node-sass will watch "css" files in directory mode

[hangoocn]

Say I have test.css, then in same directory, I run
node-sass -w ./ -o ./ (Watch files in directory)
It will watch changes in test.css and this only happens in watch mode.

But non-watch mode node-sass ./ -o ./ will give No input file was found. , which is as expected.

That is to say, node-sass will also watch all generated css files from sass/scss files in directory mode.

Is this a bug or by design?

• NPM version (npm -v): 6.9.0
• Node version (node -v): v10.15.0
• Node Process (node -p process.versions):
  { http_parser: '2.8.0',
  node: '10.15.0',
  v8: '6.8.275.32-node.45',
  uv: '1.23.2',
  zlib: '1.2.11',
  ares: '1.15.0',
  modules: '64',
  nghttp2: '1.34.0',
  napi: '3',
  openssl: '1.1.0j',
  icu: '62.1',
  unicode: '11.0',
  cldr: '33.1',
  tz: '2018e' }
• Node Platform (node -p process.platform):win32
• Node architecture (node -p process.arch):x64
• node-sass version (node -p "require('node-sass').info"): Cannot find module 'node-sass'
• npm node-sass versions (npm ls node-sass): 4.11.0

[saper]

There is a need for a breaking change for that, you may follow #2111 for details

See sass/libsass#2611
See #2184
See #2006
See #1933
See #1925
See #1867
See #1845