Anders Kaseorg 43c8c720ef node_cache: Run yarn with --ignore-scripts. ...

As predicted in https://www.kb.cert.org/vuls/id/319816/, a malicious
worm is beginning to spread across the npm ecosystem through package
postinstall scripts.  Only instead of direct self-replicating code,
the replication vector is the temptation to monetize postinstall
scripts by polluting the console logs with paid advertisements.  The
effect will be the same unless we all put a stop to this while we
still can.

Apply the recommended VU#319816 workaround, which is to disable
lifecycle scripts when installing npm packages.  The only fallout is:

* node-sass can’t run because it uses compiled native code; we replace
  it with Dart Sass.
* phantomjs-prebuilt doesn’t download the binary at install time; we
  tell it to download it in run-casper.
* ttf2woff2 transparently falls back from native code to an Emscripten
  build.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

2019-08-26 14:36:03 -07:00

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