Can't run subshell command within `target_interpreter`

[unennhexium]

I'm trying to paste target_bin in the middle of target_interpreter command using subshell and xargs approaches:

# subshell
sh -c 'mit-scheme --load $0 --eval '((lambda () (main) (exit)))''
# xargs
xargs -i mit-scheme --load {} --eval '((lambda () ((main) (exit)))'

--load should be placed before --eval, since main should be loaded before calling it. The command works fine if I do build step manually.

Can you help me to understand how to do it properly or is it even possible?

I'm very impressed with scriptisto. You have developed a very powerful tool.

P.S. I see chiken and racket templates, which are easily to use, but I can't find sc-macro-transformer procedure in chicken (and its eggs too) which is necessary for me, and racket language itself seems too complex at this moment.

Expected Behavior

target_interpreter command executed with target_bin passed as first argument.

Actual Behavior

Approach	Result
sh	--load: 1: Syntax error: Unterminated quoted string
bash	--load: -c: line 1: unexpected EOF while looking for matching `''
zsh	zsh:1: unmatched '
xargs	freezes waiting for arguments

Steps to Reproduce the Problem

1. Create script "script.scm" file with the following content:

   #! /usr/bin/env scriptisto
   
   ;; scriptisto-begin
   ;; script_src: script.scm
   ;; build_cmd: mit-scheme --eval '(cf "script")'
   ;; target_bin: ./script.com
   ;; # Trying to use subshell:
   ;; target_interpreter: sh -c 'mit-scheme --load $0 --eval '((lambda () (main) (exit)))''
   ;; # Trying to use xargs:
   ;; # target_interpreter: xargs -i mit-scheme --load {} --eval '((lambda () ((main) (exit)))'
   ;; scriptisto-end
   
   (define (main) (write-line "Hello World from MIT/GNU Scheme"))
   

2. chmod +x ./script.scm
3. ./script.scm
4. Try different target_interpreter options (un)commenting lines in build instructions.

Specifications

• Version: 2.2.0 (current last version from Crates.io)
• Platform: Linux amd64 (x86_64-unknown-linux-gnu taget)

[igor-petruk]

Hi,

I tried debugging a bit with

RUST_LOG=debug cargo run -- ./script.scm

It makes debug build and enables logging. The tool ends up running execvp with

Running exec "sh", Args: ["sh", "-c", "'mit-scheme", "--load", "$0", "--eval", "'((lambda", "()", "(main)", "(exit)))''", "/home/user/.cache/scriptisto/bin/home/user/Projects/scriptisto/script.scm/script.com"]

target_interpreter is not very sophisticated, it does split_ascii_whitespace, which just cuts your command in pieces and sends it to execvp. It does not really handle escaping as expected. Maybe it could be fixed

Instead of trying to use something sophisticated in target_interpreter, I would instead just go with a simple shell script. It is a bit longer, but you don't have to struggle with how scriptisto slices the command line.

The idea is along the lines of

#! /usr/bin/env scriptisto

;; scriptisto-begin
;; script_src: script.scm
;; build_cmd: mit-scheme --eval '(cf "script")' && chmod +x ./run.sh
;; target_bin: ./run.sh
;; # Trying to use subshell:
;; files:
;;   - path: ./run.sh
;;     content: |
;;       mit-scheme --load $(dirname $0)/script.com --eval '((lambda () (main) (exit)))'
;; scriptisto-end

(define (main) (write-line "Hello World from MIT/GNU Scheme"))

I hope it helps