Composer fails to install laravel/socialite 2.0

Question

composer require laravel/socialite ^2.0

is failing with below error:

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for laravel/socialite 2.0 -> satisfiable by laravel/socialite[v2.0.0].
    - Conclusion: remove guzzlehttp/guzzle 6.2.2
    - Conclusion: don't install guzzlehttp/guzzle 6.2.2
    - laravel/socialite v2.0.0 requires guzzlehttp/guzzle ~4.0 -> satisfiable by guzzlehttp/guzzle[4.0.0, 4.0.1, 4.0.2, 4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.1.6, 4.1.7, 4.1.8, 4.2.0, 4.2.1, 4.2.2, 4.2.3, 4.2.4].
    - Can only install one of: guzzlehttp/guzzle[4.0.0, 6.2.2].
    ...
    - Can only install one of: guzzlehttp/guzzle[4.2.4, 6.2.2].
    - Installation request for guzzlehttp/guzzle (locked at 6.2.2) -> satisfiable by guzzlehttp/guzzle[6.2.2].


Installation failed, reverting ./composer.json to its original content.

Laravel version is 5.3.22

PHP version is 7.0.10

The composer.json of socialite2.0 on github shows the dependency as guzzlehttp 5.0/ 6.0. Why's my install looking for guzzlehttp 4.0?

EDIT-1:

I tried to force guzzlehttp 4.2.4 by adding it in composer.json require-dev.

However, I received following error:

  Problem 1
    - The requested package guzzlehttp/guzzle (locked at 6.2.2, required as 4.2.4) is satisfiable by guzzlehttp/guzzle[6.2.2] but these conflict with your requirements or minimum-stability.
  Problem 2
    - aws/aws-sdk-php 3.19.23 requires guzzlehttp/guzzle ^5.3.1|^6.2.1 -> satisfiable by guzzlehttp/guzzle[5.3.1, 5.3.2, 5.3.x-dev, 6.2.1, 6.2.2, 6.2.3, 6.3.0, 6.2.x-dev] but these conflict with your requirements or minimum-stability.
    - aws/aws-sdk-php 3.19.23 requires guzzlehttp/guzzle ^5.3.1|^6.2.1 -> satisfiable by guzzlehttp/guzzle[5.3.1, 5.3.2, 5.3.x-dev, 6.2.1, 6.2.2, 6.2.3, 6.3.0, 6.2.x-dev] but these conflict with your requirements or minimum-stability.
    - aws/aws-sdk-php 3.19.23 requires guzzlehttp/guzzle ^5.3.1|^6.2.1 -> satisfiable by guzzlehttp/guzzle[5.3.1, 5.3.2, 5.3.x-dev, 6.2.1, 6.2.2, 6.2.3, 6.3.0, 6.2.x-dev] but these conflict with your requirements or minimum-stability.
    - Installation request for aws/aws-sdk-php (locked at 3.19.23) -> satisfiable by aws/aws-sdk-php[3.19.23].

Apparently, aws-sdk-php requires guzzlehttp 5.3/ 6.2. Laravel 5.3 is not compatible with socialite 3.0. Socialite 2.0 is not compatible with guzzlehttp 5.3/ 6.2.

How to resolve this?

TIA

EDIT-2:

my composer.json has below content:

{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
    "php": ">=5.6.4",
    "laravel/framework": "5.3.*",
    "doctrine/dbal": "^2.5",
    "aws/aws-sdk-php-laravel": "~3.0"
},
"require-dev": {
    "fzaninotto/faker": "~1.4",
    "mockery/mockery": "0.9.*",
    "phpunit/phpunit": "~5.0",
    "symfony/css-selector": "3.1.*",
    "symfony/dom-crawler": "3.1.*"
},
"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "App\\": "app/"
    }
},
"autoload-dev": {
    "classmap": [
        "tests/TestCase.php"
    ]
},
"scripts": {
    "post-root-package-install": [
        "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
    ],
    "post-create-project-cmd": [
        "php artisan key:generate"
    ],
    "post-install-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postInstall",
        "php artisan optimize"
    ],
    "post-update-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postUpdate",
        "php artisan optimize"
    ]
},
"config": {
    "preferred-install": "dist"
}

}

One possibility is install at old version of aws/aws-sdk-php for example 2.8 version of this package — sk11z00
Another solution is update your laravel version to 5.3 at 5.4, your system supported requisites. github.com/laravel/framework/blob/5.4/composer.json — sk11z00
@ThomasEdwards, I posted composer.json. adding guzzlehttp 4.2.4 to require-dev revealed aws-sdk-php dependency. upgrading Laravel version or downgrading aws-sdk-php requires lot of effort, to validate the application. Unfortunately, that's not an option.. — Krishna Chebrolu
BTW, my primary requirement is to allow users to post photos to FB/Twitter/G+ from our website (NOT the links). Is there any alternative available to achieve this? — Krishna Chebrolu

Krishna Chebrolu Krishna Chebrolu · Accepted Answer · 2018-01-26T07:10:41

Here's how the issue got resolved: It turned out to be simple. As I'm still learning what composer can do, I couldn't figure it out earlier.

Changing from ^ to ~ in the version did the trick. As per Mastering Composer - tips & tricks, both tilde (~) & caret (^) should allow minor versions in the packages. But, it appears "only be careful of breaking changes" took the precedence over allowing minor versions. (at least, that's the conclusion I arrived at).

Following is the result:

composer require laravel/socialite:~2.0
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 2 installs, 0 updates, 0 removals
  - Installing league/oauth1-client (1.7.0): Downloading (100%)
  - Installing laravel/socialite (v2.0.21): Downloading (100%)
Writing lock file
Generating autoload files
> Illuminate\Foundation\ComposerScripts::postUpdate
> php artisan optimize
Generating optimized class loader
Compiling common classes

Composer fails to install laravel/socialite 2.0

4 Answers