;;; git.el --- A user interface for git
-;; Copyright (C) 2005, 2006, 2007 Alexandre Julliard <julliard@winehq.org>
+;; Copyright (C) 2005, 2006, 2007, 2008, 2009 Alexandre Julliard <julliard@winehq.org>
;; Version: 1.0
;; To start: `M-x git-status'
;;
;; TODO
-;; - portability to XEmacs
;; - diff against other branch
;; - renaming files from the status buffer
;; - creating tags
;; - fetch/pull
-;; - switching branches
;; - revlist browser
;; - git-show-branch browser
-;; - menus
+;;
+
+;;; Compatibility:
+;;
+;; This file works on GNU Emacs 21 or later. It may work on older
+;; versions but this is not guaranteed.
+;;
+;; It may work on XEmacs 21, provided that you first install the ewoc
+;; and log-edit packages.
;;
(eval-when-compile (require 'cl))
(with-current-buffer buffer
(cd dir)
(apply #'call-process-region start end program
- nil (list output-buffer nil) nil args))))
+ nil (list output-buffer t) nil args))))
(defun git-run-command-buffer (buffer-name &rest args)
"Run a git command, sending the output to a buffer named BUFFER-NAME."
(defun git-run-command-region (buffer start end env &rest args)
"Run a git command with specified buffer region as input."
- (unless (eq 0 (if env
- (git-run-process-region
- buffer start end "env"
- (append (git-get-env-strings env) (list "git") args))
+ (with-temp-buffer
+ (if (eq 0 (if env
(git-run-process-region
- buffer start end "git" args)))
- (error "Failed to run \"git %s\":\n%s" (mapconcat (lambda (x) x) args " ") (buffer-string))))
+ buffer start end "env"
+ (append (git-get-env-strings env) (list "git") args))
+ (git-run-process-region buffer start end "git" args)))
+ (buffer-string)
+ (display-message-or-buffer (current-buffer))
+ nil)))
(defun git-run-hook (hook env &rest args)
"Run a git hook and display its output if any."
(unless newval (push "-d" args))
(apply 'git-call-process-display-error "update-ref" args)))
+(defun git-for-each-ref (&rest specs)
+ "Return a list of refs using git-for-each-ref.
+Each entry is a cons of (SHORT-NAME . FULL-NAME)."
+ (let (refs)
+ (with-temp-buffer
+ (apply #'git-call-process t "for-each-ref" "--format=%(refname)" specs)
+ (goto-char (point-min))
+ (while (re-search-forward "^[^/\n]+/[^/\n]+/\\(.+\\)$" nil t)
+ (push (cons (match-string 1) (match-string 0)) refs)))
+ (nreverse refs)))
+
(defun git-read-tree (tree &optional index-file)
"Read a tree into the index file."
(let ((process-environment
(git-get-string-sha1
(git-call-process-string-display-error "write-tree"))))
-(defun git-commit-tree (buffer tree head)
- "Call git-commit-tree with buffer as input and return the resulting commit SHA1."
+(defun git-commit-tree (buffer tree parent)
+ "Create a commit and possibly update HEAD.
+Create a commit with the message in BUFFER using the tree with hash TREE.
+Use PARENT as the parent of the new commit. If PARENT is the current \"HEAD\",
+update the \"HEAD\" reference to the new commit."
(let ((author-name (git-get-committer-name))
(author-email (git-get-committer-email))
(subject "commit (initial): ")
author-date log-start log-end args coding-system-for-write)
- (when head
+ (when parent
(setq subject "commit: ")
(push "-p" args)
- (push head args))
+ (push parent args))
(with-current-buffer buffer
(goto-char (point-min))
(if
(setq coding-system-for-write buffer-file-coding-system))
(let ((commit
(git-get-string-sha1
- (with-output-to-string
- (with-current-buffer standard-output
- (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
- ("GIT_AUTHOR_EMAIL" . ,author-email)
- ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
- ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
- (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
- (apply #'git-run-command-region
- buffer log-start log-end env
- "commit-tree" tree (nreverse args))))))))
- (and (git-update-ref "HEAD" commit head subject)
- commit))))
+ (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
+ ("GIT_AUTHOR_EMAIL" . ,author-email)
+ ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
+ ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
+ (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
+ (apply #'git-run-command-region
+ buffer log-start log-end env
+ "commit-tree" tree (nreverse args))))))
+ (when commit (git-update-ref "HEAD" commit parent subject))
+ commit)))
(defun git-empty-db-p ()
"Check if the git db is empty (no commit done yet)."
(git-fileinfo->needs-refresh info) t)))
(defun git-status-filenames-map (status func files &rest args)
- "Apply FUNC to the status files names in the FILES list."
+ "Apply FUNC to the status files names in the FILES list.
+The list must be sorted."
(when files
- (setq files (sort files #'string-lessp))
(let ((file (pop files))
(node (ewoc-nth status 0)))
(while (and file node)
(setq file (pop files))))))))
(defun git-set-filenames-state (status files state)
- "Set the state of a list of named files."
+ "Set the state of a list of named files. The list must be sorted"
(when files
(git-status-filenames-map status #'git-set-fileinfo-state files state)
(unless state ;; delete files whose state has been set to nil
(let* ((old-type (lsh (or old-perm 0) -9))
(new-type (lsh (or new-perm 0) -9))
(str (case new-type
- (?\100 ;; file
+ (64 ;; file
(case old-type
- (?\100 nil)
- (?\120 " (type change symlink -> file)")
- (?\160 " (type change subproject -> file)")))
- (?\120 ;; symlink
+ (64 nil)
+ (80 " (type change symlink -> file)")
+ (112 " (type change subproject -> file)")))
+ (80 ;; symlink
(case old-type
- (?\100 " (type change file -> symlink)")
- (?\160 " (type change subproject -> symlink)")
+ (64 " (type change file -> symlink)")
+ (112 " (type change subproject -> symlink)")
(t " (symlink)")))
- (?\160 ;; subproject
+ (112 ;; subproject
(case old-type
- (?\100 " (type change file -> subproject)")
- (?\120 " (type change symlink -> subproject)")
+ (64 " (type change file -> subproject)")
+ (80 " (type change symlink -> subproject)")
(t " (subproject)")))
- (?\110 nil) ;; directory (internal, not a real git state)
- (?\000 ;; deleted or unknown
+ (72 nil) ;; directory (internal, not a real git state)
+ (0 ;; deleted or unknown
(case old-type
- (?\120 " (symlink)")
- (?\160 " (subproject)")))
+ (80 " (symlink)")
+ (112 " (subproject)")))
(t (format " (unknown type %o)" new-type)))))
(cond (str (propertize str 'face 'git-status-face))
- ((eq new-type ?\110) "/")
+ ((eq new-type 72) "/")
(t ""))))
(defun git-rename-as-string (info)
(let (unmerged-files)
(while (re-search-forward "[0-7]\\{6\\} [0-9a-f]\\{40\\} [123]\t\\([^\0]+\\)\0" nil t)
(push (match-string 1) unmerged-files))
+ (setq unmerged-files (nreverse unmerged-files)) ;; assume it is sorted already
(git-set-filenames-state status unmerged-files 'unmerged))))
(defun git-get-exclude-files ()
(append options (mapcar (lambda (f) (concat "--exclude-from=" f)) exclude-files)))))
(defun git-update-status-files (&optional files mark-files)
- "Update the status of FILES from the index."
+ "Update the status of FILES from the index.
+The FILES list must be sorted."
(unless git-status (error "Not in git-status buffer."))
;; set the needs-update flag on existing files
- (if (setq files (sort files #'string-lessp))
+ (if files
(git-status-filenames-map
git-status (lambda (info) (setf (git-fileinfo->needs-update info) t)) files)
(ewoc-map (lambda (info) (setf (git-fileinfo->needs-update info) t) nil) git-status)
(git-call-process nil "update-index" "--refresh")
(when git-show-uptodate
(git-run-ls-files-cached git-status nil 'uptodate)))
- (let* ((remaining-files
+ (let ((remaining-files
(if (git-empty-db-p) ; we need some special handling for an empty db
(git-run-ls-files-cached git-status files 'added)
(git-run-diff-index git-status files))))
(list (ewoc-data (ewoc-locate git-status)))))
(defun git-marked-files-state (&rest states)
- "Return marked files that are in the specified states."
+ "Return a sorted list of marked files that are in the specified states."
(let ((files (git-marked-files))
result)
(dolist (info files)
(when (memq (git-fileinfo->state info) states)
(push info result)))
- result))
+ (nreverse result)))
(defun git-refresh-files ()
"Refresh all files that need it and clear the needs-refresh flag."
(unless files
(push (file-relative-name (read-file-name "File to remove: " nil nil t)) files))
(if (yes-or-no-p
- (format "Remove %d file%s? " (length files) (if (> (length files) 1) "s" "")))
+ (if (cdr files)
+ (format "Remove %d files? " (length files))
+ (format "Remove %s? " (car files))))
(progn
(dolist (name files)
(ignore-errors
added modified)
(when (and files
(yes-or-no-p
- (format "Revert %d file%s? " (length files) (if (> (length files) 1) "s" ""))))
+ (if (cdr files)
+ (format "Revert %d files? " (length files))
+ (format "Revert %s? " (git-fileinfo->name (car files))))))
(dolist (info files)
(case (git-fileinfo->state info)
('added (push (git-fileinfo->name info) added))
(or (not added)
(apply 'git-call-process-display-error "update-index" "--force-remove" "--" added))
(or (not modified)
- (apply 'git-call-process-display-error "checkout" "HEAD" modified)))))
- (git-update-status-files (append added modified))
+ (apply 'git-call-process-display-error "checkout" "HEAD" modified))))
+ (names (git-get-filenames files)))
+ (git-update-status-files names)
(when ok
(dolist (file modified)
(let ((buffer (get-file-buffer file)))
(when buffer (with-current-buffer buffer (revert-buffer t t t)))))
- (git-success-message "Reverted" (git-get-filenames files)))))))
+ (git-success-message "Reverted" names))))))
(defun git-resolve-file ()
"Resolve conflicts in marked file(s)."
(log-edit-diff-function . git-log-edit-diff)) buffer)
(log-edit 'git-do-commit nil 'git-log-edit-files buffer))
(setq font-lock-keywords (font-lock-compile-keywords git-log-edit-font-lock-keywords))
+ (setq paragraph-separate (concat (regexp-quote git-log-msg-separator) "$\\|Author: \\|Date: \\|Merge: \\|Signed-off-by: \\|\f\\|[ ]*$"))
(setq buffer-file-coding-system coding-system)
(re-search-forward (regexp-quote (concat git-log-msg-separator "\n")) nil t))))
(mapconcat #'identity msg "\n"))))
(defun git-get-commit-files (commit)
- "Retrieve the list of files modified by COMMIT."
+ "Retrieve a sorted list of files modified by COMMIT."
(let (files)
(with-temp-buffer
(git-call-process t "diff-tree" "-m" "-r" "-z" "--name-only" "--no-commit-id" "--root" commit)
(goto-char (point-min))
(while (re-search-forward "\\([^\0]*\\)\0" nil t 1)
(push (match-string 1) files)))
- files))
+ (sort files #'string-lessp)))
+
+(defun git-read-commit-name (prompt &optional default)
+ "Ask for a commit name, with completion for local branch, remote branch and tag."
+ (completing-read prompt
+ (list* "HEAD" "ORIG_HEAD" "FETCH_HEAD" (mapcar #'car (git-for-each-ref)))
+ nil nil nil nil default))
+
+(defun git-checkout (branch &optional merge)
+ "Checkout a branch, tag, or any commit.
+Use a prefix arg if git should merge while checking out."
+ (interactive
+ (list (git-read-commit-name "Checkout: ")
+ current-prefix-arg))
+ (unless git-status (error "Not in git-status buffer."))
+ (let ((args (list branch "--")))
+ (when merge (push "-m" args))
+ (when (apply #'git-call-process-display-error "checkout" args)
+ (git-update-status-files))))
+
+(defun git-branch (branch)
+ "Create a branch from the current HEAD and switch to it."
+ (interactive (list (git-read-commit-name "Branch: ")))
+ (unless git-status (error "Not in git-status buffer."))
+ (if (git-rev-parse (concat "refs/heads/" branch))
+ (if (yes-or-no-p (format "Branch %s already exists, replace it? " branch))
+ (and (git-call-process-display-error "branch" "-f" branch)
+ (git-call-process-display-error "checkout" branch))
+ (message "Canceled."))
+ (git-call-process-display-error "checkout" "-b" branch))
+ (git-refresh-ewoc-hf git-status))
(defun git-amend-commit ()
"Undo the last commit on HEAD, and set things up to commit an
(git-setup-commit-buffer commit)
(git-commit-file))))
+(defun git-cherry-pick-commit (arg)
+ "Cherry-pick a commit."
+ (interactive (list (git-read-commit-name "Cherry-pick commit: ")))
+ (unless git-status (error "Not in git-status buffer."))
+ (let ((commit (git-rev-parse (concat arg "^0"))))
+ (unless commit (error "Not a valid commit '%s'." arg))
+ (when (git-rev-parse (concat commit "^2"))
+ (error "Cannot cherry-pick a merge commit."))
+ (let ((files (git-get-commit-files commit))
+ (ok (git-call-process-display-error "cherry-pick" "-n" commit)))
+ (git-update-status-files files ok)
+ (with-current-buffer (git-setup-commit-buffer commit)
+ (goto-char (point-min))
+ (if (re-search-forward "^\n*Signed-off-by:" nil t 1)
+ (goto-char (match-beginning 0))
+ (goto-char (point-max)))
+ (insert "(cherry picked from commit " commit ")\n"))
+ (when ok (git-commit-file)))))
+
+(defun git-revert-commit (arg)
+ "Revert a commit."
+ (interactive (list (git-read-commit-name "Revert commit: ")))
+ (unless git-status (error "Not in git-status buffer."))
+ (let ((commit (git-rev-parse (concat arg "^0"))))
+ (unless commit (error "Not a valid commit '%s'." arg))
+ (when (git-rev-parse (concat commit "^2"))
+ (error "Cannot revert a merge commit."))
+ (let ((files (git-get-commit-files commit))
+ (subject (git-get-commit-description commit))
+ (ok (git-call-process-display-error "revert" "-n" commit)))
+ (git-update-status-files files ok)
+ (when (string-match "^[0-9a-f]+ - \\(.*\\)$" subject)
+ (setq subject (match-string 1 subject)))
+ (git-setup-log-buffer (get-buffer-create "*git-commit*")
+ (git-get-merge-heads) nil nil (format "Revert \"%s\"" subject) nil
+ (format "This reverts commit %s.\n" commit))
+ (when ok (git-commit-file)))))
+
(defun git-find-file ()
"Visit the current file in its own buffer."
(interactive)
(define-key map "\M-\C-?" 'git-unmark-all)
; the commit submap
(define-key commit-map "\C-a" 'git-amend-commit)
+ (define-key commit-map "\C-b" 'git-branch)
+ (define-key commit-map "\C-o" 'git-checkout)
+ (define-key commit-map "\C-p" 'git-cherry-pick-commit)
+ (define-key commit-map "\C-v" 'git-revert-commit)
; the diff submap
(define-key diff-map "b" 'git-diff-file-base)
(define-key diff-map "c" 'git-diff-file-combined)
`("Git"
["Refresh" git-refresh-status t]
["Commit" git-commit-file t]
+ ["Checkout..." git-checkout t]
+ ["New Branch..." git-branch t]
+ ["Cherry-pick Commit..." git-cherry-pick-commit t]
+ ["Revert Commit..." git-revert-commit t]
("Merge"
["Next Unmerged File" git-next-unmerged-file t]
["Prev Unmerged File" git-prev-unmerged-file t]