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makefile2dot.py
executable file
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makefile2dot.py
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
"""
Created on Sep 29, 2010
@author: vak
"""
from sys import stdin, stdout, stderr
import unittest
import sys
def _line_emitter(input):
line_to_emit = ""
for line in input:
if line.endswith("\\"):
line_to_emit += line[:-1]
# print >>stderr, "line_to_emit=<%s>" % line_to_emit
else:
line_to_emit += line
yield line_to_emit
line_to_emit = ""
import re
_pat_colon = re.compile(":")
def _dependency_emitter(lines):
for line in lines:
if (
len(line) == 0
or line[0] in ["\t", "#"]
or line.find("=") > 0
or line.find("?") > 0
):
continue
parts = _pat_colon.split(line)
if len(parts) == 1:
continue
elif len(parts) == 2:
if len(parts[1]) == 0 or parts[1][0] != "=":
yield tuple(parts)
else:
print >> stderr, 'more then one ":" not yet implemented ;)\n got the following:\n%s' % parts
_pat_whitespacing = re.compile("[ \t]+")
def _single_dot_dep_emitter(out_deps_pairs):
for outs_str, deps_str in out_deps_pairs:
for out in _pat_whitespacing.split(outs_str.strip()):
yield '\t"%s"\n' % out
deps = _pat_whitespacing.split(deps_str.strip())
for dep in deps:
if dep:
if dep[0] == "#":
break
yield '\t"%s" -> "%s"\n' % (dep, out)
def makefile2dot():
"""
Visalizer of Makefiles.
Don't even think we use a grammar parser.
"""
stdout.write('digraph G {\n\trankdir="BT"\n')
for line in _single_dot_dep_emitter(
_dependency_emitter(_line_emitter("".join(stdin).split("\n")))
):
stdout.write(line)
stdout.write("}\n")
class Test(unittest.TestCase):
def test_emitters(self):
self.assertEqual(list(_line_emitter([""])), [""])
self.assertEqual(list(_line_emitter(["", ""])), ["", ""])
self.assertEqual(list(_line_emitter(["a", "b"])), ["a", "b"])
self.assertEqual(list(_line_emitter(["a\\", "b", "c"])), ["ab", "c"])
self.assertEqual(list(_dependency_emitter(_line_emitter([""]))), [])
self.assertEqual(
list(
_dependency_emitter(
_line_emitter(["macro", "out:dep1\\", " dep2", "\tcommand"])
)
),
[("out", "dep1 dep2")],
)
self.assertEqual(
list(
_dependency_emitter(
_line_emitter(
[
"macro",
"out:dep1\\",
" dep2",
"\tcommand",
"out2:dep3\\",
" dep4",
"\tcommand2",
]
)
)
),
[("out", "dep1 dep2"), ("out2", "dep3 dep4")],
)
self.assertEqual(
list(_dependency_emitter(_line_emitter(["default:", "", ""]))),
[("default", "")],
)
inp = [
"macro",
"out:dep1\\",
" dep2",
"\tcommand",
"",
"out2:dep3\\",
" dep4",
"\tcommand2",
]
self.assertEqual(
list(_single_dot_dep_emitter(_dependency_emitter(_line_emitter(inp)))),
[
'\t"out"\n',
'\t"dep1" -> "out"\n',
'\t"dep2" -> "out"\n',
'\t"out2"\n',
'\t"dep3" -> "out2"\n',
'\t"dep4" -> "out2"\n',
],
)
inp = ["default:", "\techo"]
self.assertEqual(
list(_single_dot_dep_emitter(_dependency_emitter(_line_emitter(inp)))),
['\t"default"\n'],
)
if __name__ == "__main__":
# import sys;sys.argv = ['', 'Test.testName']
# unittest.main()
if len(sys.argv) > 1:
print >> stderr, "Usage:\n\tmakefile2dot <Makefile >out.dot\nor\n\tmakefile2dot <Makefile |dot -Tpng > out.png"
else:
makefile2dot()