phpmd-extension

Features

Contains extra phpmd rules from clean code book and the best practices of my experiences.

• CleanCode
  • ConditionalExpression - increase readability
  • ConstructorNewOperator - decouple classes, see open-close principle
  • DataStructureConstants - increase maintainability
  • DataStructureMethods - increase extensibility, see single-responsibility principle
  • MemberPrimaryPrefix - supports low coupling, increase testability, see law of demeter
  • PublicFieldDeclaration - increase maintainability, see encapsulation/information hiding
  • ReturnStatement - increase reading rate, increase extensibility
  • SwitchStatement - increase extensibility, see open-close principle
  • TraitPublicMethod - increase maintainability, see encapsulation/information hiding
  • TryStatement - increase readability
  • PrivateFieldDeclaration - supports high cohesion, see DRY and single-responsibility principle
• Naming
  • ClassNameSuffix - increase extensibility, see single-responsibility principle
  • CommentDescription - reduce unused declarations, increase comprehensibility
  • MethodName - increase readability, increase comprehensibility
• Test
  • NumberOfMocks - increase testability, supports low coupling, see single-responsibility principle
  • NumberOfAsserts - increase maintainability, speed up debugging, see single-responsibility principle
  • MethodName - increase readability, increase comprehensibility

Installation

Download the phpmd-extension.phar:

$ curl -OsL https://github.com/mi-schi/phpmd-extension/releases/download/stable/phpmd-extension.phar

Alternatively you can use tooly-composer-script for installation.

It is also possible to use composer (not recommended, see #5):

composer require mi-schi/phpmd-extension --dev

Usage

1. Create a phpmd.xml file and import the basic rules from phpmd. The example below contains some useful changes. Afterwards you can extend the configuration with rules from this repository.
2. Then execute the mess detection with phpmd-extension.phar [path/to/src] xml [path/to/phpmd.xml]. The phpmd-extension.phar pass all arguments to the basic phpmd command. You don't have to install phpmd. phpmd-extension.phar includes phpmd.

Basic Rules

<ruleset name="basic-rules"
         xmlns="http://pmd.sf.net/ruleset/1.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0
                      http://pmd.sf.net/ruleset_xml_schema.xsd"
         xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
    <description>mess detection</description>

    <rule ref="rulesets/cleancode.xml" />
    <rule ref="rulesets/codesize.xml">
        <exclude name="ExcessiveParameterList" />
        <exclude name="ExcessiveMethodLength" />
        <exclude name="ExcessiveClassLength" />
        <exclude name="CyclomaticComplexity" />
    </rule>
    <rule ref="rulesets/codesize.xml/ExcessiveParameterList">
        <properties>
            <property name="minimum" value="4" />
        </properties>
    </rule>
    <rule ref="rulesets/codesize.xml/ExcessiveMethodLength">
        <properties>
            <property name="minimum" value="31" />
            <property name="ignore-whitespace" value="true" />
        </properties>
    </rule>
    <rule ref="rulesets/codesize.xml/ExcessiveClassLength">
        <properties>
            <property name="minimum" value="301" />
            <property name="ignore-whitespace" value="true" />
        </properties>
    </rule>
    <rule ref="rulesets/codesize.xml/CyclomaticComplexity">
        <properties>
            <property name="reportLevel" value="6" />
            <property name="showClassesComplexity" value="true" />
            <property name="showMethodsComplexity" value="true" />
        </properties>
    </rule>
    <rule ref="rulesets/controversial.xml" />
    <rule ref="rulesets/design.xml" />
    <rule ref="rulesets/naming.xml">
        <exclude name="ShortVariable" />
        <exclude name="LongVariable" />
    </rule>
    <rule ref="rulesets/naming.xml/ShortVariable">
        <properties>
            <property name="minimum" value="2" />
        </properties>
    </rule>
    <rule ref="rulesets/naming.xml/LongVariable">
        <properties>
            <property name="maximum" value="30" />
        </properties>
    </rule>
    <rule ref="rulesets/unusedcode.xml" />
</ruleset>

Add extra rules

    <rule ref="../../../../../../rulesets/cleancode.xml" />
    <rule ref="../../../../../../rulesets/naming.xml" />
    <rule ref="../../../../../../rulesets/test.xml" />

You can also customize the rules with own properties or use only specific rules. Just take a look in the xml files. It works as the basic ruleset logic.

Exclude or customize extra rule

If you don't want the Law-of-Demeter rule MemberPrimaryPrefix exclude it.

    <rule ref="../../../../../../rulesets/cleancode.xml">
        <exclude name="MemberPrimaryPrefix" />
    </rule>

If you want to customize it, use the following code:

    <rule ref="../../../../../../rulesets/cleancode.xml/MemberPrimaryPrefix">
    	<properties>
	    <property name="maxChainCount" value="3" description="max count of method chains" />
            <property name="allowedPrefixes" value="add,set" description="allowed prefixes for the method train" />
            <property name="delimiter" value="," description="delimiter for explode" />
        </properties>
    </rule>