Composer fails executing app/console cache:clear on symfony 3 - composer-php

Question

I cant run composer install because it fails when executing the post-install-cmd-scripts.
The reason is Symfony 3 moved the console app from the app folder to a bin folder.
I have tried composer clear-cache and composer self-update, so I can verify that I'm running the latest version of composer without any luck... Can anyone help me?
Results from composer diagnose
composer diagnose
Checking composer.json: FAIL
Defining autoload.psr-4 with an empty namespace prefix is a bad idea for performance
require.symfony/symfony : unbound version constraints (dev-master) should be avoided
Checking platform settings: OK
Checking git settings: OK
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: OK
Checking github.com rate limit: OK
Checking disk free space: OK
Checking composer version: OK
Edit:
Added my composer.json file: Pastie
Extra's part:
"extra": {
"symfony-app-dir": "app",
"symfony-bin-dir": "bin",
"symfony-var-dir": "var",
"symfony-web-dir": "web",
"symfony-tests-dir": "tests",
"symfony-assets-install": "relative",
"incenteev-parameters": {
"file": "app/config/parameters.yml"
}
}
Error from Composer:
Could not open input file: app/console
Script Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache handling the post-install-cmd event terminated with an exception
[RuntimeException]
An error occurred when executing the "'cache:clear --no-warmup'" command:
Could not open input file: app/console
.
Manuall test of bin/composer cache:clear:
bin/console cache:clear
// Clearing the cache for the dev environment with debug true
[OK] Cache for the "dev" environment (debug=true) was successfully cleared.
The problem repo: https://bitbucket.org/Richardh87/messenger

Answer 1

Had the same problem. Found that var directory was missing.
Adding var directory to project root dir solved this for me. It looks like symfony 3 tries to use old project structure if var folder is missing. Hope this can help someone.

Answer 2

try
sudo rm -rf vendor/*
sudo rm -rf composer.lock
then run
composer install
again

Answer 3

Check the extra config key in the composer.json files names as symfony-bin-dir.
So check that the composer contain the correct configuration key, as example:
composer.json
....
"extra": {
"symfony-app-dir": "app",
"symfony-bin-dir": "bin",
"symfony-var-dir": "var",
....

Answer 4

Changing the gitignore worked for me, like this:
# Cache and logs (Symfony3)
/var/cache/*
/var/logs/*
!var/cache/.gitkeep
!var/logs/.gitkeep
# Parameters
/app/config/parameters.yml
/app/config/parameters.ini
# Managed by Composer
/app/bootstrap.php.cache
/var/bootstrap.php.cache
/bin/*
!bin/console
!bin/symfony_requirements
/vendor/
# Assets and user uploads
/web/bundles/
/web/uploads/
# Assets managed by Bower
/web/assets/vendor/
# PHPUnit
/app/phpunit.xml
/phpunit.xml
# Build data
/build/
# Composer PHAR
/composer.phar