transaction-json.py

from yum.plugins import PluginYumExit, TYPE_CORE, TYPE_INTERACTIVE
try:
    import json
except ImportError:
    import simplejson as json

requires_api_version = '2.5'

plugin_type = (TYPE_INTERACTIVE,)


def config_hook(conduit):
    parser = conduit.getOptParser()
    parser.add_option('', '--json', dest='json', action='store_true',
                      default=False,
                      help="show pending package changes as JSON")


def postresolve_hook(conduit):
    opts, commands = conduit.getCmdLine()

    if opts.json:
        packages = {}

        for transaction in conduit.getTsInfo():
            if transaction.name not in packages:
                packages[transaction.name] = {}

            version = {
                "version": transaction.version,
                "release": transaction.release,
                "epoch": transaction.epoch,
                "arch": transaction.arch,
                "state": transaction.ts_state,
                "repo": getattr(transaction.po, 'repoid')
            }

            if transaction.ts_state:
                packages[transaction.name]["pending"] = version
            else:
                packages[transaction.name]["current"] = version

        print(json.dumps(packages))
        raise PluginYumExit('')