feat: add outputs

re #96

src/util.ts

@@ -0,0 +1,42 @@
+import core from '@actions/core'
+
+export type Input =
+  | 'add'
+  | 'author_name'
+  | 'author_email'
+  | 'branch'
+  | 'cwd'
+  | 'message'
+  | 'pull_strategy'
+  | 'push'
+  | 'remove'
+  | 'signoff'
+  | 'tag'
+
+export const outputs = {
+  committed: 'false',
+  pushed: 'false',
+  tagged: 'false'
+}
+export type Output = keyof typeof outputs
+
+export function getInput(name: Input) {
+  return core.getInput(name)
+}
+
+export function log(err: any | Error, data?: any) {
+  if (data) console.log(data)
+  if (err) core.error(err)
+}
+
+export function parseBool(value: any) {
+  try {
+    const parsed = JSON.parse(value)
+    if (typeof parsed == 'boolean') return parsed
+  } catch {}
+}
+
+export function setOutput(name: Output, value: 'true' | 'false') {
+  core.setOutput(name, value)
+}
+for (const key in outputs) setOutput(key as Output, outputs[key])