38 lines
1.5 KiB
Python
38 lines
1.5 KiB
Python
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import os
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def parse_config():
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em_config_file = os.getenv('EM_CONFIG') or os.path.expanduser('~/.emscripten')
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if not os.path.exists(em_config_file):
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raise RuntimeError("Emscripten configuration file '%s' does not exist" % em_config_file)
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normalized = {}
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em_config = {}
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with open(em_config_file) as f:
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try:
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# Emscripten configuration file is a Python file with simple assignments.
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exec(f.read(), em_config)
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except StandardError as e:
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raise RuntimeError("Emscripten configuration file '%s' is invalid:\n%s" % (em_config_file, e))
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normalized['EMCC_ROOT'] = em_config.get('EMSCRIPTEN_ROOT')
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normalized['NODE_JS'] = em_config.get('NODE_JS')
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normalized['CLOSURE_BIN'] = os.path.join(normalized['EMCC_ROOT'], 'node_modules', '.bin', 'google-closure-compiler')
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return normalized
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def run_closure_compiler(target, source, env, for_signature):
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cfg = parse_config()
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cmd = [cfg['NODE_JS'], cfg['CLOSURE_BIN']]
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cmd.extend(['--compilation_level', 'ADVANCED_OPTIMIZATIONS'])
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for f in env['JSEXTERNS']:
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cmd.extend(['--externs', f.get_abspath()])
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for f in source:
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cmd.extend(['--js', f.get_abspath()])
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cmd.extend(['--js_output_file', target[0].get_abspath()])
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return ' '.join(cmd)
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def create_engine_file(env, target, source, externs):
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if env['use_closure_compiler']:
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return env.BuildJS(target, source, JSEXTERNS=externs)
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return env.Textfile(target, [env.File(s) for s in source])
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