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;;; Guile-Git --- GNU Guile bindings of libgit2
;;; Copyright © 2016 Amirouche Boubekki <amirouche@hypermove.net>
;;; Copyright © 2016, 2017 Erik Edrosa <erik.edrosa@gmail.com>
;;;
;;; This file is part of Guile-Git.
;;;
;;; Guile-Git is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; Guile-Git is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Guile-Git. If not, see <http://www.gnu.org/licenses/>.
(define-module (git reference)
#:use-module (rnrs bytevectors)
#:use-module (system foreign)
#:use-module (git bindings)
#:use-module (git types)
#:use-module (git structs)
#:export (reference-name
reference-target
reference-name->oid
reference-shorthand
reference-peel
pointer->reference!
reference-lookup
reference-iterator-new
reference-iterator-glob-new
reference-next
reference-fold
reference-branch?
reference-note?
reference-remote?
reference-tag?
reference-eq?))
;;; FIXME: reference https://libgit2.github.com/libgit2/#HEAD/group/reference
(define reference-name
(let ((proc (libgit2->procedure '* "git_reference_name" '(*))))
(lambda (reference)
(pointer->string (proc (reference->pointer reference))))))
(define reference-target
(let ((proc (libgit2->procedure '* "git_reference_target" '(*))))
(lambda (reference)
(pointer->oid (proc (reference->pointer reference))))))
(define reference-name->oid
(let ((proc (libgit2->procedure* "git_reference_name_to_id" '(* * *))))
(lambda (repository name)
(let ((out (make-oid-pointer)))
(proc out
(repository->pointer repository)
(string->pointer name))
(pointer->oid out)))))
(define reference-shorthand
(let ((proc (libgit2->procedure '* "git_reference_shorthand" '(*))))
(lambda (reference)
(pointer->string (proc (reference->pointer reference))))))
(define reference-peel
(let ((proc (libgit2->procedure* "git_reference_peel" `(* * ,int))))
(lambda (reference obj-type)
(let ((out (make-double-pointer)))
(proc out (reference->pointer reference) obj-type)
(pointer->object! (dereference-pointer out))))))
(define %reference-free (libgit2->pointer "git_reference_free"))
(define (pointer->reference! pointer)
(set-pointer-finalizer! pointer %reference-free)
(pointer->reference pointer))
(define reference-lookup
(let ((proc (libgit2->procedure* "git_reference_lookup" '(* * *))))
(lambda (repository name)
(let ((out (make-double-pointer)))
(proc out (repository->pointer repository) (string->pointer name))
(pointer->reference! (dereference-pointer out))))))
(define %reference-iterator-free
(libgit2->pointer "git_reference_iterator_free"))
(define (pointer->reference-iterator! pointer)
(set-pointer-finalizer! pointer %reference-iterator-free)
(pointer->reference-iterator pointer))
(define reference-iterator-new
(let ((proc (libgit2->procedure* "git_reference_iterator_new" '(* *))))
(lambda (repository)
(let ((out (make-double-pointer)))
(proc out (repository->pointer repository))
(pointer->reference-iterator! (dereference-pointer out))))))
(define reference-iterator-glob-new
(let ((proc (libgit2->procedure* "git_reference_iterator_glob_new" '(* * *))))
(lambda (repository glob)
(let ((out (make-double-pointer)))
(proc out (repository->pointer repository) (string->pointer glob))
(pointer->reference-iterator! (dereference-pointer out))))))
(define reference-next
(let ((proc (libgit2->procedure* "git_reference_next" '(* *))))
(lambda (iterator)
(let ((out (make-double-pointer)))
(proc out (reference-iterator->pointer iterator))
(pointer->reference (dereference-pointer out))))))
(define* (reference-fold proc init repository #:key (glob #f))
(let ((iterator (if glob
(reference-iterator-glob-new repository glob)
(reference-iterator-new repository))))
(let loop ((acc init))
(let ((reference (false-if-exception (reference-next iterator))))
(if reference
(loop (proc reference acc))
acc)))))
(define reference-branch?
(let ((proc (libgit2->procedure int "git_reference_is_branch" '(*))))
(lambda (reference)
(case (proc (reference->pointer reference))
((1) #t)
(else #f)))))
(define reference-note?
(let ((proc (libgit2->procedure int "git_reference_is_note" '(*))))
(lambda (reference)
(case (proc (reference->pointer reference))
((1) #t)
(else #f)))))
(define reference-remote?
(let ((proc (libgit2->procedure int "git_reference_is_remote" '(*))))
(lambda (reference)
(case (proc (reference->pointer reference))
((1) #t)
(else #f)))))
(define reference-tag?
(let ((proc (libgit2->procedure int "git_reference_is_tag" '(*))))
(lambda (reference)
(case (proc (reference->pointer reference))
((1) #t)
(else #f)))))
(define reference-eq?
(let ((proc (libgit2->procedure int "git_reference_cmp" '(* *))))
(lambda (ref1 ref2)
(case (proc (reference->pointer ref1) (reference->pointer ref2))
((0) #t)
(else #f)))))
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