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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 tree)
#:use-module (system foreign)
#:use-module (git bindings)
#:use-module (git types)
#:use-module (git structs)
#:re-export (tree?
tree-entry?)
#:export (TREEWALK-PRE
TREEWALK-POST
pointer->tree!
tree-dup
tree-fold
tree-entry-byid
tree-entry-byindex
tree-entry-byname
tree-entry-bypath
tree-entry-name
tree-entry-type
tree-entry-id
tree-entry->object
tree-id
tree-list
tree-lookup
tree-walk))
(define TREEWALK-PRE 0)
(define TREEWALK-POST 1)
;; FIXME: https://libgit2.github.com/libgit2/#HEAD/group/tree/git_tree_create_updated
;; XXX: only found in HEAD
;;
;; (define tree-dup
;; (let ((proc (libgit2->procedure* "git_tree_dup" '(* *))))
;; (lambda (source)
;; (let ((out (make-double-pointer)))
;; (proc out
;; (tree->pointer source))
;; (pointer->tree (dereference-pointer out))))))
(define tree-entry-byid
(let ((proc (libgit2->procedure '* "git_tree_entry_byid" '(* *))))
(lambda (tree id)
(let ((ret (proc (tree->pointer tree) (oid->pointer id))))
(if (null-pointer? ret)
#f
(pointer->tree-entry ret))))))
(define tree-entry-byindex
(let ((proc (libgit2->procedure '* "git_tree_entry_byindex" `(* ,size_t))))
(lambda (tree idx)
(let ((ret (proc (tree->pointer tree) idx)))
(if (null-pointer? ret)
#f
(pointer->tree-entry ret))))))
(define tree-entry-byname
(let ((proc (libgit2->procedure '* "git_tree_entry_byname" '(* *))))
(lambda (tree filename)
(let ((ret (proc (tree->pointer tree) (string->pointer filename))))
(if (null-pointer? ret)
#f
(pointer->tree-entry ret))))))
(define tree-entry-bypath
(let ((proc (libgit2->procedure* "git_tree_entry_bypath" '(* * *))))
(lambda (tree path)
(let ((out (make-double-pointer)))
(proc out (tree->pointer tree) (string->pointer path))
(pointer->tree-entry! (dereference-pointer out))))))
(define tree-entry-cmp
(let ((proc (libgit2->procedure int "git_tree_entry_cmp" '(* *))))
(lambda (e1 e2)
(proc (tree-entry->pointer e1) (tree-entry->pointer e2)))))
(define tree-entry-dup
(let ((proc (libgit2->procedure* "git_tree_entry_dup" '(* *))))
(lambda (source)
(let ((dest (make-double-pointer)))
(proc dest (tree-entry->pointer source))
(pointer->tree-entry! (dereference-pointer dest))))))
;; FIXME: https://libgit2.github.com/libgit2/#HEAD/group/tree/git_tree_entry_filemode
;; FIXME: https://libgit2.github.com/libgit2/#HEAD/group/tree/git_tree_entry_filemode_raw
(define %tree-entry-free (libgit2->pointer "git_tree_entry_free"))
(define (pointer->tree-entry! pointer)
(set-pointer-finalizer! pointer %tree-entry-free)
(pointer->tree-entry pointer))
(define tree-entry-id
(let ((proc (libgit2->procedure '* "git_tree_entry_id" '(*))))
(lambda (entry)
(let ((ret (proc (tree-entry->pointer entry))))
(pointer->oid ret)))))
(define tree-entry-name
(let ((proc (libgit2->procedure '* "git_tree_entry_name" '(*))))
(lambda (entry)
(let ((ret (proc (tree-entry->pointer entry))))
(pointer->string ret)))))
(define tree-entry->object
(let ((proc (libgit2->procedure* "git_tree_entry_to_object" '(* * *))))
(lambda (repository entry)
(let ((out (make-double-pointer)))
(proc out (repository->pointer repository) (tree-entry->pointer entry))
(pointer->object! (dereference-pointer out))))))
(define tree-entry-type
(let ((proc (libgit2->procedure int "git_tree_entry_type" '(*))))
(lambda (entry)
(proc (tree-entry->pointer entry)))))
;; FIXME: https://libgit2.github.com/libgit2/#HEAD/group/tree/git_tree_entrycount
(define %tree-free (libgit2->pointer "git_tree_free"))
(define (pointer->tree! pointer)
(set-pointer-finalizer! pointer %tree-free)
(pointer->tree pointer))
(define tree-id
(let ((proc (libgit2->procedure '* "git_tree_id" '(*))))
(lambda (tree)
(pointer->oid (proc (tree->pointer tree))))))
(define tree-lookup
(let ((proc (libgit2->procedure* "git_tree_lookup" '(* * *))))
(lambda (repository id)
(let ((out (make-double-pointer)))
(proc out
(repository->pointer repository)
(oid->pointer id))
(pointer->tree! (dereference-pointer out))))))
;; FIXME: https://libgit2.github.com/libgit2/#HEAD/group/tree/git_tree_lookup_prefix
;; FIXME: https://libgit2.github.com/libgit2/#HEAD/group/tree/git_tree_owner
(define tree-walk
(let ((proc (libgit2->procedure* "git_tree_walk" `(* ,int * *))))
(lambda (tree mode callback)
;; If the callback returns a positive value, the passed entry will
;; be skipped on the traversal (in pre mode). A negative value stops
;; the walk.
(let ((callback* (procedure->pointer int
(lambda (root entry _)
(callback (pointer->string root)
(pointer->tree-entry entry)))
(list '* '* '*))))
(proc (tree->pointer tree) mode callback* %null-pointer)))))
(define (tree-fold proc knil tree)
(let ((out knil))
(tree-walk tree TREEWALK-PRE
(lambda (root entry)
;; XXX: this is not portable
(let ((filepath (string-append root (tree-entry-name entry))))
(set! out (proc filepath out))
0)))
out))
(define (tree-list tree)
(tree-fold cons '() tree))
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