I'm working on building a standalone executable for a #lang that can be
used in two ways:
1. foo awesome.foo: execute file awesome.foo, which is written in #lang foo
2. foo (no arguments): fire up a REPL. Expressions are to be written in the
foo language.
I can get (1) to work, after wrestling with raco exe (using ++lang) and
raco distribute (using ++collects-copy). An invocation that works for me is:
### begin script snippet
raco exe ++lang foo ++lang racket/base ++lang brag foo.rkt
# copy the source code of foo into collects/foo
mkdir -p collects/foo
find . -mindepth 1 -maxdepth 1 -name '*.rkt' -exec cp {} collects/foo ';'
raco distribute ++collects-copy collects dist foo
### end script snippet
This works for making a standalone executable that can exectute foo
programs specified on the command line, but doesn't work for a REPL. The
difficulty seems to be the `namespace-require` part of `run-repl`, defined
like this:
````
(define (run-repl)
(parameterize ([current-namespace (make-base-empty-namespace)])
(namespace-require 'foo/expander)
(read-eval-print-loop)))
````
When I invoke the executable with no arguments, `run-repl` gets called. But
this leads to:
````
standard-module-name-resolver: collection not found
for module path: racket/base/lang/reader
collection: "racket/base/lang"
````
expander.rkt in foo is written in racket/base, so I suppose that's what
triggers the issue.
My question, crudely put, is: How do I "embed" racket/base so that I can
use `namespace-require` as seen in `run-repl`? (I assume namespace-require
is what I need; if that's wrong, please do correct me.) It appears that
++lang racket/base bit in raco exe isn't enough. A related question about
raco exe is: if racket/base isn't available, what *is* available?
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