Andrew's git / gitweb.git / contrib/emacs/git.el
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contrib / emacs / git.elon commit Merge branch 'ew/maint-svn-cert-fileprovider' (7385a42)
   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  (let ((process-environment (append (git-get-env-strings env)
 189                                     process-environment)))
 190    (apply #'call-process "git" nil buffer nil args)))
 191
 192(defun git-call-process-display-error (&rest args)
 193  "Wrapper for call-process that displays error messages."
 194  (let* ((dir default-directory)
 195         (buffer (get-buffer-create "*Git Command Output*"))
 196         (ok (with-current-buffer buffer
 197               (let ((default-directory dir)
 198                     (buffer-read-only nil))
 199                 (erase-buffer)
 200                 (eq 0 (apply 'call-process "git" nil (list buffer t) nil args))))))
 201    (unless ok (display-message-or-buffer buffer))
 202    ok))
 203
 204(defun git-call-process-env-string (env &rest args)
 205  "Wrapper for call-process that sets environment strings,
 206and returns the process output as a string, or nil if the git failed."
 207  (with-temp-buffer
 208    (and (eq 0 (apply #' git-call-process-env t env args))
 209         (buffer-string))))
 210
 211(defun git-run-process-region (buffer start end program args)
 212  "Run a git process with a buffer region as input."
 213  (let ((output-buffer (current-buffer))
 214        (dir default-directory))
 215    (with-current-buffer buffer
 216      (cd dir)
 217      (apply #'call-process-region start end program
 218             nil (list output-buffer nil) nil args))))
 219
 220(defun git-run-command-buffer (buffer-name &rest args)
 221  "Run a git command, sending the output to a buffer named BUFFER-NAME."
 222  (let ((dir default-directory)
 223        (buffer (get-buffer-create buffer-name)))
 224    (message "Running git %s..." (car args))
 225    (with-current-buffer buffer
 226      (let ((default-directory dir)
 227            (buffer-read-only nil))
 228        (erase-buffer)
 229        (apply #'git-call-process-env buffer nil args)))
 230    (message "Running git %s...done" (car args))
 231    buffer))
 232
 233(defun git-run-command-region (buffer start end env &rest args)
 234  "Run a git command with specified buffer region as input."
 235  (unless (eq 0 (if env
 236                    (git-run-process-region
 237                     buffer start end "env"
 238                     (append (git-get-env-strings env) (list "git") args))
 239                  (git-run-process-region
 240                   buffer start end "git" args)))
 241    (error "Failed to run \"git %s\":\n%s" (mapconcat (lambda (x) x) args " ") (buffer-string))))
 242
 243(defun git-run-hook (hook env &rest args)
 244  "Run a git hook and display its output if any."
 245  (let ((dir default-directory)
 246        (hook-name (expand-file-name (concat ".git/hooks/" hook))))
 247    (or (not (file-executable-p hook-name))
 248        (let (status (buffer (get-buffer-create "*Git Hook Output*")))
 249          (with-current-buffer buffer
 250            (erase-buffer)
 251            (cd dir)
 252            (setq status
 253                  (if env
 254                      (apply #'call-process "env" nil (list buffer t) nil
 255                             (append (git-get-env-strings env) (list hook-name) args))
 256                    (apply #'call-process hook-name nil (list buffer t) nil args))))
 257          (display-message-or-buffer buffer)
 258          (eq 0 status)))))
 259
 260(defun git-get-string-sha1 (string)
 261  "Read a SHA1 from the specified string."
 262  (and string
 263       (string-match "[0-9a-f]\\{40\\}" string)
 264       (match-string 0 string)))
 265
 266(defun git-get-committer-name ()
 267  "Return the name to use as GIT_COMMITTER_NAME."
 268  ; copied from log-edit
 269  (or git-committer-name
 270      (git-config "user.name")
 271      (and (boundp 'add-log-full-name) add-log-full-name)
 272      (and (fboundp 'user-full-name) (user-full-name))
 273      (and (boundp 'user-full-name) user-full-name)))
 274
 275(defun git-get-committer-email ()
 276  "Return the email address to use as GIT_COMMITTER_EMAIL."
 277  ; copied from log-edit
 278  (or git-committer-email
 279      (git-config "user.email")
 280      (and (boundp 'add-log-mailing-address) add-log-mailing-address)
 281      (and (fboundp 'user-mail-address) (user-mail-address))
 282      (and (boundp 'user-mail-address) user-mail-address)))
 283
 284(defun git-get-commits-coding-system ()
 285  "Return the coding system to use for commits."
 286  (let ((repo-config (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-get-logoutput-coding-system ()
 294  "Return the coding system used for git-log output."
 295  (let ((repo-config (or (git-config "i18n.logoutputencoding")
 296                         (git-config "i18n.commitencoding"))))
 297    (or git-commits-coding-system
 298        (and repo-config
 299             (fboundp 'locale-charset-to-coding-system)
 300             (locale-charset-to-coding-system repo-config))
 301      'utf-8)))
 302
 303(defun git-escape-file-name (name)
 304  "Escape a file name if necessary."
 305  (if (string-match "[\n\t\"\\]" name)
 306      (concat "\""
 307              (mapconcat (lambda (c)
 308                   (case c
 309                     (?\n "\\n")
 310                     (?\t "\\t")
 311                     (?\\ "\\\\")
 312                     (?\" "\\\"")
 313                     (t (char-to-string c))))
 314                 name "")
 315              "\"")
 316    name))
 317
 318(defun git-success-message (text files)
 319  "Print a success message after having handled FILES."
 320  (let ((n (length files)))
 321    (if (equal n 1)
 322        (message "%s %s" text (car files))
 323      (message "%s %d files" text n))))
 324
 325(defun git-get-top-dir (dir)
 326  "Retrieve the top-level directory of a git tree."
 327  (let ((cdup (with-output-to-string
 328                (with-current-buffer standard-output
 329                  (cd dir)
 330                  (unless (eq 0 (call-process "git" nil t nil "rev-parse" "--show-cdup"))
 331                    (error "cannot find top-level git tree for %s." dir))))))
 332    (expand-file-name (concat (file-name-as-directory dir)
 333                              (car (split-string cdup "\n"))))))
 334
 335;stolen from pcl-cvs
 336(defun git-append-to-ignore (file)
 337  "Add a file name to the ignore file in its directory."
 338  (let* ((fullname (expand-file-name file))
 339         (dir (file-name-directory fullname))
 340         (name (file-name-nondirectory fullname))
 341         (ignore-name (expand-file-name git-per-dir-ignore-file dir))
 342         (created (not (file-exists-p ignore-name))))
 343  (save-window-excursion
 344    (set-buffer (find-file-noselect ignore-name))
 345    (goto-char (point-max))
 346    (unless (zerop (current-column)) (insert "\n"))
 347    (insert "/" name "\n")
 348    (sort-lines nil (point-min) (point-max))
 349    (save-buffer))
 350  (when created
 351    (git-call-process-env nil nil "update-index" "--add" "--" (file-relative-name ignore-name)))
 352  (git-update-status-files (list (file-relative-name ignore-name)) 'unknown)))
 353
 354; propertize definition for XEmacs, stolen from erc-compat
 355(eval-when-compile
 356  (unless (fboundp 'propertize)
 357    (defun propertize (string &rest props)
 358      (let ((string (copy-sequence string)))
 359        (while props
 360          (put-text-property 0 (length string) (nth 0 props) (nth 1 props) string)
 361          (setq props (cddr props)))
 362        string))))
 363
 364;;;; Wrappers for basic git commands
 365;;;; ------------------------------------------------------------
 366
 367(defun git-rev-parse (rev)
 368  "Parse a revision name and return its SHA1."
 369  (git-get-string-sha1
 370   (git-call-process-env-string nil "rev-parse" rev)))
 371
 372(defun git-config (key)
 373  "Retrieve the value associated to KEY in the git repository config file."
 374  (let ((str (git-call-process-env-string nil "config" key)))
 375    (and str (car (split-string str "\n")))))
 376
 377(defun git-symbolic-ref (ref)
 378  "Wrapper for the git-symbolic-ref command."
 379  (let ((str (git-call-process-env-string nil "symbolic-ref" ref)))
 380    (and str (car (split-string str "\n")))))
 381
 382(defun git-update-ref (ref newval &optional oldval reason)
 383  "Update a reference by calling git-update-ref."
 384  (let ((args (and oldval (list oldval))))
 385    (push newval args)
 386    (push ref args)
 387    (when reason
 388     (push reason args)
 389     (push "-m" args))
 390    (apply 'git-call-process-display-error "update-ref" args)))
 391
 392(defun git-read-tree (tree &optional index-file)
 393  "Read a tree into the index file."
 394  (apply #'git-call-process-env nil
 395         (if index-file `(("GIT_INDEX_FILE" . ,index-file)) nil)
 396         "read-tree" (if tree (list tree))))
 397
 398(defun git-write-tree (&optional index-file)
 399  "Call git-write-tree and return the resulting tree SHA1 as a string."
 400  (git-get-string-sha1
 401   (git-call-process-env-string (and index-file `(("GIT_INDEX_FILE" . ,index-file))) "write-tree")))
 402
 403(defun git-commit-tree (buffer tree head)
 404  "Call git-commit-tree with buffer as input and return the resulting commit SHA1."
 405  (let ((author-name (git-get-committer-name))
 406        (author-email (git-get-committer-email))
 407        (subject "commit (initial): ")
 408        author-date log-start log-end args coding-system-for-write)
 409    (when head
 410      (setq subject "commit: ")
 411      (push "-p" args)
 412      (push head args))
 413    (with-current-buffer buffer
 414      (goto-char (point-min))
 415      (if
 416          (setq log-start (re-search-forward (concat "^" (regexp-quote git-log-msg-separator) "\n") nil t))
 417          (save-restriction
 418            (narrow-to-region (point-min) log-start)
 419            (goto-char (point-min))
 420            (when (re-search-forward "^Author: +\\(.*?\\) *<\\(.*\\)> *$" nil t)
 421              (setq author-name (match-string 1)
 422                    author-email (match-string 2)))
 423            (goto-char (point-min))
 424            (when (re-search-forward "^Date: +\\(.*\\)$" nil t)
 425              (setq author-date (match-string 1)))
 426            (goto-char (point-min))
 427            (while (re-search-forward "^Parent: +\\([0-9a-f]+\\)" nil t)
 428              (unless (string-equal head (match-string 1))
 429                (setq subject "commit (merge): ")
 430                (push "-p" args)
 431                (push (match-string 1) args))))
 432        (setq log-start (point-min)))
 433      (setq log-end (point-max))
 434      (goto-char log-start)
 435      (when (re-search-forward ".*$" nil t)
 436        (setq subject (concat subject (match-string 0))))
 437      (setq coding-system-for-write buffer-file-coding-system))
 438    (let ((commit
 439           (git-get-string-sha1
 440            (with-output-to-string
 441              (with-current-buffer standard-output
 442                (let ((env `(("GIT_AUTHOR_NAME" . ,author-name)
 443                             ("GIT_AUTHOR_EMAIL" . ,author-email)
 444                             ("GIT_COMMITTER_NAME" . ,(git-get-committer-name))
 445                             ("GIT_COMMITTER_EMAIL" . ,(git-get-committer-email)))))
 446                  (when author-date (push `("GIT_AUTHOR_DATE" . ,author-date) env))
 447                  (apply #'git-run-command-region
 448                         buffer log-start log-end env
 449                         "commit-tree" tree (nreverse args))))))))
 450      (and (git-update-ref "HEAD" commit head subject)
 451           commit))))
 452
 453(defun git-empty-db-p ()
 454  "Check if the git db is empty (no commit done yet)."
 455  (not (eq 0 (call-process "git" nil nil nil "rev-parse" "--verify" "HEAD"))))
 456
 457(defun git-get-merge-heads ()
 458  "Retrieve the merge heads from the MERGE_HEAD file if present."
 459  (let (heads)
 460    (when (file-readable-p ".git/MERGE_HEAD")
 461      (with-temp-buffer
 462        (insert-file-contents ".git/MERGE_HEAD" nil nil nil t)
 463        (goto-char (point-min))
 464        (while (re-search-forward "[0-9a-f]\\{40\\}" nil t)
 465          (push (match-string 0) heads))))
 466    (nreverse heads)))
 467
 468(defun git-get-commit-description (commit)
 469  "Get a one-line description of COMMIT."
 470  (let ((coding-system-for-read (git-get-logoutput-coding-system)))
 471    (let ((descr (git-call-process-env-string nil "log" "--max-count=1" "--pretty=oneline" commit)))
 472      (if (and descr (string-match "\\`\\([0-9a-f]\\{40\\}\\) *\\(.*\\)$" descr))
 473          (concat (substring (match-string 1 descr) 0 10) " - " (match-string 2 descr))
 474        descr))))
 475
 476;;;; File info structure
 477;;;; ------------------------------------------------------------
 478
 479; fileinfo structure stolen from pcl-cvs
 480(defstruct (git-fileinfo
 481            (:copier nil)
 482            (:constructor git-create-fileinfo (state name &optional old-perm new-perm rename-state orig-name marked))
 483            (:conc-name git-fileinfo->))
 484  marked              ;; t/nil
 485  state               ;; current state
 486  name                ;; file name
 487  old-perm new-perm   ;; permission flags
 488  rename-state        ;; rename or copy state
 489  orig-name           ;; original name for renames or copies
 490  needs-refresh)      ;; whether file needs to be refreshed
 491
 492(defvar git-status nil)
 493
 494(defun git-clear-status (status)
 495  "Remove everything from the status list."
 496  (ewoc-filter status (lambda (info) nil)))
 497
 498(defun git-set-fileinfo-state (info state)
 499  "Set the state of a file info."
 500  (unless (eq (git-fileinfo->state info) state)
 501    (setf (git-fileinfo->state info) state
 502          (git-fileinfo->new-perm info) (git-fileinfo->old-perm info)
 503          (git-fileinfo->rename-state info) nil
 504          (git-fileinfo->orig-name info) nil
 505          (git-fileinfo->needs-refresh info) t)))
 506
 507(defun git-status-filenames-map (status func files &rest args)
 508  "Apply FUNC to the status files names in the FILES list."
 509  (when files
 510    (setq files (sort files #'string-lessp))
 511    (let ((file (pop files))
 512          (node (ewoc-nth status 0)))
 513      (while (and file node)
 514        (let ((info (ewoc-data node)))
 515          (if (string-lessp (git-fileinfo->name info) file)
 516              (setq node (ewoc-next status node))
 517            (if (string-equal (git-fileinfo->name info) file)
 518                (apply func info args))
 519            (setq file (pop files))))))))
 520
 521(defun git-set-filenames-state (status files state)
 522  "Set the state of a list of named files."
 523  (when files
 524    (git-status-filenames-map status #'git-set-fileinfo-state files state)
 525    (unless state  ;; delete files whose state has been set to nil
 526      (ewoc-filter status (lambda (info) (git-fileinfo->state info))))))
 527
 528(defun git-state-code (code)
 529  "Convert from a string to a added/deleted/modified state."
 530  (case (string-to-char code)
 531    (?M 'modified)
 532    (?? 'unknown)
 533    (?A 'added)
 534    (?D 'deleted)
 535    (?U 'unmerged)
 536    (?T 'modified)
 537    (t nil)))
 538
 539(defun git-status-code-as-string (code)
 540  "Format a git status code as string."
 541  (case code
 542    ('modified (propertize "Modified" 'face 'git-status-face))
 543    ('unknown  (propertize "Unknown " 'face 'git-unknown-face))
 544    ('added    (propertize "Added   " 'face 'git-status-face))
 545    ('deleted  (propertize "Deleted " 'face 'git-status-face))
 546    ('unmerged (propertize "Unmerged" 'face 'git-unmerged-face))
 547    ('uptodate (propertize "Uptodate" 'face 'git-uptodate-face))
 548    ('ignored  (propertize "Ignored " 'face 'git-ignored-face))
 549    (t "?       ")))
 550
 551(defun git-file-type-as-string (old-perm new-perm)
 552  "Return a string describing the file type based on its permissions."
 553  (let* ((old-type (lsh (or old-perm 0) -9))
 554         (new-type (lsh (or new-perm 0) -9))
 555         (str (case new-type
 556                (?\100  ;; file
 557                 (case old-type
 558                   (?\100 nil)
 559                   (?\120 "   (type change symlink -> file)")
 560                   (?\160 "   (type change subproject -> file)")))
 561                 (?\120  ;; symlink
 562                  (case old-type
 563                    (?\100 "   (type change file -> symlink)")
 564                    (?\160 "   (type change subproject -> symlink)")
 565                    (t "   (symlink)")))
 566                  (?\160  ;; subproject
 567                   (case old-type
 568                     (?\100 "   (type change file -> subproject)")
 569                     (?\120 "   (type change symlink -> subproject)")
 570                     (t "   (subproject)")))
 571                  (?\110 nil)  ;; directory (internal, not a real git state)
 572                  (?\000  ;; deleted or unknown
 573                   (case old-type
 574                     (?\120 "   (symlink)")
 575                     (?\160 "   (subproject)")))
 576                  (t (format "   (unknown type %o)" new-type)))))
 577    (cond (str (propertize str 'face 'git-status-face))
 578          ((eq new-type ?\110) "/")
 579          (t ""))))
 580
 581(defun git-rename-as-string (info)
 582  "Return a string describing the copy or rename associated with INFO, or an empty string if none."
 583  (let ((state (git-fileinfo->rename-state info)))
 584    (if state
 585        (propertize
 586         (concat "   ("
 587                 (if (eq state 'copy) "copied from "
 588                   (if (eq (git-fileinfo->state info) 'added) "renamed from "
 589                     "renamed to "))
 590                 (git-escape-file-name (git-fileinfo->orig-name info))
 591                 ")") 'face 'git-status-face)
 592      "")))
 593
 594(defun git-permissions-as-string (old-perm new-perm)
 595  "Format a permission change as string."
 596  (propertize
 597   (if (or (not old-perm)
 598           (not new-perm)
 599           (eq 0 (logand ?\111 (logxor old-perm new-perm))))
 600       "  "
 601     (if (eq 0 (logand ?\111 old-perm)) "+x" "-x"))
 602  'face 'git-permission-face))
 603
 604(defun git-fileinfo-prettyprint (info)
 605  "Pretty-printer for the git-fileinfo structure."
 606  (let ((old-perm (git-fileinfo->old-perm info))
 607        (new-perm (git-fileinfo->new-perm info)))
 608    (insert (concat "   " (if (git-fileinfo->marked info) (propertize "*" 'face 'git-mark-face) " ")
 609                    " " (git-status-code-as-string (git-fileinfo->state info))
 610                    " " (git-permissions-as-string old-perm new-perm)
 611                    "  " (git-escape-file-name (git-fileinfo->name info))
 612                    (git-file-type-as-string old-perm new-perm)
 613                    (git-rename-as-string info)))))
 614
 615(defun git-insert-info-list (status infolist)
 616  "Insert a list of file infos in the status buffer, replacing existing ones if any."
 617  (setq infolist (sort infolist
 618                       (lambda (info1 info2)
 619                         (string-lessp (git-fileinfo->name info1)
 620                                       (git-fileinfo->name info2)))))
 621  (let ((info (pop infolist))
 622        (node (ewoc-nth status 0)))
 623    (while info
 624      (cond ((not node)
 625             (setq node (ewoc-enter-last status info))
 626             (setq info (pop infolist)))
 627            ((string-lessp (git-fileinfo->name (ewoc-data node))
 628                           (git-fileinfo->name info))
 629             (setq node (ewoc-next status node)))
 630            ((string-equal (git-fileinfo->name (ewoc-data node))
 631                           (git-fileinfo->name info))
 632              ;; preserve the marked flag
 633              (setf (git-fileinfo->marked info) (git-fileinfo->marked (ewoc-data node)))
 634              (setf (git-fileinfo->needs-refresh info) t)
 635              (setf (ewoc-data node) info)
 636              (setq info (pop infolist)))
 637            (t
 638             (setq node (ewoc-enter-before status node info))
 639             (setq info (pop infolist)))))))
 640
 641(defun git-run-diff-index (status files)
 642  "Run git-diff-index on FILES and parse the results into STATUS.
 643Return the list of files that haven't been handled."
 644  (let ((remaining (copy-sequence files))
 645        infolist)
 646    (with-temp-buffer
 647      (apply #'git-call-process-env t nil "diff-index" "-z" "-M" "HEAD" "--" files)
 648      (goto-char (point-min))
 649      (while (re-search-forward
 650              ":\\([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"
 651              nil t 1)
 652        (let ((old-perm (string-to-number (match-string 1) 8))
 653              (new-perm (string-to-number (match-string 2) 8))
 654              (state (or (match-string 4) (match-string 6)))
 655              (name (or (match-string 5) (match-string 7)))
 656              (new-name (match-string 8)))
 657          (if new-name  ; copy or rename
 658              (if (eq ?C (string-to-char state))
 659                  (push (git-create-fileinfo 'added new-name old-perm new-perm 'copy name) infolist)
 660                (push (git-create-fileinfo 'deleted name 0 0 'rename new-name) infolist)
 661                (push (git-create-fileinfo 'added new-name old-perm new-perm 'rename name) infolist))
 662            (push (git-create-fileinfo (git-state-code state) name old-perm new-perm) infolist))
 663          (setq remaining (delete name remaining))
 664          (when new-name (setq remaining (delete new-name remaining))))))
 665    (git-insert-info-list status infolist)
 666    remaining))
 667
 668(defun git-find-status-file (status file)
 669  "Find a given file in the status ewoc and return its node."
 670  (let ((node (ewoc-nth status 0)))
 671    (while (and node (not (string= file (git-fileinfo->name (ewoc-data node)))))
 672      (setq node (ewoc-next status node)))
 673    node))
 674
 675(defun git-run-ls-files (status files default-state &rest options)
 676  "Run git-ls-files on FILES and parse the results into STATUS.
 677Return the list of files that haven't been handled."
 678  (let (infolist)
 679    (with-temp-buffer
 680      (apply #'git-call-process-env t nil "ls-files" "-z" (append options (list "--") files))
 681      (goto-char (point-min))
 682      (while (re-search-forward "\\([^\0]*?\\)\\(/?\\)\0" nil t 1)
 683        (let ((name (match-string 1)))
 684          (push (git-create-fileinfo default-state name 0
 685                                     (if (string-equal "/" (match-string 2)) (lsh ?\110 9) 0))
 686                infolist)
 687          (setq files (delete name files)))))
 688    (git-insert-info-list status infolist)
 689    files))
 690
 691(defun git-run-ls-files-cached (status files default-state)
 692  "Run git-ls-files -c on FILES and parse the results into STATUS.
 693Return the list of files that haven't been handled."
 694  (let ((remaining (copy-sequence files))
 695        infolist)
 696    (with-temp-buffer
 697      (apply #'git-call-process-env t nil "ls-files" "-z" "-s" "-c" "--" files)
 698      (goto-char (point-min))
 699      (while (re-search-forward "\\([0-7]\\{6\\}\\) [0-9a-f]\\{40\\} 0\t\\([^\0]+\\)\0" nil t)
 700        (let* ((new-perm (string-to-number (match-string 1) 8))
 701               (old-perm (if (eq default-state 'added) 0 new-perm))
 702               (name (match-string 2)))
 703          (push (git-create-fileinfo default-state name old-perm new-perm) infolist)
 704          (setq remaining (delete name remaining)))))
 705    (git-insert-info-list status infolist)
 706    remaining))
 707
 708(defun git-run-ls-unmerged (status files)
 709  "Run git-ls-files -u on FILES and parse the results into STATUS."
 710  (with-temp-buffer
 711    (apply #'git-call-process-env t nil "ls-files" "-z" "-u" "--" files)
 712    (goto-char (point-min))
 713    (let (unmerged-files)
 714      (while (re-search-forward "[0-7]\\{6\\} [0-9a-f]\\{40\\} [123]\t\\([^\0]+\\)\0" nil t)
 715        (push (match-string 1) unmerged-files))
 716      (git-set-filenames-state status unmerged-files 'unmerged))))
 717
 718(defun git-get-exclude-files ()
 719  "Get the list of exclude files to pass to git-ls-files."
 720  (let (files
 721        (config (git-config "core.excludesfile")))
 722    (when (file-readable-p ".git/info/exclude")
 723      (push ".git/info/exclude" files))
 724    (when (and config (file-readable-p config))
 725      (push config files))
 726    files))
 727
 728(defun git-run-ls-files-with-excludes (status files default-state &rest options)
 729  "Run git-ls-files on FILES with appropriate --exclude-from options."
 730  (let ((exclude-files (git-get-exclude-files)))
 731    (apply #'git-run-ls-files status files default-state "--directory" "--no-empty-directory"
 732           (concat "--exclude-per-directory=" git-per-dir-ignore-file)
 733           (append options (mapcar (lambda (f) (concat "--exclude-from=" f)) exclude-files)))))
 734
 735(defun git-update-status-files (files &optional default-state)
 736  "Update the status of FILES from the index."
 737  (unless git-status (error "Not in git-status buffer."))
 738  (when (or git-show-uptodate files)
 739    (git-run-ls-files-cached git-status files 'uptodate))
 740  (let* ((remaining-files
 741          (if (git-empty-db-p) ; we need some special handling for an empty db
 742              (git-run-ls-files-cached git-status files 'added)
 743            (git-run-diff-index git-status files))))
 744    (git-run-ls-unmerged git-status files)
 745    (when (or remaining-files (and git-show-unknown (not files)))
 746      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'unknown "-o")))
 747    (when (or remaining-files (and git-show-ignored (not files)))
 748      (setq remaining-files (git-run-ls-files-with-excludes git-status remaining-files 'ignored "-o" "-i")))
 749    (git-set-filenames-state git-status remaining-files default-state)
 750    (git-refresh-files)
 751    (git-refresh-ewoc-hf git-status)))
 752
 753(defun git-mark-files (status files)
 754  "Mark all the specified FILES, and unmark the others."
 755  (setq files (sort files #'string-lessp))
 756  (let ((file (and files (pop files)))
 757        (node (ewoc-nth status 0)))
 758    (while node
 759      (let ((info (ewoc-data node)))
 760        (if (and file (string-equal (git-fileinfo->name info) file))
 761            (progn
 762              (unless (git-fileinfo->marked info)
 763                (setf (git-fileinfo->marked info) t)
 764                (setf (git-fileinfo->needs-refresh info) t))
 765              (setq file (pop files))
 766              (setq node (ewoc-next status node)))
 767          (when (git-fileinfo->marked info)
 768            (setf (git-fileinfo->marked info) nil)
 769            (setf (git-fileinfo->needs-refresh info) t))
 770          (if (and file (string-lessp file (git-fileinfo->name info)))
 771              (setq file (pop files))
 772            (setq node (ewoc-next status node))))))))
 773
 774(defun git-marked-files ()
 775  "Return a list of all marked files, or if none a list containing just the file at cursor position."
 776  (unless git-status (error "Not in git-status buffer."))
 777  (or (ewoc-collect git-status (lambda (info) (git-fileinfo->marked info)))
 778      (list (ewoc-data (ewoc-locate git-status)))))
 779
 780(defun git-marked-files-state (&rest states)
 781  "Return marked files that are in the specified states."
 782  (let ((files (git-marked-files))
 783        result)
 784    (dolist (info files)
 785      (when (memq (git-fileinfo->state info) states)
 786        (push info result)))
 787    result))
 788
 789(defun git-refresh-files ()
 790  "Refresh all files that need it and clear the needs-refresh flag."
 791  (unless git-status (error "Not in git-status buffer."))
 792  (ewoc-map
 793   (lambda (info)
 794     (let ((refresh (git-fileinfo->needs-refresh info)))
 795       (setf (git-fileinfo->needs-refresh info) nil)
 796       refresh))
 797   git-status)
 798  ; move back to goal column
 799  (when goal-column (move-to-column goal-column)))
 800
 801(defun git-refresh-ewoc-hf (status)
 802  "Refresh the ewoc header and footer."
 803  (let ((branch (git-symbolic-ref "HEAD"))
 804        (head (if (git-empty-db-p) "Nothing committed yet"
 805                (git-get-commit-description "HEAD")))
 806        (merge-heads (git-get-merge-heads)))
 807    (ewoc-set-hf status
 808                 (format "Directory:  %s\nBranch:     %s\nHead:       %s%s\n"
 809                         default-directory
 810                         (if branch
 811                             (if (string-match "^refs/heads/" branch)
 812                                 (substring branch (match-end 0))
 813                               branch)
 814                           "none (detached HEAD)")
 815                         head
 816                         (if merge-heads
 817                             (concat "\nMerging:    "
 818                                     (mapconcat (lambda (str) (git-get-commit-description str)) merge-heads "\n            "))
 819                           ""))
 820                 (if (ewoc-nth status 0) "" "    No changes."))))
 821
 822(defun git-get-filenames (files)
 823  (mapcar (lambda (info) (git-fileinfo->name info)) files))
 824
 825(defun git-update-index (index-file files)
 826  "Run git-update-index on a list of files."
 827  (let ((env (and index-file `(("GIT_INDEX_FILE" . ,index-file))))
 828        added deleted modified)
 829    (dolist (info files)
 830      (case (git-fileinfo->state info)
 831        ('added (push info added))
 832        ('deleted (push info deleted))
 833        ('modified (push info modified))))
 834    (when added
 835      (apply #'git-call-process-env nil env "update-index" "--add" "--" (git-get-filenames added)))
 836    (when deleted
 837      (apply #'git-call-process-env nil env "update-index" "--remove" "--" (git-get-filenames deleted)))
 838    (when modified
 839      (apply #'git-call-process-env nil env "update-index" "--" (git-get-filenames modified)))))
 840
 841(defun git-run-pre-commit-hook ()
 842  "Run the pre-commit hook if any."
 843  (unless git-status (error "Not in git-status buffer."))
 844  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
 845    (or (not files)
 846        (not (file-executable-p ".git/hooks/pre-commit"))
 847        (let ((index-file (make-temp-file "gitidx")))
 848          (unwind-protect
 849            (let ((head-tree (unless (git-empty-db-p) (git-rev-parse "HEAD^{tree}"))))
 850              (git-read-tree head-tree index-file)
 851              (git-update-index index-file files)
 852              (git-run-hook "pre-commit" `(("GIT_INDEX_FILE" . ,index-file))))
 853          (delete-file index-file))))))
 854
 855(defun git-do-commit ()
 856  "Perform the actual commit using the current buffer as log message."
 857  (interactive)
 858  (let ((buffer (current-buffer))
 859        (index-file (make-temp-file "gitidx")))
 860    (with-current-buffer log-edit-parent-buffer
 861      (if (git-marked-files-state 'unmerged)
 862          (message "You cannot commit unmerged files, resolve them first.")
 863        (unwind-protect
 864            (let ((files (git-marked-files-state 'added 'deleted 'modified))
 865                  head head-tree)
 866              (unless (git-empty-db-p)
 867                (setq head (git-rev-parse "HEAD")
 868                      head-tree (git-rev-parse "HEAD^{tree}")))
 869              (if files
 870                  (progn
 871                    (message "Running git commit...")
 872                    (git-read-tree head-tree index-file)
 873                    (git-update-index nil files)         ;update both the default index
 874                    (git-update-index index-file files)  ;and the temporary one
 875                    (let ((tree (git-write-tree index-file)))
 876                      (if (or (not (string-equal tree head-tree))
 877                              (yes-or-no-p "The tree was not modified, do you really want to perform an empty commit? "))
 878                          (let ((commit (git-commit-tree buffer tree head)))
 879                            (when commit
 880                              (condition-case nil (delete-file ".git/MERGE_HEAD") (error nil))
 881                              (condition-case nil (delete-file ".git/MERGE_MSG") (error nil))
 882                              (with-current-buffer buffer (erase-buffer))
 883                              (git-update-status-files (git-get-filenames files) 'uptodate)
 884                              (git-call-process-env nil nil "rerere")
 885                              (git-call-process-env nil nil "gc" "--auto")
 886                              (git-refresh-files)
 887                              (git-refresh-ewoc-hf git-status)
 888                              (message "Committed %s." commit)
 889                              (git-run-hook "post-commit" nil)))
 890                        (message "Commit aborted."))))
 891                (message "No files to commit.")))
 892          (delete-file index-file))))))
 893
 894
 895;;;; Interactive functions
 896;;;; ------------------------------------------------------------
 897
 898(defun git-mark-file ()
 899  "Mark the file that the cursor is on and move to the next one."
 900  (interactive)
 901  (unless git-status (error "Not in git-status buffer."))
 902  (let* ((pos (ewoc-locate git-status))
 903         (info (ewoc-data pos)))
 904    (setf (git-fileinfo->marked info) t)
 905    (ewoc-invalidate git-status pos)
 906    (ewoc-goto-next git-status 1)))
 907
 908(defun git-unmark-file ()
 909  "Unmark the file that the cursor is on and move to the next one."
 910  (interactive)
 911  (unless git-status (error "Not in git-status buffer."))
 912  (let* ((pos (ewoc-locate git-status))
 913         (info (ewoc-data pos)))
 914    (setf (git-fileinfo->marked info) nil)
 915    (ewoc-invalidate git-status pos)
 916    (ewoc-goto-next git-status 1)))
 917
 918(defun git-unmark-file-up ()
 919  "Unmark the file that the cursor is on and move to the previous one."
 920  (interactive)
 921  (unless git-status (error "Not in git-status buffer."))
 922  (let* ((pos (ewoc-locate git-status))
 923         (info (ewoc-data pos)))
 924    (setf (git-fileinfo->marked info) nil)
 925    (ewoc-invalidate git-status pos)
 926    (ewoc-goto-prev git-status 1)))
 927
 928(defun git-mark-all ()
 929  "Mark all files."
 930  (interactive)
 931  (unless git-status (error "Not in git-status buffer."))
 932  (ewoc-map (lambda (info) (unless (git-fileinfo->marked info)
 933                             (setf (git-fileinfo->marked info) t))) git-status)
 934  ; move back to goal column after invalidate
 935  (when goal-column (move-to-column goal-column)))
 936
 937(defun git-unmark-all ()
 938  "Unmark all files."
 939  (interactive)
 940  (unless git-status (error "Not in git-status buffer."))
 941  (ewoc-map (lambda (info) (when (git-fileinfo->marked info)
 942                             (setf (git-fileinfo->marked info) nil)
 943                             t)) git-status)
 944  ; move back to goal column after invalidate
 945  (when goal-column (move-to-column goal-column)))
 946
 947(defun git-toggle-all-marks ()
 948  "Toggle all file marks."
 949  (interactive)
 950  (unless git-status (error "Not in git-status buffer."))
 951  (ewoc-map (lambda (info) (setf (git-fileinfo->marked info) (not (git-fileinfo->marked info))) t) git-status)
 952  ; move back to goal column after invalidate
 953  (when goal-column (move-to-column goal-column)))
 954
 955(defun git-next-file (&optional n)
 956  "Move the selection down N files."
 957  (interactive "p")
 958  (unless git-status (error "Not in git-status buffer."))
 959  (ewoc-goto-next git-status n))
 960
 961(defun git-prev-file (&optional n)
 962  "Move the selection up N files."
 963  (interactive "p")
 964  (unless git-status (error "Not in git-status buffer."))
 965  (ewoc-goto-prev git-status n))
 966
 967(defun git-next-unmerged-file (&optional n)
 968  "Move the selection down N unmerged files."
 969  (interactive "p")
 970  (unless git-status (error "Not in git-status buffer."))
 971  (let* ((last (ewoc-locate git-status))
 972         (node (ewoc-next git-status last)))
 973    (while (and node (> n 0))
 974      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 975        (setq n (1- n))
 976        (setq last node))
 977      (setq node (ewoc-next git-status node)))
 978    (ewoc-goto-node git-status last)))
 979
 980(defun git-prev-unmerged-file (&optional n)
 981  "Move the selection up N unmerged files."
 982  (interactive "p")
 983  (unless git-status (error "Not in git-status buffer."))
 984  (let* ((last (ewoc-locate git-status))
 985         (node (ewoc-prev git-status last)))
 986    (while (and node (> n 0))
 987      (when (eq 'unmerged (git-fileinfo->state (ewoc-data node)))
 988        (setq n (1- n))
 989        (setq last node))
 990      (setq node (ewoc-prev git-status node)))
 991    (ewoc-goto-node git-status last)))
 992
 993(defun git-add-file ()
 994  "Add marked file(s) to the index cache."
 995  (interactive)
 996  (let ((files (git-get-filenames (git-marked-files-state 'unknown 'ignored))))
 997    ;; FIXME: add support for directories
 998    (unless files
 999      (push (file-relative-name (read-file-name "File to add: " nil nil t)) files))
1000    (when (apply 'git-call-process-display-error "update-index" "--add" "--" files)
1001      (git-update-status-files files 'uptodate)
1002      (git-success-message "Added" files))))
1003
1004(defun git-ignore-file ()
1005  "Add marked file(s) to the ignore list."
1006  (interactive)
1007  (let ((files (git-get-filenames (git-marked-files-state 'unknown))))
1008    (unless files
1009      (push (file-relative-name (read-file-name "File to ignore: " nil nil t)) files))
1010    (dolist (f files) (git-append-to-ignore f))
1011    (git-update-status-files files 'ignored)
1012    (git-success-message "Ignored" files)))
1013
1014(defun git-remove-file ()
1015  "Remove the marked file(s)."
1016  (interactive)
1017  (let ((files (git-get-filenames (git-marked-files-state 'added 'modified 'unknown 'uptodate 'ignored))))
1018    (unless files
1019      (push (file-relative-name (read-file-name "File to remove: " nil nil t)) files))
1020    (if (yes-or-no-p
1021         (format "Remove %d file%s? " (length files) (if (> (length files) 1) "s" "")))
1022        (progn
1023          (dolist (name files)
1024            (ignore-errors
1025              (if (file-directory-p name)
1026                  (delete-directory name)
1027                (delete-file name))))
1028          (when (apply 'git-call-process-display-error "update-index" "--remove" "--" files)
1029            (git-update-status-files files nil)
1030            (git-success-message "Removed" files)))
1031      (message "Aborting"))))
1032
1033(defun git-revert-file ()
1034  "Revert changes to the marked file(s)."
1035  (interactive)
1036  (let ((files (git-marked-files-state 'added 'deleted 'modified 'unmerged))
1037        added modified)
1038    (when (and files
1039               (yes-or-no-p
1040                (format "Revert %d file%s? " (length files) (if (> (length files) 1) "s" ""))))
1041      (dolist (info files)
1042        (case (git-fileinfo->state info)
1043          ('added (push (git-fileinfo->name info) added))
1044          ('deleted (push (git-fileinfo->name info) modified))
1045          ('unmerged (push (git-fileinfo->name info) modified))
1046          ('modified (push (git-fileinfo->name info) modified))))
1047      ;; check if a buffer contains one of the files and isn't saved
1048      (dolist (file modified)
1049        (let ((buffer (get-file-buffer file)))
1050          (when (and buffer (buffer-modified-p buffer))
1051            (error "Buffer %s is modified. Please kill or save modified buffers before reverting." (buffer-name buffer)))))
1052      (let ((ok (and
1053                 (or (not added)
1054                     (apply 'git-call-process-display-error "update-index" "--force-remove" "--" added))
1055                 (or (not modified)
1056                     (apply 'git-call-process-display-error "checkout" "HEAD" modified)))))
1057        (git-update-status-files (append added modified) 'uptodate)
1058        (when ok
1059          (dolist (file modified)
1060            (let ((buffer (get-file-buffer file)))
1061              (when buffer (with-current-buffer buffer (revert-buffer t t t)))))
1062          (git-success-message "Reverted" (git-get-filenames files)))))))
1063
1064(defun git-resolve-file ()
1065  "Resolve conflicts in marked file(s)."
1066  (interactive)
1067  (let ((files (git-get-filenames (git-marked-files-state 'unmerged))))
1068    (when files
1069      (when (apply 'git-call-process-display-error "update-index" "--" files)
1070        (git-update-status-files files 'uptodate)
1071        (git-success-message "Resolved" files)))))
1072
1073(defun git-remove-handled ()
1074  "Remove handled files from the status list."
1075  (interactive)
1076  (ewoc-filter git-status
1077               (lambda (info)
1078                 (case (git-fileinfo->state info)
1079                   ('ignored git-show-ignored)
1080                   ('uptodate git-show-uptodate)
1081                   ('unknown git-show-unknown)
1082                   (t t))))
1083  (unless (ewoc-nth git-status 0)  ; refresh header if list is empty
1084    (git-refresh-ewoc-hf git-status)))
1085
1086(defun git-toggle-show-uptodate ()
1087  "Toogle the option for showing up-to-date files."
1088  (interactive)
1089  (if (setq git-show-uptodate (not git-show-uptodate))
1090      (git-refresh-status)
1091    (git-remove-handled)))
1092
1093(defun git-toggle-show-ignored ()
1094  "Toogle the option for showing ignored files."
1095  (interactive)
1096  (if (setq git-show-ignored (not git-show-ignored))
1097      (progn
1098        (message "Inserting ignored files...")
1099        (git-run-ls-files-with-excludes git-status nil 'ignored "-o" "-i")
1100        (git-refresh-files)
1101        (git-refresh-ewoc-hf git-status)
1102        (message "Inserting ignored files...done"))
1103    (git-remove-handled)))
1104
1105(defun git-toggle-show-unknown ()
1106  "Toogle the option for showing unknown files."
1107  (interactive)
1108  (if (setq git-show-unknown (not git-show-unknown))
1109      (progn
1110        (message "Inserting unknown files...")
1111        (git-run-ls-files-with-excludes git-status nil 'unknown "-o")
1112        (git-refresh-files)
1113        (git-refresh-ewoc-hf git-status)
1114        (message "Inserting unknown files...done"))
1115    (git-remove-handled)))
1116
1117(defun git-expand-directory (info)
1118  "Expand the directory represented by INFO to list its files."
1119  (when (eq (lsh (git-fileinfo->new-perm info) -9) ?\110)
1120    (let ((dir (git-fileinfo->name info)))
1121      (git-set-filenames-state git-status (list dir) nil)
1122      (git-run-ls-files-with-excludes git-status (list (concat dir "/")) 'unknown "-o")
1123      (git-refresh-files)
1124      (git-refresh-ewoc-hf git-status)
1125      t)))
1126
1127(defun git-setup-diff-buffer (buffer)
1128  "Setup a buffer for displaying a diff."
1129  (let ((dir default-directory))
1130    (with-current-buffer buffer
1131      (diff-mode)
1132      (goto-char (point-min))
1133      (setq default-directory dir)
1134      (setq buffer-read-only t)))
1135  (display-buffer buffer)
1136  ; shrink window only if it displays the status buffer
1137  (when (eq (window-buffer) (current-buffer))
1138    (shrink-window-if-larger-than-buffer)))
1139
1140(defun git-diff-file ()
1141  "Diff the marked file(s) against HEAD."
1142  (interactive)
1143  (let ((files (git-marked-files)))
1144    (git-setup-diff-buffer
1145     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M" "HEAD" "--" (git-get-filenames files)))))
1146
1147(defun git-diff-file-merge-head (arg)
1148  "Diff the marked file(s) against the first merge head (or the nth one with a numeric prefix)."
1149  (interactive "p")
1150  (let ((files (git-marked-files))
1151        (merge-heads (git-get-merge-heads)))
1152    (unless merge-heads (error "No merge in progress"))
1153    (git-setup-diff-buffer
1154     (apply #'git-run-command-buffer "*git-diff*" "diff-index" "-p" "-M"
1155            (or (nth (1- arg) merge-heads) "HEAD") "--" (git-get-filenames files)))))
1156
1157(defun git-diff-unmerged-file (stage)
1158  "Diff the marked unmerged file(s) against the specified stage."
1159  (let ((files (git-marked-files)))
1160    (git-setup-diff-buffer
1161     (apply #'git-run-command-buffer "*git-diff*" "diff-files" "-p" stage "--" (git-get-filenames files)))))
1162
1163(defun git-diff-file-base ()
1164  "Diff the marked unmerged file(s) against the common base file."
1165  (interactive)
1166  (git-diff-unmerged-file "-1"))
1167
1168(defun git-diff-file-mine ()
1169  "Diff the marked unmerged file(s) against my pre-merge version."
1170  (interactive)
1171  (git-diff-unmerged-file "-2"))
1172
1173(defun git-diff-file-other ()
1174  "Diff the marked unmerged file(s) against the other's pre-merge version."
1175  (interactive)
1176  (git-diff-unmerged-file "-3"))
1177
1178(defun git-diff-file-combined ()
1179  "Do a combined diff of the marked unmerged file(s)."
1180  (interactive)
1181  (git-diff-unmerged-file "-c"))
1182
1183(defun git-diff-file-idiff ()
1184  "Perform an interactive diff on the current file."
1185  (interactive)
1186  (let ((files (git-marked-files-state 'added 'deleted 'modified)))
1187    (unless (eq 1 (length files))
1188      (error "Cannot perform an interactive diff on multiple files."))
1189    (let* ((filename (car (git-get-filenames files)))
1190           (buff1 (find-file-noselect filename))
1191           (buff2 (git-run-command-buffer (concat filename ".~HEAD~") "cat-file" "blob" (concat "HEAD:" filename))))
1192      (ediff-buffers buff1 buff2))))
1193
1194(defun git-log-file ()
1195  "Display a log of changes to the marked file(s)."
1196  (interactive)
1197  (let* ((files (git-marked-files))
1198         (coding-system-for-read git-commits-coding-system)
1199         (buffer (apply #'git-run-command-buffer "*git-log*" "rev-list" "--pretty" "HEAD" "--" (git-get-filenames files))))
1200    (with-current-buffer buffer
1201      ; (git-log-mode)  FIXME: implement log mode
1202      (goto-char (point-min))
1203      (setq buffer-read-only t))
1204    (display-buffer buffer)))
1205
1206(defun git-log-edit-files ()
1207  "Return a list of marked files for use in the log-edit buffer."
1208  (with-current-buffer log-edit-parent-buffer
1209    (git-get-filenames (git-marked-files-state 'added 'deleted 'modified))))
1210
1211(defun git-log-edit-diff ()
1212  "Run a diff of the current files being committed from a log-edit buffer."
1213  (with-current-buffer log-edit-parent-buffer
1214    (git-diff-file)))
1215
1216(defun git-append-sign-off (name email)
1217  "Append a Signed-off-by entry to the current buffer, avoiding duplicates."
1218  (let ((sign-off (format "Signed-off-by: %s <%s>" name email))
1219        (case-fold-search t))
1220    (goto-char (point-min))
1221    (unless (re-search-forward (concat "^" (regexp-quote sign-off)) nil t)
1222      (goto-char (point-min))
1223      (unless (re-search-forward "^Signed-off-by: " nil t)
1224        (setq sign-off (concat "\n" sign-off)))
1225      (goto-char (point-max))
1226      (insert sign-off "\n"))))
1227
1228(defun git-setup-log-buffer (buffer &optional author-name author-email subject date msg)
1229  "Setup the log buffer for a commit."
1230  (unless git-status (error "Not in git-status buffer."))
1231  (let ((merge-heads (git-get-merge-heads))
1232        (dir default-directory)
1233        (committer-name (git-get-committer-name))
1234        (committer-email (git-get-committer-email))
1235        (sign-off git-append-signed-off-by))
1236    (with-current-buffer buffer
1237      (cd dir)
1238      (erase-buffer)
1239      (insert
1240       (propertize
1241        (format "Author: %s <%s>\n%s%s"
1242                (or author-name committer-name)
1243                (or author-email committer-email)
1244                (if date (format "Date: %s\n" date) "")
1245                (if merge-heads
1246                    (format "Parent: %s\n%s\n"
1247                            (git-rev-parse "HEAD")
1248                            (mapconcat (lambda (str) (concat "Parent: " str)) merge-heads "\n"))
1249                  ""))
1250        'face 'git-header-face)
1251       (propertize git-log-msg-separator 'face 'git-separator-face)
1252       "\n")
1253      (when subject (insert subject "\n\n"))
1254      (cond (msg (insert msg "\n"))
1255            ((file-readable-p ".dotest/msg")
1256             (insert-file-contents ".dotest/msg"))
1257            ((file-readable-p ".git/MERGE_MSG")
1258             (insert-file-contents ".git/MERGE_MSG")))
1259      ; delete empty lines at end
1260      (goto-char (point-min))
1261      (when (re-search-forward "\n+\\'" nil t)
1262        (replace-match "\n" t t))
1263      (when sign-off (git-append-sign-off committer-name committer-email)))
1264    buffer))
1265
1266(defun git-commit-file ()
1267  "Commit the marked file(s), asking for a commit message."
1268  (interactive)
1269  (unless git-status (error "Not in git-status buffer."))
1270  (when (git-run-pre-commit-hook)
1271    (let ((buffer (get-buffer-create "*git-commit*"))
1272          (coding-system (git-get-commits-coding-system))
1273          author-name author-email subject date)
1274      (when (eq 0 (buffer-size buffer))
1275        (when (file-readable-p ".dotest/info")
1276          (with-temp-buffer
1277            (insert-file-contents ".dotest/info")
1278            (goto-char (point-min))
1279            (when (re-search-forward "^Author: \\(.*\\)\nEmail: \\(.*\\)$" nil t)
1280              (setq author-name (match-string 1))
1281              (setq author-email (match-string 2)))
1282            (goto-char (point-min))
1283            (when (re-search-forward "^Subject: \\(.*\\)$" nil t)
1284              (setq subject (match-string 1)))
1285            (goto-char (point-min))
1286            (when (re-search-forward "^Date: \\(.*\\)$" nil t)
1287              (setq date (match-string 1)))))
1288        (git-setup-log-buffer buffer author-name author-email subject date))
1289      (if (boundp 'log-edit-diff-function)
1290          (log-edit 'git-do-commit nil '((log-edit-listfun . git-log-edit-files)
1291                                         (log-edit-diff-function . git-log-edit-diff)) buffer)
1292        (log-edit 'git-do-commit nil 'git-log-edit-files buffer))
1293      (setq font-lock-keywords (font-lock-compile-keywords git-log-edit-font-lock-keywords))
1294      (setq buffer-file-coding-system coding-system)
1295      (re-search-forward (regexp-quote (concat git-log-msg-separator "\n")) nil t))))
1296
1297(defun git-setup-commit-buffer (commit)
1298  "Setup the commit buffer with the contents of COMMIT."
1299  (let (author-name author-email subject date msg)
1300    (with-temp-buffer
1301      (let ((coding-system (git-get-logoutput-coding-system)))
1302        (git-call-process-env t nil "log" "-1" commit)
1303        (goto-char (point-min))
1304        (when (re-search-forward "^Author: *\\(.*\\) <\\(.*\\)>$" nil t)
1305          (setq author-name (match-string 1))
1306          (setq author-email (match-string 2)))
1307        (when (re-search-forward "^Date: *\\(.*\\)$" nil t)
1308          (setq date (match-string 1)))
1309        (while (re-search-forward "^    \\(.*\\)$" nil t)
1310          (push (match-string 1) msg))
1311        (setq msg (nreverse msg))
1312        (setq subject (pop msg))
1313        (while (and msg (zerop (length (car msg))) (pop msg)))))
1314    (git-setup-log-buffer (get-buffer-create "*git-commit*")
1315                          author-name author-email subject date
1316                          (mapconcat #'identity msg "\n"))))
1317
1318(defun git-get-commit-files (commit)
1319  "Retrieve the list of files modified by COMMIT."
1320  (let (files)
1321    (with-temp-buffer
1322      (git-call-process-env t nil "diff-tree" "-r" "-z" "--name-only" "--no-commit-id" commit)
1323      (goto-char (point-min))
1324      (while (re-search-forward "\\([^\0]*\\)\0" nil t 1)
1325        (push (match-string 1) files)))
1326    files))
1327
1328(defun git-amend-commit ()
1329  "Undo the last commit on HEAD, and set things up to commit an
1330amended version of it."
1331  (interactive)
1332  (unless git-status (error "Not in git-status buffer."))
1333  (when (git-empty-db-p) (error "No commit to amend."))
1334  (let* ((commit (git-rev-parse "HEAD"))
1335         (files (git-get-commit-files commit)))
1336    (when (git-call-process-display-error "reset" "--soft" "HEAD^")
1337      (git-update-status-files (copy-sequence files) 'uptodate)
1338      (git-mark-files git-status files)
1339      (git-refresh-files)
1340      (git-setup-commit-buffer commit)
1341      (git-commit-file))))
1342
1343(defun git-find-file ()
1344  "Visit the current file in its own buffer."
1345  (interactive)
1346  (unless git-status (error "Not in git-status buffer."))
1347  (let ((info (ewoc-data (ewoc-locate git-status))))
1348    (unless (git-expand-directory info)
1349      (find-file (git-fileinfo->name info))
1350      (when (eq 'unmerged (git-fileinfo->state info))
1351        (smerge-mode 1)))))
1352
1353(defun git-find-file-other-window ()
1354  "Visit the current file in its own buffer in another window."
1355  (interactive)
1356  (unless git-status (error "Not in git-status buffer."))
1357  (let ((info (ewoc-data (ewoc-locate git-status))))
1358    (find-file-other-window (git-fileinfo->name info))
1359    (when (eq 'unmerged (git-fileinfo->state info))
1360      (smerge-mode))))
1361
1362(defun git-find-file-imerge ()
1363  "Visit the current file in interactive merge mode."
1364  (interactive)
1365  (unless git-status (error "Not in git-status buffer."))
1366  (let ((info (ewoc-data (ewoc-locate git-status))))
1367    (find-file (git-fileinfo->name info))
1368    (smerge-ediff)))
1369
1370(defun git-view-file ()
1371  "View the current file in its own buffer."
1372  (interactive)
1373  (unless git-status (error "Not in git-status buffer."))
1374  (let ((info (ewoc-data (ewoc-locate git-status))))
1375    (view-file (git-fileinfo->name info))))
1376
1377(defun git-refresh-status ()
1378  "Refresh the git status buffer."
1379  (interactive)
1380  (let* ((status git-status)
1381         (pos (ewoc-locate status))
1382         (marked-files (git-get-filenames (ewoc-collect status (lambda (info) (git-fileinfo->marked info)))))
1383         (cur-name (and pos (git-fileinfo->name (ewoc-data pos)))))
1384    (unless status (error "Not in git-status buffer."))
1385    (message "Refreshing git status...")
1386    (git-call-process-env nil nil "update-index" "--refresh")
1387    (git-clear-status status)
1388    (git-update-status-files nil)
1389    ; restore file marks
1390    (when marked-files
1391      (git-status-filenames-map status
1392                                (lambda (info)
1393                                        (setf (git-fileinfo->marked info) t)
1394                                        (setf (git-fileinfo->needs-refresh info) t))
1395                                marked-files)
1396      (git-refresh-files))
1397    ; move point to the current file name if any
1398    (message "Refreshing git status...done")
1399    (let ((node (and cur-name (git-find-status-file status cur-name))))
1400      (when node (ewoc-goto-node status node)))))
1401
1402(defun git-status-quit ()
1403  "Quit git-status mode."
1404  (interactive)
1405  (bury-buffer))
1406
1407;;;; Major Mode
1408;;;; ------------------------------------------------------------
1409
1410(defvar git-status-mode-hook nil
1411  "Run after `git-status-mode' is setup.")
1412
1413(defvar git-status-mode-map nil
1414  "Keymap for git major mode.")
1415
1416(defvar git-status nil
1417  "List of all files managed by the git-status mode.")
1418
1419(unless git-status-mode-map
1420  (let ((map (make-keymap))
1421        (commit-map (make-sparse-keymap))
1422        (diff-map (make-sparse-keymap))
1423        (toggle-map (make-sparse-keymap)))
1424    (suppress-keymap map)
1425    (define-key map "?"   'git-help)
1426    (define-key map "h"   'git-help)
1427    (define-key map " "   'git-next-file)
1428    (define-key map "a"   'git-add-file)
1429    (define-key map "c"   'git-commit-file)
1430    (define-key map "\C-c" commit-map)
1431    (define-key map "d"    diff-map)
1432    (define-key map "="   'git-diff-file)
1433    (define-key map "f"   'git-find-file)
1434    (define-key map "\r"  'git-find-file)
1435    (define-key map "g"   'git-refresh-status)
1436    (define-key map "i"   'git-ignore-file)
1437    (define-key map "l"   'git-log-file)
1438    (define-key map "m"   'git-mark-file)
1439    (define-key map "M"   'git-mark-all)
1440    (define-key map "n"   'git-next-file)
1441    (define-key map "N"   'git-next-unmerged-file)
1442    (define-key map "o"   'git-find-file-other-window)
1443    (define-key map "p"   'git-prev-file)
1444    (define-key map "P"   'git-prev-unmerged-file)
1445    (define-key map "q"   'git-status-quit)
1446    (define-key map "r"   'git-remove-file)
1447    (define-key map "R"   'git-resolve-file)
1448    (define-key map "t"    toggle-map)
1449    (define-key map "T"   'git-toggle-all-marks)
1450    (define-key map "u"   'git-unmark-file)
1451    (define-key map "U"   'git-revert-file)
1452    (define-key map "v"   'git-view-file)
1453    (define-key map "x"   'git-remove-handled)
1454    (define-key map "\C-?" 'git-unmark-file-up)
1455    (define-key map "\M-\C-?" 'git-unmark-all)
1456    ; the commit submap
1457    (define-key commit-map "\C-a" 'git-amend-commit)
1458    ; the diff submap
1459    (define-key diff-map "b" 'git-diff-file-base)
1460    (define-key diff-map "c" 'git-diff-file-combined)
1461    (define-key diff-map "=" 'git-diff-file)
1462    (define-key diff-map "e" 'git-diff-file-idiff)
1463    (define-key diff-map "E" 'git-find-file-imerge)
1464    (define-key diff-map "h" 'git-diff-file-merge-head)
1465    (define-key diff-map "m" 'git-diff-file-mine)
1466    (define-key diff-map "o" 'git-diff-file-other)
1467    ; the toggle submap
1468    (define-key toggle-map "u" 'git-toggle-show-uptodate)
1469    (define-key toggle-map "i" 'git-toggle-show-ignored)
1470    (define-key toggle-map "k" 'git-toggle-show-unknown)
1471    (define-key toggle-map "m" 'git-toggle-all-marks)
1472    (setq git-status-mode-map map))
1473  (easy-menu-define git-menu git-status-mode-map
1474    "Git Menu"
1475    `("Git"
1476      ["Refresh" git-refresh-status t]
1477      ["Commit" git-commit-file t]
1478      ("Merge"
1479        ["Next Unmerged File" git-next-unmerged-file t]
1480        ["Prev Unmerged File" git-prev-unmerged-file t]
1481        ["Mark as Resolved" git-resolve-file t]
1482        ["Interactive Merge File" git-find-file-imerge t]
1483        ["Diff Against Common Base File" git-diff-file-base t]
1484        ["Diff Combined" git-diff-file-combined t]
1485        ["Diff Against Merge Head" git-diff-file-merge-head t]
1486        ["Diff Against Mine" git-diff-file-mine t]
1487        ["Diff Against Other" git-diff-file-other t])
1488      "--------"
1489      ["Add File" git-add-file t]
1490      ["Revert File" git-revert-file t]
1491      ["Ignore File" git-ignore-file t]
1492      ["Remove File" git-remove-file t]
1493      "--------"
1494      ["Find File" git-find-file t]
1495      ["View File" git-view-file t]
1496      ["Diff File" git-diff-file t]
1497      ["Interactive Diff File" git-diff-file-idiff t]
1498      ["Log" git-log-file t]
1499      "--------"
1500      ["Mark" git-mark-file t]
1501      ["Mark All" git-mark-all t]
1502      ["Unmark" git-unmark-file t]
1503      ["Unmark All" git-unmark-all t]
1504      ["Toggle All Marks" git-toggle-all-marks t]
1505      ["Hide Handled Files" git-remove-handled t]
1506      "--------"
1507      ["Show Uptodate Files" git-toggle-show-uptodate :style toggle :selected git-show-uptodate]
1508      ["Show Ignored Files" git-toggle-show-ignored :style toggle :selected git-show-ignored]
1509      ["Show Unknown Files" git-toggle-show-unknown :style toggle :selected git-show-unknown]
1510      "--------"
1511      ["Quit" git-status-quit t])))
1512
1513
1514;; git mode should only run in the *git status* buffer
1515(put 'git-status-mode 'mode-class 'special)
1516
1517(defun git-status-mode ()
1518  "Major mode for interacting with Git.
1519Commands:
1520\\{git-status-mode-map}"
1521  (kill-all-local-variables)
1522  (buffer-disable-undo)
1523  (setq mode-name "git status"
1524        major-mode 'git-status-mode
1525        goal-column 17
1526        buffer-read-only t)
1527  (use-local-map git-status-mode-map)
1528  (let ((buffer-read-only nil))
1529    (erase-buffer)
1530  (let ((status (ewoc-create 'git-fileinfo-prettyprint "" "")))
1531    (set (make-local-variable 'git-status) status))
1532  (set (make-local-variable 'list-buffers-directory) default-directory)
1533  (make-local-variable 'git-show-uptodate)
1534  (make-local-variable 'git-show-ignored)
1535  (make-local-variable 'git-show-unknown)
1536  (run-hooks 'git-status-mode-hook)))
1537
1538(defun git-find-status-buffer (dir)
1539  "Find the git status buffer handling a specified directory."
1540  (let ((list (buffer-list))
1541        (fulldir (expand-file-name dir))
1542        found)
1543    (while (and list (not found))
1544      (let ((buffer (car list)))
1545        (with-current-buffer buffer
1546          (when (and list-buffers-directory
1547                     (string-equal fulldir (expand-file-name list-buffers-directory))
1548                     (eq major-mode 'git-status-mode))
1549            (setq found buffer))))
1550      (setq list (cdr list)))
1551    found))
1552
1553(defun git-status (dir)
1554  "Entry point into git-status mode."
1555  (interactive "DSelect directory: ")
1556  (setq dir (git-get-top-dir dir))
1557  (if (file-directory-p (concat (file-name-as-directory dir) ".git"))
1558      (let ((buffer (or (and git-reuse-status-buffer (git-find-status-buffer dir))
1559                        (create-file-buffer (expand-file-name "*git-status*" dir)))))
1560        (switch-to-buffer buffer)
1561        (cd dir)
1562        (git-status-mode)
1563        (git-refresh-status)
1564        (goto-char (point-min))
1565        (add-hook 'after-save-hook 'git-update-saved-file))
1566    (message "%s is not a git working tree." dir)))
1567
1568(defun git-update-saved-file ()
1569  "Update the corresponding git-status buffer when a file is saved.
1570Meant to be used in `after-save-hook'."
1571  (let* ((file (expand-file-name buffer-file-name))
1572         (dir (condition-case nil (git-get-top-dir (file-name-directory file)) (error nil)))
1573         (buffer (and dir (git-find-status-buffer dir))))
1574    (when buffer
1575      (with-current-buffer buffer
1576        (let ((filename (file-relative-name file dir)))
1577          ; skip files located inside the .git directory
1578          (unless (string-match "^\\.git/" filename)
1579            (git-call-process-env nil nil "add" "--refresh" "--" filename)
1580            (git-update-status-files (list filename) 'uptodate)))))))
1581
1582(defun git-help ()
1583  "Display help for Git mode."
1584  (interactive)
1585  (describe-function 'git-status-mode))
1586
1587(provide 'git)
1588;;; git.el ends here