From 0261fef3971aaa6cb5061d6cd600cab6109361ba Mon Sep 17 00:00:00 2001
From: Waqar Ahmed <waqarahmedjoyia@live.com>
Date: Thu, 28 Jan 2021 20:09:20 +0500
Subject: [PATCH] Add common labels/names helper

---
 .../templates/lib/chart/_capabilities.tpl     | 20 ++++++++++++
 .../common/templates/lib/chart/_labels.tpl    | 19 ++++++++++++
 library/common/templates/lib/chart/_names.tpl | 31 +++++++++++++++++++
 3 files changed, 70 insertions(+)
 create mode 100644 library/common/templates/lib/chart/_capabilities.tpl
 create mode 100644 library/common/templates/lib/chart/_labels.tpl
 create mode 100644 library/common/templates/lib/chart/_names.tpl

diff --git a/library/common/templates/lib/chart/_capabilities.tpl b/library/common/templates/lib/chart/_capabilities.tpl
new file mode 100644
index 0000000000..d0d01f6b15
--- /dev/null
+++ b/library/common/templates/lib/chart/_capabilities.tpl
@@ -0,0 +1,20 @@
+{{/*
+Return the appropriate apiVersion for DaemonSet objects.
+*/}}
+{{- define "common.capabilities.daemonset.apiVersion" -}}
+{{- print "apps/v1" -}}
+{{- end -}}
+
+{{/*
+Return the appropriate apiVersion for Deployment objects.
+*/}}
+{{- define "common.capabilities.deployment.apiVersion" -}}
+{{- print "apps/v1" -}}
+{{- end -}}
+
+{{/*
+Return the appropriate apiVersion for StatefulSet objects.
+*/}}
+{{- define "common.capabilities.statefulset.apiVersion" -}}
+{{- print "apps/v1" -}}
+{{- end -}}
diff --git a/library/common/templates/lib/chart/_labels.tpl b/library/common/templates/lib/chart/_labels.tpl
new file mode 100644
index 0000000000..10981d9b5a
--- /dev/null
+++ b/library/common/templates/lib/chart/_labels.tpl
@@ -0,0 +1,19 @@
+{{/*
+Common labels shared across objects.
+*/}}
+{{- define "common.labels" -}}
+helm.sh/chart: {{ include "common.names.chart" . }}
+{{ include "common.labels.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels shared across objects.
+*/}}
+{{- define "common.labels.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "common.names.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
diff --git a/library/common/templates/lib/chart/_names.tpl b/library/common/templates/lib/chart/_names.tpl
new file mode 100644
index 0000000000..d8ea1d0dc9
--- /dev/null
+++ b/library/common/templates/lib/chart/_names.tpl
@@ -0,0 +1,31 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "common.names.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "common.names.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "common.names.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}