;;; hyde-git.el
;; Copyright (C) 2004 Noufal Ibrahim <noufal at nibrahim.net.in>
;;
;; This program is not part of Gnu Emacs
;;
;; hyde-git.el 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.
;;
;; This program 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 this program; if not, write to the Free Software
;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

(defcustom hyde/git/remote
  "origin"
  "The remote which should be pushed to"
  :group 'hyde)

(defcustom hyde/git/remote-branch
  "master"
  "The name of the branch on the remote which should be pushed to"
  :group 'hyde)

(defun hyde/git/uncommittedp (repo file)
  "Returns true if there are uncommitted changes for the current file"
  (let (
	(cmd (format "cd '%s' && git diff-files --quiet '%s' > /dev/null" (expand-file-name repo) file))
	)
    (= (shell-command cmd) 1)))


(defun hyde/git/unpushedp (repo file)
  "Returns true if there are unpushed changes for the current file"
  (let (
	(cmd 
	 (format "cd '%s' && git log --exit-code %s/%s..HEAD '%s' > /dev/null" (expand-file-name repo) hyde/git/remote hyde/git/remote-branch file)
	 ))
    (= (shell-command cmd) 1)))

(defun hyde/git/pushedp (repo file)
  "Returns true if there are no uncommitted changes in the file"
  (not (hyde/git/uncommittedp repo file)))

(defun hyde/git/add (repo file)
  "Adds the given file to the repository"
  (let ((cmd (format "cd '%s' && git add '%s' > /dev/null" (expand-file-name repo) file)))
    (shell-command cmd)))

(defun hyde/git/delete (repo file)
  "Deletes a given file from the repository"
  (let ((cmd (format "cd '%s' && git rm '%s' > /dev/null" (expand-file-name repo) file)))
    (shell-command cmd)))

(defun hyde/git/commit (repo files commit-message)
  "Commits the given files to the repository"
  (if files
      ;; If files gives, add each one and then commit it.
      (progn
        ;; Add each of the files in the list
        (dolist (f files)
          (message (concat "Dealing with " f))
          (let ((cmd (format "cd '%s' && git add '%s'" (expand-file-name repo) f)))
            (progn
              (message (concat "Running " cmd))
              (shell-command cmd))))
        ;; Commit them
        (let ((cmd (format "cd '%s' && git commit -m '%s' > /dev/null" (expand-file-name repo) commit-message)))
          (progn
            (message (concat "Running " cmd))
            (shell-command cmd))))
    ;; Otherwise, simply commit. Don't add. 
    (let ((cmd (format "cd '%s' && git commit -m '%s' > /dev/null" (expand-file-name repo) commit-message)))
      (shell-command cmd))))
    

(defun hyde/git/push (repo)
  "Pushes the repository"
  (let ((cmd (format "cd '%s' && git push %s %s > /dev/null" (expand-file-name repo) hyde/git/remote hyde/git/remote-branch)))
    (message cmd)
    (shell-command cmd)))

(defun hyde/git/rename (base from to)
  "Rename the file in BASE from FROM to TO"
  (let ((cmd (format "cd '%s' && git mv '%s' '%s' > /dev/null" (expand-file-name base) from to)))
    (shell-command cmd)))

(provide 'hyde-git)

;;; hyde-git.el ends here