bach - Java Shell Builder

Use Java source in jshell to build your modular project.

No need to be a maven to be able to use a build tool - forax/pro

simple usage

Download a copy of Bach.java to your project's root directory and put the following jshell script in file called build.jsh. Launch the build with jshell build.jsh.

/open Bach.java

new Bach().run("java", "--version")

/exit

make it executable

Want to call just ./build to launch the build?

Add the following pseudo-shebang as the first line to build.jsh:

//usr/bin/env jshell --show-version --execution local "$0" "$@"; exit $?

Don't forget to mark your build script executable, i.e. chmod u+x build.jsh. See bootstrap on-the-fly section below for an example.

bootstrap on-the-fly

Copy and paste the source of bootstrap.jsh to automatically download that latest revisions of Bach.java and Bach.jsh.

//usr/bin/env jshell --show-version --execution local "$0" "$@"; exit $?

/*
 * Download "Bach.java" and "Bach.jsh" from github to local "target" directory.
 */
var target = Files.createDirectories(Paths.get("target"))
var remote = new URL("https://github.com/sormuras/bach/raw/master/src/bach/")
for (var name : Set.of("Bach.java", "Bach.jsh")) {
  var script = target.resolve(name);
  // if (Files.exists(script)) continue; // uncomment to preserve existing files
  try (var stream = new URL(remote, name).openStream()) {
    Files.copy(stream, script, StandardCopyOption.REPLACE_EXISTING);
  }
}

/*
 * Source "Bach.java" and "Bach.jsh" into this jshell session.
 */
/open target/Bach.java
/open target/Bach.jsh

/*
 * Use it!
 */
java("--version")

/exit

When /open URI is implemented in jshell 11 or later the bootstrap commands for loading Bach.java boil down to:

/open https://raw.githubusercontent.com/sormuras/bach/master/src/bach//Bach.java.

be free - have fun