Added php-cs-fixer and integrated it into GHA workflow.

To check codestyle (both `src` and `tests` directories are checked) you
just run `./bin/code-style.sh` script, which will check if everything is
ok.

If there are some issues to fix, running `./bin/code-style.sh --fix` will
fix them.

.github/workflows/php.yml

@@ -22,6 +22,9 @@ jobs:
         chmod +x ./bin/*.sh
     - name: Run tests
       run: ./bin/tests.sh
+    - name: Run code style analysis
+      continue-on-error: false
+      run: ./bin/code-style.sh
     - name: Run static analysis
       continue-on-error: true
       run: ./bin/phpstan.sh

.gitignore

@@ -2,6 +2,9 @@
 .vscode
 *.code-workspace
 
+# php-cs-fixer
+.php-cs-fixer.cache
+
 # Tests.
 tests/**/output/**
 !tests/**/output/.gitkeep

.php-cs-fixer.dist.php

@@ -0,0 +1,166 @@
+<?php
+
+const DIRS = [
+	__DIR__ . '/src',
+	__DIR__ . '/tests',
+];
+
+$finder = (new \PhpCsFixer\Finder())
+	->in(DIRS)
+	->name('/\.phpt?$/');
+
+return (new PhpCsFixer\Config())
+    ->setRules([
+        'no_whitespace_in_blank_line' => true,
+		'no_closing_tag' => true,
+		'ternary_to_null_coalescing' => true,
+		'ternary_operator_spaces' => true,
+		'operator_linebreak' => [
+			'position' => 'beginning',
+		],
+		'unary_operator_spaces' => true,
+		'binary_operator_spaces' => true,
+		'new_with_parentheses' => true,
+		'no_space_around_double_colon' => true,
+		'long_to_shorthand_operator' => true,
+		'concat_space' => [
+			'spacing' => 'one',
+		],
+		'object_operator_without_whitespace' => true,
+		'clean_namespace' => true,
+        'array_indentation' => true,
+        'no_spaces_around_offset' => true,
+		'array_syntax' => true,
+		'list_syntax' => true,
+		'attribute_empty_parentheses' => [
+			'use_parentheses' => true,
+		],
+		'blank_line_after_namespace' => true,
+		'single_space_around_construct' => true,
+		'yoda_style' => [
+			'equal' => false,
+			'identical' => false,
+			'less_and_greater' => false,
+		],
+		'elseif' => true,
+		'no_superfluous_elseif' => true,
+		'include' => true,
+		'explicit_indirect_variable' => true,
+		'declare_parentheses' => true,
+		'declare_equal_normalize' => true,
+		'combine_consecutive_unsets' => true,
+		'single_line_after_imports' => true,
+		'single_import_per_statement' => true,
+		'no_unused_imports' => true,
+		'no_unneeded_import_alias' => true,
+		'no_leading_import_slash' => true,
+		'global_namespace_import' => [
+			'import_classes' => false,
+			'import_constants' => false,
+			'import_functions' => false,
+		],
+		'fully_qualified_strict_types' => true,
+		'no_spaces_after_function_name' => true,
+		'nullable_type_declaration_for_default_null_value' => true,
+		'method_argument_space' => true,
+		'lambda_not_used_import' => true,
+		'function_declaration' => [
+			'closure_fn_spacing' => 'none',
+			'closure_function_spacing' => 'none',
+		],
+		'trailing_comma_in_multiline' => [
+			'elements' => [
+				'arguments',
+				'arrays',
+				'match',
+				'parameters',
+			],
+		],
+		'switch_case_space' => true,
+		'switch_continue_to_break' => true,
+		'switch_case_semicolon_to_colon' => true,
+		'no_useless_else' => true,
+		'braces_position' => [
+			'allow_single_line_anonymous_functions' => true,
+			'allow_single_line_empty_anonymous_classes' => true,
+			'anonymous_classes_opening_brace' => 'same_line',
+			'anonymous_functions_opening_brace' => 'same_line',
+			'classes_opening_brace' => 'same_line',
+			'control_structures_opening_brace' => 'same_line',
+			'functions_opening_brace' => 'same_line',
+		],
+		'no_short_bool_cast' => true,
+		'lowercase_cast' => true,
+		'cast_spaces' => true,
+		'lowercase_keywords' => true,
+		'lowercase_static_reference' => true,
+		'magic_constant_casing' => true,
+		'magic_method_casing' => true,
+		'native_function_casing' => true,
+		'integer_literal_case' => true,
+		'control_structure_braces' => true,
+		'control_structure_continuation_position' => [
+			'position' => 'same_line',
+		],
+		'no_multiple_statements_per_line' => true,
+		'statement_indentation' => true,
+		'no_multiline_whitespace_around_double_arrow' => true,
+		'normalize_index_brace' => true,
+		'octal_notation' => true,
+        'indentation_type' => true,
+		'visibility_required' => true,
+		'whitespace_after_comma_in_array' => true,
+		'types_spaces' => [
+			'space' => 'none',
+		],
+		'single_line_empty_body' => true,
+		'method_chaining_indentation' => true,
+		'single_blank_line_at_eof' => true,
+		'spaces_inside_parentheses' => [
+			'space' => 'none',
+		],
+		'type_declaration_spaces' => true,
+		'compact_nullable_type_declaration' => true,
+		'space_after_semicolon' => [
+			'remove_in_empty_for_expressions' => true,
+		],
+		'no_trailing_comma_in_singleline' => true,
+		'encoding' => true,
+		'no_singleline_whitespace_before_semicolons' => true,
+		'no_empty_statement' => true,
+		'no_useless_return' => true,
+		'return_type_declaration' => true,
+		'multiline_whitespace_before_semicolons' => true,
+		'multiline_comment_opening_closing' => true,
+		'no_trailing_whitespace_in_comment' => true,
+		'single_line_comment_spacing' => true,
+		'single_line_comment_style' => true,
+		'phpdoc_var_without_name' => true,
+		'phpdoc_var_annotation_correct_order' => true,
+		'phpdoc_trim' => true,
+		'phpdoc_trim_consecutive_blank_line_separation' => true,
+		'phpdoc_summary' => true,
+		'phpdoc_to_comment' => [
+			'ignored_tags' => [
+				// To allow "/** @var SomeType $someVar */" annotations over
+				// variables for IDEs. PHP Intelephense (vscode extension), for
+				// example, wouldn't recognize "// @var SomeType $someVar"
+				// properly.
+				'var',
+			],
+		],
+		'phpdoc_single_line_var_spacing' => true,
+		'phpdoc_scalar' => true,
+		'phpdoc_param_order' => true,
+		'phpdoc_order' => true,
+		'phpdoc_indent' => true,
+		'no_superfluous_phpdoc_tags' => true,
+		'no_empty_phpdoc' => true,
+		'no_blank_lines_after_phpdoc' => true,
+        'align_multiline_comment' => [
+			'comment_type' => 'all_multiline',
+		],
+    ])
+    ->setIndent("\t")
+    ->setLineEnding("\n")
+	->setFinder($finder);

bin/code-style.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+cd $(dirname $0)/..
+
+ARG="$1"
+[[ $ARG == "--fix" ]] && COMMAND="fix" || COMMAND="check"
+
+./vendor/bin/php-cs-fixer $COMMAND --diff -vvv
+EXITCODE=$?
+
+if [[ $COMMAND == "check" && $EXITCODE -gt 0 ]]; then
+	echo
+	echo "█ Oh noes, php-cs-fixer found issues with code style."
+	echo "█ Run '$0 --fix' to fix them."
+fi
+
+if [[ $EXITCODE -eq 0 ]]; then
+	echo
+	echo "█ Everything went ok."
+fi
+
+# Bubble up the exit code to the original caller.
+exit $EXITCODE

composer.json

@@ -24,7 +24,8 @@
 	"require-dev": {
 		"nette/tester": "^2.4",
 		"phpstan/phpstan": "^1.8",
-		"predis/predis": "^2"
+		"predis/predis": "^2",
+		"friendsofphp/php-cs-fixer": "^3.37"
 	},
 	"suggest": {
 		"predis/predis": "Adds support for Predis - a PHP library providing a Redis result backend"