Merge pull request #7 from jimeh/release-please--branches--main

Remove the kingpin external dependency, and instead just use Go's stdlib
flag package.

BREAKING CHANGE: Long versions of command line flags are no longer supported.

.github/workflows/ci.yml

@@ -7,42 +7,63 @@ jobs:
     name: build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.19
       - name: Install dependencies
         run: go mod download
       - name: Build binary
         run: make
       - name: Run and make request
         run: |
-          ./bin/casecmp --port=8080 &
+          ./bin/casecmp -p 8080 &
           curl --silent --retry 10 --retry-delay 1 --retry-connrefused \
               http://localhost:8080/
 
-  release:
-    name: Release
+  helm-lint:
     runs-on: ubuntu-latest
-    needs: [build]
-    if: startsWith(github.ref, 'refs/tags/v')
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+      - uses: azure/setup-helm@v3
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+      - name: Lint chart
+        run: helm lint chart
+      - name: Template chart
+        run: helm template chart
+
+  release-please:
+    runs-on: ubuntu-latest
+    needs: [build, helm-lint]
+    if: github.ref == 'refs/heads/main'
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        id: release-please
+        with:
+          command: manifest
+      - if: ${{ steps.release-please.outputs.release_created }}
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-      - uses: docker/setup-buildx-action@v1
-      - name: Docker Login
-        uses: docker/login-action@v1
+      - if: ${{ steps.release-please.outputs.release_created }}
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - if: ${{ steps.release-please.outputs.release_created }}
+        uses: docker/setup-buildx-action@v2
+      - if: ${{ steps.release-please.outputs.release_created }}
+        name: Docker Login
+        uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      - uses: actions/setup-go@v2
+      - if: ${{ steps.release-please.outputs.release_created }}
+        uses: actions/setup-go@v3
         with:
-          go-version: 1.18
-      - name: Run GoReleaser
+          go-version: 1.19
+      - if: ${{ steps.release-please.outputs.release_created }}
+        name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v2
         with:
           version: latest

.goreleaser.yml

@@ -36,12 +36,9 @@ checksum:
   name_template: "checksums.txt"
 snapshot:
   name_template: "{{ .Tag }}-next"
+
 changelog:
-  sort: asc
-  filters:
-    exclude:
-      - "^docs:"
-      - "^test:"
+  skip: true
 
 dockers:
   - image_templates:

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "2.0.0"
+}

CHANGELOG.md

@@ -1,6 +1,24 @@
 # Changelog
 
-All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+## [2.0.0](https://github.com/jimeh/casecmp/compare/v1.5.0...v2.0.0) (2022-11-14)
+
+
+### ⚠ BREAKING CHANGES
+
+* Long versions of command line flags are no longer supported.
+
+### Features
+
+* **chart:** add kubernetes helm chart ([4e36d51](https://github.com/jimeh/casecmp/commit/4e36d51dc1c081fd50b1397eabb736ad3fe21541))
+* **env:** support BIND environment variable ([623d2c2](https://github.com/jimeh/casecmp/commit/623d2c21b0a25d3b54b6cf3e18fc147a2faa8cd6))
+* remove external dependencies ([9a904fe](https://github.com/jimeh/casecmp/commit/9a904fee99e203d7ddb2a84e2d056d3ed8ec197a))
+
+## [1.5.0](https://github.com/jimeh/casecmp/compare/v1.4.0...v1.5.0) (2022-11-14)
+
+
+### Features
+
+* **deps:** upgrade to Go 1.19 ([75ddcce](https://github.com/jimeh/casecmp/commit/75ddccedf330497c0e04cd4b7f0679e647b8e190))
 
 ## [1.4.0](https://github.com/jimeh/casecmp/compare/v1.3.0...v1.4.0) (2022-05-24)
 

Makefile

@@ -4,11 +4,10 @@ VERSION ?= $(shell cat VERSION)
 SOURCES = $(shell find . -name '*.go' -o -name 'Makefile')
 
 $(BINARY): $(SOURCES)
-	CGO_ENABLED=0 go build -a -o ${BINARY} -ldflags \ "\
+	CGO_ENABLED=0 go build -o ${BINARY} -ldflags \ "\
 		-s -w \
 		-X main.version=${VERSION} \
-		-X main.commit=$(shell git show --format="%h" --no-patch) \
-		-X main.date=$(shell date +%Y-%m-%dT%T%z)"
+		-X main.commit=$(shell git show --format="%h" --no-patch)"
 
 .PHONY: build
 build: $(BINARY)

VERSION

@@ -1 +0,0 @@
-1.2.3

chart/.helmignore

@@ -0,0 +1,23 @@
+# 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
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

chart/Chart.yaml

@@ -0,0 +1,24 @@
+apiVersion: v2
+name: casecmp
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 2.0.0 # x-release-please-version
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: 2.0.0 # x-release-please-version

chart/templates/NOTES.txt

@@ -0,0 +1,22 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "casecmp.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "casecmp.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "casecmp.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "casecmp.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}

chart/templates/_helpers.tpl

@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "casecmp.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 "casecmp.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 "casecmp.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "casecmp.labels" -}}
+helm.sh/chart: {{ include "casecmp.chart" . }}
+{{ include "casecmp.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "casecmp.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "casecmp.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "casecmp.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "casecmp.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

chart/templates/deployment.yaml

@@ -0,0 +1,61 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "casecmp.fullname" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "casecmp.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "casecmp.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "casecmp.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

chart/templates/hpa.yaml

@@ -0,0 +1,28 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "casecmp.fullname" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "casecmp.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}

chart/templates/ingress.yaml

@@ -0,0 +1,61 @@
+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "casecmp.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if and .Values.ingress.className (not (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion)) }}
+  {{- if not (hasKey .Values.ingress.annotations "kubernetes.io/ingress.class") }}
+  {{- $_ := set .Values.ingress.annotations "kubernetes.io/ingress.class" .Values.ingress.className}}
+  {{- end }}
+{{- end }}
+{{- if semverCompare ">=1.19-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1
+{{- else if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if and .Values.ingress.className (semverCompare ">=1.18-0" .Capabilities.KubeVersion.GitVersion) }}
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- end }}
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            {{- if and .pathType (semverCompare ">=1.18-0" $.Capabilities.KubeVersion.GitVersion) }}
+            pathType: {{ .pathType }}
+            {{- end }}
+            backend:
+              {{- if semverCompare ">=1.19-0" $.Capabilities.KubeVersion.GitVersion }}
+              service:
+                name: {{ $fullName }}
+                port:
+                  number: {{ $svcPort }}
+              {{- else }}
+              serviceName: {{ $fullName }}
+              servicePort: {{ $svcPort }}
+              {{- end }}
+          {{- end }}
+    {{- end }}
+{{- end }}

chart/templates/service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "casecmp.fullname" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "casecmp.selectorLabels" . | nindent 4 }}

chart/templates/serviceaccount.yaml

@@ -0,0 +1,12 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "casecmp.serviceAccountName" . }}
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

chart/templates/tests/test-connection.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "casecmp.fullname" . }}-test-connection"
+  labels:
+    {{- include "casecmp.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args: ['{{ include "casecmp.fullname" . }}:{{ .Values.service.port }}']
+  restartPolicy: Never

chart/values.yaml

@@ -0,0 +1,86 @@
+# Default values for casecmp.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+image:
+  repository: ghcr.io/jimeh/casecmp
+  pullPolicy: IfNotPresent
+  # Overrides the image tag whose default is the chart appVersion.
+  tag: ""
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  create: true
+  # Annotations to add to the service account
+  annotations: {}
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: ""
+
+podAnnotations: {}
+
+podSecurityContext:
+  {}
+  # fsGroup: 2000
+
+securityContext:
+  {}
+  # capabilities:
+  #   drop:
+  #   - ALL
+  # readOnlyRootFilesystem: true
+  # runAsNonRoot: true
+  # runAsUser: 1000
+
+service:
+  type: ClusterIP
+  port: 80
+
+ingress:
+  enabled: false
+  className: ""
+  annotations:
+    {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  hosts:
+    - host: chart-example.local
+      paths:
+        - path: /
+          pathType: Prefix
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
+resources:
+  {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+  # requests:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+autoscaling:
+  enabled: false
+  minReplicas: 1
+  maxReplicas: 100
+  targetCPUUtilizationPercentage: 80
+  # targetMemoryUtilizationPercentage: 80
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}

go.mod

@@ -1,11 +1,3 @@
 module github.com/jimeh/casecmp
 
-go 1.18
-
-require gopkg.in/alecthomas/kingpin.v2 v2.2.6
-
-require (
-	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
-	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
-)
+go 1.19

go.sum

@@ -1,18 +0,0 @@
-github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
-github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 h1:s6gZFSlWYmbqAuRjVTiNNhvNRfY2Wxp9nhfyel4rklc=
-github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -2,35 +2,35 @@ package main
 
 import (
 	"bytes"
+	"flag"
 	"fmt"
 	"log"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"time"
-
-	"gopkg.in/alecthomas/kingpin.v2"
 )
 
 var (
+	version = "dev"
+	commit  = "unknown"
+)
+
+const (
 	name        = "casecmp"
-	version     = "dev"
-	commit      = "unknown"
-	date        = "unknown"
-	defaultPort = "8080"
+	defaultPort = 8080
+	defaultBind = "0.0.0.0"
 )
 
 // Argument parsing setup.
 var (
-	portFlag = kingpin.Flag("port", "Port to listen to.").Short('p').
-			Default("").String()
-	bindFlag = kingpin.Flag("bind", "Bind address.").Short('b').
-			Default("0.0.0.0").String()
-	forceHTTPSFlag = kingpin.Flag(
-		"force-https", "Use https:// in example curl commands",
-	).Bool()
-	versionFlag = kingpin.Flag("version", "Print version info.").
-			Short('v').Bool()
+	portFlag       = flag.Int("p", defaultPort, "Port to listen on")
+	bindFlag       = flag.String("b", defaultBind, "Bind address")
+	forceHTTPSFlag = flag.Bool(
+		"f", false, "Use https:// in example curl commands",
+	)
+	versionFlag = flag.Bool("v", false, "Print version info")
 )
 
 func indexHandler(w http.ResponseWriter, r *http.Request) {
@@ -105,13 +105,23 @@ func printVersion() {
 	fmt.Println(buffer.String())
 }
 
-func startServer() {
-	if *portFlag == "" {
+func startServer() error {
+	if *portFlag == defaultPort {
 		envPort := os.Getenv("PORT")
 		if envPort != "" {
-			*portFlag = envPort
-		} else {
-			*portFlag = defaultPort
+			v, err := strconv.Atoi(envPort)
+			if err != nil {
+				return err
+			}
+
+			*portFlag = v
+		}
+	}
+
+	if *bindFlag == defaultBind {
+		envBind := os.Getenv("BIND")
+		if envBind != "" {
+			*bindFlag = envBind
 		}
 	}
 
@@ -119,8 +129,9 @@ func startServer() {
 		*forceHTTPSFlag = true
 	}
 
-	address := *bindFlag + ":" + *portFlag
+	address := fmt.Sprintf("%s:%d", *bindFlag, *portFlag)
 	fmt.Printf("Listening on %s\n", address)
+
 	srv := &http.Server{
 		ReadTimeout:  5 * time.Second,
 		WriteTimeout: 5 * time.Second,
@@ -129,15 +140,19 @@ func startServer() {
 		Addr:         address,
 	}
 
-	log.Fatal(srv.ListenAndServe())
+	return srv.ListenAndServe()
 }
 
 func main() {
-	kingpin.Parse()
+	flag.Parse()
 
 	if *versionFlag {
 		printVersion()
-	} else {
-		startServer()
+		return
+	}
+
+	err := startServer()
+	if err != nil {
+		log.Fatal(err)
 	}
 }

release-please-config.json

@@ -0,0 +1,16 @@
+{
+  "release-type": "go",
+  "bump-minor-pre-major": true,
+  "bump-patch-for-minor-pre-major": true,
+  "packages": {
+    ".": {
+      "changelog-path": "CHANGELOG.md",
+      "draft": false,
+      "prerelease": false,
+      "extra-files": [
+        "chart/Chart.yaml"
+      ]
+    }
+  },
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
+}