stgit.el: Bugfix moving symlinks to/from index
[stgit] / contrib / stgit.el
index 9c88e60..c4ed958 100644 (file)
@@ -10,6 +10,8 @@
 ;; To start: `M-x stgit'
 
 (require 'git nil t)
+(require 'cl)
+(require 'ewoc)
 
 (defun stgit (dir)
   "Manage StGit patches for the tree in DIR."
@@ -40,8 +42,8 @@ directory DIR or `default-directory'"
         (with-current-buffer git-status-buffer
           (git-refresh-status))))))
 
-(defun switch-to-stgit-buffer (dir)
-  "Switch to a (possibly new) buffer displaying StGit patches for DIR."
+(defun stgit-find-buffer (dir)
+  "Return the buffer displaying StGit patches for DIR, or nil if none."
   (setq dir (file-name-as-directory dir))
   (let ((buffers (buffer-list)))
     (while (and buffers
@@ -49,9 +51,47 @@ directory DIR or `default-directory'"
                        (and (eq major-mode 'stgit-mode)
                             (string= default-directory dir)))))
       (setq buffers (cdr buffers)))
-    (switch-to-buffer (if buffers
-                          (car buffers)
-                        (create-stgit-buffer dir)))))
+    (and buffers (car buffers))))
+
+(defun switch-to-stgit-buffer (dir)
+  "Switch to a (possibly new) buffer displaying StGit patches for DIR."
+  (setq dir (file-name-as-directory dir))
+  (let ((buffer (stgit-find-buffer dir)))
+    (switch-to-buffer (or buffer
+                         (create-stgit-buffer dir)))))
+
+(defstruct (stgit-patch)
+  status name desc empty files-ewoc)
+
+(defun stgit-patch-pp (patch)
+  (let ((status (stgit-patch-status patch))
+        (start (point))
+        (name (stgit-patch-name patch)))
+    (case name
+       (:index (insert (propertize "  Index" 'face 'italic)))
+       (:work (insert (propertize "  Work tree" 'face 'italic)))
+       (t (insert (case status
+                    ('applied "+")
+                    ('top ">")
+                    ('unapplied "-"))
+                  (if (memq name stgit-marked-patches)
+                      "*" " ")
+                  (propertize (format "%-30s"
+                                      (symbol-name name))
+                              'face (case status
+                                      ('applied 'stgit-applied-patch-face)
+                                      ('top 'stgit-top-patch-face)
+                                      ('unapplied 'stgit-unapplied-patch-face)
+                                      ('index nil)
+                                      ('work nil)))
+                  "  "
+                  (if (stgit-patch-empty patch) "(empty) " "")
+                  (propertize (or (stgit-patch-desc patch) "")
+                              'face 'stgit-description-face))))
+    (put-text-property start (point) 'entry-type 'patch)
+    (when (memq name stgit-expanded-patches)
+      (stgit-insert-patch-files patch))
+    (put-text-property start (point) 'patch-data patch)))
 
 (defun create-stgit-buffer (dir)
   "Create a buffer for showing StGit patches.
@@ -61,11 +101,17 @@ Argument DIR is the repository path."
     (with-current-buffer buf
       (setq default-directory dir)
       (stgit-mode)
+      (set (make-local-variable 'stgit-ewoc)
+           (ewoc-create #'stgit-patch-pp "Branch:\n" "--"))
       (setq buffer-read-only t))
     buf))
 
 (defmacro stgit-capture-output (name &rest body)
-  "Capture StGit output and show it in a window at the end."
+  "Capture StGit output and, if there was any output, show it in a window
+at the end.
+Returns nil if there was no output."
+  (declare (debug ([&or stringp null] body))
+           (indent 1))
   `(let ((output-buf (get-buffer-create ,(or name "*StGit output*")))
          (stgit-dir default-directory)
          (inhibit-read-only t))
@@ -80,7 +126,6 @@ Argument DIR is the repository path."
        (setq buffer-read-only t)
        (if (< (point-min) (point-max))
            (display-buffer output-buf t)))))
-(put 'stgit-capture-output 'lisp-indent-function 1)
 
 (defun stgit-make-run-args (args)
   "Return a copy of ARGS with its elements converted to strings."
@@ -115,17 +160,87 @@ Argument DIR is the repository path."
   (setq args (stgit-make-run-args args))
   (apply 'call-process "git" nil standard-output nil args))
 
+(defun stgit-index-empty-p ()
+  "Returns non-nil if the index contains no changes from HEAD."
+  (zerop (stgit-run-git-silent "diff-index" "--cached" "--quiet" "HEAD")))
+
+(defvar stgit-index-node nil)
+(defvar stgit-worktree-node nil)
+
+(defun stgit-refresh-index ()
+  (when stgit-index-node
+    (ewoc-invalidate (car stgit-index-node) (cdr stgit-index-node))))
+
+(defun stgit-refresh-worktree ()
+  (when stgit-worktree-node
+    (ewoc-invalidate (car stgit-worktree-node) (cdr stgit-worktree-node))))
+
+(defun stgit-run-series (ewoc)
+  (let ((first-line t))
+    (with-temp-buffer
+      (let ((exit-status (stgit-run-silent "series" "--description" "--empty")))
+        (goto-char (point-min))
+        (if (not (zerop exit-status))
+            (cond ((looking-at "stg series: \\(.*\\)")
+                   (ewoc-set-hf ewoc (car (ewoc-get-hf ewoc))
+                                "-- not initialized (run M-x stgit-init)"))
+                  ((looking-at ".*")
+                   (error "Error running stg: %s"
+                          (match-string 0))))
+          (while (not (eobp))
+            (unless (looking-at
+                     "\\([0 ]\\)\\([>+-]\\)\\( \\)\\([^ ]+\\) *[|#] \\(.*\\)")
+              (error "Syntax error in output from stg series"))
+            (let* ((state-str (match-string 2))
+                   (state (cond ((string= state-str ">") 'top)
+                                ((string= state-str "+") 'applied)
+                                ((string= state-str "-") 'unapplied))))
+              (ewoc-enter-last ewoc
+                               (make-stgit-patch
+                                :status state
+                                :name (intern (match-string 4))
+                                :desc (match-string 5)
+                                :empty (string= (match-string 1) "0"))))
+            (setq first-line nil)
+            (forward-line 1)))))
+    (if stgit-show-worktree
+        (setq stgit-index-node (cons ewoc (ewoc-enter-last ewoc
+                                                           (make-stgit-patch
+                                                            :status 'index
+                                                            :name :index
+                                                            :desc nil
+                                                            :empty nil)))
+              stgit-worktree-node (cons ewoc (ewoc-enter-last ewoc
+                                                              (make-stgit-patch
+                                                               :status 'work
+                                                               :name :work
+                                                               :desc nil
+                                                               :empty nil))))
+      (setq stgit-worktree-node nil))))
+
+
 (defun stgit-reload ()
   "Update the contents of the StGit buffer."
   (interactive)
   (let ((inhibit-read-only t)
         (curline (line-number-at-pos))
-        (curpatch (stgit-patch-at-point)))
-    (erase-buffer)
-    (insert "Branch: ")
-    (stgit-run-silent "branch")
-    (stgit-run-silent "series" "--description")
-    (stgit-rescan)
+        (curpatch (stgit-patch-name-at-point)))
+    (ewoc-filter stgit-ewoc #'(lambda (x) nil))
+    (ewoc-set-hf stgit-ewoc
+                 (concat "Branch: "
+                         (propertize
+                          (with-temp-buffer
+                            (stgit-run-silent "branch")
+                            (buffer-substring (point-min) (1- (point-max))))
+                          'face 'bold)
+                         "\n")
+                 (if stgit-show-worktree
+                     "--"
+                   (propertize
+                    (substitute-command-keys "--\n\"\\[stgit-toggle-worktree]\"\
+ shows the working tree\n")
+                   'face 'stgit-description-face)))
+    (stgit-run-series stgit-ewoc)
     (if curpatch
         (stgit-goto-patch curpatch)
       (goto-line curline)))
@@ -209,17 +324,18 @@ flag, which reduces performance."
             (unknown     "Unknown"     stgit-unknown-file-face)))
   "Alist of code symbols to description strings")
 
-(defun stgit-file-status-code-as-string (code)
-  "Return stgit status code as string"
-  (let ((str (assq (if (consp code) (car code) code)
-                   stgit-file-status-code-strings)))
-    (when str
+(defun stgit-file-status-code-as-string (file)
+  "Return stgit status code for FILE as a string"
+  (let* ((code (assq (stgit-file-status file)
+                     stgit-file-status-code-strings))
+         (score (stgit-file-cr-score file)))
+    (when code
       (format "%-11s  "
-              (if (and str (consp code) (/= (cdr code) 100))
-                  (format "%s %s" (cdr str)
-                          (propertize (format "%d%%" (cdr code))
+              (if (and score (/= score 100))
+                  (format "%s %s" (cdr code)
+                          (propertize (format "%d%%" score)
                                       'face 'stgit-description-face))
-                (cdr str))))))
+                (cdr code))))))
 
 (defun stgit-file-status-code (str &optional score)
   "Return stgit status code from git status string"
@@ -291,116 +407,113 @@ Cf. `stgit-file-type-change-string'."
                        (propertize (format "%o" new-perm)
                                    'face 'stgit-file-permission-face)))))))
 
-(defun stgit-expand-patch (patchsym)
-  "Expand (show modification of) the patch with name PATCHSYM (a
-symbol) at point.
-`stgit-expand-find-copies-harder' controls how hard to try to
-find copied files."
-  (save-excursion
-    (forward-line)
-    (let* ((start (point))
-           (result (with-output-to-string
-                     (stgit-run-git "diff-tree" "-r" "-z"
-                                    (if stgit-expand-find-copies-harder
-                                        "--find-copies-harder"
-                                      "-C")
-                                    (stgit-id patchsym)))))
-      (let (mstart)
-        (while (string-match "\0:\\([0-7]+\\) \\([0-7]+\\) [0-9A-Fa-f]\\{40\\} [0-9A-Fa-f]\\{40\\} \\(\\([CR]\\)\\([0-9]*\\)\0\\([^\0]*\\)\0\\([^\0]*\\)\\|\\([ABD-QS-Z]\\)\0\\([^\0]*\\)\\)"
-                             result mstart)
-          (let ((copy-or-rename (match-string 4 result))
-                (old-perm       (read (format "#o%s" (match-string 1 result))))
-                (new-perm       (read (format "#o%s" (match-string 2 result))))
-                (line-start (point))
-                status
-                change
-                properties)
-            (insert "    ")
-            (if copy-or-rename
-                (let ((cr-score       (match-string 5 result))
-                      (cr-from-file   (match-string 6 result))
-                      (cr-to-file     (match-string 7 result)))
-                  (setq status (stgit-file-status-code copy-or-rename
-                                                       cr-score)
-                        properties (list 'stgit-old-file cr-from-file
-                                         'stgit-new-file cr-to-file)
-                        change (concat
-                                cr-from-file
-                                (propertize " -> "
-                                            'face 'stgit-description-face)
-                                cr-to-file)))
-              (setq status (stgit-file-status-code (match-string 8 result))
-                    properties (list 'stgit-file (match-string 9 result))
-                    change (match-string 9 result)))
-
-            (let ((mode-change (stgit-file-mode-change-string old-perm
-                                                              new-perm)))
-              (insert (format "%-12s" (stgit-file-status-code-as-string
-                                       status))
-                      mode-change
-                      (if (> (length mode-change) 0) " " "")
-                      change
-                      (propertize (stgit-file-type-change-string old-perm
-                                                                 new-perm)
-                                  'face 'stgit-description-face)
-                      ?\n))
-            (add-text-properties line-start (point) properties))
-          (setq mstart (match-end 0))))
-      (when (= start (point))
-        (insert "    <no files>\n"))
-      (put-text-property start (point) 'stgit-file-patchsym patchsym))))
-
-(defun stgit-rescan ()
-  "Rescan the status buffer."
-  (save-excursion
-    (let ((marked ()))
+(defstruct (stgit-file)
+  old-perm new-perm copy-or-rename cr-score cr-from cr-to status file)
+
+(defun stgit-file-pp (file)
+  (let ((status (stgit-file-status file))
+        (name (if (stgit-file-copy-or-rename file)
+                  (concat (stgit-file-cr-from file)
+                          (propertize " -> "
+                                      'face 'stgit-description-face)
+                          (stgit-file-cr-to file))
+                (stgit-file-file file)))
+        (mode-change (stgit-file-mode-change-string
+                      (stgit-file-old-perm file)
+                      (stgit-file-new-perm file)))
+        (start (point)))
+    (insert (format "    %-12s%1s%s%s\n"
+                    (stgit-file-status-code-as-string file)
+                    mode-change
+                    name
+                    (propertize (stgit-file-type-change-string
+                                 (stgit-file-old-perm file)
+                                 (stgit-file-new-perm file))
+                                'face 'stgit-description-face)))
+    (add-text-properties start (point)
+                         (list 'entry-type 'file
+                               'file-data file))))
+
+(defun stgit-insert-patch-files (patch)
+  "Expand (show modification of) the patch PATCH after the line
+at point."
+  (let* ((patchsym (stgit-patch-name patch))
+         (end (progn (insert "#") (prog1 (point-marker) (forward-char -1))))
+         (args (list "-z" (if stgit-expand-find-copies-harder
+                              "--find-copies-harder"
+                            "-C")))
+         (ewoc (ewoc-create #'stgit-file-pp nil nil t)))
+    (setf (stgit-patch-files-ewoc patch) ewoc)
+    (with-temp-buffer
+      (apply 'stgit-run-git
+             (cond ((eq patchsym :work)
+                    `("diff-files" ,@args))
+                   ((eq patchsym :index)
+                    `("diff-index" ,@args "--cached" "HEAD"))
+                   (t
+                    `("diff-tree" ,@args "-r" ,(stgit-id patchsym)))))
       (goto-char (point-min))
-      (while (not (eobp))
-        (cond ((looking-at "Branch: \\(.*\\)")
-               (put-text-property (match-beginning 1) (match-end 1)
-                                  'face 'bold))
-              ((looking-at "\\([>+-]\\)\\( \\)\\([^ ]+\\) *[|#] \\(.*\\)")
-               (let ((state (match-string 1))
-                     (patchsym (intern (match-string 3))))
-                 (put-text-property
-                  (match-beginning 3) (match-end 3) 'face
-                  (cond ((string= state ">") 'stgit-top-patch-face)
-                        ((string= state "+") 'stgit-applied-patch-face)
-                        ((string= state "-") 'stgit-unapplied-patch-face)))
-                 (put-text-property (match-beginning 4) (match-end 4)
-                                    'face 'stgit-description-face)
-                 (when (memq patchsym stgit-marked-patches)
-                   (replace-match "*" nil nil nil 2)
-                   (setq marked (cons patchsym marked)))
-                 (put-text-property (match-beginning 0) (match-end 0)
-                                    'stgit-patchsym patchsym)
-                 (when (memq patchsym stgit-expanded-patches)
-                   (stgit-expand-patch patchsym))
-                 ))
-              ((or (looking-at "stg series: Branch \".*\" not initialised")
-                   (looking-at "stg series: .*: branch not initialized"))
-               (forward-line 1)
-               (insert "Run M-x stgit-init to initialise")))
-        (forward-line 1))
-      (setq stgit-marked-patches (nreverse marked)))))
+      (unless (or (eobp) (memq patchsym '(:work :index)))
+        (forward-char 41))
+      (while (looking-at ":\\([0-7]+\\) \\([0-7]+\\) [0-9A-Fa-f]\\{40\\} [0-9A-Fa-f]\\{40\\} ")
+        (let ((old-perm (string-to-number (match-string 1) 8))
+              (new-perm (string-to-number (match-string 2) 8)))
+          (goto-char (match-end 0))
+          (let ((file
+                 (cond ((looking-at
+                         "\\([CR]\\)\\([0-9]*\\)\0\\([^\0]*\\)\0\\([^\0]*\\)\0")
+                        (make-stgit-file
+                         :old-perm       old-perm
+                         :new-perm       new-perm
+                         :copy-or-rename t
+                         :cr-score       (string-to-number (match-string 2))
+                         :cr-from        (match-string 3)
+                         :cr-to          (match-string 4)
+                         :status         (stgit-file-status-code (match-string 1))
+                         :file           (match-string 3)))
+                       ((looking-at "\\([ABD-QS-Z]\\)\0\\([^\0]*\\)\0")
+                        (make-stgit-file
+                         :old-perm       old-perm
+                         :new-perm       new-perm
+                         :copy-or-rename nil
+                         :cr-score       nil
+                         :cr-from        nil
+                         :cr-to          nil
+                         :status         (stgit-file-status-code (match-string 1))
+                         :file           (match-string 2))))))
+            (ewoc-enter-last ewoc file))
+          (goto-char (match-end 0))))
+      (unless (ewoc-nth ewoc 0)
+        (ewoc-set-hf ewoc "" (propertize "    <no files>\n"
+                                         'face 'stgit-description-face))))
+    (goto-char end)
+    (delete-char -2)))
+
+(defun stgit-select-file ()
+  (let ((filename (expand-file-name
+                   (stgit-file-file (stgit-patched-file-at-point)))))
+    (unless (file-exists-p filename)
+      (error "File does not exist"))
+    (find-file filename)))
+
+(defun stgit-select-patch ()
+  (let ((patchname (stgit-patch-name-at-point)))
+    (if (memq patchname stgit-expanded-patches)
+        (setq stgit-expanded-patches (delq patchname stgit-expanded-patches))
+      (setq stgit-expanded-patches (cons patchname stgit-expanded-patches)))
+    (ewoc-invalidate stgit-ewoc (ewoc-locate stgit-ewoc)))
+  (move-to-column (stgit-goal-column)))
 
 (defun stgit-select ()
   "Expand or collapse the current entry"
   (interactive)
-  (let ((curpatch (stgit-patch-at-point)))
-    (if (not curpatch)
-        (let ((patched-file (stgit-patched-file-at-point)))
-          (unless patched-file
-            (error "No patch or file on the current line"))
-          (let ((filename (expand-file-name (cdr patched-file))))
-            (unless (file-exists-p filename)
-              (error "File does not exist"))
-            (find-file filename)))
-      (setq stgit-expanded-patches
-            (if (memq curpatch stgit-expanded-patches)
-                (delq curpatch stgit-expanded-patches)
-              (cons curpatch stgit-expanded-patches)))
-      (stgit-reload))))
+  (case (get-text-property (point) 'entry-type)
+    ('patch
+     (stgit-select-patch))
+    ('file
+     (stgit-select-file))
+    (t
+     (error "No patch or file on line"))))
 
 (defun stgit-find-file-other-window ()
   "Open file at point in other window"
@@ -408,7 +521,7 @@ find copied files."
   (let ((patched-file (stgit-patched-file-at-point)))
     (unless patched-file
       (error "No file on the current line"))
-    (let ((filename (expand-file-name (cdr patched-file))))
+    (let ((filename (expand-file-name (stgit-file-file patched-file))))
       (unless (file-exists-p filename)
         (error "File does not exist"))
       (find-file-other-window filename))))
@@ -428,43 +541,36 @@ find copied files."
       (pop-to-buffer nil)
       (git-status dir))))
 
-(defun stgit-next-line (&optional arg try-vscroll)
+(defun stgit-goal-column ()
+  "Return goal column for the current line"
+  (case (get-text-property (point) 'entry-type)
+    ('patch 2)
+    ('file 4)
+    (t 0)))
+
+(defun stgit-next-line (&optional arg)
   "Move cursor vertically down ARG lines"
-  (interactive "p\np")
-  (next-line arg try-vscroll)
-  (when (looking-at "  \\S-")
-    (forward-char 2)))
+  (interactive "p")
+  (next-line arg)
+  (move-to-column (stgit-goal-column)))
 
-(defun stgit-previous-line (&optional arg try-vscroll)
+(defun stgit-previous-line (&optional arg)
   "Move cursor vertically up ARG lines"
-  (interactive "p\np")
-  (previous-line arg try-vscroll)
-  (when (looking-at "  \\S-")
-    (forward-char 2)))
+  (interactive "p")
+  (previous-line arg)
+  (move-to-column (stgit-goal-column)))
 
 (defun stgit-next-patch (&optional arg)
-  "Move cursor down ARG patches"
+  "Move cursor down ARG patches."
   (interactive "p")
-  (unless arg
-    (setq arg 1))
-  (if (< arg 0)
-      (stgit-previous-patch (- arg))
-    (while (not (zerop arg))
-      (setq arg (1- arg))
-      (while (progn (stgit-next-line)
-                    (not (stgit-patch-at-point)))))))
+  (ewoc-goto-next stgit-ewoc (or arg 1))
+  (move-to-column goal-column))
 
 (defun stgit-previous-patch (&optional arg)
-  "Move cursor up ARG patches"
+  "Move cursor up ARG patches."
   (interactive "p")
-  (unless arg
-    (setq arg 1))
-  (if (< arg 0)
-      (stgit-next-patch (- arg))
-    (while (not (zerop arg))
-      (setq arg (1- arg))
-      (while (progn (stgit-previous-line)
-                    (not (stgit-patch-at-point)))))))
+  (ewoc-goto-prev stgit-ewoc (or arg 1))
+  (move-to-column goal-column))
 
 (defvar stgit-mode-hook nil
   "Run after `stgit-mode' is setup.")
@@ -473,42 +579,52 @@ find copied files."
   "Keymap for StGit major mode.")
 
 (unless stgit-mode-map
-  (setq stgit-mode-map (make-keymap))
-  (suppress-keymap stgit-mode-map)
-  (mapc (lambda (arg) (define-key stgit-mode-map (car arg) (cdr arg)))
-        '((" " .        stgit-mark)
-          ("m" .        stgit-mark)
-          ("\d" .       stgit-unmark-up)
-          ("u" .        stgit-unmark-down)
-          ("?" .        stgit-help)
-          ("h" .        stgit-help)
-          ("p" .        stgit-previous-line)
-          ("n" .        stgit-next-line)
-          ("\C-p" .     stgit-previous-patch)
-          ("\C-n" .     stgit-next-patch)
-          ("\M-{" .     stgit-previous-patch)
-          ("\M-}" .     stgit-next-patch)
-          ("s" .        stgit-git-status)
-          ("g" .        stgit-reload)
-          ("r" .        stgit-refresh)
-          ("\C-c\C-r" . stgit-rename)
-          ("e" .        stgit-edit)
-          ("c" .        stgit-coalesce)
-          ("N" .        stgit-new)
-          ("R" .        stgit-repair)
-          ("C" .        stgit-commit)
-          ("U" .        stgit-uncommit)
-          ("\r" .       stgit-select)
-          ("o" .        stgit-find-file-other-window)
-          (">" .        stgit-push-next)
-          ("<" .        stgit-pop-next)
-          ("P" .        stgit-push-or-pop)
-          ("G" .        stgit-goto)
-          ("=" .        stgit-show)
-          ("D" .        stgit-delete)
-          ([(control ?/)] . stgit-undo)
-          ("\C-_" .     stgit-undo)
-          ("q" . stgit-quit))))
+  (let ((toggle-map (make-keymap)))
+    (suppress-keymap toggle-map)
+    (mapc (lambda (arg) (define-key toggle-map (car arg) (cdr arg)))
+          '(("t" .        stgit-toggle-worktree)))
+    (setq stgit-mode-map (make-keymap))
+    (suppress-keymap stgit-mode-map)
+    (mapc (lambda (arg) (define-key stgit-mode-map (car arg) (cdr arg)))
+          `((" " .        stgit-mark)
+            ("m" .        stgit-mark)
+            ("\d" .       stgit-unmark-up)
+            ("u" .        stgit-unmark-down)
+            ("?" .        stgit-help)
+            ("h" .        stgit-help)
+            ("\C-p" .     stgit-previous-line)
+            ("\C-n" .     stgit-next-line)
+            ([up] .       stgit-previous-line)
+            ([down] .     stgit-next-line)
+            ("p" .        stgit-previous-patch)
+            ("n" .        stgit-next-patch)
+            ("\M-{" .     stgit-previous-patch)
+            ("\M-}" .     stgit-next-patch)
+            ("s" .        stgit-git-status)
+            ("g" .        stgit-reload)
+            ("r" .        stgit-refresh)
+            ("\C-c\C-r" . stgit-rename)
+            ("e" .        stgit-edit)
+            ("M" .        stgit-move-patches)
+            ("S" .        stgit-squash)
+            ("N" .        stgit-new)
+            ("R" .        stgit-repair)
+            ("C" .        stgit-commit)
+            ("U" .        stgit-uncommit)
+            ("\r" .       stgit-select)
+            ("o" .        stgit-find-file-other-window)
+            ("i" .        stgit-file-toggle-index)
+            (">" .        stgit-push-next)
+            ("<" .        stgit-pop-next)
+            ("P" .        stgit-push-or-pop)
+            ("G" .        stgit-goto)
+            ("=" .        stgit-show)
+            ("D" .        stgit-delete)
+            ([(control ?/)] . stgit-undo)
+            ("\C-_" .     stgit-undo)
+            ("B" .        stgit-branch)
+            ("t" .        ,toggle-map)
+            ("q" .        stgit-quit)))))
 
 (defun stgit-mode ()
   "Major mode for interacting with StGit.
@@ -523,9 +639,21 @@ Commands:
   (set (make-local-variable 'list-buffers-directory) default-directory)
   (set (make-local-variable 'stgit-marked-patches) nil)
   (set (make-local-variable 'stgit-expanded-patches) nil)
+  (set (make-local-variable 'stgit-show-worktree) stgit-default-show-worktree)
   (set-variable 'truncate-lines 't)
+  (add-hook 'after-save-hook 'stgit-update-saved-file)
   (run-hooks 'stgit-mode-hook))
 
+(defun stgit-update-saved-file ()
+  (let* ((file (expand-file-name buffer-file-name))
+         (dir (file-name-directory file))
+         (gitdir (condition-case nil (git-get-top-dir dir)
+                   (error nil)))
+        (buffer (and gitdir (stgit-find-buffer gitdir))))
+    (when buffer
+      (with-current-buffer buffer
+        (stgit-refresh-worktree)))))
+
 (defun stgit-add-mark (patchsym)
   "Mark the patch PATCHSYM."
   (setq stgit-marked-patches (cons patchsym stgit-marked-patches)))
@@ -538,57 +666,39 @@ Commands:
   "Unmark all patches."
   (setq stgit-marked-patches '()))
 
-(defun stgit-patch-at-point (&optional cause-error allow-file)
+(defun stgit-patch-at-point (&optional cause-error)
+  (get-text-property (point) 'patch-data))
+
+(defun stgit-patch-name-at-point (&optional cause-error)
   "Return the patch name on the current line as a symbol.
-If CAUSE-ERROR is not nil, signal an error if none found.
-If ALLOW-FILE is not nil, also handle when point is on a file of
-a patch."
-  (or (get-text-property (point) 'stgit-patchsym)
-      (and allow-file
-           (get-text-property (point) 'stgit-file-patchsym))
-      (when cause-error
-        (error "No patch on this line"))))
-
-(defun stgit-patched-file-at-point (&optional both-files)
-  "Returns a cons of the patchsym and file name at point. For
-copies and renames, return the new file if the patch is either
-applied. If BOTH-FILES is non-nil, return a cons of the old and
-the new file names instead of just one name."
-  (let ((patchsym (get-text-property (point) 'stgit-file-patchsym))
-        (file     (get-text-property (point) 'stgit-file)))
-    (cond ((not patchsym) nil)
-          (file (cons patchsym file))
-          (both-files
-           (cons patchsym (cons (get-text-property (point) 'stgit-old-file)
-                                (get-text-property (point) 'stgit-new-file))))
-          (t
-           (let ((file-sym (save-excursion
-                             (stgit-previous-patch)
-                             (unless (eq (stgit-patch-at-point)
-                                         patchsym)
-                               (error "Cannot find the %s patch" patchsym))
-                             (beginning-of-line)
-                             (if (= (char-after) ?-)
-                                 'stgit-old-file 
-                               'stgit-new-file))))
-             (cons patchsym (get-text-property (point) file-sym)))))))
+If CAUSE-ERROR is not nil, signal an error if none found."
+  (let ((patch (stgit-patch-at-point)))
+    (cond (patch
+           (stgit-patch-name patch))
+          (cause-error
+           (error "No patch on this line")))))
+
+(defun stgit-patched-file-at-point ()
+  (get-text-property (point) 'file-data))
 
 (defun stgit-patches-marked-or-at-point ()
   "Return the symbols of the marked patches, or the patch on the current line."
   (if stgit-marked-patches
       stgit-marked-patches
-    (let ((patch (stgit-patch-at-point)))
+    (let ((patch (stgit-patch-name-at-point)))
       (if patch
           (list patch)
         '()))))
 
 (defun stgit-goto-patch (patchsym)
   "Move point to the line containing patch PATCHSYM.
-If that patch cannot be found, return nil."
-  (let ((p (text-property-any (point-min) (point-max)
-                              'stgit-patchsym patchsym)))
-    (when p
-      (goto-char p)
+If that patch cannot be found, do nothing."
+  (let ((node (ewoc-nth stgit-ewoc 0)))
+    (while (and node (not (eq (stgit-patch-name (ewoc-data node))
+                              patchsym)))
+      (setq node (ewoc-next stgit-ewoc node)))
+    (when node
+      (ewoc-goto-node stgit-ewoc node)
       (move-to-column goal-column))))
 
 (defun stgit-init ()
@@ -601,30 +711,36 @@ If that patch cannot be found, return nil."
 (defun stgit-mark ()
   "Mark the patch under point."
   (interactive)
-  (let ((patch (stgit-patch-at-point t)))
-    (stgit-add-mark patch)
-    (stgit-reload))
+  (let* ((node (ewoc-locate stgit-ewoc))
+         (patch (ewoc-data node)))
+    (stgit-add-mark (stgit-patch-name patch))
+    (ewoc-invalidate stgit-ewoc node))
   (stgit-next-patch))
 
 (defun stgit-unmark-up ()
   "Remove mark from the patch on the previous line."
   (interactive)
   (stgit-previous-patch)
-  (stgit-remove-mark (stgit-patch-at-point t))
-  (stgit-reload))
+  (let* ((node (ewoc-locate stgit-ewoc))
+         (patch (ewoc-data node)))
+    (stgit-remove-mark (stgit-patch-name patch))
+    (ewoc-invalidate stgit-ewoc node))
+  (move-to-column (stgit-goal-column)))
 
 (defun stgit-unmark-down ()
   "Remove mark from the patch on the current line."
   (interactive)
-  (stgit-remove-mark (stgit-patch-at-point t))
-  (stgit-reload)
+  (let* ((node (ewoc-locate stgit-ewoc))
+         (patch (ewoc-data node)))
+    (stgit-remove-mark (stgit-patch-name patch))
+    (ewoc-invalidate stgit-ewoc node))
   (stgit-next-patch))
 
 (defun stgit-rename (name)
   "Rename the patch under point to NAME."
   (interactive (list (read-string "Patch name: "
-                                  (symbol-name (stgit-patch-at-point t)))))
-  (let ((old-patchsym (stgit-patch-at-point t)))
+                                  (symbol-name (stgit-patch-name-at-point t)))))
+  (let ((old-patchsym (stgit-patch-name-at-point t)))
     (stgit-capture-output nil
       (stgit-run "rename" old-patchsym name))
     (let ((name-sym (intern name)))
@@ -644,16 +760,36 @@ If that patch cannot be found, return nil."
     (stgit-run "repair"))
   (stgit-reload))
 
-(defun stgit-commit ()
-  "Run stg commit."
-  (interactive)
-  (stgit-capture-output nil (stgit-run "commit"))
+(defun stgit-available-branches ()
+  "Returns a list of the available stg branches"
+  (let ((output (with-output-to-string
+                  (stgit-run "branch" "--list")))
+        (start 0)
+        result)
+    (while (string-match "^>?\\s-+s\\s-+\\(\\S-+\\)" output start)
+      (setq result (cons (match-string 1 output) result))
+      (setq start (match-end 0)))
+    result))
+
+(defun stgit-branch (branch)
+  "Switch to branch BRANCH."
+  (interactive (list (completing-read "Switch to branch: "
+                                      (stgit-available-branches))))
+  (stgit-capture-output nil (stgit-run "branch" "--" branch))
   (stgit-reload))
 
-(defun stgit-uncommit (arg)
-  "Run stg uncommit. Numeric arg determines number of patches to uncommit."
+(defun stgit-commit (count)
+  "Run stg commit on COUNT commits.
+Interactively, the prefix argument is used as COUNT."
   (interactive "p")
-  (stgit-capture-output nil (stgit-run "uncommit" "-n" arg))
+  (stgit-capture-output nil (stgit-run "commit" "-n" count))
+  (stgit-reload))
+
+(defun stgit-uncommit (count)
+  "Run stg uncommit on COUNT commits.
+Interactively, the prefix argument is used as COUNT."
+  (interactive "p")
+  (stgit-capture-output nil (stgit-run "uncommit" "-n" count))
   (stgit-reload))
 
 (defun stgit-push-next (npatches)
@@ -681,7 +817,7 @@ With numeric prefix argument, pop that many patches."
 (defun stgit-push-or-pop ()
   "Push or pop the patch on the current line."
   (interactive)
-  (let ((patchsym (stgit-patch-at-point t))
+  (let ((patchsym (stgit-patch-name-at-point t))
         (applied (stgit-applied-at-point)))
     (stgit-capture-output nil
       (stgit-run (if applied "pop" "push") patchsym))
@@ -690,48 +826,88 @@ With numeric prefix argument, pop that many patches."
 (defun stgit-goto ()
   "Go to the patch on the current line."
   (interactive)
-  (let ((patchsym (stgit-patch-at-point t)))
+  (let ((patchsym (stgit-patch-name-at-point t)))
     (stgit-capture-output nil
       (stgit-run "goto" patchsym))
     (stgit-reload)))
 
 (defun stgit-id (patchsym)
-  "Return the git commit id for PATCHSYM."
-  (let ((result (with-output-to-string
-                  (stgit-run-silent "id" patchsym))))
-    (unless (string-match "^\\([0-9A-Fa-f]\\{40\\}\\)$" result)
-      (error "Cannot find commit id for %s" patchsym))
-    (match-string 1 result)))
+  "Return the git commit id for PATCHSYM.
+If PATCHSYM is a keyword, returns PATCHSYM unmodified."
+  (if (keywordp patchsym)
+      patchsym
+    (let ((result (with-output-to-string
+                   (stgit-run-silent "id" patchsym))))
+      (unless (string-match "^\\([0-9A-Fa-f]\\{40\\}\\)$" result)
+       (error "Cannot find commit id for %s" patchsym))
+      (match-string 1 result))))
 
 (defun stgit-show ()
   "Show the patch on the current line."
   (interactive)
   (stgit-capture-output "*StGit patch*"
-    (let ((patchsym (stgit-patch-at-point)))
-      (if (not patchsym)
-          (let ((patched-file (stgit-patched-file-at-point t)))
-            (unless patched-file
-              (error "No patch or file at point"))
-            (let ((id (stgit-id (car patched-file))))
-              (with-output-to-temp-buffer "*StGit diff*"
-                (if (consp (cdr patched-file))
-                    ;; two files (copy or rename)
-                    (stgit-run-git "diff" "-C" "-C" (concat id "^") id "--"
-                                   (cadr patched-file) (cddr patched-file))
-                  ;; just one file
-                  (stgit-run-git "diff" (concat id "^") id "--"
-                                 (cdr patched-file)))
-                (with-current-buffer standard-output
-                  (diff-mode)))))
-        (stgit-run "show" patchsym)
-        (with-current-buffer standard-output
-          (goto-char (point-min))
-          (diff-mode))))))
+    (case (get-text-property (point) 'entry-type)
+      ('file
+       (let* ((patched-file (stgit-patched-file-at-point))
+              (patch-name (stgit-patch-name-at-point))
+              (patch-id (stgit-id patch-name))
+              (args (append (and (stgit-file-cr-from patched-file)
+                                 (if stgit-expand-find-copies-harder
+                                     '("--find-copies-harder")
+                                   '("-C")))
+                            (cond ((eq patch-id :index)
+                                   '("--cached"))
+                                  ((eq patch-id :work)
+                                   nil)
+                                  (t
+                                   (list (concat patch-id "^") patch-id)))
+                            '("--")
+                              (if (stgit-file-copy-or-rename patched-file)
+                                  (list (stgit-file-cr-from patched-file)
+                                        (stgit-file-cr-to patched-file))
+                                (list (stgit-file-file patched-file))))))
+         (apply 'stgit-run-git "diff" args)))
+      ('patch
+       (stgit-run "show" "-O" "--patch-with-stat" "-O" "-M"
+                  (stgit-patch-name-at-point)))
+      (t
+       (error "No patch or file at point")))
+    (with-current-buffer standard-output
+      (goto-char (point-min))
+      (diff-mode))))
+
+(defun stgit-move-change-to-index (file)
+  "Copies the workspace state of FILE to index, using git add or git rm"
+  (let ((op (if (or (file-exists-p file) (file-symlink-p file))
+                '("add") '("rm" "-q"))))
+    (stgit-capture-output "*git output*"
+      (apply 'stgit-run-git (append op '("--") (list file))))))
+
+(defun stgit-remove-change-from-index (file)
+  "Unstages the change in FILE from the index"
+  (stgit-capture-output "*git output*"
+    (stgit-run-git "reset" "-q" "--" file)))
+
+(defun stgit-file-toggle-index ()
+  "Move modified file in or out of the index."
+  (interactive)
+  (let ((patched-file (stgit-patched-file-at-point)))
+    (unless patched-file
+      (error "No file on the current line"))
+    (let ((patch-name (stgit-patch-name-at-point)))
+      (cond ((eq patch-name :work)
+             (stgit-move-change-to-index (stgit-file-file patched-file)))
+            ((eq patch-name :index)
+             (stgit-remove-change-from-index (stgit-file-file patched-file)))
+            (t
+             (error "Can only move files in the working tree to index")))))
+  (stgit-refresh-worktree)
+  (stgit-refresh-index))
 
 (defun stgit-edit ()
   "Edit the patch on the current line."
   (interactive)
-  (let ((patchsym (stgit-patch-at-point t))
+  (let ((patchsym (stgit-patch-name-at-point t))
         (edit-buf (get-buffer-create "*StGit edit*"))
         (dir default-directory))
     (log-edit 'stgit-confirm-edit t nil edit-buf)
@@ -791,40 +967,132 @@ end of the patch."
            (substring patch 0 20))
           (t patch))))
 
-(defun stgit-delete (patchsyms)
+(defun stgit-delete (patchsyms &optional spill-p)
   "Delete the patches in PATCHSYMS.
-Interactively, delete the marked patches, or the patch at point."
-  (interactive (list (stgit-patches-marked-or-at-point)))
+Interactively, delete the marked patches, or the patch at point.
+
+With a prefix argument, or SPILL-P, spill the patch contents to
+the work tree and index."
+  (interactive (list (stgit-patches-marked-or-at-point)
+                     current-prefix-arg))
+  (unless patchsyms
+    (error "No patches to delete"))
   (let ((npatches (length patchsyms)))
-    (if (zerop npatches)
-        (error "No patches to delete")
-      (when (yes-or-no-p (format "Really delete %d patch%s? "
-                                 npatches
-                                 (if (= 1 npatches) "" "es")))
+    (when (yes-or-no-p (format "Really delete %d patch%s%s? "
+                              npatches
+                              (if (= 1 npatches) "" "es")
+                               (if spill-p
+                                   " (spilling contents to index)"
+                                 "")))
+      (let ((args (if spill-p 
+                      (cons "--spill" patchsyms)
+                    patchsyms)))
         (stgit-capture-output nil
-          (apply 'stgit-run "delete" patchsyms))
+          (apply 'stgit-run "delete" args))
         (stgit-reload)))))
 
-(defun stgit-coalesce (patchsyms)
-  "Coalesce the patches in PATCHSYMS.
-Interactively, coalesce the marked patches."
+(defun stgit-move-patches-target ()
+  "Return the patchsym indicating a target patch for
+`stgit-move-patches'.
+
+This is either the patch at point, or one of :top and :bottom, if
+the point is after or before the applied patches."
+
+  (let ((patchsym (stgit-patch-name-at-point)))
+    (cond (patchsym patchsym)
+         ((save-excursion (re-search-backward "^>" nil t)) :top)
+         (t :bottom))))
+
+(defun stgit-sort-patches (patchsyms)
+  "Returns the list of patches in PATCHSYMS sorted according to
+their position in the patch series, bottommost first.
+
+PATCHSYMS may not contain duplicate entries."
+  (let (sorted-patchsyms
+        (series (with-output-to-string
+                  (with-current-buffer standard-output
+                    (stgit-run-silent "series" "--noprefix"))))
+        start)
+    (while (string-match "^\\(.+\\)" series start)
+      (let ((patchsym (intern (match-string 1 series))))
+        (when (memq patchsym patchsyms)
+          (setq sorted-patchsyms (cons patchsym sorted-patchsyms))))
+      (setq start (match-end 0)))
+    (setq sorted-patchsyms (nreverse sorted-patchsyms))
+
+    (unless (= (length patchsyms) (length sorted-patchsyms))
+      (error "Internal error"))
+
+    sorted-patchsyms))
+
+(defun stgit-move-patches (patchsyms target-patch)
+  "Move the patches in PATCHSYMS to below TARGET-PATCH.
+If TARGET-PATCH is :bottom or :top, move the patches to the
+bottom or top of the stack, respectively.
+
+Interactively, move the marked patches to where the point is."
+  (interactive (list stgit-marked-patches
+                     (stgit-move-patches-target)))
+  (unless patchsyms
+    (error "Need at least one patch to move"))
+
+  (unless target-patch
+    (error "Point not at a patch"))
+
+  (if (eq target-patch :top)
+      (stgit-capture-output nil
+        (apply 'stgit-run "float" patchsyms))
+
+    ;; need to have patchsyms sorted by position in the stack
+    (let ((sorted-patchsyms (stgit-sort-patches patchsyms)))
+      (while sorted-patchsyms
+        (setq sorted-patchsyms
+              (and (stgit-capture-output nil
+                     (if (eq target-patch :bottom)
+                         (stgit-run "sink" "--" (car sorted-patchsyms))
+                       (stgit-run "sink" "--to" target-patch "--"
+                                  (car sorted-patchsyms))))
+                   (cdr sorted-patchsyms))))))
+  (stgit-reload))
+
+(defun stgit-squash (patchsyms)
+  "Squash the patches in PATCHSYMS.
+Interactively, squash the marked patches.
+
+Unless there are any conflicts, the patches will be merged into
+one patch, which will occupy the same spot in the series as the
+deepest patch had before the squash."
   (interactive (list stgit-marked-patches))
   (when (< (length patchsyms) 2)
-    (error "Need at least two patches to coalesce"))
-  (let ((edit-buf (get-buffer-create "*StGit edit*"))
-        (dir default-directory))
-    (log-edit 'stgit-confirm-coalesce t nil edit-buf)
-    (set (make-local-variable 'stgit-patchsyms) patchsyms)
+    (error "Need at least two patches to squash"))
+  (let ((stgit-buffer (current-buffer))
+        (edit-buf (get-buffer-create "*StGit edit*"))
+        (dir default-directory)
+        (sorted-patchsyms (stgit-sort-patches patchsyms)))
+    (log-edit 'stgit-confirm-squash t nil edit-buf)
+    (set (make-local-variable 'stgit-patchsyms) sorted-patchsyms)
     (setq default-directory dir)
-    (let ((standard-output edit-buf))
-      (apply 'stgit-run-silent "coalesce" "--save-template=-" patchsyms))))
-
-(defun stgit-confirm-coalesce ()
+    (let ((result (let ((standard-output edit-buf))
+                    (apply 'stgit-run-silent "squash"
+                           "--save-template=-" sorted-patchsyms))))
+
+      ;; stg squash may have reordered the patches or caused conflicts
+      (with-current-buffer stgit-buffer
+        (stgit-reload))
+
+      (unless (eq 0 result)
+        (fundamental-mode)
+        (rename-buffer "*StGit error*")
+        (resize-temp-buffer-window)
+        (switch-to-buffer-other-window stgit-buffer)
+        (error "stg squash failed")))))
+
+(defun stgit-confirm-squash ()
   (interactive)
   (let ((file (make-temp-file "stgit-edit-")))
     (write-region (point-min) (point-max) file)
     (stgit-capture-output nil
-      (apply 'stgit-run "coalesce" "-f" file stgit-patchsyms))
+      (apply 'stgit-run "squash" "-f" file stgit-patchsyms))
     (with-current-buffer log-edit-parent-buffer
       (stgit-clear-marks)
       ;; Go to first marked patch and stay there
@@ -868,4 +1136,29 @@ With prefix argument, refresh the marked patch or the patch under point."
     (stgit-refresh-git-status))
   (stgit-reload))
 
+(defcustom stgit-default-show-worktree
+  nil
+  "Set to non-nil to by default show the working tree in a new stgit buffer.
+
+This value is used as the default value for `stgit-show-worktree'."
+  :type 'boolean
+  :group 'stgit)
+
+(defvar stgit-show-worktree nil
+  "Show work tree and index in the stgit buffer.
+
+See `stgit-default-show-worktree' for its default value.")
+
+(defun stgit-toggle-worktree (&optional arg)
+  "Toggle the visibility of the work tree.
+With arg, show the work tree if arg is positive.
+
+Its initial setting is controlled by `stgit-default-show-worktree'."
+  (interactive)
+  (setq stgit-show-worktree
+        (if (numberp arg)
+            (> arg 0)
+          (not stgit-show-worktree)))
+  (stgit-reload))
+
 (provide 'stgit)