Does ruby allow you to treat warnings as errors?
One reason I'd like to do this is to ensure that if heckle removing a line of code means that a warning occurs, I have the option of ensuring that the mutant get killed.
Does ruby allow you to treat warnings as errors?
One reason I'd like to do this is to ensure that if heckle removing a line of code means that a warning occurs, I have the option of ensuring that the mutant get killed.
There is unfortunately no real way of doing this, at least not on most versions of Ruby out there (variations may exist), short of monitoring the program output and aborting it when a warning appears on standard error. Here's why:
Kernel.warn
, which you can redefine to do whatever you wish (including exiting), and which you'd expect (hope) to be used consistently by Ruby to report warnings (including internal e.g. parsing warning), butrb_warn
from source/server.c
, completely bypassing your redefinition of Kernel.warn
(e.g. the "string literal in condition
" warning, for example, issued when doing something like: do_something if 'string'
, is printed via the native rb_warn
from source/parse.c
)rb_warning
native method, which can be used by Ruby to log warnings if -w
or -v
is specified.So, if you need to take action solely on warnings generated by your application code's calling Kernel.warn
then simply redefine Kernel.warn
. Otherwise, you have exactly two options:
source/error.c
to exit in rb_warn
and rb_warning
(and rb_warn_m
?), and rebuild Ruby: warning:
', and abort it on matchCheers, V.
You could also potentially use DTrace, and intercept the calls to rb_warn
and rb_warning
, though that's not going to produce exceptions you can rescue from somewhere. Rather, it'll just put them somewhere you can easily log them.