Python-CoffeeScript/coffeescript/__init__.py at master · doloopwhile/Python-CoffeeScript · GitHub

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#!/usr/bin/env python3

# -*- coding: ascii -*-

from __future__ import division, unicode_literals, print_function

import pkg_resources

# Released under the MIT license. See `LICENSE` for details.

'''

Python CoffeeScript is a bridge to the JS CoffeeScript compiler.

A short example:

>>> import coffeescript

>>> print(coffeescript.compile('add = (a, b) -> a + b'))

(function() {

var add;

add = function(a, b) {

return a + b;

};

}).call(this);

'''

# A value of __spam__ have to be wrapped with str().

# It is because that __spam__ must be a instance of str() in 2.x and

# "xxxx" is a instance of unicode() due to unicode_literals.

__license__ = str("MIT License")

# The following __version__ is not DRY.

# Same information can be got from setup.py.

# However, __version__ should provited by __init__.py for user-friendliness.

# On the other hand, it is impossible that `from coffeescript import __version__`

# in spite of a dependency on execjs.

# i.e. the import in setup.py fails if execjs has not been installed yet.

__version__ = str("2.0.3")

__all__ = str('''

compile

compile_file

Compiler

EngineError

CompilationError

get_runtime

get_compiler_script

''').split()

import io

import execjs

EngineError = execjs.RuntimeError

CompilationError = execjs.ProgramError

try:

_BaseString = basestring

except NameError:

_BaseString = (str, bytes)

class Compiler:

'''Wrapper of execution of CoffeeScript compiler script'''

def __init__(self, compiler_script, runtime):

'''compiler_script is a CoffeeScript compiler script in JavaScript.

runtime is a instance of execjs.Runtime.

'''

self._compiler_script = compiler_script

self._runtime = runtime

def compile(self, script, bare=False):

'''compile a CoffeeScript code to a JavaScript code.

if bare is True, then compile the JavaScript without the top-level

function safety wrapper (like the coffee command).

'''

if not hasattr(self, '_context'):

self._context = self._runtime.compile(self._compiler_script)

return self._context.call(

"CoffeeScript.compile", script, {'bare': bare})

def compile_file(self, filename, encoding="utf-8", bare=False):

'''compile a CoffeeScript script file to a JavaScript code.

filename can be a list or tuple of filenames,

then contents of files are concatenated with line feeds.

if bare is True, then compile the JavaScript without the top-level

function safety wrapper (like the coffee command).

'''

if isinstance(filename, _BaseString):

filename = [filename]

scripts = []

for f in filename:

with io.open(f, encoding=encoding) as fp:

scripts.append(fp.read())

return self.compile('\n\n'.join(scripts), bare=bare)

def compile(script, bare=False):

return _default_compiler().compile(script, bare=bare)

compile.__doc__ = Compiler.compile.__doc__

def compile_file(filename, encoding="utf-8", bare=False):

return _default_compiler().compile_file(

filename, encoding=encoding, bare=bare)

compile_file.__doc__ = Compiler.compile_file.__doc__

def get_compiler_script():

'''returns a CoffeeScript compiler script in JavaScript.

which is used in coffeescript.compile() and coffeescript.compile_file()

'''

return pkg_resources.resource_string(

'coffeescript', 'coffeescript.js').decode('utf-8')

def get_runtime():

'''returns an appropriate instance of execjs.Runtime

which is used in coffeescript.compile() and coffeescript.compile_file()

'''

return execjs.get()

_compiler = None

def _default_compiler():

global _compiler

if _compiler is None:

_compiler = Compiler(

get_compiler_script(),

get_runtime()

)

return _compiler

Python-CoffeeScript/coffeescript/__init__.py at master · doloopwhile/Python-CoffeeScript · GitHub

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