Generate a Changelog for Nova

Ubuntu uses a tarball to generate packages for Nova and
other openstack projects. This allows the user to find out
what is included in the tarball.

Signed-off-by: Chuck Short <chuck.short@canonical.com>

Change-Id: I0291e19eee1ff2c5fc98b499571b2563841c6076

MANIFEST.in

@@ -4,6 +4,7 @@ include README.rst
 include MANIFEST.in pylintrc Authors
 include openstack-common.conf
 include babel.cfg tox.ini
+include ChangeLog
 graft nova/CA
 graft doc
 graft smoketests

nova/openstack/common/setup.py

@@ -0,0 +1,145 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2011 OpenStack LLC.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+"""
+Utilities with minimum-depends for use in setup.py
+"""
+
+import os
+import re
+import subprocess
+
+
+def parse_mailmap(mailmap='.mailmap'):
+    mapping = {}
+    if os.path.exists(mailmap):
+        fp = open(mailmap, 'r')
+        for l in fp:
+            l = l.strip()
+            if not l.startswith('#') and ' ' in l:
+                canonical_email, alias = l.split(' ')
+                mapping[alias] = canonical_email
+    return mapping
+
+
+def canonicalize_emails(changelog, mapping):
+    """Takes in a string and an email alias mapping and replaces all
+       instances of the aliases in the string with their real email.
+    """
+    for alias, email in mapping.iteritems():
+        changelog = changelog.replace(alias, email)
+    return changelog
+
+
+# Get requirements from the first file that exists
+def get_reqs_from_files(requirements_files):
+    reqs_in = []
+    for requirements_file in requirements_files:
+        if os.path.exists(requirements_file):
+            return open(requirements_file, 'r').read().split('\n')
+    return []
+
+
+def parse_requirements(requirements_files=['requirements.txt',
+                                           'tools/pip-requires']):
+    requirements = []
+    for line in get_reqs_from_files(requirements_files):
+        if re.match(r'\s*-e\s+', line):
+            requirements.append(re.sub(r'\s*-e\s+.*#egg=(.*)$', r'\1',
+                                line))
+        elif re.match(r'\s*-f\s+', line):
+            pass
+        else:
+            requirements.append(line)
+
+    return requirements
+
+
+def parse_dependency_links(requirements_files=['requirements.txt',
+                                               'tools/pip-requires']):
+    dependency_links = []
+    for line in get_reqs_from_files(requirements_files):
+        if re.match(r'(\s*#)|(\s*$)', line):
+            continue
+        if re.match(r'\s*-[ef]\s+', line):
+            dependency_links.append(re.sub(r'\s*-[ef]\s+', '', line))
+    return dependency_links
+
+
+def write_requirements():
+    venv = os.environ.get('VIRTUAL_ENV', None)
+    if venv is not None:
+        with open("requirements.txt", "w") as req_file:
+            output = subprocess.Popen(["pip", "-E", venv, "freeze", "-l"],
+                                      stdout=subprocess.PIPE)
+            requirements = output.communicate()[0].strip()
+            req_file.write(requirements)
+
+
+def _run_shell_command(cmd):
+    output = subprocess.Popen(["/bin/sh", "-c", cmd],
+                              stdout=subprocess.PIPE)
+    return output.communicate()[0].strip()
+
+
+def write_vcsversion(location):
+    """Produce a vcsversion dict that mimics the old one produced by bzr.
+    """
+    if os.path.isdir('.git'):
+        branch_nick_cmd = 'git branch | grep -Ei "\* (.*)" | cut -f2 -d" "'
+        branch_nick = _run_shell_command(branch_nick_cmd)
+        revid_cmd = "git rev-parse HEAD"
+        revid = _run_shell_command(revid_cmd).split()[0]
+        revno_cmd = "git log --oneline | wc -l"
+        revno = _run_shell_command(revno_cmd)
+        with open(location, 'w') as version_file:
+            version_file.write("""
+# This file is automatically generated by setup.py, So don't edit it. :)
+version_info = {
+    'branch_nick': '%s',
+    'revision_id': '%s',
+    'revno': %s
+}
+""" % (branch_nick, revid, revno))
+
+
+def write_git_changelog():
+    """Write a changelog based on the git changelog."""
+    if os.path.isdir('.git'):
+        git_log_cmd = 'git log --stat'
+        changelog = _run_shell_command(git_log_cmd)
+        mailmap = parse_mailmap()
+        with open("ChangeLog", "w") as changelog_file:
+            changelog_file.write(canonicalize_emails(changelog, mailmap))
+
+
+def generate_authors():
+    """Create AUTHORS file using git commits."""
+    jenkins_email = 'jenkins@review.openstack.org'
+    old_authors = 'AUTHORS.in'
+    new_authors = 'AUTHORS'
+    if os.path.isdir('.git'):
+        # don't include jenkins email address in AUTHORS file
+        git_log_cmd = "git log --format='%aN <%aE>' | sort -u | " \
+                      "grep -v " + jenkins_email
+        changelog = _run_shell_command(git_log_cmd)
+        mailmap = parse_mailmap()
+        with open(new_authors, 'w') as new_authors_fh:
+            new_authors_fh.write(canonicalize_emails(changelog, mailmap))
+            if os.path.exists(old_authors):
+                with open(old_authors, "r") as old_authors_fh:
+                    new_authors_fh.write('\n' + old_authors_fh.read())

openstack-common.conf

@@ -1,7 +1,7 @@
 [DEFAULT]
 
 # The list of modules to copy from openstack-common
-modules=cfg,iniparser
+modules=cfg,iniparser,setup
 
 # The base module to hold the copy of openstack.common
 base=nova

setup.py

@@ -15,15 +15,24 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-
 import glob
 import os
 
 import setuptools
+from setuptools.command import sdist
 
+from nova.openstack.common import setup as common_setup
 from nova import version
 
-nova_cmdclass = {}
+
+class local_sdist(sdist.sdist):
+    """Customized sdist hook - builds the ChangeLog file from VC first."""
+    def run(self):
+        common_setup.write_git_changelog()
+        # sdist.sdist is an old style class, can't user super()
+        sdist.sdist.run(self)
+
+nova_cmdclass = {'sdist': local_sdist}
 
 try:
     from sphinx import setup_command