cli: bugfix — gracefully handling lack of "arguments" key in action object (ref. #66)

cli/lrcli.js

@@ -46,31 +46,35 @@ Options:
 
 let printPluginActionUsage = (action, action_name) => {
     
+    // initialize
     let options = ""
-    for (const opt in action.arguments) {
-        if (opt == '_') {
-            continue
-        }
-        options += `\n        --${opt}`
-        if ("default" in action.arguments[opt]) {
-            options += ` (default: ${action.arguments[opt].default})`
-        }
-        options += `\n            ${action.arguments[opt].description}`
-        options += `\n`
-    }
+    let positional = ""
+    let positional_desc = ""
     
-    let positional = ''
-    let positional_desc = ''
-    if ('_' in action.arguments) {
-        if ('name' in action.arguments._) {
-            positional = ` <${action.arguments._.name}...>`
-        } else {
-            positional = ' <item...>'
+    if ("arguments" in action) {
+        for (const opt in action.arguments) {
+            if (opt == '_') {
+                continue
+            }
+            options += `\n        --${opt}`
+            if ("default" in action.arguments[opt]) {
+                options += ` (default: ${action.arguments[opt].default})`
+            }
+            options += `\n            ${action.arguments[opt].description}`
+            options += `\n`
         }
-        positional_desc = `
+    
+        if ('_' in action.arguments) {
+            if ('name' in action.arguments._) {
+                positional = ` <${action.arguments._.name}...>`
+            } else {
+                positional = ' <item...>'
+            }
+            positional_desc = `
 
-        ${positional}
-            ${action.arguments._.description}`
+            ${positional}
+                ${action.arguments._.description}`
+        }
     }
     
     let usage = `    ${action_name}${ (options != "") ? " [options...]" : "" }${positional}
@@ -215,7 +219,8 @@ if (['--help', '-h'].includes(parsed_args._[2])) {
 var parsed_plugin_args = parsePluginActionArgs(
                             // removing the plugin name and the method name
                             parsed_args._.slice(2),
-                            plugin.actions[action].arguments
+                            // empty object in case arguments key does not exist
+                            plugin.actions[action].arguments || {}
                         )
 
 //console.log(parsed_plugin_args)