id: build_id = str(uuid.uuid4()) os.environ.setdefault("AUTONINJA_BUILD_ID", build_id) # Check the log collection opt-in/opt-out status, and display notice if necessary. should_collect_logs = build_telemetry.enabled() # On Windows the autoninja.bat script passes along the arguments enclosed in # double quotes. This prevents multiple levels of parsing of the special '^' # characters needed when compiling a single file but means that this script # gets called with a single argument containing all of the actual arguments, # separated by spaces. When this case is detected we need to do argument # splitting ourselves. This means that arguments containing actual spaces # are not supported by autoninja, but that is not a real limitation. input_args = args exit_code = 127 if sys.platform.startswith("win") and len(args) == 2: input_args = args[:1] + args[1].split() try: exit_code = _main_inner(input_args, build_id, should_collect_logs) except KeyboardInterrupt: exit_code = 1 finally: if should_collect_logs: elapsed = time.time() - start _upload_ninjalog(input_args, exit_code, elapsed) return exit_code if __name__ == "__main__": sys.exit(main(sys.argv))