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Java annotation-based framework for parsing Git like command line structures
Java
Tag: 0.3

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README.md
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README.md

Git-like-cli

Git-like-cli is a Java annotation-based framework for parsing Git like command line structures.

Here is a quick example:

public class Git
{
    public static void main(String[] args)
    {
        CliBuilder<Runnable> builder = buildCli("git", Runnable.class)
                .withDescription("the stupid content tracker")
                .withDefaultCommand(Help.class)
                .withCommands(Help.class,
                        Add.class);

        builder.withGroup("remote")
                .withDescription("Manage set of tracked repositories")
                .withDefaultCommand(RemoteShow.class)
                .withCommands(RemoteShow.class,
                        RemoteAdd.class);

        GitLikeCli<Runnable> gitParser = builder.build();

        gitParser.parse(args).run();
    }

    public static class GitCommand implements Runnable
    {
        @Option(type = GLOBAL, name = "-v", description = "Verbose mode")
        public boolean verbose;

        public void run()
        {
            System.out.println(getClass().getSimpleName());
        }
    }

    @Command(name = "add", description = "Add file contents to the index")
    public static class Add extends GitCommand
    {
        @Arguments(description = "Patterns of files to be added")
        public List<String> patterns;

        @Option(name = "-i", description = "Add modified contents interactively.")
        public boolean interactive;
    }

    @Command(name = "show", description = "Gives some information about the remote <name>")
    public static class RemoteShow extends GitCommand
    {
        @Option(name = "-n", description = "Do not query remote heads")
        public boolean noQuery;

        @Arguments(description = "Remote to show")
        public String remote;
    }

    @Command(name = "add", description = "Adds a remote")
    public static class RemoteAdd extends GitCommand
    {
        @Option(name = "-t", description = "Track only a specific branch")
        public String branch;

        @Arguments(description = "Remote repository to add")
        public List<String> remote;
    }
}

Assuming you have packaged this as an executable program named 'git', you would be able to execute the following commands:

$ git add -p file

$ git remote add origin git@github.com:dain/git-like-cli.git

$ git -v remote show origin

Help System

Git-like-cli contains a fully automated help system, which generates man-page-like documentation driven by the Java annotations.

As you may have noticed in the code above, we added Help.class to the cli. This command is provided by Git-like-cli and works as follows:

$ git help
usage: git [-v] <command> [<args>]

The most commonly used git commands are:
    add       Add file contents to the index
    help      Display help information
    remote    Manage set of tracked repositories

See 'git help <command>' for more information on a specific command.


$ git help git
NAME
        git - the stupid content tracker

SYNOPSIS
        git [-v] <command> [<args>]

OPTIONS
        -v
            Verbose mode

COMMANDS
        help
            Display help information

        add
            Add file contents to the index

        remote show
            Gives some information about the remote <name>

        remote add
            Adds a remote



$ git help add
NAME
        git add - Add file contents to the index

SYNOPSIS
        git [-v] add [-i] [--] [<patterns>...]

OPTIONS
        -i
            Add modified contents interactively.

        -v
            Verbose mode

        --
            This option can be used to separate command-line options from the
            list of argument, (useful when arguments might be mistaken for
            command-line options

        <patterns>
            Patterns of files to be added



$ git help remote
NAME
        git remote - Manage set of tracked repositories

SYNOPSIS
        git [-v] remote
        git [-v] remote add [-t <branch>]
        git [-v] remote show [-n]

OPTIONS
        -v
            Verbose mode

COMMANDS
        With no arguments, Gives some information about the remote <name>

        show
            Gives some information about the remote <name>

            With -n option, Do not query remote heads

        add
            Adds a remote

            With -t option, Track only a specific branch



$ git help remote show
NAME
        git remote show - Gives some information about the remote <name>

SYNOPSIS
        git [-v] remote show [-n] [--] [<remote>]

OPTIONS
        -n
            Do not query remote heads

        -v
            Verbose mode

        --
            This option can be used to separate command-line options from the
            list of argument, (useful when arguments might be mistaken for
            command-line options

        <remote>
            Remote to show

We have also, add Help.class as the default command for git, so if you execute git without any arguments, you will see the following:

$ git help
usage: git [-v] <command> [<args>]

The most commonly used git commands are:
    add       Add file contents to the index
    help      Display help information
    remote    Manage set of tracked repositories

See 'git help <command>' for more information on a specific command.
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