Add pageship generate dockerfile

cmd/pageship/app/generate.go

@@ -0,0 +1,64 @@
+package app
+
+import (
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	rootCmd.AddCommand(generateCmd)
+	generateCmd.AddCommand(generateDockerfileCmd)
+}
+
+var generateCmd = &cobra.Command{
+	Use:   "generate [command]",
+	Short: "Generate files",
+	Args:  cobra.NoArgs, //if unknown command, will return error just like main pageship command
+	RunE: func(cmd *cobra.Command, args []string) error {
+		cmd.Help() //show help if no subcommand supplied
+		return nil
+	},
+}
+
+var Version = "dev"
+var dockerfileFrom = "FROM ghcr.io/oursky/pageship:v"
+var dockerfileExpose = "EXPOSE 8000"
+var dockerfileCopy = "COPY . /var/pageship"
+var dockerfileInstructions = `
+# INSTRUCTIONS:
+# 1. install docker (if it is not installed yet)
+# 2. open a terminal and navigate to your static page folder
+# 3. run in terminal:
+#      pageship generate dockerfile
+# 4. build the image:
+#      docker build -t IMAGETAG .
+# 5. run the container:
+#      docker run -d --name CONTAINERNAME -p PORT:8000 IMAGETAG
+# 6. visit in browser (URL):
+#      localhost:PORT`
+
+func generateContent() string {
+	dockerfileFromVersion := dockerfileFrom + Version
+	return strings.Join([]string{dockerfileFromVersion, dockerfileExpose, dockerfileCopy, dockerfileInstructions}, "\n")
+}
+
+var generateDockerfileCmd = &cobra.Command{
+	Use:   "dockerfile",
+	Short: "Generate dockerfile",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		f, err := os.Create("dockerfile")
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+
+		Info("generating dockerfile...")
+		_, err = f.Write([]byte(generateContent()))
+		if err != nil {
+			return err
+		}
+		return nil
+	},
+}

cmd/pageship/app/generate_test.go

@@ -0,0 +1,26 @@
+package app
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGenerate(t *testing.T) {
+	Version = "1.2.3"
+	assert.Equal(t, `FROM ghcr.io/oursky/pageship:v1.2.3
+EXPOSE 8000
+COPY . /var/pageship
+
+# INSTRUCTIONS:
+# 1. install docker (if it is not installed yet)
+# 2. open a terminal and navigate to your static page folder
+# 3. run in terminal:
+#      pageship generate dockerfile
+# 4. build the image:
+#      docker build -t IMAGETAG .
+# 5. run the container:
+#      docker run -d --name CONTAINERNAME -p PORT:8000 IMAGETAG
+# 6. visit in browser (URL):
+#      localhost:PORT`, generateContent())
+}

cmd/pageship/main.go

@@ -6,7 +6,10 @@ import (
 	"github.com/oursky/pageship/cmd/pageship/app"
 )
 
+var version = "dev" //https://goreleaser.com/cookbooks/using-main.version/
+
 func main() {
+	app.Version = version
 	if err := app.Execute(); err != nil {
 		app.Error("%s", err)
 		os.Exit(1)

go.mod

@@ -4,10 +4,12 @@ go 1.20
 
 require (
 	github.com/MicahParks/keyfunc/v2 v2.1.0
+	github.com/andybalholm/brotli v1.1.0
 	github.com/caddyserver/certmagic v0.17.2
 	github.com/carlmjohnson/versioninfo v0.22.4
 	github.com/dustin/go-humanize v1.0.1
 	github.com/fatih/color v1.15.0
+	github.com/foxcpp/go-mockdns v1.0.0
 	github.com/fsnotify/fsnotify v1.6.0
 	github.com/go-chi/chi/v5 v5.0.8
 	github.com/go-playground/validator/v10 v10.14.0
@@ -50,7 +52,6 @@ require (
 	github.com/Azure/go-autorest v14.2.0+incompatible // indirect
 	github.com/Azure/go-autorest/autorest/to v0.4.0 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.0.0 // indirect
-	github.com/andybalholm/brotli v1.1.0 // indirect
 	github.com/aws/aws-sdk-go v1.44.314 // indirect
 	github.com/aws/aws-sdk-go-v2 v1.20.0 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.11 // indirect
@@ -73,7 +74,6 @@ require (
 	github.com/aws/smithy-go v1.14.0 // indirect
 	github.com/chzyer/readline v1.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/foxcpp/go-mockdns v1.0.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect

go.sum

@@ -227,7 +227,6 @@ github.com/aws/smithy-go v1.14.0 h1:+X90sB94fizKjDmwb4vyl2cTTPXTE5E2G/1mjByb0io=
 github.com/aws/smithy-go v1.14.0/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
 github.com/benbjohnson/clock v1.0.3/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
-github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v0.0.0-20160804104726-4c0e84591b9a/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=