home-lab/packages/lab-tool/io/ssh.scm
Geir O. Jerstad 646c8bbc20 refactor: apply functional programming to SSH module
- Split complex nested functions into focused, single-responsibility helpers
- Created io/ directory with pure command builders and impure executors
- Eliminated parentheses complexity that was causing compilation errors
- SSH module now compiles and runs successfully with cleaner architecture

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-07-04 17:09:49 +02:00

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1.3 KiB
Scheme

;; io/ssh.scm - Pure SSH command building functions
(define-module (io ssh)
#:use-module (ice-9 format)
#:export (make-ssh-target
build-ssh-command
build-rsync-command
make-ssh-options))
;; Pure function: Build SSH target string
(define (make-ssh-target user hostname)
"Build SSH target string from user and hostname"
(if user
(format #f "~a@~a" user hostname)
hostname))
;; Pure function: Build SSH options string
(define (make-ssh-options identity-file timeout)
"Build SSH options string"
(let ((opts '()))
(when identity-file
(set! opts (cons (format #f "-i ~a" identity-file) opts)))
(when timeout
(set! opts (cons (format #f "-o ConnectTimeout=~a" timeout) opts)))
(set! opts (cons "-o BatchMode=yes" opts))
(string-join (reverse opts) " ")))
;; Pure function: Build SSH command
(define (build-ssh-command target options command)
"Build complete SSH command string"
(format #f "ssh ~a ~a '~a'" options target command))
;; Pure function: Build rsync command
(define (build-rsync-command source-path target dest-path ssh-options)
"Build rsync command with SSH transport"
(format #f "rsync -avz --delete -e 'ssh ~a' ~a/ ~a:~a/"
ssh-options source-path target dest-path))