github.com/pensu/helm@v2.6.1+incompatible/pkg/tiller/kind_sorter.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors All rights reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package tiller
    18  
    19  import (
    20  	"sort"
    21  )
    22  
    23  // SortOrder is an ordering of Kinds.
    24  type SortOrder []string
    25  
    26  // InstallOrder is the order in which manifests should be installed (by Kind).
    27  //
    28  // Those occurring earlier in the list get installed before those occurring later in the list.
    29  var InstallOrder SortOrder = []string{
    30  	"Namespace",
    31  	"ResourceQuota",
    32  	"LimitRange",
    33  	"Secret",
    34  	"ConfigMap",
    35  	"PersistentVolume",
    36  	"PersistentVolumeClaim",
    37  	"ServiceAccount",
    38  	"ClusterRole",
    39  	"ClusterRoleBinding",
    40  	"Role",
    41  	"RoleBinding",
    42  	"Service",
    43  	"DaemonSet",
    44  	"Pod",
    45  	"ReplicationController",
    46  	"ReplicaSet",
    47  	"Deployment",
    48  	"StatefulSet",
    49  	"Job",
    50  	"CronJob",
    51  	"Ingress",
    52  	"APIService",
    53  }
    54  
    55  // UninstallOrder is the order in which manifests should be uninstalled (by Kind).
    56  //
    57  // Those occurring earlier in the list get uninstalled before those occurring later in the list.
    58  var UninstallOrder SortOrder = []string{
    59  	"APIService",
    60  	"Ingress",
    61  	"Service",
    62  	"CronJob",
    63  	"Job",
    64  	"StatefulSet",
    65  	"Deployment",
    66  	"ReplicaSet",
    67  	"ReplicationController",
    68  	"Pod",
    69  	"DaemonSet",
    70  	"RoleBinding",
    71  	"Role",
    72  	"ClusterRoleBinding",
    73  	"ClusterRole",
    74  	"ServiceAccount",
    75  	"PersistentVolumeClaim",
    76  	"PersistentVolume",
    77  	"ConfigMap",
    78  	"Secret",
    79  	"LimitRange",
    80  	"ResourceQuota",
    81  	"Namespace",
    82  }
    83  
    84  // sortByKind does an in-place sort of manifests by Kind.
    85  //
    86  // Results are sorted by 'ordering'
    87  func sortByKind(manifests []manifest, ordering SortOrder) []manifest {
    88  	ks := newKindSorter(manifests, ordering)
    89  	sort.Sort(ks)
    90  	return ks.manifests
    91  }
    92  
    93  type kindSorter struct {
    94  	ordering  map[string]int
    95  	manifests []manifest
    96  }
    97  
    98  func newKindSorter(m []manifest, s SortOrder) *kindSorter {
    99  	o := make(map[string]int, len(s))
   100  	for v, k := range s {
   101  		o[k] = v
   102  	}
   103  
   104  	return &kindSorter{
   105  		manifests: m,
   106  		ordering:  o,
   107  	}
   108  }
   109  
   110  func (k *kindSorter) Len() int { return len(k.manifests) }
   111  
   112  func (k *kindSorter) Swap(i, j int) { k.manifests[i], k.manifests[j] = k.manifests[j], k.manifests[i] }
   113  
   114  func (k *kindSorter) Less(i, j int) bool {
   115  	a := k.manifests[i]
   116  	b := k.manifests[j]
   117  	first, aok := k.ordering[a.head.Kind]
   118  	second, bok := k.ordering[b.head.Kind]
   119  	if first == second {
   120  		// same kind (including unknown) so sub sort alphanumeric
   121  		return a.name < b.name
   122  	}
   123  	// unknown kind is last
   124  	if !aok {
   125  		return false
   126  	}
   127  	if !bok {
   128  		return true
   129  	}
   130  	// sort different kinds
   131  	return first < second
   132  }