How to get all inputs from an GH action without knowing input names?

jzavgok · October 20, 2021, 8:35pm

Is it possible to receive all inputs (in JavaScript Action) out of the GitHub action?
I understand this is possible to do when all inputs are predefined and input names are known, you just use 'core.getInput(“input-name”). What I am looking for is something along the lines of core.getAllInputs(), with an array as a result.
Or at least something like core.getAllInputNames(), with an array of all input names, so I can loop over that and get each individual input.

Simran-B · October 24, 2021, 7:37pm

What core.getInput() does is take the provided string, substitute spaces with underscores, convert to uppercase, prepend INPUT_, and then use this string to look up an environment variable:

github.com

actions/toolkit/blob/e2eeb0a784f4067a75f0c6cd2cc9703f3cbc7744/packages/core/src/core.ts#L130

    
      
          * Gets the value of an input.
          * Unless trimWhitespace is set to false in InputOptions, the value is also trimmed.
          * Returns an empty string if the value is not defined.
          *
          * @param     name     name of the input to get
          * @param     options  optional. See InputOptions.
          * @returns   string
          */
          export function getInput(name: string, options?: InputOptions): string {
           const val: string =
             process.env[`INPUT_${name.replace(/ /g, '_').toUpperCase()}`] || ''
           if (options && options.required && !val) {
             throw new Error(`Input required and not supplied: ${name}`)
           }
          
          
 if (options && options.trimWhitespace === false) {
             return val
           }
          
          
 return val.trim()
          }

Therefore, you should be able to determine all input names by filtering the environment variables:

let inputs = Object.keys(process.env).filter(e => e.startsWith('INPUT_'))

Or for an object of inputs:

let inputs = {}
for (let [k,v] of Object.entries(process.env)) {
  if (k.startsWith('INPUT_')) {
    inputs[k] = v;
  }
}