Creating relative symlinks fail on Linux

[biwerr]

Looks like there are some problems with relative symlinks on linux.

Failed to create symlink | target: /var/www/web556/html/cms/system/modules/euf_grid | source: /var/www/web556/html/cms/vendor/erdmannfreunde/euf_grid

I've replaced creating relative links with absolute links, seems to work

 if (Platform::isWindows()) {
                $success = @symlink($source, $target);
            } else {
                //$success = $this->filesystem->relativeSymlink($source, $target);

                $success = symlink($source, $target);
            }

            if (!$success) {
                throw new \RuntimeException('Failed to create symlink | target: ' . $target. ' | source: '.$source);
            }

Exception trace:
 () at /var/www/web556/html/cms/vendor/contao-community-alliance/composer-plugin/src/Installer/AbstractModuleInstaller.php:254
 ContaoCommunityAlliance\Composer\Plugin\Installer\AbstractModuleInstaller->addSymlinks() at /var/www/web556/html/cms/vendor/contao-community-alliance/composer-plugin/src/Installer/AbstractModuleInstaller.php:92
 ContaoCommunityAlliance\Composer\Plugin\Installer\AbstractModuleInstaller->install() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Installer/InstallationManager.php:173
 Composer\Installer\InstallationManager->install() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Installer/InstallationManager.php:160
 Composer\Installer\InstallationManager->execute() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Installer.php:584
 Composer\Installer->doInstall() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Installer.php:223
 Composer\Installer->run() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Command/InstallCommand.php:119
 Composer\Command\InstallCommand->execute() at phar:///var/www/web556/html/cms/composer.phar/vendor/symfony/console/Command/Command.php:267
 Symfony\Component\Console\Command\Command->run() at phar:///var/www/web556/html/cms/composer.phar/vendor/symfony/console/Application.php:846
 Symfony\Component\Console\Application->doRunCommand() at phar:///var/www/web556/html/cms/composer.phar/vendor/symfony/console/Application.php:191
 Symfony\Component\Console\Application->doRun() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Console/Application.php:227
 Composer\Console\Application->doRun() at phar:///var/www/web556/html/cms/composer.phar/vendor/symfony/console/Application.php:122
 Symfony\Component\Console\Application->run() at phar:///var/www/web556/html/cms/composer.phar/src/Composer/Console/Application.php:100
 Composer\Console\Application->run() at phar:///var/www/web556/html/cms/composer.phar/bin/composer:54
 require() at /var/www/web556/html/cms/composer.phar:24

[aschempp]

Looks like that's an issue on your system? Relative symlinks usually work on Linux but not in Windows. Can you try if they work on the command line?

[biwerr]

This was symlink creation at command line on an ssh shell at my reseller account on alfahosting. Seems there are some problems with hosting packages.

I've switched to a diffrent hosting partner and there where no problems.

Maybe try to fix this possible bug with first creating relative symlinks and if that fails switch to absolute symlinks?

if (Platform::isWindows()) {
                $success = @symlink($source, $target);
            } else {
                $success = $this->filesystem->relativeSymlink($source, $target);

                if(!$success)
                     $success = @symlink($source, $target);
            }

            if (!$success) {
                throw new \RuntimeException('Failed to create symlink | target: ' . $target. ' | source: '.$source);
            }