asking for runtime username

install/generator-cyphernode/generators/app/index.js

@@ -9,6 +9,7 @@ const featureChoices = require(path.join(__dirname, "features.json"));
 const coinstring = require('coinstring');
 
 const uaCommentRegexp = /^[a-zA-Z0-9 \.,:_\-\?\/@]+$/; // TODO: look for spec of unsafe chars
+const userRegexp = /^[a-zA-Z0-9\._\-]+$/; 
 
 const reset = '\u001B8\u001B[u';
 const clear = '\u001Bc';
@@ -75,15 +76,15 @@ module.exports = class extends Generator {
     if( fs.existsSync(this.destinationPath('config.json')) ) {
       this.props = require(this.destinationPath('config.json'));
     } else {
-      this.props = {
-        'derivation_path': '0/n',
-        'installer': 'docker',
-        'devmode': false,
-        'devregistry': false
-      };
+      this.props = {};
     }
 
+    this.props.derivation_path = this.props.derivation_path || '0/n';
+    this.props.installer = this.props.installer ||  'docker';
     this.props.devmode = this.props.devmode || false;
+    this.props.devregistry = this.props.devregistry || false;
+    this.props.devmode = this.props.devmode || false;
+    this.props.username = this.props.username || 'cyphernode';
 
     this.featureChoices = featureChoices;
     for( let c of this.featureChoices ) {
@@ -187,6 +188,13 @@ module.exports = class extends Generator {
     return true;
   }
 
+  _usernameValidator( user ) {
+     if( !userRegexp.test( user ) ) {
+      throw new Error('Choose a valid username');
+    }
+    return true;
+  }
+
   _UACommentValidator( comment ) {
     if( !uaCommentRegexp.test( comment ) ) {
       throw new Error('Unsafe characters in UA comment. Please use only a-z, A-Z, 0-9, SPACE and .,:_?@');

install/generator-cyphernode/generators/app/prompters/000_cyphernode.js

@@ -36,6 +36,14 @@ module.exports = {
         value: "mainnet"
       }]
     },
+    {
+      type: 'input',
+      name: 'username',
+      default: utils._getDefault( 'username' ),
+      message: prefix()+'What username will cyphernode run under?'+'\n',
+      filter: utils._trimFilter,
+      validate: utils._usernameValidator
+    },
     {
       type: 'input',
       name: 'xpub',

install/generator-cyphernode/generators/app/templates/installer/config.sh

@@ -8,3 +8,4 @@ BITCOIN_DATAPATH=<%= bitcoin_datapath %>
 LIGHTNING_DATAPATH=<%= lightning_datapath %>
 PROXY_DATAPATH=<%= proxy_datapath %>
 DOCKER_MODE=<%= docker_mode %>
+USERNAME=<%= username %>