diff options
Diffstat (limited to 'lib/tools/emacs')
-rw-r--r-- | lib/tools/emacs/erlang-flymake.el | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/lib/tools/emacs/erlang-flymake.el b/lib/tools/emacs/erlang-flymake.el new file mode 100644 index 0000000000..a6284a25bc --- /dev/null +++ b/lib/tools/emacs/erlang-flymake.el @@ -0,0 +1,94 @@ +;; erlang-flymake.el +;; +;; Syntax check erlang source code on the fly (integrates with flymake). +;; +;; Start using flymake with erlang by putting the following somewhere +;; in your .emacs file: +;; +;; (require 'erlang-flymake) +;; +;; Flymake is rather eager and does its syntax checks frequently by +;; default and if you are bothered by this, you might want to put the +;; following in your .emacs as well: +;; +;; (erlang-flymake-only-on-save) +;; +;; There are a couple of variables which control the compilation options: +;; * erlang-flymake-get-code-path-dirs-function +;; * erlang-flymake-get-include-dirs-function +;; * erlang-flymake-extra-opts +;; +;; This code is inspired by http://www.emacswiki.org/emacs/FlymakeErlang. + +(require 'flymake) +(eval-when-compile + (require 'cl)) + +(defvar erlang-flymake-get-code-path-dirs-function + 'erlang-flymake-get-code-path-dirs + "Return a list of ebin directories to add to the code path.") + +(defvar erlang-flymake-get-include-dirs-function + 'erlang-flymake-get-include-dirs + "Return a list of include directories to add to the compiler options.") + +(defvar erlang-flymake-extra-opts + (list "+warn_obsolete_guard" + "+warn_unused_import" + "+warn_shadow_vars" + "+warn_export_vars" + "+strong_validation" + "+report") + "A list of options that will be passed to the compiler") + +(defun erlang-flymake-only-on-save () + "Trigger flymake only when the buffer is saved (disables syntax +check on newline and when there are no changes)." + (interactive) + ;; There doesn't seem to be a way of disabling this; set to the + ;; largest int available as a workaround (most-positive-fixnum + ;; equates to 8.5 years on my machine, so it ought to be enough ;-) ) + (setq flymake-no-changes-timeout most-positive-fixnum) + (setq flymake-start-syntax-check-on-newline nil)) + + +(defun erlang-flymake-get-code-path-dirs () + ()) + +(defun erlang-flymake-get-include-dirs () + ()) + +(defun erlang-flymake-init () + (let* ((temp-file + (flet ((flymake-get-temp-dir () (erlang-flymake-temp-dir))) + (flymake-init-create-temp-buffer-copy + 'flymake-create-temp-with-folder-structure))) + (code-dir-opts + (erlang-flymake-flatten + (mapcar (lambda (dir) (list "-pa" dir)) + (funcall erlang-flymake-get-code-path-dirs-function)))) + (inc-dir-opts + (erlang-flymake-flatten + (mapcar (lambda (dir) (list "-I" dir)) + (funcall erlang-flymake-get-include-dirs-function)))) + (compile-opts + (append inc-dir-opts + code-dir-opts + erlang-flymake-extra-opts))) + (list "erlc" (append compile-opts (list temp-file))))) + +(defun erlang-flymake-temp-dir () + ;; Squeeze the user's name in there in order to make sure that files + ;; for two users who are working on the same computer (like a linux + ;; box) don't collide + (format "%s/flymake-%s" temporary-file-directory user-login-name)) + +(defun erlang-flymake-flatten (list) + (apply #'append list)) + +(add-to-list 'flymake-allowed-file-name-masks + '("\\.erl\\'" erlang-flymake-init)) +(add-hook 'erlang-mode-hook 'flymake-mode) + +(provide 'erlang-flymake) +;; erlang-flymake ends here |