How to use JLine in windows?

[Ruaan Viljoen]

Please, any help or redirection would be greatly appreciated. I have been through hours of wiki, stackoverflow and reading but I don't understand how to get JLine working.

 

I downloaded the last jline 1.0 and added the .jar to my eclipse project, but the ConsoleReader.ReadLine is not blocking, it just reads null in an infinite loop.

 

a) I don't have a Maven project and have no idea how to get Maven working.

b) I don't care about cross platform atm, I just want to get simple input and keyboard intercepts working using JLine.

 

 

Thanks in advance

Current code excerpt:

 

ConsoleReader reader = new ConsoleReader();

reader.setBellEnabled(false);

reader.setDebug(new PrintWriter(new FileWriter("writer.debug", true)));

while ((line = reader.readLine("prompt> ")) != null || true) {
          out.println("======>\"" + line + "\"");
          out.flush();
        }

 

 

 

[Andrew McDonald]

I am also having trouble with getting jline to work on Windows.

This is also how jline work for me using eclipse.

So I took jline's Example.java and put it in small gradle project.

Running it in a cmd prompt gives me the following.

>.\build\install\jansiExample\bin\jansiExample.bat color

[ERROR] Terminal initialization failed; falling back to unsupported

java.lang.NoClassDefFoundError: Could not initialize class org.fusesource.jansi.internal.Kernel32

        at org.fusesource.jansi.internal.WindowsSupport.getConsoleMode(WindowsSupport.java:50)

        at jline.WindowsTerminal.getConsoleMode(WindowsTerminal.java:204)

        at jline.WindowsTerminal.init(WindowsTerminal.java:82)

        at jline.TerminalFactory.create(TerminalFactory.java:101)

        at jline.TerminalFactory.get(TerminalFactory.java:158)

        at jline.console.ConsoleReader.<init>(ConsoleReader.java:229)

        at jline.console.ConsoleReader.<init>(ConsoleReader.java:221)

        at jline.console.ConsoleReader.<init>(ConsoleReader.java:209)

        at jline.example.Example.main(Example.java:50)

←[1mfoo←[0m@bar←[32m@baz←[0m> quit

←[33m======>←[0m"quit"

[WARN] Task failed

java.lang.NoClassDefFoundError: Could not initialize class org.fusesource.jansi.internal.Kernel32

        at org.fusesource.jansi.internal.WindowsSupport.setConsoleMode(WindowsSupport.java:60)

        at jline.WindowsTerminal.setConsoleMode(WindowsTerminal.java:208)

        at jline.WindowsTerminal.restore(WindowsTerminal.java:95)

        at jline.TerminalSupport$1.run(TerminalSupport.java:52)

        at jline.internal.ShutdownHooks.runTasks(ShutdownHooks.java:66)

        at jline.internal.ShutdownHooks.access$000(ShutdownHooks.java:22)

        at jline.internal.ShutdownHooks$1.run(ShutdownHooks.java:47)

From the http://jline.sourceforge.net/ page my guess is that I have a strict security manager installed on my company's laptop.  The original problem was with grails, it just stop working and returned a StackOverflow exception.  Using grails -debug and eclipse the jline code

WindowsSupport.getConsoleMode() failed.  So some update was applied by the IT folks that is now causing jline to fail :(

So how do I know if my company's laptop has a strict security manager??

The attached code used gradle 2.2.1, just run 'gradle installApp' to create the batch file shown above.

"

For both Windows and UNIX systems, JLine will fail to initialize if it is run inside a strict security manager that does not allow the loading of libraries, writing to the file system, or executing external programs. However, for most console applications, this is usually not the case."

[Gunnar Mjöberg]

Here are my steps, using Gradle.

build.gradle:

apply plugin: 'java'

apply plugin: 'eclipse'

dependencies {

    compile('jline:jline:2.12.1')

}

repositories {

    mavenCentral()

}

task createSetClasspathScripts << {

    File cmd = project.file("set-classpath.cmd")

    File sh = project.file("set-classpath.sh")

    String cp = sourceSets.main.runtimeClasspath.asPath

    cmd.write "set classpath=\"$cp\"\r\n"

    println "wrote " + cmd.canonicalPath

    sh.write "#!/bin/bash\nexport CLASSPATH=\"$cp\"\n"

    sh.setExecutable(true)

    println "wrote " + sh.canonicalPath

}

The task cSCS creates scripts that set the CLASSPATH for both cmd and Cygwin Bash.

In cmd (the Command Prompt window):

path> gradle assemble cSCS

path> set-classpath.cmd

path> java -cp %classpath% java.jline.Example files

(if you have copied https://github.com/jline/jline2/blob/master/src/test/java/jline/example/Example.java to src/main/java/jline/example and removed its color/ansi section)