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Local variables and mode hooks
From: |
Lele Gaifax |
Subject: |
Local variables and mode hooks |
Date: |
Sat, 18 Jul 2015 13:32:24 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5.50 (gnu/linux) |
Hi all,
I'm trying to understand how can workaround a problem I'm facing when using
"local variables" I set in a `.dir-locals.el` file.
The problem is that the values are apparently assigned *after* the mode's hook
is run, so they are either "ignored" when I visit the source file, or
"considered" only when I actually modify it.
Let me try to explain.
In my Python sources, using Emacs python.el mode python-mode-hook, I usually
enable both `whitespace-mode` to highlight lines longer than `fill-column` (I
set `whitespace-line-column` to nil) and `flymake-python-pyflakes-load` to
check their syntax with pyflakes.
In a particular project I'm using Python 3, and I want to have a different
`fill-column` to make my coworkers happy, so I created a top level
`.dir-locals.el` file containing
((nil . ((fill-column . 75)))
(python-mode . ((flymake-python-pyflakes-executable . "python3")
(flymake-python-pyflakes-extra-arguments . ("-m"
"pyflakes")))))
When I visit/create a Python source, its local settings are changed
accordingly, but
a) whitespace highlights lines longer than the *global* value of
`fill-column`, not its local setting
b) flymake shows syntax errors, because the "initial run" of pyflakes has been
done with the standard settings, i.e. with its Python 2 variant
To make effect a) disappear I must execute M-: (whitespace-color-on), so it
"reinstall" its font-lock customization, while effect b) goes away as soon as
I change the buffer, triggering a new execution of pyflakes.
Is there some hook that I can use that runs *after* the major mode hooks *and*
the local variables settings got applied, so that I can force whitespace
refresh and trigger a flymake check?
Thanks in advance for any hint,
ciao, lele.
--
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it | -- Fortunato Depero, 1929.
- Local variables and mode hooks,
Lele Gaifax <=