compile ngspice with emscripten (WIP)

ngspice_emscripten.py

# this is WIP and does NOT produce a working result.

import os
import shutil
import subprocess as sp
 
NG_SPICE_25 = 'http://netcologne.dl.sourceforge.net/project/ngspice/ng-spice-rework/25/ngspice-25.tar.gz'
NG_SPICE_26 = 'http://optimate.dl.sourceforge.net/project/ngspice/ng-spice-rework/26/ngspice-26.tar.gz'
 
 
# build own llvm
"""
cd ~
svn co http://llvm.org/svn/llvm-project/llvm/tags/RELEASE_32/final llvm32
cd llvm32/tools
svn co http://llvm.org/svn/llvm-project/cfe/tags/RELEASE_32/final clang
cd ../projects
svn co http://llvm.org/svn/llvm-project/compiler-rt/tags/RELEASE_32/final compiler-rt
cd ../..
mkdir llvm32build
cd llvm32build
cmake -DCMAKE_BUILD_TYPE=Release -G "Unix Makefiles" -DLLVM_BUILD_EXAMPLES=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_BUILD_TESTS=OFF -DLLVM_INCLUDE_TESTS=OFF ../llvm32
make
"""
 
 
def bold(message):
    print '\033[1m' + message + '\033[0m'
 
 
def call(cmd):
    bold(cmd[0] + ' ' + ' '.join(repr(part) for part in cmd[1:]))
    return sp.call(cmd)
 
 
def main():
    base_dir = os.path.abspath('.')
 
    assert sp.Popen(['ngmakeidx']).wait() == 0, 'ngspice must be installed'
 
    # download emscript, if needed
    if not os.path.exists('emscripten'):
        call(['git', 'clone', 'https://github.com/kripken/emscripten.git'])
        # lets check if it got installed ok
        os.chdir('emscripten')
        call(['./emcc'])  # first call initializes emscripten
        call(['./em++', 'tests/hello_world.cpp'])
        assert call(['node', 'a.out.js']) == 0
        os.chdir(base_dir)
 
    # download ngspice
    version = NG_SPICE_25
    src_tar = version.split('/')[-1]
    src = src_tar.replace('.tar.gz', '')
    if not os.path.exists(src_tar):
        call(['wget', version])
 
    if os.path.exists(src):
        shutil.rmtree(src)
    call(['tar', '-xzf', src_tar])
 
    # actual build
    os.chdir(src)
    call([base_dir + '/emscripten/emconfigure', './configure', '--without-x'])
 
    # the build process runs ngmakeidx which is compiled during the process
    # since it is not available at the time
    bold('patch src/Makefile: use system ngmakeidx')
    makefile = open('src/Makefile').read()
    makefile = makefile.replace('./ngmakeidx', 'ngmakeidx')
    out = open('src/Makefile', 'w')
    out.write(makefile)
    out.close()
 
    call([base_dir + '/emscripten/emmake', 'make'])
 
    os.rename('src/ngspice', 'ngspice.bc')
    #
    call([base_dir + '/emscripten/emcc',
          '-s', 'ALLOW_MEMORY_GROWTH=1',
          '-s', 'TOTAL_MEMORY=52428800',
          'ngspice.bc', '-o', 'ngspice.js'])
 
if __name__ == '__main__':
    main()