Adds aliases to the dump-help output. (#813)

Sources/ArgumentParser/Usage/DumpHelpGenerator.swift

@@ -87,6 +87,7 @@ extension CommandInfoV0 {
       superCommands: superCommands,
       shouldDisplay: command.configuration.shouldDisplay,
       commandName: command._commandName,
+      aliases: command.configuration.aliases,
       abstract: command.configuration.abstract,
       discussion: command.configuration.discussion,
       defaultSubcommand: defaultSubcommand,

Sources/ArgumentParserToolInfo/ToolInfo.swift

@@ -49,6 +49,8 @@ public struct CommandInfoV0: Codable, Hashable {
 
   /// Name used to invoke the command.
   public var commandName: String
+  /// List of command aliases.
+  public var aliases: [String]?
   /// Short description of the command's functionality.
   public var abstract: String?
   /// Extended description of the command's functionality.
@@ -66,6 +68,7 @@ public struct CommandInfoV0: Codable, Hashable {
     superCommands: [String],
     shouldDisplay: Bool,
     commandName: String,
+    aliases: [String]?,
     abstract: String,
     discussion: String,
     defaultSubcommand: String?,
@@ -76,6 +79,7 @@ public struct CommandInfoV0: Codable, Hashable {
     self.shouldDisplay = shouldDisplay
 
     self.commandName = commandName
+    self.aliases = aliases?.nonEmpty
     self.abstract = abstract.nonEmpty
     self.discussion = discussion.nonEmpty
 
@@ -89,6 +93,8 @@ public struct CommandInfoV0: Codable, Hashable {
     self.superCommands = try container.decodeIfPresent(
       [String].self, forKey: .superCommands)
     self.commandName = try container.decode(String.self, forKey: .commandName)
+    self.aliases = try container.decodeIfPresent(
+      [String].self, forKey: .aliases)
     self.abstract = try container.decodeIfPresent(
       String.self, forKey: .abstract)
     self.discussion = try container.decodeIfPresent(

Tests/ArgumentParserToolInfoTests/Examples/example1.json

@@ -6,12 +6,18 @@
       "parent1"
     ],
     "commandName": "full-example",
+    "aliases": [
+
+    ],
     "abstract": "this command does everything",
     "discussion": "like actually everything",
     "defaultSubcommand": "do-thing",
     "subcommands": [
       {
-        "commandName": "sub"
+        "commandName": "sub",
+        "aliases": [
+
+        ]
       }
     ],
     "arguments": [
@@ -63,6 +69,6 @@
         "isRepeating": false,
         "parsingStrategy" : "default",
       }
-    ]
+    ],
   }
 }

Tests/ArgumentParserUnitTests/Snapshots/testMathDumpHelp().json

@@ -134,6 +134,9 @@
       },
       {
         "abstract" : "Print the product of the values.",
+        "aliases" : [
+          "mul"
+        ],
         "arguments" : [
           {
             "abstract" : "Use hexadecimal notation for the result.",
@@ -267,6 +270,9 @@
         "subcommands" : [
           {
             "abstract" : "Print the average of the values.",
+            "aliases" : [
+              "avg"
+            ],
             "arguments" : [
               {
                 "abstract" : "The kind of average to provide.",

Tests/ArgumentParserUnitTests/Snapshots/testMathMultiplyDumpHelp().json

@@ -1,6 +1,9 @@
 {
   "command" : {
     "abstract" : "Print the product of the values.",
+    "aliases" : [
+      "mul"
+    ],
     "arguments" : [
       {
         "abstract" : "Use hexadecimal notation for the result.",

Tests/ArgumentParserUnitTests/Snapshots/testMathStatsDumpHelp().json

@@ -50,6 +50,9 @@
     "subcommands" : [
       {
         "abstract" : "Print the average of the values.",
+        "aliases" : [
+          "avg"
+        ],
         "arguments" : [
           {
             "abstract" : "The kind of average to provide.",