Add output_text_description_file input (#24)

* Add action input for output_text_description_file

* Actually apply file content to text_description

README.md

@@ -84,6 +84,12 @@ Supports the following properties:
 
 See [Check Runs API](https://developer.github.com/v3/checks/runs/#output-object) for more information
 
+### `output_text_description_file`
+
+_Optional_ Path to a file containing text which should be set as the `text_description` property of `output`'. Can contain plain text or markdown.
+
+Note that this will be ignored if `output` is not provided. When `output` is provided with a text_description, this input will take precedence and override it.
+
 ### `annotations`
 
 _Optional_ A JSON array (as a string) containing the annotations of your check, requires `output` to be included.

action.yml

@@ -36,6 +36,9 @@ inputs:
   output:
     description: 'the output of your check'
     required: false
+  output_text_description_file:
+    description: 'path to a file containing text which should be set as the `text_description` of `output`'
+    required: false
   annotations:
     description: 'the annotations of your check'
     required: false

src/inputs.ts

@@ -1,5 +1,6 @@
 import {InputOptions} from '@actions/core';
 import * as Inputs from './namespaces/Inputs';
+import fs from 'fs';
 
 type GetInput = (name: string, options?: InputOptions | undefined) => string;
 
@@ -20,6 +21,7 @@ export const parseInputs = (getInput: GetInput): Inputs.Args => {
   const repo = getInput('repo');
   const sha = getInput('sha');
   const token = getInput('token', {required: true});
+  const output_text_description_file = getInput('output_text_description_file');
 
   const name = getInput('name');
   const checkIDStr = getInput('check_id');
@@ -74,6 +76,10 @@ export const parseInputs = (getInput: GetInput): Inputs.Args => {
     throw new Error(`missing value for 'action_url'`);
   }
 
+  if (output && output_text_description_file) {
+    output.text_description = fs.readFileSync(output_text_description_file, 'utf8');
+  }
+
   if ((!output || !output.summary) && (annotations || images)) {
     throw new Error(`missing value for 'output.summary'`);
   }