ansible module for versioning_copy

versioning_copy.py

#!/usr/bin/python

DOCUMENTATION = '''
---
module: versioning_copy
short_description: Copies the file with datetime versioning name
description:
  - The versioning_copy module copies a file on remote locations. It designed for the tomcat's parallel deploy feature
options:
  war: 
    description:
      - the source path of war
    required: true
  webapps: 
    description:
      - the directory for the webapps of tomcat
    required: true
  context:
    description:
      - the target context name
    required: true
'''

EXAMPLES = '''
# copy the foo.war into the "/var/tomcat/webapps" directory and renaming to bar.war with the datetime version. For example: bar##20160807235959.war
- versioning_copy: war="foo.war" webapps="/var/tomcat/webapps" context="bar"
'''

from ansible.module_utils.basic import *

def main():

    fields = {
        "war" : {"required": True, "type": "str"},
        "webapps" : {"required": True, "type": "str"},
        "context" : {"required": True, "type": "str"}
    }

    module = AnsibleModule(argument_spec=fields)

    import os, os.path
    from datetime import datetime
    war = module.params['war'].strip()
    version = datetime.today().strftime("%Y%m%d%H%M%S")
    webapps = os.path.abspath(module.params['webapps'])
    prefix = "{}##".format(module.params['context'])

    # the context deployed perviously
    def to_version(x):
        try:
            return int(x.split("##")[1].replace(".war", ""))
        except:
            return -1

    olders = [ x for x in os.listdir(webapps) if x.startswith(prefix) and x.endswith(".war") ]
    olders = sorted(olders, key=to_version, reverse=True)
    deploy_path = os.path.join(webapps, "{}{}.war".format(prefix, version))

    import shutil
    shutil.copy2(war, deploy_path)
    if len(olders) > 1:
        removed = []
        for c in olders[1:]:
            p = os.path.join(webapps, c)
            try:
                os.unlink(p)
                removed.append(p)
            except:
                pass

    module.exit_json(changed=False, output={"deploy": deploy_path, "olders": olders, "removed": removed})


if __name__ == '__main__':  
    main()