46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
import os
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from lib import util
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def _openscad(in_path, out_path, deps_path):
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util.command([os.environ['OPENSCAD'], '-o', out_path, '-d', deps_path, in_path])
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def _write_dependencies(path, target, dependencies):
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util.write_file(path, '{}: {}\n'.format(target, ' '.join(dependencies)).encode())
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@util.main
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def main(in_path, out_path, deps_path):
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cwd = os.getcwd()
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def relpath(path):
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return os.path.relpath(path, cwd)
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with util.TemporaryDirectory() as temp_dir:
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temp_deps_path = os.path.join(temp_dir, 'deps')
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temp_mk_path = os.path.join(temp_dir, 'mk')
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temp_files_path = os.path.join(temp_dir, 'files')
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_, out_ext = os.path.splitext(out_path)
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# OpenSCAD requires the output file name to end in .stl or .dxf.
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temp_out_path = os.path.join(temp_dir, 'out' + out_ext)
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_openscad(in_path, temp_out_path, temp_deps_path)
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mk_content = '%:; echo "$@" >> {}'.format(util.bash_escape_string(temp_files_path))
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# Use make to parse the dependency makefile written by OpenSCAD.
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util.write_file(temp_mk_path, mk_content.encode())
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util.command(['make', '-s', '-B', '-f', temp_mk_path, '-f', temp_deps_path], remove_env = ['MAKELEVEL', 'MAKEFLAGS'])
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# All dependencies as paths relative to the project root.
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deps = set(map(relpath, util.read_file(temp_files_path).decode().splitlines()))
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# Relative paths to all files that should not appear in the dependency makefile.
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ignored_files = set(map(relpath, [in_path, temp_deps_path, temp_mk_path, temp_out_path]))
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# Write output files.
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_write_dependencies(deps_path, relpath(out_path), deps - ignored_files)
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util.rename_atomic(temp_out_path, out_path)
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