php-cs-fixer when run from grumphp

[kapdom]

Q	A
Version	1.13.0
Bug?	yes
New feature?	no
Question?	yes/no
Documentation?	no

My configuration

grumphp:
    tasks:
        phpcsfixer:
            allow_risky: ~
            cache_file: ~
            config: ~
            rules:
                '@PSR2': true
                line_ending: false
                array_syntax:
                    syntax: short
            using_cache: false
            config_contains_finder: true
            verbose: true
            diff: true
            triggered_by: [ 'php' ]

    git_hook_variables:
        DOCKER_CONTAINER: php_centralised_app
        DOCKER_HOME_DIRECTORY: /var/www/html
        EXEC_GRUMPHP_COMMAND: docker exec -i $(docker-compose ps -q php) php
        ENV: { }

.php.cs-fixer.php file

<?php

use PhpCsFixer\Config;
use PhpCsFixer\Finder;

$rules = [
    'array_syntax' => ['syntax' => 'short'],
    'binary_operator_spaces' => [
        'default' => 'single_space',
        'operators' => ['=>' => null]
    ],
    'blank_line_after_namespace' => true,
    'blank_line_after_opening_tag' => true,
    'blank_line_before_statement' => [
        'statements' => ['return']
    ],
    'braces' => true,
    'cast_spaces' => true,
    'class_attributes_separation' => [
        'elements' => [
            'method' => 'one',
            'trait_import' => 'none'
        ]
    ],
    'class_definition' => true,
    'concat_space' => [
        'spacing' => 'one'
    ],
    'declare_equal_normalize' => true,
    'elseif' => true,
    'encoding' => true,
    'full_opening_tag' => true,
    'fully_qualified_strict_types' => true,
    'function_declaration' => true,
    'function_typehint_space' => true,
    'heredoc_to_nowdoc' => true,
    'include' => true,
    'increment_style' => ['style' => 'post'],
    'indentation_type' => true,
    'linebreak_after_opening_tag' => true,
    'line_ending' => true,
    'lowercase_cast' => true,
    'constant_case' => true,
    'lowercase_keywords' => true,
    'lowercase_static_reference' => true,
    'magic_method_casing' => true,
    'magic_constant_casing' => true,
    'method_argument_space' => true,
    'native_function_casing' => true,
    'no_alias_functions' => true,
    'no_extra_blank_lines' => [
        'tokens' => [
            'extra',
            'throw',
            'use'
        ]
    ],
    'no_blank_lines_after_class_opening' => true,
    'no_blank_lines_after_phpdoc' => true,
    'no_closing_tag' => true,
    'no_empty_phpdoc' => true,
    'no_empty_statement' => true,
    'no_leading_import_slash' => true,
    'no_leading_namespace_whitespace' => true,
    'no_mixed_echo_print' => [
        'use' => 'echo'
    ],
    'no_multiline_whitespace_around_double_arrow' => true,
    'multiline_whitespace_before_semicolons' => [
        'strategy' => 'no_multi_line'
    ],
    'no_short_bool_cast' => true,
    'no_singleline_whitespace_before_semicolons' => true,
    'no_spaces_after_function_name' => true,
    'no_spaces_around_offset' => true,
    'no_spaces_inside_parenthesis' => true,
    'no_trailing_comma_in_list_call' => true,
    'no_trailing_comma_in_singleline_array' => true,
    'no_trailing_whitespace' => true,
    'no_trailing_whitespace_in_comment' => true,
    'no_unneeded_control_parentheses' => true,
    'no_unreachable_default_argument_value' => true,
    'no_useless_return' => true,
    'no_whitespace_before_comma_in_array' => true,
    'no_whitespace_in_blank_line' => true,
    'normalize_index_brace' => true,
    'not_operator_with_successor_space' => false,
    'object_operator_without_whitespace' => true,
    'ordered_imports' => ['sort_algorithm' => 'alpha'],
    'phpdoc_indent' => true,
    'general_phpdoc_tag_rename' => true,
    'phpdoc_inline_tag_normalizer' => true,
    'phpdoc_tag_type' => true,
    'phpdoc_no_access' => true,
    'phpdoc_no_package' => true,
    'phpdoc_no_useless_inheritdoc' => true,
    'phpdoc_scalar' => true,
    'phpdoc_single_line_var_spacing' => true,
    'phpdoc_summary' => true,
    'phpdoc_to_comment' => true,
    'phpdoc_trim' => true,
    'phpdoc_types' => true,
    'phpdoc_var_without_name' => true,
    'psr_autoloading' => true,
    'self_accessor' => true,
    'short_scalar_cast' => true,
    'simplified_null_return' => false,
    'single_blank_line_at_eof' => true,
    'single_blank_line_before_namespace' => true,
    'single_class_element_per_statement' => true,
    'single_import_per_statement' => true,
    'single_line_after_imports' => true,
    'single_line_comment_style' => [
        'comment_types' => ['hash']
    ],
    'single_quote' => true,
    'space_after_semicolon' => true,
    'standardize_not_equals' => true,
    'switch_case_semicolon_to_colon' => true,
    'switch_case_space' => true,
    'ternary_operator_spaces' => true,
    'trailing_comma_in_multiline' => true,
    'trim_array_spaces' => true,
    'unary_operator_spaces' => true,
    'visibility_required' => [
        'elements' => ['method', 'property']
    ],
    'whitespace_after_comma_in_array' => true,
    'no_unused_imports' => true,
];


$finder = Finder::create()
    ->in([
        __DIR__ . '/app',
        __DIR__ . '/config',
        __DIR__ . '/database',
        __DIR__ . '/resources',
        __DIR__ . '/routes',
        __DIR__ . '/tests',
    ])
    ->name('*.php')
    ->notName('*.blade.php')
    ->ignoreDotFiles(true)
    ->ignoreVCS(true);

$config = new Config();
return $config->setFinder($finder)
    ->setRules($rules)
    ->setRiskyAllowed(true)
    ->setUsingCache(true);

pre-commit hook

#!/bin/sh

#
# Run the hook command.
# Note: this will be replaced by the real command during copy.
#

# Fetch the GIT diff and format it as command input:
DIFF=$(git -c diff.mnemonicprefix=false -c diff.noprefix=false --no-pager diff -r -p -m -M --full-index --no-color --staged | cat)

# Grumphp env vars

export GRUMPHP_GIT_WORKING_DIR="$(git rev-parse --show-toplevel)"

# Run GrumPHP
(cd "./" && printf "%s\n" "${DIFF}" | docker exec -i $(docker-compose ps -q php) php 'vendor/bin/grumphp' 'git:pre-commit' '--skip-success-output')

Hi. When I run grumphp from command line vendor/bin/grumphp run then everything is ok. But when grumphp run is triggered by git pre-commit hook then I have error.

PHP CS Fixer 3.11.0 Oliva by Fabien Potencier and Dariusz Ruminski.
PHP runtime: 7.4.30

In ConfigurationResolver.php line 551:
                                                                          
  [PhpCsFixer\ConfigurationException\InvalidConfigurationException (16)]  
  For multiple paths config parameter is required.                        
                                                                          

Exception trace:
  at /var/www/html/vendor/friendsofphp/php-cs-fixer/src/Console/ConfigurationResolver.php:551
 PhpCsFixer\Console\ConfigurationResolver->computeConfigFiles() at /var/www/html/vendor/friendsofphp/php-cs-fixer/src/Console/ConfigurationResolver.php:243
 PhpCsFixer\Console\ConfigurationResolver->getConfig() at /var/www/html/vendor/friendsofphp/php-cs-fixer/src/Console/ConfigurationResolver.php:275
 PhpCsFixer\Console\ConfigurationResolver->getConfigFile() at /var/www/html/vendor/friendsofphp/php-cs-fixer/src/Console/Command/FixCommand.php:260
 PhpCsFixer\Console\Command\FixCommand->execute() at /var/www/html/vendor/symfony/console/Command/Command.php:298
 Symfony\Component\Console\Command\Command->run() at /var/www/html/vendor/symfony/console/Application.php:1028
 Symfony\Component\Console\Application->doRunCommand() at /var/www/html/vendor/symfony/console/Application.php:299
 Symfony\Component\Console\Application->doRun() at /var/www/html/vendor/friendsofphp/php-cs-fixer/src/Console/Application.php:94
 PhpCsFixer\Console\Application->doRun() at /var/www/html/vendor/symfony/console/Application.php:171
 Symfony\Component\Console\Application->run() at /var/www/html/vendor/friendsofphp/php-cs-fixer/php-cs-fixer:114
 include() at /var/www/html/vendor/bin/php-cs-fixer:115

When I debug this error I see in line 546 I have following content in variable.

array:2 [
  0 => "/var/www/html/.php-cs-fixer.php"
  1 => "/var/www/html/app/Services/PostUpdateService.php"
]

Why that second file in array this is a file I modified before commit. So why phpfixer take it as config?