Refactor action to typescript (#226)

* Refactor to typescript (config part)

* Refactor to typescript (convert extensions, minor fixes)

* Refactor to typescript (move from `action` to `dist`)

* Re-enable integrity-check for dist index.js

* Fix all tests and lints

* fix parsing major versions

* Test patch level to be digits only

* debug

* debug

* uncache

* manual compile

* debug

* debug

* Debug

* Build lib - doh

* remove diff check

* Make kubernetes workflow manual

* Properly generate 3 digit for simple major tags

* Remove ts-ignore

* re-enable cache

src/model/system.ts

@@ -0,0 +1,62 @@
+import * as core from '@actions/core';
+import { exec } from '@actions/exec';
+
+class System {
+  static async run(command, arguments_: any = [], options = {}) {
+    let result = '';
+    let error = '';
+    let debug = '';
+
+    const listeners = {
+      stdout: (dataBuffer) => {
+        result += dataBuffer.toString();
+      },
+      stderr: (dataBuffer) => {
+        error += dataBuffer.toString();
+      },
+      debug: (dataString) => {
+        debug += dataString.toString();
+      },
+    };
+
+    const showOutput = () => {
+      if (debug !== '') {
+        core.debug(debug);
+      }
+
+      if (result !== '') {
+        core.info(result);
+      }
+
+      if (error !== '') {
+        core.warning(error);
+      }
+    };
+
+    const throwContextualError = (message) => {
+      let commandAsString = command;
+      if (Array.isArray(arguments_)) {
+        commandAsString += ` ${arguments_.join(' ')}`;
+      } else if (typeof arguments_ === 'string') {
+        commandAsString += ` ${arguments_}`;
+      }
+
+      throw new Error(`Failed to run "${commandAsString}".\n ${message}`);
+    };
+
+    try {
+      const exitCode = await exec(command, arguments_, { silent: true, listeners, ...options });
+      showOutput();
+      if (exitCode !== 0) {
+        throwContextualError(`Command returned non-zero exit code.\nError: ${error}`);
+      }
+    } catch (inCommandError) {
+      showOutput();
+      throwContextualError(`In-command error caught: ${inCommandError}`);
+    }
+
+    return result;
+  }
+}
+
+export default System;