513 lines
22 KiB
Python
Vendored
513 lines
22 KiB
Python
Vendored
# MIT License
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#
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# Copyright 2020 MongoDB Inc.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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"""Generate build.ninja files from SCons aliases."""
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import importlib
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import os
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import traceback
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import subprocess
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import sys
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import SCons
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import SCons.Script
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import SCons.Tool.ninja.Globals
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from SCons.Script import GetOption
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from SCons.Util import sanitize_shell_env
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from .Globals import NINJA_RULES, NINJA_POOLS, NINJA_CUSTOM_HANDLERS, NINJA_DEFAULT_TARGETS, NINJA_CMDLINE_TARGETS
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from .Methods import register_custom_handler, register_custom_rule_mapping, register_custom_rule, register_custom_pool, \
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set_build_node_callback, get_generic_shell_command, CheckNinjaCompdbExpand, get_command, \
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gen_get_response_file_command
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from .Overrides import ninja_hack_linkcom, ninja_hack_arcom, NinjaNoResponseFiles, ninja_always_serial, AlwaysExecAction
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from .Utils import ninja_add_command_line_options, \
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ninja_noop, ninja_print_conf_log, ninja_csig, ninja_contents, ninja_stat, ninja_whereis, NinjaExperimentalWarning
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try:
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import ninja
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NINJA_BINARY = ninja.__file__
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except ImportError:
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NINJA_BINARY = False
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else:
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from .NinjaState import NinjaState
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NINJA_STATE = None
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def ninja_builder(env, target, source):
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"""Generate a build.ninja for source."""
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if not isinstance(source, list):
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source = [source]
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if not isinstance(target, list):
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target = [target]
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# We have no COMSTR equivalent so print that we're generating
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# here.
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print("Generating:", str(target[0]))
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generated_build_ninja = target[0].get_abspath()
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try:
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NINJA_STATE.generate()
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except Exception:
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raise SCons.Errors.BuildError(
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errstr=f"ERROR: an exception occurred while generating the ninja file:\n{traceback.format_exc()}",
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node=target)
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if env["PLATFORM"] == "win32":
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# TODO: Is this necessary as you set env variable in the ninja build file per target?
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# this is not great, its doesn't consider specific
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# node environments, which means on linux the build could
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# behave differently, because on linux you can set the environment
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# per command in the ninja file. This is only needed if
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# running ninja directly from a command line that hasn't
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# had the environment setup (vcvarsall.bat)
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with open('run_ninja_env.bat', 'w') as f:
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for key in env['ENV']:
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f.write('set {}={}\n'.format(key, env['ENV'][key]))
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f.write(f'{NINJA_STATE.ninja_bin_path} -f {generated_build_ninja} %*\n')
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cmd = ['run_ninja_env.bat']
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else:
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cmd = [NINJA_STATE.ninja_bin_path, '-f', generated_build_ninja]
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if str(env.get("NINJA_DISABLE_AUTO_RUN")).lower() not in ['1', 'true']:
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num_jobs = env.get('NINJA_MAX_JOBS', env.GetOption("num_jobs"))
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cmd += ['-j' + str(num_jobs)] + env.get('NINJA_CMD_ARGS', '').split() + NINJA_CMDLINE_TARGETS
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print(f"ninja will be run with command line targets: {' '.join(NINJA_CMDLINE_TARGETS)}")
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print("Executing:", str(' '.join(cmd)))
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# execute the ninja build at the end of SCons, trying to
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# reproduce the output like a ninja build would
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def execute_ninja():
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if env['PLATFORM'] == 'win32':
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spawn_env = os.environ
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else:
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spawn_env = sanitize_shell_env(env['ENV'])
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proc = subprocess.Popen(cmd,
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stderr=sys.stderr,
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stdout=subprocess.PIPE,
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universal_newlines=True,
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env=spawn_env
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)
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yield from iter(proc.stdout.readline, "")
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proc.stdout.close()
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return_code = proc.wait()
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if return_code:
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raise subprocess.CalledProcessError(return_code, 'ninja')
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erase_previous = False
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for output in execute_ninja():
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output = output.strip()
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if erase_previous:
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sys.stdout.write('\x1b[2K') # erase previous line
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sys.stdout.write("\r")
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else:
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sys.stdout.write(os.linesep)
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sys.stdout.write(output)
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sys.stdout.flush()
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# this will only erase ninjas [#/#] lines
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# leaving warnings and other output, seems a bit
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# prone to failure with such a simple check
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erase_previous = output.startswith('[')
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sys.stdout.write("\n")
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def options(opts) -> None:
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"""
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Add command line Variables for Ninja builder.
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"""
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opts.AddVariables(
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("NINJA_CMD_ARGS", "Arguments to pass to ninja"),
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)
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def exists(env):
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"""Enable if called."""
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if 'ninja' not in GetOption('experimental'):
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return False
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# This variable disables the tool when storing the SCons command in the
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# generated ninja file to ensure that the ninja tool is not loaded when
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# SCons should do actual work as a subprocess of a ninja build. The ninja
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# tool is very invasive into the internals of SCons and so should never be
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# enabled when SCons needs to build a target.
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if env.get("__NINJA_NO", "0") == "1":
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return False
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# pypi ninja module detection done at top of file during import ninja.
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if NINJA_BINARY:
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return NINJA_BINARY
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else:
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raise SCons.Warnings.SConsWarning("Failed to import ninja, attempt normal SCons build.")
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def ninja_emitter(target, source, env):
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""" fix up the source/targets """
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ninja_file = env.File(env.subst("$NINJA_FILE_NAME"))
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ninja_file.attributes.ninja_file = True
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# Someone called env.Ninja('my_targetname.ninja')
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if not target and len(source) == 1:
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target = source
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# Default target name is $NINJA_PREFIX.$NINJA.SUFFIX
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if not target:
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target = [ninja_file, ]
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# No source should have been passed. Drop it.
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if source:
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source = []
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return target, source
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def generate(env):
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"""Generate the NINJA builders."""
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global NINJA_STATE, NINJA_CMDLINE_TARGETS
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if 'ninja' not in GetOption('experimental'):
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return
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if not SCons.Tool.ninja.Globals.ninja_builder_initialized:
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SCons.Tool.ninja.Globals.ninja_builder_initialized = True
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ninja_add_command_line_options()
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if not NINJA_BINARY:
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raise SCons.Warnings.SConsWarning("Failed to import ninja, attempt normal SCons build.")
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env["NINJA_DISABLE_AUTO_RUN"] = env.get("NINJA_DISABLE_AUTO_RUN", GetOption('disable_execute_ninja'))
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env["NINJA_FILE_NAME"] = env.get("NINJA_FILE_NAME", "build.ninja")
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# Add the Ninja builder.
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always_exec_ninja_action = AlwaysExecAction(ninja_builder, {})
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ninja_builder_obj = SCons.Builder.Builder(action=always_exec_ninja_action,
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emitter=ninja_emitter)
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env.Append(BUILDERS={"Ninja": ninja_builder_obj})
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env["NINJA_ALIAS_NAME"] = env.get("NINJA_ALIAS_NAME", "generate-ninja")
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env['NINJA_DIR'] = env.Dir(env.get("NINJA_DIR", '#/.ninja'))
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env["NINJA_SCONS_DAEMON_KEEP_ALIVE"] = env.get("NINJA_SCONS_DAEMON_KEEP_ALIVE", 180000)
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if GetOption("disable_ninja"):
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env.SConsignFile(os.path.join(str(env['NINJA_DIR']), '.ninja.sconsign'))
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# here we allow multiple environments to construct rules and builds
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# into the same ninja file
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if NINJA_STATE is None:
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ninja_file = env.Ninja()
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env['NINJA_FILE'] = ninja_file[0]
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env.AlwaysBuild(ninja_file)
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# We need to force SCons to only build the ninja target when ninja tool is loaded.
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# The ninja tool is going to 'rip the guts out' of scons and make it basically unable
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# to do anything in terms of building, so any targets besides the ninja target will
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# end up doing nothing besides causing confusion. We save the targets however, so that
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# SCons and invoke ninja to build them in lieu of the user.
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NINJA_CMDLINE_TARGETS = SCons.Script.BUILD_TARGETS
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SCons.Script.BUILD_TARGETS = SCons.Script.TargetList(env.Alias("$NINJA_ALIAS_NAME", ninja_file))
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else:
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if str(NINJA_STATE.ninja_file) != env["NINJA_FILE_NAME"]:
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SCons.Warnings.SConsWarning("Generating multiple ninja files not supported, set ninja file name before tool initialization.")
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ninja_file = [NINJA_STATE.ninja_file]
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def ninja_generate_deps(env):
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"""Return a list of SConscripts
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TODO: Should we also include files loaded from site_scons/***
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or even all loaded modules? https://stackoverflow.com/questions/4858100/how-to-list-imported-modules
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TODO: Do we want this to be Nodes?
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"""
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return sorted([str(s) for s in SCons.Node.SConscriptNodes])
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env['_NINJA_REGENERATE_DEPS_FUNC'] = ninja_generate_deps
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env['NINJA_REGENERATE_DEPS'] = env.get('NINJA_REGENERATE_DEPS', '${_NINJA_REGENERATE_DEPS_FUNC(__env__)}')
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# This adds the required flags such that the generated compile
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# commands will create depfiles as appropriate in the Ninja file.
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if 'CCDEPFLAGS' not in env:
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# Issue some warning here
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pass
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else:
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env.Append(CCFLAGS='$CCDEPFLAGS')
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env.AddMethod(CheckNinjaCompdbExpand, "CheckNinjaCompdbExpand")
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# Provide a way for custom rule authors to easily access command
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# generation.
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env.AddMethod(get_generic_shell_command, "NinjaGetGenericShellCommand")
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env.AddMethod(get_command, "NinjaGetCommand")
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env.AddMethod(gen_get_response_file_command, "NinjaGenResponseFileProvider")
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env.AddMethod(set_build_node_callback, "NinjaSetBuildNodeCallback")
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# Provides a way for users to handle custom FunctionActions they
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# want to translate to Ninja.
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env[NINJA_CUSTOM_HANDLERS] = {}
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env.AddMethod(register_custom_handler, "NinjaRegisterFunctionHandler")
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# Provides a mechanism for inject custom Ninja rules which can
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# then be mapped using NinjaRuleMapping.
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env[NINJA_RULES] = {}
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env.AddMethod(register_custom_rule, "NinjaRule")
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# Provides a mechanism for inject custom Ninja pools which can
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# be used by providing the NINJA_POOL="name" as an
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# OverrideEnvironment variable in a builder call.
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env[NINJA_POOLS] = {}
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env.AddMethod(register_custom_pool, "NinjaPool")
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# Add the ability to register custom NinjaRuleMappings for Command
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# builders. We don't store this dictionary in the env to prevent
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# accidental deletion of the CC/XXCOM mappings. You can still
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# overwrite them if you really want to but you have to explicit
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# about it this way. The reason is that if they were accidentally
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# deleted you would get a very subtly incorrect Ninja file and
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# might not catch it.
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env.AddMethod(register_custom_rule_mapping, "NinjaRuleMapping")
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# on windows we need to change the link action
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ninja_hack_linkcom(env)
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# Normally in SCons actions for the Program and *Library builders
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# will return "${*COM}" as their pre-subst'd command line. However
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# if a user in a SConscript overwrites those values via key access
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# like env["LINKCOM"] = "$( $ICERUN $)" + env["LINKCOM"] then
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# those actions no longer return the "bracketted" string and
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# instead return something that looks more expanded. So to
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# continue working even if a user has done this we map both the
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# "bracketted" and semi-expanded versions.
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def robust_rule_mapping(var, rule, tool) -> None:
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provider = gen_get_response_file_command(env, rule, tool)
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env.NinjaRuleMapping("${" + var + "}", provider)
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# some of these construction vars could be generators, e.g.
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# CommandGeneratorAction, so if the var is not a string, we
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# can't parse the generated string.
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if isinstance(env.get(var), str):
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env.NinjaRuleMapping(env.get(var, None), provider)
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robust_rule_mapping("CCCOM", "CC", "$CC")
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robust_rule_mapping("SHCCCOM", "CC", "$CC")
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robust_rule_mapping("CXXCOM", "CXX", "$CXX")
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robust_rule_mapping("SHCXXCOM", "CXX", "$CXX")
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robust_rule_mapping("LINKCOM", "LINK", "$LINK")
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robust_rule_mapping("SHLINKCOM", "LINK", "$SHLINK")
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robust_rule_mapping("ARCOM", "AR", "$AR")
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# Make SCons node walk faster by preventing unnecessary work
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env.Decider("timestamp-match")
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# Used to determine if a build generates a source file. Ninja
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# requires that all generated sources are added as order_only
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# dependencies to any builds that *might* use them.
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# TODO: switch to using SCons to help determine this (Github Issue #3624)
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env["NINJA_GENERATED_SOURCE_SUFFIXES"] = env.get('NINJA_GENERATED_SOURCE_SUFFIXES', [".h", ".hpp"])
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# Force ARCOM so use 's' flag on ar instead of separately running ranlib
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ninja_hack_arcom(env)
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if GetOption('disable_ninja'):
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return env
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print("Initializing ninja tool... this feature is experimental. SCons internals and all environments will be affected.")
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print(f"SCons running in ninja mode. {env['NINJA_FILE']} will be generated.")
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# This is the point of no return, anything after this comment
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# makes changes to SCons that are irreversible and incompatible
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# with a normal SCons build. We return early if __NINJA_NO=1 has
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# been given on the command line (i.e. by us in the generated
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# ninja file) here to prevent these modifications from happening
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# when we want SCons to do work. Everything before this was
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# necessary to setup the builder and other functions so that the
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# tool can be unconditionally used in the users's SCons files.
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if not exists(env):
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return
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# Set a known variable that other tools can query so they can
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# behave correctly during ninja generation.
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env["GENERATING_NINJA"] = True
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# These methods are no-op'd because they do not work during ninja
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# generation, expected to do no work, or simply fail. All of which
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# are slow in SCons. So we overwrite them with no logic.
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SCons.Node.FS.File.make_ready = ninja_noop
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SCons.Node.FS.File.prepare = ninja_noop
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SCons.Node.FS.File.push_to_cache = ninja_noop
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SCons.Executor.Executor.prepare = ninja_noop
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SCons.Taskmaster.Task.prepare = ninja_noop
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SCons.Node.FS.File.built = ninja_noop
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SCons.Node.Node.visited = ninja_noop
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# We make lstat a no-op because it is only used for SONAME
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# symlinks which we're not producing.
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SCons.Node.FS.LocalFS.lstat = ninja_noop
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# This is a slow method that isn't memoized. We make it a noop
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# since during our generation we will never use the results of
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# this or change the results.
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SCons.Node.FS.is_up_to_date = ninja_noop
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# We overwrite stat and WhereIs with eternally memoized
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# implementations. See the docstring of ninja_stat and
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# ninja_whereis for detailed explanations.
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SCons.Node.FS.LocalFS.stat = ninja_stat
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SCons.Util.WhereIs = ninja_whereis
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# Monkey patch get_csig and get_contents for some classes. It
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# slows down the build significantly and we don't need contents or
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# content signatures calculated when generating a ninja file since
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# we're not doing any SCons caching or building.
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SCons.Executor.Executor.get_contents = ninja_contents(
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SCons.Executor.Executor.get_contents
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)
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SCons.Node.Alias.Alias.get_contents = ninja_contents(
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SCons.Node.Alias.Alias.get_contents
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)
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SCons.Node.FS.File.get_contents = ninja_contents(SCons.Node.FS.File.get_contents)
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SCons.Node.FS.File.get_csig = ninja_csig(SCons.Node.FS.File.get_csig)
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SCons.Node.FS.Dir.get_csig = ninja_csig(SCons.Node.FS.Dir.get_csig)
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SCons.Node.Alias.Alias.get_csig = ninja_csig(SCons.Node.Alias.Alias.get_csig)
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# Ignore CHANGED_SOURCES and CHANGED_TARGETS. We don't want those
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# to have effect in a generation pass because the generator
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# shouldn't generate differently depending on the current local
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# state. Without this, when generating on Windows, if you already
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# had a foo.obj, you would omit foo.cpp from the response file. Do the same for UNCHANGED.
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SCons.Executor.Executor._get_changed_sources = SCons.Executor.Executor._get_sources
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SCons.Executor.Executor._get_changed_targets = SCons.Executor.Executor._get_targets
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SCons.Executor.Executor._get_unchanged_sources = SCons.Executor.Executor._get_sources
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SCons.Executor.Executor._get_unchanged_targets = SCons.Executor.Executor._get_targets
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# Replace false action messages with nothing.
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env["PRINT_CMD_LINE_FUNC"] = ninja_print_conf_log
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# This reduces unnecessary subst_list calls to add the compiler to
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# the implicit dependencies of targets. Since we encode full paths
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# in our generated commands we do not need these slow subst calls
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# as executing the command will fail if the file is not found
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# where we expect it.
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env["IMPLICIT_COMMAND_DEPENDENCIES"] = False
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# This makes SCons more aggressively cache MD5 signatures in the
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# SConsign file.
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# TODO: WPD shouldn't this be set to 0?
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env.SetOption("max_drift", 1)
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# The Serial job class is SIGNIFICANTLY (almost twice as) faster
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# than the Parallel job class for generating Ninja files. So we
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# monkey the Jobs constructor to only use the Serial Job class.
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SCons.Taskmaster.Job.Jobs.__init__ = ninja_always_serial
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ninja_syntax = importlib.import_module(".ninja_syntax", package='ninja')
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if NINJA_STATE is None:
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NINJA_STATE = NinjaState(env, ninja_file[0], ninja_syntax)
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# TODO: this is hacking into scons, preferable if there were a less intrusive way
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# We will subvert the normal builder execute to make sure all the ninja file is dependent
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# on all targets generated from any builders
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|
SCons_Builder_BuilderBase__execute = SCons.Builder.BuilderBase._execute
|
|
|
|
def NinjaBuilderExecute(self, env, target, source, overwarn={}, executor_kw={}):
|
|
# this ensures all environments in which a builder executes from will
|
|
# not create list actions for linking on windows
|
|
ninja_hack_linkcom(env)
|
|
targets = SCons_Builder_BuilderBase__execute(self, env, target, source, overwarn=overwarn, executor_kw=executor_kw)
|
|
|
|
if not SCons.Util.is_List(target):
|
|
target = [target]
|
|
|
|
for target in targets:
|
|
if target.check_attributes('ninja_file') is None and not target.is_conftest():
|
|
env.Depends(ninja_file, targets)
|
|
return targets
|
|
SCons.Builder.BuilderBase._execute = NinjaBuilderExecute
|
|
|
|
# Here we monkey patch the Task.execute method to not do a bunch of
|
|
# unnecessary work. If a build is a regular builder (i.e not a conftest and
|
|
# not our own Ninja builder) then we add it to the NINJA_STATE. Otherwise we
|
|
# build it like normal. This skips all of the caching work that this method
|
|
# would normally do since we aren't pulling any of these targets from the
|
|
# cache.
|
|
#
|
|
# In the future we may be able to use this to actually cache the build.ninja
|
|
# file once we have the upstream support for referencing SConscripts as File
|
|
# nodes.
|
|
def ninja_execute(self) -> None:
|
|
|
|
target = self.targets[0]
|
|
if target.get_env().get('NINJA_SKIP'):
|
|
return
|
|
if target.check_attributes('ninja_file') is None:
|
|
NINJA_STATE.add_build(target)
|
|
else:
|
|
target.build()
|
|
|
|
SCons.Taskmaster.Task.execute = ninja_execute
|
|
|
|
# Make needs_execute always return true instead of determining out of
|
|
# date-ness.
|
|
SCons.Script.Main.BuildTask.needs_execute = lambda x: True
|
|
|
|
def ninja_Set_Default_Targets(env, tlist) -> None:
|
|
"""
|
|
Record the default targets if they were ever set by the user. Ninja
|
|
will need to write the default targets and make sure not to include
|
|
the scons daemon shutdown target.
|
|
"""
|
|
SCons.Script._Get_Default_Targets = SCons.Script._Set_Default_Targets_Has_Been_Called
|
|
SCons.Script.DEFAULT_TARGETS = ninja_file
|
|
for t in tlist:
|
|
if isinstance(t, SCons.Node.Node):
|
|
NINJA_DEFAULT_TARGETS.append(t)
|
|
else:
|
|
nodes = env.arg2nodes(t, env.fs.Entry)
|
|
NINJA_DEFAULT_TARGETS.extend(nodes)
|
|
SCons.Script._Set_Default_Targets = ninja_Set_Default_Targets
|
|
|
|
# We will eventually need to overwrite TempFileMunge to make it
|
|
# handle persistent tempfiles or get an upstreamed change to add
|
|
# some configurability to it's behavior in regards to tempfiles.
|
|
#
|
|
# Set all three environment variables that Python's
|
|
# tempfile.mkstemp looks at as it behaves differently on different
|
|
# platforms and versions of Python.
|
|
# build_dir = env.subst("$NINJA_DIR")
|
|
# if build_dir == "":
|
|
# build_dir = "."
|
|
# os.environ["TMPDIR"] = env.Dir("{}/.response_files".format(build_dir)).get_abspath()
|
|
# os.environ["TEMP"] = os.environ["TMPDIR"]
|
|
# os.environ["TMP"] = os.environ["TMPDIR"]
|
|
# if not os.path.isdir(os.environ["TMPDIR"]):
|
|
# env.Execute(SCons.Defaults.Mkdir(os.environ["TMPDIR"]))
|
|
|
|
env['TEMPFILEDIR'] = "$NINJA_DIR/.response_files"
|
|
env["TEMPFILE"] = NinjaNoResponseFiles
|
|
|
|
env.Alias('run-ninja-scons-daemon', 'run_ninja_scons_daemon_phony')
|
|
env.Alias('shutdown-ninja-scons-daemon', 'shutdown_ninja_scons_daemon_phony')
|