async function getCredential()

in commands/run.js [75:163]
87 lines of code
14 McCabe index (conditional complexity)

async function getCredential(profile, parent) {
  switch (profile.mode) {
  case 'AK': {
    const id = profile['access_key_id'];
    const secret = profile['access_key_secret'];
    return new CredentialModel(id, secret);
  }
  case 'RamRoleArn': {
    const config = new Config({
      type: 'ram_role_arn',
      accessKeyId: profile['access_key_id'],          // AccessKeyId of your account
      accessKeySecret: profile['access_key_secret'],  // AccessKeySecret of your account
      roleArn: profile['ram_role_arn'],               // Format: acs:ram::USER_ID:role/ROLE_NAME
      roleSessionName: profile['ram_session_name'] || 'ACC_SESSION',  // Role Session Name
      // policy: 'policy',                            // Not required, limit the permissions of STS Token
      roleSessionExpiration: 3600,                    // Not required, limit the Valid time of STS Token
      stsRegion: profile['sts_region'] || 'cn-hangzhou'
    });
    const cred = new Credential(config);
    const id = await cred.getAccessKeyId();
    const secret = await cred.getAccessKeySecret();
    const securityToken = await cred.getSecurityToken();
    return new CredentialModel(id, secret, securityToken);
  }
  case 'EcsRamRole': {
    const config = new Config({
      type: 'ecs_ram_role',
      roleName: profile['ram_role_name']
    });
    const cred = new Credential(config);
    const id = await cred.getAccessKeyId();
    const secret = await cred.getAccessKeySecret();
    const securityToken = await cred.getSecurityToken();
    return new CredentialModel(id, secret, securityToken);
  }
  case 'CredentialsURI': {
    const config = new Config({
      type: 'credentials_uri',
      credentialsURI: profile['credentials_uri']
    });
    const cred = new Credential(config);
    const id = await cred.getAccessKeyId();
    const secret = await cred.getAccessKeySecret();
    const securityToken = await cred.getSecurityToken();
    return new CredentialModel(id, secret, securityToken);
  }
  case 'ChainableRamRoleArn': {
    const sourceProfileName = profile['source_profile'];
    const sourceProfile = loadProfile(parent, sourceProfileName);
    const credential = await getCredential(sourceProfile);
    const config = new Config({
      type: 'ram_role_arn',
      accessKeyId: credential.getAccessKeyId(),          // AccessKeyId of your account
      accessKeySecret: credential.getAccessKeySecret(),  // AccessKeySecret of your account
      securityToken: credential.getSecurityToken(),
      roleArn: profile['ram_role_arn'],               // Format: acs:ram::USER_ID:role/ROLE_NAME
      roleSessionName: profile['ram_session_name'] || 'ACC_SESSION',  // Role Session Name
      // policy: 'policy',                            // Not required, limit the permissions of STS Token
      roleSessionExpiration: 3600,                    // Not required, limit the Valid time of STS Token
      stsRegion: profile['sts_region'] || 'cn-hangzhou'
    });
    const cred = new Credential(config);
    const id = await cred.getAccessKeyId();
    const secret = await cred.getAccessKeySecret();
    const securityToken = await cred.getSecurityToken();
    return new CredentialModel(id, secret, securityToken);
  }
  case 'External': {
    const command = profile['process_command'];
    const cp = exec(command, {
      cwd: process.cwd(),
      encoding: null
    });
    const result = await onFinish(cp);
    const stdout = result.stdout.toString();
    const response = JSON.parse(stdout);
    if (response.mode === 'AK') {
      return new CredentialModel(response['access_key_id'], response['access_key_secret']);
    } else if (response.mode === 'STS') {
      return new CredentialModel(response['access_key_id'], response['access_key_secret'], response['security_token']);
    } else if (response.mode === 'StsToken') {
      return new CredentialModel(response['access_key_id'], response['access_key_secret'], response['sts_token']);
    }
    break;
  }
  default:
    return null;
  }
}