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#!/usr/bin/python
import os, sys, subprocess
COMPILER_ENGINE = None
abspath = os.path.abspath(os.path.dirname(__file__))
def path_from_root(*pathelems):
return os.path.join(os.path.sep, *(abspath.split(os.sep) + list(pathelems)))
exec(open(path_from_root('tools', 'shared.py'), 'r').read())
COMPILER = path_from_root('src', 'compiler.js')
def emscripten(filename, settings, outfile):
data = open(filename, 'r').read()
try:
cwd = os.getcwd()
except:
cwd = None
os.chdir(os.path.dirname(COMPILER))
subprocess.Popen(COMPILER_ENGINE + [COMPILER], stdin=subprocess.PIPE, stdout=outfile, stderr=subprocess.STDOUT).communicate(settings+'\n'+data)
if outfile: outfile.close()
if cwd is not None:
os.chdir(cwd)
if __name__ == '__main__':
if sys.argv.__len__() not in range(2,6):
print '''
Emscripten usage: emscripten.py INFILE [PATH-TO-JS-ENGINE] [SETTINGS] [OUTPUT_FILE]
INFILE must be in human-readable LLVM disassembly form (i.e., as text,
not binary).
PATH-TO-JS-ENGINE should be a path to the JavaScript engine used to
run the compiler (which is in JavaScript itself). You can later use
the same engine to run the code, or another one, that is a separate
issue. If you do not provide this parameter, you should define
COMPILER_ENGINE = ... in a file at ~/.emscripten.
SETTINGS is an optional set of compiler settings, overriding the defaults.
OUTPUT_FILE is the file to create with the output. If not given, we write
to stdout
'''
else:
if len(sys.argv) >= 3:
COMPILER_ENGINE = [sys.argv[2]]
settings = sys.argv[3] if len(sys.argv) >= 4 else "{}"
outfile = open(sys.argv[4], 'w') if len(sys.argv) >= 5 else None
emscripten(sys.argv[1], settings, outfile)
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