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#!/usr/bin/env python

import sys, os
import re
import traceback
import itertools
VERBOSE=False

def version_file(val=None):
v = "VERSION"
if os.path.exists(v):
if val is None:
with open(v) as f:
return f.read().strip()
else:
with open(v, 'w') as f:
f.write(val)
return True
version_file.desc = "VERSION"

def conf_file(val=None):
return replace("conf.py", re.compile("""(?P<pre>(?:version|release)\s*=\s*u?['"])(?P<version>[^'"]*)"""), val)
conf_file.desc = "conf.py"

def replace(filename, regex, val):
if not os.path.exists(filename):
return None
with open(filename) as f:
lines = f.read()
match = re.search(regex, lines)
if val is None:
return match.group('version') if match else None
elif match:
with open(filename, 'w') as f:
f.write(re.sub(regex, r"\g<pre>%s" % (val,), lines))
return True

def setup_py(val=None):
return replace("setup.py", re.compile("""(?P<pre>version\s*=\s*u?['"])(?P<version>[^'"]*)"""), val)
setup_py.desc = "setup.py"

version_strategies = [setup_py, version_file, conf_file]
def version_types():
versions = []
for strat in version_strategies:
value = _apply_strategy(strat)
if value:
versions.append(Version.parse(value, desc=strat.desc))
return versions

def set_version(new_version):
do = lambda s: _apply_strategy(s, new_version)
results = map(do, version_strategies)
successes = filter(bool, results)
return list(successes)

def _apply_strategy(strategy, new_version=None):
try:
return strategy(new_version)
except StandardError, e:
print >> sys.stderr, "[ error: %s (%s)]" % (e,strategy.desc)
if VERBOSE:
traceback.print_exc(file=sys.stderr)

def zip_cmp(pairs):
for pair in pairs:
c = cmp(*pair)
if c != 0:
return c
return 0

class Version(object):
@classmethod
def guess(cls):
version_types()[0]

@classmethod
def parse(cls, number, desc=None):
try:
components = map(VersionComponent.parse, number.split('.'))
except:
print >> sys.stderr, "Error parsing version number: %r%s" % (
number, (" (from " + desc + ")") if desc else '')
raise
return cls(components, desc=desc)

def __init__(self, components, desc=None):
assert not isinstance(components, basestring), "use Version.parse()"
self.number = '.'.join(map(str,components)) # XXX REMOVE
self.components = components
self.desc = desc

def __cmp__(self, other):
"""
>>> sort = lambda *strs: map(str, sorted([Version.parse(x) for x in strs]))
>>> sort('0.1','0.10','1.0')
['0.1', '0.10', '1.0']
>>> sort('1', '1-1', '1-pre','1-rc','1-rc1','1-post')
['1-pre', '1-rc', '1-rc1', '1', '1-1', '1-post']
>>> sort('1-post-pre', '1-post')
['1-post-pre', '1-post']
>>> Version.parse('0.1') == Version.parse('0.1.0')
True
>>> Version.parse('0.1') == Version.parse('0.1-0')
True
>>> Version.parse('0.1-1') == Version.parse('0.1-whatever1')
False
"""
filler = VersionComponent(0)
return zip_cmp(itertools.izip_longest(self.components, other.components, fillvalue=filler))

def next(self):
"""
Increment the version number *minimally*, according to the zero-install
version numbers spec (http://0install.net/interface-spec.html#versions):

>>> Version.parse('1.0').next()
Version('1.0-post')

>>> Version.parse('1.0-pre').next()
Version('1.0-pre1')
>>> Version.parse('1.0-pre1').next()
Version('1.0-pre2')

>>> Version.parse('1.0-post1-pre').next()
Version('1.0-post1-pre1')
>>> Version.parse('1.0-post1-pre1').next()
Version('1.0-post1-pre2')

>>> Version.parse('1.0-rc').next()
Version('1.0-rc1')
>>> Version.parse('1.0-rc1').next()
Version('1.0-rc2')

>>> Version.parse('1.0-post').next()
Version('1.0-post1')
>>> Version.parse('1.0-post1').next()
Version('1.0-post2')
>>> Version.parse('1.0-post07').next()
Version('1.0-post8')
>>> Version.parse('1.0-post9').next()
Version('1.0-post10')

# arbitrary suffixes are supported, if present:
>>> Version.parse('1.0-foo').next()
Version('1.0-foo1')
"""

last = self.components[-1]
components = self.components[:-1] + [last.next()]
return Version(components)

def increment(self, levels=1):
"""
Increment the version component at `levels` least-significant
position (1 is the least significant):

>>> Version.parse('1.2.3').increment()
Version('1.2.4')
>>> Version.parse('1.2.3').increment(2)
Version('1.3.0')
>>> Version.parse('1.2.3').increment(3)
Version('2.0.0')

-pre, -rc and -post suffixes are handled also:

>>> Version.parse('0.1.3-pre').increment()
Version('0.1.3')
>>> Version.parse('0.1.3-post').increment()
Version('0.1.4')
>>> Version.parse('0.1.3-post').increment(2)
Version('0.2.0')
>>> Version.parse('0.1.3-rc').increment()
Version('0.1.3')

"""
before, middle, after = rsplit_list(self.components, levels)
middle = middle.increment()
after = [VersionComponent(0) for part in after]
all_parts = before + [middle] + after
return Version(components=all_parts)

def suffix(self, suf):
version, old_suf = split_suffix(self.number)
return Version.parse("%s-%s" % (version, suf))

def __str__(self):
return str(self.number)

def describe(self):
return "%-8s (%s)" % (self.desc, self.number)

def __repr__(self):
return "Version(%r)" % (self.number,)

def __nonzero__(self):
return self.number is not None

def __hash__(self):
"""

>>> list(sorted(set(map(Version.parse, ("0.1", "0.2", "0.1")))))
[Version('0.1'), Version('0.2')]
"""
return hash(self.number)

def prompt(msg):
if sys.stdin.isatty():
return raw_input(msg).strip().lower() in ('y','yes','')
else:
return True

def main(opts, input=None):
"""
>>> # hacky stuff to mock out functionality
>>> import version
>>> def set_version(new):
... print ":: new %s" % (new,)
... return [True]
>>> def version_types():
... return [Version.parse('0.1.2', 'fake')]
>>> version.version_types = version_types
>>> version.set_version = set_version
>>> version.prompt = lambda *a: True
>>> class Object(object):
... def __init__(self, **k):
... [setattr(self, k, v) for k, v in k.items()]
... def __getattr__(self, k): return None

>>> version.main(Object(suffix='post'))
fake (0.1.2)
:: new 0.1.2-post
changed version in 1 files.

>>> version.main(Object(suffix='post'), '+')
fake (0.1.2)
:: new 0.1.3-post
changed version in 1 files.

>>> version.main(Object(suffix='pre'), '++')
fake (0.1.2)
:: new 0.2.0-pre
changed version in 1 files.

>>> version.main(Object(raw=True))
0.1.2
"""
versions = version_types()
if opts.raw:
print versions[0]
return
else:
print "\n".join([version.describe() for version in versions])
if input or opts.suffix:
new_version = get_version(input, versions)
if opts.suffix:
new_version = new_version.suffix(opts.suffix)

ok = prompt("\nchange version to %s? " % (new_version.number,))
if not ok:
sys.exit(0)
changed = set_version(new_version.number)
print "changed version in %s files." % (len(changed),)

def get_version(input, current_versions):
"""
>>> get_version('1234', [])
Version('1234')
>>> get_version('+', [Version.parse('0.1.2')])
Version('0.1.3')
>>> get_version('+', [Version.parse('0.1.9')])
Version('0.1.10')
>>> get_version('+', [Version.parse('0.1')])
Version('0.2')

>>> get_version('++', [Version.parse('0.1.2')])
Version('0.2.0')
>>> get_version('++', [Version.parse('0.1')])
Version('1.0')

>>> get_version(None, [Version.parse('0.1')])
Version('0.1')

>>> get_version('.', [Version.parse('0.1')])
Version('0.1-post')

"""
if input is None:
return current_versions[0]
if all([char == '+' for char in input]):
return current_versions[0].increment(len(input))
elif input == 'date':
import time
v = time.strftime("%Y%m%d.%H%M")
return Version.parse(v)
elif input == '=':
return current_versions[0]
elif input == '.':
return current_versions[0].next()
else:
return Version.parse(input)

def rsplit_list(parts, idx):
"""splits a version at idx from the lest-significant portion (starting at 1):
>>> rsplit_list([0,1,2], 1)
([0, 1], 2, [])
>>> rsplit_list([0,1,2], 2)
([0], 1, [2])
>>> rsplit_list([0,1,2], 3)
([], 0, [1, 2])

>>> rsplit_list([0,1], 1)
([0], 1, [])
>>> rsplit_list([0,1], 2)
([], 0, [1])

>>> rsplit_list([0,1], 3)
([], 0, [1])
"""
middle = max(0, len(parts) - idx)
more_significant = parts[:middle]
less_significant = parts[middle+1:]
return (more_significant, parts[middle], less_significant)

def split(version, idx):
"""splits a version at idx from the lest-significant portion (starting at 1):

>>> split('0.1.2', 1)
(['0', '1'], '2', [])
>>> split('0.1.2', 2)
(['0'], '1', ['2'])
>>> split('0.1.2', 3)
([], '0', ['1', '2'])

>>> split('0.1', 1)
(['0'], '1', [])
>>> split('0.1', 2)
([], '0', ['1'])

>>> split('0.1', 3)
([], '0', ['1'])
"""
parts = version.split(".")
middle = max(0, len(parts) - idx)
more_significant = parts[:middle]
less_significant = parts[middle+1:]
return (more_significant, parts[middle], less_significant)


def split_suffix(part):
"""
Split a component into non-suffix and suffix component.
If no suffix present, return (part, None)

>>> split_suffix("1-pre")
('1', 'pre')
>>> split_suffix("2")
('2', None)
"""
if not '-' in part:
return (part, None)
return tuple(part.rsplit('-', 1))

class VersionComponent(object):
"""
>>> VersionComponent.parse("1").value
1
>>> VersionComponent.parse("1-pre2").suffixes
[pre2]
>>> VersionComponent.parse("1-pre2").suffixes[0].rank
2
>>> str(VersionComponent.parse("10-pre2"))
'10-pre2'
"""
@classmethod
def parse(cls, val):
if '-' in val:
vals = val.split('-')
value = vals[0]
suffixes = map(Suffix.parse, vals[1:])
else:
(value, suffixes) = (val, [])
value = int(value)
return cls(value, suffixes)

def __init__(self, value, suffixes=[]):
self.value = value
self.suffixes = suffixes

def __str__(self):
return '-'.join(map(str, [self.value] + self.suffixes))

def __cmp__(self, other):
my_parts = [self.value] + self.suffixes
other_parts = [other.value] + other.suffixes
return zip_cmp(itertools.izip_longest(my_parts, other_parts, fillvalue = Suffix(None)))

def next(self):
if not self.suffixes:
new_suffixes = [Suffix.parse(None).next()]
else:
new_suffixes = self.suffixes[:-1] + [self.suffixes[-1].next()]
return type(self)(self.value, new_suffixes)

def increment(self):
value = self.value + 1
if self.suffixes and self.suffixes[0] < Suffix():
# -pre or -rc increment by simply removing the suffix
value = self.value
return VersionComponent(value)

KNOWN_SUFFIXES = ['pre', 'rc', None, 'post']
class Suffix(object):
"""
>>> list(map(str, sorted([
... Suffix.parse('pre'),
... Suffix.parse('post'),
... Suffix.parse('rc'),
... Suffix.parse('pre1'),
... Suffix.parse('post1'),
... Suffix.parse('rc3'),
... Suffix.parse('pre2'),
... Suffix.parse(None),
... ])))
['pre', 'pre1', 'pre2', 'rc', 'rc3', '', 'post', 'post1']
>>> bool(Suffix.parse('pre'))
True
>>> bool(Suffix.parse(None))
False
"""
def __init__(self, name=None, rank=0):
self.name = name
self.rank = rank

@classmethod
def parse(cls, suffix):
if suffix is None:
return cls()
else:
name, rank = cls._split(suffix)
return cls(name, rank)

def __nonzero__(self):
return self.name is not None

def __repr__(self):
if self.name is None:
return ''
if self.rank is 0:
return str(self.name)
return ''.join(map(str, (self.name, self.rank)))

def next(self):
"""
>>> Suffix.parse('rc').next()
rc1
>>> Suffix.parse('rc9').next()
rc10
>>> Suffix.parse(None).next()
post
"""
if not self:
return Suffix('post', 0)
else:
return Suffix(self.name, self.rank + 1)

@classmethod
def _split(self, suffix):
"""
>>> Suffix._split('pre')
('pre', 0)
>>> Suffix._split('rc5')
('rc', 5)
>>> Suffix._split('rc11')
('rc', 11)
"""
first_digit = re.search('\d', suffix)
if first_digit is None:
return (suffix, 0)
first_digit = first_digit.start()
name = suffix[0:first_digit]
rank = int(suffix[first_digit:])
return (name, rank)

def __cmp__(self, other):
"""
>>> Suffix(None) == Suffix('',0)
True
"""
return cmp(
( self._name_ord(), self.rank),
(other._name_ord(), other.rank))

def _name_ord(self):
try:
return KNOWN_SUFFIXES.index(self.name or None)
except ValueError:
return len(KNOWN_SUFFIXES)


if __name__ == '__main__':
import optparse
p = optparse.OptionParser(usage="%prog [OPTIONS] [version]")
p.add_option('-v', '--verbose', action='store_true', help="print more debugging info", default=False)
p.add_option('-r', '--raw', action='store_true', help="print a single version string and nothing else")
p.add_option('--pre', action='store_const', const='pre', dest='suffix', help="set -pre suffix", default=None)
p.add_option('--rc', action='store_const', const='rc', dest='suffix', help="set -rc suffix")
p.add_option('--post', action='store_const', const='post',dest='suffix', help="set -post suffix")

opts, args = p.parse_args()
VERBOSE = opts.verbose

try:
main(opts, *args)
except StandardError, e:
print >> sys.stderr, e
if VERBOSE: raise
except (KeyboardInterrupt, EOFError):
print ""
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