From: Romanos Skiadas <rom.skiad@gmail.com>
To: "João Távora" <joaotavora@gmail.com>, emacs-devel@gnu.org
Cc: npostavs@users.sourceforge.net, lele@metapensiero.it,
mvoteiza@udel.edu, monnier@iro.umontreal.ca,
Eli Zaretskii <eliz@gnu.org>,
sdl.web@gmail.com
Subject: Re: New Flymake rewrite in emacs-26
Date: Wed, 11 Oct 2017 18:49:00 +0100 [thread overview]
Message-ID: <43bcb3a1-118e-73fb-17d9-c32a74b829e3@gmail.com> (raw)
In-Reply-To: <87k2017qed.fsf@gmail.com>
Hi,
This looks very interesting. I haven't tried it out yet, but the idea
behind it seems to be very similar to cmake-ide[1]. Would it make sense
to spin this off in its own library instead of making it flymake
specific? This way other packages like company/auto-complete/flycheck
can use it too.
Best,
Romanos
[1][https://github.com/atilaneves/cmake-ide]
On 11/10/17 14:41, João Távora wrote:
> joaotavora@gmail.com (João Távora) writes:
>
>> No, I was aiming for something more generic that includes at least Emacs
>> and perhaps other GNU projects.
> FWIW, here's what I hacked up so far. Seems to work OK in two GNU
> projects: Emacs and Hello (after ./configure, of course).
>
> Probably flawed, but it's a start. Feedback welcome. To test, just load
> this file and M-x flymake-mode in a C file.
>
> Another option, as suggested previously, is to have a special Makefile
> target (that'll need reconfiguring for each project, though).
>
> João
>
> ;;; flymake-gcc.el --- naive gcc Flymake backend -*- lexical-binding: t; -*-
>
> (defvar flymake-gcc-program "gcc"
> "GCC program")
>
> (defun flymake--gcc-heroic-unescape (string)
> (with-temp-buffer
> (let ((error-buffer (current-buffer)))
> (with-temp-buffer
> (cond
> ((zerop
> ;; I suspect "shell-command" makes windows even when called
> ;; from lisp.
> (save-window-excursion
> (shell-command
> (format
> "%s -Q --batch --eval \"%s\" -- %s"
> (expand-file-name invocation-name
> invocation-directory)
> "(mapc 'print (nthcdr 4 command-line-args))"
> string)
> (current-buffer)
> error-buffer)))
> (goto-char (point-min))
> (cl-loop with eof = (make-symbol "eof")
> for form =
> (condition-case _err
> (read (current-buffer))
> (error eof))
> while (not (eq form eof))
> collect form))
> (t
> (with-current-buffer error-buffer
> (error (buffer-string)))))))))
>
> (defvar flymake-gcc-flags 'flymake-gcc-guess-flags
> "A list of flags passed to GCC.
> Alternatively, a symbol naming a function called with no
> arguments that should produce this list of flags, or error if it
> cannot do so.")
>
> (defvar flymake-gcc-extra-flags '("-Wextra" "-Wall")
> "A list of extra flags passed to GCC.")
>
> (defvar-local flymake--gcc-cached-flags nil
> "Internal variable for `flymake-gcc-guess-flags'")
>
> (defun flymake-gcc-guess-flags (&optional trash-cache)
> "Guess GCC flags for compiling current buffer "
> (interactive "P")
> (unless (executable-find "make") (error "Cannot find a suitable make"))
> (when trash-cache (setq flymake--gcc-cached-flags nil))
> (catch 'retval
> (unless (buffer-file-name)
> ;; don't error and don't cache, so that when the buffer is saved
> ;; we get another chance.
> (throw 'retval nil))
> (when-let* ((makefile-dir
> (locate-dominating-file default-directory "Makefile"))
> (makefile (expand-file-name "Makefile" makefile-dir))
> (mtime (file-attribute-modification-time
> (file-attributes makefile))))
> (cond
> ((equal (list makefile mtime)
> (cdr flymake--gcc-cached-flags))
> (when (called-interactively-p 'interactive)
> (message "cached hit for flags for this buffer: %s"
> (car flymake--gcc-cached-flags)))
> (throw 'retval (car flymake--gcc-cached-flags)))
> (t
> (let*
> ((sans-nothing
> (file-name-nondirectory
> (file-name-sans-extension
> (buffer-file-name))))
> (blob (shell-command-to-string
> (format "make -C %s -f %s --just-print %s.o"
> makefile-dir
> makefile
> sans-nothing)))
> (match (string-match
> (format "gcc[[:space:]]+\\(\\(?:-.*\\)*\\)%s"
> sans-nothing)
> blob))
> (flag-string (and match
> (match-string 1 blob)))
> (flags (and flag-string
> (flymake--gcc-heroic-unescape flag-string))))
> (when (or flags (string= "" flag-string))
> (setq flymake--gcc-cached-flags (list flags makefile mtime))
> (when (called-interactively-p 'interactive)
> (message "cached miss for flags for this buffer: %s" flags))
> (throw 'retval flags))))))
> (error "Could not guess gcc flags")))
>
>
> (defvar-local flymake--gcc-proc nil
> "Internal variable for `flymake-gcc'")
>
> (defun flymake-gcc (report-fn &rest _args)
> "Flymake backend for GCC"
> (unless (executable-find flymake-gcc-program)
> (error "Cannot find a suitable gcc"))
> (when (process-live-p flymake--gcc-proc)
> (kill-process flymake--gcc-proc))
> (let ((source (current-buffer)))
> (save-restriction
> (widen)
> (setq flymake--gcc-proc
> (make-process
> :name "gcc-flymake"
> :buffer (generate-new-buffer "*gcc-flymake*")
> :command `(,flymake-gcc-program
> "-fsyntax-only"
> ,@flymake-gcc-extra-flags
> ,@(if (symbolp flymake-gcc-flags)
> (funcall flymake-gcc-flags)
> flymake-gcc-flags)
> "-x" "c" "-")
> :noquery t :connection-type 'pipe
> :sentinel
> (lambda (p _ev)
> (when (eq 'exit (process-status p))
> (unwind-protect
> (when (eq p flymake--gcc-proc)
> (with-current-buffer (process-buffer p)
> (goto-char (point-min))
> (cl-loop
> while (search-forward-regexp
> "^<stdin>:\\([0-9]+\\):\\([0-9]+\\): \\(.*\\): \\(.*\\)$"
> nil t)
> for msg = (match-string 4)
> for (beg . end) =
> (flymake-diag-region
> source
> (string-to-number (match-string 1))
> (string-to-number (match-string 2)))
> for type = (assoc-default
> (match-string 3)
> '(("error" . :error)
> ("note" . :note)
> ("warning" . :warning))
> #'string-match)
> collect (flymake-make-diagnostic source beg end type msg)
> into diags
> finally (funcall report-fn diags))))
> ;; (display-buffer (process-buffer p)) ; use this instead of the next one for debug
> (kill-buffer (process-buffer p))
> ))
> )))
> (process-send-region flymake--gcc-proc (point-min) (point-max))
> (process-send-eof flymake--gcc-proc))))
>
> (defun flymake--setup-gcc-flymake ()
> (add-hook 'flymake-diagnostic-functions 'flymake-gcc nil t))
>
> (add-hook 'c-mode-hook 'flymake--setup-gcc-flymake)
>
> ;;; flymake-gcc.el ends here
>
>
>
next prev parent reply other threads:[~2017-10-11 17:49 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-03 14:05 New Flymake rewrite in emacs-26 João Távora
2017-10-03 15:00 ` Eli Zaretskii
2017-10-04 11:58 ` Lele Gaifax
2017-10-04 13:41 ` Lele Gaifax
2017-10-04 16:08 ` João Távora
2017-10-04 16:42 ` Lele Gaifax
2017-10-04 18:11 ` Lele Gaifax
2017-10-05 2:21 ` João Távora
2017-10-05 11:42 ` Lele Gaifax
2017-10-05 23:32 ` Noam Postavsky
2017-10-06 13:16 ` João Távora
2017-10-06 13:24 ` Noam Postavsky
2017-10-06 15:48 ` João Távora
2017-10-07 7:37 ` Lele Gaifax
2017-10-07 16:08 ` João Távora
2017-10-10 12:25 ` João Távora
2017-10-10 14:18 ` Eli Zaretskii
2017-10-10 15:09 ` João Távora
2017-10-10 15:53 ` Eli Zaretskii
2017-10-10 16:25 ` João Távora
2017-10-10 16:40 ` Eli Zaretskii
2017-10-10 17:03 ` João Távora
2017-10-10 17:20 ` Noam Postavsky
2017-10-11 0:07 ` João Távora
2017-10-11 0:59 ` Noam Postavsky
2017-10-11 10:39 ` Eli Zaretskii
2017-10-11 12:16 ` Noam Postavsky
2017-10-11 12:25 ` João Távora
2017-10-11 10:24 ` Eli Zaretskii
2017-10-11 12:01 ` João Távora
2017-10-11 12:13 ` Eli Zaretskii
2017-10-11 13:41 ` João Távora
2017-10-11 17:49 ` Romanos Skiadas [this message]
2017-10-11 18:39 ` guillaume papin
2017-10-12 13:17 ` João Távora
2017-10-11 20:25 ` Stefan Monnier
2017-10-12 13:10 ` João Távora
2017-10-12 13:43 ` Stefan Monnier
2017-10-12 13:56 ` João Távora
2017-10-11 13:11 ` Mark Oteiza
2017-10-10 17:23 ` Eli Zaretskii
2017-10-11 11:11 ` Lele Gaifax
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