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contrib / emacs / git.elon commit Merge branch 'np/progress' (265ae18)
   1;;; git.el --- A user interface for git
   2
   3;; Copyright (C) 2005, 2006, 2007 Alexandre Julliard <julliard@winehq.org>
   4
   5;; Version: 1.0
   6
   7;; This program is free software; you can redistribute it and/or
   8;; modify it under the terms of the GNU General Public License as
   9;; published by the Free Software Foundation; either version 2 of
  10;; the License, or (at your option) any later version.
  11;;
  12;; This program is distributed in the hope that it will be
  13;; useful, but WITHOUT ANY WARRANTY; without even the implied
  14;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  15;; PURPOSE.  See the GNU General Public License for more details.
  16;;
  17;; You should have received a copy of the GNU General Public
  18;; License along with this program; if not, write to the Free
  19;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20;; MA 02111-1307 USA
  21
  22;;; Commentary:
  23
  24;; This file contains an interface for the git version control
  25;; system. It provides easy access to the most frequently used git
  26;; commands. The user interface is as far as possible identical to
  27;; that of the PCL-CVS mode.
  28;;
  29;; To install: put this file on the load-path and place the following
  30;; in your .emacs file:
  31;;
  32;;    (require 'git)
  33;;
  34;; To start: `M-x git-status'
  35;;
  36;; TODO
  37;;  - portability to XEmacs
  38;;  - better handling of subprocess errors
  39;;  - diff against other branch
  40;;  - renaming files from the status buffer
  41;;  - creating tags
  42;;  - fetch/pull
  43;;  - switching branches
  44;;  - revlist browser
  45;;  - git-show-branch browser
  46;;  - menus
  47;;
  48
  49(eval-when-compile (require 'cl))
  50(require 'ewoc)
  51(require 'log-edit)
  52
  53
  54;;;; Customizations
  55;;;; ------------------------------------------------------------
  56
  57(defgroup git nil
  58  "A user interface for the git versioning system."
  59  :group 'tools)
  60
  61(defcustom git-committer-name nil
  62  "User name to use for commits.
  63The default is to fall back to the repository config,
  64then to `add-log-full-name' and then to `user-full-name'."
  65  :group 'git
  66  :type '(choice (const :tag "Default" nil)
  67                 (string :tag "Name")))
  68
  69(defcustom git-committer-email nil
  70  "Email address to use for commits.
  71The default is to fall back to the git repository config,
  72then to `add-log-mailing-address' and then to `user-mail-address'."
  73  :group 'git
  74  :type '(choice (const :tag "Default" nil)
  75                 (string :tag "Email")))
  76
  77(defcustom git-commits-coding-system nil
  78  "Default coding system for the log message of git commits."
  79  :group 'git
  80  :type '(choice (const :tag "From repository config" nil)
  81                 (coding-system)))
  82
  83(defcustom git-append-signed-off-by nil
  84  "Whether to append a Signed-off-by line to the commit message before editing."
  85  :group 'git
  86  :type 'boolean)
  87
  88(defcustom git-reuse-status-buffer t
  89  "Whether `git-status' should try to reuse an existing buffer
  90if there is already one that displays the same directory."
  91  :group 'git
  92  :type 'boolean)
  93
  94(defcustom git-per-dir-ignore-file ".gitignore"
  95  "Name of the per-directory ignore file."
  96  :group 'git
  97  :type 'string)
  98
  99(defcustom git-show-uptodate nil
 100  "Whether to display up-to-date files."
 101  :group 'git
 102  :type 'boolean)
 103
 104(defcustom git-show-ignored nil
 105  "Whether to display ignored files."
 106  :group 'git
 107  :type 'boolean)
 108
 109(defcustom git-show-unknown t
 110  "Whether to display unknown files."
 111  :group 'git
 112  :type 'boolean)
 113
 114
 115(defface git-status-face
 116  '((((class color) (background light)) (:foreground "purple"))
 117    (((class color) (background dark)) (:foreground "salmon")))
 118  "Git mode face used to highlight added and modified files."
 119  :group 'git)
 120
 121(defface git-unmerged-face
 122  '((((class color) (background light)) (:foreground "red" :bold t))
 123    (((class color) (background dark)) (:foreground "red" :bold t)))
 124  "Git mode face used to highlight unmerged files."
 125  :group 'git)
 126
 127(defface git-unknown-face
 128  '((((class color) (background light)) (:foreground "goldenrod" :bold t))
 129    (((class color) (background dark)) (:foreground "goldenrod" :bold t)))
 130  "Git mode face used to highlight unknown files."
 131  :group 'git)
 132
 133(defface git-uptodate-face
 134  '((((class color) (background light)) (:foreground "grey60"))
 135    (((class color) (background dark)) (:foreground "grey40")))
 136  "Git mode face used to highlight up-to-date files."
 137  :group 'git)
 138
 139(defface git-ignored-face
 140  '((((class color) (background light)) (:foreground "grey60"))
 141    (((class color) (background dark)) (:foreground "grey40")))
 142  "Git mode face used to highlight ignored files."
 143  :group 'git)
 144
 145(defface git-mark-face
 146  '((((class color) (background light)) (:foreground "red" :bold t))
 147    (((class color) (background dark)) (:foreground "tomato" :bold t)))
 148  "Git mode face used for the file marks."
 149  :group 'git)
 150
 151(defface git-header-face
 152  '((((class color) (background light)) (:foreground "blue"))
 153    (((class color) (background dark)) (:foreground "blue")))
 154  "Git mode face used for commit headers."
 155  :group 'git)
 156
 157(defface git-separator-face
 158  '((((class color) (background light)) (:foreground "brown"))
 159    (((class color) (background dark)) (:foreground "brown")))
 160  "Git mode face used for commit separator."
 161  :group 'git)
 162
 163(defface git-permission-face
 164  '((((class color) (background light)) (:foreground "green" :bold t))
 165    (((class color) (background dark)) (:foreground "green" :bold t)))
 166  "Git mode face used for permission changes."
 167  :group 'git)
 168
 169
 170;;;; Utilities
 171;;;; ------------------------------------------------------------
 172
 173(defconst git-log-msg-separator "--- log message follows this line ---")
 174
 175(defvar git-log-edit-font-lock-keywords
 176  `(("^\\(Author:\\|Date:\\|Parent:\\|Signed-off-by:\\)\\(.*\\)$"
 177     (1 font-lock-keyword-face)
 178     (2 font-lock-function-name-face))
 179    (,(concat "^\\(" (regexp-quote git-log-msg-separator) "\\)$")
 180     (1 font-lock-comment-face))))
 181
 182(defun git-get-env-strings (env)
 183  "Build a list of NAME=VALUE strings from a list of environment strings."
 184  (mapcar (lambda (entry) (concat (car entry) "=" (cdr entry))) env))
 185
 186(defun git-call-process-env (buffer env &rest args)
 187  "Wrapper for call-process that sets environment strings."
 188  (if env
 189      (apply #'call-process "env" nil buffer nil
 190             (append (git-get-env-strings env) (list "git") args))
 191    (apply #'call-process "git" nil buffer nil args)))
 192
 193(defun git-call-process-env-string (env &rest args)
 194  "Wrapper for call-process that sets environment strings,
 195and returns the process output as a string."
 196  (with-temp-buffer
 197    (and (eq 0 (apply #' git-call-process-env t env args))
 198         (buffer-string))))
 199
 200(defun git-run-process-region (buffer start end program args)
 201  "Run a git process with a buffer region as input."
 202  (let ((output-buffer (current-buffer))
 203        (dir default-directory))
 204    (with-current-buffer buffer
 205      (cd dir)
 206      (apply #'call-process-region start end program
 207             nil (list output-buffer nil) nil args))))
 208
 209(defun git-run-command-buffer (buffer-name &rest args)
 210  "Run a git command, sending the output to a buffer named BUFFER-NAME."
 211  (let ((dir default-directory)
 212        (buffer (get-buffer-create buffer-name)))
 213    (message "Running git %s..." (car args))
 214    (with-current-buffer buffer
 215      (let ((default-directory dir)
 216            (buffer-read-only nil))
 217        (erase-buffer)
 218        (apply #'git-call-process-env buffer nil args)))
 219    (message "Running git %s...done" (car args))
 220    buffer))
 221
 222(defun git-run-command-region (buffer start end env &rest args)
 223  "Run a git command with specified buffer region as input."
 224  (unless (eq 0 (if env
 225                    (git-run-process-region
 226                     buffer start end "env"
 227                     (append (git-get-env-strings env) (list "git") args))
 228                  (git-run-process-region
 229                   buffer start end "git" args)))
 230    (error "Failed to run \"git %s\":\n%s" (mapconcat (lambda (x) x) args " ") (buffer-string))))
 231
 232(defun git-run-hook (hook env &rest args)
 233  "Run a git hook and display its output if any."
 234  (let ((dir default-directory)
 235        (hook-name (expand-file-name (concat ".git/hooks/" hook))))
 236    (or (not (file-executable-p hook-name))
 237        (let (status (buffer (get-buffer-create "*Git Hook Output*")))
 238          (with-current-buffer buffer
 239            (erase-buffer)
 240            (cd dir)
 241            (setq status
 242                  (if env
 243                      (apply #'call-process "env" nil (list buffer t) nil
 244                             (append (git-get-env-strings env) (list hook-name) args))
 245                    (apply #'call-process hook-name nil (list buffer t) nil args))))
 246          (display-message-or-buffer buffer)
 247          (eq 0 status)))))
 248
 249(defun git-get-string-sha1 (string)
 250  "Read a SHA1 from the specified string."
 251  (and string
 252       (string-match "[0-9a-f]\\{40\\}" string)
 253       (match-string 0 string)))
 254
 255(defun git-get-committer-name ()
 256  "Return the name to use as GIT_COMMITTER_NAME."
 257  ; copied from log-edit
 258  (or git-committer-name
 259      (git-config "user.name")
 260      (and (boundp 'add-log-full-name) add-log-full-name)
 261      (and (fboundp 'user-full-name) (user-full-name))
 262      (and (boundp 'user-full-name) user-full-name)))
 263
 264(defun git-get-committer-email ()
 265  "Return the email address to use as GIT_COMMITTER_EMAIL."
 266  ; copied from log-edit
 267  (or git-committer-email
 268      (git-config "user.email")
 269      (and (boundp 'add-log-mailing-address) add-log-mailing-address)
 270      (and (fboundp 'user-mail-address) (user-mail-address))
 271      (and (boundp 'user-mail-address) user-mail-address)))
 272
 273(defun git-get-commits-coding-system ()
 274  "Return the coding system to use for commits."
 275  (let ((repo-config (git-config "i18n.commitencoding")))
 276    (or git-commits-coding-system
 277        (and repo-config
 278             (fboundp 'locale-charset-to-coding-system)
 279             (locale-charset-to-coding-system repo-config))
 280      'utf-8)))
 281
 282(defun git-get-logoutput-coding-system ()
 283  "Return the coding system used for git-log output."
 284  (let ((repo-config (or (git-config "i18n.logoutputencoding")
 285                         (git-config "i18n.commitencoding"))))
 286    (or git-commits-coding-system
 287        (and repo-config
 288             (fboundp 'locale-charset-to-coding-system)
 289             (locale-charset-to-coding-system repo-config))
 290      'utf-8)))
 291
 292(defun git-escape-file-name (name)
 293  "Escape a file name if necessary."
 294  (if (string-match "[\n\t\"\\]" name)
 295      (concat "\""
 296              (mapconcat (lambda (c)
 297                   (case c
 298                     (?\n "\\n")
 299                     (?\t "\\t")
 300                     (?\\ "\\\\")
 301                     (?\" "\\\"")
 302                     (t (char-to-string c))))
 303                 name "")
 304              "\"")
 305    name))
 306
 307(defun git-success-message (text files)
 308  "Print a success message after having handled FILES."
 309  (let ((n (length files)))
 310    (if (equal n 1)
 311        (message "%s %s" text (car files))
 312      (message "%s %d files" text n))))
 313
 314(defun git-get-top-dir (dir)
 315  "Retrieve the top-level directory of a git tree."
 316  (let ((cdup (with-output-to-string
 317                (with-current-buffer standard-output
 318                  (cd dir)
 319                  (unless (eq 0 (call-process "git" nil t nil "rev-parse" "--show-cdup"))
 320                    (error "cannot find top-level git tree for %s." dir))))))
 321    (expand-file-name (concat (file-name-as-directory dir)
 322                              (car (split-string cdup "\n"))))))
 323
 324;stolen from pcl-cvs
 325(defun git-append-to-ignore (file)
 326  "Add a file name to the ignore file in its directory."
 327  (let* ((fullname (expand-file-name file))
 328         (dir (file-name-directory fullname))
 329         (name (file-name-nondirectory fullname))
 330         (ignore-name (expand-file-name git-per-dir-ignore-file dir))
 331         (created (not (file-exists-p ignore-name))))
 332  (save-window-excursion
 333    (set-buffer (find-file-noselect ignore-name))
 334    (goto-char (point-max))
 335    (unless (zerop (current-column)) (insert "\n"))
 336    (insert "/" name "\n")
 337    (sort-lines nil (point-min) (point-max))
 338    (save-buffer))
 339  (when created
 340    (git-call-process-env nil nil "update-index" "--add" "--" (file-relative-name ignore-name)))
 341  (git-update-status-files (list (file-relative-name ignore-name)) 'unknown)))
 342
 343; propertize definition for XEmacs, stolen from erc-compat
 344(eval-when-compile
 345  (unless (fboundp 'propertize)
 346    (defun propertize (string &rest props)
 347      (let ((string (copy-sequence string)))
 348        (while props
 349          (put-text-property 0 (length string) (nth 0 props) (nth 1 props) string)
 350          (setq props (cddr props)))
 351        string))))
 352
 353;;;; Wrappers for basic git commands
 354;;;; ------------------------------------------------------------
 355
 356(defun git-rev-parse (rev)
 357  "Parse a revision name and return its SHA1."
 358  (git-get-string-sha1
 359   (git-call-process-env-string nil "rev-parse" rev)))
 360
 361(defun git-config (key)
 362  "Retrieve the value associated to KEY in the git repository config file."
 363  (let ((str (git-call-process-env-string nil "config" key)))
 364    (and str (car (split-string str "\n")))))
 365
 366(defun git-symbolic-ref (ref)
 367  "Wrapper for the git-symbolic-ref command."
 368  (let ((str (git-call-process-env-string nil "symbolic-ref" ref)))
 369    (and str (car (split-string str "\n")))))
 370
 371(defun git-update-ref (ref newval &optional oldval reason)
 372  "Update a reference by calling git-update-ref."
 373  (let ((args (and oldval (list oldval))))
 374    (push newval args)
 375    (push ref args)
 376    (when reason
 377     (push reason args)
 378     (push "-m" args))
 379    (eq 0 (apply #'git-call-process-env nil nil "update-ref" args))))
 380
 381(defun git-read-tree (tree &optional index-file)
 382  "Read a tree into the index file."
 383  (apply #'git-call-process-env nil
 384         (if index-file `(("GIT_INDEX_FILE" . ,index-file)) nil)
 385         "read-tree" (if tree (list tree))))
 386
 387(defun git-write-tree (&optional index-file)
 388  "Call git-write-tree and return the resulting tree SHA1 as a string."
 389  (git-get-string-sha1
 390   (git-call-process-env-string (and index-file `(("GIT_INDEX_FILE" . ,index-file))) "write-tree")))
 391
 392(defun git-commit-tree (buffer tree head)
 393  "Call git-commit-tree with buffer as input and return the resulting commit SHA1."
 394  (let ((author-name (git-get-committer-name))
 395        (author-email (git-get-committer-email))
 396        (subject "commit (initial): ")
 397        author-date log-start log-end args coding-system-for-write)
 398    (when head
 399      (setq subject "commit: ")
 400      (push "-p" args)
 401      (push head args))
 402    (with-current-buffer buffer
 403      (goto-char (point-min))
 404      (if
 405          (setq log-start (re-search-forward (concat "^" (regexp-quote git-log-msg-separator) "\n") nil t))
 406          (save-restriction
 407            (narrow-to-region (point-min) log-start)
 408            (goto-char (point-min))
 409            (when (re-search-forward "^Author: +\\(.*?\\) *<\\(.*\\)> *$" nil t)
 410              (setq author-name (match-string 1)
 411                    author-email (match-string 2)))
 412            (goto-char (point-min))
 413            (when (re-search-forward "^Date: +\\(.*\\)$" nil t)
 414              (setq author-date (match-string 1)))
 415            (goto-char (point-min))
 416            (while (re-search-forward "^Parent: +\\([0-9a-f]+\\)" nil t)
 417              (unless (string-equal head (match-string 1))
 418                (setq subject "commit (merge): ")
 419                (push "-p" args)
 420                (push (match-string 1) args))))
 421        (setq log-start (point-min)))
 422      (setq log-end (point-max))
 423      (goto-char log-start)
 424      (when (re-search-forward ".*$" nil t)
 425        (setq subject (concat subject (match-string 0))))
 426      (setq coding-system-for-write buffer-file-coding-system))
 427    (let ((commit
 428           (git-get-string-sha1
 429            (with-output-to-string
 430              (with-current-buffer standard-output
 431                (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
 432                             ("GIT_AUTHOR_EMAIL" . ,author-email)
 433                             ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
 434                             ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
 435                  (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
 436                  (apply #'git-run-command-region
 437                         buffer log-start log-end env
 438                         "commit-tree" tree (nreverse args))))))))
 439      (and (git-update-ref "HEAD" commit head subject)
 440           commit))))
 441
 442(defun git-empty-db-p ()
 443  "Check if the git db is empty (no commit done yet)."
 444  (not (eq 0 (call-process "git" nil nil nil "rev-parse" "--verify" "HEAD"))))
 445
 446(defun git-get-merge-heads ()
 447  "Retrieve the merge heads from the MERGE_HEAD file if present."
 448  (let (heads)
 449    (when (file-readable-p ".git/MERGE_HEAD")
 450      (with-temp-buffer
 451        (insert-file-contents ".git/MERGE_HEAD" nil nil nil t)
 452        (goto-char (point-min))
 453        (while (re-search-forward "[0-9a-f]\\{40\\}" nil t)
 454          (push (match-string 0) heads))))
 455    (nreverse heads)))
 456
 457(defun git-get-commit-description (commit)
 458  "Get a one-line description of COMMIT."
 459  (let ((coding-system-for-read (git-get-logoutput-coding-system)))
 460    (let ((descr (git-call-process-env-string nil "log" "--max-count=1" "--pretty=oneline" commit)))
 461      (if (and descr (string-match "\\`\\([0-9a-f]\\{40\\}\\) *\\(.*\\)$" descr))
 462          (concat (substring (match-string 1 descr) 0 10) " - " (match-string 2 descr))
 463        descr))))
 464
 465;;;; File info structure
 466;;;; ------------------------------------------------------------
 467
 468; fileinfo structure stolen from pcl-cvs
 469(defstruct (git-fileinfo
 470            (:copier nil)
 471            (:constructor git-create-fileinfo (state name &optional old-perm new-perm rename-state orig-name marked))
 472            (:conc-name git-fileinfo->))
 473  marked              ;; t/nil
 474  state               ;; current state
 475  name                ;; file name
 476  old-perm new-perm   ;; permission flags
 477  rename-state        ;; rename or copy state
 478  orig-name           ;; original name for renames or copies
 479  needs-refresh)      ;; whether file needs to be refreshed
 480
 481(defvar git-status nil)
 482
 483(defun git-clear-status (status)
 484  "Remove everything from the status list."
 485  (ewoc-filter status (lambda (info) nil)))
 486
 487(defun git-set-fileinfo-state (info state)
 488  "Set the state of a file info."
 489  (unless (eq (git-fileinfo->state info) state)
 490    (setf (git-fileinfo->state info) state
 491          (git-fileinfo->old-perm info) 0
 492          (git-fileinfo->new-perm info) 0
 493          (git-fileinfo->rename-state info) nil
 494          (git-fileinfo->orig-name info) nil
 495          (git-fileinfo->needs-refresh info) t)))
 496
 497(defun git-status-filenames-map (status func files &rest args)
 498  "Apply FUNC to the status files names in the FILES list."
 499  (when files
 500    (setq files (sort files #'string-lessp))
 501    (let ((file (pop files))
 502          (node (ewoc-nth status 0)))
 503      (while (and file node)
 504        (let ((info (ewoc-data node)))
 505          (if (string-lessp (git-fileinfo->name info) file)
 506              (setq node (ewoc-next status node))
 507            (if (string-equal (git-fileinfo->name info) file)
 508                (apply func info args))
 509            (setq file (pop files))))))))
 510
 511(defun git-set-filenames-state (status files state)
 512  "Set the state of a list of named files."
 513  (when files
 514    (git-status-filenames-map status #'git-set-fileinfo-state files state)
 515    (unless state  ;; delete files whose state has been set to nil
 516      (ewoc-filter status (lambda (info) (git-fileinfo->state info))))))
 517
 518(defun git-state-code (code)
 519  "Convert from a string to a added/deleted/modified state."
 520  (case (string-to-char code)
 521    (?M 'modified)
 522    (?? 'unknown)
 523    (?A 'added)
 524    (?D 'deleted)
 525    (?U 'unmerged)
 526    (t nil)))
 527
 528(defun git-status-code-as-string (code)
 529  "Format a git status code as string."
 530  (case code
 531    ('modified (propertize "Modified" 'face 'git-status-face))
 532    ('unknown  (propertize "Unknown " 'face 'git-unknown-face))
 533    ('added    (propertize "Added   " 'face 'git-status-face))
 534    ('deleted  (propertize "Deleted " 'face 'git-status-face))
 535    ('unmerged (propertize "Unmerged" 'face 'git-unmerged-face))
 536    ('uptodate (propertize "Uptodate" 'face 'git-uptodate-face))
 537    ('ignored  (propertize "Ignored " 'face 'git-ignored-face))
 538    (t "?       ")))
 539
 540(defun git-rename-as-string (info)
 541  "Return a string describing the copy or rename associated with INFO, or an empty string if none."
 542  (let ((state (git-fileinfo->rename-state info)))
 543    (if state
 544        (propertize
 545         (concat "   ("
 546                 (if (eq state 'copy) "copied from "
 547                   (if (eq (git-fileinfo->state info) 'added) "renamed from "
 548                     "renamed to "))
 549                 (git-escape-file-name (git-fileinfo->orig-name info))
 550                 ")") 'face 'git-status-face)
 551      "")))
 552
 553(defun git-permissions-as-string (old-perm new-perm)
 554  "Format a permission change as string."
 555  (propertize
 556   (if (or (not old-perm)
 557           (not new-perm)
 558           (eq 0 (logand ?\111 (logxor old-perm new-perm))))
 559       "  "
 560     (if (eq 0 (logand ?\111 old-perm)) "+x" "-x"))
 561  'face 'git-permission-face))
 562
 563(defun git-fileinfo-prettyprint (info)
 564  "Pretty-printer for the git-fileinfo structure."
 565  (insert (concat "   " (if (git-fileinfo->marked info) (propertize "*" 'face 'git-mark-face) " ")
 566                  " " (git-status-code-as-string (git-fileinfo->state info))
 567                  " " (git-permissions-as-string (git-fileinfo->old-perm info) (git-fileinfo->new-perm info))
 568                  "  " (git-escape-file-name (git-fileinfo->name info))
 569                  (git-rename-as-string info))))
 570
 571(defun git-insert-info-list (status infolist)
 572  "Insert a list of file infos in the status buffer, replacing existing ones if any."
 573  (setq infolist (sort infolist
 574                       (lambda (info1 info2)
 575                         (string-lessp (git-fileinfo->name info1)
 576                                       (git-fileinfo->name info2)))))
 577  (let ((info (pop infolist))
 578        (node (ewoc-nth status 0)))
 579    (while info
 580      (setf (git-fileinfo->needs-refresh info) t)
 581      (cond ((not node)
 582             (ewoc-enter-last status info)
 583             (setq info (pop infolist)))
 584            ((string-lessp (git-fileinfo->name (ewoc-data node))
 585                           (git-fileinfo->name info))
 586             (setq node (ewoc-next status node)))
 587            ((string-equal (git-fileinfo->name (ewoc-data node))
 588                           (git-fileinfo->name info))
 589              ;; preserve the marked flag
 590              (setf (git-fileinfo->marked info) (git-fileinfo->marked (ewoc-data node)))
 591              (setf (ewoc-data node) info)
 592              (setq info (pop infolist)))
 593            (t
 594             (ewoc-enter-before status node info)
 595             (setq info (pop infolist)))))))
 596
 597(defun git-run-diff-index (status files)
 598  "Run git-diff-index on FILES and parse the results into STATUS.
 599Return the list of files that haven't been handled."
 600  (let (infolist)
 601    (with-temp-buffer
 602      (apply #'git-call-process-env t nil "diff-index" "-z" "-M" "HEAD" "--" files)
 603      (goto-char (point-min))
 604      (while (re-search-forward
 605              ":\\([0-7]\\{6\\}\\) \\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} [0-9a-f]\\{40\\} \\(\\([ADMU]\\)\0\\([^\0]+\\)\\|\\([CR]\\)[0-9]*\0\\([^\0]+\\)\0\\([^\0]+\\)\\)\0"
 606              nil t 1)
 607        (let ((old-perm (string-to-number (match-string 1) 8))
 608              (new-perm (string-to-number (match-string 2) 8))
 609              (state (or (match-string 4) (match-string 6)))
 610              (name (or (match-string 5) (match-string 7)))
 611              (new-name (match-string 8)))
 612          (if new-name  ; copy or rename
 613              (if (eq ?C (string-to-char state))
 614                  (push (git-create-fileinfo 'added new-name old-perm new-perm 'copy name) infolist)
 615                (push (git-create-fileinfo 'deleted name 0 0 'rename new-name) infolist)
 616                (push (git-create-fileinfo 'added new-name old-perm new-perm 'rename name) infolist))
 617            (push (git-create-fileinfo (git-state-code state) name old-perm new-perm) infolist))
 618          (setq files (delete name files))
 619          (when new-name (setq files (delete new-name files))))))
 620    (git-insert-info-list status infolist)
 621    files))
 622
 623(defun git-find-status-file (status file)
 624  "Find a given file in the status ewoc and return its node."
 625  (let ((node (ewoc-nth status 0)))
 626    (while (and node (not (string= file (git-fileinfo->name (ewoc-data node)))))
 627      (setq node (ewoc-next status node)))
 628    node))
 629
 630(defun git-run-ls-files (status files default-state &rest options)
 631  "Run git-ls-files on FILES and parse the results into STATUS.
 632Return the list of files that haven't been handled."
 633  (let (infolist)
 634    (with-temp-buffer
 635      (apply #'git-call-process-env t nil "ls-files" "-z" (append options (list "--") files))
 636      (goto-char (point-min))
 637      (while (re-search-forward "\\([^\0]*\\)\0" nil t 1)
 638        (let ((name (match-string 1)))
 639          (push (git-create-fileinfo default-state name) infolist)
 640          (setq files (delete name files)))))
 641    (git-insert-info-list status infolist)
 642    files))
 643
 644(defun git-run-ls-unmerged (status files)
 645  "Run git-ls-files -u on FILES and parse the results into STATUS."
 646  (with-temp-buffer
 647    (apply #'git-call-process-env t nil "ls-files" "-z" "-u" "--" files)
 648    (goto-char (point-min))
 649    (let (unmerged-files)
 650      (while (re-search-forward "[0-7]\\{6\\} [0-9a-f]\\{40\\} [123]\t\\([^\0]+\\)\0" nil t)
 651        (push (match-string 1) unmerged-files))
 652      (git-set-filenames-state status unmerged-files 'unmerged))))
 653
 654(defun git-get-exclude-files ()
 655  "Get the list of exclude files to pass to git-ls-files."
 656  (let (files
 657        (config (git-config "core.excludesfile")))
 658    (when (file-readable-p ".git/info/exclude")
 659      (push ".git/info/exclude" files))
 660    (when (and config (file-readable-p config))
 661      (push config files))
 662    files))
 663
 664(defun git-run-ls-files-with-excludes (status files default-state &rest options)
 665  "Run git-ls-files on FILES with appropriate --exclude-from options."
 666  (let ((exclude-files (git-get-exclude-files)))
 667    (apply #'git-run-ls-files status files default-state
 668           (concat "--exclude-per-directory=" git-per-dir-ignore-file)
 669           (append options (mapcar (lambda (f) (concat "--exclude-from=" f)) exclude-files)))))
 670
 671(defun git-update-status-files (files &optional default-state)
 672  "Update the status of FILES from the index."
 673  (unless git-status (error "Not in git-status buffer."))
 674  (unless files
 675    (when git-show-uptodate (git-run-ls-files git-status nil 'uptodate "-c")))
 676  (let* ((remaining-files
 677          (if (git-empty-db-p) ; we need some special handling for an empty db
 678              (git-run-ls-files git-status files 'added "-c")
 679            (git-run-diff-index git-status files))))
 680    (git-run-ls-unmerged git-status files)
 681    (when (or remaining-files (and git-show-unknown (not files)))
 682      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'unknown "-o")))
 683    (when (or remaining-files (and git-show-ignored (not files)))
 684      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'ignored "-o" "-i")))
 685    (git-set-filenames-state git-status remaining-files default-state)
 686    (git-refresh-files)
 687    (git-refresh-ewoc-hf git-status)))
 688
 689(defun git-marked-files ()
 690  "Return a list of all marked files, or if none a list containing just the file at cursor position."
 691  (unless git-status (error "Not in git-status buffer."))
 692  (or (ewoc-collect git-status (lambda (info) (git-fileinfo->marked info)))
 693      (list (ewoc-data (ewoc-locate git-status)))))
 694
 695(defun git-marked-files-state (&rest states)
 696  "Return marked files that are in the specified states."
 697  (let ((files (git-marked-files))
 698        result)
 699    (dolist (info files)
 700      (when (memq (git-fileinfo->state info) states)
 701        (push info result)))
 702    result))
 703
 704(defun git-refresh-files ()
 705  "Refresh all files that need it and clear the needs-refresh flag."
 706  (unless git-status (error "Not in git-status buffer."))
 707  (ewoc-map
 708   (lambda (info)
 709     (let ((refresh (git-fileinfo->needs-refresh info)))
 710       (setf (git-fileinfo->needs-refresh info) nil)
 711       refresh))
 712   git-status)
 713  ; move back to goal column
 714  (when goal-column (move-to-column goal-column)))
 715
 716(defun git-refresh-ewoc-hf (status)
 717  "Refresh the ewoc header and footer."
 718  (let ((branch (git-symbolic-ref "HEAD"))
 719        (head (if (git-empty-db-p) "Nothing committed yet"
 720                (git-get-commit-description "HEAD")))
 721        (merge-heads (git-get-merge-heads)))
 722    (ewoc-set-hf status
 723                 (format "Directory:  %s\nBranch:     %s\nHead:       %s%s\n"
 724                         default-directory
 725                         (if branch
 726                             (if (string-match "^refs/heads/" branch)
 727                                 (substring branch (match-end 0))
 728                               branch)
 729                           "none (detached HEAD)")
 730                         head
 731                         (if merge-heads
 732                             (concat "\nMerging:    "
 733                                     (mapconcat (lambda (str) (git-get-commit-description str)) merge-heads "\n            "))
 734                           ""))
 735                 (if (ewoc-nth status 0) "" "    No changes."))))
 736
 737(defun git-get-filenames (files)
 738  (mapcar (lambda (info) (git-fileinfo->name info)) files))
 739
 740(defun git-update-index (index-file files)
 741  "Run git-update-index on a list of files."
 742  (let ((env (and index-file `(("GIT_INDEX_FILE" . ,index-file))))
 743        added deleted modified)
 744    (dolist (info files)
 745      (case (git-fileinfo->state info)
 746        ('added (push info added))
 747        ('deleted (push info deleted))
 748        ('modified (push info modified))))
 749    (when added
 750      (apply #'git-call-process-env nil env "update-index" "--add" "--" (git-get-filenames added)))
 751    (when deleted
 752      (apply #'git-call-process-env nil env "update-index" "--remove" "--" (git-get-filenames deleted)))
 753    (when modified
 754      (apply #'git-call-process-env nil env "update-index" "--" (git-get-filenames modified)))))
 755
 756(defun git-run-pre-commit-hook ()
 757  "Run the pre-commit hook if any."
 758  (unless git-status (error "Not in git-status buffer."))
 759  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
 760    (or (not files)
 761        (not (file-executable-p ".git/hooks/pre-commit"))
 762        (let ((index-file (make-temp-file "gitidx")))
 763          (unwind-protect
 764            (let ((head-tree (unless (git-empty-db-p) (git-rev-parse "HEAD^{tree}"))))
 765              (git-read-tree head-tree index-file)
 766              (git-update-index index-file files)
 767              (git-run-hook "pre-commit" `(("GIT_INDEX_FILE" . ,index-file))))
 768          (delete-file index-file))))))
 769
 770(defun git-do-commit ()
 771  "Perform the actual commit using the current buffer as log message."
 772  (interactive)
 773  (let ((buffer (current-buffer))
 774        (index-file (make-temp-file "gitidx")))
 775    (with-current-buffer log-edit-parent-buffer
 776      (if (git-marked-files-state 'unmerged)
 777          (message "You cannot commit unmerged files, resolve them first.")
 778        (unwind-protect
 779            (let ((files (git-marked-files-state 'added 'deleted 'modified))
 780                  head head-tree)
 781              (unless (git-empty-db-p)
 782                (setq head (git-rev-parse "HEAD")
 783                      head-tree (git-rev-parse "HEAD^{tree}")))
 784              (if files
 785                  (progn
 786                    (message "Running git commit...")
 787                    (git-read-tree head-tree index-file)
 788                    (git-update-index nil files)         ;update both the default index
 789                    (git-update-index index-file files)  ;and the temporary one
 790                    (let ((tree (git-write-tree index-file)))
 791                      (if (or (not (string-equal tree head-tree))
 792                              (yes-or-no-p "The tree was not modified, do you really want to perform an empty commit? "))
 793                          (let ((commit (git-commit-tree buffer tree head)))
 794                            (condition-case nil (delete-file ".git/MERGE_HEAD") (error nil))
 795                            (condition-case nil (delete-file ".git/MERGE_MSG") (error nil))
 796                            (with-current-buffer buffer (erase-buffer))
 797                            (dolist (info files) (git-set-fileinfo-state info 'uptodate))
 798                            (git-call-process-env nil nil "rerere")
 799                            (git-call-process-env nil nil "gc" "--auto")
 800                            (git-refresh-files)
 801                            (git-refresh-ewoc-hf git-status)
 802                            (message "Committed %s." commit)
 803                            (git-run-hook "post-commit" nil))
 804                        (message "Commit aborted."))))
 805                (message "No files to commit.")))
 806          (delete-file index-file))))))
 807
 808
 809;;;; Interactive functions
 810;;;; ------------------------------------------------------------
 811
 812(defun git-mark-file ()
 813  "Mark the file that the cursor is on and move to the next one."
 814  (interactive)
 815  (unless git-status (error "Not in git-status buffer."))
 816  (let* ((pos (ewoc-locate git-status))
 817         (info (ewoc-data pos)))
 818    (setf (git-fileinfo->marked info) t)
 819    (ewoc-invalidate git-status pos)
 820    (ewoc-goto-next git-status 1)))
 821
 822(defun git-unmark-file ()
 823  "Unmark the file that the cursor is on and move to the next one."
 824  (interactive)
 825  (unless git-status (error "Not in git-status buffer."))
 826  (let* ((pos (ewoc-locate git-status))
 827         (info (ewoc-data pos)))
 828    (setf (git-fileinfo->marked info) nil)
 829    (ewoc-invalidate git-status pos)
 830    (ewoc-goto-next git-status 1)))
 831
 832(defun git-unmark-file-up ()
 833  "Unmark the file that the cursor is on and move to the previous one."
 834  (interactive)
 835  (unless git-status (error "Not in git-status buffer."))
 836  (let* ((pos (ewoc-locate git-status))
 837         (info (ewoc-data pos)))
 838    (setf (git-fileinfo->marked info) nil)
 839    (ewoc-invalidate git-status pos)
 840    (ewoc-goto-prev git-status 1)))
 841
 842(defun git-mark-all ()
 843  "Mark all files."
 844  (interactive)
 845  (unless git-status (error "Not in git-status buffer."))
 846  (ewoc-map (lambda (info) (unless (git-fileinfo->marked info)
 847                             (setf (git-fileinfo->marked info) t))) git-status)
 848  ; move back to goal column after invalidate
 849  (when goal-column (move-to-column goal-column)))
 850
 851(defun git-unmark-all ()
 852  "Unmark all files."
 853  (interactive)
 854  (unless git-status (error "Not in git-status buffer."))
 855  (ewoc-map (lambda (info) (when (git-fileinfo->marked info)
 856                             (setf (git-fileinfo->marked info) nil)
 857                             t)) git-status)
 858  ; move back to goal column after invalidate
 859  (when goal-column (move-to-column goal-column)))
 860
 861(defun git-toggle-all-marks ()
 862  "Toggle all file marks."
 863  (interactive)
 864  (unless git-status (error "Not in git-status buffer."))
 865  (ewoc-map (lambda (info) (setf (git-fileinfo->marked info) (not (git-fileinfo->marked info))) t) git-status)
 866  ; move back to goal column after invalidate
 867  (when goal-column (move-to-column goal-column)))
 868
 869(defun git-next-file (&optional n)
 870  "Move the selection down N files."
 871  (interactive "p")
 872  (unless git-status (error "Not in git-status buffer."))
 873  (ewoc-goto-next git-status n))
 874
 875(defun git-prev-file (&optional n)
 876  "Move the selection up N files."
 877  (interactive "p")
 878  (unless git-status (error "Not in git-status buffer."))
 879  (ewoc-goto-prev git-status n))
 880
 881(defun git-next-unmerged-file (&optional n)
 882  "Move the selection down N unmerged files."
 883  (interactive "p")
 884  (unless git-status (error "Not in git-status buffer."))
 885  (let* ((last (ewoc-locate git-status))
 886         (node (ewoc-next git-status last)))
 887    (while (and node (> n 0))
 888      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 889        (setq n (1- n))
 890        (setq last node))
 891      (setq node (ewoc-next git-status node)))
 892    (ewoc-goto-node git-status last)))
 893
 894(defun git-prev-unmerged-file (&optional n)
 895  "Move the selection up N unmerged files."
 896  (interactive "p")
 897  (unless git-status (error "Not in git-status buffer."))
 898  (let* ((last (ewoc-locate git-status))
 899         (node (ewoc-prev git-status last)))
 900    (while (and node (> n 0))
 901      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 902        (setq n (1- n))
 903        (setq last node))
 904      (setq node (ewoc-prev git-status node)))
 905    (ewoc-goto-node git-status last)))
 906
 907(defun git-add-file ()
 908  "Add marked file(s) to the index cache."
 909  (interactive)
 910  (let ((files (git-get-filenames (git-marked-files-state 'unknown 'ignored))))
 911    (unless files
 912      (push (file-relative-name (read-file-name "File to add: " nil nil t)) files))
 913    (apply #'git-call-process-env nil nil "update-index" "--add" "--" files)
 914    (git-update-status-files files 'uptodate)
 915    (git-success-message "Added" files)))
 916
 917(defun git-ignore-file ()
 918  "Add marked file(s) to the ignore list."
 919  (interactive)
 920  (let ((files (git-get-filenames (git-marked-files-state 'unknown))))
 921    (unless files
 922      (push (file-relative-name (read-file-name "File to ignore: " nil nil t)) files))
 923    (dolist (f files) (git-append-to-ignore f))
 924    (git-update-status-files files 'ignored)
 925    (git-success-message "Ignored" files)))
 926
 927(defun git-remove-file ()
 928  "Remove the marked file(s)."
 929  (interactive)
 930  (let ((files (git-get-filenames (git-marked-files-state 'added 'modified 'unknown 'uptodate 'ignored))))
 931    (unless files
 932      (push (file-relative-name (read-file-name "File to remove: " nil nil t)) files))
 933    (if (yes-or-no-p
 934         (format "Remove %d file%s? " (length files) (if (> (length files) 1) "s" "")))
 935        (progn
 936          (dolist (name files)
 937            (when (file-exists-p name) (delete-file name)))
 938          (apply #'git-call-process-env nil nil "update-index" "--remove" "--" files)
 939          (git-update-status-files files nil)
 940          (git-success-message "Removed" files))
 941      (message "Aborting"))))
 942
 943(defun git-revert-file ()
 944  "Revert changes to the marked file(s)."
 945  (interactive)
 946  (let ((files (git-marked-files))
 947        added modified)
 948    (when (and files
 949               (yes-or-no-p
 950                (format "Revert %d file%s? " (length files) (if (> (length files) 1) "s" ""))))
 951      (dolist (info files)
 952        (case (git-fileinfo->state info)
 953          ('added (push (git-fileinfo->name info) added))
 954          ('deleted (push (git-fileinfo->name info) modified))
 955          ('unmerged (push (git-fileinfo->name info) modified))
 956          ('modified (push (git-fileinfo->name info) modified))))
 957      (when added
 958        (apply #'git-call-process-env nil nil "update-index" "--force-remove" "--" added))
 959      (when modified
 960        (apply #'git-call-process-env nil nil "checkout" "HEAD" modified))
 961      (git-update-status-files (append added modified) 'uptodate)
 962      (git-success-message "Reverted" (git-get-filenames files)))))
 963
 964(defun git-resolve-file ()
 965  "Resolve conflicts in marked file(s)."
 966  (interactive)
 967  (let ((files (git-get-filenames (git-marked-files-state 'unmerged))))
 968    (when files
 969      (apply #'git-call-process-env nil nil "update-index" "--" files)
 970      (git-update-status-files files 'uptodate)
 971      (git-success-message "Resolved" files))))
 972
 973(defun git-remove-handled ()
 974  "Remove handled files from the status list."
 975  (interactive)
 976  (ewoc-filter git-status
 977               (lambda (info)
 978                 (case (git-fileinfo->state info)
 979                   ('ignored git-show-ignored)
 980                   ('uptodate git-show-uptodate)
 981                   ('unknown git-show-unknown)
 982                   (t t))))
 983  (unless (ewoc-nth git-status 0)  ; refresh header if list is empty
 984    (git-refresh-ewoc-hf git-status)))
 985
 986(defun git-toggle-show-uptodate ()
 987  "Toogle the option for showing up-to-date files."
 988  (interactive)
 989  (if (setq git-show-uptodate (not git-show-uptodate))
 990      (git-refresh-status)
 991    (git-remove-handled)))
 992
 993(defun git-toggle-show-ignored ()
 994  "Toogle the option for showing ignored files."
 995  (interactive)
 996  (if (setq git-show-ignored (not git-show-ignored))
 997      (progn
 998        (message "Inserting ignored files...")
 999        (git-run-ls-files-with-excludes git-status nil 'ignored "-o" "-i")
1000        (git-refresh-files)
1001        (git-refresh-ewoc-hf git-status)
1002        (message "Inserting ignored files...done"))
1003    (git-remove-handled)))
1004
1005(defun git-toggle-show-unknown ()
1006  "Toogle the option for showing unknown files."
1007  (interactive)
1008  (if (setq git-show-unknown (not git-show-unknown))
1009      (progn
1010        (message "Inserting unknown files...")
1011        (git-run-ls-files-with-excludes git-status nil 'unknown "-o")
1012        (git-refresh-files)
1013        (git-refresh-ewoc-hf git-status)
1014        (message "Inserting unknown files...done"))
1015    (git-remove-handled)))
1016
1017(defun git-setup-diff-buffer (buffer)
1018  "Setup a buffer for displaying a diff."
1019  (let ((dir default-directory))
1020    (with-current-buffer buffer
1021      (diff-mode)
1022      (goto-char (point-min))
1023      (setq default-directory dir)
1024      (setq buffer-read-only t)))
1025  (display-buffer buffer)
1026  (shrink-window-if-larger-than-buffer))
1027
1028(defun git-diff-file ()
1029  "Diff the marked file(s) against HEAD."
1030  (interactive)
1031  (let ((files (git-marked-files)))
1032    (git-setup-diff-buffer
1033     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M" "HEAD" "--" (git-get-filenames files)))))
1034
1035(defun git-diff-file-merge-head (arg)
1036  "Diff the marked file(s) against the first merge head (or the nth one with a numeric prefix)."
1037  (interactive "p")
1038  (let ((files (git-marked-files))
1039        (merge-heads (git-get-merge-heads)))
1040    (unless merge-heads (error "No merge in progress"))
1041    (git-setup-diff-buffer
1042     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M"
1043            (or (nth (1- arg) merge-heads) "HEAD") "--" (git-get-filenames files)))))
1044
1045(defun git-diff-unmerged-file (stage)
1046  "Diff the marked unmerged file(s) against the specified stage."
1047  (let ((files (git-marked-files)))
1048    (git-setup-diff-buffer
1049     (apply #'git-run-command-buffer "*git-diff*" "diff-files" "-p" stage "--" (git-get-filenames files)))))
1050
1051(defun git-diff-file-base ()
1052  "Diff the marked unmerged file(s) against the common base file."
1053  (interactive)
1054  (git-diff-unmerged-file "-1"))
1055
1056(defun git-diff-file-mine ()
1057  "Diff the marked unmerged file(s) against my pre-merge version."
1058  (interactive)
1059  (git-diff-unmerged-file "-2"))
1060
1061(defun git-diff-file-other ()
1062  "Diff the marked unmerged file(s) against the other's pre-merge version."
1063  (interactive)
1064  (git-diff-unmerged-file "-3"))
1065
1066(defun git-diff-file-combined ()
1067  "Do a combined diff of the marked unmerged file(s)."
1068  (interactive)
1069  (git-diff-unmerged-file "-c"))
1070
1071(defun git-diff-file-idiff ()
1072  "Perform an interactive diff on the current file."
1073  (interactive)
1074  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
1075    (unless (eq 1 (length files))
1076      (error "Cannot perform an interactive diff on multiple files."))
1077    (let* ((filename (car (git-get-filenames files)))
1078           (buff1 (find-file-noselect filename))
1079           (buff2 (git-run-command-buffer (concat filename ".~HEAD~") "cat-file" "blob" (concat "HEAD:" filename))))
1080      (ediff-buffers buff1 buff2))))
1081
1082(defun git-log-file ()
1083  "Display a log of changes to the marked file(s)."
1084  (interactive)
1085  (let* ((files (git-marked-files))
1086         (coding-system-for-read git-commits-coding-system)
1087         (buffer (apply #'git-run-command-buffer "*git-log*" "rev-list" "--pretty" "HEAD" "--" (git-get-filenames files))))
1088    (with-current-buffer buffer
1089      ; (git-log-mode)  FIXME: implement log mode
1090      (goto-char (point-min))
1091      (setq buffer-read-only t))
1092    (display-buffer buffer)))
1093
1094(defun git-log-edit-files ()
1095  "Return a list of marked files for use in the log-edit buffer."
1096  (with-current-buffer log-edit-parent-buffer
1097    (git-get-filenames (git-marked-files-state 'added 'deleted 'modified))))
1098
1099(defun git-append-sign-off (name email)
1100  "Append a Signed-off-by entry to the current buffer, avoiding duplicates."
1101  (let ((sign-off (format "Signed-off-by: %s <%s>" name email))
1102        (case-fold-search t))
1103    (goto-char (point-min))
1104    (unless (re-search-forward (concat "^" (regexp-quote sign-off)) nil t)
1105      (goto-char (point-min))
1106      (unless (re-search-forward "^Signed-off-by: " nil t)
1107        (setq sign-off (concat "\n" sign-off)))
1108      (goto-char (point-max))
1109      (insert sign-off "\n"))))
1110
1111(defun git-setup-log-buffer (buffer &optional author-name author-email subject date msg)
1112  "Setup the log buffer for a commit."
1113  (unless git-status (error "Not in git-status buffer."))
1114  (let ((merge-heads (git-get-merge-heads))
1115        (dir default-directory)
1116        (committer-name (git-get-committer-name))
1117        (committer-email (git-get-committer-email))
1118        (sign-off git-append-signed-off-by))
1119    (with-current-buffer buffer
1120      (cd dir)
1121      (erase-buffer)
1122      (insert
1123       (propertize
1124        (format "Author: %s <%s>\n%s%s"
1125                (or author-name committer-name)
1126                (or author-email committer-email)
1127                (if date (format "Date: %s\n" date) "")
1128                (if merge-heads
1129                    (format "Parent: %s\n%s\n"
1130                            (git-rev-parse "HEAD")
1131                            (mapconcat (lambda (str) (concat "Parent: " str)) merge-heads "\n"))
1132                  ""))
1133        'face 'git-header-face)
1134       (propertize git-log-msg-separator 'face 'git-separator-face)
1135       "\n")
1136      (when subject (insert subject "\n\n"))
1137      (cond (msg (insert msg "\n"))
1138            ((file-readable-p ".dotest/msg")
1139             (insert-file-contents ".dotest/msg"))
1140            ((file-readable-p ".git/MERGE_MSG")
1141             (insert-file-contents ".git/MERGE_MSG")))
1142      ; delete empty lines at end
1143      (goto-char (point-min))
1144      (when (re-search-forward "\n+\\'" nil t)
1145        (replace-match "\n" t t))
1146      (when sign-off (git-append-sign-off committer-name committer-email)))))
1147
1148(defun git-commit-file ()
1149  "Commit the marked file(s), asking for a commit message."
1150  (interactive)
1151  (unless git-status (error "Not in git-status buffer."))
1152  (when (git-run-pre-commit-hook)
1153    (let ((buffer (get-buffer-create "*git-commit*"))
1154          (coding-system (git-get-commits-coding-system))
1155          author-name author-email subject date)
1156      (when (eq 0 (buffer-size buffer))
1157        (when (file-readable-p ".dotest/info")
1158          (with-temp-buffer
1159            (insert-file-contents ".dotest/info")
1160            (goto-char (point-min))
1161            (when (re-search-forward "^Author: \\(.*\\)\nEmail: \\(.*\\)$" nil t)
1162              (setq author-name (match-string 1))
1163              (setq author-email (match-string 2)))
1164            (goto-char (point-min))
1165            (when (re-search-forward "^Subject: \\(.*\\)$" nil t)
1166              (setq subject (match-string 1)))
1167            (goto-char (point-min))
1168            (when (re-search-forward "^Date: \\(.*\\)$" nil t)
1169              (setq date (match-string 1)))))
1170        (git-setup-log-buffer buffer author-name author-email subject date))
1171      (log-edit #'git-do-commit nil #'git-log-edit-files buffer)
1172      (setq font-lock-keywords (font-lock-compile-keywords git-log-edit-font-lock-keywords))
1173      (setq buffer-file-coding-system coding-system)
1174      (re-search-forward (regexp-quote (concat git-log-msg-separator "\n")) nil t))))
1175
1176(defun git-find-file ()
1177  "Visit the current file in its own buffer."
1178  (interactive)
1179  (unless git-status (error "Not in git-status buffer."))
1180  (let ((info (ewoc-data (ewoc-locate git-status))))
1181    (find-file (git-fileinfo->name info))
1182    (when (eq 'unmerged (git-fileinfo->state info))
1183      (smerge-mode 1))))
1184
1185(defun git-find-file-other-window ()
1186  "Visit the current file in its own buffer in another window."
1187  (interactive)
1188  (unless git-status (error "Not in git-status buffer."))
1189  (let ((info (ewoc-data (ewoc-locate git-status))))
1190    (find-file-other-window (git-fileinfo->name info))
1191    (when (eq 'unmerged (git-fileinfo->state info))
1192      (smerge-mode))))
1193
1194(defun git-find-file-imerge ()
1195  "Visit the current file in interactive merge mode."
1196  (interactive)
1197  (unless git-status (error "Not in git-status buffer."))
1198  (let ((info (ewoc-data (ewoc-locate git-status))))
1199    (find-file (git-fileinfo->name info))
1200    (smerge-ediff)))
1201
1202(defun git-view-file ()
1203  "View the current file in its own buffer."
1204  (interactive)
1205  (unless git-status (error "Not in git-status buffer."))
1206  (let ((info (ewoc-data (ewoc-locate git-status))))
1207    (view-file (git-fileinfo->name info))))
1208
1209(defun git-refresh-status ()
1210  "Refresh the git status buffer."
1211  (interactive)
1212  (let* ((status git-status)
1213         (pos (ewoc-locate status))
1214         (marked-files (git-get-filenames (ewoc-collect status (lambda (info) (git-fileinfo->marked info)))))
1215         (cur-name (and pos (git-fileinfo->name (ewoc-data pos)))))
1216    (unless status (error "Not in git-status buffer."))
1217    (message "Refreshing git status...")
1218    (git-call-process-env nil nil "update-index" "--refresh")
1219    (git-clear-status status)
1220    (git-update-status-files nil)
1221    ; restore file marks
1222    (when marked-files
1223      (git-status-filenames-map status
1224                                (lambda (info)
1225                                        (setf (git-fileinfo->marked info) t)
1226                                        (setf (git-fileinfo->needs-refresh info) t))
1227                                marked-files)
1228      (git-refresh-files))
1229    ; move point to the current file name if any
1230    (message "Refreshing git status...done")
1231    (let ((node (and cur-name (git-find-status-file status cur-name))))
1232      (when node (ewoc-goto-node status node)))))
1233
1234(defun git-status-quit ()
1235  "Quit git-status mode."
1236  (interactive)
1237  (bury-buffer))
1238
1239;;;; Major Mode
1240;;;; ------------------------------------------------------------
1241
1242(defvar git-status-mode-hook nil
1243  "Run after `git-status-mode' is setup.")
1244
1245(defvar git-status-mode-map nil
1246  "Keymap for git major mode.")
1247
1248(defvar git-status nil
1249  "List of all files managed by the git-status mode.")
1250
1251(unless git-status-mode-map
1252  (let ((map (make-keymap))
1253        (diff-map (make-sparse-keymap))
1254        (toggle-map (make-sparse-keymap)))
1255    (suppress-keymap map)
1256    (define-key map "?"   'git-help)
1257    (define-key map "h"   'git-help)
1258    (define-key map " "   'git-next-file)
1259    (define-key map "a"   'git-add-file)
1260    (define-key map "c"   'git-commit-file)
1261    (define-key map "d"    diff-map)
1262    (define-key map "="   'git-diff-file)
1263    (define-key map "f"   'git-find-file)
1264    (define-key map "\r"  'git-find-file)
1265    (define-key map "g"   'git-refresh-status)
1266    (define-key map "i"   'git-ignore-file)
1267    (define-key map "l"   'git-log-file)
1268    (define-key map "m"   'git-mark-file)
1269    (define-key map "M"   'git-mark-all)
1270    (define-key map "n"   'git-next-file)
1271    (define-key map "N"   'git-next-unmerged-file)
1272    (define-key map "o"   'git-find-file-other-window)
1273    (define-key map "p"   'git-prev-file)
1274    (define-key map "P"   'git-prev-unmerged-file)
1275    (define-key map "q"   'git-status-quit)
1276    (define-key map "r"   'git-remove-file)
1277    (define-key map "R"   'git-resolve-file)
1278    (define-key map "t"    toggle-map)
1279    (define-key map "T"   'git-toggle-all-marks)
1280    (define-key map "u"   'git-unmark-file)
1281    (define-key map "U"   'git-revert-file)
1282    (define-key map "v"   'git-view-file)
1283    (define-key map "x"   'git-remove-handled)
1284    (define-key map "\C-?" 'git-unmark-file-up)
1285    (define-key map "\M-\C-?" 'git-unmark-all)
1286    ; the diff submap
1287    (define-key diff-map "b" 'git-diff-file-base)
1288    (define-key diff-map "c" 'git-diff-file-combined)
1289    (define-key diff-map "=" 'git-diff-file)
1290    (define-key diff-map "e" 'git-diff-file-idiff)
1291    (define-key diff-map "E" 'git-find-file-imerge)
1292    (define-key diff-map "h" 'git-diff-file-merge-head)
1293    (define-key diff-map "m" 'git-diff-file-mine)
1294    (define-key diff-map "o" 'git-diff-file-other)
1295    ; the toggle submap
1296    (define-key toggle-map "u" 'git-toggle-show-uptodate)
1297    (define-key toggle-map "i" 'git-toggle-show-ignored)
1298    (define-key toggle-map "k" 'git-toggle-show-unknown)
1299    (define-key toggle-map "m" 'git-toggle-all-marks)
1300    (setq git-status-mode-map map)))
1301
1302;; git mode should only run in the *git status* buffer
1303(put 'git-status-mode 'mode-class 'special)
1304
1305(defun git-status-mode ()
1306  "Major mode for interacting with Git.
1307Commands:
1308\\{git-status-mode-map}"
1309  (kill-all-local-variables)
1310  (buffer-disable-undo)
1311  (setq mode-name "git status"
1312        major-mode 'git-status-mode
1313        goal-column 17
1314        buffer-read-only t)
1315  (use-local-map git-status-mode-map)
1316  (let ((buffer-read-only nil))
1317    (erase-buffer)
1318  (let ((status (ewoc-create 'git-fileinfo-prettyprint "" "")))
1319    (set (make-local-variable 'git-status) status))
1320  (set (make-local-variable 'list-buffers-directory) default-directory)
1321  (make-local-variable 'git-show-uptodate)
1322  (make-local-variable 'git-show-ignored)
1323  (make-local-variable 'git-show-unknown)
1324  (run-hooks 'git-status-mode-hook)))
1325
1326(defun git-find-status-buffer (dir)
1327  "Find the git status buffer handling a specified directory."
1328  (let ((list (buffer-list))
1329        (fulldir (expand-file-name dir))
1330        found)
1331    (while (and list (not found))
1332      (let ((buffer (car list)))
1333        (with-current-buffer buffer
1334          (when (and list-buffers-directory
1335                     (string-equal fulldir (expand-file-name list-buffers-directory))
1336                     (string-match "\\*git-status\\*$" (buffer-name buffer)))
1337            (setq found buffer))))
1338      (setq list (cdr list)))
1339    found))
1340
1341(defun git-status (dir)
1342  "Entry point into git-status mode."
1343  (interactive "DSelect directory: ")
1344  (setq dir (git-get-top-dir dir))
1345  (if (file-directory-p (concat (file-name-as-directory dir) ".git"))
1346      (let ((buffer (or (and git-reuse-status-buffer (git-find-status-buffer dir))
1347                        (create-file-buffer (expand-file-name "*git-status*" dir)))))
1348        (switch-to-buffer buffer)
1349        (cd dir)
1350        (git-status-mode)
1351        (git-refresh-status)
1352        (goto-char (point-min))
1353        (add-hook 'after-save-hook 'git-update-saved-file))
1354    (message "%s is not a git working tree." dir)))
1355
1356(defun git-update-saved-file ()
1357  "Update the corresponding git-status buffer when a file is saved.
1358Meant to be used in `after-save-hook'."
1359  (let* ((file (expand-file-name buffer-file-name))
1360         (dir (condition-case nil (git-get-top-dir (file-name-directory file)) (error nil)))
1361         (buffer (and dir (git-find-status-buffer dir))))
1362    (when buffer
1363      (with-current-buffer buffer
1364        (let ((filename (file-relative-name file dir)))
1365          ; skip files located inside the .git directory
1366          (unless (string-match "^\\.git/" filename)
1367            (git-call-process-env nil nil "add" "--refresh" "--" filename)
1368            (git-update-status-files (list filename) 'uptodate)))))))
1369
1370(defun git-help ()
1371  "Display help for Git mode."
1372  (interactive)
1373  (describe-function 'git-status-mode))
1374
1375(provide 'git)
1376;;; git.el ends here