setup-python/src/install-python.ts

import * as path from 'path';
import * as core from '@actions/core';
import * as tc from '@actions/tool-cache';
import * as exec from '@actions/exec';
import {ExecOptions} from '@actions/exec/lib/interfaces';
import {stderr} from 'process';

const TOKEN = core.getInput('token');
const AUTH = !TOKEN || isGhes() ? undefined : `token ${TOKEN}`;
const MANIFEST_REPO_OWNER = 'actions';
const MANIFEST_REPO_NAME = 'python-versions';
const MANIFEST_REPO_BRANCH = 'main';
export const MANIFEST_URL = `https://raw.githubusercontent.com/${MANIFEST_REPO_OWNER}/${MANIFEST_REPO_NAME}/${MANIFEST_REPO_BRANCH}/versions-manifest.json`;

const IS_WINDOWS = process.platform === 'win32';
const IS_LINUX = process.platform === 'linux';

export async function findReleaseFromManifest(
  semanticVersionSpec: string,
  architecture: string
): Promise<tc.IToolRelease | undefined> {
  const manifest: tc.IToolRelease[] = await tc.getManifestFromRepo(
    MANIFEST_REPO_OWNER,
    MANIFEST_REPO_NAME,
    AUTH,
    MANIFEST_REPO_BRANCH
  );
  return await tc.findFromManifest(
    semanticVersionSpec,
    false,
    manifest,
    architecture
  );
}

async function installPython(workingDirectory: string) {
  const options: ExecOptions = {
    cwd: workingDirectory,
    env: {
      ...process.env,
      ...(IS_LINUX && {LD_LIBRARY_PATH: path.join(workingDirectory, 'lib')})
    },
    silent: true,
    listeners: {
      stdout: (data: Buffer) => {
        core.info(data.toString().trim());
      },
      stderr: (data: Buffer) => {
        core.error(data.toString().trim());
      }
    }
  };

  if (IS_WINDOWS) {
    await exec.exec('powershell', ['./setup.ps1'], options);
  } else {
    await exec.exec('bash', ['./setup.sh'], options);
  }
}

export async function installCpythonFromRelease(release: tc.IToolRelease) {
  const downloadUrl = release.files[0].download_url;

  core.info(`Download from "${downloadUrl}"`);
  const pythonPath = await tc.downloadTool(downloadUrl, undefined, AUTH);
  core.info('Extract downloaded archive');
  let pythonExtractedFolder;
  if (IS_WINDOWS) {
    pythonExtractedFolder = await tc.extractZip(pythonPath);
  } else {
    pythonExtractedFolder = await tc.extractTar(pythonPath);
  }

  core.info('Execute installation script');
  await installPython(pythonExtractedFolder);
}

function isGhes(): boolean {
  const ghUrl = new URL(
    process.env['GITHUB_SERVER_URL'] || 'https://github.com'
  );
  return ghUrl.hostname.toUpperCase() !== 'GITHUB.COM';
}