17.3.4 Installing a Language
So far, we have used the reader meta-language to access languages like "literal.rkt" and "dollar-racket.rkt". If you want to use something like #lang literal directly, then you must move "literal.rkt" into a Racket collection named "literal" (see also Adding Collections). Specifically, move "literal.rkt" to a reader submodule of "literal/main.rkt" for any directory name "literal", like so:
#lang racket (module reader racket (require syntax/strip-context) (provide (rename-out [literal-read read] [literal-read-syntax read-syntax])) (define (literal-read in) (syntax->datum (literal-read-syntax #f in))) (define (literal-read-syntax src in) (with-syntax ([str (port->string in)]) (strip-context #'(module anything racket (provide data) (define data 'str))))))
Then, install the "literal" directory as a package:
cd /path/to/literal ; raco pkg install
After moving the file and installing the package, you can use literal directly after #lang:
#lang literal Technology! System! Perfect!
See raco: Racket Command-Line Tools for more information on using raco.
You can also make your language available for others to install by using the Racket package manager (see Package Management in Racket). After you create a "literal" package and register it with the Racket package catalog (see Package Catalogs), others can install it using raco pkg:
raco pkg install literal
Once installed, others can invoke the language the same way: by using #lang literal at the top of a source file.
If you use a public source repository (e.g., GitHub), you can link your package to the source. As you improve the package, others can update their version using raco pkg:
raco pkg update literal
See Package Management in Racket for more information about the Racket package manager.