Implemented new Picocli help

Author: pesse

src/main/java/org/utplsql/cli/Cli.java

@@ -14,7 +14,7 @@ public class Cli {
 
     public static void main(String[] args) {
 
-        int exitCode = runWithExitCode(args);
+        int exitCode = runPicocliWithExitCode(args);
 
         System.exit(exitCode);
     }
@@ -67,15 +67,33 @@ static int runPicocliWithExitCode( String[] args ) {
 
             List<CommandLine> parsedLines = commandLine.parse(args);
 
+            boolean commandWasRun = false;
             for ( CommandLine parsedLine : parsedLines ) {
+                if (parsedLine.isUsageHelpRequested()) {
+                    parsedLine.usage(System.out);
+                    return 0;
+                }
+                else if (parsedLine.isVersionHelpRequested()) {
+                    parsedLine.printVersionHelp(System.out);
+                    return 0;
+                }
+
                 Object command = parsedLine.getCommand();
                 if ( command instanceof ICommand ) {
                     exitCode = ((ICommand)command).run();
+                    commandWasRun = true;
                     break;
                 }
             }
-        } catch (ParameterException e) {
-            e.printStackTrace();
+
+            if ( !commandWasRun ) {
+                commandLine.usage(System.out);
+            }
+        } catch (CommandLine.ParameterException e) {
+            System.err.println(e.getMessage());
+            if (!CommandLine.UnmatchedArgumentException.printSuggestions(e, System.err)) {
+                e.getCommandLine().usage(System.err);
+            }
         } catch (Exception e) {
             e.printStackTrace();
         }

src/main/java/org/utplsql/cli/RunPicocliCommand.java

@@ -169,6 +169,9 @@ FileMapperConfig toFileMapperConfig() {
         }
     }
 
+    @Option(names = "-h", usageHelp = true, description = "display this help and exit")
+    boolean help;
+
     private RunAction runAction;
 
     private String[] splitOrEmpty(String value) {

src/main/java/org/utplsql/cli/UtplsqlPicocliCommand.java

@@ -12,4 +12,7 @@
         })
 public class UtplsqlPicocliCommand {
 
+        @CommandLine.Option(names = "-h", usageHelp = true, description = "display this help and exit")
+        boolean help;
+
 }

src/test/java/org/utplsql/cli/HelpCommandTest.java

@@ -31,6 +31,17 @@ void callHelp() {
         assertTrue(output.contains("Usage:"));
     }
 
+    @Test
+    void callRunHelp() {
+
+        capturer.start();
+        int result = TestHelper.runApp("run", "-h");
+        String output = capturer.stop();
+
+        assertEquals(0, result);
+        assertTrue(output.contains("Usage:"));
+    }
+
     @Test
     void callWithNoArgs() {