browscap-php is incompatible with psr/cache 3 (e.g. Symfony Cache)

[j-dobr]

Tried to use browscap-php with Symfony 6 (symfony/skeleton) but there is dependency conflict:

    - Root composer.json requires browscap/browscap-php 7.0 -> satisfiable by browscap/browscap-php[7.0.0].
    - matthiasmullie/scrapbook 1.4.8 requires psr/cache ~1.0 -> satisfiable by psr/cache[1.0.0, 1.0.1].
    - You can only install one version of a package, so only one of these can be installed: psr/cache[1.0.0, 1.0.1, 2.0.0, 3.0.0].
    - symfony/cache-contracts v3.0.0 requires psr/cache ^3.0 -> satisfiable by psr/cache[3.0.0].
    - symfony/cache v6.0.6 requires symfony/cache-contracts ^1.1.7|^2|^3 -> satisfiable by symfony/cache-contracts[v3.0.0].
    - doctrine/doctrine-bundle 2.6.0 requires symfony/cache ^4.3.3|^5.0|^6.0 -> satisfiable by symfony/cache[v6.0.6].
    - browscap/browscap-php 7.0.0 requires matthiasmullie/scrapbook ^1.4.8 -> satisfiable by matthiasmullie/scrapbook[1.4.8].
    - doctrine/doctrine-bundle is locked to version 2.6.0 and an update of this package was not requested.

Is there any way to resolve this?

[Rubinum]

its been half a year... are there any updates? do you need help upgrading this?

[asgrim]

If a patch can be made, sure, it would be welcome 👍 thanks.

Please note: we must retain support for psr/cache:^1.0, which I think is where the difficulty lies.

[j-dobr]

That is the problem indeed - psr/cache:^1.0 is not compatible with Symfony (symfony/cache to be specific, which is part of symfony/skeleton). And since support for psr/cache:^1.0 must be retained, there is no solution.

Main reason for me bringing this up were release notes of v7.0.0 with #418 which made me think it should be compatible with Symfony 6, but it seems that was only about specific Symfony component.

[Rubinum]

You can reproduce this issue if you

• require symfony cache 5.4
• require this project at the latest stable version
• upgrade to symfony 6.* by following the instructions mentioned in the upgrade guide.

[holtkamp]

Additionally: matthiasmullie/scrapbook 1.4.8 requires psr/cache ~1.0

Since matthiasmullie/scrapbook is a currently a hard dependency

browscap-php/composer.json

Line 36 in c4d665a

"matthiasmullie/scrapbook": "^1.4.8",

this dependency also needs to support psr/cache ^2.0 || ^3.0

Requested this here matthiasmullie/scrapbook#54

Isolate the Commands and reduce dependencies?
Another approach might be to isolate the Commands (which use matthiasmullie/scrapbook) in a separate repository along with dependencies such as symfony/console and league/flysystem, only used in the Commands...

[Rubinum]

I found out, that you can circumvent this issue by:

1. removing browsecap via composer remove browscap/browscap-php
2. updating symfony to symfony 6 according to the official guide
3. installing it again via composer require browscap/browscap-php

If someone has the same issue, try this. I hope it helps :). No clue why composer is throwing this issue while updating but if someone can bring more light into this, why this happens, I am definitely interested.

[Crovitche-1623]

Hello guys,

I don't know if the following snippets can help you but here's how I managed to get Symfony's cache working with Browscap.

First, register a new cache pool:

# config/packages/cache.yaml

framework:
    cache:
        pools:
            # To prevent the browscap cache being deleted by the `cache:clear`
            # command. A custom cache pool is used.
            #
            # Note: this cache can be cleared using the 
            #       `cache:pool:clear browscap_cache` in order to force the 
            #       browscap cache to be reloaded.
            browscap_cache:
                adapter: cache.adapter.filesystem

Then, configure the dependencie for Browscap classes:

# config/services.yaml

services:
  # As Browscap uses a PSR-16 cache but Symfony use a PSR-6 cache, we need to
  # wrap the PSR-6 cache into a PSR-16 cache
  Symfony\Component\Cache\Psr16Cache:
    arguments:
      # The cache pool is defined in `config/packages/cache.yaml`
      # the name matters, it must be the same as the one defined in cache.yaml
      - '@browscap_cache'

  BrowscapPHP\Browscap:
    arguments:
      # Note that the used cache must be the same as the one use for
      # `BrowscapPHP\BrowscapUpdater`
      - '@Symfony\Component\Cache\Psr16Cache'
      - '@logger'

  BrowscapPHP\BrowscapUpdater:
    arguments:
      # Note that the used cache must be the same as the one use for
      # `BrowscapPHP\Browscap`
      - '@Symfony\Component\Cache\Psr16Cache'
      - '@logger'

Now, you can directly inject Browscap classes and it will work. For instance:

<?php

use BrowscapPHP\Browscap;

readonly class FooBarService
{
    public function __construct(
        private Browscap $browscap,
    ) {
    }

    public function test(Request $request)
    {
        $information = $this->browscap->getBrowser($request->headers->get('User-Agent'));
    }
}