-;;; git-blame.el
-;; David Kågedal <davidk@lysator.liu.se>
-;; Message-ID: <87iren2vqx.fsf@morpheus.local>
-
-(require 'cl)
-(defun color-scale (l)
- (let* ((colors ())
- r g b)
- (setq r l)
- (while r
- (setq g l)
- (while g
- (setq b l)
- (while b
- (push (concat "#" (car r) (car g) (car b)) colors)
- (pop b))
- (pop g))
- (pop r))
- colors))
-
-(defvar git-blame-dark-colors
- (color-scale '("00" "04" "08" "0c"
- "10" "14" "18" "1c"
- "20" "24" "28" "2c"
- "30" "34" "38" "3c")))
-
-(defvar git-blame-light-colors
- (color-scale '("c0" "c4" "c8" "cc"
- "d0" "d4" "d8" "dc"
- "e0" "e4" "e8" "ec"
- "f0" "f4" "f8" "fc")))
-
-(defvar git-blame-ancient-color "dark green")
-
-(defvar git-blame-overlays nil)
-(defvar git-blame-cache nil)
-
-(defvar git-blame-mode nil)
-(make-variable-buffer-local 'git-blame-mode)
-(push (list 'git-blame-mode " blame") minor-mode-alist)
-
-(defun git-blame-mode (&optional arg)
- (interactive "P")
- (if arg
- (setq git-blame-mode (eq arg 1))
- (setq git-blame-mode (not git-blame-mode)))
- (make-local-variable 'git-blame-overlays)
- (make-local-variable 'git-blame-colors)
- (make-local-variable 'git-blame-cache)
- (let ((bgmode (cdr (assoc 'background-mode (frame-parameters)))))
- (if (eq bgmode 'dark)
- (setq git-blame-colors git-blame-dark-colors)
- (setq git-blame-colors git-blame-light-colors)))
- (if git-blame-mode
- (git-blame-run)
- (git-blame-cleanup)))
-
-(defun git-blame-run ()
- (let* ((display-buf (current-buffer))
- (blame-buf (get-buffer-create
- (concat " git blame for " (buffer-name))))
- (proc (start-process "git-blame" blame-buf
- "git" "blame" "--incremental"
- (file-name-nondirectory buffer-file-name))))
- (mapcar 'delete-overlay git-blame-overlays)
- (setq git-blame-overlays nil)
- (setq git-blame-cache (make-hash-table :test 'equal))
- (with-current-buffer blame-buf
- (erase-buffer)
- (make-local-variable 'git-blame-file)
- (make-local-variable 'git-blame-current)
- (setq git-blame-file display-buf)
- (setq git-blame-current nil))
- (set-process-filter proc 'git-blame-filter)
- (set-process-sentinel proc 'git-blame-sentinel)))
-
-(defun git-blame-cleanup ()
- "Remove all blame properties"
- (mapcar 'delete-overlay git-blame-overlays)
- (setq git-blame-overlays nil)
- (let ((modified (buffer-modified-p)))
- (remove-text-properties (point-min) (point-max) '(point-entered nil))
- (set-buffer-modified-p modified)))
-
-(defun git-blame-sentinel (proc status)
- ;;(kill-buffer (process-buffer proc))
- (message "git blame finished"))
-
-(defvar in-blame-filter nil)
-
-(defun git-blame-filter (proc str)
- (save-excursion
- (set-buffer (process-buffer proc))
- (goto-char (process-mark proc))
- (insert-before-markers str)
- (goto-char 0)
- (unless in-blame-filter
- (let ((more t)
- (in-blame-filter t))
- (while more
- (setq more (git-blame-parse)))))))
-
-(defun git-blame-parse ()
- (cond ((looking-at "\\([0-9a-f]\\{40\\}\\) \\([0-9]+\\) \\([0-9]+\\) \\([0-9]+\\)\n")
- (let ((hash (match-string 1))
- (src-line (string-to-number (match-string 2)))
- (res-line (string-to-number (match-string 3)))
- (num-lines (string-to-number (match-string 4))))
- (setq git-blame-current
- (git-blame-new-commit
- hash src-line res-line num-lines)))
- (delete-region (point) (match-end 0))
- t)
- ((looking-at "filename \\(.+\\)\n")
- (let ((filename (match-string 1)))
- (git-blame-add-info "filename" filename))
- (delete-region (point) (match-end 0))
- t)
- ((looking-at "\\([a-z-]+\\) \\(.+\\)\n")
- (let ((key (match-string 1))
- (value (match-string 2)))
- (git-blame-add-info key value))
- (delete-region (point) (match-end 0))
- t)
- ((looking-at "boundary\n")
- (setq git-blame-current nil)
- (delete-region (point) (match-end 0))
- t)
- (t
- nil)))
-
-
-(defun git-blame-new-commit (hash src-line res-line num-lines)
- (save-excursion
- (set-buffer git-blame-file)
- (let ((info (gethash hash git-blame-cache))
- (inhibit-point-motion-hooks t))
- (when (not info)
- (let ((color (pop git-blame-colors)))
- (unless color
- (setq color git-blame-ancient-color))
- (setq info (list hash src-line res-line num-lines
- (cons 'color color))))
- (puthash hash info git-blame-cache))
- (goto-line res-line)
- (while (> num-lines 0)
- (if (get-text-property (point) 'git-blame)
- (forward-line)
- (let* ((start (point))
- (end (progn (forward-line 1) (point)))
- (ovl (make-overlay start end)))
- (push ovl git-blame-overlays)
- (overlay-put ovl 'git-blame info)
- (overlay-put ovl 'help-echo hash)
- (overlay-put ovl 'face (list :background
- (cdr (assq 'color (cddddr info)))))
- ;;(overlay-put ovl 'point-entered
- ;; `(lambda (x y) (git-blame-identify ,hash)))
- (let ((modified (buffer-modified-p)))
- (put-text-property (if (= start 1) start (1- start)) (1- end)
- 'point-entered
- `(lambda (x y) (git-blame-identify ,hash)))
- (set-buffer-modified-p modified))))
- (setq num-lines (1- num-lines))))))
-
-(defun git-blame-add-info (key value)
- (if git-blame-current
- (nconc git-blame-current (list (cons (intern key) value)))))
-
-(defun git-blame-current-commit ()
- (let ((info (get-char-property (point) 'git-blame)))
- (if info
- (car info)
- (error "No commit info"))))
-
-(defun git-blame-identify (&optional hash)
- (interactive)
- (shell-command
- (format "git log -1 --pretty=oneline %s" (or hash
- (git-blame-current-commit)))))
+(error "git-blame.el no longer ships with git. It's recommended
+to replace its use with Emacs's own vc-annotate. See
+contrib/emacs/README in git's
+sources (https://github.com/git/git/blob/master/contrib/emacs/README)
+for more info on suggested alternatives and for why this
+happened.")