Add hashFiles to the toolkit

[thisismydesign]

Describe the enhancement

I'm writing an action. Would like to call ${{ hashFiles(...) }} and ${{ runner.OS }} and get the result from within the action. Is this possible? I understand I could have these as inputs, however the purpose of my action is to simplify that process.

Code Snippet

Something along these lines:

index.js

const core = require("@actions/core");

async function run() {
 const hash = core.runExpression('hashFiles(...)')
}

run();

[thisismydesign]

Related to #430 (github.context only exposes a handful of the context though, not what I'm looking for here).

[ericsciple]

You can use the env var RUNNER_OS

The hashFiles source code is here

@joshmgross @TingluoHuang should we add hashFiles to the toolkit?

@thisismydesign today the runner evaluates all expressions. Currently not consumable from javascript action. You can also set an input's default value using an expression. For example actions/checkout uses an expression to set the default repository input.

[thisismydesign]

Thanks! Would be great for my use case to have access to hashFiles.

[joshmgross]

should we add hashFiles to the toolkit?

Absolutely. With @actions/cache now available as an npm package, action authors should have a way to consume hashFiles without requiring user input.

[thisismydesign]

Awesome, that's exactly my use case :)

[ericsciple]

Updated the title.

@thisismydesign as a workaround you can copy the relevant source code from the link i pasted above. It's just that one file, the only dependency is @actions/glob and all other dependencies are from provided by nodejs.

[eine]

Since I'm writing a JS Action, I'm using folder-hash instead of copying hashFiles.ts. Nonetheless, I'd prefer to have the function available in this toolkit.

Ref msys2/setup-msys2#23