Calculate key based on multiple locations

It would be great to have the ability to calculate cache key based on multiple locations. Have a look at my example project: https://github.com/railsconfig/config

- uses: actions/cache@v1
  with:
    path: vendor/bundle
    key: ${{ runner.os }}-gem-${{ hashFiles('**/gemfiles/**') }}-${{ hashFiles('*.gemspec') }}

would be better expressed as:

- uses: actions/cache@v1
  with:
    path: vendor/bundle
    key: ${{ runner.os }}-gem-${{ hashFiles(['**/gemfiles/**', '*.gemspec']) }}

Unfortunately, there is no way to pass an array of files to the hashFiles function.

[joshmgross]

👋 Hi all, this is supported by hashFiles but not documented.

To specify multiple patterns, you can pass a comma separated list:

hashFiles('.config/dotnet-tools.json', '**/packages.lock.json')

I will make sure this is documented.

[joshmgross]

This is now documented: https://docs.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#example-with-multiple-patterns