Oh is a Unix shell written in Go.  Like the rc shell, oh is similar in spirit
but different in detail from other Unix shells.

Oh extends the shell's programming language features without sacrificing the
shell's interactive features. The following commands behave as expected:

    date
    cat /usr/share/dict/words
    who >user.names
    who >>user.names
    wc <file
    echo [a-f]*.c
    who | wc
    who; date
    cc *.c &
    mkdir junk && cd junk
    cd ..
    rm -r junk || echo "rm failed!"

Oh has objects but no classes. Objects can be created from scratch using the
'object' command. Private members are defined using the 'define' command and
public members are defined using the 'public' command:

    define point: object {
        define x: integer 0
        define y: integer 0

        public move: method a b {
            set $self::x: add $self::x a
            set $self::y: add $self::y b
        }

        public show: method {
            echo $self::x $self::y
        }
    }

Objects can also be created by cloning an existing object:

    define o: point::clone

Modules are objects. The command below creates an object called 'm'. Public,
top-level definitions in 'file' can be accessed using the object 'm'.

    define m: import file

Channels are objects. Oh exposes channels, which are implicit in other shells
in the form of pipes, as first-class values. Channels can be created with the
'channel' command:

    define c: channel

Oh incorporates many features, including first-class functions, from the
Scheme dialect of Lisp. Like Lisp, oh uses the same syntax for code and data.
When data is sent across a channel it is converted to text so that it can be
sent to (or even through) external Unix programs.

To compile and run oh you will need to install (./configure; make install)
the C library libtecla:

    http://www.astro.caltech.edu/~mcs/tecla/libtecla.tar.gz

and then goinstall oh:

    goinstall github.com/michaelmacinnis/oh

Oh is released under an MIT-style license.

Thanks to André Cormier for suggesting the name.