#hemingway

write drunk, edit sober - Ernest Hemingway

unfinished: work in progress

a tool for automated/semi-automated refactoring and dry-ing of your code:

hemingway example.py

Found 1 duplication

Hemingway has two modes of operation: automatic which is fully automated and uses certain heuristics and conventions to refactor your not-so-dry code

interactive which still find automatically similar code asks the programmer for important decisions in the refactoring process

Example of automatic mode:

hemingway example.py -a #-a / --automatic is the default mode

Found 2 cases of similar code:

#1

e = t(x, 4) #2
f = z(x, 4) #3

Refactored <0>(<1>, 4) to

def call_with_4(function, arg):
	return function(arg, 4)

e = call_with_4(t, x)
f = call_with_4(z, x)

#2

e = [l for l in t if even(l)]
f = [m for m in z if even(m)]
x = [a + 4 for a in z if even(a)]

Refactored [<0> for <1> in <2> if even(<1>)] to
def filter_even_map(sequence, mapping):
	return [mapping(a) for a in sequence if even(a)]

e = filter_even_map(t, lambda l: l)
f = filter_even_map(z, lambda m: m)
x = filter_even_map(z, lambda a: a + 4)

Example of interactive mode

hemingway example.py -i #-i / --interactive can be setup as default in .hemingway.yaml

configuration

you can setup a .hemingway.yaml file in the directory where you run it from or in your home folder

default_mode: automatic # can be interactive
aggresiveness: high     # can be medium or low

how does it work

Python AST ==Pattern Finder==> 
Patterns   ==RefactoringEngine==>
Refactoring Suggestions 
  ==AutomaticReplacer==> displays info and generates the refactored code
  ==InteractiveReplacer==> shows suggestions to the programmer with OK/do-that-instead dialogs

license

MIT License, Alexander Ivanov, 2016