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translator.py

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#!/usr/bin/env python

import os, sys, traceback, json

from python_to_pythonjs import main as python_to_pythonjs

from pythonjs import main as pythonjs_to_javascript

from pythonjs_to_dart import main as pythonjs_to_dart

from pythonjs_to_coffee import main as pythonjs_to_coffee

from pythonjs_to_lua import main as pythonjs_to_lua

from pythonjs_to_luajs import main as pythonjs_to_luajs

from pythonjs_to_go import main as pythonjs_to_go

cmdhelp = """\

usage: translator.py [--dart|--coffee|--lua|--go|--visjs|--no-wrapper|--analyze] file.py

example:

translator.py --no-wrapper myscript.py > myscript.js

"""

def main(script, module_path=None):

if '--visjs' in sys.argv:

import python_to_visjs

return python_to_visjs.main( script )

else:

code = ''

res = None

if '--go' in sys.argv:

a = python_to_pythonjs(script, go=True, module_path=module_path)

code = pythonjs_to_go( a )

elif '--gopherjs' in sys.argv:

a = python_to_pythonjs(script, go=True, module_path=module_path)

code = pythonjs_to_go( a )

exe = os.path.expanduser('~/go/bin/gopherjs')

if not os.path.isfile(exe):

raise RuntimeError('gopherjs not installed to ~/go/bin/gopherjs')

import subprocess

path = '/tmp/gopherjs-input.go'

open(path, 'wb').write(code)

subprocess.check_call([exe, 'build', path], cwd='/tmp')

code = open('/tmp/gopherjs-input.js', 'rb').read()

elif '--dart' in sys.argv:

a = python_to_pythonjs(script, dart=True, module_path=module_path)

code = pythonjs_to_dart( a )

elif '--coffee' in sys.argv:

a = python_to_pythonjs(script, coffee=True, module_path=module_path)

code = pythonjs_to_coffee( a )

elif '--lua' in sys.argv:

a = python_to_pythonjs(script, lua=True, module_path=module_path)

try: code = pythonjs_to_lua( a )

except SyntaxError:

err = traceback.format_exc()

lineno = 0

for line in err.splitlines():

if "<unknown>" in line:

lineno = int(line.split()[-1])

b = a.splitlines()[ lineno ]

sys.stderr.write( '\n'.join([err,b]) )

elif '--luajs' in sys.argv: ## converts back to javascript

a = python_to_pythonjs(script, lua=True, module_path=module_path)

code = pythonjs_to_luajs( a )

else:

a = python_to_pythonjs(script, module_path=module_path)

if isinstance(a, dict):

res = {}

for jsfile in a:

res[ jsfile ] = pythonjs_to_javascript( a[jsfile], webworker=jsfile != 'main' )

return res

else:

## requirejs module is on by default, this wraps the code in a `define` function

## and returns `__module__`

## if --no-wrapper is used, then the raw javascript is returned.

code = pythonjs_to_javascript( a, requirejs='--no-wrapper' not in sys.argv )

if '--analyze' in sys.argv:

dartanalyzer = os.path.expanduser('~/dart-sdk/bin/dartanalyzer')

#dart2js = os.path.expanduser('~/dart-sdk/bin/dart2js')

assert os.path.isfile( dartanalyzer )

x = python_to_pythonjs(script, dart=True, module_path=module_path)

dartcode = pythonjs_to_dart( x )

path = '/tmp/debug.dart'

open(path, 'wb').write( dartcode )

import subprocess

try:

subprocess.check_output( [dartanalyzer, path] )

except subprocess.CalledProcessError as err:

dartcodelines = dartcode.splitlines()

for line in err.output.splitlines():

if line.startswith('[error]'):

a,b = line.split( path )

a = a[:-1]

print( '\x1B[0;31m' + a + '\x1B[0m' )

lineno = int( b.split('line ')[-1].split(',')[0] )

print('line: %s' %lineno)

print( dartcodelines[lineno-1] )

sys.exit(1)

if res: ## dict return

return res

else:

return code

def command():

if '-h' in sys.argv or '--help' in sys.argv:

print(cmdhelp)

return

mpath = None

scripts = []

if len(sys.argv) > 1:

for arg in sys.argv[1:]:

if arg.endswith('.py') or arg.endswith('.html'):

scripts.append( arg )

if mpath is None:

mpath = os.path.split(arg)[0]

if len(scripts):

a = []

for script in scripts:

a.append( open(script, 'rb').read() )

data = '\n'.join( a )

else:

data = sys.stdin.read()

js = main(data, module_path=mpath)

if isinstance(js, dict):

print( json.dumps(js) )

else:

print(js)

if __name__ == '__main__':

command()