initial commit of action

index.js

@@ -0,0 +1,19 @@
+const core = require('@actions/core');
+const github = require('@actions/github');
+const toml = require('toml');
+const fs = require('fs');
+
+try {
+  const file = core.getInput('file');
+  const field = core.getInput('field');
+  var fields = field.split('.');
+  var str = fs.readFileSync(file);
+  var parsed = toml.parse(str);
+  var value = parsed;
+  fields.forEach(function (f) {
+    value = value[f];
+  });
+  core.setOutput("value", value);
+} catch (error) {
+  core.setFailed(error.message);
+}