+ "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-patch (unmerged-stage ignore-whitespace)
+ "Show the patch on the current line.
+
+UNMERGED-STAGE is the argument to `git-diff' that that selects
+which stage to diff against in the case of unmerged files."
+ (let ((space-arg (when (numberp ignore-whitespace)
+ (cond ((> ignore-whitespace 4)
+ "--ignore-all-space")
+ ((> ignore-whitespace 1)
+ "--ignore-space-change"))))
+ (patch-name (stgit-patch-name-at-point t)))
+ (stgit-capture-output "*StGit patch*"
+ (case (get-text-property (point) 'entry-type)
+ ('file
+ (let* ((patched-file (stgit-patched-file-at-point))
+ (patch-id (let ((id (stgit-id patch-name)))
+ (if (and (eq id :index)
+ (eq (stgit-file-status patched-file)
+ 'unmerged))
+ :work
+ id)))
+ (args (append (and space-arg (list space-arg))
+ (and (stgit-file-cr-from patched-file)
+ (list (stgit-find-copies-harder-diff-arg)))
+ (cond ((eq patch-id :index)
+ '("--cached"))
+ ((eq patch-id :work)
+ (list unmerged-stage))
+ (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
+ (let* ((patch-id (stgit-id patch-name)))
+ (if (or (eq patch-id :index) (eq patch-id :work))
+ (apply 'stgit-run-git "diff"
+ (stgit-find-copies-harder-diff-arg)
+ (append (and space-arg (list space-arg))
+ (if (eq patch-id :index)
+ '("--cached")
+ (list unmerged-stage))))
+ (let ((args (append '("show" "-O" "--patch-with-stat" "-O" "-M")
+ (and space-arg (list "-O" space-arg))
+ (list (stgit-patch-name-at-point)))))
+ (apply 'stgit-run args)))))
+ (t
+ (error "No patch or file at point")))
+ (with-current-buffer standard-output
+ (goto-char (point-min))
+ (diff-mode)))))
+
+(defmacro stgit-define-diff (name diff-arg &optional unmerged-action)
+ `(defun ,name (&optional ignore-whitespace)
+ ,(format "Show the patch on the current line.
+
+%sWith a prefix argument, ignore whitespace. With a prefix argument
+greater than four (e.g., \\[universal-argument] \
+\\[universal-argument] \\[%s]), ignore all whitespace."
+ (if unmerged-action
+ (format "For unmerged files, %s.\n\n" unmerged-action)
+ "")
+ name)
+ (interactive "p")
+ (stgit-show-patch ,diff-arg ignore-whitespace)))
+
+(stgit-define-diff stgit-diff
+ "--ours" nil)
+(stgit-define-diff stgit-diff-ours
+ "--ours"
+ "diff against our branch")
+(stgit-define-diff stgit-diff-theirs
+ "--theirs"
+ "diff against their branch")
+(stgit-define-diff stgit-diff-base
+ "--base"
+ "diff against the merge base")
+(stgit-define-diff stgit-diff-combined
+ "--cc"
+ "show a combined diff")
+
+(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.
+
+Leaves the point where it is, but moves the mark to where the
+file ended up. You can then jump to the file with \
+\\[exchange-point-and-mark]."