Cache-loader is used as an item in the use member so the correct
type should be RuleSetUseItem not RuleSetRule.
See: DefinitelyTyped/DefinitelyTyped/webpack/index.d.ts#L498
Profiling shows that using cache-loader saves ~6-7 seconds of time take
by webpack-dev-server on subsequent runs. The overhaul this adds when
nothing is cached (when running first time) is around 1-2 seconds. We don't
use cache loader for ts-loader since webpack docs says it will slow it down
and file-loader since it just copies files over and caching it would just
was disk space.
This is the second merge of this commit. It fixes the issue with the
previous one by placingn cache-loader after mini-css-loader because it
just extracts css and caching that will make file-loader not run which
in turn makes developement enviorment break.
Profiling shows that using cache-loader saves ~6-7 seconds of time take
by webpack-dev-server on subsequent runs. The overhaul this adds when
nothing is cached (when running first time) is around 1-2 seconds. We don't
use cache loader for ts-loader since webpack docs says it will slow it down
and file-loader since it just copies files over and caching it would just
was disk space.
Profiling data:
-------- Master ---------
~/zulip (master) $ tools/webpack --watch | ts -s '%.S' # master
03.995825 ℹ ｢wds｣: Project is running at http://127.0.0.1:9994/
03.996161 ℹ ｢wds｣: webpack output is served from /webpack/
03.996289 ℹ ｢wds｣: Content not from webpack is served from ...
19.284477 ℹ ｢wdm｣:
19.285371 ℹ ｢wdm｣: Compiled successfully.
-------- cache-loader ---------
~/zulip (cache-loader)$ tools/webpack --watch | ts -s '%.S'
04.107913 ℹ ｢wds｣: Project is running at http://127.0.0.1:9994/
04.108646 ℹ ｢wds｣: webpack output is served from /webpack/
04.109068 ℹ ｢wds｣: Content not from webpack is served from ...
12.633782 ℹ ｢wdm｣:
12.634083 ℹ ｢wdm｣: Compiled successfully.
Before we used to defined our own type Loader which was
partly incorrect because the use property can only
be string which is incorrect. We use the RuleSetRule type
provided by webpack instead.
This commit moves all files previously under the 'app' bundle in
the Django pipeline to being compiled by webpack under the 'app'
entry point. In the process, it moves assets under the app entry
to a file called app.js that consumes all relevant css and js files.
This commit also edits the webpack config to be able to expose certain
variables for third party libraries that are currently required by
some modules. This is bad coding form and should be refactored to
requiring whatever dependencies a module may have; we're just
deferring that to the future to simplify the series of transitions we
need to do here. The variable exposure is done using expose-loader in
webpack.
The app/index.html template is edited to override the newly introduced
'commonjs' block in the base template. This is done as a temporary
measure so as not to disrupt other pages on the app during the transition.
It also fixes the value of the 'this' context that was being inferred
as window by third party libraries. This is done using imports-loader
in the webpack config. This is also messy and probably isn't how we
want things to work long term.
Thomas Ip
Priyank Patel
Tim Abbott
Armaan Ahluwalia