cmd/puppeth: allow specifying a version for geth and faucet

cmd/puppeth/module_faucet.go

@@ -33,7 +33,7 @@ import (
 // faucetDockerfile is the Dockerfile required to build a faucet container to
 // grant crypto tokens based on GitHub authentications.
 var faucetDockerfile = `
-FROM ethereum/client-go:alltools-latest
+FROM ethereum/client-go:alltools-{{.Version}}
 
 ADD genesis.json /genesis.json
 ADD account.json /account.json
@@ -90,6 +90,7 @@ func deployFaucet(client *sshClient, network string, bootnodes []string, config
 
 	dockerfile := new(bytes.Buffer)
 	template.Must(template.New("").Parse(faucetDockerfile)).Execute(dockerfile, map[string]interface{}{
+		"Version":       config.node.version,
 		"NetworkID":     config.node.network,
 		"Bootnodes":     strings.Join(bootnodes, ","),
 		"Ethstats":      config.node.ethstats,

cmd/puppeth/module_node.go

@@ -32,7 +32,7 @@ import (
 
 // nodeDockerfile is the Dockerfile required to run an Ethereum node.
 var nodeDockerfile = `
-FROM ethereum/client-go:latest
+FROM ethereum/client-go:{{.Version}}
 
 ADD genesis.json /genesis.json
 {{if .Unlock}}
@@ -97,6 +97,7 @@ func deployNode(client *sshClient, network string, bootnodes []string, config *n
 	}
 	dockerfile := new(bytes.Buffer)
 	template.Must(template.New("").Parse(nodeDockerfile)).Execute(dockerfile, map[string]interface{}{
+		"Version":   config.version,
 		"NetworkID": config.network,
 		"Port":      config.port,
 		"Peers":     config.peersTotal,
@@ -165,6 +166,7 @@ type nodeInfos struct {
 	gasTarget  float64
 	gasLimit   float64
 	gasPrice   float64
+	version    string
 }
 
 // Report converts the typed struct into a plain string->string map, containing

cmd/puppeth/wizard.go

@@ -25,6 +25,7 @@ import (
 	"net"
 	"os"
 	"path/filepath"
+	"regexp"
 	"sort"
 	"strconv"
 	"strings"
@@ -324,3 +325,31 @@ func (w *wizard) readIPAddress() string {
 		return text
 	}
 }
+
+// readDefaultAddress reads a single line from stdin, trimming if from spaces and
+// converts it to either a version in the form "v1.8.15" or "latest". If an empty
+// line is entered, the default value is returned.
+func (w *wizard) readDefaultVersion(def string) string {
+	for {
+		fmt.Printf("> ")
+		text, err := w.in.ReadString('\n')
+		if err != nil {
+			log.Crit("Failed to read user input", "err", err)
+		}
+		if text = strings.TrimSpace(text); text == "" {
+			return def
+		} else if text == "latest" {
+			return text
+		}
+
+		// Match something like 1.8.15 or 1.8.0
+		regex := regexp.MustCompile("^\\d+\\.\\d+\\.\\d+$")
+		if !regex.Match([]byte(strings.TrimSpace(text))) {
+			log.Error("Invalid input, expected a semantic version in the form 1.8.15")
+			continue
+		}
+
+		// Convert to v1.8.15 (the format used for the ethereum docker images)
+		return "v" + text
+	}
+}

cmd/puppeth/wizard_faucet.go

@@ -38,7 +38,7 @@ func (w *wizard) deployFaucet() {
 	infos, err := checkFaucet(client, w.network)
 	if err != nil {
 		infos = &faucetInfos{
-			node:    &nodeInfos{port: 30303, peersTotal: 25},
+			node:    &nodeInfos{port: 30303, peersTotal: 25, version: "latest"},
 			port:    80,
 			host:    client.server,
 			amount:  1,
@@ -102,6 +102,11 @@ func (w *wizard) deployFaucet() {
 			infos.captchaSecret = w.readPassword()
 		}
 	}
+	// Figure out which version of faucet to use
+	fmt.Println()
+	fmt.Printf("Which version of faucet to use? (default = %s)\n", infos.node.version)
+	infos.node.version = w.readDefaultVersion(infos.node.version)
+
 	// Figure out where the user wants to store the persistent data
 	fmt.Println()
 	if infos.node.datadir == "" {

cmd/puppeth/wizard_node.go

@@ -55,9 +55,15 @@ func (w *wizard) deployNode(boot bool) {
 	}
 	existed := err == nil
 
+	infos.version = "latest"
 	infos.genesis, _ = json.MarshalIndent(w.conf.Genesis, "", "  ")
 	infos.network = w.conf.Genesis.Config.ChainID.Int64()
 
+	// Figure out which version of geth to use
+	fmt.Println()
+	fmt.Printf("Which version of geth to use? (default = %s)\n", infos.version)
+	infos.version = w.readDefaultVersion(infos.version)
+
 	// Figure out where the user wants to store the persistent data
 	fmt.Println()
 	if infos.datadir == "" {