Andrew's git - gitweb.git/blob - contrib/emacs/git.el

   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(require 'easymenu)
  53
  54
  55;;;; Customizations
  56;;;; ------------------------------------------------------------
  57
  58(defgroup git nil
  59  "A user interface for the git versioning system."
  60  :group 'tools)
  61
  62(defcustom git-committer-name nil
  63  "User name to use for commits.
  64The default is to fall back to the repository config,
  65then to `add-log-full-name' and then to `user-full-name'."
  66  :group 'git
  67  :type '(choice (const :tag "Default" nil)
  68                 (string :tag "Name")))
  69
  70(defcustom git-committer-email nil
  71  "Email address to use for commits.
  72The default is to fall back to the git repository config,
  73then to `add-log-mailing-address' and then to `user-mail-address'."
  74  :group 'git
  75  :type '(choice (const :tag "Default" nil)
  76                 (string :tag "Email")))
  77
  78(defcustom git-commits-coding-system nil
  79  "Default coding system for the log message of git commits."
  80  :group 'git
  81  :type '(choice (const :tag "From repository config" nil)
  82                 (coding-system)))
  83
  84(defcustom git-append-signed-off-by nil
  85  "Whether to append a Signed-off-by line to the commit message before editing."
  86  :group 'git
  87  :type 'boolean)
  88
  89(defcustom git-reuse-status-buffer t
  90  "Whether `git-status' should try to reuse an existing buffer
  91if there is already one that displays the same directory."
  92  :group 'git
  93  :type 'boolean)
  94
  95(defcustom git-per-dir-ignore-file ".gitignore"
  96  "Name of the per-directory ignore file."
  97  :group 'git
  98  :type 'string)
  99
 100(defcustom git-show-uptodate nil
 101  "Whether to display up-to-date files."
 102  :group 'git
 103  :type 'boolean)
 104
 105(defcustom git-show-ignored nil
 106  "Whether to display ignored files."
 107  :group 'git
 108  :type 'boolean)
 109
 110(defcustom git-show-unknown t
 111  "Whether to display unknown files."
 112  :group 'git
 113  :type 'boolean)
 114
 115
 116(defface git-status-face
 117  '((((class color) (background light)) (:foreground "purple"))
 118    (((class color) (background dark)) (:foreground "salmon")))
 119  "Git mode face used to highlight added and modified files."
 120  :group 'git)
 121
 122(defface git-unmerged-face
 123  '((((class color) (background light)) (:foreground "red" :bold t))
 124    (((class color) (background dark)) (:foreground "red" :bold t)))
 125  "Git mode face used to highlight unmerged files."
 126  :group 'git)
 127
 128(defface git-unknown-face
 129  '((((class color) (background light)) (:foreground "goldenrod" :bold t))
 130    (((class color) (background dark)) (:foreground "goldenrod" :bold t)))
 131  "Git mode face used to highlight unknown files."
 132  :group 'git)
 133
 134(defface git-uptodate-face
 135  '((((class color) (background light)) (:foreground "grey60"))
 136    (((class color) (background dark)) (:foreground "grey40")))
 137  "Git mode face used to highlight up-to-date files."
 138  :group 'git)
 139
 140(defface git-ignored-face
 141  '((((class color) (background light)) (:foreground "grey60"))
 142    (((class color) (background dark)) (:foreground "grey40")))
 143  "Git mode face used to highlight ignored files."
 144  :group 'git)
 145
 146(defface git-mark-face
 147  '((((class color) (background light)) (:foreground "red" :bold t))
 148    (((class color) (background dark)) (:foreground "tomato" :bold t)))
 149  "Git mode face used for the file marks."
 150  :group 'git)
 151
 152(defface git-header-face
 153  '((((class color) (background light)) (:foreground "blue"))
 154    (((class color) (background dark)) (:foreground "blue")))
 155  "Git mode face used for commit headers."
 156  :group 'git)
 157
 158(defface git-separator-face
 159  '((((class color) (background light)) (:foreground "brown"))
 160    (((class color) (background dark)) (:foreground "brown")))
 161  "Git mode face used for commit separator."
 162  :group 'git)
 163
 164(defface git-permission-face
 165  '((((class color) (background light)) (:foreground "green" :bold t))
 166    (((class color) (background dark)) (:foreground "green" :bold t)))
 167  "Git mode face used for permission changes."
 168  :group 'git)
 169
 170
 171;;;; Utilities
 172;;;; ------------------------------------------------------------
 173
 174(defconst git-log-msg-separator "--- log message follows this line ---")
 175
 176(defvar git-log-edit-font-lock-keywords
 177  `(("^\\(Author:\\|Date:\\|Parent:\\|Signed-off-by:\\)\\(.*\\)$"
 178     (1 font-lock-keyword-face)
 179     (2 font-lock-function-name-face))
 180    (,(concat "^\\(" (regexp-quote git-log-msg-separator) "\\)$")
 181     (1 font-lock-comment-face))))
 182
 183(defun git-get-env-strings (env)
 184  "Build a list of NAME=VALUE strings from a list of environment strings."
 185  (mapcar (lambda (entry) (concat (car entry) "=" (cdr entry))) env))
 186
 187(defun git-call-process-env (buffer env &rest args)
 188  "Wrapper for call-process that sets environment strings."
 189  (if env
 190      (apply #'call-process "env" nil buffer nil
 191             (append (git-get-env-strings env) (list "git") args))
 192    (apply #'call-process "git" nil buffer nil args)))
 193
 194(defun git-call-process-env-string (env &rest args)
 195  "Wrapper for call-process that sets environment strings,
 196and returns the process output as a string."
 197  (with-temp-buffer
 198    (and (eq 0 (apply #' git-call-process-env t env args))
 199         (buffer-string))))
 200
 201(defun git-run-process-region (buffer start end program args)
 202  "Run a git process with a buffer region as input."
 203  (let ((output-buffer (current-buffer))
 204        (dir default-directory))
 205    (with-current-buffer buffer
 206      (cd dir)
 207      (apply #'call-process-region start end program
 208             nil (list output-buffer nil) nil args))))
 209
 210(defun git-run-command-buffer (buffer-name &rest args)
 211  "Run a git command, sending the output to a buffer named BUFFER-NAME."
 212  (let ((dir default-directory)
 213        (buffer (get-buffer-create buffer-name)))
 214    (message "Running git %s..." (car args))
 215    (with-current-buffer buffer
 216      (let ((default-directory dir)
 217            (buffer-read-only nil))
 218        (erase-buffer)
 219        (apply #'git-call-process-env buffer nil args)))
 220    (message "Running git %s...done" (car args))
 221    buffer))
 222
 223(defun git-run-command-region (buffer start end env &rest args)
 224  "Run a git command with specified buffer region as input."
 225  (unless (eq 0 (if env
 226                    (git-run-process-region
 227                     buffer start end "env"
 228                     (append (git-get-env-strings env) (list "git") args))
 229                  (git-run-process-region
 230                   buffer start end "git" args)))
 231    (error "Failed to run \"git %s\":\n%s" (mapconcat (lambda (x) x) args " ") (buffer-string))))
 232
 233(defun git-run-hook (hook env &rest args)
 234  "Run a git hook and display its output if any."
 235  (let ((dir default-directory)
 236        (hook-name (expand-file-name (concat ".git/hooks/" hook))))
 237    (or (not (file-executable-p hook-name))
 238        (let (status (buffer (get-buffer-create "*Git Hook Output*")))
 239          (with-current-buffer buffer
 240            (erase-buffer)
 241            (cd dir)
 242            (setq status
 243                  (if env
 244                      (apply #'call-process "env" nil (list buffer t) nil
 245                             (append (git-get-env-strings env) (list hook-name) args))
 246                    (apply #'call-process hook-name nil (list buffer t) nil args))))
 247          (display-message-or-buffer buffer)
 248          (eq 0 status)))))
 249
 250(defun git-get-string-sha1 (string)
 251  "Read a SHA1 from the specified string."
 252  (and string
 253       (string-match "[0-9a-f]\\{40\\}" string)
 254       (match-string 0 string)))
 255
 256(defun git-get-committer-name ()
 257  "Return the name to use as GIT_COMMITTER_NAME."
 258  ; copied from log-edit
 259  (or git-committer-name
 260      (git-config "user.name")
 261      (and (boundp 'add-log-full-name) add-log-full-name)
 262      (and (fboundp 'user-full-name) (user-full-name))
 263      (and (boundp 'user-full-name) user-full-name)))
 264
 265(defun git-get-committer-email ()
 266  "Return the email address to use as GIT_COMMITTER_EMAIL."
 267  ; copied from log-edit
 268  (or git-committer-email
 269      (git-config "user.email")
 270      (and (boundp 'add-log-mailing-address) add-log-mailing-address)
 271      (and (fboundp 'user-mail-address) (user-mail-address))
 272      (and (boundp 'user-mail-address) user-mail-address)))
 273
 274(defun git-get-commits-coding-system ()
 275  "Return the coding system to use for commits."
 276  (let ((repo-config (git-config "i18n.commitencoding")))
 277    (or git-commits-coding-system
 278        (and repo-config
 279             (fboundp 'locale-charset-to-coding-system)
 280             (locale-charset-to-coding-system repo-config))
 281      'utf-8)))
 282
 283(defun git-get-logoutput-coding-system ()
 284  "Return the coding system used for git-log output."
 285  (let ((repo-config (or (git-config "i18n.logoutputencoding")
 286                         (git-config "i18n.commitencoding"))))
 287    (or git-commits-coding-system
 288        (and repo-config
 289             (fboundp 'locale-charset-to-coding-system)
 290             (locale-charset-to-coding-system repo-config))
 291      'utf-8)))
 292
 293(defun git-escape-file-name (name)
 294  "Escape a file name if necessary."
 295  (if (string-match "[\n\t\"\\]" name)
 296      (concat "\""
 297              (mapconcat (lambda (c)
 298                   (case c
 299                     (?\n "\\n")
 300                     (?\t "\\t")
 301                     (?\\ "\\\\")
 302                     (?\" "\\\"")
 303                     (t (char-to-string c))))
 304                 name "")
 305              "\"")
 306    name))
 307
 308(defun git-success-message (text files)
 309  "Print a success message after having handled FILES."
 310  (let ((n (length files)))
 311    (if (equal n 1)
 312        (message "%s %s" text (car files))
 313      (message "%s %d files" text n))))
 314
 315(defun git-get-top-dir (dir)
 316  "Retrieve the top-level directory of a git tree."
 317  (let ((cdup (with-output-to-string
 318                (with-current-buffer standard-output
 319                  (cd dir)
 320                  (unless (eq 0 (call-process "git" nil t nil "rev-parse" "--show-cdup"))
 321                    (error "cannot find top-level git tree for %s." dir))))))
 322    (expand-file-name (concat (file-name-as-directory dir)
 323                              (car (split-string cdup "\n"))))))
 324
 325;stolen from pcl-cvs
 326(defun git-append-to-ignore (file)
 327  "Add a file name to the ignore file in its directory."
 328  (let* ((fullname (expand-file-name file))
 329         (dir (file-name-directory fullname))
 330         (name (file-name-nondirectory fullname))
 331         (ignore-name (expand-file-name git-per-dir-ignore-file dir))
 332         (created (not (file-exists-p ignore-name))))
 333  (save-window-excursion
 334    (set-buffer (find-file-noselect ignore-name))
 335    (goto-char (point-max))
 336    (unless (zerop (current-column)) (insert "\n"))
 337    (insert "/" name "\n")
 338    (sort-lines nil (point-min) (point-max))
 339    (save-buffer))
 340  (when created
 341    (git-call-process-env nil nil "update-index" "--add" "--" (file-relative-name ignore-name)))
 342  (git-update-status-files (list (file-relative-name ignore-name)) 'unknown)))
 343
 344; propertize definition for XEmacs, stolen from erc-compat
 345(eval-when-compile
 346  (unless (fboundp 'propertize)
 347    (defun propertize (string &rest props)
 348      (let ((string (copy-sequence string)))
 349        (while props
 350          (put-text-property 0 (length string) (nth 0 props) (nth 1 props) string)
 351          (setq props (cddr props)))
 352        string))))
 353
 354;;;; Wrappers for basic git commands
 355;;;; ------------------------------------------------------------
 356
 357(defun git-rev-parse (rev)
 358  "Parse a revision name and return its SHA1."
 359  (git-get-string-sha1
 360   (git-call-process-env-string nil "rev-parse" rev)))
 361
 362(defun git-config (key)
 363  "Retrieve the value associated to KEY in the git repository config file."
 364  (let ((str (git-call-process-env-string nil "config" key)))
 365    (and str (car (split-string str "\n")))))
 366
 367(defun git-symbolic-ref (ref)
 368  "Wrapper for the git-symbolic-ref command."
 369  (let ((str (git-call-process-env-string nil "symbolic-ref" ref)))
 370    (and str (car (split-string str "\n")))))
 371
 372(defun git-update-ref (ref newval &optional oldval reason)
 373  "Update a reference by calling git-update-ref."
 374  (let ((args (and oldval (list oldval))))
 375    (push newval args)
 376    (push ref args)
 377    (when reason
 378     (push reason args)
 379     (push "-m" args))
 380    (eq 0 (apply #'git-call-process-env nil nil "update-ref" args))))
 381
 382(defun git-read-tree (tree &optional index-file)
 383  "Read a tree into the index file."
 384  (apply #'git-call-process-env nil
 385         (if index-file `(("GIT_INDEX_FILE" . ,index-file)) nil)
 386         "read-tree" (if tree (list tree))))
 387
 388(defun git-write-tree (&optional index-file)
 389  "Call git-write-tree and return the resulting tree SHA1 as a string."
 390  (git-get-string-sha1
 391   (git-call-process-env-string (and index-file `(("GIT_INDEX_FILE" . ,index-file))) "write-tree")))
 392
 393(defun git-commit-tree (buffer tree head)
 394  "Call git-commit-tree with buffer as input and return the resulting commit SHA1."
 395  (let ((author-name (git-get-committer-name))
 396        (author-email (git-get-committer-email))
 397        (subject "commit (initial): ")
 398        author-date log-start log-end args coding-system-for-write)
 399    (when head
 400      (setq subject "commit: ")
 401      (push "-p" args)
 402      (push head args))
 403    (with-current-buffer buffer
 404      (goto-char (point-min))
 405      (if
 406          (setq log-start (re-search-forward (concat "^" (regexp-quote git-log-msg-separator) "\n") nil t))
 407          (save-restriction
 408            (narrow-to-region (point-min) log-start)
 409            (goto-char (point-min))
 410            (when (re-search-forward "^Author: +\\(.*?\\) *<\\(.*\\)> *$" nil t)
 411              (setq author-name (match-string 1)
 412                    author-email (match-string 2)))
 413            (goto-char (point-min))
 414            (when (re-search-forward "^Date: +\\(.*\\)$" nil t)
 415              (setq author-date (match-string 1)))
 416            (goto-char (point-min))
 417            (while (re-search-forward "^Parent: +\\([0-9a-f]+\\)" nil t)
 418              (unless (string-equal head (match-string 1))
 419                (setq subject "commit (merge): ")
 420                (push "-p" args)
 421                (push (match-string 1) args))))
 422        (setq log-start (point-min)))
 423      (setq log-end (point-max))
 424      (goto-char log-start)
 425      (when (re-search-forward ".*$" nil t)
 426        (setq subject (concat subject (match-string 0))))
 427      (setq coding-system-for-write buffer-file-coding-system))
 428    (let ((commit
 429           (git-get-string-sha1
 430            (with-output-to-string
 431              (with-current-buffer standard-output
 432                (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
 433                             ("GIT_AUTHOR_EMAIL" . ,author-email)
 434                             ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
 435                             ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
 436                  (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
 437                  (apply #'git-run-command-region
 438                         buffer log-start log-end env
 439                         "commit-tree" tree (nreverse args))))))))
 440      (and (git-update-ref "HEAD" commit head subject)
 441           commit))))
 442
 443(defun git-empty-db-p ()
 444  "Check if the git db is empty (no commit done yet)."
 445  (not (eq 0 (call-process "git" nil nil nil "rev-parse" "--verify" "HEAD"))))
 446
 447(defun git-get-merge-heads ()
 448  "Retrieve the merge heads from the MERGE_HEAD file if present."
 449  (let (heads)
 450    (when (file-readable-p ".git/MERGE_HEAD")
 451      (with-temp-buffer
 452        (insert-file-contents ".git/MERGE_HEAD" nil nil nil t)
 453        (goto-char (point-min))
 454        (while (re-search-forward "[0-9a-f]\\{40\\}" nil t)
 455          (push (match-string 0) heads))))
 456    (nreverse heads)))
 457
 458(defun git-get-commit-description (commit)
 459  "Get a one-line description of COMMIT."
 460  (let ((coding-system-for-read (git-get-logoutput-coding-system)))
 461    (let ((descr (git-call-process-env-string nil "log" "--max-count=1" "--pretty=oneline" commit)))
 462      (if (and descr (string-match "\\`\\([0-9a-f]\\{40\\}\\) *\\(.*\\)$" descr))
 463          (concat (substring (match-string 1 descr) 0 10) " - " (match-string 2 descr))
 464        descr))))
 465
 466;;;; File info structure
 467;;;; ------------------------------------------------------------
 468
 469; fileinfo structure stolen from pcl-cvs
 470(defstruct (git-fileinfo
 471            (:copier nil)
 472            (:constructor git-create-fileinfo (state name &optional old-perm new-perm rename-state orig-name marked))
 473            (:conc-name git-fileinfo->))
 474  marked              ;; t/nil
 475  state               ;; current state
 476  name                ;; file name
 477  old-perm new-perm   ;; permission flags
 478  rename-state        ;; rename or copy state
 479  orig-name           ;; original name for renames or copies
 480  needs-refresh)      ;; whether file needs to be refreshed
 481
 482(defvar git-status nil)
 483
 484(defun git-clear-status (status)
 485  "Remove everything from the status list."
 486  (ewoc-filter status (lambda (info) nil)))
 487
 488(defun git-set-fileinfo-state (info state)
 489  "Set the state of a file info."
 490  (unless (eq (git-fileinfo->state info) state)
 491    (setf (git-fileinfo->state info) state
 492          (git-fileinfo->new-perm info) (git-fileinfo->old-perm info)
 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 'modified)
 527    (t nil)))
 528
 529(defun git-status-code-as-string (code)
 530  "Format a git status code as string."
 531  (case code
 532    ('modified (propertize "Modified" 'face 'git-status-face))
 533    ('unknown  (propertize "Unknown " 'face 'git-unknown-face))
 534    ('added    (propertize "Added   " 'face 'git-status-face))
 535    ('deleted  (propertize "Deleted " 'face 'git-status-face))
 536    ('unmerged (propertize "Unmerged" 'face 'git-unmerged-face))
 537    ('uptodate (propertize "Uptodate" 'face 'git-uptodate-face))
 538    ('ignored  (propertize "Ignored " 'face 'git-ignored-face))
 539    (t "?       ")))
 540
 541(defun git-file-type-as-string (info)
 542  "Return a string describing the file type of INFO."
 543  (let* ((old-type (lsh (or (git-fileinfo->old-perm info) 0) -9))
 544         (new-type (lsh (or (git-fileinfo->new-perm info) 0) -9))
 545         (str (case new-type
 546                (?\100  ;; file
 547                 (case old-type
 548                   (?\100 nil)
 549                   (?\120 "   (type change symlink -> file)")
 550                   (?\160 "   (type change subproject -> file)")))
 551                 (?\120  ;; symlink
 552                  (case old-type
 553                    (?\100 "   (type change file -> symlink)")
 554                    (?\160 "   (type change subproject -> symlink)")
 555                    (t "   (symlink)")))
 556                  (?\160  ;; subproject
 557                   (case old-type
 558                     (?\100 "   (type change file -> subproject)")
 559                     (?\120 "   (type change symlink -> subproject)")
 560                     (t "   (subproject)")))
 561                  (?\000  ;; deleted or unknown
 562                   (case old-type
 563                     (?\120 "   (symlink)")
 564                     (?\160 "   (subproject)")))
 565                  (t (format "   (unknown type %o)" new-type)))))
 566    (if str (propertize str 'face 'git-status-face) "")))
 567
 568(defun git-rename-as-string (info)
 569  "Return a string describing the copy or rename associated with INFO, or an empty string if none."
 570  (let ((state (git-fileinfo->rename-state info)))
 571    (if state
 572        (propertize
 573         (concat "   ("
 574                 (if (eq state 'copy) "copied from "
 575                   (if (eq (git-fileinfo->state info) 'added) "renamed from "
 576                     "renamed to "))
 577                 (git-escape-file-name (git-fileinfo->orig-name info))
 578                 ")") 'face 'git-status-face)
 579      "")))
 580
 581(defun git-permissions-as-string (old-perm new-perm)
 582  "Format a permission change as string."
 583  (propertize
 584   (if (or (not old-perm)
 585           (not new-perm)
 586           (eq 0 (logand ?\111 (logxor old-perm new-perm))))
 587       "  "
 588     (if (eq 0 (logand ?\111 old-perm)) "+x" "-x"))
 589  'face 'git-permission-face))
 590
 591(defun git-fileinfo-prettyprint (info)
 592  "Pretty-printer for the git-fileinfo structure."
 593  (insert (concat "   " (if (git-fileinfo->marked info) (propertize "*" 'face 'git-mark-face) " ")
 594                  " " (git-status-code-as-string (git-fileinfo->state info))
 595                  " " (git-permissions-as-string (git-fileinfo->old-perm info) (git-fileinfo->new-perm info))
 596                  "  " (git-escape-file-name (git-fileinfo->name info))
 597                  (git-file-type-as-string info)
 598                  (git-rename-as-string info))))
 599
 600(defun git-insert-info-list (status infolist)
 601  "Insert a list of file infos in the status buffer, replacing existing ones if any."
 602  (setq infolist (sort infolist
 603                       (lambda (info1 info2)
 604                         (string-lessp (git-fileinfo->name info1)
 605                                       (git-fileinfo->name info2)))))
 606  (let ((info (pop infolist))
 607        (node (ewoc-nth status 0)))
 608    (while info
 609      (setf (git-fileinfo->needs-refresh info) t)
 610      (cond ((not node)
 611             (ewoc-enter-last status info)
 612             (setq info (pop infolist)))
 613            ((string-lessp (git-fileinfo->name (ewoc-data node))
 614                           (git-fileinfo->name info))
 615             (setq node (ewoc-next status node)))
 616            ((string-equal (git-fileinfo->name (ewoc-data node))
 617                           (git-fileinfo->name info))
 618              ;; preserve the marked flag
 619              (setf (git-fileinfo->marked info) (git-fileinfo->marked (ewoc-data node)))
 620              (setf (ewoc-data node) info)
 621              (setq info (pop infolist)))
 622            (t
 623             (ewoc-enter-before status node info)
 624             (setq info (pop infolist)))))))
 625
 626(defun git-run-diff-index (status files)
 627  "Run git-diff-index on FILES and parse the results into STATUS.
 628Return the list of files that haven't been handled."
 629  (let (infolist)
 630    (with-temp-buffer
 631      (apply #'git-call-process-env t nil "diff-index" "-z" "-M" "HEAD" "--" files)
 632      (goto-char (point-min))
 633      (while (re-search-forward
 634              ":\\([0-7]\\{6\\}\\) \\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} [0-9a-f]\\{40\\} \\(\\([ADMUT]\\)\0\\([^\0]+\\)\\|\\([CR]\\)[0-9]*\0\\([^\0]+\\)\0\\([^\0]+\\)\\)\0"
 635              nil t 1)
 636        (let ((old-perm (string-to-number (match-string 1) 8))
 637              (new-perm (string-to-number (match-string 2) 8))
 638              (state (or (match-string 4) (match-string 6)))
 639              (name (or (match-string 5) (match-string 7)))
 640              (new-name (match-string 8)))
 641          (if new-name  ; copy or rename
 642              (if (eq ?C (string-to-char state))
 643                  (push (git-create-fileinfo 'added new-name old-perm new-perm 'copy name) infolist)
 644                (push (git-create-fileinfo 'deleted name 0 0 'rename new-name) infolist)
 645                (push (git-create-fileinfo 'added new-name old-perm new-perm 'rename name) infolist))
 646            (push (git-create-fileinfo (git-state-code state) name old-perm new-perm) infolist))
 647          (setq files (delete name files))
 648          (when new-name (setq files (delete new-name files))))))
 649    (git-insert-info-list status infolist)
 650    files))
 651
 652(defun git-find-status-file (status file)
 653  "Find a given file in the status ewoc and return its node."
 654  (let ((node (ewoc-nth status 0)))
 655    (while (and node (not (string= file (git-fileinfo->name (ewoc-data node)))))
 656      (setq node (ewoc-next status node)))
 657    node))
 658
 659(defun git-run-ls-files (status files default-state &rest options)
 660  "Run git-ls-files on FILES and parse the results into STATUS.
 661Return the list of files that haven't been handled."
 662  (let (infolist)
 663    (with-temp-buffer
 664      (apply #'git-call-process-env t nil "ls-files" "-z" (append options (list "--") files))
 665      (goto-char (point-min))
 666      (while (re-search-forward "\\([^\0]*\\)\0" nil t 1)
 667        (let ((name (match-string 1)))
 668          (push (git-create-fileinfo default-state name) infolist)
 669          (setq files (delete name files)))))
 670    (git-insert-info-list status infolist)
 671    files))
 672
 673(defun git-run-ls-files-cached (status files default-state)
 674  "Run git-ls-files -c on FILES and parse the results into STATUS.
 675Return the list of files that haven't been handled."
 676  (let (infolist)
 677    (with-temp-buffer
 678      (apply #'git-call-process-env t nil "ls-files" "-z" "-s" "-c" "--" files)
 679      (goto-char (point-min))
 680      (while (re-search-forward "\\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} [0-3]\t\\([^\0]+\\)\0" nil t)
 681        (let* ((new-perm (string-to-number (match-string 1) 8))
 682               (old-perm (if (eq default-state 'added) 0 new-perm))
 683               (name (match-string 2)))
 684          (push (git-create-fileinfo default-state name old-perm new-perm) infolist)
 685          (setq files (delete name files)))))
 686    (git-insert-info-list status infolist)
 687    files))
 688
 689(defun git-run-ls-unmerged (status files)
 690  "Run git-ls-files -u on FILES and parse the results into STATUS."
 691  (with-temp-buffer
 692    (apply #'git-call-process-env t nil "ls-files" "-z" "-u" "--" files)
 693    (goto-char (point-min))
 694    (let (unmerged-files)
 695      (while (re-search-forward "[0-7]\\{6\\} [0-9a-f]\\{40\\} [123]\t\\([^\0]+\\)\0" nil t)
 696        (push (match-string 1) unmerged-files))
 697      (git-set-filenames-state status unmerged-files 'unmerged))))
 698
 699(defun git-get-exclude-files ()
 700  "Get the list of exclude files to pass to git-ls-files."
 701  (let (files
 702        (config (git-config "core.excludesfile")))
 703    (when (file-readable-p ".git/info/exclude")
 704      (push ".git/info/exclude" files))
 705    (when (and config (file-readable-p config))
 706      (push config files))
 707    files))
 708
 709(defun git-run-ls-files-with-excludes (status files default-state &rest options)
 710  "Run git-ls-files on FILES with appropriate --exclude-from options."
 711  (let ((exclude-files (git-get-exclude-files)))
 712    (apply #'git-run-ls-files status files default-state
 713           (concat "--exclude-per-directory=" git-per-dir-ignore-file)
 714           (append options (mapcar (lambda (f) (concat "--exclude-from=" f)) exclude-files)))))
 715
 716(defun git-update-status-files (files &optional default-state)
 717  "Update the status of FILES from the index."
 718  (unless git-status (error "Not in git-status buffer."))
 719  (unless files
 720    (when git-show-uptodate (git-run-ls-files-cached git-status nil 'uptodate)))
 721  (let* ((remaining-files
 722          (if (git-empty-db-p) ; we need some special handling for an empty db
 723              (git-run-ls-files-cached git-status files 'added)
 724            (git-run-diff-index git-status files))))
 725    (git-run-ls-unmerged git-status files)
 726    (when (or remaining-files (and git-show-unknown (not files)))
 727      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'unknown "-o")))
 728    (when (or remaining-files (and git-show-ignored (not files)))
 729      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'ignored "-o" "-i")))
 730    (git-set-filenames-state git-status remaining-files default-state)
 731    (git-refresh-files)
 732    (git-refresh-ewoc-hf git-status)))
 733
 734(defun git-marked-files ()
 735  "Return a list of all marked files, or if none a list containing just the file at cursor position."
 736  (unless git-status (error "Not in git-status buffer."))
 737  (or (ewoc-collect git-status (lambda (info) (git-fileinfo->marked info)))
 738      (list (ewoc-data (ewoc-locate git-status)))))
 739
 740(defun git-marked-files-state (&rest states)
 741  "Return marked files that are in the specified states."
 742  (let ((files (git-marked-files))
 743        result)
 744    (dolist (info files)
 745      (when (memq (git-fileinfo->state info) states)
 746        (push info result)))
 747    result))
 748
 749(defun git-refresh-files ()
 750  "Refresh all files that need it and clear the needs-refresh flag."
 751  (unless git-status (error "Not in git-status buffer."))
 752  (ewoc-map
 753   (lambda (info)
 754     (let ((refresh (git-fileinfo->needs-refresh info)))
 755       (setf (git-fileinfo->needs-refresh info) nil)
 756       refresh))
 757   git-status)
 758  ; move back to goal column
 759  (when goal-column (move-to-column goal-column)))
 760
 761(defun git-refresh-ewoc-hf (status)
 762  "Refresh the ewoc header and footer."
 763  (let ((branch (git-symbolic-ref "HEAD"))
 764        (head (if (git-empty-db-p) "Nothing committed yet"
 765                (git-get-commit-description "HEAD")))
 766        (merge-heads (git-get-merge-heads)))
 767    (ewoc-set-hf status
 768                 (format "Directory:  %s\nBranch:     %s\nHead:       %s%s\n"
 769                         default-directory
 770                         (if branch
 771                             (if (string-match "^refs/heads/" branch)
 772                                 (substring branch (match-end 0))
 773                               branch)
 774                           "none (detached HEAD)")
 775                         head
 776                         (if merge-heads
 777                             (concat "\nMerging:    "
 778                                     (mapconcat (lambda (str) (git-get-commit-description str)) merge-heads "\n            "))
 779                           ""))
 780                 (if (ewoc-nth status 0) "" "    No changes."))))
 781
 782(defun git-get-filenames (files)
 783  (mapcar (lambda (info) (git-fileinfo->name info)) files))
 784
 785(defun git-update-index (index-file files)
 786  "Run git-update-index on a list of files."
 787  (let ((env (and index-file `(("GIT_INDEX_FILE" . ,index-file))))
 788        added deleted modified)
 789    (dolist (info files)
 790      (case (git-fileinfo->state info)
 791        ('added (push info added))
 792        ('deleted (push info deleted))
 793        ('modified (push info modified))))
 794    (when added
 795      (apply #'git-call-process-env nil env "update-index" "--add" "--" (git-get-filenames added)))
 796    (when deleted
 797      (apply #'git-call-process-env nil env "update-index" "--remove" "--" (git-get-filenames deleted)))
 798    (when modified
 799      (apply #'git-call-process-env nil env "update-index" "--" (git-get-filenames modified)))))
 800
 801(defun git-run-pre-commit-hook ()
 802  "Run the pre-commit hook if any."
 803  (unless git-status (error "Not in git-status buffer."))
 804  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
 805    (or (not files)
 806        (not (file-executable-p ".git/hooks/pre-commit"))
 807        (let ((index-file (make-temp-file "gitidx")))
 808          (unwind-protect
 809            (let ((head-tree (unless (git-empty-db-p) (git-rev-parse "HEAD^{tree}"))))
 810              (git-read-tree head-tree index-file)
 811              (git-update-index index-file files)
 812              (git-run-hook "pre-commit" `(("GIT_INDEX_FILE" . ,index-file))))
 813          (delete-file index-file))))))
 814
 815(defun git-do-commit ()
 816  "Perform the actual commit using the current buffer as log message."
 817  (interactive)
 818  (let ((buffer (current-buffer))
 819        (index-file (make-temp-file "gitidx")))
 820    (with-current-buffer log-edit-parent-buffer
 821      (if (git-marked-files-state 'unmerged)
 822          (message "You cannot commit unmerged files, resolve them first.")
 823        (unwind-protect
 824            (let ((files (git-marked-files-state 'added 'deleted 'modified))
 825                  head head-tree)
 826              (unless (git-empty-db-p)
 827                (setq head (git-rev-parse "HEAD")
 828                      head-tree (git-rev-parse "HEAD^{tree}")))
 829              (if files
 830                  (progn
 831                    (message "Running git commit...")
 832                    (git-read-tree head-tree index-file)
 833                    (git-update-index nil files)         ;update both the default index
 834                    (git-update-index index-file files)  ;and the temporary one
 835                    (let ((tree (git-write-tree index-file)))
 836                      (if (or (not (string-equal tree head-tree))
 837                              (yes-or-no-p "The tree was not modified, do you really want to perform an empty commit? "))
 838                          (let ((commit (git-commit-tree buffer tree head)))
 839                            (condition-case nil (delete-file ".git/MERGE_HEAD") (error nil))
 840                            (condition-case nil (delete-file ".git/MERGE_MSG") (error nil))
 841                            (with-current-buffer buffer (erase-buffer))
 842                            (dolist (info files) (git-set-fileinfo-state info 'uptodate))
 843                            (git-call-process-env nil nil "rerere")
 844                            (git-call-process-env nil nil "gc" "--auto")
 845                            (git-refresh-files)
 846                            (git-refresh-ewoc-hf git-status)
 847                            (message "Committed %s." commit)
 848                            (git-run-hook "post-commit" nil))
 849                        (message "Commit aborted."))))
 850                (message "No files to commit.")))
 851          (delete-file index-file))))))
 852
 853
 854;;;; Interactive functions
 855;;;; ------------------------------------------------------------
 856
 857(defun git-mark-file ()
 858  "Mark the file that the cursor is on and move to the next one."
 859  (interactive)
 860  (unless git-status (error "Not in git-status buffer."))
 861  (let* ((pos (ewoc-locate git-status))
 862         (info (ewoc-data pos)))
 863    (setf (git-fileinfo->marked info) t)
 864    (ewoc-invalidate git-status pos)
 865    (ewoc-goto-next git-status 1)))
 866
 867(defun git-unmark-file ()
 868  "Unmark the file that the cursor is on and move to the next one."
 869  (interactive)
 870  (unless git-status (error "Not in git-status buffer."))
 871  (let* ((pos (ewoc-locate git-status))
 872         (info (ewoc-data pos)))
 873    (setf (git-fileinfo->marked info) nil)
 874    (ewoc-invalidate git-status pos)
 875    (ewoc-goto-next git-status 1)))
 876
 877(defun git-unmark-file-up ()
 878  "Unmark the file that the cursor is on and move to the previous one."
 879  (interactive)
 880  (unless git-status (error "Not in git-status buffer."))
 881  (let* ((pos (ewoc-locate git-status))
 882         (info (ewoc-data pos)))
 883    (setf (git-fileinfo->marked info) nil)
 884    (ewoc-invalidate git-status pos)
 885    (ewoc-goto-prev git-status 1)))
 886
 887(defun git-mark-all ()
 888  "Mark all files."
 889  (interactive)
 890  (unless git-status (error "Not in git-status buffer."))
 891  (ewoc-map (lambda (info) (unless (git-fileinfo->marked info)
 892                             (setf (git-fileinfo->marked info) t))) git-status)
 893  ; move back to goal column after invalidate
 894  (when goal-column (move-to-column goal-column)))
 895
 896(defun git-unmark-all ()
 897  "Unmark all files."
 898  (interactive)
 899  (unless git-status (error "Not in git-status buffer."))
 900  (ewoc-map (lambda (info) (when (git-fileinfo->marked info)
 901                             (setf (git-fileinfo->marked info) nil)
 902                             t)) git-status)
 903  ; move back to goal column after invalidate
 904  (when goal-column (move-to-column goal-column)))
 905
 906(defun git-toggle-all-marks ()
 907  "Toggle all file marks."
 908  (interactive)
 909  (unless git-status (error "Not in git-status buffer."))
 910  (ewoc-map (lambda (info) (setf (git-fileinfo->marked info) (not (git-fileinfo->marked info))) t) git-status)
 911  ; move back to goal column after invalidate
 912  (when goal-column (move-to-column goal-column)))
 913
 914(defun git-next-file (&optional n)
 915  "Move the selection down N files."
 916  (interactive "p")
 917  (unless git-status (error "Not in git-status buffer."))
 918  (ewoc-goto-next git-status n))
 919
 920(defun git-prev-file (&optional n)
 921  "Move the selection up N files."
 922  (interactive "p")
 923  (unless git-status (error "Not in git-status buffer."))
 924  (ewoc-goto-prev git-status n))
 925
 926(defun git-next-unmerged-file (&optional n)
 927  "Move the selection down N unmerged files."
 928  (interactive "p")
 929  (unless git-status (error "Not in git-status buffer."))
 930  (let* ((last (ewoc-locate git-status))
 931         (node (ewoc-next git-status last)))
 932    (while (and node (> n 0))
 933      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 934        (setq n (1- n))
 935        (setq last node))
 936      (setq node (ewoc-next git-status node)))
 937    (ewoc-goto-node git-status last)))
 938
 939(defun git-prev-unmerged-file (&optional n)
 940  "Move the selection up N unmerged files."
 941  (interactive "p")
 942  (unless git-status (error "Not in git-status buffer."))
 943  (let* ((last (ewoc-locate git-status))
 944         (node (ewoc-prev git-status last)))
 945    (while (and node (> n 0))
 946      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 947        (setq n (1- n))
 948        (setq last node))
 949      (setq node (ewoc-prev git-status node)))
 950    (ewoc-goto-node git-status last)))
 951
 952(defun git-add-file ()
 953  "Add marked file(s) to the index cache."
 954  (interactive)
 955  (let ((files (git-get-filenames (git-marked-files-state 'unknown 'ignored))))
 956    (unless files
 957      (push (file-relative-name (read-file-name "File to add: " nil nil t)) files))
 958    (apply #'git-call-process-env nil nil "update-index" "--add" "--" files)
 959    (git-update-status-files files 'uptodate)
 960    (git-success-message "Added" files)))
 961
 962(defun git-ignore-file ()
 963  "Add marked file(s) to the ignore list."
 964  (interactive)
 965  (let ((files (git-get-filenames (git-marked-files-state 'unknown))))
 966    (unless files
 967      (push (file-relative-name (read-file-name "File to ignore: " nil nil t)) files))
 968    (dolist (f files) (git-append-to-ignore f))
 969    (git-update-status-files files 'ignored)
 970    (git-success-message "Ignored" files)))
 971
 972(defun git-remove-file ()
 973  "Remove the marked file(s)."
 974  (interactive)
 975  (let ((files (git-get-filenames (git-marked-files-state 'added 'modified 'unknown 'uptodate 'ignored))))
 976    (unless files
 977      (push (file-relative-name (read-file-name "File to remove: " nil nil t)) files))
 978    (if (yes-or-no-p
 979         (format "Remove %d file%s? " (length files) (if (> (length files) 1) "s" "")))
 980        (progn
 981          (dolist (name files)
 982            (when (file-exists-p name) (delete-file name)))
 983          (apply #'git-call-process-env nil nil "update-index" "--remove" "--" files)
 984          (git-update-status-files files nil)
 985          (git-success-message "Removed" files))
 986      (message "Aborting"))))
 987
 988(defun git-revert-file ()
 989  "Revert changes to the marked file(s)."
 990  (interactive)
 991  (let ((files (git-marked-files))
 992        added modified)
 993    (when (and files
 994               (yes-or-no-p
 995                (format "Revert %d file%s? " (length files) (if (> (length files) 1) "s" ""))))
 996      (dolist (info files)
 997        (case (git-fileinfo->state info)
 998          ('added (push (git-fileinfo->name info) added))
 999          ('deleted (push (git-fileinfo->name info) modified))
1000          ('unmerged (push (git-fileinfo->name info) modified))
1001          ('modified (push (git-fileinfo->name info) modified))))
1002      (when added
1003        (apply #'git-call-process-env nil nil "update-index" "--force-remove" "--" added))
1004      (when modified
1005        (apply #'git-call-process-env nil nil "checkout" "HEAD" modified))
1006      (git-update-status-files (append added modified) 'uptodate)
1007      (git-success-message "Reverted" (git-get-filenames files)))))
1008
1009(defun git-resolve-file ()
1010  "Resolve conflicts in marked file(s)."
1011  (interactive)
1012  (let ((files (git-get-filenames (git-marked-files-state 'unmerged))))
1013    (when files
1014      (apply #'git-call-process-env nil nil "update-index" "--" files)
1015      (git-update-status-files files 'uptodate)
1016      (git-success-message "Resolved" files))))
1017
1018(defun git-remove-handled ()
1019  "Remove handled files from the status list."
1020  (interactive)
1021  (ewoc-filter git-status
1022               (lambda (info)
1023                 (case (git-fileinfo->state info)
1024                   ('ignored git-show-ignored)
1025                   ('uptodate git-show-uptodate)
1026                   ('unknown git-show-unknown)
1027                   (t t))))
1028  (unless (ewoc-nth git-status 0)  ; refresh header if list is empty
1029    (git-refresh-ewoc-hf git-status)))
1030
1031(defun git-toggle-show-uptodate ()
1032  "Toogle the option for showing up-to-date files."
1033  (interactive)
1034  (if (setq git-show-uptodate (not git-show-uptodate))
1035      (git-refresh-status)
1036    (git-remove-handled)))
1037
1038(defun git-toggle-show-ignored ()
1039  "Toogle the option for showing ignored files."
1040  (interactive)
1041  (if (setq git-show-ignored (not git-show-ignored))
1042      (progn
1043        (message "Inserting ignored files...")
1044        (git-run-ls-files-with-excludes git-status nil 'ignored "-o" "-i")
1045        (git-refresh-files)
1046        (git-refresh-ewoc-hf git-status)
1047        (message "Inserting ignored files...done"))
1048    (git-remove-handled)))
1049
1050(defun git-toggle-show-unknown ()
1051  "Toogle the option for showing unknown files."
1052  (interactive)
1053  (if (setq git-show-unknown (not git-show-unknown))
1054      (progn
1055        (message "Inserting unknown files...")
1056        (git-run-ls-files-with-excludes git-status nil 'unknown "-o")
1057        (git-refresh-files)
1058        (git-refresh-ewoc-hf git-status)
1059        (message "Inserting unknown files...done"))
1060    (git-remove-handled)))
1061
1062(defun git-setup-diff-buffer (buffer)
1063  "Setup a buffer for displaying a diff."
1064  (let ((dir default-directory))
1065    (with-current-buffer buffer
1066      (diff-mode)
1067      (goto-char (point-min))
1068      (setq default-directory dir)
1069      (setq buffer-read-only t)))
1070  (display-buffer buffer)
1071  ; shrink window only if it displays the status buffer
1072  (when (eq (window-buffer) (current-buffer))
1073    (shrink-window-if-larger-than-buffer)))
1074
1075(defun git-diff-file ()
1076  "Diff the marked file(s) against HEAD."
1077  (interactive)
1078  (let ((files (git-marked-files)))
1079    (git-setup-diff-buffer
1080     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M" "HEAD" "--" (git-get-filenames files)))))
1081
1082(defun git-diff-file-merge-head (arg)
1083  "Diff the marked file(s) against the first merge head (or the nth one with a numeric prefix)."
1084  (interactive "p")
1085  (let ((files (git-marked-files))
1086        (merge-heads (git-get-merge-heads)))
1087    (unless merge-heads (error "No merge in progress"))
1088    (git-setup-diff-buffer
1089     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M"
1090            (or (nth (1- arg) merge-heads) "HEAD") "--" (git-get-filenames files)))))
1091
1092(defun git-diff-unmerged-file (stage)
1093  "Diff the marked unmerged file(s) against the specified stage."
1094  (let ((files (git-marked-files)))
1095    (git-setup-diff-buffer
1096     (apply #'git-run-command-buffer "*git-diff*" "diff-files" "-p" stage "--" (git-get-filenames files)))))
1097
1098(defun git-diff-file-base ()
1099  "Diff the marked unmerged file(s) against the common base file."
1100  (interactive)
1101  (git-diff-unmerged-file "-1"))
1102
1103(defun git-diff-file-mine ()
1104  "Diff the marked unmerged file(s) against my pre-merge version."
1105  (interactive)
1106  (git-diff-unmerged-file "-2"))
1107
1108(defun git-diff-file-other ()
1109  "Diff the marked unmerged file(s) against the other's pre-merge version."
1110  (interactive)
1111  (git-diff-unmerged-file "-3"))
1112
1113(defun git-diff-file-combined ()
1114  "Do a combined diff of the marked unmerged file(s)."
1115  (interactive)
1116  (git-diff-unmerged-file "-c"))
1117
1118(defun git-diff-file-idiff ()
1119  "Perform an interactive diff on the current file."
1120  (interactive)
1121  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
1122    (unless (eq 1 (length files))
1123      (error "Cannot perform an interactive diff on multiple files."))
1124    (let* ((filename (car (git-get-filenames files)))
1125           (buff1 (find-file-noselect filename))
1126           (buff2 (git-run-command-buffer (concat filename ".~HEAD~") "cat-file" "blob" (concat "HEAD:" filename))))
1127      (ediff-buffers buff1 buff2))))
1128
1129(defun git-log-file ()
1130  "Display a log of changes to the marked file(s)."
1131  (interactive)
1132  (let* ((files (git-marked-files))
1133         (coding-system-for-read git-commits-coding-system)
1134         (buffer (apply #'git-run-command-buffer "*git-log*" "rev-list" "--pretty" "HEAD" "--" (git-get-filenames files))))
1135    (with-current-buffer buffer
1136      ; (git-log-mode)  FIXME: implement log mode
1137      (goto-char (point-min))
1138      (setq buffer-read-only t))
1139    (display-buffer buffer)))
1140
1141(defun git-log-edit-files ()
1142  "Return a list of marked files for use in the log-edit buffer."
1143  (with-current-buffer log-edit-parent-buffer
1144    (git-get-filenames (git-marked-files-state 'added 'deleted 'modified))))
1145
1146(defun git-log-edit-diff ()
1147  "Run a diff of the current files being committed from a log-edit buffer."
1148  (with-current-buffer log-edit-parent-buffer
1149    (git-diff-file)))
1150
1151(defun git-append-sign-off (name email)
1152  "Append a Signed-off-by entry to the current buffer, avoiding duplicates."
1153  (let ((sign-off (format "Signed-off-by: %s <%s>" name email))
1154        (case-fold-search t))
1155    (goto-char (point-min))
1156    (unless (re-search-forward (concat "^" (regexp-quote sign-off)) nil t)
1157      (goto-char (point-min))
1158      (unless (re-search-forward "^Signed-off-by: " nil t)
1159        (setq sign-off (concat "\n" sign-off)))
1160      (goto-char (point-max))
1161      (insert sign-off "\n"))))
1162
1163(defun git-setup-log-buffer (buffer &optional author-name author-email subject date msg)
1164  "Setup the log buffer for a commit."
1165  (unless git-status (error "Not in git-status buffer."))
1166  (let ((merge-heads (git-get-merge-heads))
1167        (dir default-directory)
1168        (committer-name (git-get-committer-name))
1169        (committer-email (git-get-committer-email))
1170        (sign-off git-append-signed-off-by))
1171    (with-current-buffer buffer
1172      (cd dir)
1173      (erase-buffer)
1174      (insert
1175       (propertize
1176        (format "Author: %s <%s>\n%s%s"
1177                (or author-name committer-name)
1178                (or author-email committer-email)
1179                (if date (format "Date: %s\n" date) "")
1180                (if merge-heads
1181                    (format "Parent: %s\n%s\n"
1182                            (git-rev-parse "HEAD")
1183                            (mapconcat (lambda (str) (concat "Parent: " str)) merge-heads "\n"))
1184                  ""))
1185        'face 'git-header-face)
1186       (propertize git-log-msg-separator 'face 'git-separator-face)
1187       "\n")
1188      (when subject (insert subject "\n\n"))
1189      (cond (msg (insert msg "\n"))
1190            ((file-readable-p ".dotest/msg")
1191             (insert-file-contents ".dotest/msg"))
1192            ((file-readable-p ".git/MERGE_MSG")
1193             (insert-file-contents ".git/MERGE_MSG")))
1194      ; delete empty lines at end
1195      (goto-char (point-min))
1196      (when (re-search-forward "\n+\\'" nil t)
1197        (replace-match "\n" t t))
1198      (when sign-off (git-append-sign-off committer-name committer-email)))))
1199
1200(defun git-commit-file ()
1201  "Commit the marked file(s), asking for a commit message."
1202  (interactive)
1203  (unless git-status (error "Not in git-status buffer."))
1204  (when (git-run-pre-commit-hook)
1205    (let ((buffer (get-buffer-create "*git-commit*"))
1206          (coding-system (git-get-commits-coding-system))
1207          author-name author-email subject date)
1208      (when (eq 0 (buffer-size buffer))
1209        (when (file-readable-p ".dotest/info")
1210          (with-temp-buffer
1211            (insert-file-contents ".dotest/info")
1212            (goto-char (point-min))
1213            (when (re-search-forward "^Author: \\(.*\\)\nEmail: \\(.*\\)$" nil t)
1214              (setq author-name (match-string 1))
1215              (setq author-email (match-string 2)))
1216            (goto-char (point-min))
1217            (when (re-search-forward "^Subject: \\(.*\\)$" nil t)
1218              (setq subject (match-string 1)))
1219            (goto-char (point-min))
1220            (when (re-search-forward "^Date: \\(.*\\)$" nil t)
1221              (setq date (match-string 1)))))
1222        (git-setup-log-buffer buffer author-name author-email subject date))
1223      (if (boundp 'log-edit-diff-function)
1224          (log-edit 'git-do-commit nil '((log-edit-listfun . git-log-edit-files)
1225                                         (log-edit-diff-function . git-log-edit-diff)) buffer)
1226        (log-edit 'git-do-commit nil 'git-log-edit-files buffer))
1227      (setq font-lock-keywords (font-lock-compile-keywords git-log-edit-font-lock-keywords))
1228      (setq buffer-file-coding-system coding-system)
1229      (re-search-forward (regexp-quote (concat git-log-msg-separator "\n")) nil t))))
1230
1231(defun git-find-file ()
1232  "Visit the current file in its own buffer."
1233  (interactive)
1234  (unless git-status (error "Not in git-status buffer."))
1235  (let ((info (ewoc-data (ewoc-locate git-status))))
1236    (find-file (git-fileinfo->name info))
1237    (when (eq 'unmerged (git-fileinfo->state info))
1238      (smerge-mode 1))))
1239
1240(defun git-find-file-other-window ()
1241  "Visit the current file in its own buffer in another window."
1242  (interactive)
1243  (unless git-status (error "Not in git-status buffer."))
1244  (let ((info (ewoc-data (ewoc-locate git-status))))
1245    (find-file-other-window (git-fileinfo->name info))
1246    (when (eq 'unmerged (git-fileinfo->state info))
1247      (smerge-mode))))
1248
1249(defun git-find-file-imerge ()
1250  "Visit the current file in interactive merge mode."
1251  (interactive)
1252  (unless git-status (error "Not in git-status buffer."))
1253  (let ((info (ewoc-data (ewoc-locate git-status))))
1254    (find-file (git-fileinfo->name info))
1255    (smerge-ediff)))
1256
1257(defun git-view-file ()
1258  "View the current file in its own buffer."
1259  (interactive)
1260  (unless git-status (error "Not in git-status buffer."))
1261  (let ((info (ewoc-data (ewoc-locate git-status))))
1262    (view-file (git-fileinfo->name info))))
1263
1264(defun git-refresh-status ()
1265  "Refresh the git status buffer."
1266  (interactive)
1267  (let* ((status git-status)
1268         (pos (ewoc-locate status))
1269         (marked-files (git-get-filenames (ewoc-collect status (lambda (info) (git-fileinfo->marked info)))))
1270         (cur-name (and pos (git-fileinfo->name (ewoc-data pos)))))
1271    (unless status (error "Not in git-status buffer."))
1272    (message "Refreshing git status...")
1273    (git-call-process-env nil nil "update-index" "--refresh")
1274    (git-clear-status status)
1275    (git-update-status-files nil)
1276    ; restore file marks
1277    (when marked-files
1278      (git-status-filenames-map status
1279                                (lambda (info)
1280                                        (setf (git-fileinfo->marked info) t)
1281                                        (setf (git-fileinfo->needs-refresh info) t))
1282                                marked-files)
1283      (git-refresh-files))
1284    ; move point to the current file name if any
1285    (message "Refreshing git status...done")
1286    (let ((node (and cur-name (git-find-status-file status cur-name))))
1287      (when node (ewoc-goto-node status node)))))
1288
1289(defun git-status-quit ()
1290  "Quit git-status mode."
1291  (interactive)
1292  (bury-buffer))
1293
1294;;;; Major Mode
1295;;;; ------------------------------------------------------------
1296
1297(defvar git-status-mode-hook nil
1298  "Run after `git-status-mode' is setup.")
1299
1300(defvar git-status-mode-map nil
1301  "Keymap for git major mode.")
1302
1303(defvar git-status nil
1304  "List of all files managed by the git-status mode.")
1305
1306(unless git-status-mode-map
1307  (let ((map (make-keymap))
1308        (diff-map (make-sparse-keymap))
1309        (toggle-map (make-sparse-keymap)))
1310    (suppress-keymap map)
1311    (define-key map "?"   'git-help)
1312    (define-key map "h"   'git-help)
1313    (define-key map " "   'git-next-file)
1314    (define-key map "a"   'git-add-file)
1315    (define-key map "c"   'git-commit-file)
1316    (define-key map "d"    diff-map)
1317    (define-key map "="   'git-diff-file)
1318    (define-key map "f"   'git-find-file)
1319    (define-key map "\r"  'git-find-file)
1320    (define-key map "g"   'git-refresh-status)
1321    (define-key map "i"   'git-ignore-file)
1322    (define-key map "l"   'git-log-file)
1323    (define-key map "m"   'git-mark-file)
1324    (define-key map "M"   'git-mark-all)
1325    (define-key map "n"   'git-next-file)
1326    (define-key map "N"   'git-next-unmerged-file)
1327    (define-key map "o"   'git-find-file-other-window)
1328    (define-key map "p"   'git-prev-file)
1329    (define-key map "P"   'git-prev-unmerged-file)
1330    (define-key map "q"   'git-status-quit)
1331    (define-key map "r"   'git-remove-file)
1332    (define-key map "R"   'git-resolve-file)
1333    (define-key map "t"    toggle-map)
1334    (define-key map "T"   'git-toggle-all-marks)
1335    (define-key map "u"   'git-unmark-file)
1336    (define-key map "U"   'git-revert-file)
1337    (define-key map "v"   'git-view-file)
1338    (define-key map "x"   'git-remove-handled)
1339    (define-key map "\C-?" 'git-unmark-file-up)
1340    (define-key map "\M-\C-?" 'git-unmark-all)
1341    ; the diff submap
1342    (define-key diff-map "b" 'git-diff-file-base)
1343    (define-key diff-map "c" 'git-diff-file-combined)
1344    (define-key diff-map "=" 'git-diff-file)
1345    (define-key diff-map "e" 'git-diff-file-idiff)
1346    (define-key diff-map "E" 'git-find-file-imerge)
1347    (define-key diff-map "h" 'git-diff-file-merge-head)
1348    (define-key diff-map "m" 'git-diff-file-mine)
1349    (define-key diff-map "o" 'git-diff-file-other)
1350    ; the toggle submap
1351    (define-key toggle-map "u" 'git-toggle-show-uptodate)
1352    (define-key toggle-map "i" 'git-toggle-show-ignored)
1353    (define-key toggle-map "k" 'git-toggle-show-unknown)
1354    (define-key toggle-map "m" 'git-toggle-all-marks)
1355    (setq git-status-mode-map map))
1356  (easy-menu-define git-menu git-status-mode-map
1357    "Git Menu"
1358    `("Git"
1359      ["Refresh" git-refresh-status t]
1360      ["Commit" git-commit-file t]
1361      ("Merge"
1362        ["Next Unmerged File" git-next-unmerged-file t]
1363        ["Prev Unmerged File" git-prev-unmerged-file t]
1364        ["Mark as Resolved" git-resolve-file t]
1365        ["Interactive Merge File" git-find-file-imerge t]
1366        ["Diff Against Common Base File" git-diff-file-base t]
1367        ["Diff Combined" git-diff-file-combined t]
1368        ["Diff Against Merge Head" git-diff-file-merge-head t]
1369        ["Diff Against Mine" git-diff-file-mine t]
1370        ["Diff Against Other" git-diff-file-other t])
1371      "--------"
1372      ["Add File" git-add-file t]
1373      ["Revert File" git-revert-file t]
1374      ["Ignore File" git-ignore-file t]
1375      ["Remove File" git-remove-file t]
1376      "--------"
1377      ["Find File" git-find-file t]
1378      ["View File" git-view-file t]
1379      ["Diff File" git-diff-file t]
1380      ["Interactive Diff File" git-diff-file-idiff t]
1381      ["Log" git-log-file t]
1382      "--------"
1383      ["Mark" git-mark-file t]
1384      ["Mark All" git-mark-all t]
1385      ["Unmark" git-unmark-file t]
1386      ["Unmark All" git-unmark-all t]
1387      ["Toggle All Marks" git-toggle-all-marks t]
1388      ["Hide Handled Files" git-remove-handled t]
1389      "--------"
1390      ["Show Uptodate Files" git-toggle-show-uptodate :style toggle :selected git-show-uptodate]
1391      ["Show Ignored Files" git-toggle-show-ignored :style toggle :selected git-show-ignored]
1392      ["Show Unknown Files" git-toggle-show-unknown :style toggle :selected git-show-unknown]
1393      "--------"
1394      ["Quit" git-status-quit t])))
1395
1396
1397;; git mode should only run in the *git status* buffer
1398(put 'git-status-mode 'mode-class 'special)
1399
1400(defun git-status-mode ()
1401  "Major mode for interacting with Git.
1402Commands:
1403\\{git-status-mode-map}"
1404  (kill-all-local-variables)
1405  (buffer-disable-undo)
1406  (setq mode-name "git status"
1407        major-mode 'git-status-mode
1408        goal-column 17
1409        buffer-read-only t)
1410  (use-local-map git-status-mode-map)
1411  (let ((buffer-read-only nil))
1412    (erase-buffer)
1413  (let ((status (ewoc-create 'git-fileinfo-prettyprint "" "")))
1414    (set (make-local-variable 'git-status) status))
1415  (set (make-local-variable 'list-buffers-directory) default-directory)
1416  (make-local-variable 'git-show-uptodate)
1417  (make-local-variable 'git-show-ignored)
1418  (make-local-variable 'git-show-unknown)
1419  (run-hooks 'git-status-mode-hook)))
1420
1421(defun git-find-status-buffer (dir)
1422  "Find the git status buffer handling a specified directory."
1423  (let ((list (buffer-list))
1424        (fulldir (expand-file-name dir))
1425        found)
1426    (while (and list (not found))
1427      (let ((buffer (car list)))
1428        (with-current-buffer buffer
1429          (when (and list-buffers-directory
1430                     (string-equal fulldir (expand-file-name list-buffers-directory))
1431                     (string-match "\\*git-status\\*$" (buffer-name buffer)))
1432            (setq found buffer))))
1433      (setq list (cdr list)))
1434    found))
1435
1436(defun git-status (dir)
1437  "Entry point into git-status mode."
1438  (interactive "DSelect directory: ")
1439  (setq dir (git-get-top-dir dir))
1440  (if (file-directory-p (concat (file-name-as-directory dir) ".git"))
1441      (let ((buffer (or (and git-reuse-status-buffer (git-find-status-buffer dir))
1442                        (create-file-buffer (expand-file-name "*git-status*" dir)))))
1443        (switch-to-buffer buffer)
1444        (cd dir)
1445        (git-status-mode)
1446        (git-refresh-status)
1447        (goto-char (point-min))
1448        (add-hook 'after-save-hook 'git-update-saved-file))
1449    (message "%s is not a git working tree." dir)))
1450
1451(defun git-update-saved-file ()
1452  "Update the corresponding git-status buffer when a file is saved.
1453Meant to be used in `after-save-hook'."
1454  (let* ((file (expand-file-name buffer-file-name))
1455         (dir (condition-case nil (git-get-top-dir (file-name-directory file)) (error nil)))
1456         (buffer (and dir (git-find-status-buffer dir))))
1457    (when buffer
1458      (with-current-buffer buffer
1459        (let ((filename (file-relative-name file dir)))
1460          ; skip files located inside the .git directory
1461          (unless (string-match "^\\.git/" filename)
1462            (git-call-process-env nil nil "add" "--refresh" "--" filename)
1463            (git-update-status-files (list filename) 'uptodate)))))))
1464
1465(defun git-help ()
1466  "Display help for Git mode."
1467  (interactive)
1468  (describe-function 'git-status-mode))
1469
1470(provide 'git)
1471;;; git.el ends here