update makeprg builder:
* it now accepts `fname`, `tail`, and `post_args` params.
* add some doc above syntastic#makeprg#build
* update a bunch of checkers to use the new params
Still have quite a few checkers that arent using makeprg#build.
Including all c* and a few other c-like checkers. And PHP.
Not to worried about c* as these checkers are complicated and probably
justify having their own logic to build makeprgs.
The problem
---
Some people want to change the syntax checker args and/or executable.
Currently they have to create their own checker to do this.
Solution
---
Create a standard API for building a makeprg that allows users to set
global variables to override the exe or args.
This API is in use in the coffee and python/flake8 checkers - as
proofs of concept.
So, if the user wanted to change the args that get passed to `flake8`
they can now set `let g:syntastic_python_flake8_args="--foo --bar"` in
their vimrc. Similarly they could set `let
g:syntastic_python_flake8_exe='python foo.py'`
If the shebang contains -T, then the makeprg looks like:
perl '/path/to/efm_perl.pl' -c -w '/tmp/foo.pl' -Tc
Mods to syntastic#util#ParseMagicNumber
* rename it to ParseShebang (since this name seems more common)
* return an empty result set rather than 0 so callers dont have to
check if empty()
Previously we were blowing away highlights that were added by other
plugins via matchadd(). To prevent this we now track all the ids of the
highlights groups we add and remove them explicitly with matchdelete().
Normally if location item has "col" item, syntastic#HighlightErrors() handle it without callback
call for performance reason. But sometimes it's necessary to handle all items with callback
(like in new vala syntax checker), so third optional bool arg is added to the function.
If this argument exists and has true value, then callback function is called on *all*
location items, no matter is they have "col" element or not.
