tahoe-lafs/misc/coding_tools/coverage.el

122 lines
4.5 KiB
EmacsLisp

(defvar coverage-annotation-file ".coverage.el")
(defvar coverage-annotations nil)
(defun find-coverage-annotation-file ()
(let ((dir (file-name-directory buffer-file-name))
(olddir "/"))
(while (and (not (equal dir olddir))
(not (file-regular-p (concat dir coverage-annotation-file))))
(setq olddir dir
dir (file-name-directory (directory-file-name dir))))
(and (not (equal dir olddir)) (concat dir coverage-annotation-file))
))
(defun load-coverage-annotations ()
(let* ((annotation-file (find-coverage-annotation-file))
(coverage
(with-temp-buffer
(insert-file-contents annotation-file)
(let ((form (read (current-buffer))))
(eval form)))))
(setq coverage-annotations coverage)
coverage
))
(defun coverage-unannotate ()
(save-excursion
(dolist (ov (overlays-in (point-min) (point-max)))
(delete-overlay ov))
(setq coverage-this-buffer-is-annotated nil)
(message "Removed annotations")
))
;; in emacs22, it will be possible to put the annotations in the fringe. Set
;; a display property for one of the characters in the line, using
;; (right-fringe BITMAP FACE), where BITMAP should probably be right-triangle
;; or so, and FACE should probably be '(:foreground "red"). We can also
;; create new bitmaps, with faces. To do tartans will require a lot of
;; bitmaps, and you've only got about 8 pixels to work with.
;; unfortunately emacs21 gives us less control over the fringe. We can use
;; overlays to put letters on the left or right margins (in the text area,
;; overriding actual program text), and to modify the text being displayed
;; (by changing its background color, or adding a box around each word).
(defun coverage-annotate (show-code)
(let ((allcoverage (load-coverage-annotations))
(filename-key (expand-file-name buffer-file-truename))
thiscoverage code-lines covered-lines uncovered-code-lines
)
(while (and (not (gethash filename-key allcoverage nil))
(string-match "/" filename-key))
;; eat everything up to and including the first slash, then look again
(setq filename-key (substring filename-key
(+ 1 (string-match "/" filename-key)))))
(setq thiscoverage (gethash filename-key allcoverage nil))
(if thiscoverage
(progn
(setq coverage-this-buffer-is-annotated t)
(setq code-lines (nth 0 thiscoverage)
covered-lines (nth 1 thiscoverage)
uncovered-code-lines (nth 2 thiscoverage)
)
(save-excursion
(dolist (ov (overlays-in (point-min) (point-max)))
(delete-overlay ov))
(if show-code
(dolist (line code-lines)
(goto-line line)
;;(add-text-properties (point) (line-end-position) '(face bold) )
(overlay-put (make-overlay (point) (line-end-position))
;'before-string "C"
;'face '(background-color . "green")
'face '(:background "dark green")
)
))
(dolist (line uncovered-code-lines)
(goto-line line)
(overlay-put (make-overlay (point) (line-end-position))
;'before-string "D"
;'face '(:background "blue")
;'face '(:underline "blue")
'face '(:box "red")
)
)
(message (format "Added annotations: %d uncovered lines"
(safe-length uncovered-code-lines)))
)
)
(message "unable to find coverage for this file"))
))
(defun coverage-toggle-annotations (show-code)
(interactive "P")
(if coverage-this-buffer-is-annotated
(coverage-unannotate)
(coverage-annotate show-code))
)
(setq coverage-this-buffer-is-annotated nil)
(make-variable-buffer-local 'coverage-this-buffer-is-annotated)
(define-minor-mode coverage-annotation-minor-mode
"Minor mode to annotate code-coverage information"
nil
" CA"
'(
("\C-c\C-a" . coverage-toggle-annotations)
)
() ; forms run on mode entry/exit
)
(defun maybe-enable-coverage-mode ()
(if (string-match "/src/allmydata/" (buffer-file-name))
(coverage-annotation-minor-mode t)
))
(add-hook 'python-mode-hook 'maybe-enable-coverage-mode)