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A new `env.Run` method is added which allows to control the verbosity of builders output automatically depending on whether the "verbose" option is set. It also allows to optionally run any SCons commands in a subprocess using the existing `run_in_subprocess` method, unifying the interface. `Action` objects wrap all builder functions to include a short build message associated with any action. Notably, this removes quite verbose output generated by `make_doc_header` and `make_editor_icons_action` builders.
80 lines
2.8 KiB
Python
80 lines
2.8 KiB
Python
import os
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import sys
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import json
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import uuid
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import functools
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import subprocess
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# NOTE: The multiprocessing module is not compatible with SCons due to conflict on cPickle
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JSON_SERIALIZABLE_TYPES = (bool, int, float, str)
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def run_in_subprocess(builder_function):
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@functools.wraps(builder_function)
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def wrapper(target, source, env):
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# Convert SCons Node instances to absolute paths
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target = [node.srcnode().abspath for node in target]
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source = [node.srcnode().abspath for node in source]
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# Short circuit on non-Windows platforms, no need to run in subprocess
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if sys.platform not in ("win32", "cygwin"):
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return builder_function(target, source, env)
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# Identify module
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module_name = builder_function.__module__
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function_name = builder_function.__name__
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module_path = sys.modules[module_name].__file__
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if module_path.endswith(".pyc") or module_path.endswith(".pyo"):
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module_path = module_path[:-1]
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# Subprocess environment
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subprocess_env = os.environ.copy()
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subprocess_env["PYTHONPATH"] = os.pathsep.join([os.getcwd()] + sys.path)
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# Keep only JSON serializable environment items
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filtered_env = dict((key, value) for key, value in env.items() if isinstance(value, JSON_SERIALIZABLE_TYPES))
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# Save parameters
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args = (target, source, filtered_env)
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data = dict(fn=function_name, args=args)
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json_path = os.path.join(os.environ["TMP"], uuid.uuid4().hex + ".json")
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with open(json_path, "wt") as json_file:
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json.dump(data, json_file, indent=2)
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json_file_size = os.stat(json_path).st_size
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if env["verbose"]:
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print(
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"Executing builder function in subprocess: "
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"module_path=%r, parameter_file=%r, parameter_file_size=%r, target=%r, source=%r"
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% (module_path, json_path, json_file_size, target, source)
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)
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try:
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exit_code = subprocess.call([sys.executable, module_path, json_path], env=subprocess_env)
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finally:
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try:
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os.remove(json_path)
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except (OSError, IOError) as e:
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# Do not fail the entire build if it cannot delete a temporary file
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print(
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"WARNING: Could not delete temporary file: path=%r; [%s] %s" % (json_path, e.__class__.__name__, e)
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)
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# Must succeed
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if exit_code:
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raise RuntimeError(
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"Failed to run builder function in subprocess: module_path=%r; data=%r" % (module_path, data)
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)
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return wrapper
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def subprocess_main(namespace):
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with open(sys.argv[1]) as json_file:
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data = json.load(json_file)
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fn = namespace[data["fn"]]
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fn(*data["args"])
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