Add support for v8-canary, nightly and rc (#655)

src/util.ts

@@ -0,0 +1,63 @@
+import * as core from '@actions/core';
+import * as exec from '@actions/exec';
+
+export function parseNodeVersionFile(contents: string): string {
+  let nodeVersion: string | undefined;
+
+  // Try parsing the file as an NPM `package.json` file.
+  try {
+    nodeVersion = JSON.parse(contents).volta?.node;
+    if (!nodeVersion) nodeVersion = JSON.parse(contents).engines?.node;
+  } catch {
+    core.info('Node version file is not JSON file');
+  }
+
+  if (!nodeVersion) {
+    const found = contents.match(/^(?:nodejs\s+)?v?(?<version>[^\s]+)$/m);
+    nodeVersion = found?.groups?.version;
+  }
+
+  // In the case of an unknown format,
+  // return as is and evaluate the version separately.
+  if (!nodeVersion) nodeVersion = contents.trim();
+
+  return nodeVersion as string;
+}
+
+export async function printEnvDetailsAndSetOutput() {
+  core.startGroup('Environment details');
+
+  const promises = ['node', 'npm', 'yarn'].map(async tool => {
+    const output = await getToolVersion(tool, ['--version']);
+
+    return {tool, output};
+  });
+
+  const tools = await Promise.all(promises);
+  tools.forEach(({tool, output}) => {
+    if (tool === 'node') {
+      core.setOutput(`${tool}-version`, output);
+    }
+    core.info(`${tool}: ${output}`);
+  });
+
+  core.endGroup();
+}
+
+async function getToolVersion(tool: string, options: string[]) {
+  try {
+    const {stdout, stderr, exitCode} = await exec.getExecOutput(tool, options, {
+      ignoreReturnCode: true,
+      silent: true
+    });
+
+    if (exitCode > 0) {
+      core.info(`[warning]${stderr}`);
+      return '';
+    }
+
+    return stdout.trim();
+  } catch (err) {
+    return '';
+  }
+}