[#443] Bugfix: Subcommand aliases were not recognized in some cases.

Closes #443

RELEASE-NOTES.md

@@ -1,5 +1,39 @@
 # picocli Release Notes
 
+# <a name="3.5.2"></a> Picocli 3.5.2
+The picocli community is pleased to announce picocli 3.5.2.
+
+This is a bugfix release that fixes an issue where subcommand aliases were not recognized in some cases.
+
+This is the thirty-eighth public release.
+Picocli follows [semantic versioning](http://semver.org/).
+
+## <a name="3.5.2"></a> Table of Contents
+* [New and noteworthy](#3.5.2-new)
+* [Promoted features](#3.5.2-promoted)
+* [Fixed issues](#3.5.2-fixes)
+* [Deprecations](#3.5.2-deprecated)
+* [Potential breaking changes](#3.5.2-breaking-changes)
+
+## <a name="3.5.2-new"></a> New and Noteworthy
+
+
+## <a name="3.5.2-promoted"></a> Promoted Features
+Promoted features are features that were incubating in previous versions of picocli but are now supported and subject to backwards compatibility. 
+
+No features have been promoted in this picocli release.
+
+## <a name="3.5.2-fixes"></a> Fixed issues
+- [#443] Bugfix: Subcommand aliases were not recognized in some cases. Thanks to [K. Alex Mills](https://github.com/kalexmills) for the bug report.
+
+## <a name="3.5.2-deprecated"></a> Deprecations
+No features were deprecated in this release.
+
+## <a name="3.5.2-breaking-changes"></a> Potential breaking changes
+This release has no breaking changes.
+
+
+
 # <a name="3.5.1"></a> Picocli 3.5.1
 The picocli community is pleased to announce picocli 3.5.1.
 

src/main/java/picocli/CommandLine.java

@@ -241,7 +241,9 @@ public CommandLine addSubcommand(String name, Object command) {
      */
     public CommandLine addSubcommand(String name, Object command, String... aliases) {
         CommandLine subcommandLine = toCommandLine(command, factory);
-        subcommandLine.getCommandSpec().aliases(aliases);
+        List<String> update = new ArrayList<String>(Arrays.asList(subcommandLine.getCommandSpec().aliases()));
+        update.addAll(Arrays.asList(aliases));
+        subcommandLine.getCommandSpec().aliases(update.toArray(new String[0]));
         getCommandSpec().addSubcommand(name, subcommandLine);
         CommandLine.Model.CommandReflection.initParentCommand(subcommandLine.getCommandSpec().userObject(), getCommandSpec().userObject());
         return this;

src/test/java/picocli/CommandLineTest.java

@@ -2256,6 +2256,33 @@ public void testCommandListReturnsAliases() {
         assertSame(subMap.get("sub21"), subMap.get("sub21alias2"));
     }
 
+    @Command(name = "cb")
+    static class Issue443TopLevelCommand implements Runnable  {
+        boolean topWasExecuted;
+        public void run() {
+            topWasExecuted = true;
+        }
+    }
+
+    @Command(name = "task", aliases = {"t"})
+    static class SubCommandWithAlias implements Runnable {
+        boolean subWasExecuted;
+        public void run() {
+            subWasExecuted = true;
+        }
+    }
+
+    @Test
+    public void testIssue443SubcommandWithAliasAnnotation() {
+        Issue443TopLevelCommand top = new Issue443TopLevelCommand();
+        SubCommandWithAlias sub = new SubCommandWithAlias();
+        CommandLine cmd = new CommandLine(top).addSubcommand("task", sub);
+        String[] args = {"t"};
+        List<Object> result = cmd.parseWithHandler(new RunAll(), args);
+        assertTrue("top was executed", top.topWasExecuted);
+        assertTrue("sub was executed", sub.subWasExecuted);
+    }
+
     public static <T> Set<T> setOf(T... elements) {
         Set<T> result = new HashSet<T>();
         for (T t : elements) { result.add(t); }