Re-quote whitespace

- NonInteractiveShellRunner has a trouble where incoming
  argument loses info about "quoted" string which is handled
  by OS terminal.
- Add re-quoting in presense of a whitespace so that
  jline parser can detect it correctly.
- Fixes #567

spring-shell-core/src/main/java/org/springframework/shell/jline/NonInteractiveShellRunner.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.shell.jline;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.function.Function;
@@ -33,6 +34,7 @@ import org.springframework.shell.ShellRunner;
 import org.springframework.shell.Utils;
 import org.springframework.shell.context.InteractionMode;
 import org.springframework.shell.context.ShellContext;
+import org.springframework.util.StringUtils;
 
 /**
  * A {@link ShellRunner} that executes commands without entering interactive shell mode.
@@ -58,9 +60,32 @@ public class NonInteractiveShellRunner implements ShellRunner {
 
 	private Parser lineParser;
 
-	private Function<ApplicationArguments, List<String>> commandsFromInputArgs = args -> args
-			.getSourceArgs().length == 0 ? Collections.emptyList()
-					: Collections.singletonList(String.join(" ", args.getSourceArgs()));
+    private static final String SINGLE_QUOTE = "\'";
+    private static final String DOUBLE_QUOTE = "\"";
+
+	private Function<ApplicationArguments, List<String>> commandsFromInputArgs = args -> {
+		if (args.getSourceArgs().length == 0) {
+			return Collections.emptyList();
+		}
+		// re-quote if needed having whitespace
+		String raw = Arrays.stream(args.getSourceArgs())
+			.map(a -> {
+				if (!isQuoted(a) && StringUtils.containsWhitespace(a)) {
+					return "\"" + a + "\"";
+				}
+				return a;
+			})
+			.collect(Collectors.joining(" "));
+		return Collections.singletonList(raw);
+	};
+
+	private static boolean isQuoted(String str) {
+		if (str == null) {
+			return false;
+		}
+		return str.startsWith(SINGLE_QUOTE) && str.endsWith(SINGLE_QUOTE)
+				|| str.startsWith(DOUBLE_QUOTE) && str.endsWith(DOUBLE_QUOTE);
+	}
 
 	public NonInteractiveShellRunner(Shell shell, ShellContext shellContext) {
 		this.shell = shell;

spring-shell-core/src/test/java/org/springframework/shell/jline/NonInteractiveShellRunnerTests.java

@@ -16,13 +16,27 @@
 package org.springframework.shell.jline;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InjectMocks;
+import org.mockito.Mockito;
+import org.mockito.Spy;
+import org.mockito.junit.jupiter.MockitoExtension;
 
 import org.springframework.boot.DefaultApplicationArguments;
+import org.springframework.shell.InputProvider;
+import org.springframework.shell.Shell;
+import org.springframework.shell.context.DefaultShellContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+@ExtendWith(MockitoExtension.class)
 public class NonInteractiveShellRunnerTests {
 
+	@Spy
+	@InjectMocks
+	private Shell shell;
+
 	@Test
 	public void testEmptyArgsDontRun() {
 		NonInteractiveShellRunner runner = new NonInteractiveShellRunner(null, null);
@@ -36,4 +50,37 @@ public class NonInteractiveShellRunnerTests {
 		DefaultApplicationArguments args = new DefaultApplicationArguments("hi");
 		assertThat(runner.canRun(args)).isTrue();
 	}
+
+	@Test
+	public void shouldQuoteWithWhitespace() throws Exception {
+		NonInteractiveShellRunner runner = new NonInteractiveShellRunner(shell, new DefaultShellContext());
+		DefaultApplicationArguments args = new DefaultApplicationArguments("foo bar");
+		ArgumentCaptor<InputProvider> valueCapture = ArgumentCaptor.forClass(InputProvider.class);
+		Mockito.doNothing().when(shell).run(valueCapture.capture());
+		runner.run(args);
+		InputProvider value = valueCapture.getValue();
+		assertThat(value.readInput().rawText()).isEqualTo("\"foo bar\"");
+	}
+
+	@Test
+	public void shouldNotQuoteIfQuoted() throws Exception {
+		NonInteractiveShellRunner runner = new NonInteractiveShellRunner(shell, new DefaultShellContext());
+		DefaultApplicationArguments args = new DefaultApplicationArguments("'foo bar'");
+		ArgumentCaptor<InputProvider> valueCapture = ArgumentCaptor.forClass(InputProvider.class);
+		Mockito.doNothing().when(shell).run(valueCapture.capture());
+		runner.run(args);
+		InputProvider value = valueCapture.getValue();
+		assertThat(value.readInput().rawText()).isEqualTo("'foo bar'");
+	}
+
+	@Test
+	public void shouldNotQuoteWithoutWhitespace() throws Exception {
+		NonInteractiveShellRunner runner = new NonInteractiveShellRunner(shell, new DefaultShellContext());
+		DefaultApplicationArguments args = new DefaultApplicationArguments("foobar");
+		ArgumentCaptor<InputProvider> valueCapture = ArgumentCaptor.forClass(InputProvider.class);
+		Mockito.doNothing().when(shell).run(valueCapture.capture());
+		runner.run(args);
+		InputProvider value = valueCapture.getValue();
+		assertThat(value.readInput().rawText()).isEqualTo("foobar");
+	}
 }