fix secrets stored in JSON format

scripts/parse.js

@@ -0,0 +1,50 @@
+// const core = require('@actions/core');
+
+try {
+    let inputs = [
+        process.env.JSONSTRING,
+        process.env.JSONSTRINGMULTILINE,
+        process.env.JSONDATA,
+        process.env.SINGLELINE,
+        process.env.MULTILINE,
+    ];
+
+    let names = [
+        "test-json-string",
+        "test-json-string-multiline",
+        "test-json-data",
+        "singleline",
+        "multiline",
+    ];
+
+    let i = 0;
+    inputs.forEach(input => {
+        console.log(`processing: ${names[i]}`)
+        i++;
+        input = (input || '').trim();
+        if (!input) {
+            throw new Error(`Missing service account key JSON (got empty value)`);
+        }
+
+        // If the string doesn't start with a JSON object character, it is probably
+        // base64-encoded.
+        if (!input.startsWith('{')) {
+            let str = input.replace(/-/g, '+').replace(/_/g, '/');
+            while (str.length % 4) str += '=';
+            input = Buffer.from(str, 'base64').toString('utf8');
+        }
+
+        try {
+            const creds = JSON.parse(input);
+            console.log('success!')
+            return creds;
+        } catch (err) {
+            console.log('error parsing')
+            console.log(err)
+        }
+    })
+
+} catch (error) {
+    console.log(error)
+}
+