hackerbase/src/util-git.scm

100 lines
2.5 KiB
Scheme

;;
;; util-git.scm
;;
;; Support for simple git integration.
;;
;; ISC License
;;
;; Copyright 2023 Brmlab, z.s.
;; Dominik Pantůček <dominik.pantucek@trustica.cz>
;;
;; Permission to use, copy, modify, and/or distribute this software
;; for any purpose with or without fee is hereby granted, provided
;; that the above copyright notice and this permission notice appear
;; in all copies.
;;
;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
;;
(declare (unit util-git))
(module
util-git
(
git
git-status
)
(import scheme
(chicken base)
util-io
util-dict-list)
;; Valid git operating modes
(define git-modes
'((#:exit exit)
(#:output output)
(#:exit+output exit+output)))
;; Used for actual invocation of git binary, returns two values: exit
;; code and output lines
(define (invoke-git repo args)
(apply get-process-exit+output-lines
"git"
"-C"
repo
args))
;; Curried git repo command wrapper
(define (git repo . defargs)
(let ((defmode (if (null? defargs)
'output
;; Raises an error if not valid
(cadr (assq (car defargs) git-modes)))))
(case defmode
((exit)
(lambda args
(let-values (((exit-code _)
(invoke-git repo args)))
exit-code)))
((output)
(lambda args
(let-values (((_ output)
(invoke-git repo args)))
output)))
((exit+output)
(lambda args
(invoke-git repo args))))))
;; Known status types
(define git-status-types
'((" M" 'modified)
("??" 'untracked)))
;; Returns a dictionary of unknown, modified, deleted and added files
(define (git-status repo)
(let* ((lines ((git repo) 'status '--porcelain))
(clean? (null? lines)))
(let loop ((lines lines)
(res (make-ldict `((clean . ,clean?)))))
(if (null? lines)
res
(let* ((line (car lines))
(st (substring line 0 2))
(fname (substring line 4))
(status (or (assoc st git-status-types)
'unknown)))
(loop (cdr lines)
(ldict-set res
status
(cons fname
(ldict-ref res status '())))))))))
)