PHP_CodeSniffer Baseliner
This tool enables you to integrate PHP_CodeSniffer into an existing project by automatically adding phpcs:ignore
and phpcs:disable
/phpcs:enable
instructions throughout the codebase as a baseline. This allows you to make PHP_CodeSniffer pass without changing any source code, making it possible to use PHP_CodeSniffer in e.g. continuous integration pipelines or git hooks. This way, you can enforce that all new code adheres to your coding standard without touching the existing code.
Installation
Require the package with composer:
composer require --dev isaac/php-code-sniffer-baseliner
It is also possible to install this package as a global composer dependency.
Usage
In order to add phpcs:ignore
and phpcs:disable
/phpcs:enable
instructions throughout your project, run:
vendor/bin/phpcs-baseliner create-baseline
How does it work?
First, the tool runs vendor/bin/phpcs
and captures the report. Based on the report output, it will add // phpcs:ignore
instructions to the source code for each violation. It will only ignore the sniffs that actually are violated. In rare cases, adding these instructions could introduce new violations. Therefore, this process is repeated until no violations are reported by phpcs
.
Example
Let's say we want to enforce declare(strict_types = 1);
statements and native property type hints using PHP_CodeSniffer. The Slevomat Coding Standard has sniffs for this: SlevomatCodingStandard.TypeHints.DeclareStrictTypes
and SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingNativeTypeHint
. We install Slevomat Coding Standard and add the sniffs to our ruleset in phpcs.xml
.
If we now run vendor/bin/phpcs-baseliner create-baseline
in our project, it will add ignore instructions in all files not containing declare(strict_types = 1);
statements or native property type declarations:
- <?php
+ <?php // phpcs:ignore SlevomatCodingStandard.TypeHints.DeclareStrictTypes -- baseline
class Foo {
+ // phpcs:ignore SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingNativeTypeHint -- baseline
private $bar;
}
In some cases, it is not possible to insert a // phpcs:ignore
instruction directly above the violated line (e.g. multi-line strings). In those cases, // phpcs:disable
and // phpcs:enable
instructions are added:
<?php
class Foo {
+ // phpcs:disable Generic.Files.LineLength.TooLong -- baseline
public const BAR = '
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas malesuada, lectus vitae vestibulum vulputate, mi morbi.';
+ // phpcs:enable Generic.Files.LineLength.TooLong -- baseline
}
Features
- Automatic indentation
- Ignoring a group of multiple exclusions per line, e.g.
// phpcs:ignore Generic.Files.LineLength.TooLong, Generic.Arrays.DisallowLongArraySyntax -- baseline
- Merging new instructions with existing instructions
- Messages of existing instructions are merged as wel:
// phpcs:ignore Generic.Files.LineLength.TooLong, Generic.Arrays.DisallowLongArraySyntax -- existing message; baseline
- Using
phpcs:disable
/phpcs:enable
when insertingphpcs:ignore
is not possible (i.e. for multi-line strings, including HEREDOCs and NOWDOCs) - Adding a star prefix when a violation is found within a comment block with stars, e.g.:
/* * phpcs:ignore Generic.Files.LineLength.TooLong * Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas malesuada, lectus vitae vestibulum vulputate, mi morbi. */
- All features are unit tested, see the
AddBaselineProcessorTestDataProvider
class for an extensive test data set.
Roadmap
- Support processing files that do not start with
<?php
on the first line. - Support processing files that contain
?>
. - Support ignoring violations on the first line of a file that end with a multi-line string, example:
<?php echo 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas malesuada, lectus vitae vestibulum vulputate, mi morbi.'; ?>
- Support detection of and merging with older types of ignore instructions, such as
@phpcsSuppress
.