release

#!/usr/bin/env python
import os
import shlex
import subprocess
import sys


'''
Given a version number this script will
1. check out a new branch
2. change the version number in cpc/util/version.py
3. commit the change
4. create an archive for release
5. push the tag to refs/tags

if the version number exists in refs/tags the script will not do the
above 5 steps but only create an archive
'''


def executeCommand(command):
    ret =os.system(command)
    if ret:
        print "error while executing the command %s.\n Aborting release"%command
        sys.exit(1)


if(len(sys.argv)<2):
    print "Usage release VERSION_NUM"

versionExists = False
version = sys.argv[1].strip()
releaseArchive = "copernicus-%s.tar.gz"%version
cmd = "git ls-remote --tags"
p = subprocess.Popen(shlex.split(cmd),stdout=subprocess.PIPE,stderr=subprocess.PIPE)

(stdout,stderr) = p.communicate()

if p.returncode:
    print "error while executing the command %s.\n Aborting release"%cmd
    sys.exit(0)

else:
    lines = stdout.splitlines()
    for line in lines:
        if line.endswith(version):
            print """\nVersion %s already exists. Will check out existing tag and create release from there"""%version
            versionExists = True



if versionExists:
    cmd = "git archive --format=tar.gz  %s > %s"%(version,releaseArchive)
    executeCommand(cmd)
else:
    cmd = "git checkout -b release-%s origin/master"%version
    executeCommand(cmd)

    #set version number in file
    versionFile = "cpc/util/version.py"

    #change the version number
    cmd = r"""sed -i '' s/__version.*/__version__=\"%s\"/ %s"""%(version,versionFile)
    executeCommand(cmd)

    #commit
    cmd = r"""git commit -a -m "setting version %s" """%version
    executeCommand(cmd)

    cmd = r"""git tag -a %s -m "version %s" """%(version,version)
    executeCommand(cmd)


    cmd = "git archive --format=tar.gz  %s > %s"%(version,releaseArchive)
    executeCommand(cmd)

    cmd = "git push origin HEAD:refs/tags/%s"%version
    executeCommand(cmd)


print """\nRelease for version %s is now created. You should now upload %s to the copernicus site"""%(version,releaseArchive)