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#!/usr/bin/env python2
'''
Fast static linker for emscripten outputs. Specifically this links asm.js modules.
Usage: emlink.py [main module] [side module] [output name]
Main module should be built with -s MAIN_MODULE=1 (and possibly -s DISABLE_GL_EMULATION=1, if you do not need GL emulation)
Side module should be built with -s SIDE_MODULE=1
Note that the output file can be used as a main module, so you can link multiple
side modules into a main module that way.
'''
import os, subprocess, sys
from tools import shared
from tools import js_optimizer
try:
me, main, side, out = sys.argv[:4]
except:
print >> sys.stderr, 'usage: emlink.py [main module] [side module] [output name]'
sys.exit(1)
print 'Main module:', main
print 'Side module:', side
print 'Output:', out
class AsmModule():
def __init__(self, filename):
self.js = open(filename).read()
# imports
imports_js = self.js[self.js.find(js_optimizer.start_asm_marker):self.js.rfind(js_optimizer.start_funcs_marker)]
self.imports = [m.group(0) for m in js_optimizer.import_sig.finditer(imports_js)]
#print 'imports', self.imports
# funcs
funcs_js = self.js[self.js.find(js_optimizer.start_funcs_marker):self.js.rfind(js_optimizer.end_funcs_marker)]
self.funcs = [m.group(2) for m in js_optimizer.func_sig.finditer(funcs_js)]
#print 'funcs', self.funcs
# exports
def relocate(self, main):
# Find function name replacements TODO: do not rename duplicate names with duplicate contents, just merge them
main_funcs = set(main.funcs)
replacements = {}
for i in range(len(self.funcs)):
rep = func = self.funcs[i]
while rep in main_funcs:
rep += '_'
replacements[func] = rep
print replacements
def write(self, out):
open(out, 'w').write(self.js)
main = AsmModule(main)
side = AsmModule(side)
side.relocate(main)
#main.write(out)
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