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114 lines
4.1 KiB
114 lines
4.1 KiB
__all__ = ['require']
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import subprocess, os, codecs, glob
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from .evaljs import translate_js
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import six
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DID_INIT = False
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DIRNAME = os.path.dirname(os.path.abspath(__file__))
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PY_NODE_MODULES_PATH = os.path.join(DIRNAME, 'py_node_modules')
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def _init():
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global DID_INIT
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if DID_INIT:
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return
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assert subprocess.call(
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'node -v', shell=True, cwd=DIRNAME
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) == 0, 'You must have node installed! run: brew install node'
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assert subprocess.call(
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'cd %s;npm install babel-core babel-cli babel-preset-es2015 babel-polyfill babelify browserify'
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% repr(DIRNAME),
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shell=True,
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cwd=DIRNAME) == 0, 'Could not link required node_modules'
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DID_INIT = True
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ADD_TO_GLOBALS_FUNC = '''
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;function addToGlobals(name, obj) {
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if (!Object.prototype.hasOwnProperty('_fake_exports')) {
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Object.prototype._fake_exports = {};
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}
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Object.prototype._fake_exports[name] = obj;
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};
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'''
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# subprocess.call("""node -e 'require("browserify")'""", shell=True)
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GET_FROM_GLOBALS_FUNC = '''
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;function getFromGlobals(name) {
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if (!Object.prototype.hasOwnProperty('_fake_exports')) {
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throw Error("Could not find any value named "+name);
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}
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if (Object.prototype._fake_exports.hasOwnProperty(name)) {
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return Object.prototype._fake_exports[name];
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} else {
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throw Error("Could not find any value named "+name);
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}
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};
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'''
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def require(module_name, include_polyfill=False, update=False):
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assert isinstance(module_name, str), 'module_name must be a string!'
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py_name = module_name.replace('-', '_')
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module_filename = '%s.py' % py_name
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var_name = py_name.rpartition('/')[-1]
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if not os.path.exists(os.path.join(PY_NODE_MODULES_PATH,
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module_filename)) or update:
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_init()
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in_file_name = 'tmp0in439341018923js2py.js'
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out_file_name = 'tmp0out439341018923js2py.js'
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code = ADD_TO_GLOBALS_FUNC
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if include_polyfill:
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code += "\n;require('babel-polyfill');\n"
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code += """
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var module_temp_love_python = require(%s);
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addToGlobals(%s, module_temp_love_python);
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""" % (repr(module_name), repr(module_name))
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with open(os.path.join(DIRNAME, in_file_name), 'wb') as f:
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f.write(code.encode('utf-8') if six.PY3 else code)
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pkg_name = module_name.partition('/')[0]
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# make sure the module is installed
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assert subprocess.call(
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'cd %s;npm install %s' % (repr(DIRNAME), pkg_name),
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shell=True,
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cwd=DIRNAME
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) == 0, 'Could not install the required module: ' + pkg_name
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# convert the module
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assert subprocess.call(
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'''node -e "(require('browserify')('./%s').bundle(function (err,data) {fs.writeFile('%s', require('babel-core').transform(data, {'presets': require('babel-preset-es2015')}).code, ()=>{});}))"'''
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% (in_file_name, out_file_name),
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shell=True,
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cwd=DIRNAME,
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) == 0, 'Error when converting module to the js bundle'
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os.remove(os.path.join(DIRNAME, in_file_name))
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with codecs.open(os.path.join(DIRNAME, out_file_name), "r",
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"utf-8") as f:
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js_code = f.read()
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os.remove(os.path.join(DIRNAME, out_file_name))
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js_code += GET_FROM_GLOBALS_FUNC
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js_code += ';var %s = getFromGlobals(%s);%s' % (
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var_name, repr(module_name), var_name)
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print('Please wait, translating...')
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py_code = translate_js(js_code)
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dirname = os.path.dirname(
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os.path.join(PY_NODE_MODULES_PATH, module_filename))
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if not os.path.isdir(dirname):
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os.makedirs(dirname)
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with open(os.path.join(PY_NODE_MODULES_PATH, module_filename),
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'wb') as f:
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f.write(py_code.encode('utf-8') if six.PY3 else py_code)
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else:
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with codecs.open(
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os.path.join(PY_NODE_MODULES_PATH, module_filename), "r",
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"utf-8") as f:
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py_code = f.read()
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context = {}
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exec (py_code, context)
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return context['var'][var_name].to_py()
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