|import| "" vs :package/module asymmetry on .scm extension support

[philsuero]

There is an asymmetry between the usage of import with "" and :package/module.

In the example, there are two files defining function a. One is the a.ss and the other one is the a.scm.

When importing using (import "a") it imports the file a.ss. If there is no .ss file, it crashes with the error *** ERROR IN ##main -- No such file or directory "/path/to/a.ss".

When importing using (import :a/a) it also imports the file a.ss. But, if there is no .ss file, it imports the a.scm.
(import :a/a) only fails when there is no .ss or .scm files.
That's the asymmetry.

$ cat a.scm
(define (a) (display "scm\n") )
(export a)

$ cat a.ss 
(define (a) (display "ss\n") )
(export a)

$ cat gerbil.pkg 
(package: a)

$ ls
a.scm		a.ss		gerbil.pkg

$ GERBIL_LOADPATH=$(pwd) gxi
Gerbil v0.16-DEV-475-g6d4f5689 on Gambit v4.9.3
> (import "a")
> (a)
ss
>,q

$ GERBIL_LOADPATH=$(pwd) gxi
Gerbil v0.16-DEV-475-g6d4f5689 on Gambit v4.9.3
> (import :a/a)
> (a)
ss
>,q

$ mv a.ss a.xyz
$ GERBIL_LOADPATH=$(pwd) gxi
Gerbil v0.16-DEV-475-g6d4f5689 on Gambit v4.9.3
> (import :a/a)
> (a)
scm
>,q

$ GERBIL_LOADPATH=$(pwd) gxi
Gerbil v0.16-DEV-475-g6d4f5689 on Gambit v4.9.3
> (import "a") 
*** ERROR IN ##main -- No such file or directory "/path/to/a.ss"
> ,q

$ mv a.scm a.sxyz
$ GERBIL_LOADPATH=$(pwd) gxi
Gerbil v0.16-DEV-475-g6d4f5689 on Gambit v4.9.3
> (import :a/a)
*** ERROR IN ##main -- Syntax Error
*** ERROR IN (console)@1.9
--- Syntax Error: Cannot find library module
... form:   :a/a
> ,q