50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
import os
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from uuid import uuid4
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from SCons.Node.FS import File
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from SCons.Action import Action
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from SCons.Defaults import Delete
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from SCons.Util import is_List
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from SCons.Errors import UserError
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def install_marker(target):
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with open(target.abspath, "w") as fd:
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fd.write(
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"Dummy file to represent the completion of a virtual action.\n"
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"Modifying or removing this file will force rebuild.\n"
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"\n"
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f"Unique hash: {uuid4().hex}\n"
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)
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def virtual_target_command(env, marker, condition, source, action):
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if not isinstance(marker, File):
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raise UserError("`marker` must be a File")
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if not condition(env) and os.path.exists(marker.abspath):
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# Condition has changed in our back, force rebuild
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env.Execute(Delete(marker))
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return env.Command(
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marker,
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source,
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[
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*(action if is_List(action) else [action]),
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Action(
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lambda target, source, env: install_marker(target[0]),
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"Write $TARGET to mark task complete",
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),
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],
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)
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### Scons tool hooks ###
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def generate(env):
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env.AddMethod(virtual_target_command, "VirtualTargetCommand")
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def exists(env):
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return True
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