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config functionality extended

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This commit is contained in:
Hans Dijkema
2026-08-13 17:40:48 +02:00
parent 6b027534b9
commit 12788edc7b
3 changed files with 82 additions and 40 deletions
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README.md
+4
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@@ -55,10 +55,14 @@ See the Scribble documentation for command-specific behavior and return values.
`git config` has a small Racket-oriented interface:
```racket
(git 'config '--all)
(git 'config 'get '--all)
(git 'config '--global 'get '--all)
(git 'config 'get '--global "user.email")
(git 'config 'get '--all "credential.helper")
(git 'config 'get "credential.helper")
(git 'config 'set! "user.email" "hans@example.invalid")
(git 'config '--global 'set! "user.email" "hans@example.invalid")
(git 'config 'set! '--global "user.email" "hans@example.invalid")
```
main.rkt
+71 -38
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@@ -143,46 +143,79 @@
; result : Arguments accepted by git config.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (git-config-args args info)
(if (null? args)
(error 'git-config "Expected get or set!")
(let ((action (car args))
(rest (cdr args)))
(cond
((eq? action 'get)
(cond
((null? rest)
(error 'git-config "Expected a configuration key or --all"))
((eq? (car rest) '--all)
(cond
((null? (cdr rest))
(hash-set! info 'config-operation 'all)
'(--list))
((null? (cddr rest))
(hash-set! info 'config-operation 'get-all)
(list '--get-all (cadr rest)))
(else
(error 'git-config "Too many arguments for config get --all"))))
((null? (cdr rest))
(hash-set! info 'config-operation 'get)
(list '--get (car rest)))
(else
(error 'git-config "Too many arguments for config get"))))
(define (scope? x)
(member x '(--global --local --system)))
((eq? action 'set!)
(cond
((= (length rest) 2)
(hash-set! info 'config-operation 'set)
rest)
((and (= (length rest) 3)
(member (car rest) '(--global --local --system)))
(hash-set! info 'config-operation 'set)
rest)
(else
(error 'git-config
"Expected config set! [--global|--local|--system] key value"))))
(define (split-scope args)
(cond
((and (pair? args) (scope? (car args)))
(values (car args) (cdr args)))
(else
(values #f args))))
(let-values (((scope args*) (split-scope args)))
(cond
;; Short form: (git 'config '--all)
((and (not scope)
(= (length args*) 1)
(eq? (car args*) '--all))
(hash-set! info 'config-operation 'all)
'(--list))
((null? args*)
(error 'git-config "Expected get or set!"))
(else
(let ((action (car args*))
(rest (cdr args*)))
(cond
((eq? action 'get)
;; Also accept scope directly after get.
(let-values (((scope* rest*) (split-scope rest)))
(let ((effective-scope (or scope scope*)))
(when (and scope scope*)
(error 'git-config "Configuration scope specified twice"))
(cond
((null? rest*)
(error 'git-config "Expected a configuration key or --all"))
((eq? (car rest*) '--all)
(cond
((null? (cdr rest*))
(hash-set! info 'config-operation 'all)
(append (if effective-scope (list effective-scope) '())
'(--list)))
((null? (cddr rest*))
(hash-set! info 'config-operation 'get-all)
(append (if effective-scope (list effective-scope) '())
(list '--get-all (cadr rest*))))
(else
(error 'git-config "Too many arguments for config get --all"))))
((null? (cdr rest*))
(hash-set! info 'config-operation 'get)
(append (if effective-scope (list effective-scope) '())
(list '--get (car rest*))))
(else
(error 'git-config "Too many arguments for config get"))))))
((eq? action 'set!)
;; Also accept scope directly after set!.
(let-values (((scope* rest*) (split-scope rest)))
(let ((effective-scope (or scope scope*)))
(when (and scope scope*)
(error 'git-config "Configuration scope specified twice"))
(if (= (length rest*) 2)
(begin
(hash-set! info 'config-operation 'set)
(append (if effective-scope (list effective-scope) '())
rest*))
(error 'git-config "Expected config set! [scope] key value")))))
(else
(error 'git-config "Expected get or set!"))))))))
(else
(error 'git-config "Expected get or set!"))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; goal : Process the result of the Racket-oriented git config interface.
scribblings/git.scrbl
+7 -2
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@@ -94,7 +94,10 @@ Provides a Racket-oriented interface to @tt{git config}. The same interface is
available through @racket[git] with command @racket['config].
@racketblock[
(git 'config '--all)
(git 'config 'get '--all)
(git 'config '--global 'get '--all)
(git 'config 'get '--global '--all)
]
returns all visible configuration entries as key/value items:
@@ -122,11 +125,13 @@ Configuration values can be written with @racket['set!]:
@racketblock[
(git 'config 'set! "user.email" "hans@example.invalid")
(git 'config '--global 'set! "user.email" "hans@example.invalid")
(git 'config 'set! '--global "user.email" "hans@example.invalid")
]
The optional write scope can be @tt{--global}, @tt{--local}, or @tt{--system}.
A successful write returns @racket[#t].
The optional scope can be @tt{--global}, @tt{--local}, or @tt{--system}. It may
appear directly after @racket['config] or directly after @racket['get] /
@racket['set!]. A successful write returns @racket[#t].
}
@defproc[(git-branch [argument any/c] ...) boolean?]{