Globally installed Drush 11 (no Drupal) depends on symfony/http-kernel but does not require it

[AlexSkrypnyk]

Describe the bug
Fresh install of Composer

PHP 8.1.5 (cli) (built: Apr 16 2022 00:14:18) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.5, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.5, Copyright (c), by Zend Technologies
Composer version 2.3.6 2022-06-01 21:57:13

Checked several times - installing Drush 11 and then calling drush --version ends up with

Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Kernel" not found in /Users/____/.composer/vendor/drush/drush/src/Preflight/Preflight.php:208
Stack trace:
#0 /Users/____/.composer/vendor/drush/drush/src/Runtime/Runtime.php(84): Drush\Preflight\Preflight->loadSymfonyCompatabilityAutoloader()
#1 /Users/____/.composer/vendor/drush/drush/src/Runtime/Runtime.php(51): Drush\Runtime\Runtime->doRun(Array, Object(Symfony\Component\Console\Output\ConsoleOutput))
#2 /Users/____/.composer/vendor/drush/drush/drush.php(72): Drush\Runtime\Runtime->run(Array)
#3 /Users/____/.composer/vendor/drush/drush/drush(4): require('/Users/o_o/.com...')
#4 /Users/____/.composer/vendor/bin/drush(117): include('/Users/o_o/.com...')
#5 {main}
  thrown in /Users/____/.composer/vendor/drush/drush/src/Preflight/Preflight.php on line 208

Checked dependencies - no deps on symfony/http-kernel in ccomposer.json but the deps was introduced in #5108

https://github.com/drush-ops/drush/pull/5108/files#diff-fcb54a74a331c6112bd5cf5e32f08a4d0a39f42c16833b899b4fac0339d453c7R204

There are no other packages installed globally - only drush 11.

{
    "require": {
        "drush/drush": "^11.0"
    }
}

To Reproduce

composer global install drush/drush
drush --version

Expected behavior
Drush to print version

Actual behavior

Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Kernel" not found in /Users/____/.composer/vendor/drush/drush/src/Preflight/Preflight.php:208
Stack trace:
#0 /Users/____/.composer/vendor/drush/drush/src/Runtime/Runtime.php(84): Drush\Preflight\Preflight->loadSymfonyCompatabilityAutoloader()
#1 /Users/____/.composer/vendor/drush/drush/src/Runtime/Runtime.php(51): Drush\Runtime\Runtime->doRun(Array, Object(Symfony\Component\Console\Output\ConsoleOutput))
#2 /Users/____/.composer/vendor/drush/drush/drush.php(72): Drush\Runtime\Runtime->run(Array)
#3 /Users/____/.composer/vendor/drush/drush/drush(4): require('/Users/o_o/.com...')
#4 /Users/____/.composer/vendor/bin/drush(117): include('/Users/o_o/.com...')
#5 {main}
  thrown in /Users/____/.composer/vendor/drush/drush/src/Preflight/Preflight.php on line 208

Workaround
Explicitly install symfony/http-kernel globally

System Configuration

Q	A
Drush version?	11.0.9
Drupal version?	NONE
PHP version	8.1
OS?	Mac/Linux

Additional information
Attaching "pure"composer.lock - no deps on symfony/http-kernel declared and the package itself is not present.

composer.lock.txt

[AlexSkrypnyk]

Looking at CI config - there are only jobs with Drupal installed - there is no build of the standalone installation. Maybe it can be added to make sure that Drush can be installed without relying on Drupal's dependencies.

[weitzman]

I'm not sure that dependency is deliberate. Might be change that check to survive that package being missing. ping @greg-1-anderson

[greg-1-anderson]

Yeah, the reference was added here:

https://github.com/drush-ops/drush/pull/5108/files#diff-fcb54a74a331c6112bd5cf5e32f08a4d0a39f42c16833b899b4fac0339d453c7R204

Wasn't caught because a global install of Drush 11 is not a recommended configuration. Adding a direct dependency on symfony/http-kernel is reasonable, though.

[greg-1-anderson]

A global install of Drush 11 is only going to work with Drupal 9 anyway, so I suppose we could simply assume 6 if symfony/http-kernel does not exist. I think simply adding the dependency is probably more straightforward, though.

[weitzman]

I would prefer that over a new dependency. We dont speak http and I dont want anyone to get ideas that we should.

[greg-1-anderson]

I wonder if the Symfony major version exists in some other Symfony project.

[AlexSkrypnyk]

Can we please at least add some check for class existence or some other gate to prevent this.

Drush is installed on many systems as global and a version check is a simplest test that a package works. Currently, this fails, which breaks automations.

Even installing it as local without any other packages will lead to the same error when calling drush --version.

Thank you for looking into this in a such short notice.

[greg-1-anderson]

PRs welcome. I may eventually have time to take this on.

[greg-1-anderson]

As an aside, although global installs of Drush are not recommended in general, composer global require in particular is deprecated. See Fixing the Composer Global Command.

[chriscalip]

For anyone encountering this bug. Do this:
composer require symfony/http-kernel -W

[pheski]

composer require symfony/http-kernel -W did not work for me. I got this:

Using version ^5.4 for symfony/http-kernel
./composer.json has been updated
Running composer update symfony/http-kernel --with-all-dependencies
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires symfony/http-kernel ^5.4, found symfony/http-kernel[v5.4.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require.
Problem 2
- drupal/core-recommended is locked to version 9.5.0-beta2 and an update of this package was not requested.
- drupal/core-recommended 9.5.0-beta2 requires symfony/http-kernel ~v4.4.45 -> found symfony/http-kernel[v4.4.45, ..., 4.4.x-dev] but it conflicts with your root composer.json require (^5.4).
Problem 3
- drupal/core 9.5.0-beta2 requires symfony/http-kernel ^4.4 -> found symfony/http-kernel[v4.4.0-BETA1, ..., 4.4.x-dev] but it conflicts with your root composer.json require (^5.4).
- drupal/semver_example 2.3.0 requires drupal/core >=8 -> satisfiable by drupal/core[9.5.0-beta2].
- drupal/semver_example is locked to version 2.3.0 and an update of this package was not requested.

You can also try re-running composer require with an explicit version constraint, e.g. "composer require symfony/http-kernel:*" to figure out if any version is installable, or "composer require symfony/http-kernel:^2.1" if you know which you need.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.
[vps25749]$ composer require symfony/http-kernel:*
./composer.json has been updated
Running composer update symfony/http-kernel
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- drush/drush is present at version 1.0.0+no-version-set and cannot be modified by Composer
- drupal/core-recommended 9.5.0-beta2 requires drupal/core 9.5.0-beta2 -> satisfiable by drupal/core[9.5.0-beta2].
- drupal/core 9.5.0-beta2 conflicts with drush/drush <8.1.10.
- drupal/core-recommended is locked to version 9.5.0-beta2 and an update of this package was not requested.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.

[serrano1004]

composer require symfony/http-kernel -W did not work for me. I got this:

Using version ^5.4 for symfony/http-kernel ./composer.json has been updated Running composer update symfony/http-kernel --with-all-dependencies Loading composer repositories with package information Updating dependencies Your requirements could not be resolved to an installable set of packages.

Problem 1 - Root composer.json requires symfony/http-kernel ^5.4, found symfony/http-kernel[v5.4.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require. Problem 2 - drupal/core-recommended is locked to version 9.5.0-beta2 and an update of this package was not requested. - drupal/core-recommended 9.5.0-beta2 requires symfony/http-kernel ~v4.4.45 -> found symfony/http-kernel[v4.4.45, ..., 4.4.x-dev] but it conflicts with your root composer.json require (^5.4). Problem 3 - drupal/core 9.5.0-beta2 requires symfony/http-kernel ^4.4 -> found symfony/http-kernel[v4.4.0-BETA1, ..., 4.4.x-dev] but it conflicts with your root composer.json require (^5.4). - drupal/semver_example 2.3.0 requires drupal/core >=8 -> satisfiable by drupal/core[9.5.0-beta2]. - drupal/semver_example is locked to version 2.3.0 and an update of this package was not requested.

You can also try re-running composer require with an explicit version constraint, e.g. "composer require symfony/http-kernel:*" to figure out if any version is installable, or "composer require symfony/http-kernel:^2.1" if you know which you need.

Installation failed, reverting ./composer.json and ./composer.lock to their original content. [vps25749]$ composer require symfony/http-kernel:* ./composer.json has been updated Running composer update symfony/http-kernel Loading composer repositories with package information Updating dependencies Your requirements could not be resolved to an installable set of packages.

Problem 1 - drush/drush is present at version 1.0.0+no-version-set and cannot be modified by Composer - drupal/core-recommended 9.5.0-beta2 requires drupal/core 9.5.0-beta2 -> satisfiable by drupal/core[9.5.0-beta2]. - drupal/core 9.5.0-beta2 conflicts with drush/drush <8.1.10. - drupal/core-recommended is locked to version 9.5.0-beta2 and an update of this package was not requested.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.

¿Do you fix that issue? I have the same problem

[pheski]

I have not (yet) fixed the issue. (Disclaimer - I'm in a bit over my head and trying to understand explanations and suggestions from various support sources, so take my thoughts with several grains of salt.)

I was told it is better practice to install Composer globally but Drush locally in each project, and use drush-launcher to call/access the drush version that is appropriate for the given project.

https://github.com/drush-ops/drush-launcher

I installed Composer globally on my BPS without issue and then hit a brick wall with Drush. It seemed to install but wold not init. I've been told now to use drush-launcher but I am not sure whether or not to leave the drush I installed globally but could not init, and exactly what the work flow will be once I move my shared hosting projects into the VPS. I think I am supposed to - in EACH project - do composer require drush/drush and then use drush launcher to launch that version's drush.

[AllieRays]

For anyone encountering this bug. Do this:
composer require symfony/http-kernel -W

I think what you meant was

composer global require symfony/http-kernel -W

[greg-1-anderson]

Please do not use composer global require. See #5156 (comment).

[wholehope]

composer require symfony/http-kernel -W resolves the issue if drush is not globally installed by composer require drush/drush.

A dependency of Symfony is needed for drush, if drush is not installed along with Drupal.

[weitzman]

FYI this constant is not in Drush 12 anymore (not yet released). We can keep this issue open for prior versions.

[sayakray98]

C:\xampp\htdocs\silkmark-pressflow>drush updatedb
[preflight] Package "drupal/core" is not installed

How to fix this