snyk-docker-plugin/lib/sub-process.ts

Snyk CLI docker plugin

import * as childProcess from "child_process";

export { execute, CmdOutput };
interface CmdOutput {
  stdout: string;
  stderr: string;
}

function execute(
  command: string,
  args: string[],
  options?,
): Promise<CmdOutput> {
  const spawnOptions: any = {
    // Some distributions may not have /bin/bash, which would cause `child_process.spawn` to fail.
    // By setting `shell: false`, we tell `spawn` to execute the command directly without a shell,
    // which is more portable.
    shell: false,
    env: { ...process.env },
  };
  if (options && options.cwd) {
    spawnOptions.cwd = options.cwd;
  }

  // Before spawning an external process, we look if we need to restore the system proxy configuration,
  // which overrides the cli internal proxy configuration.
  if (process.env.SNYK_SYSTEM_HTTP_PROXY !== undefined) {
    spawnOptions.env.HTTP_PROXY = process.env.SNYK_SYSTEM_HTTP_PROXY;
  }
  if (process.env.SNYK_SYSTEM_HTTPS_PROXY !== undefined) {
    spawnOptions.env.HTTPS_PROXY = process.env.SNYK_SYSTEM_HTTPS_PROXY;
  }
  if (process.env.SNYK_SYSTEM_NO_PROXY !== undefined) {
    spawnOptions.env.NO_PROXY = process.env.SNYK_SYSTEM_NO_PROXY;
  }

  return new Promise((resolve, reject) => {
    let stdout = "";
    let stderr = "";

    const proc = childProcess.spawn(command, args, spawnOptions);
    proc.stdout.on("data", (data) => {
      stdout = stdout + data;
    });
    proc.stderr.on("data", (data) => {
      stderr = stderr + data;
    });

    proc.on("close", (code) => {
      const output = { stdout, stderr };
      if (code !== 0) {
        return reject(output);
      }
      resolve(output);
    });
  }) as Promise<CmdOutput>;
}