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contrib / emacs / git.elon commit Merge branch 'jk/noetcconfig' (fef1c4c)
   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;;  - diff against other branch
  39;;  - renaming files from the status buffer
  40;;  - creating tags
  41;;  - fetch/pull
  42;;  - switching branches
  43;;  - revlist browser
  44;;  - git-show-branch browser
  45;;  - menus
  46;;
  47
  48(eval-when-compile (require 'cl))
  49(require 'ewoc)
  50(require 'log-edit)
  51(require 'easymenu)
  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-display-error (&rest args)
 194  "Wrapper for call-process that displays error messages."
 195  (let* ((dir default-directory)
 196         (buffer (get-buffer-create "*Git Command Output*"))
 197         (ok (with-current-buffer buffer
 198               (let ((default-directory dir)
 199                     (buffer-read-only nil))
 200                 (erase-buffer)
 201                 (eq 0 (apply 'call-process "git" nil (list buffer t) nil args))))))
 202    (unless ok (display-message-or-buffer buffer))
 203    ok))
 204
 205(defun git-call-process-env-string (env &rest args)
 206  "Wrapper for call-process that sets environment strings,
 207and returns the process output as a string."
 208  (with-temp-buffer
 209    (and (eq 0 (apply #' git-call-process-env t env args))
 210         (buffer-string))))
 211
 212(defun git-run-process-region (buffer start end program args)
 213  "Run a git process with a buffer region as input."
 214  (let ((output-buffer (current-buffer))
 215        (dir default-directory))
 216    (with-current-buffer buffer
 217      (cd dir)
 218      (apply #'call-process-region start end program
 219             nil (list output-buffer nil) nil args))))
 220
 221(defun git-run-command-buffer (buffer-name &rest args)
 222  "Run a git command, sending the output to a buffer named BUFFER-NAME."
 223  (let ((dir default-directory)
 224        (buffer (get-buffer-create buffer-name)))
 225    (message "Running git %s..." (car args))
 226    (with-current-buffer buffer
 227      (let ((default-directory dir)
 228            (buffer-read-only nil))
 229        (erase-buffer)
 230        (apply #'git-call-process-env buffer nil args)))
 231    (message "Running git %s...done" (car args))
 232    buffer))
 233
 234(defun git-run-command-region (buffer start end env &rest args)
 235  "Run a git command with specified buffer region as input."
 236  (unless (eq 0 (if env
 237                    (git-run-process-region
 238                     buffer start end "env"
 239                     (append (git-get-env-strings env) (list "git") args))
 240                  (git-run-process-region
 241                   buffer start end "git" args)))
 242    (error "Failed to run \"git %s\":\n%s" (mapconcat (lambda (x) x) args " ") (buffer-string))))
 243
 244(defun git-run-hook (hook env &rest args)
 245  "Run a git hook and display its output if any."
 246  (let ((dir default-directory)
 247        (hook-name (expand-file-name (concat ".git/hooks/" hook))))
 248    (or (not (file-executable-p hook-name))
 249        (let (status (buffer (get-buffer-create "*Git Hook Output*")))
 250          (with-current-buffer buffer
 251            (erase-buffer)
 252            (cd dir)
 253            (setq status
 254                  (if env
 255                      (apply #'call-process "env" nil (list buffer t) nil
 256                             (append (git-get-env-strings env) (list hook-name) args))
 257                    (apply #'call-process hook-name nil (list buffer t) nil args))))
 258          (display-message-or-buffer buffer)
 259          (eq 0 status)))))
 260
 261(defun git-get-string-sha1 (string)
 262  "Read a SHA1 from the specified string."
 263  (and string
 264       (string-match "[0-9a-f]\\{40\\}" string)
 265       (match-string 0 string)))
 266
 267(defun git-get-committer-name ()
 268  "Return the name to use as GIT_COMMITTER_NAME."
 269  ; copied from log-edit
 270  (or git-committer-name
 271      (git-config "user.name")
 272      (and (boundp 'add-log-full-name) add-log-full-name)
 273      (and (fboundp 'user-full-name) (user-full-name))
 274      (and (boundp 'user-full-name) user-full-name)))
 275
 276(defun git-get-committer-email ()
 277  "Return the email address to use as GIT_COMMITTER_EMAIL."
 278  ; copied from log-edit
 279  (or git-committer-email
 280      (git-config "user.email")
 281      (and (boundp 'add-log-mailing-address) add-log-mailing-address)
 282      (and (fboundp 'user-mail-address) (user-mail-address))
 283      (and (boundp 'user-mail-address) user-mail-address)))
 284
 285(defun git-get-commits-coding-system ()
 286  "Return the coding system to use for commits."
 287  (let ((repo-config (git-config "i18n.commitencoding")))
 288    (or git-commits-coding-system
 289        (and repo-config
 290             (fboundp 'locale-charset-to-coding-system)
 291             (locale-charset-to-coding-system repo-config))
 292      'utf-8)))
 293
 294(defun git-get-logoutput-coding-system ()
 295  "Return the coding system used for git-log output."
 296  (let ((repo-config (or (git-config "i18n.logoutputencoding")
 297                         (git-config "i18n.commitencoding"))))
 298    (or git-commits-coding-system
 299        (and repo-config
 300             (fboundp 'locale-charset-to-coding-system)
 301             (locale-charset-to-coding-system repo-config))
 302      'utf-8)))
 303
 304(defun git-escape-file-name (name)
 305  "Escape a file name if necessary."
 306  (if (string-match "[\n\t\"\\]" name)
 307      (concat "\""
 308              (mapconcat (lambda (c)
 309                   (case c
 310                     (?\n "\\n")
 311                     (?\t "\\t")
 312                     (?\\ "\\\\")
 313                     (?\" "\\\"")
 314                     (t (char-to-string c))))
 315                 name "")
 316              "\"")
 317    name))
 318
 319(defun git-success-message (text files)
 320  "Print a success message after having handled FILES."
 321  (let ((n (length files)))
 322    (if (equal n 1)
 323        (message "%s %s" text (car files))
 324      (message "%s %d files" text n))))
 325
 326(defun git-get-top-dir (dir)
 327  "Retrieve the top-level directory of a git tree."
 328  (let ((cdup (with-output-to-string
 329                (with-current-buffer standard-output
 330                  (cd dir)
 331                  (unless (eq 0 (call-process "git" nil t nil "rev-parse" "--show-cdup"))
 332                    (error "cannot find top-level git tree for %s." dir))))))
 333    (expand-file-name (concat (file-name-as-directory dir)
 334                              (car (split-string cdup "\n"))))))
 335
 336;stolen from pcl-cvs
 337(defun git-append-to-ignore (file)
 338  "Add a file name to the ignore file in its directory."
 339  (let* ((fullname (expand-file-name file))
 340         (dir (file-name-directory fullname))
 341         (name (file-name-nondirectory fullname))
 342         (ignore-name (expand-file-name git-per-dir-ignore-file dir))
 343         (created (not (file-exists-p ignore-name))))
 344  (save-window-excursion
 345    (set-buffer (find-file-noselect ignore-name))
 346    (goto-char (point-max))
 347    (unless (zerop (current-column)) (insert "\n"))
 348    (insert "/" name "\n")
 349    (sort-lines nil (point-min) (point-max))
 350    (save-buffer))
 351  (when created
 352    (git-call-process-env nil nil "update-index" "--add" "--" (file-relative-name ignore-name)))
 353  (git-update-status-files (list (file-relative-name ignore-name)) 'unknown)))
 354
 355; propertize definition for XEmacs, stolen from erc-compat
 356(eval-when-compile
 357  (unless (fboundp 'propertize)
 358    (defun propertize (string &rest props)
 359      (let ((string (copy-sequence string)))
 360        (while props
 361          (put-text-property 0 (length string) (nth 0 props) (nth 1 props) string)
 362          (setq props (cddr props)))
 363        string))))
 364
 365;;;; Wrappers for basic git commands
 366;;;; ------------------------------------------------------------
 367
 368(defun git-rev-parse (rev)
 369  "Parse a revision name and return its SHA1."
 370  (git-get-string-sha1
 371   (git-call-process-env-string nil "rev-parse" rev)))
 372
 373(defun git-config (key)
 374  "Retrieve the value associated to KEY in the git repository config file."
 375  (let ((str (git-call-process-env-string nil "config" key)))
 376    (and str (car (split-string str "\n")))))
 377
 378(defun git-symbolic-ref (ref)
 379  "Wrapper for the git-symbolic-ref command."
 380  (let ((str (git-call-process-env-string nil "symbolic-ref" ref)))
 381    (and str (car (split-string str "\n")))))
 382
 383(defun git-update-ref (ref newval &optional oldval reason)
 384  "Update a reference by calling git-update-ref."
 385  (let ((args (and oldval (list oldval))))
 386    (push newval args)
 387    (push ref args)
 388    (when reason
 389     (push reason args)
 390     (push "-m" args))
 391    (apply 'git-call-process-display-error "update-ref" args)))
 392
 393(defun git-read-tree (tree &optional index-file)
 394  "Read a tree into the index file."
 395  (apply #'git-call-process-env nil
 396         (if index-file `(("GIT_INDEX_FILE" . ,index-file)) nil)
 397         "read-tree" (if tree (list tree))))
 398
 399(defun git-write-tree (&optional index-file)
 400  "Call git-write-tree and return the resulting tree SHA1 as a string."
 401  (git-get-string-sha1
 402   (git-call-process-env-string (and index-file `(("GIT_INDEX_FILE" . ,index-file))) "write-tree")))
 403
 404(defun git-commit-tree (buffer tree head)
 405  "Call git-commit-tree with buffer as input and return the resulting commit SHA1."
 406  (let ((author-name (git-get-committer-name))
 407        (author-email (git-get-committer-email))
 408        (subject "commit (initial): ")
 409        author-date log-start log-end args coding-system-for-write)
 410    (when head
 411      (setq subject "commit: ")
 412      (push "-p" args)
 413      (push head args))
 414    (with-current-buffer buffer
 415      (goto-char (point-min))
 416      (if
 417          (setq log-start (re-search-forward (concat "^" (regexp-quote git-log-msg-separator) "\n") nil t))
 418          (save-restriction
 419            (narrow-to-region (point-min) log-start)
 420            (goto-char (point-min))
 421            (when (re-search-forward "^Author: +\\(.*?\\) *<\\(.*\\)> *$" nil t)
 422              (setq author-name (match-string 1)
 423                    author-email (match-string 2)))
 424            (goto-char (point-min))
 425            (when (re-search-forward "^Date: +\\(.*\\)$" nil t)
 426              (setq author-date (match-string 1)))
 427            (goto-char (point-min))
 428            (while (re-search-forward "^Parent: +\\([0-9a-f]+\\)" nil t)
 429              (unless (string-equal head (match-string 1))
 430                (setq subject "commit (merge): ")
 431                (push "-p" args)
 432                (push (match-string 1) args))))
 433        (setq log-start (point-min)))
 434      (setq log-end (point-max))
 435      (goto-char log-start)
 436      (when (re-search-forward ".*$" nil t)
 437        (setq subject (concat subject (match-string 0))))
 438      (setq coding-system-for-write buffer-file-coding-system))
 439    (let ((commit
 440           (git-get-string-sha1
 441            (with-output-to-string
 442              (with-current-buffer standard-output
 443                (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
 444                             ("GIT_AUTHOR_EMAIL" . ,author-email)
 445                             ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
 446                             ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
 447                  (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
 448                  (apply #'git-run-command-region
 449                         buffer log-start log-end env
 450                         "commit-tree" tree (nreverse args))))))))
 451      (and (git-update-ref "HEAD" commit head subject)
 452           commit))))
 453
 454(defun git-empty-db-p ()
 455  "Check if the git db is empty (no commit done yet)."
 456  (not (eq 0 (call-process "git" nil nil nil "rev-parse" "--verify" "HEAD"))))
 457
 458(defun git-get-merge-heads ()
 459  "Retrieve the merge heads from the MERGE_HEAD file if present."
 460  (let (heads)
 461    (when (file-readable-p ".git/MERGE_HEAD")
 462      (with-temp-buffer
 463        (insert-file-contents ".git/MERGE_HEAD" nil nil nil t)
 464        (goto-char (point-min))
 465        (while (re-search-forward "[0-9a-f]\\{40\\}" nil t)
 466          (push (match-string 0) heads))))
 467    (nreverse heads)))
 468
 469(defun git-get-commit-description (commit)
 470  "Get a one-line description of COMMIT."
 471  (let ((coding-system-for-read (git-get-logoutput-coding-system)))
 472    (let ((descr (git-call-process-env-string nil "log" "--max-count=1" "--pretty=oneline" commit)))
 473      (if (and descr (string-match "\\`\\([0-9a-f]\\{40\\}\\) *\\(.*\\)$" descr))
 474          (concat (substring (match-string 1 descr) 0 10) " - " (match-string 2 descr))
 475        descr))))
 476
 477;;;; File info structure
 478;;;; ------------------------------------------------------------
 479
 480; fileinfo structure stolen from pcl-cvs
 481(defstruct (git-fileinfo
 482            (:copier nil)
 483            (:constructor git-create-fileinfo (state name &optional old-perm new-perm rename-state orig-name marked))
 484            (:conc-name git-fileinfo->))
 485  marked              ;; t/nil
 486  state               ;; current state
 487  name                ;; file name
 488  old-perm new-perm   ;; permission flags
 489  rename-state        ;; rename or copy state
 490  orig-name           ;; original name for renames or copies
 491  needs-refresh)      ;; whether file needs to be refreshed
 492
 493(defvar git-status nil)
 494
 495(defun git-clear-status (status)
 496  "Remove everything from the status list."
 497  (ewoc-filter status (lambda (info) nil)))
 498
 499(defun git-set-fileinfo-state (info state)
 500  "Set the state of a file info."
 501  (unless (eq (git-fileinfo->state info) state)
 502    (setf (git-fileinfo->state info) state
 503          (git-fileinfo->new-perm info) (git-fileinfo->old-perm info)
 504          (git-fileinfo->rename-state info) nil
 505          (git-fileinfo->orig-name info) nil
 506          (git-fileinfo->needs-refresh info) t)))
 507
 508(defun git-status-filenames-map (status func files &rest args)
 509  "Apply FUNC to the status files names in the FILES list."
 510  (when files
 511    (setq files (sort files #'string-lessp))
 512    (let ((file (pop files))
 513          (node (ewoc-nth status 0)))
 514      (while (and file node)
 515        (let ((info (ewoc-data node)))
 516          (if (string-lessp (git-fileinfo->name info) file)
 517              (setq node (ewoc-next status node))
 518            (if (string-equal (git-fileinfo->name info) file)
 519                (apply func info args))
 520            (setq file (pop files))))))))
 521
 522(defun git-set-filenames-state (status files state)
 523  "Set the state of a list of named files."
 524  (when files
 525    (git-status-filenames-map status #'git-set-fileinfo-state files state)
 526    (unless state  ;; delete files whose state has been set to nil
 527      (ewoc-filter status (lambda (info) (git-fileinfo->state info))))))
 528
 529(defun git-state-code (code)
 530  "Convert from a string to a added/deleted/modified state."
 531  (case (string-to-char code)
 532    (?M 'modified)
 533    (?? 'unknown)
 534    (?A 'added)
 535    (?D 'deleted)
 536    (?U 'unmerged)
 537    (?T 'modified)
 538    (t nil)))
 539
 540(defun git-status-code-as-string (code)
 541  "Format a git status code as string."
 542  (case code
 543    ('modified (propertize "Modified" 'face 'git-status-face))
 544    ('unknown  (propertize "Unknown " 'face 'git-unknown-face))
 545    ('added    (propertize "Added   " 'face 'git-status-face))
 546    ('deleted  (propertize "Deleted " 'face 'git-status-face))
 547    ('unmerged (propertize "Unmerged" 'face 'git-unmerged-face))
 548    ('uptodate (propertize "Uptodate" 'face 'git-uptodate-face))
 549    ('ignored  (propertize "Ignored " 'face 'git-ignored-face))
 550    (t "?       ")))
 551
 552(defun git-file-type-as-string (old-perm new-perm)
 553  "Return a string describing the file type based on its permissions."
 554  (let* ((old-type (lsh (or old-perm 0) -9))
 555         (new-type (lsh (or new-perm 0) -9))
 556         (str (case new-type
 557                (?\100  ;; file
 558                 (case old-type
 559                   (?\100 nil)
 560                   (?\120 "   (type change symlink -> file)")
 561                   (?\160 "   (type change subproject -> file)")))
 562                 (?\120  ;; symlink
 563                  (case old-type
 564                    (?\100 "   (type change file -> symlink)")
 565                    (?\160 "   (type change subproject -> symlink)")
 566                    (t "   (symlink)")))
 567                  (?\160  ;; subproject
 568                   (case old-type
 569                     (?\100 "   (type change file -> subproject)")
 570                     (?\120 "   (type change symlink -> subproject)")
 571                     (t "   (subproject)")))
 572                  (?\110 nil)  ;; directory (internal, not a real git state)
 573                  (?\000  ;; deleted or unknown
 574                   (case old-type
 575                     (?\120 "   (symlink)")
 576                     (?\160 "   (subproject)")))
 577                  (t (format "   (unknown type %o)" new-type)))))
 578    (cond (str (propertize str 'face 'git-status-face))
 579          ((eq new-type ?\110) "/")
 580          (t ""))))
 581
 582(defun git-rename-as-string (info)
 583  "Return a string describing the copy or rename associated with INFO, or an empty string if none."
 584  (let ((state (git-fileinfo->rename-state info)))
 585    (if state
 586        (propertize
 587         (concat "   ("
 588                 (if (eq state 'copy) "copied from "
 589                   (if (eq (git-fileinfo->state info) 'added) "renamed from "
 590                     "renamed to "))
 591                 (git-escape-file-name (git-fileinfo->orig-name info))
 592                 ")") 'face 'git-status-face)
 593      "")))
 594
 595(defun git-permissions-as-string (old-perm new-perm)
 596  "Format a permission change as string."
 597  (propertize
 598   (if (or (not old-perm)
 599           (not new-perm)
 600           (eq 0 (logand ?\111 (logxor old-perm new-perm))))
 601       "  "
 602     (if (eq 0 (logand ?\111 old-perm)) "+x" "-x"))
 603  'face 'git-permission-face))
 604
 605(defun git-fileinfo-prettyprint (info)
 606  "Pretty-printer for the git-fileinfo structure."
 607  (let ((old-perm (git-fileinfo->old-perm info))
 608        (new-perm (git-fileinfo->new-perm info)))
 609    (insert (concat "   " (if (git-fileinfo->marked info) (propertize "*" 'face 'git-mark-face) " ")
 610                    " " (git-status-code-as-string (git-fileinfo->state info))
 611                    " " (git-permissions-as-string old-perm new-perm)
 612                    "  " (git-escape-file-name (git-fileinfo->name info))
 613                    (git-file-type-as-string old-perm new-perm)
 614                    (git-rename-as-string info)))))
 615
 616(defun git-insert-info-list (status infolist)
 617  "Insert a list of file infos in the status buffer, replacing existing ones if any."
 618  (setq infolist (sort infolist
 619                       (lambda (info1 info2)
 620                         (string-lessp (git-fileinfo->name info1)
 621                                       (git-fileinfo->name info2)))))
 622  (let ((info (pop infolist))
 623        (node (ewoc-nth status 0)))
 624    (while info
 625      (cond ((not node)
 626             (setq node (ewoc-enter-last status info))
 627             (setq info (pop infolist)))
 628            ((string-lessp (git-fileinfo->name (ewoc-data node))
 629                           (git-fileinfo->name info))
 630             (setq node (ewoc-next status node)))
 631            ((string-equal (git-fileinfo->name (ewoc-data node))
 632                           (git-fileinfo->name info))
 633              ;; preserve the marked flag
 634              (setf (git-fileinfo->marked info) (git-fileinfo->marked (ewoc-data node)))
 635              (setf (git-fileinfo->needs-refresh info) t)
 636              (setf (ewoc-data node) info)
 637              (setq info (pop infolist)))
 638            (t
 639             (setq node (ewoc-enter-before status node info))
 640             (setq info (pop infolist)))))))
 641
 642(defun git-run-diff-index (status files)
 643  "Run git-diff-index on FILES and parse the results into STATUS.
 644Return the list of files that haven't been handled."
 645  (let ((remaining (copy-sequence files))
 646        infolist)
 647    (with-temp-buffer
 648      (apply #'git-call-process-env t nil "diff-index" "-z" "-M" "HEAD" "--" files)
 649      (goto-char (point-min))
 650      (while (re-search-forward
 651              ":\\([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"
 652              nil t 1)
 653        (let ((old-perm (string-to-number (match-string 1) 8))
 654              (new-perm (string-to-number (match-string 2) 8))
 655              (state (or (match-string 4) (match-string 6)))
 656              (name (or (match-string 5) (match-string 7)))
 657              (new-name (match-string 8)))
 658          (if new-name  ; copy or rename
 659              (if (eq ?C (string-to-char state))
 660                  (push (git-create-fileinfo 'added new-name old-perm new-perm 'copy name) infolist)
 661                (push (git-create-fileinfo 'deleted name 0 0 'rename new-name) infolist)
 662                (push (git-create-fileinfo 'added new-name old-perm new-perm 'rename name) infolist))
 663            (push (git-create-fileinfo (git-state-code state) name old-perm new-perm) infolist))
 664          (setq remaining (delete name remaining))
 665          (when new-name (setq remaining (delete new-name remaining))))))
 666    (git-insert-info-list status infolist)
 667    remaining))
 668
 669(defun git-find-status-file (status file)
 670  "Find a given file in the status ewoc and return its node."
 671  (let ((node (ewoc-nth status 0)))
 672    (while (and node (not (string= file (git-fileinfo->name (ewoc-data node)))))
 673      (setq node (ewoc-next status node)))
 674    node))
 675
 676(defun git-run-ls-files (status files default-state &rest options)
 677  "Run git-ls-files on FILES and parse the results into STATUS.
 678Return the list of files that haven't been handled."
 679  (let (infolist)
 680    (with-temp-buffer
 681      (apply #'git-call-process-env t nil "ls-files" "-z" (append options (list "--") files))
 682      (goto-char (point-min))
 683      (while (re-search-forward "\\([^\0]*?\\)\\(/?\\)\0" nil t 1)
 684        (let ((name (match-string 1)))
 685          (push (git-create-fileinfo default-state name 0
 686                                     (if (string-equal "/" (match-string 2)) (lsh ?\110 9) 0))
 687                infolist)
 688          (setq files (delete name files)))))
 689    (git-insert-info-list status infolist)
 690    files))
 691
 692(defun git-run-ls-files-cached (status files default-state)
 693  "Run git-ls-files -c on FILES and parse the results into STATUS.
 694Return the list of files that haven't been handled."
 695  (let ((remaining (copy-sequence files))
 696        infolist)
 697    (with-temp-buffer
 698      (apply #'git-call-process-env t nil "ls-files" "-z" "-s" "-c" "--" files)
 699      (goto-char (point-min))
 700      (while (re-search-forward "\\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} 0\t\\([^\0]+\\)\0" nil t)
 701        (let* ((new-perm (string-to-number (match-string 1) 8))
 702               (old-perm (if (eq default-state 'added) 0 new-perm))
 703               (name (match-string 2)))
 704          (push (git-create-fileinfo default-state name old-perm new-perm) infolist)
 705          (setq remaining (delete name remaining)))))
 706    (git-insert-info-list status infolist)
 707    remaining))
 708
 709(defun git-run-ls-unmerged (status files)
 710  "Run git-ls-files -u on FILES and parse the results into STATUS."
 711  (with-temp-buffer
 712    (apply #'git-call-process-env t nil "ls-files" "-z" "-u" "--" files)
 713    (goto-char (point-min))
 714    (let (unmerged-files)
 715      (while (re-search-forward "[0-7]\\{6\\} [0-9a-f]\\{40\\} [123]\t\\([^\0]+\\)\0" nil t)
 716        (push (match-string 1) unmerged-files))
 717      (git-set-filenames-state status unmerged-files 'unmerged))))
 718
 719(defun git-get-exclude-files ()
 720  "Get the list of exclude files to pass to git-ls-files."
 721  (let (files
 722        (config (git-config "core.excludesfile")))
 723    (when (file-readable-p ".git/info/exclude")
 724      (push ".git/info/exclude" files))
 725    (when (and config (file-readable-p config))
 726      (push config files))
 727    files))
 728
 729(defun git-run-ls-files-with-excludes (status files default-state &rest options)
 730  "Run git-ls-files on FILES with appropriate --exclude-from options."
 731  (let ((exclude-files (git-get-exclude-files)))
 732    (apply #'git-run-ls-files status files default-state "--directory"
 733           (concat "--exclude-per-directory=" git-per-dir-ignore-file)
 734           (append options (mapcar (lambda (f) (concat "--exclude-from=" f)) exclude-files)))))
 735
 736(defun git-update-status-files (files &optional default-state)
 737  "Update the status of FILES from the index."
 738  (unless git-status (error "Not in git-status buffer."))
 739  (when (or git-show-uptodate files)
 740    (git-run-ls-files-cached git-status files 'uptodate))
 741  (let* ((remaining-files
 742          (if (git-empty-db-p) ; we need some special handling for an empty db
 743              (git-run-ls-files-cached git-status files 'added)
 744            (git-run-diff-index git-status files))))
 745    (git-run-ls-unmerged git-status files)
 746    (when (or remaining-files (and git-show-unknown (not files)))
 747      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'unknown "-o")))
 748    (when (or remaining-files (and git-show-ignored (not files)))
 749      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'ignored "-o" "-i")))
 750    (git-set-filenames-state git-status remaining-files default-state)
 751    (git-refresh-files)
 752    (git-refresh-ewoc-hf git-status)))
 753
 754(defun git-mark-files (status files)
 755  "Mark all the specified FILES, and unmark the others."
 756  (setq files (sort files #'string-lessp))
 757  (let ((file (and files (pop files)))
 758        (node (ewoc-nth status 0)))
 759    (while node
 760      (let ((info (ewoc-data node)))
 761        (if (and file (string-equal (git-fileinfo->name info) file))
 762            (progn
 763              (unless (git-fileinfo->marked info)
 764                (setf (git-fileinfo->marked info) t)
 765                (setf (git-fileinfo->needs-refresh info) t))
 766              (setq file (pop files))
 767              (setq node (ewoc-next status node)))
 768          (when (git-fileinfo->marked info)
 769            (setf (git-fileinfo->marked info) nil)
 770            (setf (git-fileinfo->needs-refresh info) t))
 771          (if (and file (string-lessp file (git-fileinfo->name info)))
 772              (setq file (pop files))
 773            (setq node (ewoc-next status node))))))))
 774
 775(defun git-marked-files ()
 776  "Return a list of all marked files, or if none a list containing just the file at cursor position."
 777  (unless git-status (error "Not in git-status buffer."))
 778  (or (ewoc-collect git-status (lambda (info) (git-fileinfo->marked info)))
 779      (list (ewoc-data (ewoc-locate git-status)))))
 780
 781(defun git-marked-files-state (&rest states)
 782  "Return marked files that are in the specified states."
 783  (let ((files (git-marked-files))
 784        result)
 785    (dolist (info files)
 786      (when (memq (git-fileinfo->state info) states)
 787        (push info result)))
 788    result))
 789
 790(defun git-refresh-files ()
 791  "Refresh all files that need it and clear the needs-refresh flag."
 792  (unless git-status (error "Not in git-status buffer."))
 793  (ewoc-map
 794   (lambda (info)
 795     (let ((refresh (git-fileinfo->needs-refresh info)))
 796       (setf (git-fileinfo->needs-refresh info) nil)
 797       refresh))
 798   git-status)
 799  ; move back to goal column
 800  (when goal-column (move-to-column goal-column)))
 801
 802(defun git-refresh-ewoc-hf (status)
 803  "Refresh the ewoc header and footer."
 804  (let ((branch (git-symbolic-ref "HEAD"))
 805        (head (if (git-empty-db-p) "Nothing committed yet"
 806                (git-get-commit-description "HEAD")))
 807        (merge-heads (git-get-merge-heads)))
 808    (ewoc-set-hf status
 809                 (format "Directory:  %s\nBranch:     %s\nHead:       %s%s\n"
 810                         default-directory
 811                         (if branch
 812                             (if (string-match "^refs/heads/" branch)
 813                                 (substring branch (match-end 0))
 814                               branch)
 815                           "none (detached HEAD)")
 816                         head
 817                         (if merge-heads
 818                             (concat "\nMerging:    "
 819                                     (mapconcat (lambda (str) (git-get-commit-description str)) merge-heads "\n            "))
 820                           ""))
 821                 (if (ewoc-nth status 0) "" "    No changes."))))
 822
 823(defun git-get-filenames (files)
 824  (mapcar (lambda (info) (git-fileinfo->name info)) files))
 825
 826(defun git-update-index (index-file files)
 827  "Run git-update-index on a list of files."
 828  (let ((env (and index-file `(("GIT_INDEX_FILE" . ,index-file))))
 829        added deleted modified)
 830    (dolist (info files)
 831      (case (git-fileinfo->state info)
 832        ('added (push info added))
 833        ('deleted (push info deleted))
 834        ('modified (push info modified))))
 835    (when added
 836      (apply #'git-call-process-env nil env "update-index" "--add" "--" (git-get-filenames added)))
 837    (when deleted
 838      (apply #'git-call-process-env nil env "update-index" "--remove" "--" (git-get-filenames deleted)))
 839    (when modified
 840      (apply #'git-call-process-env nil env "update-index" "--" (git-get-filenames modified)))))
 841
 842(defun git-run-pre-commit-hook ()
 843  "Run the pre-commit hook if any."
 844  (unless git-status (error "Not in git-status buffer."))
 845  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
 846    (or (not files)
 847        (not (file-executable-p ".git/hooks/pre-commit"))
 848        (let ((index-file (make-temp-file "gitidx")))
 849          (unwind-protect
 850            (let ((head-tree (unless (git-empty-db-p) (git-rev-parse "HEAD^{tree}"))))
 851              (git-read-tree head-tree index-file)
 852              (git-update-index index-file files)
 853              (git-run-hook "pre-commit" `(("GIT_INDEX_FILE" . ,index-file))))
 854          (delete-file index-file))))))
 855
 856(defun git-do-commit ()
 857  "Perform the actual commit using the current buffer as log message."
 858  (interactive)
 859  (let ((buffer (current-buffer))
 860        (index-file (make-temp-file "gitidx")))
 861    (with-current-buffer log-edit-parent-buffer
 862      (if (git-marked-files-state 'unmerged)
 863          (message "You cannot commit unmerged files, resolve them first.")
 864        (unwind-protect
 865            (let ((files (git-marked-files-state 'added 'deleted 'modified))
 866                  head head-tree)
 867              (unless (git-empty-db-p)
 868                (setq head (git-rev-parse "HEAD")
 869                      head-tree (git-rev-parse "HEAD^{tree}")))
 870              (if files
 871                  (progn
 872                    (message "Running git commit...")
 873                    (git-read-tree head-tree index-file)
 874                    (git-update-index nil files)         ;update both the default index
 875                    (git-update-index index-file files)  ;and the temporary one
 876                    (let ((tree (git-write-tree index-file)))
 877                      (if (or (not (string-equal tree head-tree))
 878                              (yes-or-no-p "The tree was not modified, do you really want to perform an empty commit? "))
 879                          (let ((commit (git-commit-tree buffer tree head)))
 880                            (when commit
 881                              (condition-case nil (delete-file ".git/MERGE_HEAD") (error nil))
 882                              (condition-case nil (delete-file ".git/MERGE_MSG") (error nil))
 883                              (with-current-buffer buffer (erase-buffer))
 884                              (git-update-status-files (git-get-filenames files) 'uptodate)
 885                              (git-call-process-env nil nil "rerere")
 886                              (git-call-process-env nil nil "gc" "--auto")
 887                              (git-refresh-files)
 888                              (git-refresh-ewoc-hf git-status)
 889                              (message "Committed %s." commit)
 890                              (git-run-hook "post-commit" nil)))
 891                        (message "Commit aborted."))))
 892                (message "No files to commit.")))
 893          (delete-file index-file))))))
 894
 895
 896;;;; Interactive functions
 897;;;; ------------------------------------------------------------
 898
 899(defun git-mark-file ()
 900  "Mark the file that the cursor is on and move to the next one."
 901  (interactive)
 902  (unless git-status (error "Not in git-status buffer."))
 903  (let* ((pos (ewoc-locate git-status))
 904         (info (ewoc-data pos)))
 905    (setf (git-fileinfo->marked info) t)
 906    (ewoc-invalidate git-status pos)
 907    (ewoc-goto-next git-status 1)))
 908
 909(defun git-unmark-file ()
 910  "Unmark the file that the cursor is on and move to the next one."
 911  (interactive)
 912  (unless git-status (error "Not in git-status buffer."))
 913  (let* ((pos (ewoc-locate git-status))
 914         (info (ewoc-data pos)))
 915    (setf (git-fileinfo->marked info) nil)
 916    (ewoc-invalidate git-status pos)
 917    (ewoc-goto-next git-status 1)))
 918
 919(defun git-unmark-file-up ()
 920  "Unmark the file that the cursor is on and move to the previous one."
 921  (interactive)
 922  (unless git-status (error "Not in git-status buffer."))
 923  (let* ((pos (ewoc-locate git-status))
 924         (info (ewoc-data pos)))
 925    (setf (git-fileinfo->marked info) nil)
 926    (ewoc-invalidate git-status pos)
 927    (ewoc-goto-prev git-status 1)))
 928
 929(defun git-mark-all ()
 930  "Mark all files."
 931  (interactive)
 932  (unless git-status (error "Not in git-status buffer."))
 933  (ewoc-map (lambda (info) (unless (git-fileinfo->marked info)
 934                             (setf (git-fileinfo->marked info) t))) git-status)
 935  ; move back to goal column after invalidate
 936  (when goal-column (move-to-column goal-column)))
 937
 938(defun git-unmark-all ()
 939  "Unmark all files."
 940  (interactive)
 941  (unless git-status (error "Not in git-status buffer."))
 942  (ewoc-map (lambda (info) (when (git-fileinfo->marked info)
 943                             (setf (git-fileinfo->marked info) nil)
 944                             t)) git-status)
 945  ; move back to goal column after invalidate
 946  (when goal-column (move-to-column goal-column)))
 947
 948(defun git-toggle-all-marks ()
 949  "Toggle all file marks."
 950  (interactive)
 951  (unless git-status (error "Not in git-status buffer."))
 952  (ewoc-map (lambda (info) (setf (git-fileinfo->marked info) (not (git-fileinfo->marked info))) t) git-status)
 953  ; move back to goal column after invalidate
 954  (when goal-column (move-to-column goal-column)))
 955
 956(defun git-next-file (&optional n)
 957  "Move the selection down N files."
 958  (interactive "p")
 959  (unless git-status (error "Not in git-status buffer."))
 960  (ewoc-goto-next git-status n))
 961
 962(defun git-prev-file (&optional n)
 963  "Move the selection up N files."
 964  (interactive "p")
 965  (unless git-status (error "Not in git-status buffer."))
 966  (ewoc-goto-prev git-status n))
 967
 968(defun git-next-unmerged-file (&optional n)
 969  "Move the selection down N unmerged files."
 970  (interactive "p")
 971  (unless git-status (error "Not in git-status buffer."))
 972  (let* ((last (ewoc-locate git-status))
 973         (node (ewoc-next git-status last)))
 974    (while (and node (> n 0))
 975      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 976        (setq n (1- n))
 977        (setq last node))
 978      (setq node (ewoc-next git-status node)))
 979    (ewoc-goto-node git-status last)))
 980
 981(defun git-prev-unmerged-file (&optional n)
 982  "Move the selection up N unmerged files."
 983  (interactive "p")
 984  (unless git-status (error "Not in git-status buffer."))
 985  (let* ((last (ewoc-locate git-status))
 986         (node (ewoc-prev git-status last)))
 987    (while (and node (> n 0))
 988      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 989        (setq n (1- n))
 990        (setq last node))
 991      (setq node (ewoc-prev git-status node)))
 992    (ewoc-goto-node git-status last)))
 993
 994(defun git-add-file ()
 995  "Add marked file(s) to the index cache."
 996  (interactive)
 997  (let ((files (git-get-filenames (git-marked-files-state 'unknown 'ignored))))
 998    ;; FIXME: add support for directories
 999    (unless files
1000      (push (file-relative-name (read-file-name "File to add: " nil nil t)) files))
1001    (when (apply 'git-call-process-display-error "update-index" "--add" "--" files)
1002      (git-update-status-files files 'uptodate)
1003      (git-success-message "Added" files))))
1004
1005(defun git-ignore-file ()
1006  "Add marked file(s) to the ignore list."
1007  (interactive)
1008  (let ((files (git-get-filenames (git-marked-files-state 'unknown))))
1009    (unless files
1010      (push (file-relative-name (read-file-name "File to ignore: " nil nil t)) files))
1011    (dolist (f files) (git-append-to-ignore f))
1012    (git-update-status-files files 'ignored)
1013    (git-success-message "Ignored" files)))
1014
1015(defun git-remove-file ()
1016  "Remove the marked file(s)."
1017  (interactive)
1018  (let ((files (git-get-filenames (git-marked-files-state 'added 'modified 'unknown 'uptodate 'ignored))))
1019    (unless files
1020      (push (file-relative-name (read-file-name "File to remove: " nil nil t)) files))
1021    (if (yes-or-no-p
1022         (format "Remove %d file%s? " (length files) (if (> (length files) 1) "s" "")))
1023        (progn
1024          (dolist (name files)
1025            (ignore-errors
1026              (if (file-directory-p name)
1027                  (delete-directory name)
1028                (delete-file name))))
1029          (when (apply 'git-call-process-display-error "update-index" "--remove" "--" files)
1030            (git-update-status-files files nil)
1031            (git-success-message "Removed" files)))
1032      (message "Aborting"))))
1033
1034(defun git-revert-file ()
1035  "Revert changes to the marked file(s)."
1036  (interactive)
1037  (let ((files (git-marked-files-state 'added 'deleted 'modified 'unmerged))
1038        added modified)
1039    (when (and files
1040               (yes-or-no-p
1041                (format "Revert %d file%s? " (length files) (if (> (length files) 1) "s" ""))))
1042      (dolist (info files)
1043        (case (git-fileinfo->state info)
1044          ('added (push (git-fileinfo->name info) added))
1045          ('deleted (push (git-fileinfo->name info) modified))
1046          ('unmerged (push (git-fileinfo->name info) modified))
1047          ('modified (push (git-fileinfo->name info) modified))))
1048      ;; check if a buffer contains one of the files and isn't saved
1049      (dolist (file modified)
1050        (let ((buffer (get-file-buffer file)))
1051          (when (and buffer (buffer-modified-p buffer))
1052            (error "Buffer %s is modified. Please kill or save modified buffers before reverting." (buffer-name buffer)))))
1053      (let ((ok (and
1054                 (or (not added)
1055                     (apply 'git-call-process-display-error "update-index" "--force-remove" "--" added))
1056                 (or (not modified)
1057                     (apply 'git-call-process-display-error "checkout" "HEAD" modified)))))
1058        (git-update-status-files (append added modified) 'uptodate)
1059        (when ok
1060          (dolist (file modified)
1061            (let ((buffer (get-file-buffer file)))
1062              (when buffer (with-current-buffer buffer (revert-buffer t t t)))))
1063          (git-success-message "Reverted" (git-get-filenames files)))))))
1064
1065(defun git-resolve-file ()
1066  "Resolve conflicts in marked file(s)."
1067  (interactive)
1068  (let ((files (git-get-filenames (git-marked-files-state 'unmerged))))
1069    (when files
1070      (when (apply 'git-call-process-display-error "update-index" "--" files)
1071        (git-update-status-files files 'uptodate)
1072        (git-success-message "Resolved" files)))))
1073
1074(defun git-remove-handled ()
1075  "Remove handled files from the status list."
1076  (interactive)
1077  (ewoc-filter git-status
1078               (lambda (info)
1079                 (case (git-fileinfo->state info)
1080                   ('ignored git-show-ignored)
1081                   ('uptodate git-show-uptodate)
1082                   ('unknown git-show-unknown)
1083                   (t t))))
1084  (unless (ewoc-nth git-status 0)  ; refresh header if list is empty
1085    (git-refresh-ewoc-hf git-status)))
1086
1087(defun git-toggle-show-uptodate ()
1088  "Toogle the option for showing up-to-date files."
1089  (interactive)
1090  (if (setq git-show-uptodate (not git-show-uptodate))
1091      (git-refresh-status)
1092    (git-remove-handled)))
1093
1094(defun git-toggle-show-ignored ()
1095  "Toogle the option for showing ignored files."
1096  (interactive)
1097  (if (setq git-show-ignored (not git-show-ignored))
1098      (progn
1099        (message "Inserting ignored files...")
1100        (git-run-ls-files-with-excludes git-status nil 'ignored "-o" "-i")
1101        (git-refresh-files)
1102        (git-refresh-ewoc-hf git-status)
1103        (message "Inserting ignored files...done"))
1104    (git-remove-handled)))
1105
1106(defun git-toggle-show-unknown ()
1107  "Toogle the option for showing unknown files."
1108  (interactive)
1109  (if (setq git-show-unknown (not git-show-unknown))
1110      (progn
1111        (message "Inserting unknown files...")
1112        (git-run-ls-files-with-excludes git-status nil 'unknown "-o")
1113        (git-refresh-files)
1114        (git-refresh-ewoc-hf git-status)
1115        (message "Inserting unknown files...done"))
1116    (git-remove-handled)))
1117
1118(defun git-expand-directory (info)
1119  "Expand the directory represented by INFO to list its files."
1120  (when (eq (lsh (git-fileinfo->new-perm info) -9) ?\110)
1121    (let ((dir (git-fileinfo->name info)))
1122      (git-set-filenames-state git-status (list dir) nil)
1123      (git-run-ls-files-with-excludes git-status (list (concat dir "/")) 'unknown "-o")
1124      (git-refresh-files)
1125      (git-refresh-ewoc-hf git-status)
1126      t)))
1127
1128(defun git-setup-diff-buffer (buffer)
1129  "Setup a buffer for displaying a diff."
1130  (let ((dir default-directory))
1131    (with-current-buffer buffer
1132      (diff-mode)
1133      (goto-char (point-min))
1134      (setq default-directory dir)
1135      (setq buffer-read-only t)))
1136  (display-buffer buffer)
1137  ; shrink window only if it displays the status buffer
1138  (when (eq (window-buffer) (current-buffer))
1139    (shrink-window-if-larger-than-buffer)))
1140
1141(defun git-diff-file ()
1142  "Diff the marked file(s) against HEAD."
1143  (interactive)
1144  (let ((files (git-marked-files)))
1145    (git-setup-diff-buffer
1146     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M" "HEAD" "--" (git-get-filenames files)))))
1147
1148(defun git-diff-file-merge-head (arg)
1149  "Diff the marked file(s) against the first merge head (or the nth one with a numeric prefix)."
1150  (interactive "p")
1151  (let ((files (git-marked-files))
1152        (merge-heads (git-get-merge-heads)))
1153    (unless merge-heads (error "No merge in progress"))
1154    (git-setup-diff-buffer
1155     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M"
1156            (or (nth (1- arg) merge-heads) "HEAD") "--" (git-get-filenames files)))))
1157
1158(defun git-diff-unmerged-file (stage)
1159  "Diff the marked unmerged file(s) against the specified stage."
1160  (let ((files (git-marked-files)))
1161    (git-setup-diff-buffer
1162     (apply #'git-run-command-buffer "*git-diff*" "diff-files" "-p" stage "--" (git-get-filenames files)))))
1163
1164(defun git-diff-file-base ()
1165  "Diff the marked unmerged file(s) against the common base file."
1166  (interactive)
1167  (git-diff-unmerged-file "-1"))
1168
1169(defun git-diff-file-mine ()
1170  "Diff the marked unmerged file(s) against my pre-merge version."
1171  (interactive)
1172  (git-diff-unmerged-file "-2"))
1173
1174(defun git-diff-file-other ()
1175  "Diff the marked unmerged file(s) against the other's pre-merge version."
1176  (interactive)
1177  (git-diff-unmerged-file "-3"))
1178
1179(defun git-diff-file-combined ()
1180  "Do a combined diff of the marked unmerged file(s)."
1181  (interactive)
1182  (git-diff-unmerged-file "-c"))
1183
1184(defun git-diff-file-idiff ()
1185  "Perform an interactive diff on the current file."
1186  (interactive)
1187  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
1188    (unless (eq 1 (length files))
1189      (error "Cannot perform an interactive diff on multiple files."))
1190    (let* ((filename (car (git-get-filenames files)))
1191           (buff1 (find-file-noselect filename))
1192           (buff2 (git-run-command-buffer (concat filename ".~HEAD~") "cat-file" "blob" (concat "HEAD:" filename))))
1193      (ediff-buffers buff1 buff2))))
1194
1195(defun git-log-file ()
1196  "Display a log of changes to the marked file(s)."
1197  (interactive)
1198  (let* ((files (git-marked-files))
1199         (coding-system-for-read git-commits-coding-system)
1200         (buffer (apply #'git-run-command-buffer "*git-log*" "rev-list" "--pretty" "HEAD" "--" (git-get-filenames files))))
1201    (with-current-buffer buffer
1202      ; (git-log-mode)  FIXME: implement log mode
1203      (goto-char (point-min))
1204      (setq buffer-read-only t))
1205    (display-buffer buffer)))
1206
1207(defun git-log-edit-files ()
1208  "Return a list of marked files for use in the log-edit buffer."
1209  (with-current-buffer log-edit-parent-buffer
1210    (git-get-filenames (git-marked-files-state 'added 'deleted 'modified))))
1211
1212(defun git-log-edit-diff ()
1213  "Run a diff of the current files being committed from a log-edit buffer."
1214  (with-current-buffer log-edit-parent-buffer
1215    (git-diff-file)))
1216
1217(defun git-append-sign-off (name email)
1218  "Append a Signed-off-by entry to the current buffer, avoiding duplicates."
1219  (let ((sign-off (format "Signed-off-by: %s <%s>" name email))
1220        (case-fold-search t))
1221    (goto-char (point-min))
1222    (unless (re-search-forward (concat "^" (regexp-quote sign-off)) nil t)
1223      (goto-char (point-min))
1224      (unless (re-search-forward "^Signed-off-by: " nil t)
1225        (setq sign-off (concat "\n" sign-off)))
1226      (goto-char (point-max))
1227      (insert sign-off "\n"))))
1228
1229(defun git-setup-log-buffer (buffer &optional author-name author-email subject date msg)
1230  "Setup the log buffer for a commit."
1231  (unless git-status (error "Not in git-status buffer."))
1232  (let ((merge-heads (git-get-merge-heads))
1233        (dir default-directory)
1234        (committer-name (git-get-committer-name))
1235        (committer-email (git-get-committer-email))
1236        (sign-off git-append-signed-off-by))
1237    (with-current-buffer buffer
1238      (cd dir)
1239      (erase-buffer)
1240      (insert
1241       (propertize
1242        (format "Author: %s <%s>\n%s%s"
1243                (or author-name committer-name)
1244                (or author-email committer-email)
1245                (if date (format "Date: %s\n" date) "")
1246                (if merge-heads
1247                    (format "Parent: %s\n%s\n"
1248                            (git-rev-parse "HEAD")
1249                            (mapconcat (lambda (str) (concat "Parent: " str)) merge-heads "\n"))
1250                  ""))
1251        'face 'git-header-face)
1252       (propertize git-log-msg-separator 'face 'git-separator-face)
1253       "\n")
1254      (when subject (insert subject "\n\n"))
1255      (cond (msg (insert msg "\n"))
1256            ((file-readable-p ".dotest/msg")
1257             (insert-file-contents ".dotest/msg"))
1258            ((file-readable-p ".git/MERGE_MSG")
1259             (insert-file-contents ".git/MERGE_MSG")))
1260      ; delete empty lines at end
1261      (goto-char (point-min))
1262      (when (re-search-forward "\n+\\'" nil t)
1263        (replace-match "\n" t t))
1264      (when sign-off (git-append-sign-off committer-name committer-email)))
1265    buffer))
1266
1267(defun git-commit-file ()
1268  "Commit the marked file(s), asking for a commit message."
1269  (interactive)
1270  (unless git-status (error "Not in git-status buffer."))
1271  (when (git-run-pre-commit-hook)
1272    (let ((buffer (get-buffer-create "*git-commit*"))
1273          (coding-system (git-get-commits-coding-system))
1274          author-name author-email subject date)
1275      (when (eq 0 (buffer-size buffer))
1276        (when (file-readable-p ".dotest/info")
1277          (with-temp-buffer
1278            (insert-file-contents ".dotest/info")
1279            (goto-char (point-min))
1280            (when (re-search-forward "^Author: \\(.*\\)\nEmail: \\(.*\\)$" nil t)
1281              (setq author-name (match-string 1))
1282              (setq author-email (match-string 2)))
1283            (goto-char (point-min))
1284            (when (re-search-forward "^Subject: \\(.*\\)$" nil t)
1285              (setq subject (match-string 1)))
1286            (goto-char (point-min))
1287            (when (re-search-forward "^Date: \\(.*\\)$" nil t)
1288              (setq date (match-string 1)))))
1289        (git-setup-log-buffer buffer author-name author-email subject date))
1290      (if (boundp 'log-edit-diff-function)
1291          (log-edit 'git-do-commit nil '((log-edit-listfun . git-log-edit-files)
1292                                         (log-edit-diff-function . git-log-edit-diff)) buffer)
1293        (log-edit 'git-do-commit nil 'git-log-edit-files buffer))
1294      (setq font-lock-keywords (font-lock-compile-keywords git-log-edit-font-lock-keywords))
1295      (setq buffer-file-coding-system coding-system)
1296      (re-search-forward (regexp-quote (concat git-log-msg-separator "\n")) nil t))))
1297
1298(defun git-setup-commit-buffer (commit)
1299  "Setup the commit buffer with the contents of COMMIT."
1300  (let (author-name author-email subject date msg)
1301    (with-temp-buffer
1302      (let ((coding-system (git-get-logoutput-coding-system)))
1303        (git-call-process-env t nil "log" "-1" commit)
1304        (goto-char (point-min))
1305        (when (re-search-forward "^Author: *\\(.*\\) <\\(.*\\)>$" nil t)
1306          (setq author-name (match-string 1))
1307          (setq author-email (match-string 2)))
1308        (when (re-search-forward "^Date: *\\(.*\\)$" nil t)
1309          (setq date (match-string 1)))
1310        (while (re-search-forward "^    \\(.*\\)$" nil t)
1311          (push (match-string 1) msg))
1312        (setq msg (nreverse msg))
1313        (setq subject (pop msg))
1314        (while (and msg (zerop (length (car msg))) (pop msg)))))
1315    (git-setup-log-buffer (get-buffer-create "*git-commit*")
1316                          author-name author-email subject date
1317                          (mapconcat #'identity msg "\n"))))
1318
1319(defun git-get-commit-files (commit)
1320  "Retrieve the list of files modified by COMMIT."
1321  (let (files)
1322    (with-temp-buffer
1323      (git-call-process-env t nil "diff-tree" "-r" "-z" "--name-only" "--no-commit-id" commit)
1324      (goto-char (point-min))
1325      (while (re-search-forward "\\([^\0]*\\)\0" nil t 1)
1326        (push (match-string 1) files)))
1327    files))
1328
1329(defun git-amend-commit ()
1330  "Undo the last commit on HEAD, and set things up to commit an
1331amended version of it."
1332  (interactive)
1333  (unless git-status (error "Not in git-status buffer."))
1334  (when (git-empty-db-p) (error "No commit to amend."))
1335  (let* ((commit (git-rev-parse "HEAD"))
1336         (files (git-get-commit-files commit)))
1337    (when (git-call-process-display-error "reset" "--soft" "HEAD^")
1338      (git-update-status-files (copy-sequence files) 'uptodate)
1339      (git-mark-files git-status files)
1340      (git-refresh-files)
1341      (git-setup-commit-buffer commit)
1342      (git-commit-file))))
1343
1344(defun git-find-file ()
1345  "Visit the current file in its own buffer."
1346  (interactive)
1347  (unless git-status (error "Not in git-status buffer."))
1348  (let ((info (ewoc-data (ewoc-locate git-status))))
1349    (unless (git-expand-directory info)
1350      (find-file (git-fileinfo->name info))
1351      (when (eq 'unmerged (git-fileinfo->state info))
1352        (smerge-mode 1)))))
1353
1354(defun git-find-file-other-window ()
1355  "Visit the current file in its own buffer in another window."
1356  (interactive)
1357  (unless git-status (error "Not in git-status buffer."))
1358  (let ((info (ewoc-data (ewoc-locate git-status))))
1359    (find-file-other-window (git-fileinfo->name info))
1360    (when (eq 'unmerged (git-fileinfo->state info))
1361      (smerge-mode))))
1362
1363(defun git-find-file-imerge ()
1364  "Visit the current file in interactive merge mode."
1365  (interactive)
1366  (unless git-status (error "Not in git-status buffer."))
1367  (let ((info (ewoc-data (ewoc-locate git-status))))
1368    (find-file (git-fileinfo->name info))
1369    (smerge-ediff)))
1370
1371(defun git-view-file ()
1372  "View the current file in its own buffer."
1373  (interactive)
1374  (unless git-status (error "Not in git-status buffer."))
1375  (let ((info (ewoc-data (ewoc-locate git-status))))
1376    (view-file (git-fileinfo->name info))))
1377
1378(defun git-refresh-status ()
1379  "Refresh the git status buffer."
1380  (interactive)
1381  (let* ((status git-status)
1382         (pos (ewoc-locate status))
1383         (marked-files (git-get-filenames (ewoc-collect status (lambda (info) (git-fileinfo->marked info)))))
1384         (cur-name (and pos (git-fileinfo->name (ewoc-data pos)))))
1385    (unless status (error "Not in git-status buffer."))
1386    (message "Refreshing git status...")
1387    (git-call-process-env nil nil "update-index" "--refresh")
1388    (git-clear-status status)
1389    (git-update-status-files nil)
1390    ; restore file marks
1391    (when marked-files
1392      (git-status-filenames-map status
1393                                (lambda (info)
1394                                        (setf (git-fileinfo->marked info) t)
1395                                        (setf (git-fileinfo->needs-refresh info) t))
1396                                marked-files)
1397      (git-refresh-files))
1398    ; move point to the current file name if any
1399    (message "Refreshing git status...done")
1400    (let ((node (and cur-name (git-find-status-file status cur-name))))
1401      (when node (ewoc-goto-node status node)))))
1402
1403(defun git-status-quit ()
1404  "Quit git-status mode."
1405  (interactive)
1406  (bury-buffer))
1407
1408;;;; Major Mode
1409;;;; ------------------------------------------------------------
1410
1411(defvar git-status-mode-hook nil
1412  "Run after `git-status-mode' is setup.")
1413
1414(defvar git-status-mode-map nil
1415  "Keymap for git major mode.")
1416
1417(defvar git-status nil
1418  "List of all files managed by the git-status mode.")
1419
1420(unless git-status-mode-map
1421  (let ((map (make-keymap))
1422        (commit-map (make-sparse-keymap))
1423        (diff-map (make-sparse-keymap))
1424        (toggle-map (make-sparse-keymap)))
1425    (suppress-keymap map)
1426    (define-key map "?"   'git-help)
1427    (define-key map "h"   'git-help)
1428    (define-key map " "   'git-next-file)
1429    (define-key map "a"   'git-add-file)
1430    (define-key map "c"   'git-commit-file)
1431    (define-key map "\C-c" commit-map)
1432    (define-key map "d"    diff-map)
1433    (define-key map "="   'git-diff-file)
1434    (define-key map "f"   'git-find-file)
1435    (define-key map "\r"  'git-find-file)
1436    (define-key map "g"   'git-refresh-status)
1437    (define-key map "i"   'git-ignore-file)
1438    (define-key map "l"   'git-log-file)
1439    (define-key map "m"   'git-mark-file)
1440    (define-key map "M"   'git-mark-all)
1441    (define-key map "n"   'git-next-file)
1442    (define-key map "N"   'git-next-unmerged-file)
1443    (define-key map "o"   'git-find-file-other-window)
1444    (define-key map "p"   'git-prev-file)
1445    (define-key map "P"   'git-prev-unmerged-file)
1446    (define-key map "q"   'git-status-quit)
1447    (define-key map "r"   'git-remove-file)
1448    (define-key map "R"   'git-resolve-file)
1449    (define-key map "t"    toggle-map)
1450    (define-key map "T"   'git-toggle-all-marks)
1451    (define-key map "u"   'git-unmark-file)
1452    (define-key map "U"   'git-revert-file)
1453    (define-key map "v"   'git-view-file)
1454    (define-key map "x"   'git-remove-handled)
1455    (define-key map "\C-?" 'git-unmark-file-up)
1456    (define-key map "\M-\C-?" 'git-unmark-all)
1457    ; the commit submap
1458    (define-key commit-map "\C-a" 'git-amend-commit)
1459    ; the diff submap
1460    (define-key diff-map "b" 'git-diff-file-base)
1461    (define-key diff-map "c" 'git-diff-file-combined)
1462    (define-key diff-map "=" 'git-diff-file)
1463    (define-key diff-map "e" 'git-diff-file-idiff)
1464    (define-key diff-map "E" 'git-find-file-imerge)
1465    (define-key diff-map "h" 'git-diff-file-merge-head)
1466    (define-key diff-map "m" 'git-diff-file-mine)
1467    (define-key diff-map "o" 'git-diff-file-other)
1468    ; the toggle submap
1469    (define-key toggle-map "u" 'git-toggle-show-uptodate)
1470    (define-key toggle-map "i" 'git-toggle-show-ignored)
1471    (define-key toggle-map "k" 'git-toggle-show-unknown)
1472    (define-key toggle-map "m" 'git-toggle-all-marks)
1473    (setq git-status-mode-map map))
1474  (easy-menu-define git-menu git-status-mode-map
1475    "Git Menu"
1476    `("Git"
1477      ["Refresh" git-refresh-status t]
1478      ["Commit" git-commit-file t]
1479      ("Merge"
1480        ["Next Unmerged File" git-next-unmerged-file t]
1481        ["Prev Unmerged File" git-prev-unmerged-file t]
1482        ["Mark as Resolved" git-resolve-file t]
1483        ["Interactive Merge File" git-find-file-imerge t]
1484        ["Diff Against Common Base File" git-diff-file-base t]
1485        ["Diff Combined" git-diff-file-combined t]
1486        ["Diff Against Merge Head" git-diff-file-merge-head t]
1487        ["Diff Against Mine" git-diff-file-mine t]
1488        ["Diff Against Other" git-diff-file-other t])
1489      "--------"
1490      ["Add File" git-add-file t]
1491      ["Revert File" git-revert-file t]
1492      ["Ignore File" git-ignore-file t]
1493      ["Remove File" git-remove-file t]
1494      "--------"
1495      ["Find File" git-find-file t]
1496      ["View File" git-view-file t]
1497      ["Diff File" git-diff-file t]
1498      ["Interactive Diff File" git-diff-file-idiff t]
1499      ["Log" git-log-file t]
1500      "--------"
1501      ["Mark" git-mark-file t]
1502      ["Mark All" git-mark-all t]
1503      ["Unmark" git-unmark-file t]
1504      ["Unmark All" git-unmark-all t]
1505      ["Toggle All Marks" git-toggle-all-marks t]
1506      ["Hide Handled Files" git-remove-handled t]
1507      "--------"
1508      ["Show Uptodate Files" git-toggle-show-uptodate :style toggle :selected git-show-uptodate]
1509      ["Show Ignored Files" git-toggle-show-ignored :style toggle :selected git-show-ignored]
1510      ["Show Unknown Files" git-toggle-show-unknown :style toggle :selected git-show-unknown]
1511      "--------"
1512      ["Quit" git-status-quit t])))
1513
1514
1515;; git mode should only run in the *git status* buffer
1516(put 'git-status-mode 'mode-class 'special)
1517
1518(defun git-status-mode ()
1519  "Major mode for interacting with Git.
1520Commands:
1521\\{git-status-mode-map}"
1522  (kill-all-local-variables)
1523  (buffer-disable-undo)
1524  (setq mode-name "git status"
1525        major-mode 'git-status-mode
1526        goal-column 17
1527        buffer-read-only t)
1528  (use-local-map git-status-mode-map)
1529  (let ((buffer-read-only nil))
1530    (erase-buffer)
1531  (let ((status (ewoc-create 'git-fileinfo-prettyprint "" "")))
1532    (set (make-local-variable 'git-status) status))
1533  (set (make-local-variable 'list-buffers-directory) default-directory)
1534  (make-local-variable 'git-show-uptodate)
1535  (make-local-variable 'git-show-ignored)
1536  (make-local-variable 'git-show-unknown)
1537  (run-hooks 'git-status-mode-hook)))
1538
1539(defun git-find-status-buffer (dir)
1540  "Find the git status buffer handling a specified directory."
1541  (let ((list (buffer-list))
1542        (fulldir (expand-file-name dir))
1543        found)
1544    (while (and list (not found))
1545      (let ((buffer (car list)))
1546        (with-current-buffer buffer
1547          (when (and list-buffers-directory
1548                     (string-equal fulldir (expand-file-name list-buffers-directory))
1549                     (string-match "\\*git-status\\*$" (buffer-name buffer)))
1550            (setq found buffer))))
1551      (setq list (cdr list)))
1552    found))
1553
1554(defun git-status (dir)
1555  "Entry point into git-status mode."
1556  (interactive "DSelect directory: ")
1557  (setq dir (git-get-top-dir dir))
1558  (if (file-directory-p (concat (file-name-as-directory dir) ".git"))
1559      (let ((buffer (or (and git-reuse-status-buffer (git-find-status-buffer dir))
1560                        (create-file-buffer (expand-file-name "*git-status*" dir)))))
1561        (switch-to-buffer buffer)
1562        (cd dir)
1563        (git-status-mode)
1564        (git-refresh-status)
1565        (goto-char (point-min))
1566        (add-hook 'after-save-hook 'git-update-saved-file))
1567    (message "%s is not a git working tree." dir)))
1568
1569(defun git-update-saved-file ()
1570  "Update the corresponding git-status buffer when a file is saved.
1571Meant to be used in `after-save-hook'."
1572  (let* ((file (expand-file-name buffer-file-name))
1573         (dir (condition-case nil (git-get-top-dir (file-name-directory file)) (error nil)))
1574         (buffer (and dir (git-find-status-buffer dir))))
1575    (when buffer
1576      (with-current-buffer buffer
1577        (let ((filename (file-relative-name file dir)))
1578          ; skip files located inside the .git directory
1579          (unless (string-match "^\\.git/" filename)
1580            (git-call-process-env nil nil "add" "--refresh" "--" filename)
1581            (git-update-status-files (list filename) 'uptodate)))))))
1582
1583(defun git-help ()
1584  "Display help for Git mode."
1585  (interactive)
1586  (describe-function 'git-status-mode))
1587
1588(provide 'git)
1589;;; git.el ends here