requires.txt is not mandatory for metadata generator

pipdeps/pipdeps.py

@@ -2,22 +2,30 @@
 pipdeps
 """
 import argparse
+import itertools
 import json
-import distutils.version
 import os
+import platform
 import pprint
 import re
 import subprocess
 import sys
-import urllib2
 import tarfile
 import tempfile
+import urllib2
 import zipfile
-import wheel.metadata
 
 import tabulate
 import packaging.specifiers
 import packaging.version
+import pip._internal.utils.misc
+import wheel.metadata
+
+# https://www.python.org/dev/peps/pep-0508/#environment-markers
+PY_VER = ".".join(map(str, sys.version_info[:2]))
+SYS_PLAT = sys.platform
+PLAT_PY_IMPL = platform.python_implementation()
+
 
 def arg_parse():
     """
@@ -35,117 +43,293 @@ def arg_parse():
                        action='store_true',
                        help="upgrade upgradeable packages")
     group.add_argument('-s', '--show',
-                       nargs='+',
+                       nargs='*',
                        help="show detailed info about upgradeable packages")
     return parser.parse_args()
 
-def get_pyver():
+def upgrade_package(data):
     """
-    return running python version
+    pip install --upgrade "<package>==<versions>"
     """
-    return ".".join(map(str, sys.version_info[:3]))
+    to_upgrade = []
+    for package, version in data:
+        to_upgrade.append("%s==%s" % (package, version))
+    subprocess.check_call(
+        ["pip", "install", "--upgrade", " ".join(to_upgrade)],
+        stderr=subprocess.STDOUT
+    )
 
-def is_strict_version(version):
+def get_json(url):
     """
-    Return true if version is strict, otherwise return false
+    Return url json
     """
-    try:
-        distutils.version.StrictVersion(version)
-    except ValueError:
-        return False
-    return True
+    return json.load(urllib2.urlopen(urllib2.Request(url)))
+
+def file_download(url):
+    """
+    Download file from url as temporary file
+    It returns file object
+    """
+    tmp_file = tempfile.NamedTemporaryFile(delete=False)
+    rfile = urllib2.urlopen(url)
+    with tmp_file as output:
+        output.write(rfile.read())
+    return tmp_file
+
+def merge_two_dicts(in_x, in_y):
+    """
+    Return merge of two dictionaries
+    """
+    out = in_x.copy()
+    out.update(in_y)
+    return out
+
+def is_version(version):
+    """
+    Return true if version satisfy regex, otherwise return false
+    """
+    if re.compile(r'^(\d+) \. (\d+) (\. (\d+))? (\. (\d+))?$', re.VERBOSE).search(version) or \
+       re.compile(r'^(\d+) \. (\d+) (\. (\d+))? (rc(\d+))?$', re.VERBOSE).search(version):
+        return True
+    return False
 
-def version_conform_specifiers(version, specifiers):
+def is_in_specifiers(version, specifiers):
     """
-    check if version conforms specifiers
+    Return true if version satisfy specifiers, otherwise return false
     """
     if not specifiers:
         return True
     elif version is None:
         return True
     else:
-        ver = packaging.version.Version(version)
-        spec = packaging.specifiers.SpecifierSet(",".join(specifiers))
-        if spec.contains(ver):
-            return True
-    return False
+        # https://github.com/pypa/packaging/pull/92
+        ver = packaging.version.LegacyVersion(version)
+        specifiers = [
+            packaging.specifiers.LegacySpecifier(s.strip()) for s in specifiers if s.strip()]
+    return all(s.contains(ver) for s in specifiers)
 
-def upgrade_package(package, versions):
+def is_in_conditions(condition):
     """
-    pip install --upgrade "<package><versions>"
+    Return true if condition satisfy sys_platform and python_version and
+    platform_python_implementation, otherwise return false
     """
-    subprocess.check_call(
-        ["pip", "install", "--upgrade", "%s==%s" % (package, "".join(versions))],
-        stderr=subprocess.STDOUT
-    )
+    if not condition:
+        return True
+    # pylint: disable=eval-used
+    return eval(
+        condition.replace("sys_platform", '"%s"' % SYS_PLAT) \
+                 .replace("python_version", '"%s"' % PY_VER) \
+                 .replace("platform_python_implementation", '"%s"' % PLAT_PY_IMPL))
 
-def get_pip_list():
+def is_in_extra(extra, req_extra):
     """
-    pip list
+    Return true if extra satisfy, otherwise return false
     """
-    outdated_packages = subprocess.check_output(["pip", "list"])
-    return [line.split()[0] for line in outdated_packages.strip().split("\n")[2:]]
+    if extra is None or extra in req_extra:
+        return True
+    return False
 
-def file_download(url):
+def specifiers_intersection(specifiers):
     """
-    Download file from url as temporary file
-    It returns file object
+    Return intersection of specifiers, otherwise return None
     """
-    tmp_file = tempfile.NamedTemporaryFile(delete=False)
-    rfile = urllib2.urlopen(url)
-    with tmp_file as output:
-        output.write(rfile.read())
-    return tmp_file
+    if not specifiers:
+        return []
+    specifiers = [packaging.specifiers.LegacySpecifier(s.strip()) for s in specifiers if s.strip()]
+    left_boarder = [s for s in specifiers if s.operator in ['>', '>=']]
+    if left_boarder:
+        max_left = sorted([s.version for s in left_boarder],
+                          key=packaging.specifiers.LegacyVersion, reverse=True)[0]
+        max_left_op = [s.operator for s in left_boarder if s.version == max_left]
+        if '>' in max_left_op:
+            max_left_op = '>'
+        else:
+            max_left_op = '>='
+    right_boarder = [s for s in specifiers if s.operator in ['<', '<=']]
+    if right_boarder:
+        min_right = sorted([s.version for s in right_boarder],
+                           key=packaging.specifiers.LegacyVersion)[0]
+        min_right_op = [s.operator for s in right_boarder if s.version == min_right]
+        if '<' in min_right_op:
+            min_right_op = '<'
+        else:
+            min_right_op = '<='
+    equals = [s for s in specifiers if s.operator in ['==']]
+    if equals:
+        cmp_v = list(set([s.version for s in equals]))[0]
+        if all([packaging.version.LegacyVersion(cmp_v) == packaging.version.LegacyVersion(item) \
+               for item in list(set([s.version for s in equals]))]):
+            equals = cmp_v
+        else:
+            return None
+    notequals = [s for s in specifiers if s.operator in ['!=']]
+    notequals = list(set([s.version for s in notequals]))
+    boarders = []
+    if left_boarder and right_boarder:
+        if packaging.version.LegacyVersion(max_left) > packaging.version.LegacyVersion(min_right):
+            return None
+        elif packaging.version.LegacyVersion(max_left) == \
+             packaging.version.LegacyVersion(min_right):
+            if max_left_op in ['>='] and min_right_op in ['<=']:
+                max_left_op = '=='
+                right_boarder = None
+            else:
+                return None
+    if left_boarder:
+        boarders.append("%s%s" % (max_left_op, max_left))
+    if right_boarder:
+        boarders.append("%s%s" % (min_right_op, min_right))
+    if boarders and notequals:
+        for item in notequals:
+            if is_in_specifiers(item, boarders):
+                boarders.append("!=%s" % item)
+    elif not boarders and notequals:
+        for item in notequals:
+            boarders.append("!=%s" % item)
+    if boarders and equals:
+        if is_in_specifiers(equals, boarders):
+            return ["==%s" % equals]
+        return None
+    elif not boarders and equals:
+        return ["==%s" % equals]
+    return boarders
 
-def get_jsonpipdeptree():
+def select_upkgs(data, rkey):
     """
-    pipdeptree --json-tree
+    Return data packages having requested key
     """
-    pipdeptree = subprocess.check_output(
-        ["pipdeptree", "--json-tree"],
-        stderr=subprocess.STDOUT
+    result = []
+    for pkg, pkg_data in data.iteritems():
+        if rkey in pkg_data.keys():
+            result.append(pkg)
+    return result
+
+def print_list(data):
+    """
+    Print upgradeable versions
+    """
+    upkgs = select_upkgs(data, 'upgradeable_version')
+    if not upkgs:
+        print "There is nothing to upgrade."
+        return 0
+    tab_data = []
+    for pkg in sorted(upkgs):
+        tab_data.append([pkg, data[pkg]['installed_version'], data[pkg]['upgradeable_version']])
+    print tabulate.tabulate(
+        tab_data,
+        ['package', 'installed_version', 'upgradeable_version']
     )
-    return json.loads(pipdeptree.strip())
+    return 1
 
-def get_json(url):
+def get_pkg_data():
     """
-    Return url json
+    Return package data
     """
-    return json.load(urllib2.urlopen(urllib2.Request(url)))
+    packages_data = {}
+    # pylint: disable=protected-access
+    for pkg in pip._internal.utils.misc.get_installed_distributions():
+        pkg_name, pkg_ver, _pkg_extra = pkginfo(str(pkg))
+        rev = {'installed_version': pkg_ver,
+               'requires': [pkginfo(str(dep), repair=True) for dep in pkg.requires()]}
+        packages_data[pkg_name] = rev
+    packages_data = insert_extras(packages_data)
+    packages_data = insert_availables(packages_data)
+    packages_data = insert_news(packages_data)
+
+    while True:
+        new_packages_data = new_packages(packages_data)
+        if not new_packages_data:
+            break
+        new_packages_data = insert_availables(new_packages_data)
+        new_packages_data = insert_news(new_packages_data)
+        packages_data = merge_two_dicts(packages_data, new_packages_data)
+    check_new_extras(packages_data)
+    return packages_data
 
-def json_search(jsonpipdeptree, package, key):
+def pkginfo(data, req_extra=None, repair=False):
     """
-    find package dependencies in json tree
+    Return parsed pkginfo
     """
-    if isinstance(jsonpipdeptree, dict):
-        keys = jsonpipdeptree.keys()
-        if 'package_name' in keys and key in keys:
-            if re.search(r'^%s$' % package, jsonpipdeptree['package_name'], re.IGNORECASE):
-                yield jsonpipdeptree[key]
-        for child_val in json_search(jsonpipdeptree['dependencies'], package, key):
-            yield child_val
-    elif isinstance(jsonpipdeptree, list):
-        for item in jsonpipdeptree:
-            for item_val in json_search(item, package, key):
-                yield item_val
+    extra_match = re.compile(
+        r"""^(?P<package>.*?)(;\s*(?P<condition>.*?)(extra == '(?P<extra>.*?)')?)$""").search(data)
+    if extra_match:
+        groupdict = extra_match.groupdict()
+        condition = groupdict['condition']
+        extra = groupdict['extra']
+        package = groupdict['package']
+        if condition.endswith(' and '):
+            condition = condition[:-5]
+        mysearch = re.compile(r'(extra == .*)').search(condition)
+        if mysearch:
+            extra = mysearch.group(1)
+            condition = condition.replace(extra, '')
+            if not condition:
+                condition = None
+            extra = re.compile(r'extra == (.*)').search(extra).group(1).replace('"', "")
+    else:
+        condition, extra = None, None
+        package = data
+    if not is_in_conditions(condition):
+        return None
+    pkg_name, pkg_extra, pkg_ver = re.compile(
+        r'([\w\.\-]*)(\[\w*\])?(.*)').search(package).groups()
+    if pkg_extra:
+        pkg_extra = pkg_extra.replace("[", "").replace("]", "").lower()
+    pkg_ver = pkg_ver.replace("(", "").replace(")", "").strip()
+    if not pkg_ver:
+        pkg_ver = []
+    else:
+        if repair:
+            try:
+                pkg_ver = re.compile(r'^(\d.*)$').search(pkg_ver).group(1)
+            except AttributeError:
+                pass
+            pkg_ver = pkg_ver.split(",")
+    if not is_in_extra(extra, req_extra):
+        return None
+    return (pkg_name.lower(), pkg_ver, pkg_extra)
 
-def get_highest_version(package, data):
+def insert_extras(data):
     """
-    Return upgradeable version if possible, otherwise return installed version
+    Insert extras
     """
-    try:
-        version = data[package]['upgradeable_version']
-    except KeyError:
-        version = data[package]['installed_version']
-    return version
+    for key in data.keys():
+        extra = []
+        for pkg, pkg_data in data.iteritems():
+            for dep in pkg_data['requires']:
+                if dep[0] == key:
+                    if dep[2]:
+                        extra.append(dep[2])
+        data[key]['extras'] = extra
+        if extra:
+            # pylint: disable=protected-access
+            for pkg in pip._internal.utils.misc.get_installed_distributions():
+                pkg_name, _pkg_ver, _pkg_extra = pkginfo(str(pkg))
+                if pkg_name == key:
+                    data[key]['requires'] += [pkginfo(str(dep), repair=True, req_extra=extra) \
+                                              for dep in pkg.requires(extras=extra)]
+    return data
 
-def find_available_vers(package_name, pyver):
+def insert_availables(data):
     """
-    Return descending list of available strict version
+    Insert available versions
+    """
+    for pkg, pkg_data in data.iteritems():
+        if 'available_version' in pkg_data.keys():
+            continue
+        try:
+            data[pkg]['available_version'] = get_available_vers(pkg)
+        except urllib2.HTTPError:
+            data[pkg]['available_version'] = []
+    return data
+
+def get_available_vers(package):
+    """
+    Return descending list of public available strict version
     """
     versions = []
     try:
-        data = get_json("https://pypi.python.org/pypi/%s/json" % (package_name,))
+        data = get_json("https://pypi.python.org/pypi/%s/json" % (package))
     except urllib2.HTTPError, err:
         print "%s %s" % (err, err.url)
         raise urllib2.HTTPError(err.url, err.code, None, err.hdrs, err.fp)
@@ -154,41 +338,108 @@ def find_available_vers(package_name, pyver):
         requires_python = []
         for item in data["releases"][release]:
             if item['requires_python'] is not None:
-                requires_python.append(item['requires_python'])
-        if is_strict_version(release) and version_conform_specifiers(pyver, requires_python):
+                for reqpyt in item['requires_python'].split(","):
+                    requires_python.append(reqpyt.strip())
+        if requires_python:
+            requires_python = list(set(requires_python))
+        if is_version(release) and is_in_specifiers(PY_VER, requires_python):
             versions.append(release)
-    return sorted(versions, key=distutils.version.StrictVersion, reverse=True)
+    return sorted(versions, key=packaging.specifiers.LegacyVersion, reverse=True)
 
-def get_newer_vers(available_version, required_version, installed_version=None):
+def select_news(available_version, installed_version=None):
     """
-    Return list of newer versions which conforms pipdeptree dependencies, otherwise return none.
+    Select versions newer than installed version, if it is known
     """
-    if required_version is None:
-        result = [aver for aver in list(available_version)]
-        return sorted(result, key=distutils.version.StrictVersion, reverse=True)
-    if [rver for rver in required_version if re.search(r'(^==.*|^\d.*)', rver) is not None]:
-        return None
-    result = []
-    av_version = list(available_version)
-    while True:
+    if installed_version is None:
+        return sorted(available_version, key=packaging.specifiers.LegacyVersion, reverse=True)
+    iver = packaging.version.Version(installed_version)
+    return sorted([aver for aver in available_version if packaging.version.Version(aver) > iver],
+                  key=packaging.specifiers.LegacyVersion, reverse=True)
+
+def insert_news(data):
+    """
+    Insert new versions
+    """
+    for pkg, pkg_data in data.iteritems():
+        if 'new_version' in pkg_data.keys():
+            continue
         try:
-            version = av_version.pop(0)
-        except IndexError:
-            break
-        aver = packaging.version.Version(version)
-        rver = packaging.specifiers.SpecifierSet(",".join(required_version))
-        if rver.contains(aver):
-            if installed_version is not None:
-                iver = packaging.version.Version(installed_version)
-                if aver == iver:
-                    break
-                elif aver > iver:
-                    result.append(version)
-            else:
-                result.append(version)
-    if result:
-        return sorted(result, key=distutils.version.StrictVersion, reverse=True)
-    return None
+            new_version = select_news(pkg_data['available_version'], pkg_data['installed_version'])
+        except KeyError:
+            new_version = select_news(pkg_data['available_version'])
+        if new_version:
+            res = {}
+            for version in new_version:
+                content = parse_metadata(get_metadata(pkg, version), pkg_data['extras'])
+                res[version] = content
+            if res:
+                pkg_data['new_version'] = res
+    return data
+
+def new_packages(data):
+    """
+    Return new packages as dictionary
+    """
+    out = {}
+    arr = []
+    pkg_list = data.keys()
+    for pkg, pkg_data in data.iteritems():
+        try:
+            for _ver, ver_data in pkg_data['new_version'].iteritems():
+                for dep in ver_data:
+                    if dep[0] not in pkg_list:
+                        arr.append(dep)
+        except KeyError:
+            pass
+    for item in list(set([i[0] for i in arr])):
+        extras = []
+        for pkg, _req, extra in arr:
+            if pkg == item and extra is not None:
+                extras.append(extra)
+        out[item] = {'extras': extras}
+    return out
+
+def check_new_extras(data):
+    """
+    Check if there are new extras
+    """
+    extra_pkgs = []
+    pkg_list = data.keys()
+    for pkg, pkg_data in data.iteritems():
+        try:
+            for _ver, ver_data in pkg_data['new_version'].iteritems():
+                for dep in ver_data:
+                    if dep[0] in pkg_list and dep[2] is not None:
+                        extra_pkgs.append(dep)
+        except KeyError:
+            pass
+    for pkg, _req, extra in extra_pkgs:
+        if extra not in data[pkg]['extras']:
+            raise Exception('There are new extras!')
+
+def check_extras(data):
+    """
+    Check if there are extras in upgradeable packages
+    """
+    for package in select_upkgs(data, 'upgradeable_version'):
+        if data[package]['extras']:
+            raise Exception('There are extras in upgradeable packages!')
+
+def check_co_branches(data):
+    """
+    Check if there branches with intersection of packages
+    """
+    co_branches = []
+    package_branches = get_branches(data)
+    for branch in package_branches:
+        for pkg, reqs in package_branches.iteritems():
+            if pkg == branch:
+                continue
+            if len(package_branches[branch]+reqs) != len(list(set(package_branches[branch]+reqs))):
+                co_branches.append(branch)
+    co_branches = list(set(co_branches))
+    if co_branches:
+        raise Exception('There are branches with intersection of packages!')
 
 def write_metadata(tmp_file):
     """
@@ -223,7 +474,7 @@ def get_metadata(package, version):
         if item['packagetype'] == 'sdist':
             tmp_file = file_download(item['url'])
             write_metadata(tmp_file)
-            if os.path.isfile('/tmp/requires.txt') and os.path.isfile('/tmp/PKG-INFO'):
+            if os.path.isfile('/tmp/PKG-INFO'):
                 metadata = [
                     line.decode('utf-8') \
                     for line in wheel.metadata.pkginfo_to_metadata('/tmp', '/tmp/PKG-INFO') \
@@ -249,7 +500,7 @@ def get_metadata(package, version):
             break
     return metadata
 
-def parse_metadata(metadata, pyver):
+def parse_metadata(metadata, extra):
     """
     Return dependencies parsed from metadata
     """
@@ -257,157 +508,515 @@ def parse_metadata(metadata, pyver):
         if 'Metadata-Version' in line.decode('utf-8'):
             metadata_version = line.replace('Metadata-Version:', '').strip()
             break
-    if packaging.version.Version(metadata_version) >= packaging.version.Version('2.0'):
-        out = []
-        for dep in [
-                line.replace('Requires-Dist:', '').strip() \
-                for line in metadata if re.search(r'^Requires-Dist:', line)]:
-            if ';' in dep:
-                dep = dep.split(';')
-                if 'python_version' in dep[1]:
-                    if packaging.specifiers.SpecifierSet(
-                            dep[1].replace('python_version', '').replace('"', '').strip()) \
-                        .contains(packaging.version.Version(pyver)):
-                        dep = dep[0]
-                    else:
-                        continue
-                else:
-                    continue
-            dep = dep.split()
-            try:
-                pkg = re.search(r'(.*)(\[.*\])', dep[0]).group(1)
-            except AttributeError:
-                pkg = dep[0]
-            try:
-                pkg = re.search(r'(^[\w\.\-]*)(.*)', dep[0]).group(1)
-                dep.append(re.search(r'(^[\w\.\-]*)(.*)', dep[0]).group(2))
-            except AttributeError:
-                pkg = dep[0]
-            try:
-                ver = dep[1].replace('(', '').replace(')', '').replace(';', '')
-            except IndexError:
-                ver = None
-            out.append((pkg, ver))
+    arr = []
+    if metadata_version and \
+       packaging.version.Version(metadata_version) >= packaging.version.Version('2.0'):
+        arr = []
+        lines = [line.replace('Requires-Dist:', '').strip() \
+                 for line in metadata if re.search(r'^Requires-Dist:', line)]
+        for line in lines:
+            data = pkginfo(str(line), req_extra=extra, repair=True)
+            if data:
+                arr.append(pkginfo(str(line), req_extra=extra, repair=True))
+    return arr
+
+def pvector(package, data):
+    """
+    Return vector of package versions
+    """
+    out = []
+    if 'new_version' not in data[package].keys():
+        out.append((package, data[package]['installed_version']))
+    else:
+        if 'upgradeable_version' in data[package].keys():
+            out.append((package, data[package]['upgradeable_version']))
+        else:
+            if 'installed_version' in data[package].keys():
+                out.append((package, data[package]['installed_version']))
+        for ver in sorted(data[package]['new_version'].keys(),
+                          key=packaging.specifiers.LegacyVersion):
+            if 'upgradeable_version' in data[package].keys():
+                if packaging.specifiers.LegacyVersion(ver) > \
+                   packaging.specifiers.LegacyVersion(data[package]['upgradeable_version']):
+                    out.append((package, ver))
+            else:
+                out.append((package, ver))
     return out
 
-def find_new_dependencies(package, version, package_list, pyver):
+def single_multi(data):
     """
-    Return package dependencies parsed from pypi json
+    Return list of packages with new versions and list of packages without new versions
     """
-    content = parse_metadata(get_metadata(package, version), pyver)
-    for pkg, ver in content:
-        try:
-            if pkg in package_list:
-                yield (pkg, ver)
+    pkg_list, single, multi = [], [], []
+    for pkg, pkg_data in data.iteritems():
+        if 'requires' in pkg_data.keys():
+            pkg_list.append(pkg)
+    for pkg in pkg_list:
+        vec = pvector(pkg, data)
+        if len(vec) == 1:
+            single.append(*vec)
+        elif len(vec) > 1:
+            multi.append(vec)
+    single = list(set([item[0] for item in single]))
+    multi = list(set([item[0] for pkg_data in multi for item in pkg_data]))
+    return single, multi
+
+def move_incompatible(data, to_delete):
+    """
+    Move new version to incompatible
+    """
+    if not to_delete:
+        return data
+    for package, version in to_delete:
+        if 'incompatible_version' not in data[package].keys():
+            data[package]['incompatible_version'] = {}
+        data[package]['incompatible_version'][version] = data[package]['new_version'][version]
+        del data[package]['new_version'][version]
+        if not data[package]['new_version']:
+            del data[package]['new_version']
+    return data
+
+def get_compatible(versions, reqs, inverse=False):
+    """
+    Return compatible versions
+    """
+    specifiers = specifiers_intersection([i for i in itertools.chain(*[req[1] for req in reqs])])
+    if inverse:
+        v_versions = [version for version in versions if not is_in_specifiers(version, specifiers)]
+    else:
+        v_versions = [version for version in versions if is_in_specifiers(version, specifiers)]
+    return sorted(v_versions, key=packaging.specifiers.LegacyVersion, reverse=True)
+
+def del_hards(data):
+    """
+    Return list of packages and their versions that does not satisfy
+    requirements of packages without new version
+    """
+    package_no_news, package_with_news = single_multi(data)
+    deps = []
+    for package in package_no_news:
+        if 'requires' in data[package].keys():
+            if 'upgradeable_version' in data[package].keys():
+                uver = data[package]['upgradeable_version']
+                deps += [dep for dep in data[package]['new_version'][uver] if dep[1] or dep[2]]
             else:
-                try:
-                    for child in find_new_dependencies(
-                            pkg,
-                            get_newer_vers(find_available_vers(pkg, pyver), ver, None)[0],
-                            package_list,
-                            pyver
-                        ):
-                        yield child
-                except TypeError:
-                    pass
-        except AttributeError:
-            pass
+                deps += [dep for dep in data[package]['requires'] if dep[1] or dep[2]]
+    hard_requirements = {}
+    for item in list(set([pkg[0] for pkg in deps])):
+        reqs, extras = [], []
+        for pkg, req, extra in deps:
+            if pkg == item:
+                reqs += req
+                if extra:
+                    extras += extra
+        hard_requirements[item] = {'installed_version': data[item]['installed_version'],
+                                   'requirements': list(set(reqs)),
+                                   'extras': list(set(extras))}
+    to_delete = []
+    for pkg in package_with_news+not_installed(data):
+        for ver, ver_data in data[pkg]['new_version'].iteritems():
+            for dep, req, extra in ver_data:
+                if dep in hard_requirements.keys():
+                    if specifiers_intersection(req+hard_requirements[dep]['requirements']) is None:
+                        to_delete.append((pkg, ver))
+    return to_delete
+
+def del_no_news(data):
+    """
+    Return list of packages and their versions that does not satisfy packages without new version
+    """
+    to_delete = []
+    package_no_news, package_with_news = single_multi(data)
+    for package in package_with_news+not_installed(data):
+        reqs = get_simple_reqs(data, None, package_no_news)
+        versions = [pkg[1] for pkg in pvector(package, data)]
+        incver = get_compatible(versions, reqs, inverse=True)
+        for version in versions:
+            if version in incver:
+                to_delete.append((package, version))
+    return to_delete
+
+def del_one_ver(data):
+    """
+    If all packages requirements lead to one specific version, return list of thath packages
+    """
+    to_delete = []
+    _package_no_news, package_with_news = single_multi(data)
+    for package in package_with_news+not_installed(data):
+        reqs = get_reqs(data, package=package)
+        specifiers = specifiers_intersection(
+            [i for i in itertools.chain(*[req[1] for req in reqs])])
+        if specifiers:
+            if len(specifiers) == 1 and '==' in specifiers[0]:
+                versions = [pkg[1] for pkg in pvector(package, data)]
+                versions.remove(specifiers[0].replace('==', ''))
+                for version in versions:
+                    to_delete.append((package, version))
+    return to_delete
+
+def get_deps(data, package):
+    """
+    Return package deep requirements
+    """
+    try:
+        content = data[package]
+    except KeyError:
+        content = []
+    for pkg in content:
+        yield pkg
+        for child in get_deps(data, pkg):
+            yield child
+
+def not_installed(data):
+    """
+    Return not installed packages
+    """
+    not_i = []
+    for pkg, pkg_data in data.iteritems():
+        if 'requires' not in pkg_data.keys():
+            not_i.append(pkg)
+    return not_i
 
-def depless_vers(res):
+def get_no_news_req(data):
     """
-    If there is no dependencies or versionless dependencies, return the upgradeable version,
-    otherwise return None
+    Return requirements of packages without new versions
+    """
+    reqs = {}
+    package_no_news, _package_with_news = single_multi(data)
+    for package in package_no_news:
+        version = pvector(package, data)[0][1]
+        reqs = save_version(reqs, data, package, version)
+    return reqs
+
+def save_version(r_data, p_data, pkg, ver):
+    """
+    Save the highest package version
+    """
+    if 'installed_version' in p_data[pkg].keys() and p_data[pkg]['installed_version'] == ver:
+        r_data[pkg] = p_data[pkg]['requires']
+    else:
+        r_data[pkg] = p_data[pkg]['new_version'][ver]
+    return r_data
+
+def add_reqs(reqs, data, pkg=None, addpkg=None):
     """
-    depless = []
-    for ver, deps in res.iteritems():
-        if not deps:
-            depless.append(ver)
+    Append requirements
+    """
+    for dep, req, extra in data:
+        if pkg and dep != pkg:
+            continue
+        if addpkg:
+            reqs.append(addpkg)
         else:
-            if not [dep for dep in deps if dep[1] is not None]:
-                depless.append(ver)
-    if depless:
-        depless = sorted(depless, key=distutils.version.StrictVersion, reverse=True)[0]
+            reqs.append((dep, req, extra))
+
+def save_ic(out, package, incompatible=None, compatible=None):
+    """
+    Save compatible/incompatible version
+    """
+    if package not in out.keys():
+        out[package] = {'incompatible': [], 'compatible': None}
+    if incompatible:
+        out[package]['incompatible'].append(incompatible)
+    if compatible:
+        out[package]['compatible'] = compatible
+    return out
+
+def get_reqs(data, package=None, data2=None, addpkg=False):
+    """
+    Get requirements
+    """
+    if package:
+        reqs = []
+        if data2:
+            for pkg in data2:
+                if 'upgradeable_version' in data[pkg].keys():
+                    uver = data[pkg]['upgradeable_version']
+                    add_reqs(reqs, data[pkg]['new_version'][uver], pkg=package)
+                else:
+                    add_reqs(reqs, data[pkg]['requires'], pkg=package)
+        else:
+            for pkg, pkg_data in data.iteritems():
+                uver = None
+                if pkg != package and 'requires' in data[pkg].keys():
+                    if 'upgradeable_version' in data[pkg].keys():
+                        uver = data[pkg]['upgradeable_version']
+                        if addpkg:
+                            add_reqs(reqs, data[pkg]['new_version'][uver], pkg=package, addpkg=pkg)
+                        else:
+                            add_reqs(reqs, data[pkg]['new_version'][uver], pkg=package)
+                    else:
+                        if addpkg:
+                            add_reqs(reqs, data[pkg]['requires'], pkg=package, addpkg=pkg)
+                        else:
+                            add_reqs(reqs, data[pkg]['requires'], pkg=package)
+                    if 'new_version' in data[pkg].keys():
+                        for ver, ver_data in data[pkg]['new_version'].iteritems():
+                            if uver:
+                                if packaging.specifiers.LegacyVersion(ver) <= \
+                                   packaging.specifiers.LegacyVersion(uver):
+                                    continue
+                            if addpkg:
+                                add_reqs(reqs, ver_data, pkg=package, addpkg=pkg)
+                            else:
+                                add_reqs(reqs, ver_data, pkg=package)
+        return reqs
     else:
-        depless = None
-    return depless
-
-def collect_packages(package_list, jsonpipdeptree, pyver=None):
-    """
-    Collect data about packages as dictionary
-    """
-    result = {}
-    for package in package_list:
-        installed_version = "".join(list(set(
-            [_ for _ in json_search(jsonpipdeptree, package, 'installed_version')])))
-        required_version = []
-        for dep in list(set(
-                [_ for _ in json_search(jsonpipdeptree, package, 'required_version')]
-            )):
-            if 'Any' not in dep:
-                required_version.append(dep)
-        try:
-            available_version = find_available_vers(package, pyver)
-        except urllib2.HTTPError:
-            available_version = [installed_version]
-        newer_version = get_newer_vers(available_version, required_version, installed_version)
-        rev = {'installed_version': installed_version,
-               'required_version': required_version,
-               'available_version': available_version}
-        if newer_version is not None:
-            res = {}
-            for version in newer_version:
-                res[version] = [
-                    _ for _ in find_new_dependencies(package, version, package_list, pyver)]
-            rev['newer_version'] = res
+        out = {}
+        for pkg, pkg_data in data.iteritems():
+            reqs = []
+            uver = None
+            if 'upgradeable_version' in pkg_data.keys():
+                uver = pkg_data['upgradeable_version']
+                add_reqs(reqs, pkg_data['new_version'][uver])
+            elif 'requires' in pkg_data.keys():
+                add_reqs(reqs, pkg_data['requires'])
+            if 'new_version' in pkg_data.keys():
+                for ver, ver_data in pkg_data['new_version'].iteritems():
+                    if uver:
+                        if packaging.specifiers.LegacyVersion(ver) <= \
+                           packaging.specifiers.LegacyVersion(uver):
+                            continue
+                    add_reqs(reqs, ver_data)
+            out[pkg] = list(set([req[0] for req in reqs]))
+    return out
 
-            depless = depless_vers(res)
-            if depless:
-                rev['upgradeable_version'] = depless
+def get_simple_reqs(data, package_with_news, package_no_news):
+    """
+    Return no_requires, only_no_news_requires or requirements
+    """
+    if not package_with_news:
+        deps = []
+        for package in package_no_news:
+            if 'requires' in data[package].keys():
+                if 'upgradeable_version' in data[package].keys():
+                    uver = data[package]['upgradeable_version']
+                    deps += [dep for dep in data[package]['new_version'][uver] if dep[1] or dep[2]]
+                else:
+                    deps += [dep for dep in data[package]['requires'] if dep[1] or dep[2]]
+        return deps
+    no_requires, only_no_news_requires, = {}, {}
+    for pkg in package_with_news:
+        dep_in_no_news_vers = []
+        dep_vers = []
+        uver = None
+        if 'upgradeable_version' in data[pkg].keys():
+            uver = data[pkg]['upgradeable_version']
+        if 'new_version' in data[pkg].keys():
+            for ver, ver_data in data[pkg]['new_version'].iteritems():
+                if uver:
+                    if packaging.specifiers.LegacyVersion(ver) <= \
+                       packaging.specifiers.LegacyVersion(uver):
+                        continue
+                if ver_data:
+                    reqs = [dep[0] for dep in ver_data]
+                    reqs_not_in_no_news = [dep for dep in reqs if dep not in package_no_news]
+                    if not reqs_not_in_no_news:
+                        dep_in_no_news_vers.append(ver)
+                else:
+                    dep_vers.append(ver)
+        if dep_vers:
+            no_requires[pkg] = dep_vers
+        if dep_in_no_news_vers:
+            only_no_news_requires[pkg] = dep_in_no_news_vers
+    return no_requires, only_no_news_requires
 
-        result[package] = rev
-    return result
+def phase_one(data):
+    """
+    Partial resolve upgrades
+    """
+    out, no_requires_deps = {}, {}
+    package_no_news, package_with_news = single_multi(data)
+    no_requires, only_no_news_requires = get_simple_reqs(data, package_with_news, package_no_news)
+
+    for package, version in no_requires.iteritems():
+        reqs = get_reqs(data, package=package, addpkg=True)
+        if reqs:
+            no_requires_deps[package] = list(set(reqs))
+        else:
+            out = save_ic(out, package,
+                          compatible=sorted(no_requires[package],
+                                            key=packaging.specifiers.LegacyVersion,
+                                            reverse=True)[0])
+
+    for package, dep in no_requires_deps.iteritems():
+        if all([pkg in package_no_news for pkg in dep]):
+            reqs = get_reqs(data, package=package, data2=dep)
+            compatible = get_compatible(no_requires[package], reqs)
+            for version in no_requires[package]:
+                if version not in compatible:
+                    out = save_ic(out, package, incompatible=version)
+            if compatible:
+                out = save_ic(out, package, compatible=compatible[0])
 
-def check_deps(deps, packages_data):
+    for package, versions in only_no_news_requires.iteritems():
+        reqs = get_reqs(data, package=package, addpkg=True)
+        if all([item in package_no_news for item in list(set(reqs))]):
+            out = save_ic(out, package,
+                          compatible=sorted(versions,
+                                            key=packaging.specifiers.LegacyVersion,
+                                            reverse=True)[0])
+    return out
+
+def get_branches(data):
     """
-    Return true, if all package dependencies conforms
+    Return branches
     """
-    ndeps = []
-    for item in deps:
-        if item[1] is not None:
-            ndeps.append(
-                version_conform_specifiers(
-                    get_highest_version(item[0], packages_data),
-                    packages_data[item[0]]['required_version']+[item[1]]
-                )
-            )
-    return all(ndeps)
+    branches = []
+    package_reqs = {}
+    _package_no_news, package_with_news = single_multi(data)
+    package_with_news = package_with_news+not_installed(data)
+    package_info = get_reqs(data)
+    for package in package_with_news:
+        package_reqs[package] = list(set([i for i in get_deps(package_info, package)]))
+    for package in package_with_news:
+        res = []
+        for pkg, deps in package_reqs.iteritems():
+            if pkg == package:
+                continue
+            if package in deps:
+                res.append(pkg)
+        if not res:
+            branches.append(package)
+    package_info = {}
+    for branch in branches:
+        package_info[branch] = [i for i in package_reqs[branch] if i in package_with_news]
+    return package_info
 
-def select_pkgs(packages_data, rkey):
+def cross_packages(data):
     """
-    Return data packages having requested key
+    Return cross packages
     """
-    result = {}
-    for pkg, pkg_data in packages_data.iteritems():
-        if rkey in pkg_data.keys():
-            result[pkg] = pkg_data
-    return result
+    cross_branches = []
+    out, pkg_reqs = {}, {}
+    package_branches = get_branches(data)
+    _package_no_news, package_with_news = single_multi(data)
+    package_with_news = package_with_news+not_installed(data)
+    for package in package_with_news:
+        res = []
+        for pkg, reqs in package_branches.iteritems():
+            if package in reqs:
+                res.append(pkg)
+        if len(res) > 1:
+            cross_branches.append(package)
+    for package in package_with_news:
+        if package not in cross_branches:
+            version = pvector(package, data)[0][1]
+            pkg_reqs = save_version(pkg_reqs, data, package, version)
+    merged_reqs = merge_two_dicts(pkg_reqs, get_no_news_req(data))
+    for package in cross_branches:
+        reqs = []
+        for pkg, pkg_data in merged_reqs.iteritems():
+            add_reqs(reqs, pkg_data, pkg=package)
+        compatible = get_compatible([pkg[1] for pkg in pvector(package, data)], reqs)
+        if compatible:
+            out = save_ic(out, package, compatible=compatible[0])
+    return out
 
-def print_list(upgradeable_pkgs):
+def ibranch(data, fix=False):
     """
-    Provides list option
+    Return upgradeable versions of independent branch
     """
-    if upgradeable_pkgs:
-        data = []
-        for pkg, pkg_data in sorted(upgradeable_pkgs.iteritems(), key=lambda x: x[0].lower()):
-            data.append([pkg, pkg_data['installed_version'], pkg_data['upgradeable_version']])
-        print tabulate.tabulate(
-            data,
-            ['package', 'installed_version', 'upgradeable_version']
-        )
-        sys.exit(1)
-    else:
-        print "There is nothing to upgrade."
-        sys.exit(0)
+    co_branches = []
+    out, final_result = {}, {}
+    no_news_req = get_no_news_req(data)
+    package_branches = get_branches(data)
+    _package_no_news, package_with_news = single_multi(data)
+    for branch in package_branches:
+        for pkg, reqs in package_branches.iteritems():
+            if pkg == branch:
+                continue
+            if len(package_branches[branch]+reqs) != len(list(set(package_branches[branch]+reqs))):
+                co_branches.append(branch)
+    co_branches = list(set(co_branches))
+    for branch in package_branches:
+        if branch in co_branches:
+            continue
+        if fix:
+            version = pvector(branch, data)[0][1]
+            pkg_reqs = save_version({}, data, branch, version)
+            merged_reqs = merge_two_dicts(pkg_reqs, no_news_req)
+            packages = [pvector(pkg, data)[:2] \
+                        for pkg in package_branches[branch] if pkg in package_with_news]
+        else:
+            merged_reqs = no_news_req.copy()
+            packages = [pvector(branch, data)]+[pvector(pkg, data) \
+                        for pkg in package_branches[branch] if pkg in package_with_news]
+        for comb in list(itertools.product(*packages)):
+            pkg_reqs = {}
+            for package, version in comb:
+                pkg_reqs = save_version(pkg_reqs, data, package, version)
+            merged_reqs = merge_two_dicts(merged_reqs, pkg_reqs)
+            for package, version in comb:
+                reqs = []
+                for pkg, pkg_data in merged_reqs.iteritems():
+                    add_reqs(reqs, pkg_data, pkg=package)
+                specifiers = specifiers_intersection(
+                    [i for i in itertools.chain(*[req[1] for req in reqs])])
+                final_result[comb] = is_in_specifiers(version, specifiers)
+        for comb in final_result:
+            if final_result[comb]:
+                sumary = 0
+                for package, version in comb:
+                    sumary += pvector(package, data).index((package, version))
+                final_result[comb] = sumary
+        high = 0
+        for comb, summary in final_result.iteritems():
+            if summary > high:
+                high = summary
+        if high > 0:
+            res = []
+            for comb, summary in final_result.iteritems():
+                if summary == high:
+                    res.append(comb)
+            for package, version in res[0]:
+                if data[package]['installed_version'] != version:
+                    out = save_ic(out, package, compatible=version)
+    return out
+
+def p_upgrade(data, pkg, compatible=None, incompatible=None):
+    """
+    Partial upgrade
+    """
+    if compatible:
+        data[pkg]['upgradeable_version'] = compatible
+    if incompatible:
+        for version in incompatible:
+            if compatible and version not in compatible:
+                data = move_incompatible(data, [(pkg, version)])
+            elif not compatible:
+                data = move_incompatible(data, [(pkg, version)])
+    return data
+
+def first_loop(data):
+    """
+    Upgrade loop
+    """
+    while True:
+        to_delete_hards = del_hards(data)
+        data = move_incompatible(data, to_delete_hards)
+        to_delete_no_news = del_no_news(data)
+        data = move_incompatible(data, to_delete_no_news)
+        to_delete_one_ver = del_one_ver(data)
+        data = move_incompatible(data, to_delete_one_ver)
+
+        phase_one_packages = phase_one(data)
+        for pkg, pkg_data in phase_one_packages.iteritems():
+            data = p_upgrade(data, pkg, compatible=pkg_data['compatible'],
+                             incompatible=pkg_data['incompatible'])
+
+        cross_pkgs = cross_packages(data)
+        for pkg, pkg_data in cross_pkgs.iteritems():
+            data = p_upgrade(data, pkg, compatible=pkg_data['compatible'],
+                             incompatible=pkg_data['incompatible'])
+
+        i_branch = ibranch(data, fix=True)
+        for pkg, pkg_data in i_branch.iteritems():
+            data = p_upgrade(data, pkg, compatible=pkg_data['compatible'])
+        if all([not to_delete_hards, not to_delete_no_news, not to_delete_one_ver,
+                not phase_one_packages, not cross_pkgs, not i_branch]):
+            break
+    return data
 
 def main():
     """
@@ -415,38 +1024,32 @@ def main():
     """
     os.environ["PYTHONWARNINGS"] = "ignore:DEPRECATION"
     arguments = arg_parse()
-    pyver = get_pyver()
-    pkglist = get_pip_list()
-    jsonpipdeptree = get_jsonpipdeptree()
-    packages_data = collect_packages(pkglist, jsonpipdeptree, pyver=pyver)
-    for pkg, pkg_data in sorted(
-            select_pkgs(packages_data, 'newer_version').iteritems(), key=lambda x: x[0].lower()
-        ):
-        pkg_keys = pkg_data.keys()
-        if 'newer_version' in pkg_keys and 'upgradeable_version' not in pkg_keys:
-            for ver, deps in sorted(
-                    pkg_data['newer_version'].iteritems(),
-                    key=lambda x: distutils.version.StrictVersion(x[0]),
-                    reverse=True
-                ):
-                ndeps = check_deps(deps, packages_data)
-                if ndeps:
-                    packages_data[pkg]['upgradeable_version'] = ver
-                    break
-    upgradeable_pkgs = select_pkgs(packages_data, 'upgradeable_version')
+    packages_data = get_pkg_data()
+    packages_data = first_loop(packages_data)
+
+    i_branch = ibranch(packages_data)
+    for package, data in i_branch.iteritems():
+        if data['compatible']:
+            packages_data[package]['upgradeable_version'] = data['compatible']
+
+    check_co_branches(packages_data)
+    check_extras(packages_data)
 
     if arguments.list:
-        print_list(upgradeable_pkgs)
-    if arguments.show:
-        for pkg in arguments.show:
+        sys.exit(print_list(packages_data))
+    if arguments.show is not None:
+        if arguments.show:
+            pkgs = arguments.show
+        else:
+            pkgs = packages_data
+        for pkg in pkgs:
             pprint.pprint({pkg: packages_data[pkg]})
         sys.exit(0)
     if arguments.upgrade:
-        if 'pip' in upgradeable_pkgs.keys():
-            upgrade_package('pip', upgradeable_pkgs['pip']['upgradeable_version'])
-            del upgradeable_pkgs['pip']
-        for pkg, pkg_data in sorted(upgradeable_pkgs.iteritems(), key=lambda x: x[0].lower()):
-            upgrade_package(pkg, pkg_data['upgradeable_version'])
+        to_upgrade = []
+        for pkg in sorted(select_upkgs(packages_data, 'upgradeable_version')):
+            to_upgrade.append((pkg, packages_data[pkg]['upgradeable_version']))
+        upgrade_package(to_upgrade)
         print "Done."
 
 if __name__ == "__main__":