Filter processed openshift templates by types

os-template-filter-type.py

#!/usr/bin/env python3
# Use python3
# Usage example :
# oc process openshift//cakephp-mysql-persistent -o json \
#    |python ~/os-template-filter-type.py BuildConfig dc
# will get the BuildConfig and the DeploymentConfig (alias dc)
# You can specify a specific name for example is=stream will get only the
# ImageStream named stream
import json
import sys

# There is many more aliases, feel free to add them
aliases = {
    ("bc", "BuildConfig"),
    ("dc", "DeploymentConfig"),
    ("is", "ImageStream"),
    ("svc", "Service"),
    ("sa", "ServiceAccount")
}

wanted = sys.argv[1:]

if not wanted:
    print("Gives the kind of object to get, i.e: bc, ImageStream")
    sys.exit(1)

def getAlias(t):
    for i in aliases:
        if t in i:
            return i[1]

processedJson = json.load(sys.stdin)
if not 'items' in processedJson:
    print("Could not find items in json")
    sys.exit(1)

items = processedJson['items']

newitems = []
for obj in items:
    for w in wanted:
        name = None
        if '=' in w:
            w, name = w.split("=")
        resolved = getAlias(w)
        if resolved and obj.get('kind') == resolved:
            if name and obj.get('metadata') and \
               obj.get('metadata').get('name') \
               and obj['metadata']['name'] != name:
                continue
            newitems.append(obj)

processedJson['items'] = newitems

print(json.dumps(processedJson, indent=4))