build: inline external Github Actions to unblock CI (#12241)

* build: inline cached-dependencies to unblock CI

* Run E2E on pull_request on;y

* Inline all external actions

* Checkout needed for internal actions

Also fixes pre-commit

* Add missing files

.github/actions/cached-dependencies/src/setup.ts

@@ -0,0 +1,66 @@
+/**
+ * Load inputs and execute.
+ */
+import * as core from '@actions/core';
+import { exec } from '@actions/exec';
+import path from 'path';
+import fs from 'fs';
+import { DefaultInputs, InputName } from './constants';
+import { getInput } from './utils/inputs';
+
+const SHARED_BASHLIB = path.resolve(__dirname, '../src/scripts/bashlib.sh');
+
+/**
+ * Run bash commands with predefined lib functions.
+ *
+ * @param {string} cmd - The bash commands to execute.
+ */
+export async function runCommand(
+  cmd: string,
+  extraBashlib: string,
+): Promise<void> {
+  const bashlibCommands = [`source ${SHARED_BASHLIB}`];
+  if (extraBashlib) {
+    bashlibCommands.push(`source ${extraBashlib}`);
+  }
+  try {
+    await exec('bash', ['-c', [...bashlibCommands, cmd].join('\n     ')]);
+  } catch (error) {
+    core.setFailed(error.message);
+    process.exit(1);
+  }
+}
+
+export async function run(): Promise<void> {
+  let bashlib = getInput(InputName.Bashlib);
+  const rawCommands = getInput(InputName.Run);
+  const runInParallel = getInput(InputName.Parallel);
+
+  if (!fs.existsSync(bashlib)) {
+    if (bashlib !== DefaultInputs[InputName.Bashlib]) {
+      core.error(`Custom bashlib "${bashlib}" does not exist.`);
+    }
+    // don't add bashlib to runCommand
+    bashlib = '';
+  }
+
+  if (runInParallel) {
+    // Attempt to split by two or more new lines first, if there is still only
+    // one command, attempt to split by one new line. This is because users
+    // asked for parallelization, so we make our best efforts to get multiple
+    // commands.
+    let commands = rawCommands.split(/\n{2,}/);
+    if (commands.length === 1) {
+      commands = rawCommands.split('\n');
+    }
+    core.debug(`>> Run ${commands.length} commands in parallel...`);
+    await Promise.all(
+      commands
+        .map(x => x.trim())
+        .filter(x => !!x)
+        .map(cmd => exports.runCommand(cmd, bashlib)),
+    );
+  } else if (rawCommands) {
+    await exports.runCommand(rawCommands, bashlib);
+  }
+}