Add gohelloworld sample in test folder

will follow up with another pr to update helm test to use this
instead of external repo, but need it to be in git source

test/gohelloworld/Dockerfile

@@ -0,0 +1,11 @@
+FROM golang
+
+# Copy the local package files to the container's workspace.
+ADD . /go/src/github.com/knative/build-pipeline/test/gohelloworld
+
+RUN go install github.com/knative/build-pipeline/test/gohelloworld
+
+ENTRYPOINT /go/bin/gohelloworld
+
+# Document that the service listens on port 8080.
+EXPOSE 8080

test/gohelloworld/gohelloworld-chart/.helmignore

@@ -0,0 +1,21 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

test/gohelloworld/gohelloworld-chart/Chart.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+appVersion: "1.0"
+description: A Helm chart for Kubernetes
+name: gohelloworld-chart
+version: 0.1.0

test/gohelloworld/gohelloworld-chart/templates/_helpers.tpl

@@ -0,0 +1,32 @@
+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "gohelloworld-chart.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 "gohelloworld-chart.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 "gohelloworld-chart.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

test/gohelloworld/gohelloworld-chart/templates/deployment.yaml

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+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: {{ template "gohelloworld-chart.name" . }}
+  labels:
+    app: {{ template "gohelloworld-chart.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "gohelloworld-chart.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - containerPort: {{ .Values.service.internalPort }}
+          livenessProbe:
+            httpGet:
+              path: /
+              port: {{ .Values.service.internalPort }}
+          readinessProbe:
+            httpGet:
+              path: /
+              port: {{ .Values.service.internalPort }}
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- if .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml .Values.nodeSelector | indent 8 }}
+    {{- end }}

test/gohelloworld/gohelloworld-chart/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "gohelloworld-chart.name" . }}
+  labels:
+    app: {{ template "gohelloworld-chart.name" . }}
+    chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.externalPort }}
+      targetPort: {{ .Values.service.internalPort }}
+      name: {{ .Values.service.name }}
+  selector:
+    app: {{ template "gohelloworld-chart.name" . }}
+    release: {{ .Release.Name }}

test/gohelloworld/gohelloworld-chart/values.yaml

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+# Default values for gohelloworld-chart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+image:
+  tag: latest
+  pullPolicy: Always
+
+service:
+  name: gohelloworld
+  type: LoadBalancer
+  externalPort: 8080
+  internalPort: 8080
+
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi

test/gohelloworld/main.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	log.Print("Hello world received a request.")
+	fmt.Fprintf(w, "Hello World! \n")
+}
+
+func main() {
+	log.Print("Hello world sample started.")
+
+	http.HandleFunc("/", handler)
+	http.ListenAndServe(":8080", nil)
+}