--format=compact outputs newlines before and after, this causes problems for editor integration (emacs)

[cillianderoiste]

csslint works with emacs flymake mode if you strip the newlines from the output. Here's a sample configuration with the relevant matches:

(defun flymake-css-init ()
  (let* ((temp-file (flymake-init-create-temp-buffer-copy
             'flymake-create-temp-inplace))
     (local-file (file-relative-name
              temp-file
              (file-name-directory buffer-file-name))))

    ;; "ecsslint.sh" is a shell script, see below 
    (list "ecsslint.sh" (list temp-file))))

(add-to-list 'flymake-allowed-file-name-masks
         '("\\.css$" flymake-css-init))

;; The regexp for matching errors in the lint output
(add-to-list 'flymake-err-line-patterns
         '("^\\(\.+\.css\\): line \\([0-9]+\\), col \\([0-9]+\\), \\(.*\\)"
           1 2 3 4))

ecsslint.sh just contains:

#!/bin/sh
csslint --format=compact $1 | grep .

(grep . will return any line that has some characters, removing the empty lines)

I don't know enough emacs lisp to come up with a clever way to do this without the shell script, but perhaps this will also affect other editors.

I did have a look at the code (only 0.5.0, I couldn't figure out how to run the code from HEAD, does it require some kind of build tool?). I can see that startFormat and endFormat are both "", and they are printed. This produces one newline before and after the output. I couldn't figure out why there is also an additional newline at the very end.

There is one other tiny problem when providing full paths as the filename argument, I'll open a different ticket for that.

[cillianderoiste]

I've realised I need ant to generate the build and confirmed that this is still relevant for HEAD.