this one hast it cleaner:
Wunderdata@35a3a31

It is not bundle problem. You can move symfony/dotenv from dev deps in composer.json, or just set env vars properly.
http://symfony.com/doc/current/best_practices/configuration.html

yep but you still have pass app_env manually to the "composer install"-call, otherwise the call will fail with
"symfony-cmd handling the auto-scripts event returned with error code 127"

You can set it (and other vars like APP_DEBUG) in ~/.profile or ~/.bashrc for user which doing deploy for example export APP_ENV=prod
Or just

set -a
. /path/to/project/.env
set +a

https://unix.stackexchange.com/questions/79064/how-to-export-variables-from-a-file

AbstractDeployer actually sets variable SYMFONY_ENV to provided ->symfonyEnvironment(), which is later used in commands:
[[email protected]] Executing command: (export SYMFONY_ENV=staging; cd /usr/local/www/...
but this environment variable has no meaning in Symfony4 - code should set APP_ENV instead when run on version 4.

I also have problems with Symfony 4 and .env file

Unable to read the "[...]/releases/20180208192107/bin/../.env" environment file.

@cve Have you found the solution to this problem? I have the same problem with Symfony 4.

@MSDATDE not yet

Does anyone has an example how to using this bundle with Symfony 4?

Hi,

i had the same error:

  Generating autoload files
  Executing script cache:clear [KO]
   [KO]
  Script cache:clear returned with error code 255
  !!  PHP Fatal error:  Uncaught Symfony\Component\Dotenv\Exception\PathException: Unable to read the "/var/www/domain/releases/20190126225728/.env" environment file. in /var/www/domain/releases/20190126225728/vendor
  /symfony/dotenv/Dotenv.php:466
  !!  Stack trace:

The main problem is: https://symfony.com/doc/current/configuration/dot-env-changes.html

B) The .env file is now commited to your repository. It was previously ignored via the .gitignore file (the updated recipe does not ignore this file). Because this file is committed, it should contain non-sensitive, default values. Basically, the .env.dist file was moved to .env.

FIX: #86

bin/console deploy staging
Initializing configuration
Starting the deployment
Updating app code
Preparing app
Optimizing app
Publishing app
Finishing the deployment
[OK] Deployment was successful

I ran into the same issue. Since #86 has not been merged yet I solved it by adding a command to the beforePreparing() hook as such:

public function beforePreparing()
{
   $this->runRemote(sprintf('cp {{ deploy_dir }}/repo/.env {{ project_dir }} 2>/dev/null'));
}

@PtrTn I have made the same but still having an error afer composer install:

[KO]
  Script cache:clear returned with error code 1
  !!
  !!  In EnvVarProcessor.php line 162:
  !!
  !!    Environment variable not found: "APP_SERVER".

If I interrupt the deployment just at this step and run the same command manually, it works.
I have added the ENV var in .bashrc, so they are defined:

[21:51:04] root@vps:/var/www-deploy/site.com/releases/20191129214947# printenv | grep -i app
APP_SECRET=whatever
APP_DEBUG=0
APP_ENV=prod
APP_SERVER=prod