flask/scripts/flaskext_migrate.py
Keyan Pishdadian 8488a3afa9 Change parsing format to use AST via RedBaron
Moved away from using manual parsing. Source is parsed using RedBaron to make the FST. Some import formats not yet implemented, and still some bugs to work out. However, the current script works well for the two cases in the file comments.
2015-02-11 13:07:24 -05:00

45 lines
1.4 KiB
Python

# CASE 1 - from flask.ext.foo import bam --> from flask_foo import bam
# CASE 2 - from flask.ext import foo --> import flask_foo as foo
from redbaron import RedBaron
import sys
def read_source(input_file):
with open(input_file, "r") as source_code:
red = RedBaron(source_code.read())
return red
def write_source(red, input_file):
with open(input_file, "w") as source_code:
source_code.write(red.dumps())
def fix_imports(red):
from_imports = red.find_all("FromImport")
for x in range(len(from_imports)):
values = from_imports[x].value
if (values[0].value == 'flask') and (values[1].value == 'ext'):
# Case 1
if len(from_imports[x].value) == 3:
package = values[2].value
modules = from_imports[x].modules()
r = "{}," * len(modules)
print modules
from_imports[x].replace("from flask_%s import %s"
% (package, r.format(*modules)[:-1]))
# Case 2
else:
module = from_imports[x].modules()[0]
from_imports[x].replace("import flask_%s as %s"
% (module, module))
return red
if __name__ == "__main__":
input_file = sys.argv[1]
ast = read_source(input_file)
new_ast = fix_imports(ast)
write_source(new_ast, input_file)