Unused variables or arguments can indicate bugs, but they can also
help document the code, in particular in case of signal handlers
and destructuring.
Account for this by keeping the error, but set up patterns that allow
us to opt out of if for individual variables/arguments. For arguments
we pick a '_' prefix, while for variables we go with a suffix instead,
to not accidentally exempt private module-scope variables.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/627
While all javascript functions have a return value - either an explicit
one from a return statement, or an implicit "undefined" - mixing both in
the same function is almost certainly an oversight, and more often than
not a bug.
Enable the corresponding eslint rule to catch those errors.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/635
Regarding coding style, gjs is moving in a direction that departs quite
significantly from the established style, in particular when indenting
multi-line array/object literals or method arguments:
Currently we are keeping those elements aligned, while the gjs rules now
expect them to use the regular 4-space indentation.
There are certainly good arguments that can be made for that move - it's
much less prone to leading to overly-long lines, and matches popluar JS
styles elsewhere. But switching coding style implies large diffs which
interfere with git-blame and friends, so in order to allow for a more
gradual change, add a separate set of "legacy" rules that match more
closely the style we would expect up to now.
It also disables the rules for quotes and template strings - the former
because we cannot match the current style to use double-quotes for
translatable strings and single-quotes otherwise, the latter because
template strings are still relatively new, so we haven't adopted them
yet.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/609
All variables should be in camelCase, so configure the corresponding
rule to enforce this. Exempt properties for now, to accommodate the
existing practice of using C-style underscore names for construct
properties of introspected objects.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/609
We replaced all Lang.bind() calls with arrow functions or the standardized
Function.prototype.bind(), at least for the former eslint has some options
to ensure that the old custom doesn't sneak back in.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/609
gjs doesn't include any gettext wrappers, and obviously can't know
about the shell's global object, so include those in the list of
globals for all sources in the gnome-shell context.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/609
gjs started to run eslint during its CI a while ago, so there is an
existing rules set we can use as a starting point for our own setup.
As we will adapt those rules to our code base, we don't want those
changes to make it harder to synchronize the copy with future gjs
changes, so include the rules from a separate file rather than using
the configuration directly.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/609
