I would like to have multiple modules in my program. Eg. module foo, and module bar. Module foo would refer to module bar. Then I would like to be able to test those modules in the csi (interpreted) repl. The root of this question is if I can run my code withouth having to compile it. Below is my example.
Note: I'm a scheme newbie, so there may be other issues with this code. Feel free to point anything out, and I will try to correct.
foo.scm
(use r7rs)
(define-library (foo)
(import (scheme base)
(prefix bar bar:))
(export add-some-stuff)
(begin
(define baz 1)
(define (add-some-stuff)
(+ baz bar:bork))
))
bar.scm
(use r7rs)
(define-library (bar)
(import (scheme base))
(export bork)
(begin
(define bork 2)))
Results would hope to be:
$ csi
> ,l foo.scm
> (import (prefix foo foo:))
> (foo:add-some-stuff)
;;=> 3
Here's the error I get:
$ csi -q
#;1> ,l foo.scm
; loading foo.scm ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/r7rs.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/chicken.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/numbers.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/foreign.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/srfi-4.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/scheme.base.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/r7rs-support.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/extras.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/srfi-13.import.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/r7rs-compile-time.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/r7rs-library.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/r7rs-support.so ...
Note: re-importing already imported syntax: syntax-rules
Note: re-importing already imported syntax: cond-expand
Note: re-importing already imported syntax: define-record-type
Note: re-importing already imported syntax: include
Note: re-importing already imported syntax: include
Note: re-importing already imported syntax: import
Note: re-importing already imported syntax: import-for-syntax
Note: re-importing already imported syntax: cond-expand
Note: re-importing already imported syntax: import-for-syntax
Note: re-importing already imported syntax: import
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/r7rs.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/numbers.so ...
; loading /usr/local/Cellar/chicken/4.12.0/lib/chicken/8/scheme.base.so ...
Note: re-importing already imported syntax: syntax-rules
Note: re-importing already imported syntax: import-for-syntax
Note: re-importing already imported syntax: import
Note: re-importing already imported syntax: cond-expand
Note: re-importing already imported syntax: import-for-syntax
Note: re-importing already imported syntax: import
Error: (import) during expansion of (import ...) - cannot import from undefined module: bar
Call history:
numbers.scm:1672: scan-real
<syntax> (define-library (foo) (import (scheme base) (prefix bar bar:)) (export add-some-stuff) (begin (defin...
<syntax> (##core#module foo ((##r7rs#foo)) (##core#define-syntax ##r7rs#foo (##core#lambda _ (quote (##core#u...
<syntax> (##core#define-syntax ##r7rs#foo (##core#lambda _ (quote (##core#undefined))))
<syntax> (##core#lambda _ (quote (##core#undefined)))
<syntax> (##core#begin (##core#quote (##core#undefined)))
<syntax> (##core#quote (##core#undefined))
<syntax> (##core#undefined)
<syntax> (##sys#provide (##core#quote foo))
<syntax> (##core#quote foo)
<syntax> (import-for-syntax (only r7rs begin cond-expand export import import-for-syntax include include-ci s...
<syntax> (##core#undefined)
<syntax> (import (only r7rs begin cond-expand export import import-for-syntax include include-ci syntax-rules...
<syntax> (##core#undefined)
<syntax> (##core#begin (import (scheme base) (prefix bar bar:)) (##core#begin (export add-some-stuff) (##core...
<syntax> (import (scheme base) (prefix bar bar:)) <--
#;1>
Kooda from the #chicken irc channel recommended the system egg, and it seems to be doing what I'm looking for. In short, one needs to create a .system file that specifies the dependency tree, which is described below. It's a little unfortunate that Chicken Scheme can't figure out the internal module dependencies from looking at the import statements in each module, but I think this is the next best thing.
$ chicken-install system
create a file called so-question-chicken-scheme.system. That file should contain:
(define-system so-question-chicken-scheme
(scheme-file "bar")
(scheme-file "foo" depends: '("bar")))
Here's the interpreter results
$ csi -q
#;1> (use system)
#;2> (load "so-question-chicken-scheme.system")
#;3> (load-system so-question-chicken-scheme)
#;4> (import (prefix foo foo:))
#;5> foo:add-some-stuff
#<procedure (add-some-stuff)>
#;6> (foo:add-some-stuff)
3