mdw@git.distorted.org.uk Git - stgit/blob - contrib/stgit.el

   1 ;; stgit.el: An emacs mode for StGit
   2 ;;
   3 ;; Copyright (C) 2007 David Kågedal <davidk@lysator.liu.se>
   4 ;;
   5 ;; To install: put this file on the load-path and place the following
   6 ;; in your .emacs file:
   7 ;;
   8 ;;    (require 'stgit)
   9 ;;
  10 ;; To start: `M-x stgit'
  11
  12 (when (< emacs-major-version 22)
  13   (error "Emacs older than 22 is not supported by stgit.el"))
  14
  15 (require 'git nil t)
  16 (require 'cl)
  17 (require 'ewoc)
  18
  19 (defun stgit (dir)
  20   "Manage StGit patches for the tree in DIR.
  21
  22 See `stgit-mode' for commands available."
  23   (interactive "DDirectory: \n")
  24   (switch-to-stgit-buffer (git-get-top-dir dir))
  25   (stgit-reload))
  26
  27 (unless (fboundp 'git-get-top-dir)
  28   (defun git-get-top-dir (dir)
  29     "Retrieve the top-level directory of a git tree."
  30     (let ((cdup (with-output-to-string
  31                   (with-current-buffer standard-output
  32                     (cd dir)
  33                     (unless (eq 0 (call-process "git" nil t nil
  34                                                 "rev-parse" "--show-cdup"))
  35                       (error "Cannot find top-level git tree for %s" dir))))))
  36       (expand-file-name (concat (file-name-as-directory dir)
  37                                 (car (split-string cdup "\n")))))))
  38
  39 (defun stgit-refresh-git-status (&optional dir)
  40   "If it exists, refresh the `git-status' buffer belonging to
  41 directory DIR or `default-directory'"
  42   (when (and (fboundp 'git-find-status-buffer)
  43              (fboundp 'git-refresh-status))
  44     (let* ((top-dir (git-get-top-dir (or dir default-directory)))
  45            (git-status-buffer (and top-dir (git-find-status-buffer top-dir))))
  46       (when git-status-buffer
  47         (with-current-buffer git-status-buffer
  48           (git-refresh-status))))))
  49
  50 (defun stgit-find-buffer (dir)
  51   "Return the buffer displaying StGit patches for DIR, or nil if none."
  52   (setq dir (file-name-as-directory dir))
  53   (let ((buffers (buffer-list)))
  54     (while (and buffers
  55                 (not (with-current-buffer (car buffers)
  56                        (and (eq major-mode 'stgit-mode)
  57                             (string= default-directory dir)))))
  58       (setq buffers (cdr buffers)))
  59     (and buffers (car buffers))))
  60
  61 (defun switch-to-stgit-buffer (dir)
  62   "Switch to a (possibly new) buffer displaying StGit patches for DIR."
  63   (setq dir (file-name-as-directory dir))
  64   (let ((buffer (stgit-find-buffer dir)))
  65     (switch-to-buffer (or buffer
  66                           (create-stgit-buffer dir)))))
  67
  68 (defstruct (stgit-patch)
  69   status name desc empty files-ewoc)
  70
  71 (defun stgit-patch-pp (patch)
  72   (let* ((status (stgit-patch-status patch))
  73          (start (point))
  74          (name (stgit-patch-name patch))
  75          (face (cdr (assq status stgit-patch-status-face-alist))))
  76     (insert (case status
  77               ('applied "+")
  78               ('top ">")
  79               ('unapplied "-")
  80               (t " "))
  81             (if (memq name stgit-marked-patches)
  82                 "*" " "))
  83     (if (memq status '(index work))
  84         (insert (propertize (if (eq status 'index) "Index" "Work tree")
  85                             'face face))
  86       (insert (format "%-30s"
  87                       (propertize (symbol-name name)
  88                                   'face face
  89                                   'syntax-table (string-to-syntax "w")))
  90               "  "
  91               (if (stgit-patch-empty patch) "(empty) " "")
  92               (propertize (or (stgit-patch-desc patch) "")
  93                           'face 'stgit-description-face)))
  94     (insert "\n")
  95     (put-text-property start (point) 'entry-type 'patch)
  96     (when (memq name stgit-expanded-patches)
  97       (stgit-insert-patch-files patch))
  98     (put-text-property start (point) 'patch-data patch)))
  99
 100 (defun create-stgit-buffer (dir)
 101   "Create a buffer for showing StGit patches.
 102 Argument DIR is the repository path."
 103   (let ((buf (create-file-buffer (concat dir "*stgit*")))
 104         (inhibit-read-only t))
 105     (with-current-buffer buf
 106       (setq default-directory dir)
 107       (stgit-mode)
 108       (set (make-local-variable 'stgit-ewoc)
 109            (ewoc-create #'stgit-patch-pp "Branch:\n\n" "--\n" t))
 110       (setq buffer-read-only t))
 111     buf))
 112
 113 (defmacro stgit-capture-output (name &rest body)
 114   "Capture StGit output and, if there was any output, show it in a window
 115 at the end.
 116 Returns nil if there was no output."
 117   (declare (debug ([&or stringp null] body))
 118            (indent 1))
 119   `(let ((output-buf (get-buffer-create ,(or name "*StGit output*")))
 120          (stgit-dir default-directory)
 121          (inhibit-read-only t))
 122      (with-current-buffer output-buf
 123        (erase-buffer)
 124        (setq default-directory stgit-dir)
 125        (setq buffer-read-only t))
 126      (let ((standard-output output-buf))
 127        ,@body)
 128      (with-current-buffer output-buf
 129        (set-buffer-modified-p nil)
 130        (setq buffer-read-only t)
 131        (if (< (point-min) (point-max))
 132            (display-buffer output-buf t)))))
 133
 134 (defun stgit-make-run-args (args)
 135   "Return a copy of ARGS with its elements converted to strings."
 136   (mapcar (lambda (x)
 137             ;; don't use (format "%s" ...) to limit type errors
 138             (cond ((stringp x) x)
 139                   ((integerp x) (number-to-string x))
 140                   ((symbolp x) (symbol-name x))
 141                   (t
 142                    (error "Bad element in stgit-make-run-args args: %S" x))))
 143           args))
 144
 145 (defun stgit-run-silent (&rest args)
 146   (setq args (stgit-make-run-args args))
 147   (apply 'call-process "stg" nil standard-output nil args))
 148
 149 (defun stgit-run (&rest args)
 150   (setq args (stgit-make-run-args args))
 151   (let ((msgcmd (mapconcat #'identity args " ")))
 152     (message "Running stg %s..." msgcmd)
 153     (apply 'call-process "stg" nil standard-output nil args)
 154     (message "Running stg %s...done" msgcmd)))
 155
 156 (defun stgit-run-git (&rest args)
 157   (setq args (stgit-make-run-args args))
 158   (let ((msgcmd (mapconcat #'identity args " ")))
 159     (message "Running git %s..." msgcmd)
 160     (apply 'call-process "git" nil standard-output nil args)
 161     (message "Running git %s...done" msgcmd)))
 162
 163 (defun stgit-run-git-silent (&rest args)
 164   (setq args (stgit-make-run-args args))
 165   (apply 'call-process "git" nil standard-output nil args))
 166
 167 (defun stgit-index-empty-p ()
 168   "Returns non-nil if the index contains no changes from HEAD."
 169   (zerop (stgit-run-git-silent "diff-index" "--cached" "--quiet" "HEAD")))
 170
 171 (defun stgit-work-tree-empty-p ()
 172   "Returns non-nil if the work tree contains no changes from index."
 173   (zerop (stgit-run-git-silent "diff-files" "--quiet")))
 174
 175 (defvar stgit-index-node)
 176 (defvar stgit-worktree-node)
 177
 178 (defun stgit-refresh-index ()
 179   (when stgit-index-node
 180     (ewoc-invalidate (car stgit-index-node) (cdr stgit-index-node))))
 181
 182 (defun stgit-refresh-worktree ()
 183   (when stgit-worktree-node
 184     (ewoc-invalidate (car stgit-worktree-node) (cdr stgit-worktree-node))))
 185
 186 (defun stgit-run-series-insert-index (ewoc)
 187   (setq index-node    (cons ewoc (ewoc-enter-last ewoc
 188                                                   (make-stgit-patch
 189                                                    :status 'index
 190                                                    :name :index
 191                                                    :desc nil
 192                                                    :empty nil)))
 193         worktree-node (cons ewoc (ewoc-enter-last ewoc
 194                                                   (make-stgit-patch
 195                                                    :status 'work
 196                                                    :name :work
 197                                                    :desc nil
 198                                                    :empty nil)))))
 199
 200 (defun stgit-run-series (ewoc)
 201   (setq stgit-index-node nil
 202         stgit-worktree-node nil)
 203   (let ((inserted-index (not stgit-show-worktree))
 204         index-node
 205         worktree-node
 206         all-patchsyms)
 207     (with-temp-buffer
 208       (let* ((standard-output (current-buffer))
 209              (exit-status (stgit-run-silent "series"
 210                                             "--description" "--empty")))
 211         (goto-char (point-min))
 212         (if (not (zerop exit-status))
 213             (cond ((looking-at "stg series: \\(.*\\)")
 214                    (setq inserted-index t)
 215                    (ewoc-set-hf ewoc (car (ewoc-get-hf ewoc))
 216                                 (substitute-command-keys
 217                                  "-- not initialized; run \\[stgit-init]")))
 218                   ((looking-at ".*")
 219                    (error "Error running stg: %s"
 220                           (match-string 0))))
 221           (while (not (eobp))
 222             (unless (looking-at
 223                      "\\([0 ]\\)\\([>+-]\\)\\( \\)\\([^ ]+\\) *[|#] \\(.*\\)")
 224               (error "Syntax error in output from stg series"))
 225             (let* ((state-str (match-string 2))
 226                    (state (cond ((string= state-str ">") 'top)
 227                                 ((string= state-str "+") 'applied)
 228                                 ((string= state-str "-") 'unapplied)))
 229                    (name (intern (match-string 4)))
 230                    (desc (match-string 5))
 231                    (empty (string= (match-string 1) "0")))
 232               (unless inserted-index
 233                 (when (or (eq stgit-show-worktree-mode 'top)
 234                           (and (eq stgit-show-worktree-mode 'center)
 235                                (eq state 'unapplied)))
 236                   (setq inserted-index t)
 237                   (stgit-run-series-insert-index ewoc)))
 238               (setq all-patchsyms (cons name all-patchsyms))
 239               (ewoc-enter-last ewoc
 240                                (make-stgit-patch
 241                                 :status state
 242                                 :name   name
 243                                 :desc   desc
 244                                 :empty  empty)))
 245             (forward-line 1))))
 246       (unless inserted-index
 247         (stgit-run-series-insert-index ewoc)))
 248     (setq stgit-index-node    index-node
 249           stgit-worktree-node worktree-node
 250           stgit-marked-patches (intersection stgit-marked-patches
 251                                              all-patchsyms))))
 252
 253 (defun stgit-reload ()
 254   "Update the contents of the StGit buffer."
 255   (interactive)
 256   (let ((inhibit-read-only t)
 257         (curline (line-number-at-pos))
 258         (curpatch (stgit-patch-name-at-point))
 259         (curfile (stgit-patched-file-at-point)))
 260     (ewoc-filter stgit-ewoc #'(lambda (x) nil))
 261     (ewoc-set-hf stgit-ewoc
 262                  (concat "Branch: "
 263                          (propertize
 264                           (substring (with-output-to-string
 265                                        (stgit-run-silent "branch"))
 266                                      0 -1)
 267                           'face 'stgit-branch-name-face)
 268                          "\n\n")
 269                  (if stgit-show-worktree
 270                      "--"
 271                    (propertize
 272                     (substitute-command-keys "--\n\"\\[stgit-toggle-worktree]\"\
 273  shows the working tree\n")
 274                     'face 'stgit-description-face)))
 275     (stgit-run-series stgit-ewoc)
 276     (if curpatch
 277         (stgit-goto-patch curpatch (and curfile (stgit-file-file curfile)))
 278       (goto-line curline)))
 279   (stgit-refresh-git-status))
 280
 281 (defun stgit-set-default (symbol value)
 282   "Set default value of SYMBOL to VALUE using `set-default' and
 283 reload all StGit buffers."
 284   (set-default symbol value)
 285   (dolist (buf (buffer-list))
 286     (with-current-buffer buf
 287       (when (eq major-mode 'stgit-mode)
 288         (stgit-reload)))))
 289
 290 (defgroup stgit nil
 291   "A user interface for the StGit patch maintenance tool."
 292   :group 'tools
 293   :link '(function-link stgit)
 294   :link '(url-link "http://www.procode.org/stgit/"))
 295
 296 (defcustom stgit-abbreviate-copies-and-renames t
 297   "If non-nil, abbreviate copies and renames as \"dir/{old -> new}/file\"
 298 instead of \"dir/old/file -> dir/new/file\"."
 299   :type 'boolean
 300   :group 'stgit
 301   :set 'stgit-set-default)
 302
 303 (defcustom stgit-default-show-worktree t
 304   "Set to non-nil to by default show the working tree in a new stgit buffer.
 305
 306 Use \\<stgit-mode-map>\\[stgit-toggle-worktree] to toggle the this setting in an already-started StGit buffer."
 307   :type 'boolean
 308   :group 'stgit
 309   :link '(variable-link stgit-show-worktree))
 310
 311 (defcustom stgit-find-copies-harder nil
 312   "Try harder to find copied files when listing patches.
 313
 314 When not nil, runs git diff-tree with the --find-copies-harder
 315 flag, which reduces performance."
 316   :type 'boolean
 317   :group 'stgit
 318   :set 'stgit-set-default)
 319
 320 (defcustom stgit-show-worktree-mode 'center
 321   "This variable controls where the \"Index\" and \"Work tree\"
 322 will be shown on in the buffer.
 323
 324 It can be set to 'top (above all patches), 'center (show between
 325 applied and unapplied patches), and 'bottom (below all patches)."
 326   :type '(radio (const :tag "above all patches (top)" top)
 327                 (const :tag "between applied and unapplied patches (center)"
 328                        center)
 329                 (const :tag "below all patches (bottom)" bottom))
 330   :group 'stgit
 331   :link '(variable-link stgit-show-worktree)
 332   :set 'stgit-set-default)
 333
 334 (defface stgit-branch-name-face
 335   '((t :inherit bold))
 336   "The face used for the StGit branch name"
 337   :group 'stgit)
 338
 339 (defface stgit-top-patch-face
 340   '((((background dark)) (:weight bold :foreground "yellow"))
 341     (((background light)) (:weight bold :foreground "purple"))
 342     (t (:weight bold)))
 343   "The face used for the top patch names"
 344   :group 'stgit)
 345
 346 (defface stgit-applied-patch-face
 347   '((((background dark)) (:foreground "light yellow"))
 348     (((background light)) (:foreground "purple"))
 349     (t ()))
 350   "The face used for applied patch names"
 351   :group 'stgit)
 352
 353 (defface stgit-unapplied-patch-face
 354   '((((background dark)) (:foreground "gray80"))
 355     (((background light)) (:foreground "orchid"))
 356     (t ()))
 357   "The face used for unapplied patch names"
 358   :group 'stgit)
 359
 360 (defface stgit-description-face
 361   '((((background dark)) (:foreground "tan"))
 362     (((background light)) (:foreground "dark red")))
 363   "The face used for StGit descriptions"
 364   :group 'stgit)
 365
 366 (defface stgit-index-work-tree-title-face
 367   '((((supports :slant italic)) :slant italic)
 368     (t :inherit bold))
 369   "StGit mode face used for the \"Index\" and \"Work tree\" titles"
 370   :group 'stgit)
 371
 372 (defface stgit-unmerged-file-face
 373   '((((class color) (background light)) (:foreground "red" :bold t))
 374     (((class color) (background dark)) (:foreground "red" :bold t)))
 375   "StGit mode face used for unmerged file status"
 376   :group 'stgit)
 377
 378 (defface stgit-unknown-file-face
 379   '((((class color) (background light)) (:foreground "goldenrod" :bold t))
 380     (((class color) (background dark)) (:foreground "goldenrod" :bold t)))
 381   "StGit mode face used for unknown file status"
 382   :group 'stgit)
 383
 384 (defface stgit-ignored-file-face
 385   '((((class color) (background light)) (:foreground "grey60"))
 386     (((class color) (background dark)) (:foreground "grey40")))
 387   "StGit mode face used for ignored files")
 388
 389 (defface stgit-file-permission-face
 390   '((((class color) (background light)) (:foreground "green" :bold t))
 391     (((class color) (background dark)) (:foreground "green" :bold t)))
 392   "StGit mode face used for permission changes."
 393   :group 'stgit)
 394
 395 (defface stgit-modified-file-face
 396   '((((class color) (background light)) (:foreground "purple"))
 397     (((class color) (background dark)) (:foreground "salmon")))
 398   "StGit mode face used for modified file status"
 399   :group 'stgit)
 400
 401 (defconst stgit-file-status-code-strings
 402   (mapcar (lambda (arg)
 403             (cons (car arg)
 404                   (propertize (cadr arg) 'face (car (cddr arg)))))
 405           '((add         "Added"       stgit-modified-file-face)
 406             (copy        "Copied"      stgit-modified-file-face)
 407             (delete      "Deleted"     stgit-modified-file-face)
 408             (modify      "Modified"    stgit-modified-file-face)
 409             (rename      "Renamed"     stgit-modified-file-face)
 410             (mode-change "Mode change" stgit-modified-file-face)
 411             (unmerged    "Unmerged"    stgit-unmerged-file-face)
 412             (unknown     "Unknown"     stgit-unknown-file-face)
 413             (ignore      "Ignored"     stgit-ignored-file-face)))
 414   "Alist of code symbols to description strings")
 415
 416 (defconst stgit-patch-status-face-alist
 417   '((applied   . stgit-applied-patch-face)
 418     (top       . stgit-top-patch-face)
 419     (unapplied . stgit-unapplied-patch-face)
 420     (index     . stgit-index-work-tree-title-face)
 421     (work      . stgit-index-work-tree-title-face))
 422   "Alist of face to use for a given patch status")
 423
 424 (defun stgit-file-status-code-as-string (file)
 425   "Return stgit status code for FILE as a string"
 426   (let* ((code (assq (stgit-file-status file)
 427                      stgit-file-status-code-strings))
 428          (score (stgit-file-cr-score file)))
 429     (when code
 430       (format "%-11s  "
 431               (if (and score (/= score 100))
 432                   (format "%s %s" (cdr code)
 433                           (propertize (format "%d%%" score)
 434                                       'face 'stgit-description-face))
 435                 (cdr code))))))
 436
 437 (defun stgit-file-status-code (str &optional score)
 438   "Return stgit status code from git status string"
 439   (let ((code (assoc str '(("A" . add)
 440                            ("C" . copy)
 441                            ("D" . delete)
 442                            ("I" . ignore)
 443                            ("M" . modify)
 444                            ("R" . rename)
 445                            ("T" . mode-change)
 446                            ("U" . unmerged)
 447                            ("X" . unknown)))))
 448     (setq code (if code (cdr code) 'unknown))
 449     (when (stringp score)
 450       (if (> (length score) 0)
 451           (setq score (string-to-number score))
 452         (setq score nil)))
 453     (if score (cons code score) code)))
 454
 455 (defconst stgit-file-type-strings
 456   '((#o100 . "file")
 457     (#o120 . "symlink")
 458     (#o160 . "subproject"))
 459   "Alist of names of file types")
 460
 461 (defun stgit-file-type-string (type)
 462   "Return string describing file type TYPE (the high bits of file permission).
 463 Cf. `stgit-file-type-strings' and `stgit-file-type-change-string'."
 464   (let ((type-str (assoc type stgit-file-type-strings)))
 465     (or (and type-str (cdr type-str))
 466         (format "unknown type %o" type))))
 467
 468 (defun stgit-file-type-change-string (old-perm new-perm)
 469   "Return string describing file type change from OLD-PERM to NEW-PERM.
 470 Cf. `stgit-file-type-string'."
 471   (let ((old-type (lsh old-perm -9))
 472         (new-type (lsh new-perm -9)))
 473     (cond ((= old-type new-type) "")
 474           ((zerop new-type) "")
 475           ((zerop old-type)
 476            (if (= new-type #o100)
 477                ""
 478              (format "   (%s)" (stgit-file-type-string new-type))))
 479           (t (format "   (%s -> %s)"
 480                      (stgit-file-type-string old-type)
 481                      (stgit-file-type-string new-type))))))
 482
 483 (defun stgit-file-mode-change-string (old-perm new-perm)
 484   "Return string describing file mode change from OLD-PERM to NEW-PERM.
 485 Cf. `stgit-file-type-change-string'."
 486   (setq old-perm (logand old-perm #o777)
 487         new-perm (logand new-perm #o777))
 488   (if (or (= old-perm new-perm)
 489           (zerop old-perm)
 490           (zerop new-perm))
 491       ""
 492     (let* ((modified       (logxor old-perm new-perm))
 493            (not-x-modified (logand (logxor old-perm new-perm) #o666)))
 494       (cond ((zerop modified) "")
 495             ((and (zerop not-x-modified)
 496                   (or (and (eq #o111 (logand old-perm #o111))
 497                            (propertize "-x" 'face 'stgit-file-permission-face))
 498                       (and (eq #o111 (logand new-perm #o111))
 499                            (propertize "+x" 'face
 500                                        'stgit-file-permission-face)))))
 501             (t (concat (propertize (format "%o" old-perm)
 502                                    'face 'stgit-file-permission-face)
 503                        (propertize " -> "
 504                                    'face 'stgit-description-face)
 505                        (propertize (format "%o" new-perm)
 506                                    'face 'stgit-file-permission-face)))))))
 507
 508 (defstruct (stgit-file)
 509   old-perm new-perm copy-or-rename cr-score cr-from cr-to status file)
 510
 511 (defun stgit-describe-copy-or-rename (file)
 512   (let ((arrow (concat " " (propertize "->" 'face 'stgit-description-face) " "))
 513         from to common-head common-tail)
 514
 515     (when stgit-abbreviate-copies-and-renames
 516       (setq from (split-string (stgit-file-cr-from file) "/")
 517             to   (split-string (stgit-file-cr-to   file) "/"))
 518
 519       (while (and from to (cdr from) (cdr to)
 520                   (string-equal (car from) (car to)))
 521         (setq common-head (cons (car from) common-head)
 522               from        (cdr from)
 523               to          (cdr to)))
 524       (setq common-head (nreverse common-head)
 525             from        (nreverse from)
 526             to          (nreverse to))
 527       (while (and from to (cdr from) (cdr to)
 528                   (string-equal (car from) (car to)))
 529         (setq common-tail (cons (car from) common-tail)
 530               from        (cdr from)
 531               to          (cdr to)))
 532       (setq from (nreverse from)
 533             to   (nreverse to)))
 534
 535     (if (or common-head common-tail)
 536         (concat (if common-head
 537                     (mapconcat #'identity common-head "/")
 538                   "")
 539                 (if common-head "/" "")
 540                 (propertize "{" 'face 'stgit-description-face)
 541                 (mapconcat #'identity from "/")
 542                 arrow
 543                 (mapconcat #'identity to "/")
 544                 (propertize "}" 'face 'stgit-description-face)
 545                 (if common-tail "/" "")
 546                 (if common-tail
 547                     (mapconcat #'identity common-tail "/")
 548                   ""))
 549       (concat (stgit-file-cr-from file) arrow (stgit-file-cr-to file)))))
 550
 551 (defun stgit-file-pp (file)
 552   (let ((status (stgit-file-status file))
 553         (name (if (stgit-file-copy-or-rename file)
 554                   (stgit-describe-copy-or-rename file)
 555                 (stgit-file-file file)))
 556         (mode-change (stgit-file-mode-change-string
 557                       (stgit-file-old-perm file)
 558                       (stgit-file-new-perm file)))
 559         (start (point)))
 560     (insert (format "    %-12s%s%s%s%s\n"
 561                     (stgit-file-status-code-as-string file)
 562                     mode-change
 563                     (if (zerop (length mode-change)) "" " ")
 564                     name
 565                     (propertize (stgit-file-type-change-string
 566                                  (stgit-file-old-perm file)
 567                                  (stgit-file-new-perm file))
 568                                 'face 'stgit-description-face)))
 569     (add-text-properties start (point)
 570                          (list 'entry-type 'file
 571                                'file-data file))))
 572
 573 (defun stgit-find-copies-harder-diff-arg ()
 574   "Return the flag to use with `git-diff' depending on the
 575 `stgit-find-copies-harder' flag."
 576   (if stgit-find-copies-harder "--find-copies-harder" "-C"))
 577
 578 (defun stgit-insert-ls-files (args file-flag)
 579   (let ((start (point)))
 580     (apply 'stgit-run-git
 581            (append '("ls-files" "--exclude-standard" "-z") args))
 582     (goto-char start)
 583     (while (looking-at "\\([^\0]*\\)\0")
 584       (let ((name-len (- (match-end 0) (match-beginning 0))))
 585         (insert ":0 0 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 " file-flag "\0")
 586         (forward-char name-len)))))
 587
 588 (defun stgit-insert-patch-files (patch)
 589   "Expand (show modification of) the patch PATCH after the line
 590 at point."
 591   (let* ((patchsym (stgit-patch-name patch))
 592          (end      (point-marker))
 593          (args     (list "-z" (stgit-find-copies-harder-diff-arg)))
 594          (ewoc     (ewoc-create #'stgit-file-pp nil nil t)))
 595     (set-marker-insertion-type end t)
 596     (setf (stgit-patch-files-ewoc patch) ewoc)
 597     (with-temp-buffer
 598       (let ((standard-output (current-buffer)))
 599         (apply 'stgit-run-git
 600                (cond ((eq patchsym :work)
 601                       `("diff-files" "-0" ,@args))
 602                      ((eq patchsym :index)
 603                       `("diff-index" ,@args "--cached" "HEAD"))
 604                      (t
 605                       `("diff-tree" ,@args "-r" ,(stgit-id patchsym)))))
 606
 607         (when (and (eq patchsym :work))
 608           (when stgit-show-ignored
 609             (stgit-insert-ls-files '("--ignored" "--others") "I"))
 610           (when stgit-show-unknown
 611             (stgit-insert-ls-files '("--others") "X"))
 612           (sort-regexp-fields nil ":[^\0]*\0\\([^\0]*\\)\0" "\\1"
 613                               (point-min) (point-max)))
 614
 615         (goto-char (point-min))
 616         (unless (or (eobp) (memq patchsym '(:work :index)))
 617           (forward-char 41))
 618         (while (looking-at ":\\([0-7]+\\) \\([0-7]+\\) [0-9A-Fa-f]\\{40\\} [0-9A-Fa-f]\\{40\\} ")
 619           (let ((old-perm (string-to-number (match-string 1) 8))
 620                 (new-perm (string-to-number (match-string 2) 8)))
 621             (goto-char (match-end 0))
 622             (let ((file
 623                    (cond ((looking-at
 624                            "\\([CR]\\)\\([0-9]*\\)\0\\([^\0]*\\)\0\\([^\0]*\\)\0")
 625                           (let* ((patch-status (stgit-patch-status patch))
 626                                  (file-subexp  (if (eq patch-status 'unapplied)
 627                                                    3
 628                                                  4))
 629                                  (file         (match-string file-subexp)))
 630                             (make-stgit-file
 631                              :old-perm       old-perm
 632                              :new-perm       new-perm
 633                              :copy-or-rename t
 634                              :cr-score       (string-to-number (match-string 2))
 635                              :cr-from        (match-string 3)
 636                              :cr-to          (match-string 4)
 637                              :status         (stgit-file-status-code
 638                                               (match-string 1))
 639                              :file           file)))
 640                          ((looking-at "\\([ABD-QS-Z]\\)\0\\([^\0]*\\)\0")
 641                           (make-stgit-file
 642                            :old-perm       old-perm
 643                            :new-perm       new-perm
 644                            :copy-or-rename nil
 645                            :cr-score       nil
 646                            :cr-from        nil
 647                            :cr-to          nil
 648                            :status         (stgit-file-status-code
 649                                             (match-string 1))
 650                            :file           (match-string 2))))))
 651               (goto-char (match-end 0))
 652               (ewoc-enter-last ewoc file))))
 653
 654         (unless (ewoc-nth ewoc 0)
 655           (ewoc-set-hf ewoc ""
 656                        (concat "    "
 657                                (propertize "<no files>"
 658                                            'face 'stgit-description-face)
 659                                "\n")))))
 660     (goto-char end)))
 661
 662 (defun stgit-find-file (&optional other-window)
 663   (let* ((file (or (stgit-patched-file-at-point)
 664                    (error "No file at point")))
 665          (filename (expand-file-name (stgit-file-file file))))
 666     (unless (file-exists-p filename)
 667       (error "File does not exist"))
 668     (funcall (if other-window 'find-file-other-window 'find-file)
 669              filename)
 670     (when (eq (stgit-file-status file) 'unmerged)
 671       (smerge-mode 1))))
 672
 673 (defun stgit-expand (&optional patches collapse)
 674   "Show the contents selected patches, or the patch at point.
 675
 676 See also `stgit-collapse'.
 677
 678 Non-interactively, operate on PATCHES, and collapse instead of
 679 expand if COLLAPSE is not nil."
 680   (interactive (list (stgit-patches-marked-or-at-point)))
 681   (let ((patches-diff (funcall (if collapse #'intersection #'set-difference)
 682                                patches stgit-expanded-patches)))
 683     (setq stgit-expanded-patches
 684           (if collapse
 685               (set-difference stgit-expanded-patches patches-diff)
 686             (append stgit-expanded-patches patches-diff)))
 687     (ewoc-map #'(lambda (patch)
 688                   (memq (stgit-patch-name patch) patches-diff))
 689               stgit-ewoc))
 690   (move-to-column (stgit-goal-column)))
 691
 692 (defun stgit-collapse (&optional patches)
 693   "Hide the contents selected patches, or the patch at point.
 694
 695 See also `stgit-expand'."
 696   (interactive (list (stgit-patches-marked-or-at-point)))
 697   (stgit-expand patches t))
 698
 699 (defun stgit-select-patch ()
 700   (let ((patchname (stgit-patch-name-at-point)))
 701     (stgit-expand (list patchname)
 702                   (memq patchname stgit-expanded-patches))))
 703
 704 (defun stgit-select ()
 705   "With point on a patch, toggle showing files in the patch.
 706
 707 With point on a file, open the associated file. Opens the target
 708 file for (applied) copies and renames."
 709   (interactive)
 710   (case (get-text-property (point) 'entry-type)
 711     ('patch
 712      (stgit-select-patch))
 713     ('file
 714      (stgit-find-file))
 715     (t
 716      (error "No patch or file on line"))))
 717
 718 (defun stgit-find-file-other-window ()
 719   "Open file at point in other window"
 720   (interactive)
 721   (stgit-find-file t))
 722
 723 (defun stgit-find-file-merge ()
 724   "Open file at point and merge it using `smerge-ediff'."
 725   (interactive)
 726   (stgit-find-file t)
 727   (smerge-ediff))
 728
 729 (defun stgit-quit ()
 730   "Hide the stgit buffer."
 731   (interactive)
 732   (bury-buffer))
 733
 734 (defun stgit-git-status ()
 735   "Show status using `git-status'."
 736   (interactive)
 737   (unless (fboundp 'git-status)
 738     (error "The stgit-git-status command requires git-status"))
 739   (let ((dir default-directory))
 740     (save-selected-window
 741       (pop-to-buffer nil)
 742       (git-status dir))))
 743
 744 (defun stgit-goal-column ()
 745   "Return goal column for the current line"
 746   (case (get-text-property (point) 'entry-type)
 747     ('patch 2)
 748     ('file 4)
 749     (t 0)))
 750
 751 (defun stgit-next-line (&optional arg)
 752   "Move cursor vertically down ARG lines"
 753   (interactive "p")
 754   (next-line arg)
 755   (move-to-column (stgit-goal-column)))
 756
 757 (defun stgit-previous-line (&optional arg)
 758   "Move cursor vertically up ARG lines"
 759   (interactive "p")
 760   (previous-line arg)
 761   (move-to-column (stgit-goal-column)))
 762
 763 (defun stgit-next-patch (&optional arg)
 764   "Move cursor down ARG patches."
 765   (interactive "p")
 766   (ewoc-goto-next stgit-ewoc (or arg 1))
 767   (move-to-column goal-column))
 768
 769 (defun stgit-previous-patch (&optional arg)
 770   "Move cursor up ARG patches."
 771   (interactive "p")
 772   (ewoc-goto-prev stgit-ewoc (or arg 1))
 773   (move-to-column goal-column))
 774
 775 (defvar stgit-mode-hook nil
 776   "Run after `stgit-mode' is setup.")
 777
 778 (defvar stgit-mode-map nil
 779   "Keymap for StGit major mode.")
 780
 781 (unless stgit-mode-map
 782   (let ((diff-map   (make-keymap))
 783         (toggle-map (make-keymap)))
 784     (suppress-keymap diff-map)
 785     (mapc (lambda (arg) (define-key diff-map (car arg) (cdr arg)))
 786           '(("b" .        stgit-diff-base)
 787             ("c" .        stgit-diff-combined)
 788             ("m" .        stgit-find-file-merge)
 789             ("o" .        stgit-diff-ours)
 790             ("t" .        stgit-diff-theirs)))
 791     (suppress-keymap toggle-map)
 792     (mapc (lambda (arg) (define-key toggle-map (car arg) (cdr arg)))
 793           '(("t" .        stgit-toggle-worktree)
 794             ("i" .        stgit-toggle-ignored)
 795             ("u" .        stgit-toggle-unknown)))
 796     (setq stgit-mode-map (make-keymap))
 797     (suppress-keymap stgit-mode-map)
 798     (mapc (lambda (arg) (define-key stgit-mode-map (car arg) (cdr arg)))
 799           `((" " .        stgit-mark)
 800             ("m" .        stgit-mark)
 801             ("\d" .       stgit-unmark-up)
 802             ("u" .        stgit-unmark-down)
 803             ("?" .        stgit-help)
 804             ("h" .        stgit-help)
 805             ("\C-p" .     stgit-previous-line)
 806             ("\C-n" .     stgit-next-line)
 807             ([up] .       stgit-previous-line)
 808             ([down] .     stgit-next-line)
 809             ("p" .        stgit-previous-patch)
 810             ("n" .        stgit-next-patch)
 811             ("\M-{" .     stgit-previous-patch)
 812             ("\M-}" .     stgit-next-patch)
 813             ("s" .        stgit-git-status)
 814             ("g" .        stgit-reload-or-repair)
 815             ("r" .        stgit-refresh)
 816             ("\C-c\C-r" . stgit-rename)
 817             ("e" .        stgit-edit)
 818             ("M" .        stgit-move-patches)
 819             ("S" .        stgit-squash)
 820             ("N" .        stgit-new)
 821             ("c" .        stgit-new-and-refresh)
 822             ("\C-c\C-c" . stgit-commit)
 823             ("\C-c\C-u" . stgit-uncommit)
 824             ("U" .        stgit-revert)
 825             ("R" .        stgit-resolve-file)
 826             ("\r" .       stgit-select)
 827             ("+" .        stgit-expand)
 828             ("-" .        stgit-collapse)
 829             ("o" .        stgit-find-file-other-window)
 830             ("i" .        stgit-toggle-index)
 831             (">" .        stgit-push-next)
 832             ("<" .        stgit-pop-next)
 833             ("P" .        stgit-push-or-pop)
 834             ("G" .        stgit-goto)
 835             ("=" .        stgit-diff)
 836             ("D" .        stgit-delete)
 837             ([?\C-/] .    stgit-undo)
 838             ("\C-_" .     stgit-undo)
 839             ([?\C-c ?\C-/] . stgit-redo)
 840             ("\C-c\C-_" . stgit-redo)
 841             ("B" .        stgit-branch)
 842             ("\C-c\C-b" . stgit-rebase)
 843             ("t" .        ,toggle-map)
 844             ("d" .        ,diff-map)
 845             ("q" .        stgit-quit)))))
 846
 847 (defun stgit-mode ()
 848   "Major mode for interacting with StGit.
 849
 850 Start StGit using \\[stgit].
 851
 852 Basic commands:
 853 \\<stgit-mode-map>\
 854 \\[stgit-help]  Show this help text
 855 \\[stgit-quit]  Hide the StGit buffer
 856 \\[describe-bindings]   Show all key bindings
 857
 858 \\[stgit-reload-or-repair]      Reload the StGit buffer
 859 \\[universal-argument] \\[stgit-reload-or-repair]       Repair StGit metadata
 860
 861 \\[stgit-undo]  Undo most recent StGit operation
 862 \\[stgit-redo]  Undo recent undo
 863
 864 \\[stgit-git-status]    Run `git-status' (if available)
 865
 866 Movement commands:
 867 \\[stgit-previous-line] Move to previous line
 868 \\[stgit-next-line]     Move to next line
 869 \\[stgit-previous-patch]        Move to previous patch
 870 \\[stgit-next-patch]    Move to next patch
 871
 872 \\[stgit-mark]  Mark patch
 873 \\[stgit-unmark-up]     Unmark patch and move up
 874 \\[stgit-unmark-down]   Unmark patch and move down
 875
 876 Commands for patches:
 877 \\[stgit-select]        Toggle showing changed files in patch
 878 \\[stgit-refresh]       Refresh patch with changes in index or work tree
 879 \\[stgit-diff]  Show the patch log and diff
 880
 881 \\[stgit-expand]        Show changes in selected patches
 882 \\[stgit-collapse]      Hide changes in selected patches
 883
 884 \\[stgit-new]   Create a new, empty patch
 885 \\[stgit-new-and-refresh]       Create a new patch from index or work tree
 886 \\[stgit-rename]        Rename patch
 887 \\[stgit-edit]  Edit patch description
 888 \\[stgit-delete]        Delete patch(es)
 889
 890 \\[stgit-revert]        Revert all changes in index or work tree
 891 \\[stgit-toggle-index]  Toggle all changes between index and work tree
 892
 893 \\[stgit-push-next]     Push next patch onto stack
 894 \\[stgit-pop-next]      Pop current patch from stack
 895 \\[stgit-push-or-pop]   Push or pop patch at point
 896 \\[stgit-goto]  Make current patch current by popping or pushing
 897
 898 \\[stgit-squash]        Squash (meld together) patches
 899 \\[stgit-move-patches]  Move patch(es) to point
 900
 901 \\[stgit-commit]        Commit patch(es)
 902 \\[stgit-uncommit]      Uncommit patch(es)
 903
 904 Commands for files:
 905 \\[stgit-select]        Open the file in this window
 906 \\[stgit-find-file-other-window]        Open the file in another window
 907 \\[stgit-diff]  Show the file's diff
 908
 909 \\[stgit-toggle-index]  Toggle change between index and work tree
 910 \\[stgit-revert]        Revert changes to file
 911
 912 Display commands:
 913 \\[stgit-toggle-worktree]       Toggle showing index and work tree
 914 \\[stgit-toggle-unknown]        Toggle showing unknown files
 915 \\[stgit-toggle-ignored]        Toggle showing ignored files
 916
 917 Commands for diffs:
 918 \\[stgit-diff]  Show diff of patch or file
 919 \\[stgit-diff-base]     Show diff against the merge base
 920 \\[stgit-diff-ours]     Show diff against our branch
 921 \\[stgit-diff-theirs]   Show diff against their branch
 922
 923   With one prefix argument (e.g., \\[universal-argument] \\[stgit-diff]), \
 924 ignore space changes.
 925   With two prefix arguments (e.g., \\[universal-argument] \
 926 \\[universal-argument] \\[stgit-diff]), ignore all space changes.
 927
 928 Commands for merge conflicts:
 929 \\[stgit-find-file-merge]       Resolve conflicts using `smerge-ediff'
 930 \\[stgit-resolve-file]  Mark unmerged file as resolved
 931
 932 Commands for branches:
 933 \\[stgit-branch]        Switch to another branch
 934 \\[stgit-rebase]        Rebase the current branch
 935
 936 Customization variables:
 937 `stgit-abbreviate-copies-and-renames'
 938 `stgit-default-show-worktree'
 939 `stgit-find-copies-harder'
 940 `stgit-show-worktree-mode'
 941
 942 See also \\[customize-group] for the \"stgit\" group."
 943   (kill-all-local-variables)
 944   (buffer-disable-undo)
 945   (setq mode-name "StGit"
 946         major-mode 'stgit-mode
 947         goal-column 2)
 948   (use-local-map stgit-mode-map)
 949   (set (make-local-variable 'list-buffers-directory) default-directory)
 950   (set (make-local-variable 'stgit-marked-patches) nil)
 951   (set (make-local-variable 'stgit-expanded-patches) (list :work :index))
 952   (set (make-local-variable 'stgit-show-worktree) stgit-default-show-worktree)
 953   (set (make-local-variable 'stgit-index-node) nil)
 954   (set (make-local-variable 'stgit-worktree-node) nil)
 955   (set (make-local-variable 'parse-sexp-lookup-properties) t)
 956   (set-variable 'truncate-lines 't)
 957   (add-hook 'after-save-hook 'stgit-update-saved-file)
 958   (run-hooks 'stgit-mode-hook))
 959
 960 (defun stgit-update-saved-file ()
 961   (let* ((file (expand-file-name buffer-file-name))
 962          (dir (file-name-directory file))
 963          (gitdir (condition-case nil (git-get-top-dir dir)
 964                    (error nil)))
 965          (buffer (and gitdir (stgit-find-buffer gitdir))))
 966     (when buffer
 967       (with-current-buffer buffer
 968         (stgit-refresh-worktree)))))
 969
 970 (defun stgit-add-mark (patchsym)
 971   "Mark the patch PATCHSYM."
 972   (setq stgit-marked-patches (cons patchsym stgit-marked-patches)))
 973
 974 (defun stgit-remove-mark (patchsym)
 975   "Unmark the patch PATCHSYM."
 976   (setq stgit-marked-patches (delq patchsym stgit-marked-patches)))
 977
 978 (defun stgit-clear-marks ()
 979   "Unmark all patches."
 980   (setq stgit-marked-patches '()))
 981
 982 (defun stgit-patch-at-point (&optional cause-error)
 983   (get-text-property (point) 'patch-data))
 984
 985 (defun stgit-patch-name-at-point (&optional cause-error only-patches)
 986   "Return the patch name on the current line as a symbol.
 987 If CAUSE-ERROR is not nil, signal an error if none found.
 988 If ONLY-PATCHES is not nil, only allow real patches, and not
 989 index or work tree."
 990   (let ((patch (stgit-patch-at-point)))
 991     (and patch
 992          only-patches
 993          (memq (stgit-patch-status patch) '(work index))
 994          (setq patch nil))
 995     (cond (patch
 996            (stgit-patch-name patch))
 997           (cause-error
 998            (error "No patch on this line")))))
 999
1000 (defun stgit-patched-file-at-point ()
1001   (get-text-property (point) 'file-data))
1002
1003 (defun stgit-patches-marked-or-at-point ()
1004   "Return the symbols of the marked patches, or the patch on the current line."
1005   (if stgit-marked-patches
1006       stgit-marked-patches
1007     (let ((patch (stgit-patch-name-at-point)))
1008       (if patch
1009           (list patch)
1010         '()))))
1011
1012 (defun stgit-goto-patch (patchsym &optional file)
1013   "Move point to the line containing patch PATCHSYM.
1014 If that patch cannot be found, do nothing.
1015
1016 If the patch was found and FILE is not nil, instead move to that
1017 file's line. If FILE cannot be found, stay on the line of
1018 PATCHSYM."
1019   (let ((node (ewoc-nth stgit-ewoc 0)))
1020     (while (and node (not (eq (stgit-patch-name (ewoc-data node))
1021                               patchsym)))
1022       (setq node (ewoc-next stgit-ewoc node)))
1023     (when (and node file)
1024       (let* ((file-ewoc (stgit-patch-files-ewoc (ewoc-data node)))
1025              (file-node (ewoc-nth file-ewoc 0)))
1026         (while (and file-node (not (equal (stgit-file-file (ewoc-data file-node)) file)))
1027           (setq file-node (ewoc-next file-ewoc file-node)))
1028         (when file-node
1029           (ewoc-goto-node file-ewoc file-node)
1030           (move-to-column (stgit-goal-column))
1031           (setq node nil))))
1032     (when node
1033       (ewoc-goto-node stgit-ewoc node)
1034       (move-to-column goal-column))))
1035
1036 (defun stgit-init ()
1037   "Run stg init."
1038   (interactive)
1039   (stgit-capture-output nil
1040     (stgit-run "init"))
1041   (stgit-reload))
1042
1043 (defun stgit-mark ()
1044   "Mark the patch under point."
1045   (interactive)
1046   (let* ((node (ewoc-locate stgit-ewoc))
1047          (patch (ewoc-data node))
1048          (name (stgit-patch-name patch)))
1049     (when (eq name :work)
1050       (error "Cannot mark the work tree"))
1051     (when (eq name :index)
1052       (error "Cannot mark the index"))
1053     (stgit-add-mark (stgit-patch-name patch))
1054     (ewoc-invalidate stgit-ewoc node))
1055   (stgit-next-patch))
1056
1057 (defun stgit-unmark-up ()
1058   "Remove mark from the patch on the previous line."
1059   (interactive)
1060   (stgit-previous-patch)
1061   (let* ((node (ewoc-locate stgit-ewoc))
1062          (patch (ewoc-data node)))
1063     (stgit-remove-mark (stgit-patch-name patch))
1064     (ewoc-invalidate stgit-ewoc node))
1065   (move-to-column (stgit-goal-column)))
1066
1067 (defun stgit-unmark-down ()
1068   "Remove mark from the patch on the current line."
1069   (interactive)
1070   (let* ((node (ewoc-locate stgit-ewoc))
1071          (patch (ewoc-data node)))
1072     (stgit-remove-mark (stgit-patch-name patch))
1073     (ewoc-invalidate stgit-ewoc node))
1074   (stgit-next-patch))
1075
1076 (defun stgit-rename (name)
1077   "Rename the patch under point to NAME."
1078   (interactive (list
1079                 (read-string "Patch name: "
1080                              (symbol-name (stgit-patch-name-at-point t t)))))
1081   (let ((old-patchsym (stgit-patch-name-at-point t t)))
1082     (stgit-capture-output nil
1083       (stgit-run "rename" old-patchsym name))
1084     (let ((name-sym (intern name)))
1085       (when (memq old-patchsym stgit-expanded-patches)
1086         (setq stgit-expanded-patches
1087               (cons name-sym (delq old-patchsym stgit-expanded-patches))))
1088       (when (memq old-patchsym stgit-marked-patches)
1089         (setq stgit-marked-patches
1090               (cons name-sym (delq old-patchsym stgit-marked-patches))))
1091       (stgit-reload)
1092       (stgit-goto-patch name-sym))))
1093
1094 (defun stgit-reload-or-repair (repair)
1095   "Update the contents of the StGit buffer (`stgit-reload').
1096
1097 With a prefix argument, repair the StGit metadata if the branch
1098 was modified with git commands (`stgit-repair')."
1099   (interactive "P")
1100   (if repair
1101       (stgit-repair)
1102     (stgit-reload)))
1103
1104 (defun stgit-repair ()
1105   "Run stg repair."
1106   (interactive)
1107   (stgit-capture-output nil
1108     (stgit-run "repair"))
1109   (stgit-reload))
1110
1111 (defun stgit-available-branches ()
1112   "Returns a list of the available stg branches"
1113   (let ((output (with-output-to-string
1114                   (stgit-run "branch" "--list")))
1115         (start 0)
1116         result)
1117     (while (string-match "^>?\\s-+s\\s-+\\(\\S-+\\)" output start)
1118       (setq result (cons (match-string 1 output) result))
1119       (setq start (match-end 0)))
1120     result))
1121
1122 (defun stgit-branch (branch)
1123   "Switch to branch BRANCH."
1124   (interactive (list (completing-read "Switch to branch: "
1125                                       (stgit-available-branches))))
1126   (stgit-capture-output nil (stgit-run "branch" "--" branch))
1127   (stgit-reload))
1128
1129 (defun stgit-available-refs (&optional omit-stgit)
1130   "Returns a list of the available git refs.
1131 If OMIT-STGIT is not nil, filter out \"resf/heads/*.stgit\"."
1132   (let* ((output (with-output-to-string
1133                    (stgit-run-git-silent "for-each-ref" "--format=%(refname)"
1134                                          "refs/tags" "refs/heads"
1135                                          "refs/remotes")))
1136          (result (split-string output "\n" t)))
1137     (mapcar (lambda (s)
1138               (if (string-match "^refs/\\(heads\\|tags\\|remotes\\)/" s)
1139                   (substring s (match-end 0))
1140                 s))
1141             (if omit-stgit
1142                 (delete-if (lambda (s)
1143                              (string-match "^refs/heads/.*\\.stgit$" s))
1144                            result)
1145               result))))
1146
1147 (defun stgit-rebase (new-base)
1148   "Rebase to NEW-BASE."
1149   (interactive (list (completing-read "Rebase to: "
1150                                       (stgit-available-refs t))))
1151   (stgit-capture-output nil (stgit-run "rebase" new-base))
1152   (stgit-reload))
1153
1154 (defun stgit-commit (count)
1155   "Run stg commit on COUNT commits.
1156 Interactively, the prefix argument is used as COUNT.
1157 A negative COUNT will uncommit instead."
1158   (interactive "p")
1159   (if (< count 0)
1160       (stgit-uncommit (- count))
1161     (stgit-capture-output nil (stgit-run "commit" "-n" count))
1162     (stgit-reload)))
1163
1164 (defun stgit-uncommit (count)
1165   "Run stg uncommit on COUNT commits.
1166 Interactively, the prefix argument is used as COUNT.
1167 A negative COUNT will commit instead."
1168   (interactive "p")
1169   (if (< count 0)
1170       (stgit-commit (- count))
1171     (stgit-capture-output nil (stgit-run "uncommit" "-n" count))
1172     (stgit-reload)))
1173
1174 (defun stgit-neighbour-file ()
1175   "Return the file name of the next file after point, or the
1176 previous file if point is at the last file within a patch."
1177   (let ((old-point (point))
1178         neighbour-file)
1179     (and (zerop (forward-line 1))
1180          (let ((f (stgit-patched-file-at-point)))
1181            (and f (setq neighbour-file (stgit-file-file f)))))
1182     (goto-char old-point)
1183     (unless neighbour-file
1184       (and (zerop (forward-line -1))
1185            (let ((f (stgit-patched-file-at-point)))
1186              (and f (setq neighbour-file (stgit-file-file f)))))
1187       (goto-char old-point))
1188     neighbour-file))
1189
1190 (defun stgit-revert-file ()
1191   "Revert the file at point, which must be in the index or the
1192 working tree."
1193   (interactive)
1194   (let* ((patched-file (or (stgit-patched-file-at-point)
1195                            (error "No file on the current line")))
1196          (patch-name   (stgit-patch-name-at-point))
1197          (file-status  (stgit-file-status patched-file))
1198          (rm-file      (cond ((stgit-file-copy-or-rename patched-file)
1199                               (stgit-file-cr-to patched-file))
1200                              ((eq file-status 'add)
1201                               (stgit-file-file patched-file))))
1202          (co-file      (cond ((eq file-status 'rename)
1203                               (stgit-file-cr-from patched-file))
1204                              ((not (memq file-status '(copy add)))
1205                               (stgit-file-file patched-file))))
1206          (next-file    (stgit-neighbour-file)))
1207
1208     (unless (memq patch-name '(:work :index))
1209       (error "No index or working tree file on this line"))
1210
1211     (when (eq file-status 'ignore)
1212       (error "Cannot revert ignored files"))
1213
1214     (when (eq file-status 'unknown)
1215       (error "Cannot revert unknown files"))
1216
1217     (let ((nfiles (+ (if rm-file 1 0) (if co-file 1 0))))
1218       (when (yes-or-no-p (format "Revert %d file%s? "
1219                                  nfiles
1220                                  (if (= nfiles 1) "" "s")))
1221         (stgit-capture-output nil
1222           (when rm-file
1223             (stgit-run-git "rm" "-f" "-q" "--" rm-file))
1224           (when co-file
1225             (stgit-run-git "checkout" "HEAD" co-file)))
1226         (stgit-reload)
1227         (stgit-goto-patch patch-name next-file)))))
1228
1229 (defun stgit-revert ()
1230   "Revert the change at point, which must be the index, the work
1231 tree, or a single change in either."
1232   (interactive)
1233   (let ((patched-file (stgit-patched-file-at-point)))
1234     (if patched-file
1235         (stgit-revert-file)
1236       (let* ((patch-name (or (stgit-patch-name-at-point)
1237                              (error "No patch or file at point")))
1238              (patch-desc (case patch-name
1239                            (:index "index")
1240                            (:work  "work tree")
1241                            (t (error (substitute-command-keys
1242                                       "Use \\[stgit-delete] to delete a patch"))))))
1243         (when (if (eq patch-name :work)
1244                   (stgit-work-tree-empty-p)
1245                 (stgit-index-empty-p))
1246           (error (format "There are no changes in the %s to revert"
1247                          patch-desc)))
1248         (and (eq patch-name :index)
1249              (not (stgit-work-tree-empty-p))
1250              (error "Cannot revert index as work tree contains unstaged changes"))
1251
1252         (when (yes-or-no-p (format "Revert all changes in the %s? "
1253                                    patch-desc))
1254           (if (eq patch-name :index)
1255               (stgit-run-git-silent "reset" "--hard" "-q")
1256             (stgit-run-git-silent "checkout" "--" "."))
1257           (stgit-refresh-index)
1258           (stgit-refresh-worktree)
1259           (stgit-goto-patch patch-name))))))
1260
1261 (defun stgit-resolve-file ()
1262   "Resolve conflict in the file at point."
1263   (interactive)
1264   (let* ((patched-file (stgit-patched-file-at-point))
1265          (patch        (stgit-patch-at-point))
1266          (patch-name   (and patch (stgit-patch-name patch)))
1267          (status       (and patched-file (stgit-file-status patched-file))))
1268
1269     (unless (memq patch-name '(:work :index))
1270       (error "No index or working tree file on this line"))
1271
1272     (unless (eq status 'unmerged)
1273       (error "No conflict to resolve at the current line"))
1274
1275     (stgit-capture-output nil
1276       (stgit-move-change-to-index (stgit-file-file patched-file)))
1277
1278     (stgit-reload)))
1279
1280 (defun stgit-push-next (npatches)
1281   "Push the first unapplied patch.
1282 With numeric prefix argument, push that many patches."
1283   (interactive "p")
1284   (stgit-capture-output nil (stgit-run "push" "-n" npatches))
1285   (stgit-reload)
1286   (stgit-refresh-git-status))
1287
1288 (defun stgit-pop-next (npatches)
1289   "Pop the topmost applied patch.
1290 With numeric prefix argument, pop that many patches."
1291   (interactive "p")
1292   (stgit-capture-output nil (stgit-run "pop" "-n" npatches))
1293   (stgit-reload)
1294   (stgit-refresh-git-status))
1295
1296 (defun stgit-applied-at-point-p ()
1297   "Return non-nil if the patch at point is applied."
1298   (let ((patch (stgit-patch-at-point t)))
1299     (not (eq (stgit-patch-status patch) 'unapplied))))
1300
1301 (defun stgit-push-or-pop ()
1302   "Push or pop the patch on the current line."
1303   (interactive)
1304   (let ((patchsym (stgit-patch-name-at-point t t))
1305         (applied (stgit-applied-at-point-p)))
1306     (stgit-capture-output nil
1307       (stgit-run (if applied "pop" "push") patchsym))
1308     (stgit-reload)))
1309
1310 (defun stgit-goto ()
1311   "Go to the patch on the current line."
1312   (interactive)
1313   (let ((patchsym (stgit-patch-name-at-point t)))
1314     (stgit-capture-output nil
1315       (stgit-run "goto" patchsym))
1316     (stgit-reload)))
1317
1318 (defun stgit-id (patchsym)
1319   "Return the git commit id for PATCHSYM.
1320 If PATCHSYM is a keyword, returns PATCHSYM unmodified."
1321   (if (keywordp patchsym)
1322       patchsym
1323     (let ((result (with-output-to-string
1324                     (stgit-run-silent "id" patchsym))))
1325       (unless (string-match "^\\([0-9A-Fa-f]\\{40\\}\\)$" result)
1326         (error "Cannot find commit id for %s" patchsym))
1327       (match-string 1 result))))
1328
1329 (defun stgit-show-patch (unmerged-stage ignore-whitespace)
1330   "Show the patch on the current line.
1331
1332 UNMERGED-STAGE is the argument to `git-diff' that that selects
1333 which stage to diff against in the case of unmerged files."
1334   (let ((space-arg (when (numberp ignore-whitespace)
1335                      (cond ((> ignore-whitespace 4)
1336                             "--ignore-all-space")
1337                            ((> ignore-whitespace 1)
1338                             "--ignore-space-change"))))
1339         (patch-name (stgit-patch-name-at-point t)))
1340     (stgit-capture-output "*StGit patch*"
1341       (case (get-text-property (point) 'entry-type)
1342         ('file
1343          (let* ((patched-file (stgit-patched-file-at-point))
1344                 (patch-id (let ((id (stgit-id patch-name)))
1345                             (if (and (eq id :index)
1346                                      (eq (stgit-file-status patched-file)
1347                                          'unmerged))
1348                                 :work
1349                               id)))
1350                 (args (append (and space-arg (list space-arg))
1351                               (and (stgit-file-cr-from patched-file)
1352                                    (list (stgit-find-copies-harder-diff-arg)))
1353                               (cond ((eq patch-id :index)
1354                                      '("--cached"))
1355                                     ((eq patch-id :work)
1356                                      (list unmerged-stage))
1357                                     (t
1358                                      (list (concat patch-id "^") patch-id)))
1359                               '("--")
1360                               (if (stgit-file-copy-or-rename patched-file)
1361                                   (list (stgit-file-cr-from patched-file)
1362                                         (stgit-file-cr-to patched-file))
1363                                 (list (stgit-file-file patched-file))))))
1364            (apply 'stgit-run-git "diff" args)))
1365         ('patch
1366          (let* ((patch-id (stgit-id patch-name)))
1367            (if (or (eq patch-id :index) (eq patch-id :work))
1368                (apply 'stgit-run-git "diff"
1369                       (stgit-find-copies-harder-diff-arg)
1370                       (append (and space-arg (list space-arg))
1371                               (if (eq patch-id :index)
1372                                   '("--cached")
1373                                 (list unmerged-stage))))
1374              (let ((args (append '("show" "-O" "--patch-with-stat" "-O" "-M")
1375                                  (and space-arg (list "-O" space-arg))
1376                                  (list (stgit-patch-name-at-point)))))
1377                (apply 'stgit-run args)))))
1378         (t
1379          (error "No patch or file at point")))
1380       (with-current-buffer standard-output
1381         (goto-char (point-min))
1382         (diff-mode)))))
1383
1384 (defmacro stgit-define-diff (name diff-arg &optional unmerged-action)
1385   `(defun ,name (&optional ignore-whitespace)
1386      ,(format "Show the patch on the current line.
1387
1388 %sWith a prefix argument, ignore whitespace. With a prefix argument
1389 greater than four (e.g., \\[universal-argument] \
1390 \\[universal-argument] \\[%s]), ignore all whitespace."
1391               (if unmerged-action
1392                   (format "For unmerged files, %s.\n\n" unmerged-action)
1393                 "")
1394               name)
1395      (interactive "p")
1396      (stgit-show-patch ,diff-arg ignore-whitespace)))
1397
1398 (stgit-define-diff stgit-diff
1399                    "--ours" nil)
1400 (stgit-define-diff stgit-diff-ours
1401                    "--ours"
1402                    "diff against our branch")
1403 (stgit-define-diff stgit-diff-theirs
1404                    "--theirs"
1405                    "diff against their branch")
1406 (stgit-define-diff stgit-diff-base
1407                    "--base"
1408                    "diff against the merge base")
1409 (stgit-define-diff stgit-diff-combined
1410                    "--cc"
1411                    "show a combined diff")
1412
1413 (defun stgit-move-change-to-index (file &optional force)
1414   "Copies the work tree state of FILE to index, using git add or git rm.
1415
1416 If FORCE is not nil, use --force."
1417   (let ((op (if (or (file-exists-p file) (file-symlink-p file))
1418                 '("add") '("rm" "-q"))))
1419     (stgit-capture-output "*git output*"
1420       (apply 'stgit-run-git (append op (and force '("--force"))
1421                                     '("--") (list file))))))
1422
1423 (defun stgit-remove-change-from-index (file)
1424   "Unstages the change in FILE from the index"
1425   (stgit-capture-output "*git output*"
1426     (stgit-run-git "reset" "-q" "--" file)))
1427
1428 (defun stgit-git-index-unmerged-p ()
1429   (let (result)
1430     (with-output-to-string
1431       (setq result (not (zerop (stgit-run-git-silent "diff-index" "--cached"
1432                                                      "--diff-filter=U"
1433                                                      "--quiet" "HEAD")))))
1434     result))
1435
1436 (defun stgit-file-toggle-index ()
1437   "Move modified file in or out of the index.
1438
1439 Leaves the point where it is, but moves the mark to where the
1440 file ended up. You can then jump to the file with \
1441 \\[exchange-point-and-mark]."
1442   (interactive)
1443   (let* ((patched-file   (or (stgit-patched-file-at-point)
1444                              (error "No file on the current line")))
1445          (patched-status (stgit-file-status patched-file)))
1446     (when (eq patched-status 'unmerged)
1447       (error (substitute-command-keys "Use \\[stgit-resolve-file] to move an unmerged file to the index")))
1448     (let* ((patch      (stgit-patch-at-point))
1449            (patch-name (stgit-patch-name patch))
1450            (mark-file  (if (eq patched-status 'rename)
1451                            (stgit-file-cr-to patched-file)
1452                          (stgit-file-file patched-file)))
1453            (point-file  (if (eq patched-status 'rename)
1454                             (stgit-file-cr-from patched-file)
1455                           (stgit-neighbour-file))))
1456
1457       (cond ((eq patch-name :work)
1458              (stgit-move-change-to-index (stgit-file-file patched-file)
1459                                          (eq patched-status 'ignore)))
1460             ((eq patch-name :index)
1461              (stgit-remove-change-from-index (stgit-file-file patched-file)))
1462             (t
1463              (error "Can only move files between working tree and index")))
1464       (stgit-refresh-worktree)
1465       (stgit-refresh-index)
1466       (stgit-goto-patch (if (eq patch-name :index) :work :index) mark-file)
1467       (push-mark nil t t)
1468       (stgit-goto-patch patch-name point-file))))
1469
1470 (defun stgit-toggle-index ()
1471   "Move change in or out of the index.
1472
1473 Works on index and work tree, as well as files in either.
1474
1475 Leaves the point where it is, but moves the mark to where the
1476 file ended up. You can then jump to the file with \
1477 \\[exchange-point-and-mark]."
1478   (interactive)
1479   (if (stgit-patched-file-at-point)
1480       (stgit-file-toggle-index)
1481     (let ((patch-name (stgit-patch-name-at-point)))
1482       (unless (memq patch-name '(:index :work))
1483         (error "Can only move changes between working tree and index"))
1484       (when (stgit-git-index-unmerged-p)
1485         (error "Resolve unmerged changes with \\[stgit-resolve-file] first"))
1486       (if (if (eq patch-name :index)
1487               (stgit-index-empty-p)
1488             (stgit-work-tree-empty-p))
1489           (message "No changes to be moved")
1490         (stgit-capture-output nil
1491           (if (eq patch-name :work)
1492               (stgit-run-git "add" "--update")
1493             (stgit-run-git "reset" "--mixed" "-q")))
1494         (stgit-refresh-worktree)
1495         (stgit-refresh-index))
1496       (stgit-goto-patch (if (eq patch-name :index) :work :index)))))
1497
1498 (defun stgit-edit ()
1499   "Edit the patch on the current line."
1500   (interactive)
1501   (let ((patchsym (stgit-patch-name-at-point t t))
1502         (edit-buf (get-buffer-create "*StGit edit*"))
1503         (dir default-directory))
1504     (log-edit 'stgit-confirm-edit t nil edit-buf)
1505     (set (make-local-variable 'stgit-edit-patchsym) patchsym)
1506     (setq default-directory dir)
1507     (let ((standard-output edit-buf))
1508       (stgit-run-silent "edit" "--save-template=-" patchsym))))
1509
1510 (defun stgit-confirm-edit ()
1511   (interactive)
1512   (let ((file (make-temp-file "stgit-edit-")))
1513     (write-region (point-min) (point-max) file)
1514     (stgit-capture-output nil
1515       (stgit-run "edit" "-f" file stgit-edit-patchsym))
1516     (with-current-buffer log-edit-parent-buffer
1517       (stgit-reload))))
1518
1519 (defun stgit-new (add-sign &optional refresh)
1520   "Create a new patch.
1521 With a prefix argument, include a \"Signed-off-by:\" line at the
1522 end of the patch."
1523   (interactive "P")
1524   (let ((edit-buf (get-buffer-create "*StGit edit*"))
1525         (dir default-directory))
1526     (log-edit 'stgit-confirm-new t nil edit-buf)
1527     (setq default-directory dir)
1528     (set (make-local-variable 'stgit-refresh-after-new) refresh)
1529     (when add-sign
1530       (save-excursion
1531         (let ((standard-output (current-buffer)))
1532           (stgit-run-silent "new" "--sign" "--save-template=-"))))))
1533
1534 (defun stgit-confirm-new ()
1535   (interactive)
1536   (let ((file (make-temp-file "stgit-edit-"))
1537         (refresh stgit-refresh-after-new))
1538     (write-region (point-min) (point-max) file)
1539     (stgit-capture-output nil
1540       (stgit-run "new" "-f" file))
1541     (with-current-buffer log-edit-parent-buffer
1542       (if refresh
1543           (stgit-refresh)
1544         (stgit-reload)))))
1545
1546 (defun stgit-new-and-refresh (add-sign)
1547   "Create a new patch and refresh it with the current changes.
1548
1549 With a prefix argument, include a \"Signed-off-by:\" line at the
1550 end of the patch.
1551
1552 This works just like running `stgit-new' followed by `stgit-refresh'."
1553   (interactive "P")
1554   (stgit-new add-sign t))
1555
1556 (defun stgit-create-patch-name (description)
1557   "Create a patch name from a long description"
1558   (let ((patch ""))
1559     (while (> (length description) 0)
1560       (cond ((string-match "\\`[a-zA-Z_-]+" description)
1561              (setq patch (downcase (concat patch
1562                                            (match-string 0 description))))
1563              (setq description (substring description (match-end 0))))
1564             ((string-match "\\` +" description)
1565              (setq patch (concat patch "-"))
1566              (setq description (substring description (match-end 0))))
1567             ((string-match "\\`[^a-zA-Z_-]+" description)
1568              (setq description (substring description (match-end 0))))))
1569     (cond ((= (length patch) 0)
1570            "patch")
1571           ((> (length patch) 20)
1572            (substring patch 0 20))
1573           (t patch))))
1574
1575 (defun stgit-delete (patchsyms &optional spill-p)
1576   "Delete the patches in PATCHSYMS.
1577 Interactively, delete the marked patches, or the patch at point.
1578
1579 With a prefix argument, or SPILL-P, spill the patch contents to
1580 the work tree and index."
1581   (interactive (list (stgit-patches-marked-or-at-point)
1582                      current-prefix-arg))
1583   (unless patchsyms
1584     (error "No patches to delete"))
1585   (when (memq :index patchsyms)
1586     (error "Cannot delete the index"))
1587   (when (memq :work  patchsyms)
1588     (error "Cannot delete the work tree"))
1589
1590   (let ((npatches (length patchsyms)))
1591     (when (yes-or-no-p (format "Really delete %d patch%s%s? "
1592                                npatches
1593                                (if (= 1 npatches) "" "es")
1594                                (if spill-p
1595                                    " (spilling contents to index)"
1596                                  "")))
1597       (let ((args (if spill-p
1598                       (cons "--spill" patchsyms)
1599                     patchsyms)))
1600         (stgit-capture-output nil
1601           (apply 'stgit-run "delete" args))
1602         (stgit-reload)))))
1603
1604 (defun stgit-move-patches-target ()
1605   "Return the patchsym indicating a target patch for
1606 `stgit-move-patches'.
1607
1608 This is either the patch at point, or one of :top and :bottom, if
1609 the point is after or before the applied patches."
1610
1611   (let ((patchsym (stgit-patch-name-at-point nil t)))
1612     (cond (patchsym patchsym)
1613           ((save-excursion (re-search-backward "^>" nil t)) :top)
1614           (t :bottom))))
1615
1616 (defun stgit-sort-patches (patchsyms)
1617   "Returns the list of patches in PATCHSYMS sorted according to
1618 their position in the patch series, bottommost first.
1619
1620 PATCHSYMS must not contain duplicate entries."
1621   (let (sorted-patchsyms
1622         (series (with-output-to-string
1623                   (with-current-buffer standard-output
1624                     (stgit-run-silent "series" "--noprefix"))))
1625         start)
1626     (while (string-match "^\\(.+\\)" series start)
1627       (let ((patchsym (intern (match-string 1 series))))
1628         (when (memq patchsym patchsyms)
1629           (setq sorted-patchsyms (cons patchsym sorted-patchsyms))))
1630       (setq start (match-end 0)))
1631     (setq sorted-patchsyms (nreverse sorted-patchsyms))
1632
1633     (unless (= (length patchsyms) (length sorted-patchsyms))
1634       (error "Internal error"))
1635
1636     sorted-patchsyms))
1637
1638 (defun stgit-move-patches (patchsyms target-patch)
1639   "Move the patches in PATCHSYMS to below TARGET-PATCH.
1640 If TARGET-PATCH is :bottom or :top, move the patches to the
1641 bottom or top of the stack, respectively.
1642
1643 Interactively, move the marked patches to where the point is."
1644   (interactive (list stgit-marked-patches
1645                      (stgit-move-patches-target)))
1646   (unless patchsyms
1647     (error "Need at least one patch to move"))
1648
1649   (unless target-patch
1650     (error "Point not at a patch"))
1651
1652   (if (eq target-patch :top)
1653       (stgit-capture-output nil
1654         (apply 'stgit-run "float" patchsyms))
1655
1656     ;; need to have patchsyms sorted by position in the stack
1657     (let ((sorted-patchsyms (stgit-sort-patches patchsyms)))
1658       (while sorted-patchsyms
1659         (setq sorted-patchsyms
1660               (and (stgit-capture-output nil
1661                      (if (eq target-patch :bottom)
1662                          (stgit-run "sink" "--" (car sorted-patchsyms))
1663                        (stgit-run "sink" "--to" target-patch "--"
1664                                   (car sorted-patchsyms))))
1665                    (cdr sorted-patchsyms))))))
1666   (stgit-reload))
1667
1668 (defun stgit-squash (patchsyms)
1669   "Squash the patches in PATCHSYMS.
1670 Interactively, squash the marked patches.
1671
1672 Unless there are any conflicts, the patches will be merged into
1673 one patch, which will occupy the same spot in the series as the
1674 deepest patch had before the squash."
1675   (interactive (list stgit-marked-patches))
1676   (when (< (length patchsyms) 2)
1677     (error "Need at least two patches to squash"))
1678   (let ((stgit-buffer (current-buffer))
1679         (edit-buf (get-buffer-create "*StGit edit*"))
1680         (dir default-directory)
1681         (sorted-patchsyms (stgit-sort-patches patchsyms)))
1682     (log-edit 'stgit-confirm-squash t nil edit-buf)
1683     (set (make-local-variable 'stgit-patchsyms) sorted-patchsyms)
1684     (setq default-directory dir)
1685     (let ((result (let ((standard-output edit-buf))
1686                     (apply 'stgit-run-silent "squash"
1687                            "--save-template=-" sorted-patchsyms))))
1688
1689       ;; stg squash may have reordered the patches or caused conflicts
1690       (with-current-buffer stgit-buffer
1691         (stgit-reload))
1692
1693       (unless (eq 0 result)
1694         (fundamental-mode)
1695         (rename-buffer "*StGit error*")
1696         (resize-temp-buffer-window)
1697         (switch-to-buffer-other-window stgit-buffer)
1698         (error "stg squash failed")))))
1699
1700 (defun stgit-confirm-squash ()
1701   (interactive)
1702   (let ((file (make-temp-file "stgit-edit-")))
1703     (write-region (point-min) (point-max) file)
1704     (stgit-capture-output nil
1705       (apply 'stgit-run "squash" "-f" file stgit-patchsyms))
1706     (with-current-buffer log-edit-parent-buffer
1707       (stgit-clear-marks)
1708       ;; Go to first marked patch and stay there
1709       (goto-char (point-min))
1710       (re-search-forward (concat "^[>+-]\\*") nil t)
1711       (move-to-column goal-column)
1712       (let ((pos (point)))
1713         (stgit-reload)
1714         (goto-char pos)))))
1715
1716 (defun stgit-help ()
1717   "Display help for the StGit mode."
1718   (interactive)
1719   (describe-function 'stgit-mode))
1720
1721 (defun stgit-undo (&optional arg)
1722   "Run stg undo.
1723 With prefix argument, run it with the --hard flag.
1724
1725 See also `stgit-redo'."
1726   (interactive "P")
1727   (stgit-capture-output nil
1728     (if arg
1729         (stgit-run "undo" "--hard")
1730       (stgit-run "undo")))
1731   (stgit-reload))
1732
1733 (defun stgit-redo (&optional arg)
1734   "Run stg redo.
1735 With prefix argument, run it with the --hard flag.
1736
1737 See also `stgit-undo'."
1738   (interactive "P")
1739   (stgit-capture-output nil
1740     (if arg
1741         (stgit-run "redo" "--hard")
1742       (stgit-run "redo")))
1743   (stgit-reload))
1744
1745 (defun stgit-refresh (&optional arg)
1746   "Run stg refresh.
1747 If the index contains any changes, only refresh from index.
1748
1749 With prefix argument, refresh the marked patch or the patch under point."
1750   (interactive "P")
1751   (let ((patchargs (if arg
1752                        (let ((patches (stgit-patches-marked-or-at-point)))
1753                          (cond ((null patches)
1754                                 (error "No patch to update"))
1755                                ((> (length patches) 1)
1756                                 (error "Too many patches selected"))
1757                                (t
1758                                 (cons "-p" patches))))
1759                      nil)))
1760     (unless (stgit-index-empty-p)
1761       (setq patchargs (cons "--index" patchargs)))
1762     (stgit-capture-output nil
1763       (apply 'stgit-run "refresh" patchargs))
1764     (stgit-refresh-git-status))
1765   (stgit-reload))
1766
1767 (defvar stgit-show-worktree nil
1768   "If nil, inhibit showing work tree and index in the stgit buffer.
1769
1770 See also `stgit-show-worktree-mode'.")
1771
1772 (defvar stgit-show-ignored nil
1773   "If nil, inhibit showing files ignored by git.")
1774
1775 (defvar stgit-show-unknown nil
1776   "If nil, inhibit showing files not registered with git.")
1777
1778 (defun stgit-toggle-worktree (&optional arg)
1779   "Toggle the visibility of the work tree.
1780 With ARG, show the work tree if ARG is positive.
1781
1782 Its initial setting is controlled by `stgit-default-show-worktree'.
1783
1784 `stgit-show-worktree-mode' controls where on screen the index and
1785 work tree will show up."
1786   (interactive)
1787   (setq stgit-show-worktree
1788         (if (numberp arg)
1789             (> arg 0)
1790           (not stgit-show-worktree)))
1791   (stgit-reload))
1792
1793 (defun stgit-toggle-ignored (&optional arg)
1794   "Toggle the visibility of files ignored by git in the work
1795 tree. With ARG, show these files if ARG is positive.
1796
1797 Use \\[stgit-toggle-worktree] to show the work tree."
1798   (interactive)
1799   (setq stgit-show-ignored
1800         (if (numberp arg)
1801             (> arg 0)
1802           (not stgit-show-ignored)))
1803   (stgit-reload))
1804
1805 (defun stgit-toggle-unknown (&optional arg)
1806   "Toggle the visibility of files not registered with git in the
1807 work tree. With ARG, show these files if ARG is positive.
1808
1809 Use \\[stgit-toggle-worktree] to show the work tree."
1810   (interactive)
1811   (setq stgit-show-unknown
1812         (if (numberp arg)
1813             (> arg 0)
1814           (not stgit-show-unknown)))
1815   (stgit-reload))
1816
1817 (provide 'stgit)