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hartsantler
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new command line option --analyzer for translator.py, trigger code analysis and debugging using dartanalyzer from the Dart SDK.
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Lines changed: 103 additions & 66 deletions

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‎README.md‎

Lines changed: 7 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -59,14 +59,20 @@ will be converted into JavaScript.
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Usage::
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translator.py [--dart|--coffee|--lua|--no-wrapper] file.py
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translator.py [--help|--dart|--coffee|--lua|--no-wrapper|--analyzer] file.py
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Examples::
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cd pythonjs
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./translator.py myscript.py > myscript.js
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./translator.py myapp.html > app.html
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The option `--no-wrapper` will output the raw JavaScript, by default the output is wrapped as a requirejs module.
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The option `--analyzer` requires the Dart SDK is installed to your home directory: `~/dart-sdk`,
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if this option is used then your script is also translated using the dart backend and fed to
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`dartanalyzer` which will perform static analysis of your code. Dartanalyzer is able to catch many types of errors, like: missing functions, invalid names, calling a function with the wrong argument types. The quality of the analysis will depend on how much type information can be
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inferred from your code, combined with the variables you have manually typed. If dartanalyzer detects an error in your code, translation will abort, and debugging information is printed.
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Extra Python Syntax
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-------------------

‎pythonjs/translator.py‎

Lines changed: 96 additions & 65 deletions
Original file line numberDiff line numberDiff line change
@@ -9,81 +9,112 @@
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from pythonjs_to_luajs import main as pythonjs_to_luajs
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cmdhelp = """\
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usage: translator.py [--dart|--coffee|--lua] file.py
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translator.py --visjs file.py\
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usage: translator.py [--dart|--coffee|--lua|--visjs|--no-wrapper|--analyze] file.py
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example:
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translator.py --no-wrapper myscript.py > myscript.js
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"""
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def main(script, module_path=None):
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if '--visjs' in sys.argv:
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import python_to_visjs
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return python_to_visjs.main( script )
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else:
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code = ''
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if '--dart' in sys.argv:
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a = python_to_pythonjs(script, dart=True, module_path=module_path)
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code = pythonjs_to_dart( a )
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elif '--coffee' in sys.argv:
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a = python_to_pythonjs(script, coffee=True, module_path=module_path)
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code = pythonjs_to_coffee( a )
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elif '--lua' in sys.argv:
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a = python_to_pythonjs(script, lua=True, module_path=module_path)
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try: code = pythonjs_to_lua( a )
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except SyntaxError:
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err = traceback.format_exc()
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lineno = 0
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for line in err.splitlines():
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if "<unknown>" in line:
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lineno = int(line.split()[-1])
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if '--visjs' in sys.argv:
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import python_to_visjs
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return python_to_visjs.main( script )
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else:
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code = ''
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res = None
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if '--dart' in sys.argv:
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a = python_to_pythonjs(script, dart=True, module_path=module_path)
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code = pythonjs_to_dart( a )
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elif '--coffee' in sys.argv:
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a = python_to_pythonjs(script, coffee=True, module_path=module_path)
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code = pythonjs_to_coffee( a )
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elif '--lua' in sys.argv:
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a = python_to_pythonjs(script, lua=True, module_path=module_path)
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try: code = pythonjs_to_lua( a )
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except SyntaxError:
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err = traceback.format_exc()
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lineno = 0
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for line in err.splitlines():
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if "<unknown>" in line:
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lineno = int(line.split()[-1])
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b = a.splitlines()[ lineno ]
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sys.stderr.write( '\n'.join([err,b]) )
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elif '--luajs' in sys.argv: ## converts back to javascript
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a = python_to_pythonjs(script, lua=True, module_path=module_path)
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code = pythonjs_to_luajs( a )
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else:
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a = python_to_pythonjs(script, module_path=module_path)
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if isinstance(a, dict):
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res = {}
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for jsfile in a:
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res[ jsfile ] = pythonjs_to_javascript( a[jsfile], webworker=jsfile != 'main' )
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return res
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else:
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## requirejs module is on by default, this wraps the code in a `define` function
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## and returns `__module__`
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## if --no-wrapper is used, then the raw javascript is returned.
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code = pythonjs_to_javascript( a, requirejs='--no-wrapper' not in sys.argv )
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if '--analyze' in sys.argv:
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dartanalyzer = os.path.expanduser('~/dart-sdk/bin/dartanalyzer')
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#dart2js = os.path.expanduser('~/dart-sdk/bin/dart2js')
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assert os.path.isfile( dartanalyzer )
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b = a.splitlines()[ lineno ]
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sys.stderr.write( '\n'.join([err,b]) )
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elif '--luajs' in sys.argv: ## converts back to javascript
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a = python_to_pythonjs(script, lua=True, module_path=module_path)
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code = pythonjs_to_luajs( a )
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else:
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a = python_to_pythonjs(script, module_path=module_path)
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if isinstance(a, dict):
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res = {}
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for jsfile in a:
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res[ jsfile ] = pythonjs_to_javascript( a[jsfile], webworker=jsfile != 'main' )
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return res
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else:
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## requirejs module is on by default, this wraps the code in a `define` function
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## and returns `__module__`
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## if --no-wrapper is used, then the raw javascript is returned.
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code = pythonjs_to_javascript( a, requirejs='--no-wrapper' not in sys.argv )
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x = python_to_pythonjs(script, dart=True, module_path=module_path)
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dartcode = pythonjs_to_dart( x )
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path = '/tmp/debug.dart'
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open(path, 'wb').write( dartcode )
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import subprocess
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try:
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subprocess.check_output( [dartanalyzer, path] )
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except subprocess.CalledProcessError as err:
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dartcodelines = dartcode.splitlines()
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for line in err.output.splitlines():
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if line.startswith('[error]'):
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a,b = line.split( path )
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a = a[:-1]
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print( '\x1B[0;31m' + a + '\x1B[0m' )
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lineno = int( b.split('line ')[-1].split(',')[0] )
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print('line: %s' %lineno)
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print( dartcodelines[lineno-1] )
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sys.exit(1)
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return code
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if res: ## dict return
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return res
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else:
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return code
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def command():
60-
if '-h' in sys.argv or '--help' in sys.argv:
61-
print(cmdhelp)
62-
return
91+
if '-h' in sys.argv or '--help' in sys.argv:
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print(cmdhelp)
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return
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64-
mpath = None
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scripts = []
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if len(sys.argv) > 1:
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for arg in sys.argv[1:]:
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if arg.endswith('.py') or arg.endswith('.html'):
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scripts.append( arg )
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if mpath is None:
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mpath = os.path.split(arg)[0]
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mpath = None
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scripts = []
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if len(sys.argv) > 1:
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for arg in sys.argv[1:]:
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if arg.endswith('.py') or arg.endswith('.html'):
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scripts.append( arg )
101+
if mpath is None:
102+
mpath = os.path.split(arg)[0]
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73-
if len(scripts):
74-
a = []
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for script in scripts:
76-
a.append( open(script, 'rb').read() )
77-
data = '\n'.join( a )
78-
else:
79-
data = sys.stdin.read()
104+
if len(scripts):
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a = []
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for script in scripts:
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a.append( open(script, 'rb').read() )
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data = '\n'.join( a )
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else:
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data = sys.stdin.read()
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js = main(data, module_path=mpath)
82-
if isinstance(js, dict):
83-
print( json.dumps(js) )
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else:
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print(js)
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js = main(data, module_path=mpath)
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if isinstance(js, dict):
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print( json.dumps(js) )
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else:
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print(js)
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if __name__ == '__main__':
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command()
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command()

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