Add support for multiple non-interactive commmands

Also:
* Rename ThemeResolver bean to avoid clash w/ Spring Boot registered ThemeResolver
* Move shell runner precedence to public static field to allow extension/access

spring-shell-core/src/main/java/org/springframework/shell/ShellRunner.java

@@ -27,7 +27,7 @@ public interface ShellRunner {
 	/**
 	 * Checks if a particular shell runner can execute.
 	 *
-	 * @param args the application argumets
+	 * @param args the application arguments
 	 * @return true if shell runner can execute
 	 */
 	boolean canRun(ApplicationArguments args);

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

@@ -15,9 +15,14 @@
  */
 package org.springframework.shell.jline;
 
-import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import org.jline.reader.ParsedLine;
+import org.jline.reader.Parser;
+import org.jline.reader.impl.DefaultParser;
 
 import org.springframework.boot.ApplicationArguments;
 import org.springframework.core.annotation.Order;
@@ -25,9 +30,9 @@ import org.springframework.shell.Input;
 import org.springframework.shell.InputProvider;
 import org.springframework.shell.Shell;
 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.
@@ -38,66 +43,106 @@ import org.springframework.util.StringUtils;
  * @author Janne Valkealahti
  * @author Chris Bono
  */
-@Order(InteractiveShellRunner.PRECEDENCE - 50)
+@Order(NonInteractiveShellRunner.PRECEDENCE)
 public class NonInteractiveShellRunner implements ShellRunner {
 
+	/**
+	 * The precedence at which this runner is ordered by the DefaultApplicationRunner - which also controls
+	 * the order it is consulted on the ability to handle the current shell.
+	 */
+	public static final int PRECEDENCE = InteractiveShellRunner.PRECEDENCE - 50;
+
 	private final Shell shell;
 
 	private final ShellContext shellContext;
 
-	private Function<ApplicationArguments, List<String>> argsToShellCommand = (args) -> Arrays.asList(args.getSourceArgs());
+	private Parser lineParser;
+
+	private Function<ApplicationArguments, List<String>> commandsFromInputArgs;
 
 	public NonInteractiveShellRunner(Shell shell, ShellContext shellContext) {
 		this.shell = shell;
 		this.shellContext = shellContext;
+		this.lineParser = new DefaultParser();
+		this.commandsFromInputArgs = (args) ->
+				Collections.singletonList(String.join(" ", args.getSourceArgs()));
 	}
 
-	public void setArgsToShellCommand(Function<ApplicationArguments, List<String>> argsToShellCommand) {
-		this.argsToShellCommand = argsToShellCommand;
+	/**
+	 * Sets the function that creates the command() to run from the input application arguments.
+	 *
+	 * @param commandsFromInputArgs function that takes input application arguments and creates zero or more commands
+	 *                                 where each command is a string that specifies the command and options
+	 *                                 (eg. 'history --file myHistory.txt')
+	 */
+	public void setCommandsFromInputArgs(Function<ApplicationArguments, List<String>> commandsFromInputArgs) {
+		this.commandsFromInputArgs = commandsFromInputArgs;
+	}
+
+	/**
+	 * Sets the line parser used to parse commands.
+	 *
+	 * @param lineParser the line parser used to parse commands
+	 */
+	public void setLineParser(Parser lineParser) {
+		this.lineParser = lineParser;
 	}
 
 	@Override
 	public boolean canRun(ApplicationArguments args) {
-		return !argsToShellCommand.apply(args).isEmpty();
+		return !commandsFromInputArgs.apply(args).isEmpty();
 	}
 
 	@Override
 	public void run(ApplicationArguments args) throws Exception {
 		shellContext.setInteractionMode(InteractionMode.NONINTERACTIVE);
-		List<String> commands = this.argsToShellCommand.apply(args);
-		InputProvider inputProvider = new StringInputProvider(commands);
+		List<String> commands = this.commandsFromInputArgs.apply(args);
+		List<ParsedLine> parsedLines = commands.stream()
+				.map(rawCommandLine -> lineParser.parse(rawCommandLine, rawCommandLine.length() + 1))
+				.collect(Collectors.toList());
+		MultiParsedLineInputProvider inputProvider = new MultiParsedLineInputProvider(parsedLines);
 		shell.run(inputProvider);
 	}
 
-	private class StringInputProvider implements InputProvider {
+	/**
+	 * An {@link InputProvider} that returns an input for each entry in a list of {@link ParsedLine parsed lines}.
+	 */
+	static class MultiParsedLineInputProvider implements InputProvider {
 
-		private final List<String> commands;
+		private final List<ParsedLineInput> parsedLineInputs;
+		private int inputIdx;
 
-		private boolean done;
-
-		StringInputProvider(List<String> commands) {
-			this.commands = commands;
+		MultiParsedLineInputProvider(List<ParsedLine> parsedLines) {
+			this.parsedLineInputs = parsedLines.stream()
+					.map(ParsedLineInput::new)
+					.collect(Collectors.toList());
 		}
 
 		@Override
 		public Input readInput() {
-			if (!done) {
-				done = true;
-				return new Input() {
-					@Override
-					public List<String> words() {
-						return commands;
-					}
-
-					@Override
-					public String rawText() {
-						return StringUtils.collectionToDelimitedString(commands, " ");
-					}
-				};
-			}
-			else {
+			if (inputIdx == parsedLineInputs.size()) {
 				return null;
 			}
+			return parsedLineInputs.get(inputIdx++);
+		}
+
+		private static class ParsedLineInput implements Input {
+
+			private final ParsedLine parsedLine;
+
+			ParsedLineInput(ParsedLine parsedLine) {
+				this.parsedLine = parsedLine;
+			}
+
+			@Override
+			public String rawText() {
+				return parsedLine.line();
+			}
+
+			@Override
+			public List<String> words() {
+				return Utils.sanitizeInput(parsedLine.words());
+			}
 		}
 	}
 }

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

@@ -40,10 +40,16 @@ import org.springframework.util.ObjectUtils;
  * @author Eric Bottard
  */
 //tag::documentation[]
-@Order(InteractiveShellRunner.PRECEDENCE - 100)
+@Order(ScriptShellRunner.PRECEDENCE)
 public class ScriptShellRunner implements ShellRunner {
 //end::documentation[]
 
+	/**
+	 * The precedence at which this runner is ordered by the DefaultApplicationRunner - which also controls
+	 * the order it is consulted on the ability to handle the current shell.
+	 */
+	public static final int PRECEDENCE = InteractiveShellRunner.PRECEDENCE - 100;
+
 	private final Parser parser;
 
 	private final Shell shell;